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feat(label): added animation style property to apply it to circular scrolling animation of label widget (#3128)

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* feat(label): added animation style property to apply it to circular scrolling animation of label widget

Added an animation style property to be used as animation template for different use cases in different widgets.
This commit implements using this property to set the start and repeat delay of the circular scrolling animation of the label widget.

Closes #3097

* fix(label): changed animation style property's var_type to `const lv_anim_t *`

* example(label): added example showing how to customize circular scrolling animation

* chore(label): ran code-format.py and added missing function prototype to lv_example_widgets.h
This commit is contained in:
Andres O. Vela
2022-02-25 11:54:27 +01:00
committed by GitHub
parent e25fa427d1
commit 340d45cfa9
13 changed files with 118 additions and 11 deletions
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docs/widgets/core/label.md
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@@ -58,6 +58,10 @@ The whole mechanism (click and select the text as you drag your finger/mouse) is
### Very long texts
LVGL can efficiently handle very long (e.g. > 40k characters) labels by saving some extra data (~12 bytes) to speed up drawing. To enable this feature, set `LV_LABEL_LONG_TXT_HINT 1` in `lv_conf.h`.
### Custom scrolling animations
Some aspects of the scrolling animations in long modes `LV_LABEL_LONG_SCROLL` and `LV_LABEL_LONG_SCROLL_CIRCULAR` can be customized by setting the animation property of a style, using `lv_style_set_anim()`.
Currently, only the start and repeat delay of the circular scrolling animation can be customized. If you need to customize another aspect of the scrolling animation, feel free to open an [issue on Github](https://github.com/lvgl/lvgl/issues) to request the feature.
### Symbols
The labels can display symbols alongside letters (or on their own). Read the [Font](/overview/font) section to learn more about the symbols.