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Update screen object opacity function documentation (#4505)

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Xiaosheng An
2023-08-31 23:25:25 +01:00
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parent a296456591
commit 1375ea85a1
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docs/overview/display.md
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@@ -67,7 +67,7 @@ The Alpha channel of 32-bit colors will be 0 where there are no objects and 255
In summary, to enable transparent screens and displays for OSD menu-like UIs: In summary, to enable transparent screens and displays for OSD menu-like UIs:
- Enable `LV_COLOR_SCREEN_TRANSP` in `lv_conf.h` - Enable `LV_COLOR_SCREEN_TRANSP` in `lv_conf.h`
- Set the screen's opacity to `LV_OPA_TRANSP` e.g. with `lv_obj_set_style_local_bg_opa(lv_scr_act(), LV_OBJMASK_PART_MAIN, LV_STATE_DEFAULT, LV_OPA_TRANSP)` - Set the screen's opacity to `LV_OPA_TRANSP` e.g. with `lv_obj_set_style_bg_opa(lv_scr_act(), LV_OPA_TRANSP, LV_PART_MAIN)`
- Set the display opacity to `LV_OPA_TRANSP` with `lv_disp_set_bg_opa(NULL, LV_OPA_TRANSP);` - Set the display opacity to `LV_OPA_TRANSP` with `lv_disp_set_bg_opa(NULL, LV_OPA_TRANSP);`
## Features of displays ## Features of displays