CMDIFrameWnd::MDISetMenu

替换MDI框架窗口中的菜单上,窗口弹出菜单或两个。

CMenu* MDISetMenu(
   CMenu* pFrameMenu,
   CMenu* pWindowMenu 
);

参数

  • pFrameMenu
    指定新框架窗口"菜单"中。 如果,菜单未更改 NULL

  • pWindowMenu
    指定新窗口弹出菜单的菜单。 如果,菜单未更改 NULL

返回值

此消息交换的框架窗口菜单的指针。 指针可能是瞬态的,不应存储以供将来使用。

备注

在调用 MDISetMenu后,应用程序必须调用 CWndDrawMenuBar 成员函数更新菜单栏。

如果此调用替换"窗口弹出菜单,MDI子窗口菜单项从上一个窗口菜单中移除并添加到新窗口弹出菜单。

如果MDI子窗口最大化,则调用替换MDI框架窗口菜单,控制菜单和还原控件以前框架窗口菜单中移除并将其添加到新菜单。

如果使用框架管理您的MDI子窗口,则不要调用该成员函数。

示例

// CMdiView::OnReplaceMenu() is a menu command handler for CMdiView
// class, which in turn is a CView-derived class. It loads a new
// menu resource and replaces the main application window's menu
// bar with this new menu.
void CMdiView::OnReplaceMenu() 
{
   // Load a new menu resource named IDR_SHORT_MENU. m_hDefaultMenu is 
   // a member variable of CMdiDoc class (a CDocument-derived class). 
   // Its type is HMENU.
   CMdiDoc* pdoc = (CMdiDoc*)GetDocument();
   pdoc->m_hDefaultMenu = 
      ::LoadMenu(AfxGetResourceHandle(), MAKEINTRESOURCE(IDR_SHORT_MENU));
   if (pdoc->m_hDefaultMenu == NULL)
      return;

   // Get the parent window of this view window. The parent window is
   // a CMDIChildWnd-derived class. We can then obtain the MDI parent 
   // frame window using the CMDIChildWnd*. Then, replace the current 
   // menu bar with the new loaded menu resource.
   CMDIFrameWnd* frame = ((CMDIChildWnd*)GetParent())->GetMDIFrame();
   frame->MDISetMenu(CMenu::FromHandle(pdoc->m_hDefaultMenu), NULL);
   frame->DrawMenuBar();
}
// GetDefaultMenu() is an undocumented virtual function for 
// CDocument class. It allows the document to determine which 
// menu to display. m_hDefaultMenu is of type HMENU. Its value
// is initialized to NULL either in the constructor or 
// CDocument::OnNewDocument(). And the menu resource is destroyed
// in the destructor to avoid having too many menus loaded at once.
HMENU CMdiDoc::GetDefaultMenu()
{
   if (m_hDefaultMenu)
      return m_hDefaultMenu;

   return COleServerDoc::GetDefaultMenu();
}

// Initialize member variable(s) in the constructor. CMdiDoc is
// a CDocument-derived class.
CMdiDoc::CMdiDoc()
{
   // Use OLE compound files
   EnableCompoundFile();

   m_hDefaultMenu = NULL; // initialize to NULL
}

// Destroy menu resource in CMdiDoc's destructor. CMdiDoc is
// a CDocument-derived class.
CMdiDoc::~CMdiDoc()
{
   if (m_hDefaultMenu)
      ::DestroyMenu(m_hDefaultMenu);
}

要求

Header: afxwin.h

请参见

参考

CMDIFrameWnd选件类

层次结构图

CWnd::DrawMenuBar

WM_MDISETMENU