1 #include "../lv_examples.h"
2 #if LV_BUILD_EXAMPLES && LV_USE_FLEX
3
event_cb(lv_event_t * e)4 static void event_cb(lv_event_t * e)
5 {
6 /*The original target of the event. Can be the buttons or the container*/
7 lv_obj_t * target = lv_event_get_target(e);
8
9 /*The current target is always the container as the event is added to it*/
10 lv_obj_t * cont = lv_event_get_current_target(e);
11
12 /*If container was clicked do nothing*/
13 if(target == cont) return;
14
15 /*Make the clicked buttons red*/
16 lv_obj_set_style_bg_color(target, lv_palette_main(LV_PALETTE_RED), 0);
17 }
18
19 /**
20 * Demonstrate event bubbling
21 */
lv_example_event_3(void)22 void lv_example_event_3(void)
23 {
24
25 lv_obj_t * cont = lv_obj_create(lv_scr_act());
26 lv_obj_set_size(cont, 290, 200);
27 lv_obj_center(cont);
28 lv_obj_set_flex_flow(cont, LV_FLEX_FLOW_ROW_WRAP);
29
30 uint32_t i;
31 for(i = 0; i < 30; i++) {
32 lv_obj_t * btn = lv_btn_create(cont);
33 lv_obj_set_size(btn, 80, 50);
34 lv_obj_add_flag(btn, LV_OBJ_FLAG_EVENT_BUBBLE);
35
36 lv_obj_t * label = lv_label_create(btn);
37 lv_label_set_text_fmt(label, "%"LV_PRIu32, i);
38 lv_obj_center(label);
39 }
40
41 lv_obj_add_event_cb(cont, event_cb, LV_EVENT_CLICKED, NULL);
42 }
43
44 #endif
45
