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feat(docs): migrate from .md to .rst (#4129)

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Kevin Schlosser
2023-04-27 06:42:02 -06:00
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# Contributor Covenant Code of Conduct
## Our Pledge
In the interest of fostering an open and welcoming environment, we as contributors and maintainers pledge to making participation in our project and our community a harassment-free experience for everyone, regardless of age, body size, disability, ethnicity, gender identity and expression, level of experience, nationality, personal appearance, race, religion, or sexual identity and orientation.
## Our Standards
Examples of behavior that contributes to creating a positive environment include:
* Using welcoming and inclusive language
* Being respectful of differing viewpoints and experiences
* Gracefully accepting constructive criticism
* Focusing on what is best for the community
* Showing empathy towards other community members
Examples of unacceptable behavior by participants include:
* The use of sexualized language or imagery and unwelcome sexual attention or advances
* Trolling, insulting/derogatory comments, and personal or political attacks
* Public or private harassment
* Publishing others' private information, such as a physical or electronic address, without explicit permission
* Other conduct which could reasonably be considered inappropriate in a professional setting
## Our Responsibilities
Project maintainers are responsible for clarifying the standards of acceptable behavior and are expected to take appropriate and fair corrective action in response to any instances of unacceptable behavior.
Project maintainers have the right and responsibility to remove, edit, or reject comments, commits, code, wiki edits, issues, and other contributions that are not aligned to this Code of Conduct, or to ban temporarily or permanently any contributor for other behaviors that they deem inappropriate, threatening, offensive, or harmful.
## Scope
This Code of Conduct applies both within project spaces and in public spaces when an individual is representing the project or its community. Examples of representing a project or community include using an official project e-mail address, posting via an official social media account, or acting as an appointed representative at an online or offline event. Representation of a project may be further defined and clarified by project maintainers.
## Enforcement
Instances of abusive, harassing, or otherwise unacceptable behavior may be reported by contacting the project team using the [contact form](https://lvgl.io/about). All complaints will be reviewed and investigated and will result in a response that is deemed necessary and appropriate to the circumstances. The project team is obligated to maintain confidentiality with regard to the reporter of an incident. Further details of specific enforcement policies may be posted separately.
Project maintainers who do not follow or enforce the Code of Conduct in good faith may face temporary or permanent repercussions as determined by other members of the project's leadership.
## Attribution
This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4, available at [http://contributor-covenant.org/version/1/4][version]
[homepage]: http://contributor-covenant.org
[version]: http://contributor-covenant.org/version/1/4/
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Contributor Covenant Code of Conduct
====================================
Our Pledge
----------
In the interest of fostering an open and welcoming environment, we as
contributors and maintainers pledge to making participation in our
project and our community a harassment-free experience for everyone,
regardless of age, body size, disability, ethnicity, gender identity and
expression, level of experience, nationality, personal appearance, race,
religion, or sexual identity and orientation.
Our Standards
-------------
Examples of behavior that contributes to creating a positive environment
include:
- Using welcoming and inclusive language
- Being respectful of differing viewpoints and experiences
- Gracefully accepting constructive criticism
- Focusing on what is best for the community
- Showing empathy towards other community members
Examples of unacceptable behavior by participants include:
- The use of sexualized language or imagery and unwelcome sexual
attention or advances
- Trolling, insulting/derogatory comments, and personal or political
attacks
- Public or private harassment
- Publishing others’ private information, such as a physical or
electronic address, without explicit permission
- Other conduct which could reasonably be considered inappropriate in a
professional setting
Our Responsibilities
--------------------
Project maintainers are responsible for clarifying the standards of
acceptable behavior and are expected to take appropriate and fair
corrective action in response to any instances of unacceptable behavior.
Project maintainers have the right and responsibility to remove, edit,
or reject comments, commits, code, wiki edits, issues, and other
contributions that are not aligned to this Code of Conduct, or to ban
temporarily or permanently any contributor for other behaviors that they
deem inappropriate, threatening, offensive, or harmful.
Scope
-----
This Code of Conduct applies both within project spaces and in public
spaces when an individual is representing the project or its community.
Examples of representing a project or community include using an
official project e-mail address, posting via an official social media
account, or acting as an appointed representative at an online or
offline event. Representation of a project may be further defined and
clarified by project maintainers.
Enforcement
-----------
Instances of abusive, harassing, or otherwise unacceptable behavior may
be reported by contacting the project team using the `contact
form <https://lvgl.io/about>`__. All complaints will be reviewed and
investigated and will result in a response that is deemed necessary and
appropriate to the circumstances. The project team is obligated to
maintain confidentiality with regard to the reporter of an incident.
Further details of specific enforcement policies may be posted
separately.
Project maintainers who do not follow or enforce the Code of Conduct in
good faith may face temporary or permanent repercussions as determined
by other members of the project’s leadership.
Attribution
-----------
This Code of Conduct is adapted from the `Contributor
Covenant <http://contributor-covenant.org>`__, version 1.4, available at
`http://contributor-covenant.org/version/1/4 <http://contributor-covenant.org/version/1/4/>`__
docs/CODING_STYLE.md
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# Coding style
## File format
Use [misc/lv_templ.c](https://github.com/lvgl/lvgl/blob/master/src/misc/lv_templ.c) and [misc/lv_templ.h](https://github.com/lvgl/lvgl/blob/master/src/misc/lv_templ.h)
## Naming conventions
* Words are separated by '_'
* In variable and function names use only lower case letters (e.g. *height_tmp*)
* In enums and defines use only upper case letters (e.g. *e.g. MAX_LINE_NUM*)
* Global names (API):
* start with *lv*
* followed by module name: *btn*, *label*, *style* etc.
* followed by the action (for functions): *set*, *get*, *refr* etc.
* closed with the subject: *name*, *size*, *state* etc.
* Typedefs
* prefer `typedef struct` and `typedef enum` instead of `struct name` and `enum name`
* always end `typedef struct` and `typedef enum` type names with `_t`
* Abbreviations:
* Only words longer or equal than 6 characters can be abbreviated.
* Abbreviate only if it makes the word at least half as long
* Use only very straightforward and well-known abbreviations (e.g. pos: position, def: default, btn: button)
## Coding guide
* Functions:
* Try to write function shorter than is 50 lines
* Always shorter than 200 lines (except very straightforwards)
* Variables:
* One line, one declaration (BAD: char x, y;)
* Use `<stdint.h>` (*uint8_t*, *int32_t* etc)
* Declare variables where needed (not all at function start)
* Use the smallest required scope
* Variables in a file (outside functions) are always *static*
* Do not use global variables (use functions to set/get static variables)
## Comments
Before every function have a comment like this:
```c
/**
* Return with the screen of an object
* @param obj pointer to an object
* @return pointer to a screen
*/
lv_obj_t * lv_obj_get_scr(lv_obj_t * obj);
```
Always use `/*Something*/` format and NOT `//Something`
Write readable code to avoid descriptive comments like:
`x++; /*Add 1 to x*/`.
The code should show clearly what you are doing.
You should write **why** have you done this:
`x++; /*Because of closing '\0' of the string*/`
Short "code summaries" of a few lines are accepted. E.g. `/*Calculate the new coordinates*/`
In comments use \` \` when referring to a variable. E.g. ``/*Update the value of `x_act`*/``
### Formatting
Here is example to show bracket placing and using of white spaces:
```c
/**
* Set a new text for a label. Memory will be allocated to store the text by the label.
* @param label pointer to a label object
* @param text '\0' terminated character string. NULL to refresh with the current text.
*/
void lv_label_set_text(lv_obj_t * label, const char * text)
{ /*Main brackets of functions in new line*/
if(label == NULL) return; /*No bracket only if the command is inline with the if statement*/
lv_obj_inv(label);
lv_label_ext_t * ext = lv_obj_get_ext(label);
/*Comment before a section*/
if(text == ext->txt || text == NULL) { /*Bracket of statements start inline*/
lv_label_refr_text(label);
return;
}
...
}
```
Use 4 spaces indentation instead of tab.
You can use **astyle** to format the code. Run `code-format.py` from the `scripts` folder.
#### pre-commit
[pre-commit](https://pre-commit.com/) is a multi-language package manager for pre-commit hooks.
See the [instalation guide](https://pre-commit.com/#installation) to get pre-commit python package
installed into your development machine.
Once you have `pre-commit` installed you will need to [set up the git hook scripts](https://pre-commit.com/#3-install-the-git-hook-scripts) with:
```console
pre-commit install
```
now `pre-commit` will run automatically on `git commit`!
##### Hooks
The `format-source` local hook (see `.pre-commit-config.yaml`) runs **astyle** on all the staged source and header
files (that are not excluded, see `exclude` key of the hook configuration) before entering the commit message,
if any file gets formatted by **astyle** you will need to add the change to the staging area and run `git commit` again.
The `trailing-whitespace` hook fixes trailing whitespaces on all of the files.
##### Skipping hooks
If you want to skip any particular hook you can do so with:
```console
SKIP=name-of-the-hook git commit
```
##### Testing hooks
It's no necessary to do a commit to test the hooks, you can test hooks by adding the files into the staging area and run:
```console
pre-commit run name-of-the-hook
```
docs/CODING_STYLE.rst
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Coding style
============
File format
-----------
Use `misc/lv_templ.c <https://github.com/lvgl/lvgl/blob/master/src/misc/lv_templ.c>`__
and `misc/lv_templ.h <https://github.com/lvgl/lvgl/blob/master/src/misc/lv_templ.h>`__
Naming conventions
------------------
- Words are separated by ’\_’
- In variable and function names use only lower case letters
(e.g. *height_tmp*)
- In enums and defines use only upper case letters
(e.g. *e.g. MAX_LINE_NUM*)
- Global names (API):
- start with *lv*
- followed by module name: *btn*, *label*, *style* etc.
- followed by the action (for functions): *set*, *get*, *refr* etc.
- closed with the subject: *name*, *size*, *state* etc.
- Typedefs
- prefer ``typedef struct`` and ``typedef enum`` instead of
``struct name`` and ``enum name``
- always end ``typedef struct`` and ``typedef enum`` type names with
``_t``
- Abbreviations:
- Only words longer or equal than 6 characters can be abbreviated.
- Abbreviate only if it makes the word at least half as long
- Use only very straightforward and well-known abbreviations
(e.g. pos: position, def: default, btn: button)
Coding guide
------------
- Functions:
- Try to write function shorter than is 50 lines
- Always shorter than 200 lines (except very straightforwards)
- Variables:
- One line, one declaration (BAD: char x, y;)
- Use ``<stdint.h>`` (*uint8_t*, *int32_t* etc)
- Declare variables where needed (not all at function start)
- Use the smallest required scope
- Variables in a file (outside functions) are always *static*
- Do not use global variables (use functions to set/get static
variables)
Comments
--------
Before every function have a comment like this:
.. code:: c
/**
* Return with the screen of an object
* @param obj pointer to an object
* @return pointer to a screen
*/
lv_obj_t * lv_obj_get_scr(lv_obj_t * obj);
Always use ``/*Something*/`` format and NOT ``//Something``
Write readable code to avoid descriptive comments like:
``x++; /*Add 1 to x*/``. The code should show clearly what you are
doing.
You should write **why** have you done this:
``x++; /*Because of closing '\0' of the string*/``
Short “code summaries” of a few lines are accepted. E.g.
``/*Calculate the new coordinates*/``
In comments use \` \` when referring to a variable. E.g.
:literal:`/\*Update the value of \`x_act`*/`
Formatting
----------
Here is example to show bracket placing and using of white spaces:
.. code:: c
/**
* Set a new text for a label. Memory will be allocated to store the text by the label.
* @param label pointer to a label object
* @param text '\0' terminated character string. NULL to refresh with the current text.
*/
void lv_label_set_text(lv_obj_t * label, const char * text)
{ /*Main brackets of functions in new line*/
if(label == NULL) return; /*No bracket only if the command is inline with the if statement*/
lv_obj_inv(label);
lv_label_ext_t * ext = lv_obj_get_ext(label);
/*Comment before a section*/
if(text == ext->txt || text == NULL) { /*Bracket of statements start inline*/
lv_label_refr_text(label);
return;
}
...
}
Use 4 spaces indentation instead of tab.
You can use **astyle** to format the code. Run ``code-format.py`` from
the ``scripts`` folder.
pre-commit
----------
`pre-commit <https://pre-commit.com/>`__ is a multi-language package
manager for pre-commit hooks. See the `instalation
guide <https://pre-commit.com/#installation>`__ to get pre-commit python
package installed into your development machine.
Once you have ``pre-commit`` installed you will need to `set up the git
hook scripts <https://pre-commit.com/#3-install-the-git-hook-scripts>`__
with:
.. code:: console
pre-commit install
now ``pre-commit`` will run automatically on ``git commit``!
Hooks
-----
The ``format-source`` local hook (see ``.pre-commit-config.yaml``) runs
**astyle** on all the staged source and header files (that are not
excluded, see ``exclude`` key of the hook configuration) before entering
the commit message, if any file gets formatted by **astyle** you will
need to add the change to the staging area and run ``git commit`` again.
The ``trailing-whitespace`` hook fixes trailing whitespaces on all of
the files.
Skipping hooks
--------------
If you want to skip any particular hook you can do so with:
.. code:: console
SKIP=name-of-the-hook git commit
Testing hooks
-------------
It’s no necessary to do a commit to test the hooks, you can test hooks
by adding the files into the staging area and run:
.. code:: console
pre-commit run name-of-the-hook
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# Contributing
## Introduction
Join LVGL's community and leave your footprint in the library!
There are a lot of ways to contribute to LVGL even if you are new to the library or even new to programming.
It might be scary to make the first step but you have nothing to be afraid of.
A friendly and helpful community is waiting for you. Get to know like-minded people and make something great together.
So let's find which contribution option fits you the best and help you join the development of LVGL!
Before getting started here are some guidelines to make contribution smoother:
- Be kind and friendly.
- Be sure to read the relevant part of the documentation before posting a question.
- Ask questions in the [Forum](https://forum.lvgl.io/) and use [GitHub](https://github.com/lvgl/) for development-related discussions.
- Always fill out the post or issue templates in the Forum or GitHub (or at least provide equivalent information). It makes understanding your contribution or issue easier and you will get a useful response faster.
- If possible send an absolute minimal but buildable code example in order to reproduce the issue. Be sure it contains all the required variable declarations, constants, and assets (images, fonts).
- Use [Markdown](https://github.com/adam-p/markdown-here/wiki/Markdown-Cheatsheet) to format your posts. You can learn it in 10 minutes.
- Speak about one thing in one issue or topic. It makes your post easier to find later for someone with the same question.
- Give feedback and close the issue or mark the topic as solved if your question is answered.
- For non-trivial fixes and features, it's better to open an issue first to discuss the details instead of sending a pull request directly.
- Please read and follow the <a href="https://github.com/lvgl/lvgl/blob/master/docs/CODING_STYLE.md">Coding style</a> guide.
## Pull request
Merging new code into the lvgl, documentation, blog, examples, and other repositories happen via *Pull requests* (PR for short).
A PR is a notification like "Hey, I made some updates to your project. Here are the changes, you can add them if you want."
To do this you need a copy (called fork) of the original project under your account, make some changes there, and notify the original repository about your updates.
You can see what it looks like on GitHub for LVGL here: [https://github.com/lvgl/lvgl/pulls](https://github.com/lvgl/lvgl/pulls).
To add your changes you can edit files online on GitHub and send a new Pull request from there (recommended for small changes) or
add the updates in your favorite editor/IDE and use git to publish the changes (recommended for more complex updates).
### From GitHub
1. Navigate to the file you want to edit.
2. Click the Edit button in the top right-hand corner.
3. Add your changes to the file.
4. Add a commit message on the bottom of the page.
5. Click the *Propose changes* button.
### From command line
The instructions describe the main `lvgl` repository but it works the same way for the other repositories.
1. Fork the [lvgl repository](https://github.com/lvgl/lvgl). To do this click the "Fork" button in the top right corner.
It will "copy" the `lvgl` repository to your GitHub account (`https://github.com/<YOUR_NAME>?tab=repositories`)
2. Clone your forked repository.
3. Add your changes. You can create a *feature branch* from *master* for the updates: `git checkout -b the-new-feature`
4. Commit and push your changes to the forked `lvgl` repository.
5. Create a PR on GitHub from the page of your `lvgl` repository (`https://github.com/<YOUR_NAME>/lvgl`) by clicking the *"New pull request"* button. Don't forget to select the branch where you added your changes.
7. Set the base branch. It means where you want to merge your update. In the `lvgl` repo both the fixes and new features go to `master` branch.
8. Describe what is in the update. An example code is welcome if applicable.
9. If you need to make more changes, just update your forked `lvgl` repo with new commits. They will automatically appear in the PR.
### Commit message format
The commit messages format is inspired by [Angular Commit Format](https://gist.github.com/brianclements/841ea7bffdb01346392c).
The following structure should be used:
```
<type>(<scope>): <subject>
<BLANK LINE>
<body>
<BLANK LINE>
<footer>
```
Possible `<type>`s:
- `fix` bugfix in the source code.
- `feat` new feature
- `arch` architectural changes
- `perf` changes that affect the performance
- `example` anything related to examples (even fixes and new examples)
- `docs` anything related to the documentation (even fixes, formatting, and new pages)
- `test` anything related to tests (new and updated tests or CI actions)
- `chore` any minor formatting or style changes that would make the changelog noisy
`<scope>` is the module, file, or sub-system that is affected by the commit. It's usually one word and can be chosen freely.
For example `img`, `layout`, `txt`, `anim`. The scope can be omitted.
`<subject>` contains a short description of the change:
- use the imperative, present tense: "change" not "changed" nor "changes"
- don't capitalize the first letter
- no dot (.) at the end
- max 90 characters
`<body>` optional and can be used to describe the details of this change.
`<footer>` shall contain
- the words "BREAKING CHANGE" if the changes break the API
- reference to the GitHub issue or Pull Request if applicable.
Some examples:
```
fix(img): update size if a new source is set
```
```
fix(bar): fix memory leak
The animations weren't deleted in the destructor.
Fixes: #1234
```
```
feat: add span widget
The span widget allows mixing different font sizes, colors and styles.
It's similar to HTML <span>
```
```
docs(porting): fix typo
```
## Developer Certification of Origin (DCO)
### Overview
To ensure all licensing criteria are met for every repository of the LVGL project, we apply a process called DCO (Developer's Certificate of Origin).
The text of DCO can be read here: [https://developercertificate.org/](https://developercertificate.org/).
By contributing to any repositories of the LVGL project you agree that your contribution complies with the DCO.
If your contribution fulfills the requirements of the DCO no further action is needed. If you are unsure feel free to ask us in a comment.
### Accepted licenses and copyright notices
To make the DCO easier to digest, here are some practical guides about specific cases:
#### Your own work
The simplest case is when the contribution is solely your own work.
In this case you can just send a Pull Request without worrying about any licensing issues.
#### Use code from online source
If the code you would like to add is based on an article, post or comment on a website (e.g. StackOverflow) the license and/or rules of that site should be followed.
For example in case of StackOverflow a notice like this can be used:
```
/* The original version of this code-snippet was published on StackOverflow.
* Post: http://stackoverflow.com/questions/12345
* Author: http://stackoverflow.com/users/12345/username
* The following parts of the snippet were changed:
* - Check this or that
* - Optimize performance here and there
*/
... code snippet here ...
```
#### Use MIT licensed code
As LVGL is MIT licensed, other MIT licensed code can be integrated without issues.
The MIT license requires a copyright notice be added to the derived work. Any derivative work based on MIT licensed code must copy the original work's license file or text.
#### Use GPL licensed code
The GPL license is not compatible with the MIT license. Therefore, LVGL can not accept GPL licensed code.
## Ways to contribute
Even if you're just getting started with LVGL there are plenty of ways to get your feet wet.
Most of these options don't even require knowing a single line of LVGL code.
Below we have collected some opportunities about the ways you can contribute to LVGL.
### Give LVGL a Star
Show that you like LVGL by giving it star on GitHub!
<!-- Place this tag in your head or just before your close body tag. -->
<script async defer src="https://buttons.github.io/buttons.js"></script>
<!-- Place this tag where you want the button to render. -->
<a class="github-button" href="https://github.com/lvgl/lvgl" data-icon="octicon-star" data-size="large" data-show-count="true" aria-label="Star lvgl/lvgl on GitHub">Star</a>
This simple click makes LVGL more visible on GitHub and makes it more attractive to other people.
So with this, you already helped a lot!
### Tell what you have achieved
Have you already started using LVGL in a [Simulator](/get-started/platforms/pc-simulator), a development board, or on your custom hardware?
Was it easy or were there some obstacles? Are you happy with the result?
Showing your project to others is a win-win situation because it increases your and LVGL's reputation at the same time.
You can post about your project on Twitter, Facebook, LinkedIn, create a YouTube video, and so on.
Only one thing: On social media don't forget to add a link to `https://lvgl.io` or `https://github.com/lvgl` and use the hashtag `#lvgl`. Thank you! :)
You can also open a new topic in the [My projects](https://forum.lvgl.io/c/my-projects/10) category of the Forum.
The [LVGL Blog](https://blog.lvgl.io) welcomes posts from anyone.
It's a good place to talk about a project you created with LVGL, write a tutorial, or share some nice tricks.
The latest blog posts are shown on the [homepage of LVGL](https://lvgl.io) to make your work more visible.
The blog is hosted on GitHub. If you add a post GitHub automatically turns it into a website.
See the [README](https://github.com/lvgl/blog) of the blog repo to see how to add your post.
Any of these help to spread the word and familiarize new developers with LVGL.
If you don't want to speak about your project publicly, feel free to use [Contact form](https://lvgl.io/#contact) on lvgl.io to private message to us.
### Write examples
As you learn LVGL you will probably play with the features of widgets. Why not publish your experiments?
Each widgets' documentation contains examples. For instance, here are the examples of the [Drop-down list](/widgets/dropdown#examples) widget.
The examples are directly loaded from the [lvgl/examples](https://github.com/lvgl/lvgl/tree/master/examples) folder.
So all you need to do is send a [Pull request](#pull-request) to the [lvgl](https://github.com/lvgl/lvgl) repository and follow some conventions:
- Name the examples like `lv_example_<widget_name>_<index>`.
- Make the example as short and simple as possible.
- Add comments to explain what the example does.
- Use 320x240 resolution.
- Update `index.rst` in the example's folder with your new example. To see how other examples are added, look in the [lvgl/examples/widgets](https://github.com/lvgl/lvgl/tree/master/examples/widgets) folder.
### Improve the docs
As you read the documentation you might see some typos or unclear sentences. All the documentation is located in the [lvgl/docs](https://github.com/lvgl/lvgl/tree/master/docs) folder.
For typos and straightforward fixes, you can simply edit the file on GitHub.
Note that the documentation is also formatted in [Markdown](https://github.com/adam-p/markdown-here/wiki/Markdown-Cheatsheet).
### Report bugs
As you use LVGL you might find bugs. Before reporting them be sure to check the relevant parts of the documentation.
If it really seems like a bug feel free to open an [issue on GitHub](https://github.com/lvgl/lvgl/issues).
When filing the issue be sure to fill out the template. It helps find the root of the problem while avoiding extensive questions and exchanges with other developers.
### Send fixes
The beauty of open-source software is you can easily dig in to it to understand how it works. You can also fix or adjust it as you wish.
If you found and fixed a bug don't hesitate to send a [Pull request](#pull-request) with the fix.
In your Pull request please also add a line to [`CHANGELOG.md`](https://github.com/lvgl/lvgl/blob/master/CHANGELOG.md).
### Join the conversations in the Forum
It feels great to know you are not alone if something is not working. It's even better to help others when they struggle with something.
While you were learning LVGL you might have had questions and used the Forum to get answers. As a result, you probably have more knowledge about how LVGL works.
One of the best ways to give back is to use the Forum and answer the questions of newcomers - like you were once.
Just read the titles and if you are familiar with the topic don't hesitate to share your thoughts and suggestions.
Participating in the discussions is one of the best ways to become part of the project and get to know like-minded people!
### Add features
If you have created a cool widget, or added useful feature to LVGL feel free to open a new PR for it.
We collect the optional features (a.k.a. plugins) in [lvgl/src/extra](https://github.com/lvgl/lvgl/tree/master/src/extra) folder so if you are interested in adding a new features please use this folder.
The [README](https://github.com/lvgl/lvgl/blob/master/src/extra/README.md) file describes the basics rules of contribution and also lists some ideas.
For further ideas take a look at the [Roadmap](/ROADMAP) page. If you are interested in any of them feel free to share your opinion and/or participate in the implementation.
Other features which are (still) not on the road map are listed in the [Feature request](https://forum.lvgl.io/c/feature-request/9) category of the Forum.
When adding a new features the followings also needs to be updated:
- Update [lv_conf_template.h](https://github.com/lvgl/lvgl/blob/master/lv_conf_template.h)
- Add description in the [docs](https://github.com/lvgl/lvgl/tree/master/docs)
- Add [examples](https://github.com/lvgl/lvgl/tree/master/examples)
- Update the [changelog](https://github.com/lvgl/lvgl/tree/master/docs/CHANGELOG.md)
### Become a maintainer
If you want to become part of the core development team, you can become a maintainer of a repository.
By becoming a maintainer:
- You get write access to that repo:
- Add code directly without sending a pull request
- Accept pull requests
- Close/reopen/edit issues
- Your input has higher impact when we are making decisions
You can become a maintainer by invitation, however the following conditions need to met
1. Have > 50 replies in the Forum. You can look at your stats [here](https://forum.lvgl.io/u?period=all)
2. Send > 5 non-trivial pull requests to the repo where you would like to be a maintainer
If you are interested, just send a message (e.g. from the Forum) to the current maintainers of the repository. They will check if the prerequisites are met.
Note that meeting the prerequisites is not a guarantee of acceptance, i.e. if the conditions are met you won't automatically become a maintainer.
It's up to the current maintainers to make the decision.
### Move your project repository under LVGL organization
Besides the core `lvgl` repository there are other repos for ports to development boards, IDEs or other environment.
If you ported LVGL to a new platform we can host it under the LVGL organization among the other repos.
This way your project will become part of the whole LVGL project and can get more visibility.
If you are interested in this opportunity just open an [issue in lvgl repo](https://github.com/lvgl/lvgl/issues) and tell what you have!
If we agree that your port fit well into the LVGL organization, we will open a repository for your project where you will have admin rights.
To make this concept sustainable there a few rules to follow:
- You need to add a README to your repo.
- We expect to maintain the repo to some extent:
- Follow at least the major versions of LVGL
- Respond to the issues (in a reasonable time)
- If there is no activity in a repo for 1 year it will be archived
docs/CONTRIBUTING.rst
+431
View File
@@ -0,0 +1,431 @@
.. _contributing:
Contributing
============
Introduction
------------
Join LVGL’s community and leave your footprint in the library!
There are a lot of ways to contribute to LVGL even if you are new to the
library or even new to programming.
It might be scary to make the first step but you have nothing to be
afraid of. A friendly and helpful community is waiting for you. Get to
know like-minded people and make something great together.
So let’s find which contribution option fits you the best and help you
join the development of LVGL!
Before getting started here are some guidelines to make contribution smoother:
- Be kind and friendly.
- Be sure to read the relevant part of the documentation before posting a question.
- Ask questions in the `Forum <https://forum.lvgl.io/>`__ and use
`GitHub <https://github.com/lvgl/>`__ for development-related discussions.
- Always fill out the post or issue templates in the Forum or GitHub (or at least provide equivalent information). It makes
understanding your contribution or issue easier and you will get a useful response faster.
- If possible send an absolute minimal but buildable code example in order to reproduce the issue. Be sure it
contains all the required variable declarations, constants, and assets (images, fonts).
- Use `Markdown <https://github.com/adam-p/markdown-here/wiki/Markdown-Cheatsheet>`__
to format your posts. You can learn it in 10 minutes.
- Speak about one thing in one issue or topic. It makes your post easier to find later for
someone with the same question.
- Give feedback and close the issue or mark the topic as solved if your question is answered.
- For non-trivial fixes and features, it’s better to open an issue first to discuss the
details instead of sending a pull request directly.
- Please read and follow the Coding style guide.
Pull request
------------
Merging new code into the lvgl, documentation, blog, examples, and other
repositories happen via *Pull requests* (PR for short). A PR is a
notification like “Hey, I made some updates to your project. Here are
the changes, you can add them if you want.” To do this you need a copy
(called fork) of the original project under your account, make some
changes there, and notify the original repository about your updates.
You can see what it looks like on GitHub for LVGL here:
https://github.com/lvgl/lvgl/pulls.
To add your changes you can edit files online on GitHub and send a new
Pull request from there (recommended for small changes) or add the
updates in your favorite editor/IDE and use git to publish the changes
(recommended for more complex updates).
From GitHub
~~~~~~~~~~~
1. Navigate to the file you want to edit.
2. Click the Edit button in the top right-hand corner.
3. Add your changes to the file.
4. Add a commit message on the bottom of the page.
5. Click the *Propose changes* button.
From command line
~~~~~~~~~~~~~~~~~
The instructions describe the main ``lvgl`` repository but it works the
same way for the other repositories.
1. Fork the `lvgl repository <https://github.com/lvgl/lvgl>`__. To do this click the
“Fork” button in the top right corner. It will “copy” the ``lvgl``
repository to your GitHub account (``https://github.com/<YOUR_NAME>?tab=repositories``)
2. Clone your forked repository.
3. Add your changes. You can create a *feature branch* from *master* for the updates: ``git checkout -b the-new-feature``
4. Commit and push your changes to the forked ``lvgl`` repository.
5. Create a PR on GitHub from the page of your ``lvgl`` repository (``https://github.com/<YOUR_NAME>/lvgl``) by
clicking the *“New pull request”* button. Don’t forget to select the branch where you added your changes.
6. Set the base branch. It means where you want to merge your update. In the ``lvgl`` repo both the fixes
and new features go to ``master`` branch.
7. Describe what is in the update. An example code is welcome if applicable.
8. If you need to make more changes, just update your forked ``lvgl`` repo with new commits.
They will automatically appear in the PR.
Commit message format
~~~~~~~~~~~~~~~~~~~~~
The commit messages format is inspired by `Angular Commit
Format <https://gist.github.com/brianclements/841ea7bffdb01346392c>`__.
The following structure should be used:
.. code-block::
<type>(<scope>): <subject>
<BLANK LINE>
<body>
<BLANK LINE>
<footer>
Possible ``<type>``\ s:
- ``fix`` bugfix in the source code.
