用户ookaiii在优快云社区发帖求助，在CReBar上设置CMenu遇到问题，调用CReBar::SetMenu(...)无效。正常情况下仅有CFrameWnd调用SetMenu无异常，求解为何CReBar及CButton等控件无法成功设置菜单。
* 优快云首页
* 新 闻
* 社 区
* 文 档
* Blog
* 杂 志
* .NET
* Java
* 移动
* 游戏
* 管理
* 招聘
* 培训
* 搜 索
* 代码
* 第二书店
* 博文视点
优快云社区
优快云社区 － VC/MFC / 基础类
收藏此页 | 打印 | 关闭窗口
主题关键词
* menu
* button
* 菜单
* hot-tracking
* toolbar
* key
* bar
* display
* navigation
* when
得分解答快速导航
* 帖主：ookaiii
* 111222
* jifeng
相关连接
* Visual C++/MFC FAQ
* C/C++ Blog
* Visual C++类图书
* Visual C++类源码下载
广告也精彩
反馈
请通过下述方式给我们反馈.
反馈
Valid XHTML 1.0 Strict Valid CSS!
各位：我现在想在CReBar上设置CMenu，调用CReBar::SetMenu(...)为什么会不行？正确的做法应该是怎样的？
ookaiii (IUnknown* pIWorld) 三级用户 该版得分小于等于1000分，大于500分 2001-04-30 01:29:00 在 VC/MFC / 基础类 提问
各位：我现在想在CReBar上设置CMenu，调用CReBar::SetMenu(...)为什么会不行？正确的做法应该是怎样的？另：这种情况也同样发生在CButton等上，好像只有CFrameWnd调用SetMenu才没有问题，我想问的式为什么会这样？
问题点数：20、回复次数：70
1楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 01:36:00 得分 0
强烈关注！！！！！！！！！我要是会就我也不会这个！！
Top
2楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 01:38:00 得分 0
上面输入法出毛病了，语句不通啊，就是说，我也不会这个
Top
3楼 ookaiii (IUnknown* pIWorld) 三级用户 该版得分小于等于1000分，大于500分 回复于 2001-04-30 01:53:00 得分 0
我想了好长时间也不懂，111222叫个朋友怎么样，我很瓦哦
Top
4楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 01:59:00 得分 0
我也想了好长时间，用各种MenuBar都不理想...
Top
5楼 ookaiii (IUnknown* pIWorld) 三级用户 该版得分小于等于1000分，大于500分 回复于 2001-04-30 02:08:00 得分 0
好像就我们两个人在这里唧唧歪歪，每人帮么？我很心焦
Top
6楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 02:08:00 得分 0
我试了setmenu 不好使啊
Top
7楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 02:09:00 得分 0
CReBar是从CWnd继承而来的啊，为什么setmenu不好使呢？
MSDN上没有讲解如何把菜单加进ReBar
Top
8楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 02:12:00 得分 0
你看MSDN里面CReBar的最初介绍页面，就是介绍继承关系的那个
上面的菜单好象是按钮啊
Top
9楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 02:13:00 得分 0
你还在吗？
Top
10楼 ookaiii (IUnknown* pIWorld) 三级用户 该版得分小于等于1000分，大于500分 回复于 2001-04-30 02:14:00 得分 0
调试器会吧你带到CWnd::SetMenu(..)处
是ASSERT（IsWindow(m_hWnd))处的错,可我感觉CReBar的窗口有了啊，我不明白
Top
11楼 ookaiii (IUnknown* pIWorld) 三级用户 该版得分小于等于1000分，大于500分 回复于 2001-04-30 02:15:00 得分 0
我在
Top
12楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 02:17:00 得分 0
好象只有CWnd才能塞进ReBar
Top
13楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 02:17:00 得分 0
等我传一个图片到网上你看
Top
14楼 ookaiii (IUnknown* pIWorld) 三级用户 该版得分小于等于1000分，大于500分 回复于 2001-04-30 02:18:00 得分 0
好啊
Top
15楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 02:20:00 得分 0
我先做成gif
Top
16楼 ookaiii (IUnknown* pIWorld) 三级用户 该版得分小于等于1000分，大于500分 回复于 2001-04-30 02:20:00 得分 0
你放哪？
Top
17楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 02:23:00 得分 0
http://61.129.70.31/103180161/jeffreyren/111222/rebar.jpg
你看看上面的菜单
Top
18楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 02:24:00 得分 0
上面的菜单到底是怎么弄的？
你说IE的菜单又是怎么弄的呢？
左边有一个Gripper bar(就是那个竖条，能通过它拉动REBAR）
Top
19楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 02:25:00 得分 0
有人说：“IE的菜单是一堆按钮，点上去的时候TrackPopupMenu....”
