rt-thread-official/examples/gui/demo_view_menu.c

/*
 * 程序清单：menu控件演示
 *
 * 这个例子会在创建出的view上添加几个不同类型的label控件
 */
#include "demo_view.h"
#include <rtgui/widgets/menu.h>
#include <rtgui/widgets/button.h>

static rt_bool_t _onmenuitem(struct rtgui_widget *widget, struct rtgui_event* event)
{
	rt_kprintf("menu action!!\n");
	return RT_TRUE;
}

static const rtgui_menu_item_t sub_items[] = 
{
	{RTGUI_ITEM_NORMAL, "item #1", RT_NULL, RT_NULL, 0, _onmenuitem},
	{RTGUI_ITEM_NORMAL, "item #2", RT_NULL, RT_NULL, 0, RT_NULL},
	{RTGUI_ITEM_SEPARATOR, RT_NULL, RT_NULL, RT_NULL, 0, RT_NULL},
	{RTGUI_ITEM_NORMAL, "item #3", RT_NULL, RT_NULL, 0, RT_NULL},
};
static const rtgui_menu_item_t items[] = 
{
	{RTGUI_ITEM_NORMAL, "item #1", RT_NULL, RT_NULL, 0, RT_NULL},
	{RTGUI_ITEM_NORMAL, "item #2", RT_NULL, RT_NULL, 0, RT_NULL},
	{RTGUI_ITEM_SEPARATOR, RT_NULL, RT_NULL, RT_NULL, 0, RT_NULL},
	{RTGUI_ITEM_SUBMENU, "item #3", RT_NULL, (struct rtgui_menu_item_t *)sub_items, sizeof(sub_items)/sizeof(sub_items[0]), RT_NULL},
};
static rtgui_menu_t* menu;

static _onmenu(struct rtgui_widget* widget, struct rtgui_event* event)
{
	rtgui_rect_t rect;

	rtgui_widget_get_rect(widget, &rect);
	rtgui_widget_rect_to_device(widget, &rect);

	if (menu != RT_NULL)
		rtgui_menu_pop(menu, rect.x1, rect.y2 + 5);
}

/* 创建用于演示menu控件的视图 */
rtgui_view_t* demo_view_menu(rtgui_workbench_t* workbench)
{
	rtgui_rect_t rect;
	rtgui_view_t* view;
	rtgui_button_t* button;

	/* 先创建一个演示用的视图 */
	view = demo_view(workbench, "MENU View");

	/* 获得视图的位置信息 */
	demo_view_get_rect(view, &rect);
	rect.x1 += 5;
	rect.x2 = rect.x1 + 100;
	rect.y1 += 5;
	rect.y2 = rect.y1 + 20;
	/* 创建一个button控件 */
	button = rtgui_button_create("Pop Menu");
	/* 设置button的位置 */
	rtgui_widget_set_rect(RTGUI_WIDGET(button), &rect);
	/* view是一个container控件，调用add_child方法添加这个button控件 */
	rtgui_container_add_child(RTGUI_CONTAINER(view), RTGUI_WIDGET(button));
	rtgui_button_set_onbutton(button, _onmenu);

	menu = rtgui_menu_create("Menu Test", RT_NULL, items, sizeof(items)/sizeof(items[0]));

	return view;
}