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feat(chart): add curved type (#9564)

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Co-authored-by: André <andre_miguel_costa@hotmail.com>
Co-authored-by: cubic-dev-ai[bot] <191113872+cubic-dev-ai[bot]@users.noreply.github.com>
This commit is contained in:
Gabor Kiss-Vamosi
2026-02-07 08:11:30 +01:00
committed by GitHub
parent c7a959757c
commit ade26a471b
12 changed files with 270 additions and 28 deletions
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docs/src/main-modules/draw/draw_descriptors.rst
+1 -1
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@@ -582,7 +582,7 @@ these fields:
:round_end: Rounds the line end.
:raw_end: Set to 1 to skip end calculations if they are unnecessary.
+If a large amount of points needs to be rendered it's recommended to use ``points``
If a large amount of points needs to be rendered it's recommended to use ``points``
instead of ``p1`` and ``p2`` as it avoids creating many draw tasks.
Functions for line drawing:
docs/src/widgets/chart.rst
+7 -2
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@@ -60,11 +60,12 @@ Point count (number of data points in all data series added to the chart)
- default 10
- If you provide your own data-value arrays, each array so provided must contain
at least this number of values.
- For LINE-, BAR-, STACKED-charts, this is the number of points on the X axis.
- LINE-, BAR-, STACKED-charts require only one data-value array to supply Y-values for each data point.
- For LINE-, CURVE-, BAR-, STACKED-charts, this is the number of points on the X axis.
- LINE-, CURVE-, BAR-, STACKED-charts require only one data-value array to supply Y-values for each data point.
- For SCATTER charts, this is the number of scatter-points in the data series.
- SCATTER charts have separate data-value arrays for both X-values and Y-values.
Any number of data series
- After a chart is created, it initially contains no data series. You have to add them.
@@ -157,6 +158,10 @@ A chart can be one of the following types:
can also be illustrated if their ``width``, ``height``, ``bg_color`` and ``radius``
styles (for :cpp:enumerator:`LV_PART_ITEMS`) are set and both ``width`` and
``height`` have non-zero values.
- :cpp:enumerator:`LV_CHART_TYPE_CURVE`: Similar to the LINE type, but it draws Bezier curves
between data points. ``LV_USE_VECTOR_GRAPHICS`` and a draw unit (e.g. VGLite, or ThorVG for
software rendering) need to be enabled. It also supports the ``line_dash_gap/width`` style
properties.
- :cpp:enumerator:`LV_CHART_TYPE_BAR`: Draw individual vertical bars for each point in each series.
- :cpp:enumerator:`LV_CHART_TYPE_STACKED`: Draw vertical stacked bars where multiple data series
are displayed as segments within a single bar for each data point. Supports only positive values.