难道MS的东西也要这么费劲么？
Top
20楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 02:27:00 得分 0
还在么？你几分钟刷新一次这个页面？
Top
21楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 02:27:00 得分 0
AddBar这个函数也用不了，这个只针对CWnd啊
Menu是CObject继承而来的...
Top
22楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 02:29:00 得分 0
我刚才试了这个
CMenu m_menu;
m_menu.LoadMenu(IDR_MAINFRAME);
m_wndReBar.Create(this);
m_wndReBar.SetMenu(&m_menu);
没有效果
Top
23楼 ookaiii (IUnknown* pIWorld) 三级用户 该版得分小于等于1000分，大于500分 回复于 2001-04-30 02:30:00 得分 0
嘿嘿，从msdn上抄的吧，不过用spy+看他们都是由toolwindow(好像是，不清了)你看看
还有要想给工具跳加背景该怎么办
Top
24楼 ookaiii (IUnknown* pIWorld) 三级用户 该版得分小于等于1000分，大于500分 回复于 2001-04-30 02:31:00 得分 0
对不起，我正和朋友聊，没忙过来
Top
25楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 02:32:00 得分 0
工具条加背景很容易啊
Top
26楼 ookaiii (IUnknown* pIWorld) 三级用户 该版得分小于等于1000分，大于500分 回复于 2001-04-30 02:32:00 得分 0
CMenu m_menu;
m_menu.LoadMenu(IDR_MAINFRAME);
m_wndReBar.Create(this);
m_wndReBar.SetMenu(&m_menu);
m_menu.Detach();
我也是过的，的确没任何效果
Top
27楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 02:34:00 得分 0
m_wndReBar.AddBar(&m_wndToolBar....
BOOL AddBar( CWnd* pBar, LPCTSTR lpszText = NULL, CBitmap* pbmp = NULL, DWORD dwStyle = RBBS_GRIPPERALWAYS | RBBS_FIXEDBMP );
这个函数就可以了
Top
28楼 ookaiii (IUnknown* pIWorld) 三级用户 该版得分小于等于1000分，大于500分 回复于 2001-04-30 02:34:00 得分 0
工具条加背景很容易啊 ？说说看，我想知道的，大哥
Top
29楼 ookaiii (IUnknown* pIWorld) 三级用户 该版得分小于等于1000分，大于500分 回复于 2001-04-30 02:34:00 得分 0
谢谢，
Top
30楼 ookaiii (IUnknown* pIWorld) 三级用户 该版得分小于等于1000分，大于500分 回复于 2001-04-30 02:37:00 得分 0
这个问题其实你也可以从别的从CWnd派生的class中看到，比如一些控制CButton,CStatic
Top
31楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 02:39:00 得分 10
CBitmap bmp;
bmp.LoadBitmap(IDC_BK);
m_wndReBar.AddBar(&m_wndToolBar,NULL,&bmp,RBBS_GRIPPERALWAYS ¦ RBBS_FIXEDBMP );
这就可以啦
Top
32楼 ookaiii (IUnknown* pIWorld) 三级用户 该版得分小于等于1000分，大于500分 回复于 2001-04-30 02:40:00 得分 0
为什么会不行？另外不知你有没有用spy++看过超级结巴,它的menu就是达到了这种效果
Top
33楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 02:41:00 得分 0
怎样才能利用REBAR实现IE那样的菜单呢？唉，我想了好久好久了（4、5天了！！）
Top
34楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 02:41:00 得分 0
我没有超级结巴啊
Top
35楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 02:42:00 得分 0
等我找点东东给你看
Top
36楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 02:44:00 得分 0
回复人：gameboy999(无名) (2001-4-27 21:20:00) 得0分
好多模拟都是用toobar或你所说的ccomnadbar
用的方法都是点击按钮后弹出菜单(popup-style)
我怕麻烦,所以我也不会
Top
37楼 ookaiii (IUnknown* pIWorld) 三级用户 该版得分小于等于1000分，大于500分 回复于 2001-04-30 02:46:00 得分 0
好的，我想能从原理上给各解答才是我最期望的，大家都不要看看就走啊,给点提示吧，我可是在乞讨了，求你给点知识吧
Top
38楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 02:47:00 得分 0
哪有大家啊，就我们两个人在的
Top
39楼 ookaiii (IUnknown* pIWorld) 三级用户 该版得分小于等于1000分，大于500分 回复于 2001-04-30 02:50:00 得分 0
哎，见死不救，行侠仗义的大侠都拿去了?观者就没有同情心？哪怕说的不对也被关系，一起提高吗!
