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feat(event) add LV_EVENT_SCREEN_LOADED/UNLOADED events

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Gabor Kiss-Vamosi
2021-10-13 12:35:58 +02:00
parent 7124ef7761
commit ee5369e2d2
3 changed files with 10 additions and 0 deletions
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2
docs/overview/event.md
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@@ -110,6 +110,8 @@ The following event codes exist:
- `LV_EVENT_STYLE_CHANGED` Object's style has changed - `LV_EVENT_STYLE_CHANGED` Object's style has changed
- `LV_EVENT_BASE_DIR_CHANGED` The base dir has changed - `LV_EVENT_BASE_DIR_CHANGED` The base dir has changed
- `LV_EVENT_GET_SELF_SIZE` Get the internal size of a widget - `LV_EVENT_GET_SELF_SIZE` Get the internal size of a widget
- `LV_EVENT_SCREEN_LOADED` A screen was loaded
- `LV_EVENT_SCREEN_UNLOADED` A screen was unloaded
### Special events ### Special events
- `LV_EVENT_VALUE_CHANGED` The object's value has changed (i.e. slider moved) - `LV_EVENT_VALUE_CHANGED` The object's value has changed (i.e. slider moved)

5
src/core/lv_disp.c
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@@ -82,8 +82,13 @@ void lv_disp_load_scr(lv_obj_t * scr)
{ {
lv_disp_t * d = lv_obj_get_disp(scr); lv_disp_t * d = lv_obj_get_disp(scr);
if(!d) return; /*Shouldn't happen, just to be sure*/ if(!d) return; /*Shouldn't happen, just to be sure*/
if(d->act_scr) lv_event_send(d->act_scr, LV_EVENT_SCREEN_UNLOADED, NULL);
d->act_scr = scr; d->act_scr = scr;
if(d->act_scr) lv_event_send(d->act_scr, LV_EVENT_SCREEN_LOADED, NULL);
lv_obj_invalidate(scr); lv_obj_invalidate(scr);
} }

3
src/core/lv_event.h
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@@ -75,6 +75,9 @@ typedef enum {
LV_EVENT_CHILD_CHANGED, /**< Child was removed, added, or its size, position were changed */ LV_EVENT_CHILD_CHANGED, /**< Child was removed, added, or its size, position were changed */
LV_EVENT_CHILD_CREATED, /**< Child was created, always bubbles up to all parents*/ LV_EVENT_CHILD_CREATED, /**< Child was created, always bubbles up to all parents*/
LV_EVENT_CHILD_DELETED, /**< Child was deleted, always bubbles up to all parents*/ LV_EVENT_CHILD_DELETED, /**< Child was deleted, always bubbles up to all parents*/
LV_EVENT_SCREEN_LOADED, /**< A screen was loaded*/
LV_EVENT_SCREEN_UNLOADED, /**< A screen was unloaded*/
LV_EVENT_SIZE_CHANGED, /**< Object coordinates/size have changed*/ LV_EVENT_SIZE_CHANGED, /**< Object coordinates/size have changed*/
LV_EVENT_STYLE_CHANGED, /**< Object's style has changed*/ LV_EVENT_STYLE_CHANGED, /**< Object's style has changed*/
LV_EVENT_LAYOUT_CHANGED, /**< The children position has changed due to a layout recalculation*/ LV_EVENT_LAYOUT_CHANGED, /**< The children position has changed due to a layout recalculation*/