- ``feat`` new feature
- ``arch`` architectural changes
- ``perf`` changes that affect the performance
- ``example`` anything related to examples (even fixes and new examples)
- ``docs`` anything related to the documentation (even fixes, formatting, and new pages)
- ``test`` anything related to tests (new and updated tests or CI actions)
- ``chore`` any minor formatting or style changes that would make the changelog noisy
``<scope>`` is the module, file, or sub-system that is affected by the
commit. It’s usually one word and can be chosen freely. For example
``img``, ``layout``, ``txt``, ``anim``. The scope can be omitted.
``<subject>`` contains a short description of the change:
- use the imperative, present tense: “change” not “changed” nor “changes”
- don’t capitalize the first letter
- no dot (.) at the end
- max 90 characters
``<body>`` optional and can be used to describe the details of this
change.
``<footer>`` shall contain
- the words “BREAKING CHANGE” if the changes break the API
- reference to the GitHub issue or Pull Request if applicable.
Some examples:
- fix(img): update size if a new source is set
- fix(bar): fix memory leak
The animations weren't deleted in the destructor.
Fixes: #1234
- feat: add span widget
The span widget allows mixing different font sizes, colors and styles.
It's similar to HTML <span>
- docs(porting): fix typo
Developer Certification of Origin (DCO)
---------------------------------------
Overview
~~~~~~~~
To ensure all licensing criteria are met for every repository of the
LVGL project, we apply a process called DCO (Developer’s Certificate of
Origin).
The text of DCO can be read here: https://developercertificate.org/.
By contributing to any repositories of the LVGL project you agree that
your contribution complies with the DCO.
If your contribution fulfills the requirements of the DCO no further
action is needed. If you are unsure feel free to ask us in a comment.
Accepted licenses and copyright notices
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
To make the DCO easier to digest, here are some practical guides about
specific cases:
Your own work
^^^^^^^^^^^^^
The simplest case is when the contribution is solely your own work. In
this case you can just send a Pull Request without worrying about any
licensing issues.
Use code from online source
^^^^^^^^^^^^^^^^^^^^^^^^^^^
If the code you would like to add is based on an article, post or
comment on a website (e.g. StackOverflow) the license and/or rules of
that site should be followed.
For example in case of StackOverflow a notice like this can be used:
.. code-block::
/* The original version of this code-snippet was published on StackOverflow.
* Post: http://stackoverflow.com/questions/12345
* Author: http://stackoverflow.com/users/12345/username
* The following parts of the snippet were changed:
* - Check this or that
* - Optimize performance here and there
*/
... code snippet here ...
Use MIT licensed code
^^^^^^^^^^^^^^^^^^^^^
As LVGL is MIT licensed, other MIT licensed code can be integrated
without issues. The MIT license requires a copyright notice be added to
the derived work. Any derivative work based on MIT licensed code must
copy the original work’s license file or text.
Use GPL licensed code
^^^^^^^^^^^^^^^^^^^^^
The GPL license is not compatible with the MIT license. Therefore, LVGL
can not accept GPL licensed code.
Ways to contribute
------------------
Even if you’re just getting started with LVGL there are plenty of ways
to get your feet wet. Most of these options don’t even require knowing a
single line of LVGL code.
Below we have collected some opportunities about the ways you can
contribute to LVGL.
Give LVGL a Star
~~~~~~~~~~~~~~~~
Show that you like LVGL by giving it star on GitHub!
.. raw:: html
<script async defer src="https://buttons.github.io/buttons.js"></script>
.. raw:: html
<!-- Place this tag where you want the button to render. -->
Star
This simple click makes LVGL more visible on GitHub and makes it more
attractive to other people. So with this, you already helped a lot!
Tell what you have achieved
~~~~~~~~~~~~~~~~~~~~~~~~~~~
Have you already started using LVGL in a
`Simulator </get-started/platforms/pc-simulator>`__, a development
board, or on your custom hardware? Was it easy or were there some
obstacles? Are you happy with the result? Showing your project to others
is a win-win situation because it increases your and LVGL’s reputation
at the same time.
You can post about your project on Twitter, Facebook, LinkedIn, create a
YouTube video, and so on. Only one thing: On social media don’t forget
to add a link to ``https://lvgl.io`` or ``https://github.com/lvgl`` and
use the hashtag ``#lvgl``. Thank you! :)
You can also open a new topic in the `My
projects <https://forum.lvgl.io/c/my-projects/10>`__ category of the
Forum.
The `LVGL Blog <https://blog.lvgl.io>`__ welcomes posts from anyone.
It’s a good place to talk about a project you created with LVGL, write a
tutorial, or share some nice tricks. The latest blog posts are shown on
the `homepage of LVGL <https://lvgl.io>`__ to make your work more
visible.
The blog is hosted on GitHub. If you add a post GitHub automatically
turns it into a website. See the
`README <https://github.com/lvgl/blog>`__ of the blog repo to see how to
add your post.
Any of these help to spread the word and familiarize new developers with
LVGL.
If you don’t want to speak about your project publicly, feel free to use
`Contact form <https://lvgl.io/#contact>`__ on lvgl.io to private
message to us.
Write examples
~~~~~~~~~~~~~~
As you learn LVGL you will probably play with the features of widgets.
Why not publish your experiments?
Each widgets’ documentation contains examples. For instance, here are
the examples of the `Drop-down list </widgets/dropdown#examples>`__
widget. The examples are directly loaded from the
`lvgl/examples <https://github.com/lvgl/lvgl/tree/master/examples>`__
folder.
So all you need to do is send a `Pull request <#pull-request>`__ to the
`lvgl <https://github.com/lvgl/lvgl>`__ repository and follow some
conventions:
- Name the examples like ``lv_example_<widget_name>_<index>``.
- Make the example as short and simple as possible.
- Add comments to explain what the example does.
- Use 320x240 resolution.
- Update ``index.rst`` in the example’s folder with your new example. To see how other examples are added, look in the
`lvgl/examples/widgets <https://github.com/lvgl/lvgl/tree/master/examples/widgets>`__
folder.
Improve the docs
~~~~~~~~~~~~~~~~
As you read the documentation you might see some typos or unclear
sentences. All the documentation is located in the
`lvgl/docs <https://github.com/lvgl/lvgl/tree/master/docs>`__ folder.
For typos and straightforward fixes, you can simply edit the file on
GitHub.
Note that the documentation is also formatted in
`Markdown <https://github.com/adam-p/markdown-here/wiki/Markdown-Cheatsheet>`__.
Report bugs
~~~~~~~~~~~
As you use LVGL you might find bugs. Before reporting them be sure to
check the relevant parts of the documentation.
If it really seems like a bug feel free to open an `issue on
GitHub <https://github.com/lvgl/lvgl/issues>`__.
When filing the issue be sure to fill out the template. It helps find
the root of the problem while avoiding extensive questions and exchanges
with other developers.
Send fixes
~~~~~~~~~~
The beauty of open-source software is you can easily dig in to it to
understand how it works. You can also fix or adjust it as you wish.
If you found and fixed a bug don’t hesitate to send a `Pull
request <#pull-request>`__ with the fix.
In your Pull request please also add a line to
```CHANGELOG.md`` <https://github.com/lvgl/lvgl/blob/master/CHANGELOG.md>`__.
Join the conversations in the Forum
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
It feels great to know you are not alone if something is not working.
It’s even better to help others when they struggle with something.
While you were learning LVGL you might have had questions and used the
Forum to get answers. As a result, you probably have more knowledge
about how LVGL works.
One of the best ways to give back is to use the Forum and answer the
questions of newcomers - like you were once.
Just read the titles and if you are familiar with the topic don’t
hesitate to share your thoughts and suggestions.
Participating in the discussions is one of the best ways to become part
of the project and get to know like-minded people!
Add features
~~~~~~~~~~~~
If you have created a cool widget, or added useful feature to LVGL feel
free to open a new PR for it. We collect the optional features (a.k.a.
plugins) in
`lvgl/src/extra <https://github.com/lvgl/lvgl/tree/master/src/extra>`__
folder so if you are interested in adding a new features please use this
folder. The
`README <https://github.com/lvgl/lvgl/blob/master/src/extra/README.md>`__
file describes the basics rules of contribution and also lists some
ideas.
For further ideas take a look at the `Roadmap </ROADMAP>`__ page. If you
are interested in any of them feel free to share your opinion and/or
participate in the implementation.
Other features which are (still) not on the road map are listed in the
`Feature request <https://forum.lvgl.io/c/feature-request/9>`__ category
of the Forum.
When adding a new features the followings also needs to be updated:
- Update `lv_conf_template.h <https://github.com/lvgl/lvgl/blob/master/lv_conf_template.h>`__
- Add description in the `docs <https://github.com/lvgl/lvgl/tree/master/docs>`__
- Add `examples <https://github.com/lvgl/lvgl/tree/master/examples>`__
- Update the `changelog <https://github.com/lvgl/lvgl/tree/master/docs/CHANGELOG.md>`__
Become a maintainer
~~~~~~~~~~~~~~~~~~~
If you want to become part of the core development team, you can become
a maintainer of a repository.
By becoming a maintainer:
- You get write access to that repo:
- Add code directly without sending a pull request
- Accept pull requests - Close/reopen/edit issues - Your input has higher impact when we are making decisions
You can become a maintainer by invitation, however the following
conditions need to met 1. Have > 50 replies in the Forum. You can look
at your stats `here <https://forum.lvgl.io/u?period=all>`__ 2. Send > 5
non-trivial pull requests to the repo where you would like to be a
maintainer
If you are interested, just send a message (e.g. from the Forum) to the
current maintainers of the repository. They will check if the
prerequisites are met. Note that meeting the prerequisites is not a
guarantee of acceptance, i.e. if the conditions are met you won’t
automatically become a maintainer. It’s up to the current maintainers to
make the decision.
Move your project repository under LVGL organization
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Besides the core ``lvgl`` repository there are other repos for ports to
development boards, IDEs or other environment. If you ported LVGL to a
new platform we can host it under the LVGL organization among the other
repos.
This way your project will become part of the whole LVGL project and can
get more visibility. If you are interested in this opportunity just open
an `issue in lvgl repo <https://github.com/lvgl/lvgl/issues>`__ and tell
what you have!
If we agree that your port fit well into the LVGL organization, we will
open a repository for your project where you will have admin rights.
To make this concept sustainable there a few rules to follow:
- You need to add a README to your repo.
- We expect to maintain the repo to some extent
- Follow at least the major versions of LVGL
- Respond to the issues (in a reasonable time)
- If there is no activity in a repo for 1 year it will be archived
scripts/Doxyfile → docs/Doxyfile
+19 -19
View File
@@ -58,7 +58,7 @@ PROJECT_LOGO =
# entered, it will be relative to the location where doxygen was started. If
# left blank the current directory will be used.
OUTPUT_DIRECTORY = ../docs
OUTPUT_DIRECTORY = .
# If the CREATE_SUBDIRS tag is set to YES then doxygen will create 4096 sub-
# directories (in 2 levels) under the output directory of each output format and
@@ -244,7 +244,7 @@ ALIASES =
# A mapping has the form "name=value". For example adding "class=itcl::class"
# will allow you to use the command class in the itcl::class meaning.
TCL_SUBST =
# TCL_SUBST = **OBSOLETE**
# Set the OPTIMIZE_OUTPUT_FOR_C tag to YES if your project consists of C sources
# only. Doxygen will then generate output that is more tailored for C. For
@@ -447,13 +447,13 @@ EXTRACT_PRIVATE = NO
# scope will be included in the documentation.
# The default value is: NO.
EXTRACT_PACKAGE = NO
EXTRACT_PACKAGE = YES
# If the EXTRACT_STATIC tag is set to YES, all static members of a file will be
# included in the documentation.
# The default value is: NO.
EXTRACT_STATIC = NO
EXTRACT_STATIC = YES
# If the EXTRACT_LOCAL_CLASSES tag is set to YES, classes (and structs) defined
# locally in source files will be included in the documentation. If set to NO,
@@ -790,7 +790,7 @@ WARN_LOGFILE =
# spaces. See also FILE_PATTERNS and EXTENSION_MAPPING
# Note: If this tag is empty the current directory is searched.
INPUT = ../src
INPUT = *#*#SRC#*#*
# This tag can be used to specify the character encoding of the source files
# that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses
@@ -1066,7 +1066,7 @@ ALPHABETICAL_INDEX = YES
# Minimum value: 1, maximum value: 20, default value: 5.
# This tag requires that the tag ALPHABETICAL_INDEX is set to YES.
COLS_IN_ALPHA_INDEX = 5
# COLS_IN_ALPHA_INDEX = 5 **OBSOLETE**
# In case all classes in a project start with a common prefix, all classes will
# be put under the same header in the alphabetical index. The IGNORE_PREFIX tag
@@ -1483,7 +1483,7 @@ FORMULA_FONTSIZE = 10
# The default value is: YES.
# This tag requires that the tag GENERATE_HTML is set to YES.
FORMULA_TRANSPARENT = YES
# FORMULA_TRANSPARENT = YES **OBSOLETE**
# Enable the USE_MATHJAX option to render LaTeX formulas using MathJax (see
# http://www.mathjax.org) which uses client side Javascript for the rendering
@@ -1771,7 +1771,7 @@ LATEX_HIDE_INDICES = NO
# The default value is: NO.
# This tag requires that the tag GENERATE_LATEX is set to YES.
LATEX_SOURCE_CODE = NO
# LATEX_SOURCE_CODE = NO **OBSOLETE**
# The LATEX_BIB_STYLE tag can be used to specify the style to use for the
# bibliography, e.g. plainnat, or ieeetr. See
@@ -1853,7 +1853,7 @@ RTF_EXTENSIONS_FILE =
# The default value is: NO.
# This tag requires that the tag GENERATE_RTF is set to YES.
RTF_SOURCE_CODE = NO
# RTF_SOURCE_CODE = NO **OBSOLETE**
#---------------------------------------------------------------------------
# Configuration options related to the man page output
@@ -1951,7 +1951,7 @@ DOCBOOK_OUTPUT = docbook
# The default value is: NO.
# This tag requires that the tag GENERATE_DOCBOOK is set to YES.
DOCBOOK_PROGRAMLISTING = NO
# DOCBOOK_PROGRAMLISTING = NO **OBSOLETE**
#---------------------------------------------------------------------------
# Configuration options for the AutoGen Definitions output
@@ -2011,7 +2011,7 @@ PERLMOD_MAKEVAR_PREFIX =
# C-preprocessor directives found in the sources and include files.
# The default value is: YES.
ENABLE_PREPROCESSING = NO
ENABLE_PREPROCESSING = YES
# If the MACRO_EXPANSION tag is set to YES, doxygen will expand all macro names
# in the source code. If set to NO, only conditional compilation will be
@@ -2020,7 +2020,7 @@ ENABLE_PREPROCESSING = NO
# The default value is: NO.
# This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
MACRO_EXPANSION = NO
MACRO_EXPANSION = YES
# If the EXPAND_ONLY_PREDEF and MACRO_EXPANSION tags are both set to YES then
# the macro expansion is limited to the macros specified with the PREDEFINED and
@@ -2060,7 +2060,7 @@ INCLUDE_FILE_PATTERNS =
# recursively expanded use the := operator instead of the = operator.
# This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
PREDEFINED =
PREDEFINED = DOXYGEN
# If the MACRO_EXPANSION and EXPAND_ONLY_PREDEF tags are set to YES then this
# tag can be used to specify a list of macro names that should be expanded. The
@@ -2131,7 +2131,7 @@ EXTERNAL_PAGES = YES
# interpreter (i.e. the result of 'which perl').
# The default file (with absolute path) is: /usr/bin/perl.
PERL_PATH = /usr/bin/perl
# PERL_PATH = /usr/bin/perl **OBSOLETE**
#---------------------------------------------------------------------------
# Configuration options related to the dot tool
@@ -2144,7 +2144,7 @@ PERL_PATH = /usr/bin/perl
# powerful graphs.
# The default value is: YES.
CLASS_DIAGRAMS = YES
# CLASS_DIAGRAMS = YES **OBSOLETE**
# You can define message sequence charts within doxygen comments using the \msc
# command. Doxygen will then run the mscgen tool (see:
@@ -2153,7 +2153,7 @@ CLASS_DIAGRAMS = YES
# the mscgen tool resides. If left empty the tool is assumed to be found in the
# default search path.
MSCGEN_PATH =
# MSCGEN_PATH = **OBSOLETE**
# You can include diagrams made with dia in doxygen documentation. Doxygen will
# then run dia to produce the diagram and insert it in the documentation. The
@@ -2195,14 +2195,14 @@ DOT_NUM_THREADS = 0
# The default value is: Helvetica.
# This tag requires that the tag HAVE_DOT is set to YES.
DOT_FONTNAME = Helvetica
# DOT_FONTNAME = Helvetica **OBSOLETE**
# The DOT_FONTSIZE tag can be used to set the size (in points) of the font of
# dot graphs.
# Minimum value: 4, maximum value: 24, default value: 10.
# This tag requires that the tag HAVE_DOT is set to YES.
DOT_FONTSIZE = 10
# DOT_FONTSIZE = 10 **OBSOLETE**
# By default doxygen will tell dot to use the default font as specified with
# DOT_FONTNAME. If you specify a different font using DOT_FONTNAME you can set
@@ -2428,7 +2428,7 @@ MAX_DOT_GRAPH_DEPTH = 0
# The default value is: NO.
# This tag requires that the tag HAVE_DOT is set to YES.
DOT_TRANSPARENT = NO
# DOT_TRANSPARENT = NO **OBSOLETE**
# Set the DOT_MULTI_TARGETS tag to YES to allow dot to generate multiple output
# files in one run (i.e. multiple -o and -T options on the command line). This
docs/README_jp.md
-430
View File
@@ -1,430 +0,0 @@
<p align="right"><a href="../README.md">English</a> | <a href="./README_zh.md">中文</a> | <a href="./README_pt_BR.md">Português do Brasil</a> | <b>日本語</b></p>
  <br>
<p align="center">
  <img src="https://lvgl.io/assets/images/logo_lvgl.png">
</p>
  <h1 align="center">Light and Versatile Graphics Library</h1>
  <br>
<div align="center">
<img src="https://github.com/kisvegabor/test/raw/master/smartwatch_demo.gif">
&nbsp;
  <img border="1px" src="https://lvgl.io/assets/images/lvgl_widgets_demo.gif">
</div>
<br>
<p align="center">
<a href="https://lvgl-io.translate.goog/?_x_tr_sl=en&_x_tr_tl=ja&_x_tr_hl=ja" title="Homepage of LVGL">Website </a></a> |
<a href="https://docs-lvgl-io.translate.goog/master/index.html?_x_tr_sl=en&_x_tr_tl=ja&_x_tr_hl=ja" title="Detailed documentation with 100+ examples">Docs</a> |
<a href="https://forum.lvgl.io" title="Get help and help others">Forum</a> :gb: |
<a href="https://lvgl-io.translate.goog/demos?_x_tr_sl=en&_x_tr_tl=ja&_x_tr_hl=ja" title="Demos running in your browser">Demos</a> |
<a href="https://lvgl-io.translate.goog/services?_x_tr_sl=en&_x_tr_tl=ja&_x_tr_hl=ja" title="Graphics design, UI implementation and consulting">Services</a> |
<a href="https://squareline.io/" title="UI Editor for LVGL">SquareLine Studio</a> :gb:
</p>
<br>
## :ledger: Overview
**実績**<br>
LVGL は、フリー＆オープンソースの組み込み用グラフィックスライブラリです。
あらゆるMCU、MPU、ディスプレイタイプに対応しており、美しいUI(User Interface)を実現できます。
ARM, STM32, NXP, Espressif, Nuvoton, Arduino, RT-Thread, Zephyr, NuttX, Adafruitなど、業界をリードするベンダーやプロジェクトによりサポートされています。
**機能豊富**<br>
モダンで美しいGUIを作成するための機能をすべて備えています。
30以上の組み込みウィジェット、強力なスタイルシステム、WEB由来のレイアウトマネージャ、多くの言語をサポートする文字グラフィックシステムなどです。
LVGL のシステム要件は、RAM 32KB、Flash 128KB、Cコンパイラ、フレームバッファ、1/10スクリーンサイズのレンダリング用バッファです。
**UIエディタ**<br>
SquareLine Studio は、LVGL用のプロフェッショナル＆リーズナブルなドラッグ＆ドロップ型のUIエディターです。
Windows、Linux、MacOS で動作し、ウェブサイトへの登録なしで試すことができます。
**サービス**<br>
LVGL LLC では、グラフィックデザイン、UI実装、コンサルティングサービスに対する技術サポートが可能です。GUIプロジェクトの開発において何らかのサポートが必要な場合には、お気軽にお問い合わせください。
## :rocket: 特徴
**フリー & 移植可能**
- 外部依存関係がなく、完全に移植可能な Cライブラリ。(C++互換)
- 任意の(RT)OS、任意のMCU・MPU用にコンパイル可能。
- 電子ペーパー、OLEDディスプレイ、TFTディスプレイ、白黒ディスプレイ、モニターに対応。 [Porting Guide](https://docs-lvgl-io.translate.goog/master/porting/project.html?_x_tr_sl=en&_x_tr_tl=ja&_x_tr_hl=ja)
- MITライセンスにより商用利用可能。
- システム要件：RAM 32KB、Flash 128KB、フレームバッファ、レンダリング用に1/10以上のスクリーンサイズのバッファ。
- OS、外部メモリ、GPUもサポート。
**ウィジェット、スタイル、レイアウトなど**
- 30以上の組み込み [ウィジェット](https://docs-lvgl-io.translate.goog/master/widgets/index.html?_x_tr_sl=en&_x_tr_tl=ja&_x_tr_hl=ja): ボタン、ラベル、スライダー、グラフ、キーボード、メーター、円弧、表など。
- ウィジェットの任意の部分を任意の状態にカスタマイズ可能な豊富なスタイルプロパティを備えた柔軟な [スタイルシステム](https://docs-lvgl-io.translate.goog/master/overview/style.html?_x_tr_sl=en&_x_tr_tl=ja&_x_tr_hl=ja)。
- [Flexbox](https://docs-lvgl-io.translate.goog/master/layouts/flex.html?_x_tr_sl=en&_x_tr_tl=ja&_x_tr_hl=ja) および [グリッド](https://docs-lvgl-io.translate.goog/master/layouts/grid.html?_x_tr_sl=en&_x_tr_tl=ja&_x_tr_hl=ja) 風のレイアウトエンジンにより、ウィジェットのサイズと位置を自動的に設定。
- テキスト表示(UTF-8対応)は、中国語、日本語、韓国語、タイ語、ヒンディー語、アラビア語、ペルシア語をサポート。
- ワードラッピング、カーニング、テキストスクロール、サブピクセルレンダリング、ピンイン-IME中国語入力、テキスト中の絵文字に対応。
- アニメーション、アンチエイリアシング、不透明度、スムーズスクロール、シャドウ、画像変換などをサポートするレンダリングエンジン。
- マウス、タッチパッド、キーパッド、キーボード、外部ボタン、エンコーダ等の [入力デバイス](https://docs-lvgl-io.translate.goog/master/porting/indev.html?_x_tr_sl=en&_x_tr_tl=ja&_x_tr_hl=ja) をサポート。
- [マルチディスプレイ](https://docs-lvgl-io.translate.goog/master/overview/display.html?_x_tr_sl=en&_x_tr_tl=ja&_x_tr_hl=ja) 対応。
**Binding と Build をサポート**
- [Micropython Binding](https://blog-lvgl-io.translate.goog/2019-02-20/micropython-bindings?_x_tr_sl=en&_x_tr_tl=ja&_x_tr_hl=ja) が LVGL API を公開。
- カスタムビルドシステムは使用せず、プロジェクトの他のファイルをビルドするときに、LVGLをビルド可能。
- Make と [CMake](https://docs-lvgl-io.translate.goog/master/get-started/platforms/cmake.html?_x_tr_sl=en&_x_tr_tl=ja&_x_tr_hl=ja) が含まれており、すぐ使えるようにサポート。
- [PCのシミュレータで開発したUIコード](https://docs-lvgl-io.translate.goog/master/get-started/platforms/pc-simulator.html?_x_tr_sl=en&_x_tr_tl=ja&_x_tr_hl=ja) は、そのまま組込み用ハードウェアでも使用可能。
- [Emscripten port](https://github.com/lvgl/lv_web_emscripten) :gb: によりC言語のUIコードをHTMLファイルに変換。
**ドキュメント, ツール, 技術サービス**
- [ドキュメント](https://docs-lvgl-io.translate.goog/master/index.html?_x_tr_sl=en&_x_tr_tl=ja&_x_tr_hl=ja)は[100以上の簡単なサンプルプログラム](https://github.com/lvgl/lvgl/tree/master/examples) :gb: 入り 。
- [SquareLine Studio](https://squareline.io/) :gb: - UI開発をスピードアップおよび簡素化するためのプロフェッショナルで使いやすいUIエディターソフトウェア。
- UI開発をよりシンプルかつ迅速にするための、ユーザーインターフェイスの設計、実装、コンサルティングなどの [技術サービス](https://lvgl-io.translate.goog/services?_x_tr_sl=en&_x_tr_tl=ja&_x_tr_hl=ja)。
## :package: パッケージ
LVGL は以下で利用可能です。
- [Arduino library](https://docs-lvgl-io.translate.goog/master/get-started/platforms/arduino.html?_x_tr_sl=en&_x_tr_tl=ja&_x_tr_hl=ja)
- [PlatformIO package](https://registry.platformio.org/libraries/lvgl/lvgl) :gb:
- [Zephyr library](https://docs-zephyrproject-org.translate.goog/latest/index.html?_x_tr_sl=en&_x_tr_tl=ja&_x_tr_hl=ja)
- [ESP32 component](https://docs-lvgl-io.translate.goog/master/get-started/platforms/espressif.html?_x_tr_sl=en&_x_tr_tl=ja&_x_tr_hl=ja)
- [NXP MCUXpresso component](https://www-nxp-com.translate.goog/design/software/embedded-software/lvgl-open-source-graphics-library:LITTLEVGL-OPEN-SOURCE-GRAPHICS-LIBRARY?_x_tr_sl=en&_x_tr_tl=ja&_x_tr_hl=ja)
- [NuttX library](https://docs-lvgl-io.translate.goog/master/get-started/os/nuttx.html?_x_tr_sl=en&_x_tr_tl=ja&_x_tr_hl=ja)
- [RT-Thread RTOS](https://docs-lvgl-io.translate.goog/master/get-started/os/rt-thread.html?_x_tr_sl=en&_x_tr_tl=ja&_x_tr_hl=ja)
- NXP MCUXpresso library
- CMSIS-Pack
## :robot: サンプルプログラム
ウィジェット・レイアウト・スタイルのサンプルプログラムを用意しました。
C と MicroPython のコードを選べます。
オンラインの MicroPythonエディタ へのリンクにより、サンプルプログラムの動作確認・編集もできます。
その他のサンプルプログラムは [Examples フォルダ](https://github.com/lvgl/lvgl/tree/master/examples) :gb: を確認してください。
### Button with Click Event
![ラベル付きボタンのLVGLサンプルプログラム](https://github.com/kisvegabor/test/raw/master/readme_example_1.gif)
<details>
<summary>C code</summary>
```c
lv_obj_t * btn = lv_btn_create(lv_scr_act());                   /*Add a button to the current screen*/
lv_obj_center(btn);                                     /*Set its position*/
lv_obj_set_size(btn, 100, 50);                                  /*Set its size*/
lv_obj_add_event(btn, btn_event_cb, LV_EVENT_CLICKED, NULL); /*Assign a callback to the button*/
lv_obj_t * label = lv_label_create(btn);                        /*Add a label to the button*/
lv_label_set_text(label, "Button");                             /*Set the labels text*/
lv_obj_center(label);                                           /*Align the label to the center*/
...