Top
40楼 ookaiii (IUnknown* pIWorld) 三级用户 该版得分小于等于1000分，大于500分 回复于 2001-04-30 02:54:00 得分 0
世风日下,世态炎凉，没人施舍我就要饿死了
Top
41楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 02:54:00 得分 0
三更半夜的，大家都在睡觉吧
Top
42楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 02:55:00 得分 0
看来只有TrackPopupMenu了，不过这种方法未免太笨了
Top
43楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 02:57:00 得分 0
你有没有什么办法让工具栏只显示文字（别说把图画成文字）
Top
44楼 ookaiii (IUnknown* pIWorld) 三级用户 该版得分小于等于1000分，大于500分 回复于 2001-04-30 02:57:00 得分 0
是的，但一定有人会的（毕竟有这样的范例），我们等等吧
Top
45楼 ookaiii (IUnknown* pIWorld) 三级用户 该版得分小于等于1000分，大于500分 回复于 2001-04-30 02:59:00 得分 0
看看msdn中有没有什么style,别的我没辙了
Top
46楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 03:03:00 得分 0
████ █ ██ █ █ ███ █ █
█ █ █ █ █ █ █ █ █ █
█ █ █ █ █ █ █ █
█ █ █ █ █ █ ██ █
█ █ █ █ █ █ █ █
█ █ █ █ █ █ █ █ █
████ ███ ██ ██ ███ ████
Top
47楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 03:05:00 得分 0
void CMainFrame::OnDropDown(NMHDR* pNotifyStruct, LRESULT* pResult)
{
// this function handles the dropdown menus from the toolbar
NMTOOLBAR* pNMToolBar = (NMTOOLBAR*)pNotifyStruct;
CRect rect;
// translate the current toolbar item rectangle into screen coordinates
// so that we'll know where to pop up the menu
m_wndToolBar.GetToolBarCtrl().GetRect(pNMToolBar->iItem, &rect);
rect.top = rect.bottom;
::ClientToScreen(pNMToolBar->hdr.hwndFrom, &rect.TopLeft());
if(pNMToolBar->iItem == ID_FONT_DROPDOWN)
{
CMenu menu;
CMenu* pPopup;
// the font popup is stored in a resource
menu.LoadMenu(IDR_FONT_POPUP);
pPopup = menu.GetSubMenu(0);
pPopup->TrackPopupMenu(TPM_LEFTALIGN | TPM_LEFTBUTTON, rect.left, rect.top + 1, AfxGetMainWnd());
}
*pResult = TBDDRET_DEFAULT;
}
Top
48楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 03:08:00 得分 0
████ █ ██ █ █ ███ █ █
█ █ █ █ █ █ █ █ █ █
█ █ █ █ █ █ █ █
█ █ █ █ █ █ ██ █
█ █ █ █ █ █ █ █
█ █ █ █ █ █ █ █ █
████ ███ ██ ██ ███ ████
Top
49楼 ookaiii (IUnknown* pIWorld) 三级用户 该版得分小于等于1000分，大于500分 回复于 2001-04-30 03:11:00 得分 0
什么14？能说说么？我不明白
Top
50楼 ookaiii (IUnknown* pIWorld) 三级用户 该版得分小于等于1000分，大于500分 回复于 2001-04-30 03:13:00 得分 0
████ █ ██ █ █ ███ █ █
█ █ █ █ █ █ █ █ █ █
█ █ █ █ █ █ █ █
█ █ █ █ █ █ ██ █
█ █ █ █ █ █ █ █
█ █ █ █ █ █ █ █ █
████ ███ ██ ██ ███ ████
也看不明白，（知道我是多么的菜了吧）
Top
51楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 03:14:00 得分 0
上面是faint++的代码，你没学过，当然看不明白
Top
52楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 03:15:00 得分 0
faint++实现这种菜单很容易的、、听说faint#要出来了
Top
53楼 ookaiii (IUnknown* pIWorld) 三级用户 该版得分小于等于1000分，大于500分 回复于 2001-04-30 03:17:00 得分 0
什么是faint++？你给的代码看来是准备TrackPopupMenu了，那可不是办法啊，
要是真没人解答我就给你分了(最多等到后天)，反正我都拿出来了，总不能收回去吧
Top
54楼 ookaiii (IUnknown* pIWorld) 三级用户 该版得分小于等于1000分，大于500分 回复于 2001-04-30 03:19:00 得分 0
哎，我很菜啊，不知道faint++，不知你学过com没有，
Top
55楼 ookaiii (IUnknown* pIWorld) 三级用户 该版得分小于等于1000分，大于500分 回复于 2001-04-30 03:23:00 得分 0
我得走了111222，很高兴和你聊，真期望明天就有解答，886
Top
56楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 03:26:00 得分 0
再见！
Top
57楼 () 一级用户 该版得分小于等于100分 回复于 2001-04-30 16:07:00 得分 0
