#include "../../lv_examples.h" #if LV_USE_MENU && LV_USE_MSGBOX && LV_BUILD_EXAMPLES static void back_event_handler(lv_event_t * e) { lv_obj_t * obj = lv_event_get_target(e); lv_obj_t * menu = lv_event_get_user_data(e); if(lv_menu_back_btn_is_root(menu, obj)) { lv_obj_t * mbox1 = lv_msgbox_create(NULL, "Hello", "Root back btn click.", NULL, true); lv_obj_center(mbox1); } } void lv_example_menu_2(void) { lv_obj_t * menu = lv_menu_create(lv_scr_act()); lv_menu_set_mode_root_back_btn(menu, LV_MENU_ROOT_BACK_BTN_ENABLED); lv_obj_add_event_cb(menu, back_event_handler, LV_EVENT_CLICKED, menu); lv_obj_set_size(menu, lv_disp_get_hor_res(NULL), lv_disp_get_ver_res(NULL)); lv_obj_center(menu); lv_obj_t * cont; lv_obj_t * label; /*Create a sub page*/ lv_obj_t * sub_page = lv_menu_page_create(menu, NULL); cont = lv_menu_cont_create(sub_page); label = lv_label_create(cont); lv_label_set_text(label, "Hello, I am hiding here"); /*Create a main page*/ lv_obj_t * main_page = lv_menu_page_create(menu, NULL); cont = lv_menu_cont_create(main_page); label = lv_label_create(cont); lv_label_set_text(label, "Item 1"); cont = lv_menu_cont_create(main_page); label = lv_label_create(cont); lv_label_set_text(label, "Item 2"); cont = lv_menu_cont_create(main_page); label = lv_label_create(cont); lv_label_set_text(label, "Item 3 (Click me!)"); lv_menu_set_load_page_event(menu, cont, sub_page); lv_menu_set_page(menu, main_page); } #endif