请教menu控件怎么个用法，现在不能弹出菜单

发布于 2015-03-21 00:05:07 浏览：1836 订阅该版

现在正在研究rtgui，自己仿照rtgui提供的例子写了几个测试小程序，但是按下按钮后，单步调试程序执行了rtgui_menu_pop(menu, 100, 50);但是menu控件显示不出来，代码如下：
```#include <rtthread.h>
#include <rtgui/rtgui.h>
#include <rtgui/widgets/container.h>
#include <rtgui/widgets/window.h>
#include <rtgui/widgets/button.h>
#include <rtgui/widgets/plot.h>
#include <rtgui/widgets/plot_curve.h>
#include <rtgui/rtgui_app.h>
#include <rtgui/widgets/menu.h>
#include <rtgui/widgets/listctrl.h>

static struct rtgui_app *app3;
static struct rtgui_win *app3win;
static rtgui_menu_t *menu;
static rtgui_menu_t *submenu;

static rt_bool_t _onmenuitem(struct rtgui_object *object, struct rtgui_event *event)
{
    rt_kprintf("menu action!!
");
    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 rt_bool_t menu_handle_key(struct rtgui_object *object, struct rtgui_event *event)
{
    rtgui_rect_t rect;
    struct rtgui_event_kbd *ekbd = (struct rtgui_event_kbd *)event;

if (ekbd->type == RTGUI_KEYUP)
    {
        if (ekbd->key == RTGUIK_UP)
        { 
            if (menu != RT_NULL)
            {
                rtgui_menu_pop(menu, 100, 50);
            }
        }
        else if (ekbd->key == RTGUIK_DOWN)
        { 
			return RT_TRUE;
        }
        else if(ekbd->key == RTGUIK_LEFT)
        {
        }
        else if(ekbd->key == RTGUIK_RIGHT)
        {
        }
    }
    return RT_TRUE;
}

void create_app3_win()
{
    rtgui_rect_t rect = {0, 30, 480, 320};
    int i = 0;

{
        app3win = rtgui_win_create(NULL, "app3win", &rect, RTGUI_WIN_STYLE_NO_TITLE|RTGUI_WIN_STYLE_DESTROY_ON_CLOSE); 
        RTGUI_WIDGET_BACKGROUND(app3win) = RTGUI_RGB(200, 0, 100);
    }
    
    menu = rtgui_menu_create("Menu Test", NULL, items, sizeof(items) / sizeof(items[0]));
    rtgui_container_add_child(RTGUI_CONTAINER(app3win), RTGUI_WIDGET(menu));
	
	
	//submenu = rtgui_menu_create("sub", menu, sub_items, sizeof(sub_items) / sizeof(sub_items[0]));
	
	rtgui_win_show(app3win, RT_FALSE);
	
	rtgui_win_set_onkey(app3win, menu_handle_key);
}

static void app3_entry(void *parameter)
{
    app3 = rtgui_app_create("app3");
    if (app3 == RT_NULL) return;
	
    create_app3_win();
	
    rtgui_app_run(app3);
    
    rtgui_app_destroy(app3);
}

void App3_init()
{
	rt_thread_t app3_thread;
	
	app3_thread = rt_thread_create("app3",
                               app3_entry, RT_NULL,
                               2048 * 2, 25, 10);
		
	if (app3_thread != RT_NULL)
	{
		rt_thread_startup(app3_thread);
	}  
}```
我试了试rtgui中自带的代码好像也有问题，一点按钮准备弹出菜单就挂了。
下载附件 [rtgui-test.rar](https://oss-club.rt-thread.org/uploads/2816_c8471773c0d52a6fa5c61cd272a6d566.rar)

![P50323-003404.jpg](https://oss-club.rt-thread.org/uploads/2816_8fb593c4570455e08c806622f6aa6a67.jpg)