我有例子，自己写一个menu类（继承Ctoolbar,改别人的)
Top
58楼 lolin (lolin) 一级用户 该版得分小于等于100分 回复于 2001-04-30 16:29:00 得分 0
首先声明一个CDialogBar的派生类：
定义函数BOOL Create(CWnd* pParentWnd, LPTSTR nIDTemplate, UINT nStyle, UINT nID ); //重要
class MyDia : public CDialogBar
{
// Construction
public:
BOOL Create(CWnd* pParentWnd, LPTSTR nIDTemplate, UINT nStyle, UINT nID );
MyDia(CWnd* pParent = NULL); // standard constructor
// Dialog Data
//{{AFX_DATA(MyDia)
enum { IDD = IDR_TEST_MAINFRAME };
// NOTE: the ClassWizard will add data members here
//}}AFX_DATA
// Overrides
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(MyDia)
public:
virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support
virtual BOOL PreCreateWindow(CREATESTRUCT& cs);
//}}AFX_VIRTUAL
// Implementation
protected:
// Generated message map functions
//{{AFX_MSG(MyDia)
afx_msg int OnCreate(LPCREATESTRUCT lpCreateStruct);
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};
向下面这样来实现Ｃｒｅａｔｅ函数：
m_dwStyle = (nStyle & CBRS_ALL);
CREATESTRUCT cs;
memset(&cs, 0, sizeof(cs));
cs.lpszClass = _afxWndControlBar;
cs.style = (DWORD)nStyle | WS_CHILD;
cs.hMenu = (HMENU)nID;
cs.hInstance = AfxGetInstanceHandle();
cs.hwndParent = pParentWnd->GetSafeHwnd();
// create a modeless dialog
m_lpszTemplateName = lpszTemplateName;
// initialize common controls
VERIFY(AfxDeferRegisterClass(AFX_WNDCOMMCTLS_REG));
AfxDeferRegisterClass(AFX_WNDCOMMCTLSNEW_REG);
BOOL bSuccess = CreateDlg(lpszTemplateName, pParentWnd);
m_lpszTemplateName = NULL;
if (!bSuccess)
return FALSE;
// dialog template MUST specify that the dialog
// is an invisible child window
SetDlgCtrlID(nID);
CRect rect;
GetWindowRect(&rect);
m_sizeDefault = rect.Size(); // set fixed size
// force WS_CLIPSIBLINGS
ModifyStyle(0, WS_CLIPSIBLINGS);
if (!ExecuteDlgInit(lpszTemplateName))
return FALSE;
// force the size to zero - resizing bar will occur later
SetWindowPos(NULL, 0, 0, 0, 0, SWP_NOZORDER|SWP_NOACTIVATE|SWP_SHOWWINDOW);
return TRUE;
｝
在将CReBar的WM_CHILD的属性改掉
注意：在CMainFrame中现在引用MyDia的实例。
CMainFrame::OnCreate中的
if (!m_wndDlgBar.Create(this, IDR_TEST_MAINFRAME,
CBRS_ALIGN_TOP, AFX_IDW_DIALOGBAR))
{
TRACE0("Failed to create dialogbar/n");
return -1; // fail to create
}
改为：
if (!m_wndDlgBar.Create(this, MAKEINTRESOURCE(IDR_TEST_MAINFRAME),
CBRS_ALIGN_TOP, AFX_IDW_DIALOGBAR))
{
TRACE0("Failed to create dialogbar/n");
return -1; // fail to create
}
测试通过。
这样做有什么负作用我也不知道！
Top
59楼 lolin (lolin) 一级用户 该版得分小于等于100分 回复于 2001-04-30 16:32:00 得分 0
说漏了一点：
在MyDia.ccp中加入如下头文件申明（注意顺须）：
const TCHAR _afxWndControlBar[] = "MYTEST";
#include "D:/VC6.0/VC98/MFC/SRC/AFXIMPL.H"
#include "MyDia.h"
Top
60楼 lolin (lolin) 一级用户 该版得分小于等于100分 回复于 2001-04-30 16:49:00 得分 0
对不起，原来是要在ＲｅＢａｒ上创建ＣＭｅｎｕ！（好在效果差不多）。
你最好别要ＣＴｏｏｌＢａｒ了！
Top
61楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 20:41:00 得分 0
baiqian，有例子你给我俩看看啊！
lolin，我试试你的！！
Top
62楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 21:10:00 得分 0
Create函数里的m_dwStyle 是什么东西？怎样声明的？
Top
63楼 jifeng (疾风) 二级用户 该版得分小于等于500分，大于100分 回复于 2001-04-30 21:21:00 得分 0
