使用mfc的動態菜單

Question

我想添加一個菜單項到我的主菜單，然後在運行時用項目填充它。我將如何做到這一點？除了添加項目，我怎麼會有他們的消息映射條目，因爲我不知道ID？

Answer 1

您可以動態創建一個CMenu對象是這樣的：

CMenu *menu = new CMenu; 
menu->CreatePopupMenu(); 
// Add items to the menu 
menu->AppendMenu(MF_STRING, menuItemID, "Text"); 
... 

然後加入這個子菜單到主菜單：

wnd->GetMenu()->AppendMenu(MF_POPUP, (UINT_PTR)menu->m_hMenu, "Menu Name"); 

至於消息映射，假設所有的菜單項ID在一定範圍內，您可以使用ON_COMMAND_RANGE將整個範圍映射到單個功能。該函數將接收ID作爲參數，並且在該函數內，可以根據ID執行不同的操作。

Answer 2

define the menu's using #define 

#define ID_SHOW 2002 
#define ID_HIDE 2004 

//create a menu object for main menu 
CMenu *menu = new CMenu(); 
menu->CreateMenu(); 

//another menu object for submenu 
CMenu *subMenu = new CMenu(); 
subMenu->CreatePopupMenu(); 
subMenu->AppendMenu(MF_STRING, ID_HIDE, _T("four")); 
subMenu->AppendMenu(MF_STRING, ID_SHOW, _T("three")); 
//append submenu to menu 
menu->AppendMenu(MF_POPUP|MF_STRING, (UINT)subMenu->m_hMenu, _T("Advanced")); 
SetMenu(menu); 

Answer 3

CMenu menuPopup; 
    menuPopup.LoadMenu(IDR_CNTXT_PLAN); 
subMenu.CreatePopupMenu(); 
subMenu.AppendMenu(MF_STRING, MENU1,"Menu1"); 
subMenu.AppendMenu(MF_STRING, MENU2,"Menu2"); 
CMenu* pMenu = menuPopup.GetSubMenu(0); 
    pMenu->InsertMenu(0,MF_BYPOSITION|MF_POPUP,(UINT)subMenu.m_hMenu,"Layers"); 
    menuPopup.GetSubMenu(0)->InsertMenu(1,MF_BYPOSITION|MF_SEPARATOR,0,""); 
menuPopup.GetSubMenu(0)->TrackPopupMenu(TPM_LEFTALIGN, point.x, point.y, this);