CMDIFrameWnd::MDISetMenu
Visual Studio 2012
Replaces the menu of an MDI frame window, the Window pop-up menu, or both.
CMenu* MDISetMenu( CMenu* pFrameMenu, CMenu* pWindowMenu );
After calling MDISetMenu, an application must call the DrawMenuBar member function of CWnd to update the menu bar.
If this call replaces the Window pop-up menu, MDI child-window menu items are removed from the previous Window menu and added to the new Window pop-up menu.
If an MDI child window is maximized and this call replaces the MDI frame-window menu, the Control menu and restore controls are removed from the previous frame-window menu and added to the new menu.
Do not call this member function if you use the framework to manage your MDI child windows.
// 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); }