我看过MSDN上有篇文章，讲的是作IE风格的MenuBar,就是用Toolbar+TrackPopupMenu
还用到了Hook,太麻烦了
Top
64楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 21:22:00 得分 0
jifeng:
哪有那篇文章？快给我看看！！！！
Top
65楼 111222 (www.111222.cn) 二星用户 该版得分小于等于30000分，大于10000分 回复于 2001-04-30 21:23:00 得分 0
jifeng；
主，我都卡在这里N天了！我眼睛都绿了！
Top
66楼 ookaiii (IUnknown* pIWorld) 三级用户 该版得分小于等于1000分，大于500分 回复于 2001-05-01 00:56:00 得分 0
没人解答么？
Top
67楼 jifeng (疾风) 二级用户 该版得分小于等于500分，大于100分 回复于 2001-05-01 19:52:00 得分 0
D:/DL/msdn.microsoft.com/library/psdk/shellcc/CommCtls/FAQ/iemenubar.htm
Top
68楼 jifeng (疾风) 二级用户 该版得分小于等于500分，大于100分 回复于 2001-05-01 19:53:00 得分 10
Creating an Internet Explorer-style Menu Bar
At a glance, the Microsoft® Internet Explorer 5 menu bar looks much like a standard menu. However, it looks quite different in use. The following illustration shows the Internet Explorer menu bar with the Tools item selected.
The menu bar is actually a toolbar control that looks and functions very much like a standard menu. Instead of top-level menu items, a menu bar has a series of text-only buttons that display a drop-down menu when clicked. However, as a specialized type of toolbar, a menu bar has some capabilities that standard menus lack. As a toolbar control:
It can be customized using standard toolbar techniques, allowing the user to move, delete, or add items.
It can have hot-tracking, so that users will know when they are over a top-level item without having to click it first.
A menu bar can be incorporated into a rebar control, giving it the following features:
It can have a gripper, which allows the user to move or resize the band.
It can share a strip in the rebar control with other bands, such as the standard toolbar in the preceding illustration.
It can display a chevron when it is covered by an adjacent band, giving the user access to the hidden items.
It can have an application-defined background bitmap.
This document discusses how to implement a menu bar. Since a menu bar is a specialized implementation of a toolbar control, the focus will be on topics that are specific to menu bars. For a discussion of how to incorporate a toolbar into a rebar control, see Creating an Internet Explorer-style Toolbar and Rebar Controls.
Making a Toolbar into a Menu Bar
Handling Navigation with Menu Hot-Tracking Disabled
Handling Navigation with Menu Hot-Tracking Enabled
Making a Toolbar into a Menu Bar
To make a toolbar into a menu bar:
Create a flat toolbar by including TBSTYLE_FLAT with the other window style flags. The TBSTYLE_FLAT style also enables hot-tracking. With this style, the menu bar looks much like a standard menu until the user activates a button. Then, the button appears to stand out from the toolbar and depress when it is clicked, just like a standard button. Because hot-tracking is enabled, all that is needed to activate a button is for the cursor to hover over it. If the cursor moves to another button, it will be activated and the old button deactivated.