void btn_event_cb(lv_event_t * e)
{
  printf("Clicked\n");
}
```
</details>
<details>
<summary>MicroPython code | <a href="https://sim.lvgl.io/v8.3/micropython/ports/javascript/index.html?script_startup=https://raw.githubusercontent.com/lvgl/lvgl/0d9ab4ee0e591aad1970e3c9164fd7c544ecce70/examples/header.py&script=https://raw.githubusercontent.com/lvgl/lvgl/0d9ab4ee0e591aad1970e3c9164fd7c544ecce70/examples/widgets/slider/lv_example_slider_2.py&script_direct=926bde43ec7af0146c486de470c53f11f167491e" target="_blank">Online Simulator</a> :gb:</summary>
```python
def btn_event_cb(e):
  print("Clicked")
# Create a Button and a Label
btn = lv.btn(lv.scr_act())
btn.center()
btn.set_size(100, 50)
btn.add_event(btn_event_cb, lv.EVENT.CLICKED, None)
label = lv.label(btn)
label.set_text("Button")
label.center()
```
</details>
<br>
### Checkboxes with Layout
![Checkboxes with layout in LVGL](https://github.com/kisvegabor/test/raw/master/readme_example_2.gif)
<details>
<summary>C code</summary>
```c
lv_obj_set_flex_flow(lv_scr_act(), LV_FLEX_FLOW_COLUMN);
lv_obj_set_flex_align(lv_scr_act(), LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_START, LV_FLEX_ALIGN_CENTER);
lv_obj_t * cb;
cb = lv_checkbox_create(lv_scr_act());
lv_checkbox_set_text(cb, "Apple");
lv_obj_add_event(cb, event_handler, LV_EVENT_ALL, NULL);
cb = lv_checkbox_create(lv_scr_act());
lv_checkbox_set_text(cb, "Banana");
lv_obj_add_state(cb, LV_STATE_CHECKED);
lv_obj_add_event(cb, event_handler, LV_EVENT_ALL, NULL);
cb = lv_checkbox_create(lv_scr_act());
lv_checkbox_set_text(cb, "Lemon");
lv_obj_add_state(cb, LV_STATE_DISABLED);
lv_obj_add_event(cb, event_handler, LV_EVENT_ALL, NULL);
cb = lv_checkbox_create(lv_scr_act());
lv_obj_add_state(cb, LV_STATE_CHECKED | LV_STATE_DISABLED);
lv_checkbox_set_text(cb, "Melon\nand a new line");
lv_obj_add_event(cb, event_handler, LV_EVENT_ALL, NULL);
```
</details>
<details>
<summary>MicroPython code | <a href="https://sim.lvgl.io/v8.3/micropython/ports/javascript/index.html?script_startup=https://raw.githubusercontent.com/lvgl/lvgl/0d9ab4ee0e591aad1970e3c9164fd7c544ecce70/examples/header.py&script=https://raw.githubusercontent.com/lvgl/lvgl/0d9ab4ee0e591aad1970e3c9164fd7c544ecce70/examples/widgets/slider/lv_example_slider_2.py&script_direct=311d37e5f70daf1cb0d2cad24c7f72751b5f1792" target="_blank">Online Simulator</a> :gb:</summary>
```python
def event_handler(e):
code = e.get_code()
obj = e.get_target_obj()
if code == lv.EVENT.VALUE_CHANGED:
txt = obj.get_text()
if obj.get_state() & lv.STATE.CHECKED:
state = "Checked"
else:
state = "Unchecked"
print(txt + ":" + state)
lv.scr_act().set_flex_flow(lv.FLEX_FLOW.COLUMN)
lv.scr_act().set_flex_align(lv.FLEX_ALIGN.CENTER, lv.FLEX_ALIGN.START, lv.FLEX_ALIGN.CENTER)
cb = lv.checkbox(lv.scr_act())
cb.set_text("Apple")
cb.add_event(event_handler, lv.EVENT.ALL, None)
cb = lv.checkbox(lv.scr_act())
cb.set_text("Banana")
cb.add_state(lv.STATE.CHECKED)
cb.add_event(event_handler, lv.EVENT.ALL, None)
cb = lv.checkbox(lv.scr_act())
cb.set_text("Lemon")
cb.add_state(lv.STATE.DISABLED)
cb.add_event(event_handler, lv.EVENT.ALL, None)
cb = lv.checkbox(lv.scr_act())
cb.add_state(lv.STATE.CHECKED | lv.STATE.DISABLED)
cb.set_text("Melon")
cb.add_event(event_handler, lv.EVENT.ALL, None)
```
</details>
<br>
### Styling a Slider
![Styling a slider with LVGL](https://github.com/kisvegabor/test/raw/master/readme_example_3.gif)
<details>
<summary>C code</summary>
```c
lv_obj_t * slider = lv_slider_create(lv_scr_act());
lv_slider_set_value(slider, 70, LV_ANIM_OFF);
lv_obj_set_size(slider, 300, 20);
lv_obj_center(slider);
/*Add local styles to MAIN part (background rectangle)*/
lv_obj_set_style_bg_color(slider, lv_color_hex(0x0F1215), LV_PART_MAIN);
lv_obj_set_style_bg_opa(slider, 255, LV_PART_MAIN);
lv_obj_set_style_border_color(slider, lv_color_hex(0x333943), LV_PART_MAIN);
lv_obj_set_style_border_width(slider, 5, LV_PART_MAIN);
lv_obj_set_style_pad_all(slider, 5, LV_PART_MAIN);
/*Create a reusable style sheet for the INDICATOR part*/
static lv_style_t style_indicator;
lv_style_init(&style_indicator);
lv_style_set_bg_color(&style_indicator, lv_color_hex(0x37B9F5));
lv_style_set_bg_grad_color(&style_indicator, lv_color_hex(0x1464F0));
lv_style_set_bg_grad_dir(&style_indicator, LV_GRAD_DIR_HOR);
lv_style_set_shadow_color(&style_indicator, lv_color_hex(0x37B9F5));
lv_style_set_shadow_width(&style_indicator, 15);
lv_style_set_shadow_spread(&style_indicator, 5);
/*Add the style sheet to the slider's INDICATOR part*/
lv_obj_add_style(slider, &style_indicator, LV_PART_INDICATOR);
/*Add the same style to the KNOB part too and locally overwrite some properties*/
lv_obj_add_style(slider, &style_indicator, LV_PART_KNOB);
lv_obj_set_style_outline_color(slider, lv_color_hex(0x0096FF), LV_PART_KNOB);
lv_obj_set_style_outline_width(slider, 3, LV_PART_KNOB);
lv_obj_set_style_outline_pad(slider, -5, LV_PART_KNOB);
lv_obj_set_style_shadow_spread(slider, 2, LV_PART_KNOB);
```
</details>
<details>
<summary>MicroPython code |
<a href="https://sim.lvgl.io/v8.3/micropython/ports/javascript/index.html?script_startup=https://raw.githubusercontent.com/lvgl/lvgl/0d9ab4ee0e591aad1970e3c9164fd7c544ecce70/examples/header.py&script=https://raw.githubusercontent.com/lvgl/lvgl/0d9ab4ee0e591aad1970e3c9164fd7c544ecce70/examples/widgets/slider/lv_example_slider_2.py&script_direct=c431c7b4dfd2cc0dd9c392b74365d5af6ea986f0" target="_blank">Online Simulator</a> :gb:
</summary>
```python
# Create a slider and add the style
slider = lv.slider(lv.scr_act())
slider.set_value(70, lv.ANIM.OFF)
slider.set_size(300, 20)
slider.center()
# Add local styles to MAIN part (background rectangle)
slider.set_style_bg_color(lv.color_hex(0x0F1215), lv.PART.MAIN)
slider.set_style_bg_opa(255, lv.PART.MAIN)
slider.set_style_border_color(lv.color_hex(0x333943), lv.PART.MAIN)
slider.set_style_border_width(5, lv.PART.MAIN)
slider.set_style_pad_all(5, lv.PART.MAIN)
# Create a reusable style sheet for the INDICATOR part
style_indicator = lv.style_t()
style_indicator.init()
style_indicator.set_bg_color(lv.color_hex(0x37B9F5))
style_indicator.set_bg_grad_color(lv.color_hex(0x1464F0))
style_indicator.set_bg_grad_dir(lv.GRAD_DIR.HOR)
style_indicator.set_shadow_color(lv.color_hex(0x37B9F5))
style_indicator.set_shadow_width(15)
style_indicator.set_shadow_spread(5)
# Add the style sheet to the slider's INDICATOR part
slider.add_style(style_indicator, lv.PART.INDICATOR)
slider.add_style(style_indicator, lv.PART.KNOB)
# Add the same style to the KNOB part too and locally overwrite some properties
slider.set_style_outline_color(lv.color_hex(0x0096FF), lv.PART.KNOB)
slider.set_style_outline_width(3, lv.PART.KNOB)
slider.set_style_outline_pad(-5, lv.PART.KNOB)
slider.set_style_shadow_spread(2, lv.PART.KNOB)
```
</details>
<br>
### English, Hebrew (mixed LRT-RTL) and Chinese texts
![English, Hebrew and Chinese texts with LVGL](https://github.com/kisvegabor/test/raw/master/readme_example_4.png)
<details>
<summary>C code</summary>
```c
lv_obj_t * ltr_label = lv_label_create(lv_scr_act());
lv_label_set_text(ltr_label, "In modern terminology, a microcontroller is similar to a system on a chip (SoC).");
lv_obj_set_style_text_font(ltr_label, &lv_font_montserrat_16, 0);
lv_obj_set_width(ltr_label, 310);
lv_obj_align(ltr_label, LV_ALIGN_TOP_LEFT, 5, 5);
lv_obj_t * rtl_label = lv_label_create(lv_scr_act());
lv_label_set_text(rtl_label,"מעבד, או בשמו המלא יחידת עיבוד מרכזית (באנגלית: CPU - Central Processing Unit).");
lv_obj_set_style_base_dir(rtl_label, LV_BASE_DIR_RTL, 0);
lv_obj_set_style_text_font(rtl_label, &lv_font_dejavu_16_persian_hebrew, 0);
lv_obj_set_width(rtl_label, 310);
lv_obj_align(rtl_label, LV_ALIGN_LEFT_MID, 5, 0);
lv_obj_t * cz_label = lv_label_create(lv_scr_act());
lv_label_set_text(cz_label,
"嵌入式系统（Embedded System），\n是一种嵌入机械或电气系统内部、具有专一功能和实时计算性能的计算机系统。");
lv_obj_set_style_text_font(cz_label, &lv_font_simsun_16_cjk, 0);
lv_obj_set_width(cz_label, 310);
lv_obj_align(cz_label, LV_ALIGN_BOTTOM_LEFT, 5, -5);
```
</details>
<details>
<summary>MicroPython code | <a href="https://sim.lvgl.io/v8.3/micropython/ports/javascript/index.html?script_startup=https://raw.githubusercontent.com/lvgl/lvgl/0d9ab4ee0e591aad1970e3c9164fd7c544ecce70/examples/header.py&script=https://raw.githubusercontent.com/lvgl/lvgl/0d9ab4ee0e591aad1970e3c9164fd7c544ecce70/examples/widgets/slider/lv_example_slider_2.py&script_direct=18bb38200a64e10ead1aa17a65c977fc18131842" target="_blank">Online Simulator</a> :gb:</summary>
```python
ltr_label = lv.label(lv.scr_act())
ltr_label.set_text("In modern terminology, a microcontroller is similar to a system on a chip (SoC).")
ltr_label.set_style_text_font(lv.font_montserrat_16, 0);
ltr_label.set_width(310)
ltr_label.align(lv.ALIGN.TOP_LEFT, 5, 5)
rtl_label = lv.label(lv.scr_act())
rtl_label.set_text("מעבד, או בשמו המלא יחידת עיבוד מרכזית (באנגלית: CPU - Central Processing Unit).")
rtl_label.set_style_base_dir(lv.BASE_DIR.RTL, 0)
rtl_label.set_style_text_font(lv.font_dejavu_16_persian_hebrew, 0)
rtl_label.set_width(310)
rtl_label.align(lv.ALIGN.LEFT_MID, 5, 0)
font_simsun_16_cjk = lv.font_load("S:../../assets/font/lv_font_simsun_16_cjk.fnt")
cz_label = lv.label(lv.scr_act())
cz_label.set_style_text_font(font_simsun_16_cjk, 0)
cz_label.set_text("嵌入式系统（Embedded System），\n是一种嵌入机械或电气系统内部、具有专一功能和实时计算性能的计算机系统。")
cz_label.set_width(310)
cz_label.align(lv.ALIGN.BOTTOM_LEFT, 5, -5)
```
</details>
## :arrow_forward: はじめに
LVGLを使い始める時は、以下の順に進める事をおすすめします。
**LVGLに触れてみましょう**
1. LVGLの動きを [オンラインデモ](https://lvgl-io.translate.goog/demos?_x_tr_sl=en&_x_tr_tl=ja&_x_tr_hl=ja) で確認しましょう。 (3分間)
2. ドキュメントの [Introduction](https://docs-lvgl-io.translate.goog/master/intro/index.html?_x_tr_sl=en&_x_tr_tl=ja&_x_tr_hl=ja) を読みましょう。 (5分間)
3. LVGLの基本に慣れるため [Quick overview](https://docs-lvgl-io.translate.goog/master/get-started/quick-overview.html?_x_tr_sl=en&_x_tr_tl=ja&_x_tr_hl=ja) を読みましょう。 (15分間)
**LVGLを使ってみましょう**
4. [シミュレータ](https://docs-lvgl-io.translate.goog/master/get-started/platforms/pc-simulator.html?_x_tr_sl=en&_x_tr_tl=ja&_x_tr_hl=ja) をセットアップしましょう。 (10 minutes)
5. [サンプルプログラム](https://github.com/lvgl/lvgl/tree/master/examples) :gb: を動かしてみましょう。
6. [移植ガイド](https://docs-lvgl-io.translate.goog/master/porting/index.html?_x_tr_sl=en&_x_tr_tl=ja&_x_tr_hl=ja) を参考に、LVGLを開発ボードに移植してみましょう。すぐ使える形の [プロジェクト](https://github.com/lvgl?q=lv_port_) :gb: も用意してあります。
**より詳しく体験してみましょう**
7. ライブラリの理解を深めるため [Overview](https://docs-lvgl-io.translate.goog/master/overview/index.html?_x_tr_sl=en&_x_tr_tl=ja&_x_tr_hl=ja) を読みましょう。 (2～3時間)
8. ウィジェットの機能や使い方の詳細は [Widgets](https://docs-lvgl-io.translate.goog/master/widgets/index.html?_x_tr_sl=en&_x_tr_tl=ja&_x_tr_hl=ja) でご確認ください。
**助け合いましょう**
9. 質問がある場合は [Forum](http://forum.lvgl.io/) :gb: で質問して下さい。
10. LVGLの改善への協力は大歓迎です。詳細は [Contributing guide](https://docs-lvgl-io.translate.goog/master/CONTRIBUTING.html?_x_tr_sl=en&_x_tr_tl=ja&_x_tr_hl=ja) をご覧ください。 (15分間)
**さらに理解を深めましょう**
11. [SquareLine Studio](https://squareline.io/) :gb: をダウンロードして試用してみましょう。
12. 技術的サポートが必要であれば、[技術サービス](https://lvgl.io/services) :gb: に問い合わせて下さい。
## :handshake: 技術サービス
[LVGL LLC](https://www.digikey.com/en/design-services-providers/lvgl-kft) は、LVGLライブラリの確かな背景を元に、UI開発のための様々な技術サービスを提供するために設立されました。 UIとグラフィックス業界における15年以上の実績を活かし、UIを次のレベルに引き上げるお手伝いを致します。
- **グラフィックデザイン** 当社のグラフィックデザイナーは、製品とハードウェアのリソースに合わせて美しくモダンなデザインにするエキスパートです。
- **UI実装** お客様または弊社で作成したデザインを元に、UIを実装することも可能です。お客様のハードウェアとLVGLを最大限に活用することをお約束します。
LVGLにない機能やウィジェットは、私たちが実装しますのでご安心ください。
- **コンサルタント＆技術サポート** UI開発において、価格と時間を要する作業でのリスクを減らすため、コンサルティングも含めてサポート致します。
- **Board certification** development board または production ready kit を提供している企業に対しては、ボードがLVGLを実行できるようにするためのボード認定を行います。
サンプルは [Demos](https://lvgl-io.translate.goog/demos?_x_tr_sl=en&_x_tr_tl=ja&_x_tr_hl=ja) をご覧ください。
詳しくは [Services page](https://lvgl-io.translate.goog/services?_x_tr_sl=en&_x_tr_tl=ja&_x_tr_hl=ja) をご覧ください。
お問い合わせは [問い合わせフォーム](https://lvgl.io/#contact) :gb: より送信して下さい。
## :star2: 協力
LVGLはオープンプロジェクトであり、協力は大歓迎です。
色々な方法で協力できます。
協力方法の例
- LVGLを使用した作品やプロジェクトの公表
- サンプルプログラムの作成
- ドキュメントの改善
- バグの修正
協力方法の詳細については、ドキュメントの [Contributing section](https://docs-lvgl-io.translate.goog/master/CONTRIBUTING.html?_x_tr_sl=en&_x_tr_tl=ja&_x_tr_hl=ja) をご覧ください。
すでに 300人以上がLVGLに足跡を残しています。いっしょに活動しましょう! :slightly_smiling_face:
<a href="https://github.com/lvgl/lvgl/graphs/contributors">
<img src="https://contrib.rocks/image?repo=lvgl/lvgl&max=48" />
</a>
... and many other.
docs/README_jp.rst.back
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**NOTA IMPORTANTE** A próxima versão principal (v9.0.0) está sendo desenvolvida na branch master.
A última versão estável está disponível na branch [release/v8.3](https://github.com/lvgl/lvgl/tree/release/v8.3).
---
<a href="https://opencollective.com/lvgl" target="_blank"><img align="left" src="https://lvgl.io/assets/images/sponsor.png" height="32px"></a>
<p align="right">
<a href="../README.md">English</a> |
<a href="./README_zh.md">中文</a> |
<b>Português do Brasil</b> |
<a href="./README_jp.md">日本語</a>
</p>
<p align="center">
  <img src="https://lvgl.io/assets/images/logo_lvgl.png">
</p>
  <h1 align="center">LVGL - Biblioteca gráfica leve e versátil</h1>
  <br>
<div align="center">
<img src="https://github.com/kisvegabor/test/raw/master/smartwatch_demo.gif">
&nbsp;
  <img border="1px" src="https://lvgl.io/assets/images/lvgl_widgets_demo.gif">
</div>
<br>
<p align="center">
  <a href="https://lvgl.io" title="Página inicial do LVGL">Site</a> |
  <a href="https://docs.lvgl.io/" title="Documentação detalhada com +100 exemplos">Documentação</a> |
  <a href="https://forum.lvgl.io" title="Obtenha ajuda e ajude outras pessoas">Fórum</a> |
  <a href="https://lvgl.io/services" title="Design gráfico, implementações e consultoria de serviços">Serviços</a> |
  <a href="https://lvgl.io/demos" title="Execute demonstrações no seu navegador">Demonstrações</a> |
  <a href="https://squareline.io/" title="Editor web para LVGL">Editor SquareLine Studio</a>
</p>
<br>
## :monocle_face: Visão Geral
**Maduro e popular**
LVGL é a biblioteca gráfica incorporada gratuita e de código aberto mais popular para criar belas interfaces de usuário para qualquer display do tipo MCU, MPU. Ela é suportada por fornecedores e projetos líderes do setor, como ARM, STM32, NXP, Espressif, Nuvoton, Arduino, RT-Thread, Zephyr, NuttX, Adafruit e muitos outros.
**Rico em recursos**
Ela tem todos os recursos para a criação de GUIs modernas e bonitas: mais de 30 widgets integrados, um sistema de design poderoso, gerenciadores de layout inspirados na web e um sistema de tipografia com suporte para vários idiomas. Para integrar o LVGL em sua plataforma, tudo que você precisa é de pelo menos 32kB de RAM e 128kB de Flash, um compilador C, um frame buffer e pelo menos uma tela de tamanho 1/10 para renderização.
**Editor UI profissional**
SquareLine Studio é um editor de interface do usuário de (arrasta e solta) profissional para LVGL. Ele roda em Windows, Linux e MacOS também e você pode experimentá-lo sem se registrar no site.
**Serviços**
Nossa equipe está pronta para ajudá-lo com design gráfico, implementação de UI e serviços de consultoria. Entre em contato conosco se precisar de algum suporte durante o desenvolvimento de seu próximo projeto de GUI.
## :rocket: Recursos
**Gratuito e portátil**
- Uma biblioteca C totalmente portátil (compatível com C++) sem dependências externas.
- Pode ser compilado para qualquer display MCU ou MPU, e qualquer sistema operacional de tempo real (RT-OS).
- Suporta monitores monocromáticos, ePaper, OLED ou TFT. [Guia de portabilidade](https://docs.lvgl.io/master/porting/project.html)
- Distribuído sob a licença do MIT, para que você também possa usá-lo facilmente em projetos comerciais.
- Precisa de apenas 32 kB de RAM e 128 kB de Flash, um frame buffer e pelo menos uma tela de tamanho 1/10 para renderização.
- Sistemas operacionais, memória externa e GPU são suportados, mas não obrigatórios.
**Widgets, designs, layouts e muito mais**
- Mais de 30 widgets integrados: botão, etiqueta (label), controle deslizante (slider), gráfico (chart), teclado, medidor (meter), tabelas e muito mais.
- Sistema de design flexível com pelo menos 100 propriedades de estilo para personalizar qualquer parte dos widgets.
- Mecanismos de layouts Flexbox e Grid para dimensionar e posicionar automaticamente os widgets de maneira responsiva.
- Os textos são renderizados com codificação UTF-8, suportando sistemas de escrita CJK (chinês, japonês e coreano), tailandês, hindi, árabe e persa.
- Quebra de palavras (word wrapping), espaçamento entre letras (kerning), rolagem de texto (scrolling), renderização subpixel, entrada em chinês Pinyin-IME e emojis.
- Mecanismo de renderização que suporta animações, anti-aliasing, opacidade, rolagem suave (smooth scroll), sombras, transformação de imagens, etc.
- Suporta mouse, touchpad, teclado, botões externos, dispositivos de entrada codificadores (encoders).
- Suporta vários monitores.
**Suporte de vinculação (binding) e compilação de arquivos**
- Exposição da API do LVGL com o [Micropython](https://blog.lvgl.io/2019-02-20/micropython-bindings)
- Nenhum sistema de compilação personalizado é usado. Você pode construir o LVGL enquanto constrói os outros arquivos do seu projeto.
- O suporte para Make e [CMake](https://docs.lvgl.io/master/get-started/platforms/cmake.html) já vem incluído.
- [Desenvolva no PC](https://docs.lvgl.io/master/get-started/platforms/pc-simulator.html) e use o mesmo código de interface do usuário em hardwares incorporados (embedded hardware).
- Converta o código C para um arquivo HTML com o [Emscripten port](https://github.com/lvgl/lv_web_emscripten).
**Documentação, ferramentas e serviços**
- Documentação detalhada com [+100 exemplos simples](https://docs.lvgl.io/master/index.html)
- [SquareLine Studio](https://squareline.io) - Um software editor UI profissional e fácil de usar, para acelerar e simplificar o desenvolvimento da interface do usuário.
- [Serviços](https://lvgl.io/services) como design de UI, implementação e consultoria para tornar o desenvolvimento de UI mais simples e rápido.
## :heart: Patrocinador
Se o LVGL economizou muito tempo e dinheiro ou você apenas se divertiu ao usá-lo, considere Apoiar o desenvolvimento.
**Como e com o que utilizamos os recursos doados?**
Nosso objetivo é fornecer compensação financeira para as pessoas que mais fazem pelo LVGL. Isso significa que não apenas os mantenedores, mas qualquer pessoa que implemente um ótimo recurso deve receber um pagamento com o dinheiro acumulado. Usamos as doações para cobrir nossos custos operacionais, como servidores e serviços relacionados.
**Como doar?**
Usamos o [Open Collective](https://opencollective.com/lvgl), onde você pode enviar facilmente doações únicas ou recorrentes. Você também pode ver todas as nossas despesas de forma transparente.
**Como receber o pagamento de sua contribuição?**
Se alguém implementar ou corrigir um problema rotulado como [Patrocinado](https://github.com/lvgl/lvgl/labels/Sponsored), essa pessoa receberá um pagamento por esse trabalho. Estimamos o tempo necessário, a complexidade e a importância da questão e definimos um preço de acordo. Para entrar, apenas comente sobre um problema patrocinado dizendo "Olá, gostaria de lidar com isso. É assim que estou planejando corrigi-lo/implementá-lo...". Um trabalho é considerado pronto quando é aprovado e mesclado por um mantenedor. Depois disso, você pode enviar uma "despesa" (expense) pela plataforma [opencollective.com](https://opencollective.com/lvgl) e então receberá o pagamento em alguns dias.
**Organizações que apoiam o projeto LVGL**<br>
[![Patrocinadores do LVGL](https://opencollective.com/lvgl/organizations.svg?width=600)](https://opencollective.com/lvgl)
**Pessoas que apoiam o projeto LVGL**<br>
[![Backers of LVGL](https://opencollective.com/lvgl/individuals.svg?width=600)](https://opencollective.com/lvgl)
## :package: Pacotes
LVGL está disponível para:
- [Arduino library](https://docs.lvgl.io/master/get-started/platforms/arduino.html)
- [PlatformIO package](https://registry.platformio.org/libraries/lvgl/lvgl)
- [Zephyr library](https://docs.zephyrproject.org/latest/kconfig.html#CONFIG_LVGL)
- [ESP32 component](https://docs.lvgl.io/master/get-started/platforms/espressif.html)
- [NXP MCUXpresso component](https://www.nxp.com/design/software/embedded-software/lvgl-open-source-graphics-library:LITTLEVGL-OPEN-SOURCE-GRAPHICS-LIBRARY)
- [NuttX library](https://docs.lvgl.io/master/get-started/os/nuttx.html)
- [RT-Thread RTOS](https://docs.lvgl.io/master/get-started/os/rt-thread.html)
- NXP MCUXpresso library
- CMSIS-Pack
## :man_technologist: Exemplos
Veja como criar um botão com um evento de clique em C e MicroPython. Para mais exemplos, veja a pasta [examples](https://github.com/lvgl/lvgl/tree/master/examples).
![LVGL button with label example](https://github.com/lvgl/lvgl/raw/master/docs/misc/btn_example.png)
### Botão com evento de clique
![Botão LVGL com exemplo de rótulo (label)](https://github.com/kisvegabor/test/raw/master/readme_example_1.gif)
<details>
<summary>Código C</summary>
```c
lv_obj_t * btn = lv_btn_create(lv_scr_act());                   /* Adiciona o botão a tela atual */
lv_obj_center(btn);                                     /* Define a posição do botão */
lv_obj_set_size(btn, 100, 50);                                  /* Define o tamanho do botão */
lv_obj_add_event(btn, btn_event_cb, LV_EVENT_CLICKED, NULL); /* Atribui um retorno de chamada (callback) ao botão */
lv_obj_t * label = lv_label_create(btn);                        /* Adiciona um rótulo (label) */
lv_label_set_text(label, "Botão");                             /* Define um texto para o rótulo (label) */
lv_obj_center(label);                                           /* Alinha o texto no centro do botão */
...
