1 #include "../lv_examples.h"
2 #if LV_BUILD_EXAMPLES && LV_USE_BTN
3
btn_event_cb(lv_event_t * e)4 static void btn_event_cb(lv_event_t * e)
5 {
6 lv_event_code_t code = lv_event_get_code(e);
7 lv_obj_t * btn = lv_event_get_target(e);
8 if(code == LV_EVENT_CLICKED) {
9 static uint8_t cnt = 0;
10 cnt++;
11
12 /*Get the first child of the button which is the label and change its text*/
13 lv_obj_t * label = lv_obj_get_child(btn, 0);
14 lv_label_set_text_fmt(label, "Button: %d", cnt);
15 }
16 }
17
18 /**
19 * Create a button with a label and react on click event.
20 */
lv_example_get_started_1(void)21 void lv_example_get_started_1(void)
22 {
23 lv_obj_t * btn = lv_btn_create(lv_scr_act()); /*Add a button the current screen*/
24 lv_obj_set_pos(btn, 10, 10); /*Set its position*/
25 lv_obj_set_size(btn, 120, 50); /*Set its size*/
26 lv_obj_add_event_cb(btn, btn_event_cb, LV_EVENT_ALL, NULL); /*Assign a callback to the button*/
27
28 lv_obj_t * label = lv_label_create(btn); /*Add a label to the button*/
29 lv_label_set_text(label, "Button"); /*Set the labels text*/
30 lv_obj_center(label);
31 }
32
33 #endif
34
35