Create list-style buttons by including TBSTYLE_LIST with the other window style flags. This style creates a thinner button that looks more like a standard top-level menu item.
Make the buttons text-only by setting the iBitmap member of the button's TBBUTTON structure to I_IMAGENONE and the iString member to the button text.
Give each button the BTNS_DROPDOWN style. When the button is clicked, the toolbar control sends your application a TBN_DROPDOWN notification to prompt it to display the button's menu.
Incorporate the menu bar into a rebar band. Enable both grippers and chevrons, as discussed in Creating an Internet Explorer-style Toolbar.
Implement a TBN_DROPDOWN handler to display the button's drop-down menu when it is clicked. The drop-down menu is a type of pop-up menu. It is created with TrackPopupMenu, with its upper-left corner aligned with the lower-left corner of the button.
Implement keyboard navigation, so that the menu bar is fully accessible without a mouse.
Implement menu hot-tracking. With standard menus, once a top level menu item's menu has been displayed, moving the cursor over another top-level item automatically displays its menu and collapses the menu of the previous item. The toolbar control will hot-track the cursor and change the button image, but it does automatically display the new menu. Your application must do so explicitly.
Most of these items are straightforward to implement and are discussed elsewhere. See Creating an Internet Explorer-style Toolbar, Toolbar Controls, or Rebar Controls for a general discussion of how to use toolbars and rebar controls. See Menus for a discussion of how to handle pop-up menus. The final two items, keyboard navigation and menu hot-tracking, are discussed in the remainder of this document.
Handling Navigation with Menu Hot-Tracking Disabled
Users can choose to navigate the menu bar with the mouse, the keyboard, or a mixture of both. To implement menu bar navigation, your application needs to handle toolbar notifications and monitor the mouse and keyboard. This task can be broken into two distinct parts: with and without menu hot-tracking. This section discusses how to handle navigation when no menus are displayed and menu hot-tracking is not enabled.
Mouse Navigation
If menu hot-tracking is disabled, you can treat a menu bar as a normal toolbar. If the user is navigating with a mouse, all your application needs to do is handle the TBN_DROPDOWN notification. When this notification is received, display the appropriate drop-down menu, and enable menu hot-tracking. From then on, you are in the menu hot-tracking regime, discussed in Implementing Menu Hot-Tracking.
As discussed in Mixed Navigation, you also need to handle the TBN_HOTITEMCHANGE notification to keep track of the active button. This notification is irrelevant if the user is only navigating with the mouse, but it is necessary when mouse and keyboard navigation are mixed.
Keyboard Navigation
As noted in the previous section, the user can do a number of navigation operations with the keyboard when menu hot-tracking is disabled. Toolbar controls support keyboard navigation only if they have focus. They also do not handle all the key presses that are needed for menu bars. The simplest solution to handling keyboard navigation is to process the relevant key press events explicitly.
If menu hot-tracking is disabled, your application needs to handle these key press events in the following way:
The F10 key. Activate the first button with TB_SETHOTITEM.
The LEFT ARROW and RIGHT ARROW keys. Activate the adjacent button with TB_SETHOTITEM. If the user attempts to navigate off either end of the menu bar, activate the first button at the opposite end.
The ESCAPE key. Deactivate the active button with TB_SETHOTITEM. The menu bar should be returned to the state it had prior to activating the first button.
An ALT-Key accelerator key. Use the TB_MAPACCELERATOR message to determine which button the Key character corresponds to. Display the button's drop-down menu and enable menu hot-tracking.
The DOWN ARROW key. If a button is active but no menu has been displayed, display the button's menu and enable menu hot-tracking.
The ENTER key. Deactivate the active button with TB_SETHOTITEM. The menu bar should be returned to the state it had prior to activating the first button.
Mixed Navigation
The keyboard navigation handlers outlined in the preceding section basically do two tasks: keep track of the active button and display the appropriate menu when a button is selected. These handlers are sufficient as long as the user navigates only with the keyboard. However, users often mix keyboard and mouse navigation. For example, they might activate the first button with the F10 key, use the mouse to activate a different button, and then open its menu with the DOWN ARROW key. If you are only monitoring key presses to keep track of the active key, you will display the wrong menu. You must also handle the TBN_HOTITEMCHANGE notification to accurately keep track of the active button.