void btn_event_cb(lv_event_t * e)
{
  printf("Clicado\n");
}
```
</details>
<details>
<summary>Código MicroPython | <a href="https://sim.lvgl.io/v8.3/micropython/ports/javascript/index.html?script_startup=https://raw.githubusercontent.com/lvgl/lvgl/0d9ab4ee0e591aad1970e3c9164fd7c544ecce70/examples/header.py&script=https://raw.githubusercontent.com/lvgl/lvgl/0d9ab4ee0e591aad1970e3c9164fd7c544ecce70/examples/widgets/slider/lv_example_slider_2.py&script_direct=926bde43ec7af0146c486de470c53f11f167491e" target="_blank">Simulador online</a></summary>
```python
def btn_event_cb(e):
  print("Clicado")
# Cria um botão e um rótulo (label)
btn = lv.btn(lv.scr_act())
btn.center()
btn.set_size(100, 50)
btn.add_event(btn_event_cb, lv.EVENT.CLICKED, None)
label = lv.label(btn)
label.set_text("Botão")
label.center()
```
</details>
<br>
### Caixas de seleção (chackboxes) com layout
![Caixas de seleção (chackboxes) com layout no LVGL](https://github.com/kisvegabor/test/raw/master/readme_example_2.gif)
<details>
<summary>Código em C</summary>
```c
lv_obj_set_flex_flow(lv_scr_act(), LV_FLEX_FLOW_COLUMN);
lv_obj_set_flex_align(lv_scr_act(), LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_START, LV_FLEX_ALIGN_CENTER);
lv_obj_t * cb;
cb = lv_checkbox_create(lv_scr_act());
lv_checkbox_set_text(cb, "Maça");
lv_obj_add_event(cb, event_handler, LV_EVENT_ALL, NULL);
cb = lv_checkbox_create(lv_scr_act());
lv_checkbox_set_text(cb, "Banana");
lv_obj_add_state(cb, LV_STATE_CHECKED);
lv_obj_add_event(cb, event_handler, LV_EVENT_ALL, NULL);
cb = lv_checkbox_create(lv_scr_act());
lv_checkbox_set_text(cb, "Limão");
lv_obj_add_state(cb, LV_STATE_DISABLED);
lv_obj_add_event(cb, event_handler, LV_EVENT_ALL, NULL);
cb = lv_checkbox_create(lv_scr_act());
lv_obj_add_state(cb, LV_STATE_CHECKED | LV_STATE_DISABLED);
lv_checkbox_set_text(cb, "Melão\ne uma nova linha");
lv_obj_add_event(cb, event_handler, LV_EVENT_ALL, NULL);
```
</details>
<details>
<summary>Código MicroPython | <a href="https://sim.lvgl.io/v8.3/micropython/ports/javascript/index.html?script_startup=https://raw.githubusercontent.com/lvgl/lvgl/0d9ab4ee0e591aad1970e3c9164fd7c544ecce70/examples/header.py&script=https://raw.githubusercontent.com/lvgl/lvgl/0d9ab4ee0e591aad1970e3c9164fd7c544ecce70/examples/widgets/slider/lv_example_slider_2.py&script_direct=311d37e5f70daf1cb0d2cad24c7f72751b5f1792" target="_blank">Online Simulator</a></summary>
```python
def event_handler(e):
code = e.get_code()
obj = e.get_target_obj()
if code == lv.EVENT.VALUE_CHANGED:
txt = obj.get_text()
if obj.get_state() & lv.STATE.CHECKED:
state = "Marcador"
else:
state = "Desmarcado"
print(txt + ":" + state)
lv.scr_act().set_flex_flow(lv.FLEX_FLOW.COLUMN)
lv.scr_act().set_flex_align(lv.FLEX_ALIGN.CENTER, lv.FLEX_ALIGN.START, lv.FLEX_ALIGN.CENTER)
cb = lv.checkbox(lv.scr_act())
cb.set_text("Maça")
cb.add_event(event_handler, lv.EVENT.ALL, None)
cb = lv.checkbox(lv.scr_act())
cb.set_text("Banana")
cb.add_state(lv.STATE.CHECKED)
cb.add_event(event_handler, lv.EVENT.ALL, None)
cb = lv.checkbox(lv.scr_act())
cb.set_text("Limão")
cb.add_state(lv.STATE.DISABLED)
cb.add_event(event_handler, lv.EVENT.ALL, None)
cb = lv.checkbox(lv.scr_act())
cb.add_state(lv.STATE.CHECKED | lv.STATE.DISABLED)
cb.set_text("Melão")
cb.add_event(event_handler, lv.EVENT.ALL, None)
```
</details>
<br>
### Estilizando um controle deslizante (slider)
![Estilizando um controle deslizante (slider) com LVGL](https://github.com/kisvegabor/test/raw/master/readme_example_3.gif)
<details>
<summary>Código C</summary>
```c
lv_obj_t * slider = lv_slider_create(lv_scr_act());
lv_slider_set_value(slider, 70, LV_ANIM_OFF);
lv_obj_set_size(slider, 300, 20);
lv_obj_center(slider);
/* Adiciona estilos locais à parte MAIN (retângulo de fundo) */
lv_obj_set_style_bg_color(slider, lv_color_hex(0x0F1215), LV_PART_MAIN);
lv_obj_set_style_bg_opa(slider, 255, LV_PART_MAIN);
lv_obj_set_style_border_color(slider, lv_color_hex(0x333943), LV_PART_MAIN);
lv_obj_set_style_border_width(slider, 5, LV_PART_MAIN);
lv_obj_set_style_pad_all(slider, 5, LV_PART_MAIN);
/* Crie uma folha de estilo reutilizável para a parte do (INDICADOR) */
static lv_style_t style_indicator;
lv_style_init(&style_indicator);
lv_style_set_bg_color(&style_indicator, lv_color_hex(0x37B9F5));
lv_style_set_bg_grad_color(&style_indicator, lv_color_hex(0x1464F0));
lv_style_set_bg_grad_dir(&style_indicator, LV_GRAD_DIR_HOR);
lv_style_set_shadow_color(&style_indicator, lv_color_hex(0x37B9F5));
lv_style_set_shadow_width(&style_indicator, 15);
lv_style_set_shadow_spread(&style_indicator, 5);
/* Adicione a folha de estilo à parte do INDICATOR do controle deslizante (slider) */
lv_obj_add_style(slider, &style_indicator, LV_PART_INDICATOR);
/* Adicione o mesmo estilo à parte do KNOB e sobrescreva localmente algumas propriedades */
lv_obj_add_style(slider, &style_indicator, LV_PART_KNOB);
lv_obj_set_style_outline_color(slider, lv_color_hex(0x0096FF), LV_PART_KNOB);
lv_obj_set_style_outline_width(slider, 3, LV_PART_KNOB);
lv_obj_set_style_outline_pad(slider, -5, LV_PART_KNOB);
lv_obj_set_style_shadow_spread(slider, 2, LV_PART_KNOB);
```
</details>
<details>
<summary>Código MicroPython |
<a href="https://sim.lvgl.io/v8.3/micropython/ports/javascript/index.html?script_startup=https://raw.githubusercontent.com/lvgl/lvgl/0d9ab4ee0e591aad1970e3c9164fd7c544ecce70/examples/header.py&script=https://raw.githubusercontent.com/lvgl/lvgl/0d9ab4ee0e591aad1970e3c9164fd7c544ecce70/examples/widgets/slider/lv_example_slider_2.py&script_direct=c431c7b4dfd2cc0dd9c392b74365d5af6ea986f0" target="_blank">Simulador online</a>
</summary>
```python
# Crie um controle deslizante (slider) e adicione o estilo
slider = lv.slider(lv.scr_act())
slider.set_value(70, lv.ANIM.OFF)
slider.set_size(300, 20)
slider.center()
# Adicione estilos locais à parte MAIN (retângulo de fundo)
slider.set_style_bg_color(lv.color_hex(0x0F1215), lv.PART.MAIN)
slider.set_style_bg_opa(255, lv.PART.MAIN)
slider.set_style_border_color(lv.color_hex(0x333943), lv.PART.MAIN)
slider.set_style_border_width(5, lv.PART.MAIN)
slider.set_style_pad_all(5, lv.PART.MAIN)
# Crie uma folha de estilo reutilizável para a parte do INDICATOR
style_indicator = lv.style_t()
style_indicator.init()
style_indicator.set_bg_color(lv.color_hex(0x37B9F5))
style_indicator.set_bg_grad_color(lv.color_hex(0x1464F0))
style_indicator.set_bg_grad_dir(lv.GRAD_DIR.HOR)
style_indicator.set_shadow_color(lv.color_hex(0x37B9F5))
style_indicator.set_shadow_width(15)
style_indicator.set_shadow_spread(5)
# Adicione a folha de estilo à parte do INDICATOR do controle deslizante (slider)
slider.add_style(style_indicator, lv.PART.INDICATOR)
slider.add_style(style_indicator, lv.PART.KNOB)
# Adicione o mesmo estilo à parte do KNOB e sobrescreva localmente algumas propriedades
slider.set_style_outline_color(lv.color_hex(0x0096FF), lv.PART.KNOB)
slider.set_style_outline_width(3, lv.PART.KNOB)
slider.set_style_outline_pad(-5, lv.PART.KNOB)
slider.set_style_shadow_spread(2, lv.PART.KNOB)
```
</details>
<br>
### Textos em inglês, hebraico (LRT-RTL misto) e chinês
![Textos em inglês, hebraico (LRT-RTL misto) e chinês com LVGL](https://github.com/kisvegabor/test/raw/master/readme_example_4.png)
<details>
<summary>Código C</summary>
```c
lv_obj_t * ltr_label = lv_label_create(lv_scr_act());
lv_label_set_text(ltr_label, "In modern terminology, a microcontroller is similar to a system on a chip (SoC).");
lv_obj_set_style_text_font(ltr_label, &lv_font_montserrat_16, 0);
lv_obj_set_width(ltr_label, 310);
lv_obj_align(ltr_label, LV_ALIGN_TOP_LEFT, 5, 5);
lv_obj_t * rtl_label = lv_label_create(lv_scr_act());
lv_label_set_text(rtl_label,"מעבד, או בשמו המלא יחידת עיבוד מרכזית (באנגלית: CPU - Central Processing Unit).");
lv_obj_set_style_base_dir(rtl_label, LV_BASE_DIR_RTL, 0);
lv_obj_set_style_text_font(rtl_label, &lv_font_dejavu_16_persian_hebrew, 0);
lv_obj_set_width(rtl_label, 310);
lv_obj_align(rtl_label, LV_ALIGN_LEFT_MID, 5, 0);
lv_obj_t * cz_label = lv_label_create(lv_scr_act());
lv_label_set_text(cz_label,
"嵌入式系统（Embedded System），\n是一种嵌入机械或电气系统内部、具有专一功能和实时计算性能的计算机系统。");
lv_obj_set_style_text_font(cz_label, &lv_font_simsun_16_cjk, 0);
lv_obj_set_width(cz_label, 310);
lv_obj_align(cz_label, LV_ALIGN_BOTTOM_LEFT, 5, -5);
```
</details>
<details>
<summary>Código MicroPython | <a href="https://sim.lvgl.io/v8.3/micropython/ports/javascript/index.html?script_startup=https://raw.githubusercontent.com/lvgl/lvgl/0d9ab4ee0e591aad1970e3c9164fd7c544ecce70/examples/header.py&script=https://raw.githubusercontent.com/lvgl/lvgl/0d9ab4ee0e591aad1970e3c9164fd7c544ecce70/examples/widgets/slider/lv_example_slider_2.py&script_direct=18bb38200a64e10ead1aa17a65c977fc18131842" target="_blank">Simulador online</a></summary>
```python
ltr_label = lv.label(lv.scr_act())
ltr_label.set_text("In modern terminology, a microcontroller is similar to a system on a chip (SoC).")
ltr_label.set_style_text_font(lv.font_montserrat_16, 0);
ltr_label.set_width(310)
ltr_label.align(lv.ALIGN.TOP_LEFT, 5, 5)
rtl_label = lv.label(lv.scr_act())
rtl_label.set_text("מעבד, או בשמו המלא יחידת עיבוד מרכזית (באנגלית: CPU - Central Processing Unit).")
rtl_label.set_style_base_dir(lv.BASE_DIR.RTL, 0)
rtl_label.set_style_text_font(lv.font_dejavu_16_persian_hebrew, 0)
rtl_label.set_width(310)
rtl_label.align(lv.ALIGN.LEFT_MID, 5, 0)
font_simsun_16_cjk = lv.font_load("S:../../assets/font/lv_font_simsun_16_cjk.fnt")
cz_label = lv.label(lv.scr_act())
cz_label.set_style_text_font(font_simsun_16_cjk, 0)
cz_label.set_text("嵌入式系统（Embedded System），\n是一种嵌入机械或电气系统内部、具有专一功能和实时计算性能的计算机系统。")
cz_label.set_width(310)
cz_label.align(lv.ALIGN.BOTTOM_LEFT, 5, -5)
```
</details>
## :arrow_forward: Começando
Esta lista irá guiá-lo para começar com o LVGL passo a passo.
**Familiarize-se com o LVGL**
1. Confira as [demos on-line](https://lvgl.io/demos) para ver o LVGL em ação (~3 minutos)
2. Leia a página de [introdução](https://docs.lvgl.io/master/intro/index.html) da documentação (~5 minutos)
3. Familiarize-se com o básico na página de [visão geral rápida](https://docs.lvgl.io/master/get-started/quick-overview.html) (~15 minutos)
**Começando a usar o LVGL**
4. Configure um [simulador](https://docs.lvgl.io/master/get-started/platforms/pc-simulator.html) (~10 minutos)
5. Experimente alguns [exemplos](https://github.com/lvgl/lvgl/tree/master/examples)
6. Porte o LVGL para uma placa. Veja o guia [portando o LVGL](https://docs.lvgl.io/master/porting/index.html) ou veja um projeto pronto para usar em [projetos](https://github.com/lvgl?q=lv_port_)
**Torne-se um profissional**
7. Leia a página [visão geral](https://docs.lvgl.io/master/overview/index.html) para entender melhor a biblioteca (~2-3 horas)
8. Verifique a documentação dos [widgets](https://docs.lvgl.io/master/widgets/index.html) para ver seus recursos e usabilidade
**Obtenha ajuda e ajude outras pessoas**
9. Se você tiver dúvidas, acesse o [Fórum](http://forum.lvgl.io)
10. Leia o guia de [contribuição](https://docs.lvgl.io/master/CONTRIBUTING.html) para ver como você pode ajudar a melhorar o LVGL (~15 minutos)
**E mais**
11. Baixe e experimente o editor [SquareLine Studio](https://squareline.io).
12. Entre em contato conosco para [serviços e consultoria](https://lvgl.io/services).
## :handshake: Serviços
A LVGL LLC foi criada para fornecer uma base sólida para a biblioteca LVGL e oferecer vários tipos de serviços para ajudá-lo no desenvolvimento da sua interface do usuário. Com mais de 15 anos de experiência na indústria gráfica e de interface do usuário, podemos ajudá-lo a levar sua interface do usuário para o próximo nível.
- **Design gráfico**: Nossos designers gráficos internos são especialistas em criar belos designs modernos que se adaptam ao seu produto e aos recursos do seu hardware.
- **Implementação da interface do usuário**: Também podemos implementar sua interface do usuário com base no design que você ou nós criamos. Você pode ter certeza de que tiraremos o máximo proveito de seu hardware e do LVGL. Se um recurso ou widget estiver faltando no LVGL, não se preocupe, nós o implementaremos para você.
- **Consultoria e Suporte**: Também podemos apoiá-lo com consultoria para evitar erros que podem te custar caros durante o desenvolvimento da sua interface do usuário.
- **Certificação**: Para empresas que oferecem placas para desenvolvimento ou kits prontos para produção, fazemos certificação que mostram como uma placa pode executar o LVGL.
Confira nossas [demonstrações](https://lvgl.io/demos) como referência. Para obter mais informações, consulte a [página de serviços](https://lvgl.io/services).
[Fale conosco](https://lvgl.io/#contact) e conte como podemos ajudar.
## :star2: Contribuindo
O LVGL é um projeto aberto e sua contribuição é muito bem-vinda. Há muitas maneiras de contribuir, desde simplesmente falando sobre seu projeto, escrevendo exemplos, melhorando a documentação, corrigindo bugs até hospedar seu próprio projeto sob a organização LVGL.
Para obter uma descrição detalhada das oportunidades de contribuição, visite a página de [contribuição](https://docs.lvgl.io/master/CONTRIBUTING.html) da documentação.
Mais de 300 pessoas já deixaram sua impressão digital no LVGL. Seja um deles! Veja o seu aqui! :slightly_smiling_face:
<a href="https://github.com/lvgl/lvgl/graphs/contributors">
<img src="https://contrib.rocks/image?repo=lvgl/lvgl&max=48" />
</a>
... e muitos outros.
docs/README_pt_BR.rst.back
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<a href="https://opencollective.com/lvgl" target="_blank"><img align="left" src="https://lvgl.io/assets/images/sponsor.png" height="32px"></a>
<p align="right">
<a href="../README.md">English</a> | <b>中文</b> | <a href="./README_pt_BR.md">Português do Brasil</a> | <a href="./README_jp.md">日本語</a>
</p>
<br>
<p align="center">
  <img src="https://lvgl.io/assets/images/logo_lvgl.png">
</p>
  <h1 align="center">Light and Versatile Graphics Library</h1>
<h1 align="center">轻量级通用型图形库</h1>
  <br>
<div align="center">
<img src="https://github.com/kisvegabor/test/raw/master/smartwatch_demo.gif">
&nbsp;
  <img border="1px" src="https://lvgl.io/assets/images/lvgl_widgets_demo.gif">
</div>
<br>
<p align="center">
<a href="https://lvgl.io" title="Homepage of LVGL">官网 </a> |
<a href="https://docs.lvgl.io/" title="Detailed documentation with 100+ examples">文档</a> |
<a href="https://forum.lvgl.io" title="Get help and help others">论坛</a> |
<a href="https://lvgl.io/demos" title="Demos running in your browser">示例</a> |
<a href="https://lvgl.io/services" title="Graphics design, UI implementation and consulting">服务</a> |
<a href="https://squareline.io/" title="UI Editor for LVGL">SquareLine Studio</a>
</p>
<br>
[中文宣传单](./flyers/LVGL-Chinese-Flyer.pdf)
#### 目录
- [概况与总览](#概况与总览)
- [特性](#特性)
- [硬件要求](#硬件要求)
- [已经支持的平台](#已经支持的平台)
- [如何入门](#如何入门)
- [例程](#例程)
- [C](#c)
- [Micropython](#micropython)
- [服务](#服务)
- [如何向社区贡献](#如何向社区贡献)
## 概况与总览
### 特性
* 丰富且强大的模块化[图形组件](https://docs.lvgl.io/master/widgets/index.html)：按钮 (buttons)、图表 (charts)、列表 (lists)、滑动条 (sliders)、图片 (images) 等
* 高级的图形引擎：动画、抗锯齿、透明度、平滑滚动、图层混合等效果
* 支持多种[输入设备](https://docs.lvgl.io/master/overview/indev.html)：触摸屏、 键盘、编码器、按键等
* 支持[多显示设备](https://docs.lvgl.io/master/overview/display.html)
* 不依赖特定的硬件平台，可以在任何显示屏上运行
* 配置可裁剪（最低资源占用：64 kB Flash，16 kB RAM）
* 基于UTF-8的多语种支持，例如中文、日文、韩文、阿拉伯文等
* 可以通过[类CSS](https://docs.lvgl.io/master/overview/style.html)的方式来设计、布局图形界面（例如：[Flexbox](https://docs.lvgl.io/master/layouts/flex.html)、[Grid](https://docs.lvgl.io/master/layouts/grid.html)）
* 支持操作系统、外置内存、以及硬件加速（LVGL已内建支持STM32 DMA2D、SWM341 DMA2D、NXP PXP和VGLite）
* 即便仅有[单缓冲区(frame buffer)](https://docs.lvgl.io/master/porting/display.html)的情况下，也可保证渲染如丝般顺滑
* 全部由C编写完成，并支持C++调用
* 支持Micropython编程，参见：[LVGL API in Micropython](https://blog.lvgl.io/2019-02-20/micropython-bindings)
* 支持[模拟器](https://docs.lvgl.io/master/get-started/platforms/pc-simulator.html)仿真，可以无硬件依托进行开发
* 丰富详实的[例程](https://github.com/lvgl/lvgl/tree/master/examples)
* 详尽的[文档](http://docs.lvgl.io/)以及API参考手册，可线上查阅或可下载为PDF格式
### 硬件要求
<table>
<tr>
<td> <strong>要求</strong> </td>
<td><strong>最低要求</strong></td>
<td><strong>建议要求</strong></td>
</tr>
<tr>
<td><strong>架构</strong></td>
<td colspan="2">16、32、64位微控制器或微处理器</td>
</tr>
<tr>
<td> <strong>时钟</strong></td>
<td> &gt; 16 MHz</td>
<td> &gt; 48 MHz</td>
</tr>
<tr>
<td> <strong>Flash/ROM</strong></td>
<td> &gt; 64 kB </td>
<td> &gt; 180 kB</td>
</tr>
<tr>
<td> <strong>Static RAM</strong></td>
<td> &gt; 16 kB </td>
<td> &gt; 48 kB</td>
</tr>
<tr>
<td> <strong>Draw buffer</strong></td>
<td> &gt; 1 &times; <em>hor. res.</em> pixels </td>
<td> &gt; 1/10屏幕大小 </td>
</tr>
<tr>
<td> <strong>编译器</strong></td>
<td colspan="2"> C99或更新 </td>
</tr>
</table>
*注意：资源占用情况与具体硬件平台、编译器等因素有关，上表中仅给出参考值*
### 已经支持的平台
LVGL本身并不依赖特定的硬件平台，任何满足LVGL硬件配置要求的微控制器均可运行LVGL。
如下仅列举其中一部分:
- NXP: Kinetis, LPC, iMX, iMX RT
- STM32F1, STM32F3, STM32F4, STM32F7, STM32L4, STM32L5, STM32H7
- Microchip dsPIC33, PIC24, PIC32MX, PIC32MZ
- [Linux frame buffer](https://blog.lvgl.io/2018-01-03/linux_fb) (/dev/fb)
- [Raspberry Pi](http://www.vk3erw.com/index.php/16-software/63-raspberry-pi-official-7-touchscreen-and-littlevgl)
- [Espressif ESP32](https://github.com/lvgl/lv_port_esp32)
- [Infineon Aurix](https://github.com/lvgl/lv_port_aurix)
- Nordic NRF52 Bluetooth modules
- Quectel modems
- [SYNWIT SWM341](https://www.synwit.cn/)
LVGL也支持：
- [Arduino library](https://docs.lvgl.io/master/get-started/platforms/arduino.html)
- [PlatformIO package](https://registry.platformio.org/libraries/lvgl/lvgl)
- [Zephyr library](https://docs.zephyrproject.org/latest/kconfig.html#CONFIG_LVGL)
- [ESP32 component](https://docs.lvgl.io/master/get-started/platforms/espressif.html)
- [NXP MCUXpresso component](https://www.nxp.com/design/software/embedded-software/lvgl-open-source-graphics-library:LITTLEVGL-OPEN-SOURCE-GRAPHICS-LIBRARY)
- [NuttX library](https://docs.lvgl.io/master/get-started/os/nuttx.html)
- [RT-Thread RTOS](https://www.rt-thread.org/document/site/#/rt-thread-version/rt-thread-standard/packages-manual/lvgl-docs/introduction)
## 如何入门
请按照如下顺序来学习LVGL：
1. 使用[网页在线例程](https://lvgl.io/demos)来体验LVGL（3分钟）
2. 阅读文档[简介](https://docs.lvgl.io/master/intro/index.html)章节来初步了解LVGL（5分钟）
3. 再来阅读一下文档快速[快速概览](https://docs.lvgl.io/master/get-started/quick-overview.html)章节来了解LVGL的基本知识（15分钟）
4. 学习如何使用[模拟器](https://docs.lvgl.io/master/get-started/platforms/pc-simulator.html)来在电脑上仿真LVGL（10分钟）
5. 试着动手实践一些[例程](https://github.com/lvgl/lvgl/tree/master/examples)
6. 参考[移植指南](https://docs.lvgl.io/master/porting/index.html)尝试将LVGL移植到一块开发板上，LVGL也已经提供了一些移植好的[工程](https://github.com/lvgl?q=lv_port_)
7. 仔细阅读文档[总览](https://docs.lvgl.io/master/overview/index.html)章节来更加深入的了解和熟悉LVGL（2-3小时）
8. 浏览文档[组件(Widgets)](https://docs.lvgl.io/master/widgets/index.html)章节来了解如何使用它们
9. 如果你有问题可以到LVGL[论坛](http://forum.lvgl.io/)提问
10. 阅读文档[如何向社区贡献](https://docs.lvgl.io/master/CONTRIBUTING.html)章节来看看你能帮LVGL社区做些什么，以促进LVGL软件质量的不断提高（15分钟）
## 例程
更多例程请参见 [examples](https://github.com/lvgl/lvgl/tree/master/examples) 文件夹。
![LVGL button with label example](https://github.com/lvgl/lvgl/raw/master/docs/misc/btn_example.png)
### C
```c
lv_obj_t * btn = lv_btn_create(lv_scr_act()); /*Add a button to the current screen*/
lv_obj_set_pos(btn, 10, 10); /*Set its position*/
lv_obj_set_size(btn, 100, 50); /*Set its size*/
lv_obj_add_event(btn, btn_event_cb, LV_EVENT_CLICKED, NULL); /*Assign a callback to the button*/
lv_obj_t * label = lv_label_create(btn); /*Add a label to the button*/
lv_label_set_text(label, "Button"); /*Set the labels text*/
lv_obj_center(label); /*Align the label to the center*/
...
void btn_event_cb(lv_event_t * e)
{
printf("Clicked\n");
}
```
### Micropython
更多信息请到 [Micropython官网](https://docs.lvgl.io/master/get-started/bindings/micropython.html) 查询.
```python
def btn_event_cb(e):
print("Clicked")
# Create a Button and a Label
btn = lv.btn(lv.scr_act())
btn.set_pos(10, 10)
btn.set_size(100, 50)
btn.add_event(btn_event_cb, lv.EVENT.CLICKED, None)
label = lv.label(btn)
label.set_text("Button")
label.center()
```
## 服务
LVGL 责任有限公司成立的目的是为了给用户使用LVGL图形库提供额外的技术支持，我们致力于提供以下服务：
- 图形设计
- UI设计
- 技术咨询以及技术支持
更多信息请参见 https://lvgl.io/services ，如果有任何问题请随时联系我们。
## 如何向社区贡献
LVGL是一个开源项目，非常欢迎您参与到社区贡献当中。您有很多种方式来为提高LVGL贡献您的一份力量，包括但不限于：
- 介绍你基于LVGL设计的作品或项目
- 写一些例程
- 修改以及完善文档
- 修复bug
请参见文档[如何向社区贡献](https://docs.lvgl.io/master/CONTRIBUTING.html)章节来获取更多信息。
docs/README_zh.rst.back
+493
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.. raw:: html
<p align="right">
English \| 中文 \| Português do Brasil \| 日本語
.. raw:: html
</p>
.. raw:: html
<p align="center">
.. raw:: html
</p>
.. raw:: html
<h1 align="center">
Light and Versatile Graphics Library
.. raw:: html
</h1>
.. raw:: html
<h1 align="center">
轻量级通用型图形库
.. raw:: html
</h1>
.. raw:: html
<p align="center">
官网 \| 文档 \| 论坛 \| 示例 \| 服务 \| SquareLine Studio
.. raw:: html
</p>
`中文宣传单 <./flyers/LVGL-Chinese-Flyer.pdf>`__
目录
^^^^
- `概况与总览 <#概况与总览>`__
- `特性 <#特性>`__
- `硬件要求 <#硬件要求>`__
- `已经支持的平台 <#已经支持的平台>`__
- `如何入门 <#如何入门>`__
- `例程 <#例程>`__
- `C <#c>`__
- `Micropython <#micropython>`__
- `服务 <#服务>`__
- `如何向社区贡献 <#如何向社区贡献>`__
概况与总览
----------
特性
~~~~
- 丰富且强大的模块化\ `图形组件 <https://docs.lvgl.io/master/widgets/index.html>`__\ ：按钮
(buttons)、图表 (charts)、列表 (lists)、滑动条 (sliders)、图片
(images) 等
- 高级的图形引擎：动画、抗锯齿、透明度、平滑滚动、图层混合等效果
- 支持多种\ `输入设备 <https://docs.lvgl.io/master/overview/indev.html>`__\ ：触摸屏、
键盘、编码器、按键等
- 支持\ `多显示设备 <https://docs.lvgl.io/master/overview/display.html>`__
- 不依赖特定的硬件平台，可以在任何显示屏上运行
- 配置可裁剪（最低资源占用：64 kB Flash，16 kB RAM）
- 基于UTF-8的多语种支持，例如中文、日文、韩文、阿拉伯文等
- 可以通过\ `类CSS <https://docs.lvgl.io/master/overview/style.html>`__\ 的方式来设计、布局图形界面（例如：\ `Flexbox <https://docs.lvgl.io/master/layouts/flex.html>`__\ 、\ `Grid <https://docs.lvgl.io/master/layouts/grid.html>`__\ ）
- 支持操作系统、外置内存、以及硬件加速（LVGL已内建支持STM32
DMA2D、SWM341 DMA2D、NXP PXP和VGLite）
- 即便仅有\ `单缓冲区(frame
buffer) <https://docs.lvgl.io/master/porting/display.html>`__\ 的情况下，也可保证渲染如丝般顺滑
- 全部由C编写完成，并支持C++调用
- 支持Micropython编程，参见：\ `LVGL API in
Micropython <https://blog.lvgl.io/2019-02-20/micropython-bindings>`__
- 支持\ `模拟器 <https://docs.lvgl.io/master/get-started/platforms/pc-simulator.html>`__\ 仿真，可以无硬件依托进行开发
- 丰富详实的\ `例程 <https://github.com/lvgl/lvgl/tree/master/examples>`__
- 详尽的\ `文档 <http://docs.lvgl.io/>`__\ 以及API参考手册，可线上查阅或可下载为PDF格式
硬件要求
~~~~~~~~
.. raw:: html
<table>
.. raw:: html
<tr>
.. raw:: html
<td>
要求
.. raw:: html
</td>
.. raw:: html
<td>
最低要求
.. raw:: html
</td>
.. raw:: html
<td>
建议要求
.. raw:: html
</td>
.. raw:: html
</tr>
.. raw:: html
<tr>
.. raw:: html
<td>
架构
.. raw:: html
</td>
.. raw:: html
<td colspan="2">
16、32、64位微控制器或微处理器
.. raw:: html
</td>
.. raw:: html
</tr>
.. raw:: html
<tr>
.. raw:: html
<td>
时钟
.. raw:: html
</td>
.. raw:: html
<td>
> 16 MHz
.. raw:: html
</td>
.. raw:: html
<td>
> 48 MHz
.. raw:: html
</td>
.. raw:: html
</tr>
.. raw:: html
<tr>
.. raw:: html
<td>
Flash/ROM
.. raw:: html
</td>
.. raw:: html
<td>
> 64 kB
.. raw:: html
</td>
.. raw:: html
<td>
> 180 kB
.. raw:: html
</td>
.. raw:: html
</tr>
.. raw:: html
<tr>
.. raw:: html
<td>
Static RAM
.. raw:: html
</td>
.. raw:: html
<td>
> 16 kB
.. raw:: html
</td>
.. raw:: html
<td>
> 48 kB
.. raw:: html
</td>
.. raw:: html
</tr>
.. raw:: html
<tr>
.. raw:: html
<td>
Draw buffer
.. raw:: html
</td>
.. raw:: html
<td>
> 1 × hor. res. pixels
.. raw:: html
</td>
.. raw:: html
<td>
> 1/10屏幕大小
.. raw:: html
</td>
.. raw:: html
</tr>
.. raw:: html
<tr>
.. raw:: html
<td>
编译器
.. raw:: html
</td>
.. raw:: html
<td colspan="2">
C99或更新
.. raw:: html
</td>
.. raw:: html
</tr>
.. raw:: html
</table>
*注意：资源占用情况与具体硬件平台、编译器等因素有关，上表中仅给出参考值*
已经支持的平台
~~~~~~~~~~~~~~
LVGL本身并不依赖特定的硬件平台，任何满足LVGL硬件配置要求的微控制器均可运行LVGL。
如下仅列举其中一部分:
- NXP: Kinetis, LPC, iMX, iMX RT
- STM32F1, STM32F3, STM32F4, STM32F7, STM32L4, STM32L5, STM32H7
- Microchip dsPIC33, PIC24, PIC32MX, PIC32MZ
- `Linux frame buffer <https://blog.lvgl.io/2018-01-03/linux_fb>`__
(/dev/fb)
- `Raspberry
Pi <http://www.vk3erw.com/index.php/16-software/63-raspberry-pi-official-7-touchscreen-and-littlevgl>`__
- `Espressif ESP32 <https://github.com/lvgl/lv_port_esp32>`__
- `Infineon Aurix <https://github.com/lvgl/lv_port_aurix>`__
- Nordic NRF52 Bluetooth modules
- Quectel modems
- `SYNWIT SWM341 <https://www.synwit.cn/>`__
LVGL也支持： - `Arduino
library <https://docs.lvgl.io/master/get-started/platforms/arduino.html>`__
- `PlatformIO
package <https://registry.platformio.org/libraries/lvgl/lvgl>`__ -
`Zephyr
library <https://docs.zephyrproject.org/latest/kconfig.html#CONFIG_LVGL>`__
- `ESP32
component <https://docs.lvgl.io/master/get-started/platforms/espressif.html>`__
- `NXP MCUXpresso
component <https://www.nxp.com/design/software/embedded-software/lvgl-open-source-graphics-library:LITTLEVGL-OPEN-SOURCE-GRAPHICS-LIBRARY>`__
- `NuttX
library <https://docs.lvgl.io/master/get-started/os/nuttx.html>`__ -
`RT-Thread
RTOS <https://www.rt-thread.org/document/site/#/rt-thread-version/rt-thread-standard/packages-manual/lvgl-docs/introduction>`__
如何入门
--------
请按照如下顺序来学习LVGL： 1.
使用\ `网页在线例程 <https://lvgl.io/demos>`__\ 来体验LVGL（3分钟） 2.
阅读文档\ `简介 <https://docs.lvgl.io/master/intro/index.html>`__\ 章节来初步了解LVGL（5分钟）
3.
再来阅读一下文档快速\ `快速概览 <https://docs.lvgl.io/master/get-started/quick-overview.html>`__\ 章节来了解LVGL的基本知识（15分钟）
4.
学习如何使用\ `模拟器 <https://docs.lvgl.io/master/get-started/platforms/pc-simulator.html>`__\ 来在电脑上仿真LVGL（10分钟）
5.
试着动手实践一些\ `例程 <https://github.com/lvgl/lvgl/tree/master/examples>`__
6.
参考\ `移植指南 <https://docs.lvgl.io/master/porting/index.html>`__\ 尝试将LVGL移植到一块开发板上，LVGL也已经提供了一些移植好的\ `工程 <https://github.com/lvgl?q=lv_port_>`__
7.
仔细阅读文档\ `总览 <https://docs.lvgl.io/master/overview/index.html>`__\ 章节来更加深入的了解和熟悉LVGL（2-3小时）
8.
浏览文档\ `组件(Widgets) <https://docs.lvgl.io/master/widgets/index.html>`__\ 章节来了解如何使用它们
9. 如果你有问题可以到LVGL\ `论坛 <http://forum.lvgl.io/>`__\ 提问 10.
