LVGL实现按钮互斥效果
效果
实现代码
在你的代码中调用 lv_100ask_example_btn 函数：
static void btn_event_handler(lv_event_t * e)
{
lv_event_code_t code = lv_event_get_code(e);
lv_obj_t * another_btn = (lv_obj_t *)lv_event_get_user_data(e);
lv_obj_t * btn = lv_event_get_target(e);
lv_obj_t * label = lv_obj_get_child(btn, 0);
char * label_text = lv_label_get_text(label);
if(code == LV_EVENT_CLICKED) {
if((strcmp(label_text, "START") == 0)&&\
(lv_obj_has_state(another_btn, LV_STATE_DISABLED))) {
lv_obj_add_state(btn, LV_STATE_DISABLED);
lv_obj_clear_state(another_btn, LV_STATE_DISABLED);
}
else if((strcmp(label_text, "STOP") == 0) &&\
(lv_obj_has_state(another_btn, LV_STATE_DISABLED))) {
lv_obj_clear_state(another_btn, LV_STATE_DISABLED);
lv_obj_add_state(btn, LV_STATE_DISABLED);
}
}
}
static void lv_100ask_example_btn(void)
{
lv_obj_t * label;
lv_obj_t * btn1 = lv_btn_create(lv_scr_act());
lv_obj_align(btn1, LV_ALIGN_CENTER, 0, -40);
label = lv_label_create(btn1);
lv_label_set_text(label, "START");
lv_obj_center(label);
lv_obj_t * btn2 = lv_btn_create(lv_scr_act());
lv_obj_add_state(btn2, LV_STATE_DISABLED);
lv_obj_align(btn2, LV_ALIGN_CENTER, 0, 40);
label = lv_label_create(btn2);
lv_label_set_text(label, "STOP");
lv_obj_center(label);
lv_obj_add_event_cb(btn1, btn_event_handler, LV_EVENT_ALL, btn2);
lv_obj_add_event_cb(btn2, btn_event_handler, LV_EVENT_ALL, btn1);
}