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lv_example_get_started_2.c
33 lines (28 loc) · 1.14 KB
/
lv_example_get_started_2.c
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#include "../lv_examples.h"
#if LV_BUILD_EXAMPLES && LV_USE_BUTTON
static void btn_event_cb(lv_event_t * e)
{
lv_event_code_t code = lv_event_get_code(e);
lv_obj_t * btn = lv_event_get_target(e);
if(code == LV_EVENT_CLICKED) {
static uint8_t cnt = 0;
cnt++;
/*Get the first child of the button which is the label and change its text*/
lv_obj_t * label = lv_obj_get_child(btn, 0);
lv_label_set_text_fmt(label, "Button: %d", cnt);
}
}
/**
* Create a button with a label and react on click event.
*/
void lv_example_get_started_2(void)
{
lv_obj_t * btn = lv_button_create(lv_screen_active()); /*Add a button the current screen*/
lv_obj_set_pos(btn, 10, 10); /*Set its position*/
lv_obj_set_size(btn, 120, 50); /*Set its size*/
lv_obj_add_event_cb(btn, btn_event_cb, LV_EVENT_ALL, NULL); /*Assign a callback to the button*/
lv_obj_t * label = lv_label_create(btn); /*Add a label to the button*/
lv_label_set_text(label, "Button"); /*Set the labels text*/
lv_obj_center(label);
}
#endif