阅读文档\ `如何向社区贡献 <https://docs.lvgl.io/master/CONTRIBUTING.html>`__\ 章节来看看你能帮LVGL社区做些什么，以促进LVGL软件质量的不断提高（15分钟）
例程
----
更多例程请参见
`examples <https://github.com/lvgl/lvgl/tree/master/examples>`__
文件夹。
.. figure:: https://github.com/lvgl/lvgl/raw/master/docs/misc/btn_example.png
:alt: LVGL button with label example
LVGL button with label example
C
~
.. code:: c
lv_obj_t * btn = lv_btn_create(lv_scr_act()); /*Add a button to the current screen*/
lv_obj_set_pos(btn, 10, 10); /*Set its position*/
lv_obj_set_size(btn, 100, 50); /*Set its size*/
lv_obj_add_event(btn, btn_event_cb, LV_EVENT_CLICKED, NULL); /*Assign a callback to the button*/
lv_obj_t * label = lv_label_create(btn); /*Add a label to the button*/
lv_label_set_text(label, "Button"); /*Set the labels text*/
lv_obj_center(label); /*Align the label to the center*/
...
void btn_event_cb(lv_event_t * e)
{
printf("Clicked\n");
}
Micropython
~~~~~~~~~~~
更多信息请到
`Micropython官网 <https://docs.lvgl.io/master/get-started/bindings/micropython.html>`__
查询.
.. code:: python
def btn_event_cb(e):
print("Clicked")
# Create a Button and a Label
btn = lv.btn(lv.scr_act())
btn.set_pos(10, 10)
btn.set_size(100, 50)
btn.add_event(btn_event_cb, lv.EVENT.CLICKED, None)
label = lv.label(btn)
label.set_text("Button")
label.center()
服务
----
LVGL
责任有限公司成立的目的是为了给用户使用LVGL图形库提供额外的技术支持，我们致力于提供以下服务：
- 图形设计
- UI设计
- 技术咨询以及技术支持
更多信息请参见 https://lvgl.io/services ，如果有任何问题请随时联系我们。
如何向社区贡献
--------------
LVGL是一个开源项目，非常欢迎您参与到社区贡献当中。您有很多种方式来为提高LVGL贡献您的一份力量，包括但不限于：
- 介绍你基于LVGL设计的作品或项目
- 写一些例程
- 修改以及完善文档
- 修复bug
请参见文档\ `如何向社区贡献 <https://docs.lvgl.io/master/CONTRIBUTING.html>`__\ 章节来获取更多信息。
docs/ROADMAP.md → docs/ROADMAP.rst
View File
docs/_ext/lv_example.py
+34 -17
View File
@@ -2,16 +2,14 @@ import os
from docutils import nodes
from docutils.parsers.rst import Directive, directives
from docutils.parsers.rst.directives.images import Image
from sphinx.directives.code import LiteralInclude
# from docutils.parsers.rst.directives.images import Image
# from sphinx.directives.code import LiteralInclude
def excluded_list(argument):
return argument.split(',')
class LvExample(Directive):
required_arguments = 1
option_spec = {
@@ -19,8 +17,13 @@ class LvExample(Directive):
'language': directives.unchanged,
'description': directives.unchanged
}
def get_example_code_path(self, example_path, language):
return os.path.abspath("../examples/" + example_path + "." + language)
base_path = os.path.dirname(__file__)
examples_path = os.path.abspath(os.path.join(base_path, '..', 'examples'))
example_path = os.path.join(examples_path, example_path + '.' + language)
return example_path
def human_language_name(self, language):
if language == 'py':
return 'MicroPython'
@@ -28,18 +31,23 @@ class LvExample(Directive):
return 'C'
else:
return language
def github_path(self, example_path, language):
env = self.state.document.settings.env
return f"https://github.com/lvgl/lvgl/blob/{env.config.repo_commit_hash}/examples/{example_path}.{language}"
def embed_code(self, example_file, example_path, language, buttons={}):
toggle = nodes.container('', literal_block=False, classes=['toggle'])
header = nodes.container('', literal_block=False, classes=['header'])
toggle.append(header)
try:
with open(example_file) as f:
contents = f.read()
with open(example_file, 'rb') as f:
contents = f.read().decode('utf-8')
except FileNotFoundError:
print('File Not Found', example_file)
contents = 'Error encountered while trying to open ' + example_file
literal_list = nodes.literal_block(contents, contents)
literal_list['language'] = language
toggle.append(literal_list)
@@ -48,6 +56,7 @@ class LvExample(Directive):
paragraph_node.append(nodes.raw(text=f"<a class='lv-example-link-button' onclick=\"event.stopPropagation();\" href='{url}'>{text}</a>", format='html'))
header.append(paragraph_node)
return toggle
def run(self):
example_path = self.arguments[0]
example_name = os.path.split(example_path)[1]
@@ -61,15 +70,22 @@ class LvExample(Directive):
c_path = self.get_example_code_path(example_path, 'c')
py_path = self.get_example_code_path(example_path, 'py')
c_code = self.embed_code(c_path, example_path, 'c', buttons={
'<i class="fa fa-github"></i>&nbsp;GitHub': self.github_path(example_path, 'c')
})
py_code = self.embed_code(py_path, example_path, 'py', buttons={
'<i class="fa fa-github"></i>&nbsp;GitHub': self.github_path(example_path, 'py'),
'<i class="fa fa-play"></i>&nbsp;Simulator': f"https://sim.lvgl.io/v{env.config.version}/micropython/ports/javascript/index.html?script_startup=https://raw.githubusercontent.com/lvgl/lvgl/{env.config.repo_commit_hash}/examples/header.py&script=https://raw.githubusercontent.com/lvgl/lvgl/{env.config.repo_commit_hash}/examples/{example_path}.py"
})
if os.path.exists(c_path):
c_code = self.embed_code(c_path, example_path, 'c', buttons={
'<i class="fa fa-github"></i>&nbsp;View on GitHub': self.github_path(example_path, 'c')
})
else:
c_code = None
if not 'c' in excluded_languages:
if os.path.exists(py_path):
py_code = self.embed_code(py_path, example_path, 'py', buttons={
'<i class="fa fa-github"></i>&nbsp;View on GitHub': self.github_path(example_path, 'py'),
'<i class="fa fa-play"></i>&nbsp;MicroPython Simulator': f"https://sim.lvgl.io/v{env.config.version}/micropython/ports/javascript/index.html?script_startup=https://raw.githubusercontent.com/lvgl/lvgl/{env.config.repo_commit_hash}/examples/header.py&script=https://raw.githubusercontent.com/lvgl/lvgl/{env.config.repo_commit_hash}/examples/{example_path}.py"
})
else:
py_code = None
if 'c' not in excluded_languages:
if env.app.tags.has('html'):
iframe_html = f"<div class='lv-example' data-real-src='/{env.config.version}/_static/built_lv_examples/index.html?example={example_name}&w=320&h=240'></div>"
@@ -77,9 +93,9 @@ class LvExample(Directive):
layout_node = nodes.raw(text=f"<div class='lv-example-container'>{iframe_html}{description_html}</div>", format='html')
node_list.append(layout_node)
if not 'c' in excluded_languages:
if 'c' not in excluded_languages and c_code is not None:
node_list.append(c_code)
if not 'py' in excluded_languages:
if 'py' not in excluded_languages and py_code is not None:
node_list.append(py_code)
trailing_node = nodes.raw(text=f"<hr/>", format='html')
@@ -87,6 +103,7 @@ class LvExample(Directive):
return node_list
def setup(app):
app.add_directive("lv_example", LvExample)
app.add_config_value("repo_commit_hash", "", "env")
docs/_static/css/custom.css
Vendored
+12
View File
@@ -130,4 +130,16 @@ dl.cpp.unexpanded dd {
}
.expanded .lv-api-expansion-button::before {
content: "\f0d7 \00a0";
}
.wy-nav-content{
padding: 1.618em 3.236em;
height: 100%;
max-width: 1920px;
margin: auto
}
div.body {
min-width: 360px;
max-width: 1920px;
}
docs/_static/js/custom.js
Vendored
+1 -1
View File
@@ -15,4 +15,4 @@ document.addEventListener('DOMContentLoaded', (event) => {
dt.insertBefore(button, dt.firstChild);
});
})
})
docs/_static/js/include_html.js
Vendored
+29
View File
@@ -0,0 +1,29 @@
/*https://www.w3schools.com/howto/howto_html_include.asp*/
function includeHTML() {
var z, i, elmnt, file, xhttp;
/*loop through a collection of all HTML elements:*/
z = document.getElementsByTagName("*");
for (i = 0; i < z.length; i++) {
elmnt = z[i];
/*search for elements with a certain attribute:*/
file = elmnt.getAttribute("include-html");
if (file) {
/*make an HTTP request using the attribute value as the file name:*/
xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (this.readyState == 4) {
if (this.status == 200) {elmnt.innerHTML = this.responseText;}
if (this.status == 404) {elmnt.innerHTML = "Page not found.";}
/*remove the attribute, and call this function once more:*/
elmnt.removeAttribute("w3-include-html");
includeHTML();
}
}
xhttp.open("GET", file, true);
xhttp.send();
/*exit the function:*/
return;
}
}
};
docs/build.py
+223 -36
View File
@@ -1,74 +1,261 @@
#!/usr/bin/env python3
# ****************************************************************************
# IMPOTRANT: If you are getting a lexer error for an example you need to check
# for extra lines at the edn of the file. Only a single empty line
# is allowed!!! Ask me how long it took me to figure this out
# ****************************************************************************
import sys
import os
import subprocess
import re
import example_list as ex
import doc_builder
import shutil
import tempfile
# due to the modifications that take place to the documentation files
# when the documentaation builds it is better to copy the source files to a
# temporary folder and modify the copies. Not setting it up this way makes it
# a real headache when making alterations that need to be comitted as the
# alterations trigger the files as changed.
# If there is debugging that needs to be done you can provide a command line
# switch of "develop" and it will leave the temporary directory in tact and
# that directory will be output at the end of the build.
# the html and PDF output locations are going to remain the same as they were.
# it's just the source documentation files that are going to be copied.
temp_directory = tempfile.mkdtemp(suffix='.lvgl_docs')
langs = ['en']
# Change to script directory for consistency
abspath = os.path.abspath(__file__)
dname = os.path.dirname(abspath)
os.chdir(dname)
base_path = os.path.abspath(os.path.dirname(__file__))
project_path = os.path.abspath(os.path.join(base_path, '..'))
examples_path = os.path.join(project_path, 'examples')
lvgl_src_path = os.path.join(project_path, 'src')
latex_output_path = os.path.join(temp_directory, 'out_latex')
pdf_src_file = os.path.join(latex_output_path, 'LVGL.pdf')
pdf_dst_file = os.path.join(temp_directory, 'LVGL.pdf')
html_src_path = temp_directory
html_dst_path = os.path.join(project_path, 'out_html')
os.chdir(base_path)
clean = 0
trans = 0
skip_latex = False
develop = False
args = sys.argv[1:]
if len(args) >= 1:
if "clean" in args:
clean = 1
if "skip_latex" in args:
skip_latex = True
if 'develop' in args:
develop = True
def cmd(s):
print("")
print(s)
print("-------------------------------------")
r = os.system(s)
if r != 0:
print("Exit build due to previous error")
exit(-1)
print("")
print(s)
print("-------------------------------------")
r = os.system(s)
if r != 0:
print("Exit build due to previous error")
exit(-1)
# Get the current branch name
status, br = subprocess.getstatusoutput("git branch | grep '*'")
status, br = subprocess.getstatusoutput("git branch")
_, gitcommit = subprocess.getstatusoutput("git rev-parse HEAD")
br = re.sub('\* ', '', br)
# Generate the list of examples
ex.exec()
urlpath = re.sub('release/', '', br)
os.environ['LVGL_URLPATH'] = urlpath
os.environ['LVGL_GITCOMMIT'] = gitcommit
clean = 0
trans = 0
skip_latex = False
args = sys.argv[1:]
if len(args) >= 1:
if "clean" in args: clean = 1
if "skip_latex" in args: skip_latex = True
lang = "en"
print("")
print("****************")
print("Building")
print("****************")
if clean:
cmd("rm -rf " + lang)
cmd("mkdir " + lang)
if clean:
print('cleaning...')
# api_path = os.path.join(dname, 'API')
# xml_path = os.path.join(dname, 'xml')
# doxy_path = os.path.join(dname, 'doxygen_html')
# if os.path.exists(api_path):
# shutil.rmtree(api_path)
# if os.path.exists(lang):
# shutil.rmtree(lang)
if os.path.exists(html_dst_path):
shutil.rmtree(html_dst_path)
# if os.path.exists(xml_path):
# shutil.rmtree(xml_path)
#
# if os.path.exists(doxy_path):
# shutil.rmtree(doxy_path)
# os.mkdir(api_path)
# os.mkdir(lang)
shutil.copytree('.', temp_directory, dirs_exist_ok=True)
shutil.copytree(examples_path, os.path.join(temp_directory, 'examples'))
with open(os.path.join(temp_directory, 'Doxyfile'), 'rb') as f:
data = f.read().decode('utf-8')
data = data.replace('*#*#SRC#*#*', '"{0}"'.format(lvgl_src_path))
with open(os.path.join(temp_directory, 'Doxyfile'), 'wb') as f:
f.write(data.encode('utf-8'))
print("Generate the list of examples")
ex.exec(temp_directory)
print("Running doxygen")
cmd("cd ../scripts && doxygen Doxyfile")
cmd('cd "{0}" && doxygen Doxyfile'.format(temp_directory))
print('Reading Doxygen output')
doc_builder.run(
project_path,
temp_directory,
os.path.join(temp_directory, 'layouts'),
os.path.join(temp_directory, 'libs'),
os.path.join(temp_directory, 'others'),
os.path.join(temp_directory, 'overview'),
os.path.join(temp_directory, 'overview', 'renderers'),
os.path.join(temp_directory, 'porting'),
os.path.join(temp_directory, 'widgets')
)
# we make sure to remove the link to the PDF before the PDF get generated
# doesn't make any sense to have a link to the PDF in the PDF. The link gets
# added if there is a PDF build so the HTML build will have the link.
index_path = os.path.join(temp_directory, 'index.rst')
with open(index_path, 'rb') as f:
index_data = f.read().decode('utf-8')
if 'PDF version: :download:`LVGL.pdf <LVGL.pdf>`' in index_data:
index_data = index_data.replace(
'PDF version: :download:`LVGL.pdf <LVGL.pdf>`\n',
''
)
with open(index_path, 'wb') as f:
f.write(index_data.encode('utf-8'))
# BUILD PDF
if not skip_latex:
# Silly workaround to include the more or less correct PDF download link in the PDF
#cmd("cp -f " + lang +"/latex/LVGL.pdf LVGL.pdf | true")
cmd("sphinx-build -b latex . out_latex")
# Generate PDF
cmd("cd out_latex && latexmk -pdf 'LVGL.tex'")
# Copy the result PDF to the main directory to make it available for the HTML build
cmd("cd out_latex && cp -f LVGL.pdf ../LVGL.pdf")
if skip_latex:
print("skipping latex build as requested")
else:
print("skipping latex build as requested")
# Silly workaround to include the more or less correct
# PDF download link in the PDF
# cmd("cp -f " + lang +"/latex/LVGL.pdf LVGL.pdf | true")
cmd('sphinx-build -b latex "{src}" "{dst}" -j {cpu}'.format(
src=temp_directory,
dst=latex_output_path,
cpu=os.cpu_count()
))
# Generate PDF
cmd('cd "{out_latex}" && latexmk -pdf "LVGL.tex"'.format(
out_latex=latex_output_path
))
# Copy the result PDF to the main directory to make
# it available for the HTML build
shutil.copyfile(pdf_src_file, pdf_dst_file)
# cmd("cd out_latex && cp -f LVGL.pdf ../LVGL.pdf")
# add the PDF link so the HTML build will have it.
index_data = 'PDF version: :download:`LVGL.pdf <LVGL.pdf>`\n' + index_data
with open(index_path, 'wb') as f:
f.write(index_data.encode('utf-8'))
# BUILD HTML
cmd("sphinx-build -b html . ../out_html")
def get_version():
path = os.path.join(project_path, 'lvgl.h')
with open(path, 'rb') as f:
d = f.read().decode('utf-8')
d = d.split('#define LVGL_VERSION_MAJOR', 1)[-1]
major, d = d.split('\n', 1)
d = d.split('#define LVGL_VERSION_MINOR', 1)[-1]
minor, d = d.split('\n', 1)
d = d.split('#define LVGL_VERSION_PATCH', 1)[-1]
patch, d = d.split('\n', 1)
ver = '{0}.{1}.{2}'.format(major.strip(), minor.strip(), patch.strip())
if '#define LVGL_VERSION_INFO' in d:
d = d.split('#define LVGL_VERSION_INFO', 1)[-1]
info, d = d.split('\n', 1)
info = info.strip().replace('"', '')
ver += '-' + info
return ver
cmd('sphinx-build -b html "{src}" "{dst}" -D version="{version}" -E -j {cpu}'.format(
src=html_src_path,
dst=html_dst_path,
version=get_version(),
cpu=os.cpu_count()
))
if develop:
print('temp directory:', temp_directory)
else:
def iter_temp(p):
folders = []
remove_folder = True
for temp_file in os.listdir(p):
temp_file = os.path.join(p, temp_file)
if os.path.isdir(temp_file):
folders.append(temp_file)
else:
try:
os.remove(temp_file)
except OSError:
remove_folder = False
for folder in folders:
if not iter_temp(folder):
remove_folder = False
if remove_folder:
try:
os.rmdir(p)
except OSError:
remove_folder = False
return remove_folder
iter_temp(temp_directory)
print('output path:', html_dst_path)
print('\nFINISHED!!')
docs/conf.py
+36 -14
View File
@@ -23,9 +23,9 @@ import sys
sys.path.insert(0, os.path.abspath('./_ext'))
from subprocess import PIPE, Popen
# from subprocess import PIPE, Popen
import recommonmark
# import recommonmark
from recommonmark.transform import AutoStructify
from sphinx.builders.html import StandaloneHTMLBuilder
@@ -38,15 +38,20 @@ from sphinx.builders.html import StandaloneHTMLBuilder
# Add any Sphinx extension module names here, as strings. They can be
# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
# ones.
extensions = ['sphinx.ext.autodoc',
extensions = [
'sphinx_rtd_theme',
'sphinx.ext.autodoc',
'sphinx.ext.intersphinx',
'sphinx.ext.todo',
'recommonmark',
'sphinx_markdown_tables',
# 'recommonmark',
# 'sphinx_markdown_tables',
'breathe',
'sphinx_sitemap',
'lv_example'
]
'lv_example',
'sphinx_rtd_dark_mode'
]
default_dark_mode = False
# Add any paths that contain templates here, relative to this directory.
templates_path = ['_templates']
@@ -60,7 +65,7 @@ highlight_language = 'c'
# The suffix(es) of source filenames.
# You can specify multiple suffix as a list of string:
#
source_suffix = ['.rst', '.md']
source_suffix = ['.rst']# , '.md']
# The master toctree document.
@@ -68,9 +73,10 @@ master_doc = 'index'
# General information about the project.
project = 'LVGL'
copyright = '2021, LVGL Kft'
copyright = '2023, LVGL Kft'
author = 'LVGL community'
# The version info for the project you're documenting, acts as replacement for
# |version| and |release|, also used in various other places throughout the
# built documents.
@@ -78,20 +84,20 @@ author = 'LVGL community'
# The short X.Y version.
# embeddedt: extract using scripts/find_version.sh
version = subprocess.run(["../scripts/find_version.sh"], capture_output=True).stdout.decode("utf-8").strip()
version = ''
# The language for content autogenerated by Sphinx. Refer to documentation
# for a list of supported languages.
#
# This is also used if you do content translation via gettext catalogs.
# Usually you set "language" from the command line for these cases.
language = None
language = 'en'
# List of patterns, relative to source directory, that match files and
# directories to ignore when looking for source files.
# This patterns also effect to html_static_path and html_extra_path
exclude_patterns = ['_build', 'doxygen_html', 'Thumbs.db', '.DS_Store',
'README.md', 'lv_examples', 'out_html', 'env' ]
'README.md', 'lv_examples', 'out_html', 'env', '_ext', 'examples']
# The name of the Pygments (syntax highlighting) style to use.
pygments_style = 'sphinx'
@@ -111,10 +117,25 @@ html_theme = 'sphinx_rtd_theme'
# further. For a list of options available for each theme, see the
# documentation.
#
html_theme_options = {
'collapse_navigation' : False,
'display_version': True,
'prev_next_buttons_location': 'both',
'style_external_links': False,
# 'vcs_pageview_mode': '',
# 'style_nav_header_background': 'white',
# Toc options
'sticky_navigation': True,
'navigation_depth': 4,
'includehidden': True,
'titles_only': False,
'collapse_navigation': False,
'logo_only': True,
}
# For site map generation
html_baseurl = f"https://docs.lvgl.io/{os.environ['LVGL_URLPATH']}/en/html/"
@@ -151,7 +172,8 @@ html_sidebars = {
}
html_js_files = [
'js/custom.js'
'js/custom.js',
'js/include_html.js'
]
html_favicon = 'favicon.png'
docs/doc_builder.py
+713
View File
File diff suppressed because it is too large Load Diff
docs/example_list.py
+137 -100
View File
@@ -3,123 +3,160 @@ import os
def process_index_rst(path):
# print(path)
with open(path) as fp:
last_line=""
line=""
title_tmp=""
line = fp.readline()
d = {}
while line:
if line[0:3] == '"""':
title_tmp = last_line
elif line[0:15] ==".. lv_example::":
name = line[16:].strip()
title_tmp = title_tmp.strip()
d[name] = title_tmp
last_line = line
line = fp.readline()
# print(path)
with open(path, 'r') as fp:
data = fp.read()
return(d)
data = data.split('\n')
h1= {
"get_started":"Get started",
"styles":"Styles",
"anim":"Animations",
"event":"Events",
"layouts":"Layouts",
"scroll":"Scrolling",
"widgets":"Widgets"
last_line = ""
title_tmp = ""
for line in data:
line = line.strip()
if not line:
continue
if line.startswith('---'):
title_tmp = last_line.strip()
elif line.startswith('.. lv_example::'):
name = line.replace('.. lv_example::', '').strip()
yield name, title_tmp
last_line = line
h1 = {
"get_started": "Get started",
"styles": "Styles",
"anim": "Animations",
"event": "Events",
"layouts": "Layouts",
"scroll": "Scrolling",
"widgets": "Widgets"
}
widgets = {
"obj":"Base object",
"arc":"Arc",
"bar":"Bar",
"btn":"Button",
"btnmatrix":"Button matrix",
"calendar":"Calendar",
"canvas":"Canvas",
"chart":"Chart",
"checkbox":"Checkbox",
"colorwheel":"Colorwheel",
"dropdown":"Dropdown",
"img":"Image",
"imgbtn":"Image button",
"keyboard":"Keyboard",
"label":"Label",
"led":"LED",
"line":"Line",
"list":"List",
"menu":"Menu",
"meter":"Meter",
"msgbox":"Message box",
"roller":"Roller",
"slider":"Slider",
"span":"Span",
"spinbox":"Spinbox",
"spinner":"Spinner",
"switch":"Switch",
"table":"Table",
"tabview":"Tabview",
"textarea":"Textarea",
"tileview":"Tabview",
"win":"Window",
"obj": "Base object",
"arc": "Arc",
"bar": "Bar",
"btn": "Button",
"btnmatrix": "Button matrix",
"calendar": "Calendar",
"canvas": "Canvas",
"chart": "Chart",
"checkbox": "Checkbox",
"colorwheel": "Colorwheel",
"dropdown": "Dropdown",
"img": "Image",
"imgbtn": "Image button",
"keyboard": "Keyboard",
"label": "Label",
"led": "LED",
"line": "Line",
"list": "List",
"menu": "Menu",
"meter": "Meter",
"msgbox": "Message box",
"roller": "Roller",
"slider": "Slider",
"span": "Span",
"spinbox": "Spinbox",
"spinner": "Spinner",
"switch": "Switch",
"table": "Table",
"tabview": "Tabview",
"textarea": "Textarea",
"tileview": "Tabview",
"win": "Window",
}
HEADING = '='
CHAPTER = '#'
SECTION = '*'
SUBSECTION = '='
SUBSUBSECTION = '-'
def write_header(h_num, text, f):
text = text.strip()
if h_num == 0:
f.write(header_defs[h_num] * len(text))
f.write('\n')
f.write(text + '\n')
f.write(header_defs[h_num] * len(text))
f.write('\n\n')
# This is the order that Sphinx uses for the headings/titles. 0 is the
# largest and 4 is the smallest. If this order is not kept in the reST files
# Sphinx will complain
header_defs = {
0: HEADING,
1: CHAPTER,
2: SECTION,
3: SUBSECTION,
4: SUBSUBSECTION
}
layouts = {
"flex":"Flex",
"grid":"Grid",
"flex": "Flex",
"grid": "Grid",
}
def print_item(path, lvl, d, fout):
for k in d:
v = d[k]
if k.startswith(path + "/lv_example_"):
fout.write("#"*lvl + " " + v + "\n")
fout.write('```eval_rst\n')
fout.write(f".. lv_example:: {k}\n")
fout.write('```\n')
fout.write("\n")
for k in d:
v = d[k]
if k.startswith(path + "/lv_example_"):
write_header(lvl, v, fout)
fout.write(f".. lv_example:: {k}\n")
fout.write("\n")
def exec():
paths = [ "../examples/", "../demos/"]
fout = open("examples.md", "w")
filelist = []
for path in paths:
for root, dirs, files in os.walk(path):
for f in files:
#append the file name to the list
filelist.append(os.path.join(root,f))
def exec(temp_directory):
output_path = os.path.join(temp_directory, 'examples.rst')
filelist = [ fi for fi in filelist if fi.endswith("index.rst") ]
paths = ["../examples/", "../demos/"]
fout = open(output_path, "w")
filelist = []
d_all = {}
#print all the file names
for fn in filelist:
d_act = process_index_rst(fn)
d_all.update(d_act)
for path in paths:
for root, dirs, files in os.walk(path):
for f in files:
# append the file name to the list
filelist.append(os.path.join(root, f))
fout.write("```eval_rst\n")
fout.write(":github_url: |github_link_base|/examples.md\n")
fout.write("```\n")
fout.write("\n")
fout.write("# Examples\n")
filelist = [fi for fi in filelist if fi.endswith("index.rst")]
for h in h1:
fout.write("## " + h1[h] + "\n")
d_all = {}
# print all the file names
for fn in filelist:
d_all.update(dict(tuple(item for item in process_index_rst(fn))))
if h == "widgets":
for w in widgets:
fout.write("### " + widgets[w] + "\n")
print_item(h + "/" + w, 4, d_all, fout)
elif h == "layouts":
for l in layouts:
fout.write("### " + layouts[l] + "\n")
print_item(h + "/" + l, 4, d_all, fout)
else:
print_item(h, 3, d_all, fout)
# fout.write("```eval_rst\n")
# fout.write(":github_url: |github_link_base|/examples.md\n")
# fout.write("```\n")
# fout.write("\n")
fout.write("")
fout.write('.. _examples:\n\n')
write_header(0, 'Examples', fout)
for h in h1:
write_header(1, h1[h], fout)
if h == "widgets":
for w in widgets:
write_header(2, widgets[w], fout)
print_item(h + "/" + w, 3, d_all, fout)
elif h == "layouts":
for l in layouts:
write_header(2, layouts[l], fout)
print_item(h + "/" + l, 3, d_all, fout)
else:
print_item(h, 2, d_all, fout)
fout.write("")
docs/get-started/bindings/cpp.md → docs/get-started/bindings/cpp.rst
+3 -2
View File
@@ -1,4 +1,5 @@
# Cpp
===
Cpp
===
In progress: https://github.com/lvgl/lv_binding_cpp
docs/get-started/bindings/index.md → docs/get-started/bindings/index.rst
+3 -5
View File
@@ -1,8 +1,8 @@
# Bindings
========
Bindings
========
```eval_rst
.. toctree::
:maxdepth: 2
@@ -10,5 +10,3 @@
cpp
pikascript
javascript
```
docs/get-started/bindings/javascript.md
-113
View File
@@ -1,113 +0,0 @@
# JavaScript
With [lv_binding_js](https://github.com/lvgl/lv_binding_js) you can write lvgl with JavaScript.
It uses React's virtual DOM concept to manipulate lvgl UI components, providing a familiar React-like experience to users.
**Code**
<img src="../../_static/img/js_code.png">
**Code Runing on Real Device**
<img src="../../_static/img/js_on_device.jpg" style="transform: rotate(270deg); max-width: 400px; padding-left: 100px;">
## Table of Contents
- [Features](#features)
- [Demo](#demo)
- [Building](#building)
- [Components](#components)
- [Font](#font)
- [Animation](#animation)
- [Style](#style)
- [JSAPI](#jsapi)
- [Thanks](#thanks)
## Features
- Support all lvgl built-in components
- Fully suport lvgl flex and grid style
- support most lvgl style，just write like html5 css
- support dynamic load image
- Fully support lvgl animation
## Demo
See the [demo](https://github.com/lvgl/lv_binding_js/tree/master/demo) folder
## Building
The following are developer notes on how to build lvgljs on your native platform. They are not complete guides, but include notes on the necessary libraries, compile flags, etc.