Handling Navigation with Menu Hot-Tracking Enabled
Once menu hot-tracking is enabled, your application must change the way it responds to user navigation. To replicate the behavior of standard menus, you must implement the following features explicitly.
With mouse navigation:
If the user moves the cursor over another button, that menu immediately appears and the previous menu disappears.
Menu hot-tracking stays active until the user selects a command or clicks a point that is not part of the menu region. Either action deactivates menu hot-tracking until another button is clicked.
If the cursor moves off the menu, the current drop-down menu remains until the cursor moves back onto, or the user clicks a point outside, the area covered by the menu. If the cursor returns to a different button than the one currently being displayed, the old menu is collapsed and the new menu is displayed.
With keyboard navigation:
The RIGHT ARROW key. If the item has a submenu, display the submenu. If the item does not have a submenu, collapse the menu and any submenus, activate the next button with TB_SETHOTITEM, and display the menu for the adjacent button. If the last button is active when this message is received, display the menu for the first button.
The LEFT ARROW key. If the item is a submenu, collapse it and shift focus to its parent menu. If the item is not a submenu, collapse the menu, activate the next button with TB_SETHOTITEM, and display the menu for that button.
Pressing the LEFT ARROW key moves the focus to the left.
If the highlighted menu item is on the primary menu, that menu is collapsed, and the menu for the adjacent button is displayed. If the active button was at the left end of the toolbar, the menu for the last button is displayed.
If the highlighted menu item is on a submenu, the submenu is collapsed, shifting the focus back to its parent.
Pressing the RIGHT ARROW key moves the focus to the right.
If the highlighted menu item does not have a submenu, the menu for the adjacent button is displayed. If the active button was at the right end of the toolbar, the menu for the last button is displayed.
If the highlighted menu item has a submenu, the submenu is displayed.
The ESCAPE key backs the display up one step.
If a submenu is displayed, it is collapsed and focus shifts to the parent menu.
If a button's menu is displayed, it is collapsed and menu hot-tracking is disabled. The item's button remains active.
If no menus are displayed but a button is active, the button is deactivated and menu hot-tracking is disabled.
The UP ARROW and DOWN ARROW keys are used only to navigate within a particular menu.
The ENTER key launches the command associated with a menu item. If the menu item has a submenu, the ENTER key displays it.
As with the menu hot-tracking disabled case, your application needs to handle mouse, keyboard, and mixed navigation. However, the fact that a menu is displayed means that messaging will have to be handled somewhat differently.
Message Processing for Menu Hot-Tracking
Menu hot-tracking requires that a menu be displayed at all times, apart from the brief interval required to switch to a new menu. However, the drop-down menu that is displayed by TrackPopupMenu is modal. Your application will continue to receive some messages directly, including WM_COMMAND, TBN_HOTITEMCHANGE, and normal menu-related messages such as WM_MENUSELECT. However, it will not receive low-level keyboard or mouse messages directly. To handle messages such as WM_MOUSEMOVE, you must set a message hook to intercept messages directed to the menu.
When a drop-down menu is displayed, set the message hook by calling SetWindowsHookEx with the idHook parameter set to WH_MSGFILTER. All messages intended for the menu will be passed to your hook procedure. For example, the following code fragment sets a message hook that will trap messages going to a drop-down menu. MsgHook is the name of the hook procedure, and hhookMsg is the handle to the procedure.
hhookMsg = SetWindowsHookEx(WH_MSGFILTER, MsgHook, HINST_THISDLL, 0);
Menu messages are identified by setting the hook procedure's nCode parameter to MSGF_MENU. The lParam parameter will point to a MSG structure with the message. The details of which messages need to be handled, and how, are discussed in the remainder of this document.
Your application must pass all messages on to the next message hook by calling CallNextHookEx. You must also send mouse messages directly to the toolbar control, making sure to convert any point coordinates to the toolbar client coordinate space. Sending the messages directly ensures that the toolbar control receives the appropriate mouse messages. For instance, the toolbar needs to receive WM_MOUSEMOVE messages in order to hot-track its buttons.
