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feat(chart): add stacked chart support (#8573)

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Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: liamHowatt <liamjmh0@gmail.com>
This commit is contained in:
Gabor Kiss-Vamosi
2025-08-15 23:20:37 +02:00
committed by GitHub
parent 709461813b
commit e6864400a2
6 changed files with 259 additions and 74 deletions
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docs/src/details/widgets/chart.rst
+7 -5
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@@ -38,7 +38,7 @@ Each chart has the following attributes (over and above attributes found in
Type (governs how a chart's data series are drawn)
- Can be LINE (default), BAR, SCATTER, or none.
- Can be LINE (default), BAR, STACKED, SCATTER, or NONE.
- You can change the chart's type at any point during its life.
Horizontal and Vertical division lines
@@ -60,8 +60,8 @@ 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- and BAR-charts, this is the number of points on the X axis.
- LINE- and BAR-charts require only one data-value array to supply Y-values for each data point.
- 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 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.
@@ -121,7 +121,7 @@ Parts and Styles
- :cpp:enumerator:`LV_PART_MAIN` The background of the chart. Uses the :ref:`typical
background <typical bg props>` and line style properties (for division lines).
*Padding* makes the series area smaller. For BAR charts ``pad_column`` sets the
*Padding* makes the series area smaller. For BAR and STACKED charts ``pad_column`` sets the
space between bars in the same data series.
- :cpp:enumerator:`LV_PART_SCROLLBAR` A scrollbar used if the chart is zoomed. See
:ref:`base_widget`'s documentation for details.
@@ -157,7 +157,9 @@ 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_BAR`: Draw bars.
- :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.
- :cpp:enumerator:`LV_CHART_TYPE_SCATTER`: X/Y chart drawing point's and optionally
lines between the points if line-width style values for
:cpp:enumerator:`LV_PART_ITEMS` is a non-zero value, and the point's Y-value is