### lvgljs
- [ubuntu build Notes for sdl simulator](https://github.com/lvgl/lv_binding_js/blob/master/doc/build/build-ubuntu-arm.md)
- [macos x86 build Notes for sdl simulator](https://github.com/lvgl/lv_binding_js/blob/master/doc/build/build-macos-x86-simulator.md)
- [ubuntu build Notes for platform arm](https://github.com/lvgl/lv_binding_js/blob/master/doc/build/build-ubuntu-x86-simualtor.md)
### JS Bundle
- [JS Bundle build Notes](https://github.com/lvgl/lv_binding_js/blob/master/doc/build/js-bundle.md)
## Components
- [View](https://github.com/lvgl/lv_binding_js/blob/master/doc/component/View.md)
- [Image](https://github.com/lvgl/lv_binding_js/blob/master/doc/component/Image.md)
- [Button](https://github.com/lvgl/lv_binding_js/blob/master/doc/component/Button.md)
- [Text](https://github.com/lvgl/lv_binding_js/blob/master/doc/component/Text.md)
- [Input](https://github.com/lvgl/lv_binding_js/blob/master/doc/component/Input.md)
- [Textarea](https://github.com/lvgl/lv_binding_js/blob/master/doc/component/Textarea.md)
- [Switch](https://github.com/lvgl/lv_binding_js/blob/master/doc/component/Switch.md)
- [Checkbox](https://github.com/lvgl/lv_binding_js/blob/master/doc/component/Checkbox.md)
- [Dropdownlist](https://github.com/lvgl/lv_binding_js/blob/master/doc/component/Dropdownlist.md)
- [ProgressBar](https://github.com/lvgl/lv_binding_js/blob/master/doc/component/ProgressBar.md)
- [Line](https://github.com/lvgl/lv_binding_js/blob/master/doc/component/Line.md)
- [Roller](https://github.com/lvgl/lv_binding_js/blob/master/doc/component/Roller.md)
- [Keyboard](https://github.com/lvgl/lv_binding_js/blob/master/doc/component/Keyboard.md)
- [Calendar](https://github.com/lvgl/lv_binding_js/blob/master/doc/component/Calendar.md)
- [Chart](https://github.com/lvgl/lv_binding_js/blob/master/doc/component/Chart.md)
## Font
[Buitin-Symbol](https://github.com/lvgl/lv_binding_js/blob/master/doc/Symbol/symbol.md)
## Animation
[Animation](https://github.com/lvgl/lv_binding_js/blob/master/doc/animate/animate.md)
## Style
- [position-size-layout](https://github.com/lvgl/lv_binding_js/blob/master/doc/style/position-size-layout.md)
- [boxing-model](https://github.com/lvgl/lv_binding_js/blob/master/doc/style/boxing-model.md)
- [color](https://github.com/lvgl/lv_binding_js/blob/master/doc/style/color.md)
- [flex](https://github.com/lvgl/lv_binding_js/blob/master/doc/style/flex.md)
- [grid](https://github.com/lvgl/lv_binding_js/blob/master/doc/style/grid.md)
- [font](https://github.com/lvgl/lv_binding_js/blob/master/doc/style/font.md)
- [opacity](https://github.com/lvgl/lv_binding_js/blob/master/doc/style/opacity.md)
- [display](https://github.com/lvgl/lv_binding_js/blob/master/doc/style/display.md)
- [background](https://github.com/lvgl/lv_binding_js/blob/master/doc/style/background.md)
- [scroll](https://github.com/lvgl/lv_binding_js/blob/master/doc/style/scroll.md)
- [shadow](https://github.com/lvgl/lv_binding_js/blob/master/doc/style/shadow.md)
- [recolor](https://github.com/lvgl/lv_binding_js/blob/master/doc/style/recolor.md)
- [line](https://github.com/lvgl/lv_binding_js/blob/master/doc/style/line.md)
- [transition](https://github.com/lvgl/lv_binding_js/blob/master/doc/style/transition.md)
- [transform](https://github.com/lvgl/lv_binding_js/blob/master/doc/style/transform.md)
## JSAPI
- [network](https://github.com/lvgl/lv_binding_js/blob/master/doc/jsapi/network.md)
- [filesystem](https://github.com/lvgl/lv_binding_js/blob/master/doc/jsapi/fs.md)
- [dimension](https://github.com/lvgl/lv_binding_js/blob/master/doc/jsapi/dimension.md)
## Thanks
lvgljs depends on following excellent work
[lvgl](https://github.com/lvgl/lvgl): Create beautiful UIs for any MCU, MPU and display type
[QuickJS](https://bellard.org/quickjs/): JavaScript engine
[libuv](https://github.com/libuv/libuv): platform abstraction layer
[curl](https://github.com/curl/curl): HTTP client
[txiki.js](https://github.com/saghul/txiki.js): Tiny JavaScript runtime
docs/get-started/bindings/javascript.rst
+133
View File
@@ -0,0 +1,133 @@
==========
JavaScript
==========
With `lv_binding_js <https://github.com/lvgl/lv_binding_js>`__ you can
write lvgl with JavaScript.
It uses React’s virtual DOM concept to manipulate lvgl UI components,
providing a familiar React-like experience to users.
**Code**
**Code Runing on Real Device**
Table of Contents
-----------------
- `Features <#features>`__
- `Demo <#demo>`__
- `Building <#building>`__
- `Components <#components>`__
- `Font <#font>`__
- `Animation <#animation>`__
- `Style <#style>`__
- `JSAPI <#jsapi>`__
- `Thanks <#thanks>`__
Features
--------
- Support all lvgl built-in components
- Fully suport lvgl flex and grid style
- support most lvgl style，just write like html5 css
- support dynamic load image
- Fully support lvgl animation
Demo
----
See the
`demo <https://github.com/lvgl/lv_binding_js/tree/master/demo>`__ folder
Building
--------
The following are developer notes on how to build lvgljs on your native
platform. They are not complete guides, but include notes on the
necessary libraries, compile flags, etc.
lvgljs
~~~~~~
- `ubuntu build Notes for sdl
simulator <https://github.com/lvgl/lv_binding_js/blob/master/doc/build/build-ubuntu-arm.md>`__
- `macos x86 build Notes for sdl
simulator <https://github.com/lvgl/lv_binding_js/blob/master/doc/build/build-macos-x86-simulator.md>`__
- `ubuntu build Notes for platform
arm <https://github.com/lvgl/lv_binding_js/blob/master/doc/build/build-ubuntu-x86-simualtor.md>`__
JS Bundle
~~~~~~~~~
- `JS Bundle build
Notes <https://github.com/lvgl/lv_binding_js/blob/master/doc/build/js-bundle.md>`__
Components
----------
- `View <https://github.com/lvgl/lv_binding_js/blob/master/doc/component/View.md>`__
- `Image <https://github.com/lvgl/lv_binding_js/blob/master/doc/component/Image.md>`__
- `Button <https://github.com/lvgl/lv_binding_js/blob/master/doc/component/Button.md>`__
- `Text <https://github.com/lvgl/lv_binding_js/blob/master/doc/component/Text.md>`__
- `Input <https://github.com/lvgl/lv_binding_js/blob/master/doc/component/Input.md>`__
- `Textarea <https://github.com/lvgl/lv_binding_js/blob/master/doc/component/Textarea.md>`__
- `Switch <https://github.com/lvgl/lv_binding_js/blob/master/doc/component/Switch.md>`__
- `Checkbox <https://github.com/lvgl/lv_binding_js/blob/master/doc/component/Checkbox.md>`__
- `Dropdownlist <https://github.com/lvgl/lv_binding_js/blob/master/doc/component/Dropdownlist.md>`__
- `ProgressBar <https://github.com/lvgl/lv_binding_js/blob/master/doc/component/ProgressBar.md>`__
- `Line <https://github.com/lvgl/lv_binding_js/blob/master/doc/component/Line.md>`__
- `Roller <https://github.com/lvgl/lv_binding_js/blob/master/doc/component/Roller.md>`__
- `Keyboard <https://github.com/lvgl/lv_binding_js/blob/master/doc/component/Keyboard.md>`__
- `Calendar <https://github.com/lvgl/lv_binding_js/blob/master/doc/component/Calendar.md>`__
- `Chart <https://github.com/lvgl/lv_binding_js/blob/master/doc/component/Chart.md>`__
Font
----
`Buitin-Symbol <https://github.com/lvgl/lv_binding_js/blob/master/doc/Symbol/symbol.md>`__
Animation
---------
`Animation <https://github.com/lvgl/lv_binding_js/blob/master/doc/animate/animate.md>`__
Style
-----
.. include::https://github.com/lvgl/lv_binding_js/blob/master/doc/style/position-size-layout.md
- `position-size-layout <https://github.com/lvgl/lv_binding_js/blob/master/doc/style/position-size-layout.md>`__
- `boxing-model <https://github.com/lvgl/lv_binding_js/blob/master/doc/style/boxing-model.md>`__
- `color <https://github.com/lvgl/lv_binding_js/blob/master/doc/style/color.md>`__
- `flex <https://github.com/lvgl/lv_binding_js/blob/master/doc/style/flex.md>`__
- `grid <https://github.com/lvgl/lv_binding_js/blob/master/doc/style/grid.md>`__
- `font <https://github.com/lvgl/lv_binding_js/blob/master/doc/style/font.md>`__
- `opacity <https://github.com/lvgl/lv_binding_js/blob/master/doc/style/opacity.md>`__
- `display <https://github.com/lvgl/lv_binding_js/blob/master/doc/style/display.md>`__
- `background <https://github.com/lvgl/lv_binding_js/blob/master/doc/style/background.md>`__
- `scroll <https://github.com/lvgl/lv_binding_js/blob/master/doc/style/scroll.md>`__
- `shadow <https://github.com/lvgl/lv_binding_js/blob/master/doc/style/shadow.md>`__
- `recolor <https://github.com/lvgl/lv_binding_js/blob/master/doc/style/recolor.md>`__
- `line <https://github.com/lvgl/lv_binding_js/blob/master/doc/style/line.md>`__
- `transition <https://github.com/lvgl/lv_binding_js/blob/master/doc/style/transition.md>`__
- `transform <https://github.com/lvgl/lv_binding_js/blob/master/doc/style/transform.md>`__
JSAPI
-----
- `network <https://github.com/lvgl/lv_binding_js/blob/master/doc/jsapi/network.md>`__
- `filesystem <https://github.com/lvgl/lv_binding_js/blob/master/doc/jsapi/fs.md>`__
- `dimension <https://github.com/lvgl/lv_binding_js/blob/master/doc/jsapi/dimension.md>`__
Thanks
------
lvgljs depends on following excellent work
`lvgl <https://github.com/lvgl/lvgl>`__: Create beautiful UIs for any
MCU, MPU and display type `QuickJS <https://bellard.org/quickjs/>`__:
JavaScript engine `libuv <https://github.com/libuv/libuv>`__: platform
abstraction layer `curl <https://github.com/curl/curl>`__: HTTP client
`txiki.js <https://github.com/saghul/txiki.js>`__: Tiny JavaScript
runtime
docs/get-started/bindings/micropython.md
-193
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@@ -1,193 +0,0 @@
# Micropython
## What is Micropython?
[Micropython](http://micropython.org/) is Python for microcontrollers.
Using Micropython, you can write Python3 code and run it even on a bare metal architecture with limited resources.
### Highlights of Micropython
- **Compact** - Fits and runs within just 256k of code space and 16k of RAM. No OS is needed, although you can also run it with an OS, if you want.
- **Compatible** - Strives to be as compatible as possible with normal Python (known as CPython).
- **Versatile** - Supports many architectures (x86, x86-64, ARM, ARM Thumb, Xtensa).
- **Interactive** - No need for the compile-flash-boot cycle. With the REPL (interactive prompt) you can type commands and execute them immediately, run scripts, etc.
- **Popular** - Many platforms are supported. The user base is growing bigger. Notable forks: [MicroPython](https://github.com/micropython/micropython), [CircuitPython](https://github.com/adafruit/circuitpython), [MicroPython_ESP32_psRAM_LoBo](https://github.com/loboris/MicroPython_ESP32_psRAM_LoBo)
- **Embedded Oriented** - Comes with modules specifically for embedded systems, such as the [machine module](https://docs.micropython.org/en/latest/library/machine.html#classes) for accessing low-level hardware (I/O pins, ADC, UART, SPI, I2C, RTC, Timers etc.)
---
## Why Micropython + LVGL?
Micropython [does not have a good native high-level GUI library](https://forum.micropython.org/viewtopic.php?f=18&t=5543). LVGL is an [Object-Oriented Component Based](https://blog.lvgl.io/2018-12-13/extend-lvgl-objects) high-level GUI library, which seems to be a natural candidate to map into a higher level language, such as Python. LVGL is implemented in C and its APIs are in C.
### Here are some advantages of using LVGL in Micropython:
- Develop GUI in Python, a very popular high level language. Use paradigms such as Object-Oriented Programming.
- Usually, GUI development requires multiple iterations to get things right. With C, each iteration consists of **`Change code` > `Build` > `Flash` > `Run`**.
In Micropython it's just **`Change code` > `Run`** ! You can even run commands interactively using the [REPL](https://en.wikipedia.org/wiki/Read%E2%80%93eval%E2%80%93print_loop) (the interactive prompt)
### Micropython + LVGL could be used for:
- Fast prototyping GUI.
- Shortening the cycle of changing and fine-tuning the GUI.
- Modelling the GUI in a more abstract way by defining reusable composite objects, taking advantage of Python's language features such as Inheritance, Closures, List Comprehension, Generators, Exception Handling, Arbitrary Precision Integers and others.
- Make LVGL accessible to a larger audience. No need to know C to create a nice GUI on an embedded system.
This goes well with [CircuitPython vision](https://learn.adafruit.com/welcome-to-circuitpython/what-is-circuitpython). CircuitPython was designed with education in mind, to make it easier for new or inexperienced users to get started with embedded development.
- Creating tools to work with LVGL at a higher level (e.g. drag-and-drop designer).
---
## So what does it look like?
**TL;DR:** It's very much like the C API, but Object-Oriented for LVGL components.
Let's dive right into an example!
### A simple example
```python
import lvgl as lv
lv.init()
scr = lv.obj()
btn = lv.btn(scr)
btn.align(lv.ALIGN.CENTER, 0, 0)
label = lv.label(btn)
label.set_text('Hello World!')
lv.scr_load(scr)
```
## How can I use it?
### Online Simulator
If you want to experiment with LVGL + Micropython without downloading anything - you can use our online simulator!
It's a fully functional LVGL + Micropython that runs entirely in the browser and allows you to edit a python script and run it.
[Click here to experiment on the online simulator](https://sim.lvgl.io/)
Many [LVGL examples](https://docs.lvgl.io/master/examples.html) are available also for Micropython.
Just click the
<img src="https://user-images.githubusercontent.com/11742638/198729010-35a12e49-4945-414a-8c3e-d32bc95da940.png" align=middle /> link!
### PC Simulator
Micropython is ported to many platforms. One notable port is "unix", which allows you to build and run Micropython (+LVGL) on a Linux machine. (On a Windows machine you might need Virtual Box or WSL or MinGW or Cygwin etc.)
[Click here to know more information about building and running the unix port](https://github.com/lvgl/lv_micropython)
### Embedded Platforms
In the end, the goal is to run it all on an embedded platform.
Both Micropython and LVGL can be used on many embedded architectures. [lv_micropython](https://github.com/lvgl/lv_micropython) is a fork of Micropython+LVGL and currently supports Linux, ESP32, STM32 and RP2. It can be ported to any other platform supported by Micropython.
You would also need display and input drivers. You can either use one of the existing drivers provided with lv_micropython, or you can create your own input/display drivers for your specific hardware.
Drivers can be implemented either in C as a Micropython module, or in pure Python!
lv_micropython already contains these drivers:
- Display drivers:
- SDL on Linux
- ESP32 specific: ILI9341, ILI9488, GC9A01, ST7789, ST7735
- Generic (pure Python): ILI9341, ST7789, ST7735
- Input drivers:
- SDL, XPT2046, FT6X36, ESP32 ADC with resistive touch
## Where can I find more information?
- `lv_micropython` [README](https://github.com/lvgl/lv_micropython)
- `lv_binding_micropython` [README](https://github.com/lvgl/lv_binding_micropython)
- The [LVGL micropython forum](https://forum.lvgl.io/c/micropython) (Feel free to ask anything!)
- At Micropython: [docs](http://docs.micropython.org/en/latest/) and [forum](https://forum.micropython.org/)
- [Blog Post](https://blog.lvgl.io/2019-02-20/micropython-bindings), a little outdated.
## The Micropython Binding is auto generated!
LVGL is a git submodule inside [lv_micropython](https://github.com/lvgl/lv_micropython) (LVGL is a git submodule of [lv_binding_micropython](https://github.com/lvgl/lv_binding_micropython) which is itself a submodule of [lv_micropython](https://github.com/lvgl/lv_micropython)).
When building lv_micropython, the public LVGL C API is scanned and Micropython API is auto-generated. That means that lv_micropython provides LVGL API for **any** LVGL version, and generally does not require code changes as LVGL evolves.
### LVGL C API Coding Conventions
To support the auto-generation of the Python API, the LVGL C API must follow some coding conventions:
- Use `enum`s instead of macros. If inevitable to use `define`s export them with `LV_EXPORT_CONST_INT(defined_value)` right after the `define`.
- In function arguments use `type name[]` declaration for array parameters instead of `type * name`
- Use typed pointers instead of `void *` pointers
- Widget constructor must follow the `lv_<widget_name>_create(lv_obj_t * parent)` pattern.
- Widget members function must start with `lv_<modul_name>` and should receive `lv_obj_t *` as first argument which is a pointer to widget object itself.
- `struct` APIs should follow the widgets' conventions. That is to receive a pointer to the `struct` as the first argument, and the prefix of the `struct` name should be used as the prefix of the function name too (e.g. `lv_disp_set_default(lv_disp_t * disp)`)
- Functions and `struct`s which are not part of the public API must begin with underscore in order to mark them as "private".
- Argument must be named in H files too.
- Do not `malloc` into a static or global variables. Instead declare the variable in `LV_ITERATE_ROOTS` list in `lv_gc.h` and mark the variable with `GC_ROOT(variable)` when it's used.
**See [Memory Management](#memory-management)**
- To register and use callbacks one of the followings needs to be followed. **See [Callbacks](#callbacks)**
- Pass a pointer to a `struct` as the first argument of both the registration function and the callback. That `struct` must contain `void * user_data` field.
- The last argument of the registration function must be `void * user_data` and the same `user_data` needs to be passed as the last argument of the callback.
Most of these rules are simple and straightforward but there are two related concepts that worth a deeper look: **Memory Management** and **Callbacks**.
### Memory Management
When LVGL runs in Micropython, all dynamic memory allocations (`lv_malloc`) are handled by Micropython's memory manager which is [garbage-collected](https://en.wikipedia.org/wiki/Garbage_collection_(computer_science)) (GC).
To prevent GC from collecting memory prematurely, all dynamic allocated RAM must be reachable by GC.
GC is aware of most allocations, except from pointers on the [Data Segment](https://en.wikipedia.org/wiki/Data_segment):
- Pointers which are global variables
- Pointers which are static global variables
- Pointers which are static local variables
Such pointers need to be defined in a special way to make them reachable by GC
#### Identify The Problem
Problem happens when an allocated memory's pointer (return value of `lv_malloc`) is stored only in either **global**, **static global** or **static local** pointer variable and not as part of a previously allocated `struct` or other variable.
#### Solve The Problem
- Replace the global/static local var with `LV_GC_ROOT(_var)`
- Include `lv_gc.h` on files that use `LV_GC_ROOT`
- Add `_var` to `LV_ITERATE_ROOTS` on `lv_gc.h`
#### Example
https://github.com/lvgl/lvgl/commit/adced46eccfa0437f84aa51aedca4895cc3c679c
#### More Information
- [In the README](https://github.com/lvgl/lv_binding_micropython#memory-management)
- [In the Blog](https://blog.lvgl.io/2019-02-20/micropython-bindings#i-need-to-allocate-a-littlevgl-struct-such-as-style-color-etc-how-can-i-do-that-how-do-i-allocatedeallocate-memory-for-it)
### Callbacks
In C a callback is just a function pointer.
But in Micropython we need to register a *Micropython callable object* for each callback.
Therefore in the Micropython binding we need to register both a function pointer and a Micropython object for every callback.
Therefore we defined a **callback convention** for the LVGL C API that expects lvgl headers to be defined in a certain way. Callbacks that are declared according to the convention would allow the binding to register a Micropython object next to the function pointer when registering a callback, and access that object when the callback is called.
The basic idea is that we have `void * user_data` field that is used automatically by the Micropython Binding to save the *Micropython callable object* for a callback. This field must be provided when registering the function pointer, and provided to the callback function itself.
Although called "user_data", the user is not expectd to read/write that field. Instead, the Micropython glue code uses `user_data` to automatically keep track of the Micropython callable object. The glue code updates it when the callback is registered, and uses it when the callback is called in order to invoke a call to the original callable object.
There are a few options for defining a callback in LVGL C API:
- Option 1: `user_data` in a struct
- There's a struct that contains a field called `void * user_data`
- A pointer to that struct is provided as the **first** argument of a callback registration function
- A pointer to that struct is provided as the **first** argument of the callback itself
- Option 2: `user_data` as a function argument
- A parameter called `void * user_data` is provided to the registration function as the **last** argument
- The callback itself recieves `void *` as the **last** argument
- Option 3: both callback and `user_data` are struct fields
- The API exposes a struct with both function pointer member and `user_data` member
- The function pointer member receives the same struct as its **first** argument
In practice it's also possible to mix these options, for example provide a struct pointer when registering a callback (option 1) and provide `user_data` argument when calling the callback (options 2), **as long as the same `user_data` that was registered is passed to the callback when it's called**.
#### Examples
- [lv_anim_t](https://github.com/lvgl/lvgl/blob/5d50fbc066938d1a4eb43a8366cf83fbd4ce29f2/src/misc/lv_anim.h#L73-L100) contains `user_data` field.
[lv_anim_set_path_cb](https://github.com/lvgl/lvgl/blob/5d50fbc066938d1a4eb43a8366cf83fbd4ce29f2/src/misc/lv_anim.h#L197) registers `path_cb` callback. Both `lv_anim_set_path_cb` and [`lv_anim_path_cb_t`](https://github.com/lvgl/lvgl/blob/5d50fbc066938d1a4eb43a8366cf83fbd4ce29f2/src/misc/lv_anim.h#L46) recieve `lv_anim_t` as their first argument
- [`path_cb` field](https://github.com/lvgl/lvgl/blob/5d50fbc066938d1a4eb43a8366cf83fbd4ce29f2/src/misc/lv_anim.h#L83) can also be assigned directly in the Python code because it's a member of `lv_anim_t` which contains `user_data` field, and [`lv_anim_path_cb_t`](https://github.com/lvgl/lvgl/blob/5d50fbc066938d1a4eb43a8366cf83fbd4ce29f2/src/misc/lv_anim.h#L46) recieve `lv_anim_t` as its first argument.
- [`lv_imgfont_create`](https://github.com/lvgl/lvgl/blob/5d50fbc066938d1a4eb43a8366cf83fbd4ce29f2/src/others/imgfont/lv_imgfont.h#L43) registers `path_cb` and recieves `user_data` as the last argument. The callback [`lv_imgfont_get_path_cb_t`](https://github.com/lvgl/lvgl/blob/5d50fbc066938d1a4eb43a8366cf83fbd4ce29f2/src/others/imgfont/lv_imgfont.h#L29-L31) also receieves the `user_data` as the last argument.
#### More Information
- In the [Blog](https://blog.lvgl.io/2019-08-05/micropython-pure-display-driver#using-callbacks) and in the [README](https://github.com/lvgl/lv_binding_micropython#callbacks)
- [[v6.0] Callback conventions #1036](https://github.com/lvgl/lvgl/issues/1036)
- Various discussions: [here](https://github.com/lvgl/lvgl/pull/3294#issuecomment-1184895335) and [here](https://github.com/lvgl/lvgl/issues/1763#issuecomment-762247629) and [here](https://github.com/lvgl/lvgl/issues/316#issuecomment-467221587)
docs/get-started/bindings/micropython.rst
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.. _micropython:
===========
Micropython
===========
What is Micropython?
--------------------
`Micropython <http://micropython.org/>`__ is Python for
microcontrollers. Using Micropython, you can write Python3 code and run
it even on a bare metal architecture with limited resources.
Highlights of Micropython
~~~~~~~~~~~~~~~~~~~~~~~~~
- **Compact**: Fits and runs within just 256k of code space and 16k of RAM. No OS is needed, although you
can also run it with an OS, if you want.
- **Compatible**: Strives to be as compatible as possible with normal Python (known as CPython).
- **Versatile**: Supports many architectures (x86, x86-64, ARM, ARM Thumb, Xtensa).
- **Interactive**: No need for the compile-flash-boot cycle. With the REPL (interactive prompt) you can type
commands and execute them immediately, run scripts, etc.
- **Popular**: Many platforms are supported. The user base is growing bigger. Notable forks:
- `MicroPython <https://github.com/micropython/micropython>`__
- `CircuitPython <https://github.com/adafruit/circuitpython>`__
- `MicroPython_ESP32_psRAM_LoBo <https://github.com/loboris/MicroPython_ESP32_psRAM_LoBo>`__
- **Embedded Oriented**: Comes with modules specifically for embedded systems, such as the
`machine module <https://docs.micropython.org/en/latest/library/machine.html#classes>`__
for accessing low-level hardware (I/O pins, ADC, UART, SPI, I2C, RTC, Timers etc.)
--------------
Why Micropython + LVGL?
-----------------------
Micropython `does not have a good native high-level GUI library <https://forum.micropython.org/viewtopic.php?f=18&t=5543>`__.
LVGL is an `Object-Oriented Component Based <https://blog.lvgl.io/2018-12-13/extend-lvgl-objects>`__
high-level GUI library, which seems to be a natural candidate to map into a higher level language, such as Python.
LVGL is implemented in C and its APIs are in C.
Here are some advantages of using LVGL in Micropython:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- Develop GUI in Python, a very popular high level language. Use paradigms such as Object-Oriented Programming.
- Usually, GUI development requires multiple iterations to get things right. With C, each iteration consists of
**``Change code`` > ``Build`` > ``Flash`` > ``Run``**. In Micropython it's just
**``Change code`` > ``Run``** ! You can even run commands interactively using the
`REPL <https://en.wikipedia.org/wiki/Read%E2%80%93eval%E2%80%93print_loop>`__ (the interactive prompt)
Micropython + LVGL could be used for:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- Fast prototyping GUI.
- Shortening the cycle of changing and fine-tuning the GUI.
- Modelling the GUI in a more abstract way by defining reusable composite objects, taking advantage of Python's language features
such as Inheritance, Closures, List Comprehension, Generators, Exception Handling, Arbitrary Precision Integers and others.
- Make LVGL accessible to a larger audience. No need to know C to create a nice GUI on an embedded system. This goes well with
`CircuitPython vision <https://learn.adafruit.com/welcome-to-circuitpython/what-is-circuitpython>`__.
CircuitPython was designed with education in mind, to make it easier for new or inexperienced users to get started with
embedded development.
- Creating tools to work with LVGL at a higher level (e.g. drag-and-drop designer).
--------------
So what does it look like?
--------------------------
It's very much like the C API, but Object-Oriented for LVGL components.
Let's dive right into an example!
A simple example
~~~~~~~~~~~~~~~~
.. code:: python
import lvgl as lv
lv.init()
scr = lv.obj()
btn = lv.btn(scr)
btn.align(lv.ALIGN.CENTER, 0, 0)
label = lv.label(btn)
label.set_text('Hello World!')
lv.scr_load(scr)
How can I use it?
-----------------
Online Simulator
~~~~~~~~~~~~~~~~
If you want to experiment with LVGL + Micropython without downloading
anything - you can use our online simulator! It's a fully functional
LVGL + Micropython that runs entirely in the browser and allows you to
edit a python script and run it.
`Click here to experiment on the online simulator <https://sim.lvgl.io/>`__
Many `LVGL examples <https://docs.lvgl.io/master/examples.html>`__ are available also for Micropython. Just click the link!
PC Simulator
~~~~~~~~~~~~
Micropython is ported to many platforms. One notable port is “unix”, which allows you to build and run Micropython
(+LVGL) on a Linux machine. (On a Windows machine you might need Virtual Box or WSL or MinGW or Cygwin etc.)
`Click here to know more information about building and running the unix port <https://github.com/lvgl/lv_micropython>`__
Embedded Platforms
~~~~~~~~~~~~~~~~~~
In the end, the goal is to run it all on an embedded platform. Both Micropython and LVGL can be used on many embedded
architectures. `lv_micropython <https://github.com/lvgl/lv_micropython>`__ is a fork of Micropython+LVGL and currently
supports Linux, ESP32, STM32 and RP2. It can be ported to any other platform supported by Micropython.
- You would also need display and input drivers. You can either use one of the existing drivers provided with lv_micropython,
or you can create your own input/display drivers for your specific hardware.
- Drivers can be implemented either in C as a Micropython module, or in pure Python!
lv_micropython already contains these drivers:
- Display drivers:
- SDL on Linux
- ESP32 specific:
- ILI9341
- ILI9488
- GC9A01
- ST7789
- ST7735
- Generic (pure Python):
- ILI9341
- ST7789
- ST7735
- Input drivers:
- SDL
- XPT2046
- FT6X36
- ESP32 ADC with resistive touch
Where can I find more information?
----------------------------------
- ``lv_micropython`` `README <https://github.com/lvgl/lv_micropython>`__
- ``lv_binding_micropython`` `README <https://github.com/lvgl/lv_binding_micropython>`__
- The `LVGL micropython forum <https://forum.lvgl.io/c/micropython>`__ (Feel free to ask anything!)
- At Micropython: `docs <http://docs.micropython.org/en/latest/>`__ and `forum <https://forum.micropython.org/>`__
- `Blog Post <https://blog.lvgl.io/2019-02-20/micropython-bindings>`__, a little outdated.
The Micropython Binding is auto generated!
------------------------------------------
- LVGL is a git submodule inside `lv_micropython <https://github.com/lvgl/lv_micropython>`__
(LVGL is a git submodule of `lv_binding_micropython <https://github.com/lvgl/lv_binding_micropython>`__
which is itself a submodule of `lv_micropython <https://github.com/lvgl/lv_micropython>`__).
- When building lv_micropython, the public LVGL C API is scanned and Micropython API is auto-generated. That means that
lv_micropython provides LVGL API for **any** LVGL version, and generally does not require code changes as LVGL evolves.
LVGL C API Coding Conventions
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
To support the auto-generation of the Python API, the LVGL C API must
follow some coding conventions:
- Use ``enum``\ s instead of macros. If inevitable to use ``define``\ s
export them with :cpp:expr:`LV_EXPORT_CONST_INT(defined_value)` right after the ``define``.
- In function arguments use ``type name[]`` declaration for array parameters instead of :cpp:expr:`type * name`
- Use typed pointers instead of :cpp:expr:`void *` pointers
- Widget constructor must follow the ``lv_<widget_name>_create(lv_obj_t * parent)`` pattern.
- Widget members function must start with ``lv_<modul_name>`` and should receive :cpp:expr:`lv_obj_t *` as first
argument which is a pointer to widget object itself.
- ``struct`` APIs should follow the widgets' conventions. That is to receive a pointer to the ``struct`` as the
first argument, and the prefix of the ``struct`` name should be used as the prefix of the
function name too (e.g. :cpp:expr:`lv_disp_set_default(lv_disp_t * disp)`)
- Functions and ``struct``\ s which are not part of the public API must begin with underscore in order to mark them as “private”.
- Argument must be named in H files too.