When a new button is activated, your application must collapse the old drop-down menu with a WM_CANCELMODE message, and display a new menu. It must also collapse the drop-down menu when focus is taken from the menu bar with keyboard navigation or by clicking outside the menu area. Whenever you collapse a menu, you should free its message hook with UnhookWindowsHookEx. If you need to display another drop-down menu, create a new message hook. When a command is launched, the menu will be collapsed automatically but you must explicitly free the message hook.
The following code fragment frees the message hook that was set in the previous example.
UnhookWindowsHookEx(hhookMsg);
Mouse Navigation
When a normal toolbar control hot-tracks buttons, it highlights the active button and sends the application a TBN_HOTITEMCHANGE notification each time a new button is activated. Your application is responsible for displaying the appropriate drop-down menu. It must:
Handle the TBN_HOTITEMCHANGE notification to keep track of the active button. When the active button changes, collapse the old menu and create a new one.
Handle the TBN_DROPDOWN notification that is sent when a button is clicked. It should then collapse the menu and disable menu hot-tracking. The button remains active.
Handle the WM_LBUTTONDOWN, WM_RBUTTONDOWN, and WM_MOUSEMOVE messages in your message hook procedure, to keep track of the mouse position. If the mouse is clicked outside the menu area, collapse the current drop-down menu, deactivate menu hot-tracking, and return the menu bar to its preactivation state.
When a menu command is launched, disable menu hot-tracking. The menu will be collapsed automatically but you must explicitly free the message hook.
You must also handle menu-related messaging, such as the WM_INITMENUPOPUP message that is sent when a menu item needs to display a submenu. For a discussion of how to handle such messages, see Menus.
Keyboard Navigation
Your application must process keyboard messages in the message hook procedure and act on those that affect menu hot-tracking. The following key presses need to be handled:
The ESCAPE key. The ESCAPE key backs the display up one level. If a submenu is being displayed, it must be collapsed. If a button's primary menu is displayed, collapse it and disable menu hot-tracking. The button remains active.
The RIGHT ARROW key. If the item has a submenu, display it. If the item does not have a submenu, collapse the menu and any submenus, activate the next button with TB_SETHOTITEM, and display its menu. If the last button was active when this notification was received, display the menu for the first button.
The LEFT ARROW key. If the item is in a submenu, collapse it and shift focus to its parent menu. If the item is not a submenu, collapse the menu, activate the adjacent button with TB_SETHOTITEM, and display its menu. If the first button was active when this notification was received, display the menu for the last button.
The UP ARROW and DOWN ARROW keys. These keys are used to navigate within a menu but do not directly affect menu hot-tracking.
An ALT-Key accelerator key. Use the TB_MAPACCELERATOR message to determine which button the Key character corresponds to. If it corresponds to a different button than the currently active one, collapse the current drop-down menu, activate the new button with TB_SETHOTITEM, and display the menu for the adjacent button. If the Key character corresponds to the currently displayed button, collapse the drop-down menu and disable menu hot-tracking. The button should remain active.
© 2000 Microsoft Corporation. All rights reserved. Terms of use.
Top
69楼 ookaiii (IUnknown* pIWorld) 三级用户 该版得分小于等于1000分，大于500分 回复于 2001-05-02 11:15:00 得分 0
111222快来看啊，jifeng给处解答了，为什么我给不了分？
http://msdn.microsoft.com/library/psdk/shellcc/CommCtls/FAQ/iemenubar.htm
Top
70楼 ookaiii (IUnknown* pIWorld) 三级用户 该版得分小于等于1000分，大于500分 回复于 2001-05-02 11:16:00 得分 0
好了，分给过了！
Top
相关问题
* 各位：我现在想在CReBar上设置CMenu，调用CReBar::SetMenu(...)为什么会不行？正确的做法应该是怎样的？
* 各位：我现在想在CReBar上设置CMenu，调用CReBar::SetMenu(...)为什么会不行？正确的做法应该是怎样的？ToolBar上怎样添加菜单？
网站简介－广告服务－网站地图－帮助信息－联系方式－English－问题报告
优快云北京百联美达美数码科技有限公司 版权所有 京 ICP 证 020026 号 优快云
© 2000-04, youkuaiyun.com, All Rights Reserved
扫一扫
被折叠的 条评论
为什么被折叠?
到【灌水乐园】发言