- Do not ``malloc`` into a static or global variables. Instead declare the variable in :c:macro:`LV_ITERATE_ROOTS`
list in ``lv_gc.h`` and mark the variable with :cpp:expr:`GC_ROOT(variable)` when it's used. **See** :ref:`memory_management`
- To register and use callbacks one of the followings needs to be followed. **See** :ref:`callbacks`
- Pass a pointer to a ``struct`` as the first argument of both the registration function and the callback. That
``struct`` must contain ``void * user_data`` field.
- The last argument of the registration function must be ``void * user_data`` and the same ``user_data``
needs to be passed as the last argument of the callback.
Most of these rules are simple and straightforward but there are two related concepts that worth a deeper look:
:ref:`memory_management` and :ref:`callbacks`.
.. _memory_management:
Memory Management
~~~~~~~~~~~~~~~~~
| When LVGL runs in Micropython, all dynamic memory allocations (:cpp:func:`lv_malloc`) are handled by Micropython's memory
manager which is `garbage-collected <https://en.wikipedia.org/wiki/Garbage_collection_(computer_science)>`__ (GC).
| To prevent GC from collecting memory prematurely, all dynamic allocated RAM must be reachable by GC.
| GC is aware of most allocations, except from pointers on the `Data Segment <https://en.wikipedia.org/wiki/Data_segment>`__:
- Pointers which are global variables
- Pointers which are static global variables
- Pointers which are static local variables
Such pointers need to be defined in a special way to make them reachable by GC
Identify The Problem
^^^^^^^^^^^^^^^^^^^^
Problem happens when an allocated memory's pointer (return value of :cpp:func:`lv_malloc`) is stored only in either **global**,
**static global** or **static local** pointer variable and not as part of a previously allocated ``struct`` or other variable.
Solve The Problem
^^^^^^^^^^^^^^^^^
- Replace the global/static local var with :cpp:expr:`LV_GC_ROOT(_var)`
- Include ``lv_gc.h`` on files that use :c:macro:`LV_GC_ROOT`
- Add ``_var`` to :c:macro:`LV_ITERATE_ROOTS` on ``lv_gc.h``
Example
^^^^^^^
https://github.com/lvgl/lvgl/commit/adced46eccfa0437f84aa51aedca4895cc3c679c
More Information
^^^^^^^^^^^^^^^^
- `In the README <https://github.com/lvgl/lv_binding_micropython#memory-management>`__
- `In the Blog <https://blog.lvgl.io/2019-02-20/micropython-bindings#i-need-to-allocate-a-littlevgl-struct-such-as-style-color-etc-how-can-i-do-that-how-do-i-allocatedeallocate-memory-for-it>`__
.. _callbacks:
Callbacks
~~~~~~~~~
In C a callback is just a function pointer. But in Micropython we need to register a *Micropython callable object* for each
callback. Therefore in the Micropython binding we need to register both a function pointer and a Micropython object for every callback.
Therefore we defined a **callback convention** for the LVGL C API that expects lvgl headers to be defined in a certain
way. Callbacks that are declared according to the convention would allow the binding to register a Micropython object
next to the function pointer when registering a callback, and access that object when the callback is called.
- The basic idea is that we have ``void * user_data`` field that is used automatically by the Micropython Binding
to save the *Micropython callable object* for a callback. This field must be provided when registering the function
pointer, and provided to the callback function itself.
- Although called "user_data", the user is not expectd to read/write that field. Instead, the Micropython glue code uses
``user_data`` to automatically keep track of the Micropython callable object. The glue code updates it when the callback
is registered, and uses it when the callback is called in order to invoke a call to the original callable object.
There are a few options for defining a callback in LVGL C API:
- Option 1: ``user_data`` in a struct
- There's a struct that contains a field called ``void * user_data``
- A pointer to that struct is provided as the **first** argument of a callback registration function
- A pointer to that struct is provided as the **first** argument of the callback itself
- Option 2: ``user_data`` as a function argument
- A parameter called ``void * user_data`` is provided to the registration function as the **last** argument
- The callback itself recieves ``void *`` as the **last** argument
- Option 3: both callback and ``user_data`` are struct fields
- The API exposes a struct with both function pointer member and ``user_data`` member
- The function pointer member receives the same struct as its **first** argument
In practice it's also possible to mix these options, for example provide a struct pointer when registering a callback
(option 1) and provide ``user_data`` argument when calling the callback (options 2),
**as long as the same ``user_data`` that was registered is passed to the callback when it's called**.
Examples
^^^^^^^^
- :cpp:type:`lv_anim_t` contains ``user_data`` field. :cpp:func:`lv_anim_set_path_cb`
registers `path_cb` callback. Both ``lv_anim_set_path_cb`` and :cpp:type:`lv_anim_path_cb_t`
recieve :cpp:type:`lv_anim_t` as their first argument
- ``path_cb`` field can also be assigned directly in the Python code because it's a member
of :cpp:type:`lv_anim_t` which contains ``user_data`` field, and :cpp:type:`lv_anim_path_cb_t`
recieve :cpp:type:`lv_anim_t` as its first argument.
- :cpp:func:`lv_imgfont_create` registers ``path_cb`` and recieves ``user_data`` as the last
argument. The callback :cpp:func:`lv_imgfont_get_path_cb_t` also receieves the ``user_data`` as the last argument.
.. _more-information-1:
More Information
^^^^^^^^^^^^^^^^
- In the `Blog <https://blog.lvgl.io/2019-08-05/micropython-pure-display-driver#using-callbacks>`__
and in the `README <https://github.com/lvgl/lv_binding_micropython#callbacks>`__
- `[v6.0] Callback conventions #1036 <https://github.com/lvgl/lvgl/issues/1036>`__
- Various discussions: `here <https://github.com/lvgl/lvgl/pull/3294#issuecomment-1184895335>`__
and `here <https://github.com/lvgl/lvgl/issues/1763#issuecomment-762247629>`__
and`here <https://github.com/lvgl/lvgl/issues/316#issuecomment-467221587>`__
docs/get-started/bindings/pikascript.md
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@@ -1,162 +0,0 @@
# PikaScript
## What is PikaScript ?
[PikaScript](https://github.com/pikasTech/pikascript) is a Python interpreter designed specifically for microcontrollers, and it supports a subset of the common Python3 syntax.
It's lighter, requiring only 32k of code space and 4k of RAM, which means it can run on stm32f103c8 (blue-pill) or even stm32g030c8, on the other hand, you can leave valuable space for more material or larger buffer areas.
It is simpler, out of the box, runs with no porting and configuration at all, does not depend on OS or file system, has good support for popular IDEs for Windows platforms like Keil, IAR, RT-Thread-Studio, and of course, supports linux-gcc development platforms.
It's smarter, with a unique C module mechanism that allows you to generate bindings automatically by simply writing the API for the C module in Python, and you don't need to deal with the headache of writing any macros or global tables manually. On the other hand, all C modules have sophisticated smart hints, even hinting at the types of your arguments .
---
## Why PikaScript + LVGL ?
PikaScript now supports the main features of LVGL8, and these APIs are fully compatible with Micropython!
This means that you can continue to use already written code from Micropython, and then use less code space and RAM.
Enjoy detailed code hints down to the parameter type for a better programming experience
Use a more convenient IDE, such as vs-based simulation projects
## So how does it look like?
Here are some examples of lvgl that PikaScript can already run, they are mainly from the lvgl documentation examples
### LV_ARC
```python
import pika_lvgl as lv
import PikaStdLib
mem = PikaStdLib.MemChecker()
# Create an Arc
arc = lv.arc(lv.scr_act())
arc.set_end_angle(200)
arc.set_size(150, 150)
arc.center()
print('mem used max: %0.2f kB' % (mem.getMax()))
print('mem used now: %0.2f kB' % (mem.getNow()))
```
### LV_BAR
``` python
import pika_lvgl as lv
import PikaStdLib
mem = PikaStdLib.MemChecker()
bar1 = lv.bar(lv.scr_act())
bar1.set_size(200, 20)
bar1.center()
bar1.set_value(70, lv.ANIM.OFF)
print('mem used max: %0.2f kB' % (mem.getMax()))
print('mem used now: %0.2f kB' % (mem.getNow()))
```
### LV_BTN
``` python
import pika_lvgl as lv
import PikaStdLib
mem = PikaStdLib.MemChecker()
def event_cb_1(evt):
print('in evt1')
print('mem used now: %0.2f kB' % (mem.getNow()))
def event_cb_2(evt):
print('in evt2')
print('mem used now: %0.2f kB' % (mem.getNow()))
btn1 = lv.btn(lv.scr_act())
btn1.align(lv.ALIGN.TOP_MID, 0, 10)
btn2 = lv.btn(lv.scr_act())
btn2.align(lv.ALIGN.TOP_MID, 0, 50)
btn1.add_event(event_cb_1, lv.EVENT.CLICKED, 0)
btn2.add_event(event_cb_2, lv.EVENT.CLICKED, 0)
print('mem used max: %0.2f kB' % (mem.getMax()))
print('mem used now: %0.2f kB' % (mem.getNow()))
```
### LV_CHECKBOX
``` python
import pika_lvgl as lv
import PikaStdLib
mem = PikaStdLib.MemChecker()
cb = lv.checkbox(lv.scr_act())
cb.set_text("Apple")
cb.align(lv.ALIGN.TOP_LEFT, 0 ,0)
cb = lv.checkbox(lv.scr_act())
cb.set_text("Banana")
cb.add_state(lv.STATE.CHECKED)
cb.align(lv.ALIGN.TOP_LEFT, 0 ,30)
cb = lv.checkbox(lv.scr_act())
cb.set_text("Lemon")
cb.add_state(lv.STATE.DISABLED)
cb.align(lv.ALIGN.TOP_LEFT, 0 ,60)
cb = lv.checkbox(lv.scr_act())
cb.add_state(lv.STATE.CHECKED | lv.STATE.DISABLED)
cb.set_text("Melon")
cb.align(lv.ALIGN.TOP_LEFT, 0 ,90)
print('mem used max: %0.2f kB' % (mem.getMax()))
print('mem used now: %0.2f kB' % (mem.getNow()))
```
---
## How does it work?
PikaScript has a unique C module smart binding tool
Just write the Python interface in pika_lvgl.pyi (.pyi is the python interface file)
``` python
# pika_lvgl.pyi
class arc(lv_obj):
def set_end_angle(self, angle: int): ...
def set_bg_angles(self, start: int, end: int): ...
def set_angles(self, start: int, end: int): ...
```
Then PikaScript's pre-compiler can automatically bind the following C functions, simply by naming the functions in the module_class_method format, without any additional work, and all binding and registration is done automatically.
``` C
/* pika_lvgl_arc.c */
void pika_lvgl_arc_set_end_angle(PikaObj* self, int angle) {
lv_obj_t* lv_obj = obj_getPtr(self, "lv_obj");
lv_arc_set_end_angle(lv_obj, angle);
}
void pika_lvgl_arc_set_bg_angles(PikaObj *self, int start, int end){
lv_obj_t* lv_obj = obj_getPtr(self, "lv_obj");
lv_arc_set_bg_angles(lv_obj, start, end);
}
void pika_lvgl_arc_set_angles(PikaObj *self, int start, int end){
lv_obj_t* lv_obj = obj_getPtr(self, "lv_obj");
lv_arc_set_angles(lv_obj, start, end);
}
```
To use the module, just `import pika_lvgl` and the precompiler will automatically scan main.py and bind the `pika_lvgl` module
```
$ ./rust-msc-latest-win10.exe
(pikascript) packages installed:
pikascript-core==v1.10.0
PikaStdLib==v1.10.0
PikaStdDevice==v1.10.0
(pikascript) pika compiler:
scaning main.py...
binding pika_lvgl.pyi...
```
The precompiler is written in Rust, runs on windows and linux, and is completely open source.
In addition to binding C modules, the precompiler compiles Python scripts to bytecode in the PC, reducing the size of the script and increasing its speed.
---
## How can I use it?
The simulation repo on vs is available on https://github.com/pikasTech/lv_pikascript
---
docs/get-started/bindings/pikascript.rst
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PikaScript
==========
What is PikaScript ?
--------------------
`PikaScript <https://github.com/pikasTech/pikascript>`__ is a Python
interpreter designed specifically for microcontrollers, and it supports
a subset of the common Python3 syntax.
It’s lighter, requiring only 32k of code space and 4k of RAM, which
means it can run on stm32f103c8 (blue-pill) or even stm32g030c8, on the
other hand, you can leave valuable space for more material or larger
buffer areas.
It is simpler, out of the box, runs with no porting and configuration at
all, does not depend on OS or file system, has good support for popular
IDEs for Windows platforms like Keil, IAR, RT-Thread-Studio, and of
course, supports linux-gcc development platforms.
It’s smarter, with a unique C module mechanism that allows you to
generate bindings automatically by simply writing the API for the C
module in Python, and you don’t need to deal with the headache of
writing any macros or global tables manually. On the other hand, all C
modules have sophisticated smart hints, even hinting at the types of
your arguments .
--------------
Why PikaScript + LVGL ?
-----------------------
PikaScript now supports the main features of LVGL8, and these APIs are
fully compatible with Micropython!
This means that you can continue to use already written code from
Micropython, and then use less code space and RAM.
Enjoy detailed code hints down to the parameter type for a better
programming experience
Use a more convenient IDE, such as vs-based simulation projects
So how does it look like?
-------------------------
Here are some examples of lvgl that PikaScript can already run, they are
mainly from the lvgl documentation examples
LV_ARC
~~~~~~
.. code:: python
import pika_lvgl as lv
import PikaStdLib
mem = PikaStdLib.MemChecker()
# Create an Arc
arc = lv.arc(lv.scr_act())
arc.set_end_angle(200)
arc.set_size(150, 150)
arc.center()
print('mem used max: %0.2f kB' % (mem.getMax()))
print('mem used now: %0.2f kB' % (mem.getNow()))
LV_BAR
~~~~~~
.. code:: python
import pika_lvgl as lv
import PikaStdLib
mem = PikaStdLib.MemChecker()
bar1 = lv.bar(lv.scr_act())
bar1.set_size(200, 20)
bar1.center()
bar1.set_value(70, lv.ANIM.OFF)
print('mem used max: %0.2f kB' % (mem.getMax()))
print('mem used now: %0.2f kB' % (mem.getNow()))
LV_BTN
~~~~~~
.. code:: python
import pika_lvgl as lv
import PikaStdLib
mem = PikaStdLib.MemChecker()
def event_cb_1(evt):
print('in evt1')
print('mem used now: %0.2f kB' % (mem.getNow()))
def event_cb_2(evt):
print('in evt2')
print('mem used now: %0.2f kB' % (mem.getNow()))
btn1 = lv.btn(lv.scr_act())
btn1.align(lv.ALIGN.TOP_MID, 0, 10)
btn2 = lv.btn(lv.scr_act())
btn2.align(lv.ALIGN.TOP_MID, 0, 50)
btn1.add_event(event_cb_1, lv.EVENT.CLICKED, 0)
btn2.add_event(event_cb_2, lv.EVENT.CLICKED, 0)
print('mem used max: %0.2f kB' % (mem.getMax()))
print('mem used now: %0.2f kB' % (mem.getNow()))
LV_CHECKBOX
~~~~~~~~~~~
.. code:: python
import pika_lvgl as lv
import PikaStdLib
mem = PikaStdLib.MemChecker()
cb = lv.checkbox(lv.scr_act())
cb.set_text("Apple")
cb.align(lv.ALIGN.TOP_LEFT, 0 ,0)
cb = lv.checkbox(lv.scr_act())
cb.set_text("Banana")
cb.add_state(lv.STATE.CHECKED)
cb.align(lv.ALIGN.TOP_LEFT, 0 ,30)
cb = lv.checkbox(lv.scr_act())
cb.set_text("Lemon")
cb.add_state(lv.STATE.DISABLED)
cb.align(lv.ALIGN.TOP_LEFT, 0 ,60)
cb = lv.checkbox(lv.scr_act())
cb.add_state(lv.STATE.CHECKED | lv.STATE.DISABLED)
cb.set_text("Melon")
cb.align(lv.ALIGN.TOP_LEFT, 0 ,90)
print('mem used max: %0.2f kB' % (mem.getMax()))
print('mem used now: %0.2f kB' % (mem.getNow()))
--------------
How does it work?
-----------------
PikaScript has a unique C module smart binding tool
Just write the Python interface in pika_lvgl.pyi (.pyi is the python
interface file)
.. code:: python
# pika_lvgl.pyi
class arc(lv_obj):
def set_end_angle(self, angle: int): ...
def set_bg_angles(self, start: int, end: int): ...
def set_angles(self, start: int, end: int): ...
Then PikaScript’s pre-compiler can automatically bind the following C
functions, simply by naming the functions in the module_class_method
format, without any additional work, and all binding and registration is
done automatically.
.. code:: c
/* pika_lvgl_arc.c */
void pika_lvgl_arc_set_end_angle(PikaObj* self, int angle) {
lv_obj_t* lv_obj = obj_getPtr(self, "lv_obj");
lv_arc_set_end_angle(lv_obj, angle);
}
void pika_lvgl_arc_set_bg_angles(PikaObj *self, int start, int end){
lv_obj_t* lv_obj = obj_getPtr(self, "lv_obj");
lv_arc_set_bg_angles(lv_obj, start, end);
}
void pika_lvgl_arc_set_angles(PikaObj *self, int start, int end){
lv_obj_t* lv_obj = obj_getPtr(self, "lv_obj");
lv_arc_set_angles(lv_obj, start, end);
}
To use the module, just ``import pika_lvgl`` and the precompiler will
automatically scan main.py and bind the ``pika_lvgl`` module
::
$ ./rust-msc-latest-win10.exe
(pikascript) packages installed:
pikascript-core==v1.10.0
PikaStdLib==v1.10.0
PikaStdDevice==v1.10.0
(pikascript) pika compiler:
scaning main.py...
binding pika_lvgl.pyi...
The precompiler is written in Rust, runs on windows and linux, and is
completely open source.
In addition to binding C modules, the precompiler compiles Python
scripts to bytecode in the PC, reducing the size of the script and
increasing its speed.
--------------
How can I use it?
-----------------
The simulation repo on vs is available on
https://github.com/pikasTech/lv_pikascript
docs/get-started/index.md
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# Get started
There are several ways to get your feet wet with LVGL. Here is one recommended order of documents to read and things to play with when you are learning to use LVGL:
1. Check the [Online demos](https://lvgl.io/demos) to see LVGL in action (3 minutes)
2. Read the [Introduction](https://docs.lvgl.io/master/intro/index.html) page of the documentation (5 minutes)
3. Read the [Quick overview](https://docs.lvgl.io/master/get-started/quick-overview.html) page of the documentation (15 minutes)
4. Set up a [Simulator](https://docs.lvgl.io/master/get-started/platforms/pc-simulator.html) (10 minutes)
5. Try out some [Examples](https://docs.lvgl.io/master/examples.html)
6. Check out the Platform-specific tutorials. (in this section below). (10 minutes)
7. Port LVGL to a board. See the [Porting](https://docs.lvgl.io/master/porting/index.html) guide or check the ready to use [Projects](https://github.com/lvgl?q=lv_port_&type=&language=)
8. Read the [Overview](https://docs.lvgl.io/master/overview/index.html) page to get a better understanding of the library. (2-3 hours)
9. Check the documentation of the [Widgets](https://docs.lvgl.io/master/widgets/index.html) to see their features and usage
10. If you have questions got to the [Forum](http://forum.lvgl.io/)
11. Read the [Contributing](https://docs.lvgl.io/master/CONTRIBUTING.html) guide to see how you can help to improve LVGL (15 minutes)
```eval_rst
.. toctree::
:maxdepth: 2
quick-overview
platforms/index
os/index
bindings/index
```
docs/get-started/index.rst
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===========
Get started
===========
There are several ways to get your feet wet with LVGL. Here is one
recommended order of documents to read and things to play with when you
are learning to use LVGL:
1. Check the `Online demos <https://lvgl.io/demos>`__ to see LVGL in action (3 minutes)
2. Read the :ref:`introduction` page of the documentation (5 minutes)
3. Read the :ref:`quick-overview` page of the documentation (15 minutes)
4. Set up a :ref:`simulator` (10 minutes)
5. Try out some :ref:`examples`
6. Check out the Platform-specific tutorials. (in this section below). (10 minutes)
7. Port LVGL to a board. See the :ref:`porting` guide or check the ready to use `Projects <https://github.com/lvgl?q=lv_port_&type=&language=>`__
8. Read the :ref:`overview` page to get a better understanding of the library. (2-3 hours)
9. Check the documentation of the :ref:`widgets` to see their features and usage
10. If you have questions got to the `Forum <http://forum.lvgl.io/>`__
11. Read the :ref:`contributing` guide to see how you can help to improve LVGL (15 minutes)
.. toctree::
:maxdepth: 2
quick-overview
platforms/index
os/index
bindings/index
docs/get-started/os/freertos.md
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# FreeRTOS
TODO
docs/get-started/os/freertos.rst
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========
FreeRTOS
========
TODO
docs/get-started/os/index.md
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# (RT)OS
```eval_rst
.. toctree::
:maxdepth: 2
nuttx
rt-thread
freertos
zephyr
```
docs/get-started/os/index.rst
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======
(RT)OS
======
.. toctree:: :maxdepth: 2
nuttx
rt-thread
freertos
zephyr
docs/get-started/os/nuttx.md
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# NuttX RTOS
## What is NuttX?
[NuttX](https://nuttx.apache.org/) is a mature and secure real-time operating system (RTOS) with an emphasis on technical standards compliance and small size.
It is scalable from 8-bit to 64-bit microcontrollers and microprocessors and compliant with the Portable Operating System Interface (POSIX) and the American National Standards Institute (ANSI) standards and with many Linux-like subsystems.
The best way to think about NuttX is to think of it as a small Unix/Linux for microcontrollers.
### Highlights of NuttX
- **Small** - Fits and runs in microcontrollers as small as 32 kB Flash and 8 kB of RAM.
- **Compliant** - Strives to be as compatible as possible with POSIX and Linux.
- **Versatile** - Supports many architectures (ARM, ARM Thumb, AVR, MIPS, OpenRISC, RISC-V 32-bit and 64-bit, RX65N, x86-64, Xtensa, Z80/Z180, etc.).
- **Modular** - Its modular design allows developers to select only what really matters and use modules to include new features.
- **Popular** - NuttX is used by many companies around the world. Probably you already used a product with NuttX without knowing it was running NuttX.
- **Predictable** - NuttX is a preemptible Realtime kernel, so you can use it to create predictable applications for realtime control.
---
## Why NuttX + LVGL?
Although NuttX has its own graphic library called [NX](https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=139629474), LVGL is a good alternative because users could find more eye-candy demos and they can reuse code from previous projects.
LVGL is an [Object-Oriented Component Based](https://blog.lvgl.io/2018-12-13/extend-lvgl-objects) high-level GUI library, that could fit very well for a RTOS with advanced features like NuttX.
LVGL is implemented in C and its APIs are in C.
### Here are some advantages of using LVGL in NuttX
- Develop GUI in Linux first and when it is done just compile it for NuttX. Nothing more, no wasting of time.
- Usually, GUI development for low level RTOS requires multiple iterations to get things right, where each iteration consists of **`Change code` > `Build` > `Flash` > `Run`**.
Using LVGL, Linux and NuttX you can reduce this process and just test everything on your computer and when it is done, compile it on NuttX and that is it.
### NuttX + LVGL could be used for
- GUI demos to demonstrate your board graphics capacities.
- Fast prototyping GUI for MVP (Minimum Viable Product) presentation.
- visualize sensor data directly and easily on the board without using a computer.
- Final products with a GUI without a touchscreen (i.e. 3D Printer Interface using Rotary Encoder to Input data).
- Final products with a touchscreen (and all sorts of bells and whistles).
---
## How to get started with NuttX and LVGL?
There are many boards in the [NuttX mainline](https://github.com/apache/incubator-nuttx) with support for LVGL.
Let's use the [STM32F429IDISCOVERY](https://www.st.com/en/evaluation-tools/32f429idiscovery.html) as an example because it is a very popular board.
### First you need to install the pre-requisites on your system
Let's use the [Windows Subsystem for Linux](https://acassis.wordpress.com/2018/01/10/how-to-build-nuttx-on-windows-10/)
```shell
$ sudo apt-get install automake bison build-essential flex gcc-arm-none-eabi gperf git libncurses5-dev libtool libusb-dev libusb-1.0.0-dev pkg-config kconfig-frontends openocd
```
### Now let's create a workspace to save our files
```shell
$ mkdir ~/nuttxspace
$ cd ~/nuttxspace
```
### Clone the NuttX and Apps repositories:
```shell
$ git clone https://github.com/apache/incubator-nuttx nuttx
$ git clone https://github.com/apache/incubator-nuttx-apps apps
```
### Configure NuttX to use the stm32f429i-disco board and the LVGL Demo
```shell
$ ./tools/configure.sh stm32f429i-disco:lvgl
$ make
```
If everything went fine you should have now the file `nuttx.bin` to flash on your board:
```shell
$ ls -l nuttx.bin
-rwxrwxr-x 1 alan alan 287144 Jun 27 09:26 nuttx.bin
```
### Flashing the firmware in the board using OpenOCD:
```shell
$ sudo openocd -f interface/stlink-v2.cfg -f target/stm32f4x.cfg -c init -c "reset halt" -c "flash write_image erase nuttx.bin 0x08000000"
```
Reset the board and using the 'NSH>' terminal start the LVGL demo:
```shell
nsh> lvgldemo
```
## Where can I find more information?
- This blog post: [LVGL on LPCXpresso54628](https://acassis.wordpress.com/2018/07/19/running-nuttx-on-lpcxpresso54628-om13098/)
- NuttX mailing list: [Apache NuttX Mailing List](http://nuttx.incubator.apache.org/community/)
docs/get-started/os/nuttx.rst
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==========
NuttX RTOS
==========
What is NuttX?
--------------
`NuttX <https://nuttx.apache.org/>`__ is a mature and secure real-time
operating system (RTOS) with an emphasis on technical standards
compliance and small size. It is scalable from 8-bit to 64-bit
microcontrollers and microprocessors and compliant with the Portable
Operating System Interface (POSIX) and the American National Standards
Institute (ANSI) standards and with many Linux-like subsystems. The best
way to think about NuttX is to think of it as a small Unix/Linux for
microcontrollers.
Highlights of NuttX
~~~~~~~~~~~~~~~~~~~
- **Small** - Fits and runs in microcontrollers as small as 32 kB Flash
and 8 kB of RAM.
- **Compliant** - Strives to be as compatible as possible with POSIX
and Linux.
- **Versatile** - Supports many architectures (ARM, ARM Thumb, AVR,
MIPS, OpenRISC, RISC-V 32-bit and 64-bit, RX65N, x86-64, Xtensa,
Z80/Z180, etc.).
- **Modular** - Its modular design allows developers to select only
what really matters and use modules to include new features.
- **Popular** - NuttX is used by many companies around the world.
Probably you already used a product with NuttX without knowing it was
running NuttX.
- **Predictable** - NuttX is a preemptible Realtime kernel, so you can
use it to create predictable applications for realtime control.
--------------
Why NuttX + LVGL?
-----------------
Although NuttX has its own graphic library called
`NX <https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=139629474>`__,
LVGL is a good alternative because users could find more eye-candy demos
and they can reuse code from previous projects. LVGL is an
`Object-Oriented Component
Based <https://blog.lvgl.io/2018-12-13/extend-lvgl-objects>`__
high-level GUI library, that could fit very well for a RTOS with
advanced features like NuttX. LVGL is implemented in C and its APIs are
in C.
Here are some advantages of using LVGL in NuttX
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- Develop GUI in Linux first and when it is done just compile it for
NuttX. Nothing more, no wasting of time.
- Usually, GUI development for low level RTOS requires multiple
iterations to get things right, where each iteration consists of
**``Change code`` > ``Build`` > ``Flash`` > ``Run``**. Using LVGL,
Linux and NuttX you can reduce this process and just test everything
on your computer and when it is done, compile it on NuttX and that is
it.
NuttX + LVGL could be used for
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- GUI demos to demonstrate your board graphics capacities.
- Fast prototyping GUI for MVP (Minimum Viable Product) presentation.
- visualize sensor data directly and easily on the board without using
a computer.
- Final products with a GUI without a touchscreen (i.e. 3D Printer
Interface using Rotary Encoder to Input data).
- Final products with a touchscreen (and all sorts of bells and
whistles).
--------------
How to get started with NuttX and LVGL?
---------------------------------------
There are many boards in the `NuttX
mainline <https://github.com/apache/incubator-nuttx>`__ with support for
LVGL. Let’s use the
`STM32F429IDISCOVERY <https://www.st.com/en/evaluation-tools/32f429idiscovery.html>`__
as an example because it is a very popular board.
First you need to install the pre-requisites on your system
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Let’s use the `Windows Subsystem for
Linux <https://acassis.wordpress.com/2018/01/10/how-to-build-nuttx-on-windows-10/>`__
.. code:: shell
$ sudo apt-get install automake bison build-essential flex gcc-arm-none-eabi gperf git libncurses5-dev libtool libusb-dev libusb-1.0.0-dev pkg-config kconfig-frontends openocd
Now let’s create a workspace to save our files
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. code:: shell
$ mkdir ~/nuttxspace
$ cd ~/nuttxspace
Clone the NuttX and Apps repositories:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. code:: shell
$ git clone https://github.com/apache/incubator-nuttx nuttx
$ git clone https://github.com/apache/incubator-nuttx-apps apps
Configure NuttX to use the stm32f429i-disco board and the LVGL Demo
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. code:: shell
$ ./tools/configure.sh stm32f429i-disco:lvgl
$ make
If everything went fine you should have now the file ``nuttx.bin`` to
flash on your board:
.. code:: shell
$ ls -l nuttx.bin
-rwxrwxr-x 1 alan alan 287144 Jun 27 09:26 nuttx.bin
Flashing the firmware in the board using OpenOCD:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. code:: shell
$ sudo openocd -f interface/stlink-v2.cfg -f target/stm32f4x.cfg -c init -c "reset halt" -c "flash write_image erase nuttx.bin 0x08000000"
Reset the board and using the ‘NSH>’ terminal start the LVGL demo:
.. code:: shell
nsh> lvgldemo
Where can I find more information?
----------------------------------
- This blog post: `LVGL on
LPCXpresso54628 <https://acassis.wordpress.com/2018/07/19/running-nuttx-on-lpcxpresso54628-om13098/>`__
- NuttX mailing list: `Apache NuttX Mailing
List <http://nuttx.incubator.apache.org/community/>`__
docs/get-started/os/rt-thread.md
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# RT-Thread RTOS
<img src="https://raw.githubusercontent.com/RT-Thread/rt-thread/master/documentation/figures/logo.png" width=40% style="float: center;" >
## What is RT-Thread?
[**RT-Thread**](https://www.rt-thread.io/) is an [open source](https://github.com/RT-Thread/rt-thread), neutral, and community-based real-time operating system (RTOS). RT-Thread has **Standard version** and **Nano version**. For resource-constrained microcontroller (MCU) systems, the Nano version that requires only 3 KB Flash and 1.2 KB RAM memory resources can be tailored with easy-to-use tools. For resource-rich IoT devices, RT-Thread can use the **online software package** management tool, together with system configuration tools, to achieve intuitive and rapid modular cutting, seamlessly import rich software packages; thus, achieving complex functions like Android's graphical interface and touch sliding effects, smart voice interaction effects, and so on.
### Key features
- Designed for resource-constrained devices, the minimum kernel requires only 1.2KB of RAM and 3 KB of Flash.
- A variety of standard interfaces, such as POSIX, CMSIS, C++ application environment.
- Has rich components and a prosperous and fast growing <a href="https://packages.rt-thread.org/en/">package ecosystem</a>
- Elegant code style, easy to use, read and master.
- High Scalability. RT-Thread has high-quality scalable software architecture, loose coupling, modularity, is easy to tailor and expand.
- Supports high-performance applications.
- Supports all mainstream compiling tools such as GCC, Keil and IAR.
- Supports a wide range of <a href="https://www.rt-thread.io/board.html">architectures and chips</a>.
## How to run LVGL on RT-Thread?
[中文文档](https://www.rt-thread.org/document/site/#/rt-thread-version/rt-thread-standard/packages-manual/lvgl-docs/introduction)
LVGL has registered as a [software package](https://packages.rt-thread.org/en/detail.html?package=LVGL) of RT-Thread. By using [Env tool](https://www.rt-thread.io/download.html?download=Env) or [RT-Thread Studio IDE](https://www.rt-thread.io/download.html?download=Studio), RT-Thread users can easily download LVGL source code and combine with RT-Thread project. RT-Thread community has port LVGL to several BSPs:
| BSP | Note |
| --------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------- |
| [QEMU simulator](https://github.com/RT-Thread/rt-thread/tree/master/bsp/qemu-vexpress-a9/applications/lvgl) | [Infineon psoc6-evaluationkit-062S2](https://github.com/RT-Thread/rt-thread/tree/master/bsp/Infineon/psoc6-evaluationkit-062S2/applications/lvgl) |
| [Visual Studio simulator](https://github.com/RT-Thread/rt-thread/tree/master/bsp/simulator/applications/lvgl) | [Renesas ra6m3-ek](https://github.com/RT-Thread/rt-thread/tree/master/bsp/renesas/ra6m3-ek/board/lvgl) |
| [Nuvoton numaker-iot-m487](https://github.com/RT-Thread/rt-thread/tree/master/bsp/nuvoton/numaker-iot-m487/applications/lvgl) | [Renesas ra6m4-cpk](https://github.com/RT-Thread/rt-thread/tree/master/bsp/renesas/ra6m4-cpk/board/lvgl) |
| [Nuvoton numaker-pfm-m487](https://github.com/RT-Thread/rt-thread/tree/master/bsp/nuvoton/numaker-pfm-m487/applications/lvgl) | [synwit swm341](https://github.com/RT-Thread/rt-thread/tree/master/bsp/synwit/swm341/applications/lvgl) |
| [Nuvoton nk-980iot](https://github.com/RT-Thread/rt-thread/tree/master/bsp/nuvoton/nk-980iot/applications/lvgl) | [STM32H750 ART-Pi](https://github.com/RT-Thread/rt-thread/tree/master/bsp/stm32/stm32h750-artpi/applications/lvgl) |
| [Nuvoton numaker-m2354](https://github.com/RT-Thread/rt-thread/tree/master/bsp/nuvoton/numaker-m2354/applications/lvgl) | [STM32F469 Discovery](https://github.com/RT-Thread/rt-thread/tree/master/bsp/stm32/stm32f469-st-disco/applications/lvgl) |
| [Nuvoton nk-n9h30](https://github.com/RT-Thread/rt-thread/tree/master/bsp/nuvoton/nk-n9h30/applications/lvgl) | [STM32F407 explorer](https://github.com/RT-Thread/rt-thread/tree/master/bsp/stm32/stm32f407-atk-explorer/applications/lvgl) |
| [Nuvoton numaker-m032ki](https://github.com/RT-Thread/rt-thread/tree/master/bsp/nuvoton/numaker-m032ki/applications/lvgl) | [STM32L475 pandora](https://github.com/RT-Thread/rt-thread/tree/master/bsp/stm32/stm32l475-atk-pandora/applications/lvgl) |
| [Nuvoton numaker-hmi-ma35d1](https://github.com/RT-Thread/rt-thread/tree/master/bsp/nuvoton/numaker-hmi-ma35d1/applications/lvgl) | [NXP imxrt1060-evk](https://github.com/RT-Thread/rt-thread/tree/master/bsp/imxrt/imxrt1060-nxp-evk/applications/lvgl) |
| [Nuvoton numaker-iot-m467](https://github.com/RT-Thread/rt-thread/tree/master/bsp/nuvoton/numaker-iot-m467/applications/lvgl) | [Raspberry PICO](https://github.com/RT-Thread/rt-thread/tree/master/bsp/raspberry-pico/applications/lvgl) |
| [Nuvoton numaker-m467hj](https://github.com/RT-Thread/rt-thread/tree/master/bsp/nuvoton/numaker-m467hj/applications/lvgl) | |
### Tutorials
- [Introduce about RT-Thread and how to run LVGL on RT-Thread in simulators](https://www.youtube.com/watch?v=k7QYk6hSwnc)
- [How to import a BSP project with latest code into RT-Thread Studio](https://www.youtube.com/watch?v=fREPLuh-h8k)
- [How to Use LVGL with RT-Thread Studio in STM32F469 Discovery Board](https://www.youtube.com/watch?v=O_QA99BxnOE)
- [RT-Thread Youtube Channel](https://www.youtube.com/channel/UCdDHtIfSYPq4002r27ffqPw)
- [RT-Thread documentation center](https://www.rt-thread.io/document/site/)
docs/get-started/os/rt-thread.rst
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==============
RT-Thread RTOS
==============
What is RT-Thread?
------------------
`RT-Thread <https://www.rt-thread.io/>`__ is an `open
source <https://github.com/RT-Thread/rt-thread>`__, neutral, and
community-based real-time operating system (RTOS). RT-Thread has
**Standard version** and **Nano version**. For resource-constrained
microcontroller (MCU) systems, the Nano version that requires only 3 KB
Flash and 1.2 KB RAM memory resources can be tailored with easy-to-use
tools. For resource-rich IoT devices, RT-Thread can use the **online
software package** management tool, together with system configuration
tools, to achieve intuitive and rapid modular cutting, seamlessly import
rich software packages; thus, achieving complex functions like Android’s
graphical interface and touch sliding effects, smart voice interaction
effects, and so on.
Key features
~~~~~~~~~~~~
- Designed for resource-constrained devices, the minimum kernel
requires only 1.2KB of RAM and 3 KB of Flash.
- A variety of standard interfaces, such as POSIX, CMSIS, C++
application environment.
- Has rich components and a prosperous and fast growing `package ecosystem <https://packages.rt-thread.org/en/>`__
- Elegant code style, easy to use, read and master.
- High Scalability. RT-Thread has high-quality scalable software
architecture, loose coupling, modularity, is easy to tailor and
expand.
- Supports high-performance applications.
- Supports all mainstream compiling tools such as GCC, Keil and IAR.
- Supports a wide range of `architectures and chips <https://www.rt-thread.io/board.html>`__
How to run LVGL on RT-Thread?
-----------------------------
`中文文档 <https://www.rt-thread.org/document/site/#/rt-thread-version/rt-thread-standard/packages-manual/lvgl-docs/introduction>`__
LVGL has registered as a
`softwarepackage <https://packages.rt-thread.org/en/detail.html?package=LVGL>`__
of RT-Thread. By using
`Env tool <https://www.rt-thread.io/download.html?download=Env>`__ or
`RT-Thread Studio IDE <https://www.rt-thread.io/download.html?download=Studio>`__,
RT-Thread users can easily download LVGL source code and combine with
RT-Thread project.
RT-Thread community has port LVGL to several BSPs:
+--------------------------------------------------------------------------------------------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------+
| BSP | Note |
+======================================================================================================================================+======================================================================================================================================================+
| `QEMU simulator <https://github.com/RT-Thread/rt-thread/tree/master/bsp/qemu-vexpress-a9/applications/lvgl>`__ | `Infineon psoc6-evaluationkit-062S2 <https://github.com/RT-Thread/rt-thread/tree/master/bsp/Infineon/psoc6-evaluationkit-062S2/applications/lvgl>`__ |
+--------------------------------------------------------------------------------------------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------+
| `Visual Studio simulator <https://github.com/RT-Thread/rt-thread/tree/master/bsp/simulator/applications/lvgl>`__ | `Renesas ra6m3-ek <https://github.com/RT-Thread/rt-thread/tree/master/bsp/renesas/ra6m3-ek/board/lvgl>`__ |
+--------------------------------------------------------------------------------------------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------+
| `Nuvoton numaker-iot-m487 <https://github.com/RT-Thread/rt-thread/tree/master/bsp/nuvoton/numaker-iot-m487/applications/lvgl>`__ | `Renesas ra6m4-cpk <https://github.com/RT-Thread/rt-thread/tree/master/bsp/renesas/ra6m4-cpk/board/lvgl>`__ |
+--------------------------------------------------------------------------------------------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------+
| `Nuvoton numaker-pfm-m487 <https://github.com/RT-Thread/rt-thread/tree/master/bsp/nuvoton/numaker-pfm-m487/applications/lvgl>`__ | `synwit swm341 <https://github.com/RT-Thread/rt-thread/tree/master/bsp/synwit/swm341/applications/lvgl>`__ |
+--------------------------------------------------------------------------------------------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------+
| `Nuvoton nk-980iot <https://github.com/RT-Thread/rt-thread/tree/master/bsp/nuvoton/nk-980iot/applications/lvgl>`__ | `STM32H750 ART-Pi <https://github.com/RT-Thread/rt-thread/tree/master/bsp/stm32/stm32h750-artpi/applications/lvgl>`__ |
+--------------------------------------------------------------------------------------------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------+
| `Nuvoton numaker-m2354 <https://github.com/RT-Thread/rt-thread/tree/master/bsp/nuvoton/numaker-m2354/applications/lvgl>`__ | `STM32F469 Discovery <https://github.com/RT-Thread/rt-thread/tree/master/bsp/stm32/stm32f469-st-disco/applications/lvgl>`__ |
+--------------------------------------------------------------------------------------------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------+
| `Nuvoton nk-n9h30 <https://github.com/RT-Thread/rt-thread/tree/master/bsp/nuvoton/nk-n9h30/applications/lvgl>`__ | `STM32F407 explorer <https://github.com/RT-Thread/rt-thread/tree/master/bsp/stm32/stm32f407-atk-explorer/applications/lvgl>`__ |
+--------------------------------------------------------------------------------------------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------+
| `Nuvoton numaker-m032ki <https://github.com/RT-Thread/rt-thread/tree/master/bsp/nuvoton/numaker-m032ki/applications/lvgl>`__ | `STM32L475 pandora <https://github.com/RT-Thread/rt-thread/tree/master/bsp/stm32/stm32l475-atk-pandora/applications/lvgl>`__ |
+--------------------------------------------------------------------------------------------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------+
| `Nuvoton numaker-hmi-ma35d1 <https://github.com/RT-Thread/rt-thread/tree/master/bsp/nuvoton/numaker-hmi-ma35d1/applications/lvgl>`__ | `NXP imxrt1060-evk <https://github.com/RT-Thread/rt-thread/tree/master/bsp/imxrt/imxrt1060-nxp-evk/applications/lvgl>`__ |
+--------------------------------------------------------------------------------------------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------+
| `Nuvoton numaker-iot-m467 <https://github.com/RT-Thread/rt-thread/tree/master/bsp/nuvoton/numaker-iot-m467/applications/lvgl>`__ | `Raspberry PICO <https://github.com/RT-Thread/rt-thread/tree/master/bsp/raspberry-pico/applications/lvgl>`__ |
+--------------------------------------------------------------------------------------------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------+
| `Nuvoton numaker-m467hj <https://github.com/RT-Thread/rt-thread/tree/master/bsp/nuvoton/numaker-m467hj/applications/lvgl>`__ |
+--------------------------------------------------------------------------------------------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------+
Tutorials
~~~~~~~~~
- `Introduce about RT-Thread and how to run LVGL on RT-Thread in simulators <https://www.youtube.com/watch?v=k7QYk6hSwnc>`__
- `How to import a BSP project with latest code into RT-Thread Studio <https://www.youtube.com/watch?v=fREPLuh-h8k>`__
- `How to Use LVGL with RT-Thread Studio in STM32F469 Discovery Board <https://www.youtube.com/watch?v=O_QA99BxnOE>`__
- `RT-Thread Youtube Channel <https://www.youtube.com/channel/UCdDHtIfSYPq4002r27ffqPw>`__
- `RT-Thread documentation center <https://www.rt-thread.io/document/site/>`__
docs/get-started/os/zephyr.md
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# Zephyr
TODO
docs/get-started/os/zephyr.rst
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======
Zephyr
======
TODO
docs/get-started/platforms/arduino.rst
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=======
Arduino
=======
The `LVGL library <https://github.com/lvgl/lvgl>`__ is directly available as Arduino libraries.
Note that you need to choose a board powerful enough to run LVGL and
your GUI. See the `requirements of LVGL <https://docs.lvgl.io/master/intro/index.html#requirements>`__.
For example ESP32 is a good candidate to create UI's with LVGL.
Get the LVGL Arduino library
----------------------------
LVGL can be installed via the Arduino IDE Library Manager or as a .ZIP library.
You can `Download <https://github.com/lvgl/lvgl/archive/refs/heads/master.zip>`__
the latest version of LVGL from GitHub and simply copy it to Arduino's
library folder.
Set up drivers
--------------
To get started it's recommended to use `TFT_eSPI <https://github.com/Bodmer/TFT_eSPI>`__ library as a TFT
driver to simplify testing. To make it work, setup ``TFT_eSPI``
according to your TFT display type via editing either:
- ``User_Setup.h``
- or by selecting a configuration in the ``User_Setup_Select.h``
Both files are located in ``TFT_eSPI`` library's folder.
Configure LVGL
--------------
LVGL has its own configuration file called ``lv_conf.h``. When LVGL is
installed, follow these configuration steps:
1. Go to the directory of the installed Arduino libraries
2. Go to ``lvgl`` and copy ``lv_conf_template.h`` as ``lv_conf.h`` into the Arduino Libraries directory next to the ``lvgl`` library folder.
3. Open ``lv_conf.h`` and change the first ``#if 0`` to ``#if 1`` to enable the content of the file
4. Set the color depth of you display in :c:macro:`LV_COLOR_DEPTH`
5. Set :c:macro:`LV_TICK_CUSTOM`
Finally the layout with ``lv_conf.h`` should look like this:
::
arduino
|-libraries
|-lvgl
|-other_lib_1
|-other_lib_2
|-lv_conf.h
Initialize and run LVGL
-----------------------
Take a look at `LVGL_Arduino.ino <https://github.com/lvgl/lvgl/blob/master/examples/arduino/LVGL_Arduino/LVGL_Arduino.ino>`__
to see how to initialize LVGL. ``TFT_eSPI`` is used as the display driver.
In the INO file you can see how to register a display and a touchpad for
LVGL and call an example.
Use the examples and demos
--------------------------
Note that, there is no dedicated INO file for every example. Instead,
you can load an example by calling an ``lv_example_...`` function. For
example :cpp:func:`lv_example_btn_1`.
:important: Due to some the limitations of Arduino's build system you
need to copy ``lvgl/examples`` to ``lvgl/src/examples``. Similarly for
the demos ``lvgl/demos`` to ``lvgl/src/demos``.
Debugging and logging
---------------------
LVGL can display debug information in case of trouble. In the
``LVGL_Arduino.ino`` example there is a ``my_print`` method, which sends
this debug information to the serial interface. To enable this feature
you have to edit the ``lv_conf.h`` file and enable logging in the
section ``log settings``:
.. code:: c
/*Log settings*/
#define USE_LV_LOG 1 /*Enable/disable the log module*/
#if LV_USE_LOG
/* How important log should be added:
* LV_LOG_LEVEL_TRACE A lot of logs to give detailed information
* LV_LOG_LEVEL_INFO Log important events
* LV_LOG_LEVEL_WARN Log if something unwanted happened but didn't cause a problem
* LV_LOG_LEVEL_ERROR Only critical issue, when the system may fail
* LV_LOG_LEVEL_NONE Do not log anything
*/
# define LV_LOG_LEVEL LV_LOG_LEVEL_WARN
After enabling the log module and setting :c:macro:`LV_LOG_LEVEL` accordingly, the
output log is sent to the ``Serial`` port @ 115200 bps.
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# CMake
LVGL supports integrating with [CMake](https://cmake.org/). It comes with preconfigured targets for:
- [Espressif (ESP32)](https://docs.espressif.com/projects/esp-idf/en/v3.3/get-started-cmake/index.html)
- [MicroPython](https://docs.micropython.org/en/v1.15/develop/cmodules.html)
- [Zephyr](https://docs.zephyrproject.org/latest/guides/zephyr_cmake_package.html)
On top of the preconfigured targets you can also use "plain" CMake to integrate LVGL into any custom C/C++ project.
## Prerequisites
- CMake ( >= 3.12.4 )
- Compatible build tool e.g.
- [Make](https://www.gnu.org/software/make/)
- [Ninja](https://ninja-build.org/)
## Building LVGL with CMake
There are many ways to include external CMake projects into your own. A modern one also used in this example is the CMake [FetchContent](https://cmake.org/cmake/help/latest/module/FetchContent.html) module. This module conveniently allows us to download dependencies directly at configure time from e.g. [GitHub](https://github.com/). Here is an example how we might include LVGL into our own project.
```cmake
cmake_minimum_required(VERSION 3.14)
include(FetchContent)
project(MyProject LANGUAGES C CXX)
# Build an executable called "MyFirmware"
add_executable(MyFirmware src/main.c)
# Specify path to own LVGL config header
set(LV_CONF_PATH
${CMAKE_CURRENT_SOURCE_DIR}/src/lv_conf.h
CACHE STRING "" FORCE)
# Fetch LVGL from GitHub
FetchContent_Declare(lvgl GIT_REPOSITORY https://github.com/lvgl/lvgl.git)
FetchContent_MakeAvailable(lvgl)
# The target "MyFirmware" depends on LVGL
target_link_libraries(MyFirmware PRIVATE lvgl::lvgl)
```
This configuration declares a dependency between the two targets **MyFirmware** and **lvgl**. Upon building the target **MyFirmware** this dependency will be resolved and **lvgl** will be built and linked with it. Since LVGL requires a config header called [lv_conf.h](https://github.com/lvgl/lvgl/blob/master/lv_conf_template.h) to be includable by its sources we also set the option `LV_CONF_PATH` to point to our own copy of it.
### Additional CMake options
Besides `LV_CONF_PATH` there are few additional CMake options available.
#### Include paths options
- `LV_LVGL_H_INCLUDE_SIMPLE`: which specifies whether to `#include "lvgl.h"` absolut or relative
| ON (default) | OFF |
|--------------|----------------|
| "lvgl.h" | "../../lvgl.h" |
- `LV_CONF_INCLUDE_SIMPLE`: which specifies whether to `#include "lv_conf.h"` and `"lv_drv_conf.h"` absolut or relative
| ON (default) | OFF |
|-----------------|-----------------------|
| "lv_conf.h" | "../../lv_conf.h" |
| "lv_drv_conf.h" | "../../lv_drv_conf.h" |
> We do not recommend disabling those options unless your folder layout makes it absolutely necessary.
#### Examples/demos options
LVGL [examples](https://docs.lvgl.io/master/examples.html) and [demos](https://github.com/lvgl/lvgl/demos) are built by default in the main CMake file.
To disable their built, use:
- `LV_CONF_BUILD_DISABLE_EXAMPLES`: Set to `1` to disable _examples_ build
- `LV_CONF_BUILD_DISABLE_DEMOS`: Set to `1` to disable _demos_ build
## Building LVGL drivers
To build [LVGL drivers](https://github.com/lvgl/lv_drivers), you can use:
```cmake
FetchContent_Declare(lv_drivers
GIT_REPOSITORY https://github.com/lvgl/lv_drivers)
FetchContent_MakeAvailable(lv_drivers)
# The target "MyFirmware" depends on LVGL and drivers
target_link_libraries(MyFirmware PRIVATE lvgl::lvgl lvgl::drivers)
```
# Build shared libraries with CMake
By default, LVGL will be built as a static library (archive). CMake can instead be instructed to build LVGL as shared library (.so/.dll/etc.):
```cmake
set(BUILD_SHARED_LIBS ON)
```
OR
```
$ cmake "-DBUILD_SHARED_LIBS=ON" .
```
docs/get-started/platforms/cmake.rst
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=====
CMake
=====
LVGL supports integrating with `CMake <https://cmake.org/>`__. It comes
with preconfigured targets for:
- `Espressif (ESP32) <https://docs.espressif.com/projects/esp-idf/en/v3.3/get-started-cmake/index.html>`__
- `MicroPython <https://docs.micropython.org/en/v1.15/develop/cmodules.html>`__
- `Zephyr <https://docs.zephyrproject.org/latest/guides/zephyr_cmake_package.html>`__
On top of the preconfigured targets you can also use “plain” CMake to
integrate LVGL into any custom C/C++ project.
Prerequisites
*************
* CMake ( >= 3.12.4 )
* Compatible build tool e.g.
* `Make <https://www.gnu.org/software/make/>`__
* `Ninja <https://ninja-build.org/>`__
Building LVGL with CMake
************************
There are many ways to include external CMake projects into your own. A
modern one also used in this example is the CMake `FetchContent <https://cmake.org/cmake/help/latest/module/FetchContent.html>`__
module. This module conveniently allows us to download dependencies
directly at configure time from e.g. `GitHub <https://github.com/>`__.
Here is an example how we might include LVGL into our own project.
.. code:: cmake
cmake_minimum_required(VERSION 3.14)
include(FetchContent)
project(MyProject LANGUAGES C CXX)
# Build an executable called "MyFirmware"
add_executable(MyFirmware src/main.c)
# Specify path to own LVGL config header
set(LV_CONF_PATH
${CMAKE_CURRENT_SOURCE_DIR}/src/lv_conf.h
CACHE STRING "" FORCE)
# Fetch LVGL from GitHub
FetchContent_Declare(lvgl GIT_REPOSITORY https://github.com/lvgl/lvgl.git)
FetchContent_MakeAvailable(lvgl)
# The target "MyFirmware" depends on LVGL
target_link_libraries(MyFirmware PRIVATE lvgl::lvgl)
This configuration declares a dependency between the two targets
**MyFirmware** and **lvgl**. Upon building the target **MyFirmware**
this dependency will be resolved and **lvgl** will be built and linked
with it. Since LVGL requires a config header called `lv_conf.h <https://github.com/lvgl/lvgl/blob/master/lv_conf_template.h>`__
to be includable by its sources we also set the option :c:macro:`LV_CONF_PATH`
to point to our own copy of it.
Additional CMake options
========================
Besides :c:macro:`LV_CONF_PATH` there are few additional CMake options available.
Include paths options
---------------------
- :c:macro:`LV_LVGL_H_INCLUDE_SIMPLE`: which specifies whether to ``#include "lvgl.h"`` absolut or relative
============ ==============
ON (default) OFF
============ ==============
“lvgl.h” “../../lvgl.h”
============ ==============
- :c:macro:`LV_CONF_INCLUDE_SIMPLE`: which specifies whether to ``#include "lv_conf.h"`` and ``"lv_drv_conf.h"`` absolut or relative
=============== =====================
ON (default) OFF
=============== =====================
“lv_conf.h” “../../lv_conf.h”
“lv_drv_conf.h” “../../lv_drv_conf.h”
=============== =====================
..
We do not recommend disabling those options unless your folder layout
makes it absolutely necessary.
Examples/demos options
----------------------
| LVGL `examples <https://docs.lvgl.io/master/examples.html>`__ and
`demos <https://github.com/lvgl/lvgl/demos>`__ are built by default in
the main CMake file.
| To disable their built, use:
- :c:macro:`LV_CONF_BUILD_DISABLE_EXAMPLES`: Set to ``1`` to disable *examples* build
- :c:macro:`LV_CONF_BUILD_DISABLE_DEMOS`: Set to ``1`` to disable *demos* build
Building LVGL drivers
*********************
To build `LVGL drivers <https://github.com/lvgl/lv_drivers>`__, you can use:
.. code:: cmake
FetchContent_Declare(lv_drivers
GIT_REPOSITORY https://github.com/lvgl/lv_drivers)
FetchContent_MakeAvailable(lv_drivers)
# The target "MyFirmware" depends on LVGL and drivers
target_link_libraries(MyFirmware PRIVATE lvgl::lvgl lvgl::drivers)
Build shared libraries with CMake
*********************************
By default, LVGL will be built as a static library (archive). CMake can
instead be instructed to build LVGL as shared library (.so/.dll/etc.):
.. code:: cmake
set(BUILD_SHARED_LIBS ON)
OR
.. code:: console
$ cmake "-DBUILD_SHARED_LIBS=ON" .
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# Espressif (ESP32 chip series)
LVGL can be used and configured as a standard [ESP-IDF](https://github.com/espressif/esp-idf) component.
More information about ESP-IDF build system can be found [here](https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-guides/build-system.html).
## LVGL demo project for ESP32
We've created [lv_port_esp32](https://github.com/lvgl/lv_port_esp32), a project using ESP-IDF and LVGL to show one of the demos from [demos](https://github.com/lvgl/lvgl/demos).
You can configure the project to use one of the many supported display controllers and targets (chips).
See [lvgl_esp32_drivers](https://github.com/lvgl/lvgl_esp32_drivers) repository for a complete list
of supported display and indev (touch) controllers and targets.
## Using LVGL in your ESP-IDF project
### Prerequisites
* ESP-IDF v4.1 and above
* ESP evaluation board with a display
### Obtaining LVGL
__Option 1:__ git submodule
Simply clone LVGL into your `project_root/components` directory and it will be automatically integrated into the project.
If the project is a git repository you can include LVGL as a git submodule:
```sh
git submodule add https://github.com/lvgl/lvgl.git components/lvgl
```
The above command will clone LVGL's main repository into the `components/lvgl` directory. LVGL includes a `CMakeLists.txt` file that sets some configuration options so you can use LVGL right away.
__Option 2:__ IDF Component Manager
LVGL is also distributed through [IDF Component Manager](https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-guides/tools/idf-component-manager.html).
It allows users to seamlessly integrate [LVGL component](https://components.espressif.com/component/lvgl/lvgl) into their project with following command:
```sh
idf.py add-dependency lvgl/lvgl>=8.*
```
During next project build, LVGL component will be fetched from the component registry and added to project build.
### Configuration
When you are ready to configure LVGL, launch the configuration menu with `idf.py menuconfig` in your project root directory, go to `Component config` and then `LVGL configuration`.
## Using lvgl_esp32_drivers in ESP-IDF project
You can also add `lvgl_esp32_drivers` as a "component". This component should be located inside a directory named "components" in your project root directory.
When your project is a git repository you can include `lvgl_esp32_drivers` as a git submodule:
```sh
git submodule add https://github.com/lvgl/lvgl_esp32_drivers.git components/lvgl_esp32_drivers
```
docs/get-started/platforms/espressif.rst
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=============================
Espressif (ESP32 chip series)
=============================
LVGL can be used and configured as a standard `ESP-IDF <https://github.com/espressif/esp-idf>`__ component.
More information about ESP-IDF build system can be found `here <https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-guides/build-system.html>`__.
LVGL demo project for ESP32
---------------------------
We’ve created `lv_port_esp32 <https://github.com/lvgl/lv_port_esp32>`__,
a project using ESP-IDF and LVGL to show one of the demos from
`demos <https://github.com/lvgl/lvgl/demos>`__. You can configure the
project to use one of the many supported display controllers and targets
(chips).
See `lvgl_esp32_drivers <https://github.com/lvgl/lvgl_esp32_drivers>`__
repository for a complete list of supported display and indev (touch)
controllers and targets.
Using LVGL in your ESP-IDF project
----------------------------------
Prerequisites
~~~~~~~~~~~~~
- ESP-IDF v4.1 and above
- ESP evaluation board with a display
Obtaining LVGL
~~~~~~~~~~~~~~
**Option 1:** git submodule
Simply clone LVGL into your ``project_root/components`` directory and it
will be automatically integrated into the project. If the project is a
git repository you can include LVGL as a git submodule:
.. code:: sh
git submodule add https://github.com/lvgl/lvgl.git components/lvgl
The above command will clone LVGL’s main repository into the
``components/lvgl`` directory. LVGL includes a ``CMakeLists.txt`` file
that sets some configuration options so you can use LVGL right away.
**Option 2:** IDF Component Manager
LVGL is also distributed through `IDF Component Manager <https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-guides/tools/idf-component-manager.html>`__.
It allows users to seamlessly integrate `LVGL component <https://components.espressif.com/component/lvgl/lvgl>`__ into
their project with following command:
.. code:: sh
idf.py add-dependency lvgl/lvgl>=8.*
During next project build, LVGL component will be fetched from the
component registry and added to project build.
Configuration
~~~~~~~~~~~~~
When you are ready to configure LVGL, launch the configuration menu with
``idf.py menuconfig`` in your project root directory, go to
``Component config`` and then ``LVGL configuration``.
Using lvgl_esp32_drivers in ESP-IDF project
-------------------------------------------
You can also add ``lvgl_esp32_drivers`` as a “component”. This component
should be located inside a directory named “components” in your project
root directory.
When your project is a git repository you can include
``lvgl_esp32_drivers`` as a git submodule:
.. code:: sh
git submodule add https://github.com/lvgl/lvgl_esp32_drivers.git components/lvgl_esp32_drivers

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