孙鑫VC++深入详解:Lesson6 Part4 ---CMenu 类的应用:添加子菜单项AppendMenu,插入子菜单项InsertMenu,删除菜单DeleteMenu

CMenu 类的应用 添加子菜单项AppendMenu,插入子菜单项InsertMenu,删除菜单DeleteMenu

//

CMenu::AppendMenu 

BOOL AppendMenu( UINT nFlags, UINT nIDNewItem = 0, LPCTSTR lpszNewItem = NULL );
BOOL AppendMenu( UINT nFlags, UINT nIDNewItem, const CBitmap* pBmp );


资源类对象都有一个成员变量来保存关联上的资源句柄
查看CMenu类,它有个成员变量m_hMenu:Specifies the handle to the Windows menu attached to the CMenu object. 


//------ 追加菜单,在已菜单后面追加一个子菜单 用函数CMenu::AppendMenu 
CMenu menu;
menu.CreatePopupMenu(); //初始化对象menu --- 创建一个空的弹出菜单
GetMenu()->AppendMenu(MF_POPUP,(UINT)menu.m_hMenu,"AppendMenu");
menu.Detach(); //把菜单资源与局部对象menu脱离,以免menu析构时,清除菜单.

//--

     

int CMainFrame::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
	if (CFrameWnd::OnCreate(lpCreateStruct) == -1)
		return -1;
	
	if (!m_wndToolBar.CreateEx(this, TBSTYLE_FLAT, WS_CHILD | WS_VISIBLE | CBRS_TOP
		| CBRS_GRIPPER | CBRS_TOOLTIPS | CBRS_FLYBY | CBRS_SIZE_DYNAMIC) ||
		!m_wndToolBar.LoadToolBar(IDR_MAINFRAME))
	{
		TRACE0("Failed to create toolbar\n");
		return -1;      // fail to create
	}

	if (!m_wndStatusBar.Create(this) ||
		!m_wndStatusBar.SetIndicators(indicators,
		  sizeof(indicators)/sizeof(UINT)))
	{
		TRACE0("Failed to create status bar\n");
		return -1;      // fail to create
	}

	// TODO: Delete these three lines if you don't want the toolbar to
	//  be dockable
	m_wndToolBar.EnableDocking(CBRS_ALIGN_ANY);
	EnableDocking(CBRS_ALIGN_ANY);
	DockControlBar(&m_wndToolBar);

//------ 追加菜单,在已菜单后面追加一个子菜单 用函数CMenu::AppendMenu 
	CMenu menu;
	menu.CreatePopupMenu(); //初始化对象menu --- 创建一个空的弹出菜单
	GetMenu()->AppendMenu(MF_POPUP,(UINT)menu.m_hMenu,"AppendMenu");
	menu.Detach(); //把菜单资源与局部对象menu脱离,以免menu析构时,清除菜单.	

	return 0;
}

//--

//------

//------ 插入菜单,在已有Popup菜单之间插入一个子菜单 用函数CMenu::InsertMenu

//------ 插入菜单,在已有Popup菜单之间插入一个一个子菜单 用函数CMenu::InsertMenu
	CMenu menu;
	menu.CreatePopupMenu(); //初始化对象menu --- 创建一个空的弹出菜单
	GetMenu()->InsertMenu(2,MF_BYPOSITION|MF_POPUP,(UINT)menu.m_hMenu,"InsertMenu");
	menu.Detach(); //把菜单资源与局部对象menu脱离,以免menu析构时,清除菜单.

//--- 在1(编辑)之后插入一个PopupMenu(子菜单),postion是2

//---

//---

//------ 插入菜单项,用函数CMenu::InsertMenu,再用对象menu的成员函数AppendMenu插入菜单项

//------ 插入菜单项,用函数CMenu::InsertMenu,再用对象menu的成员函数AppendMenu插入菜单项
 
	CMenu menu;
	menu.CreatePopupMenu(); //初始化对象menu --- 创建一个空的弹出菜单
	GetMenu()->InsertMenu(2,MF_BYPOSITION|MF_POPUP,(UINT)menu.m_hMenu,"InsertMenu");
	menu.AppendMenu(MF_STRING,110,"汇编"); //menu对象已经赋予了一个菜单资源,可用其成员函数操作菜单
	menu.AppendMenu(MF_STRING,111,"C++");
	menu.AppendMenu(MF_STRING,111,"JAVA");	

	// 在 "文件"子菜单的末尾追加一个菜单项
	GetMenu()->GetSubMenu(0)->AppendMenu(MF_STRING,112,"---文件END---");

   // 在 "文件"子菜单的中间插入一个菜单项:在OPEN的上面插入一个"---PrevOpen---"
	GetMenu()->GetSubMenu(0)->InsertMenu(ID_FILE_OPEN,MF_BYCOMMAND|MF_STRING,113,"---PrevOpen---");
	
	menu.Detach(); //把菜单资源与局部对象menu脱离,以免menu析构时,清除菜单.	

//---

//---

//---

//---

//---

//------ 删除子菜单,子菜单项
  对照上面的图......

GetMenu()->DeleteMenu(1,MF_BYPOSITION);//删除 "编辑"
  GetMenu()->GetSubMenu(0)->DeleteMenu(1,MF_BYPOSITION);//删除 "文件"菜单中的"---PrevOpen---"子菜单项

全部代码:

// MainFrm.cpp : implementation of the CMainFrame class
//

#include "stdafx.h"
#include "Menu2.h"

#include "MainFrm.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CMainFrame

IMPLEMENT_DYNCREATE(CMainFrame, CFrameWnd)

BEGIN_MESSAGE_MAP(CMainFrame, CFrameWnd)
	//{{AFX_MSG_MAP(CMainFrame)
		// NOTE - the ClassWizard will add and remove mapping macros here.
		//    DO NOT EDIT what you see in these blocks of generated code !
	ON_WM_CREATE()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

static UINT indicators[] =
{
	ID_SEPARATOR,           // status line indicator
	ID_INDICATOR_CAPS,
	ID_INDICATOR_NUM,
	ID_INDICATOR_SCRL,
};

/////////////////////////////////////////////////////////////////////////////
// CMainFrame construction/destruction

CMainFrame::CMainFrame()
{
	// TODO: add member initialization code here
	
}

CMainFrame::~CMainFrame()
{
}

int CMainFrame::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
	if (CFrameWnd::OnCreate(lpCreateStruct) == -1)
		return -1;
	
	if (!m_wndToolBar.CreateEx(this, TBSTYLE_FLAT, WS_CHILD | WS_VISIBLE | CBRS_TOP
		| CBRS_GRIPPER | CBRS_TOOLTIPS | CBRS_FLYBY | CBRS_SIZE_DYNAMIC) ||
		!m_wndToolBar.LoadToolBar(IDR_MAINFRAME))
	{
		TRACE0("Failed to create toolbar\n");
		return -1;      // fail to create
	}

	if (!m_wndStatusBar.Create(this) ||
		!m_wndStatusBar.SetIndicators(indicators,
		  sizeof(indicators)/sizeof(UINT)))
	{
		TRACE0("Failed to create status bar\n");
		return -1;      // fail to create
	}

	// TODO: Delete these three lines if you don't want the toolbar to
	//  be dockable
	m_wndToolBar.EnableDocking(CBRS_ALIGN_ANY);
	EnableDocking(CBRS_ALIGN_ANY);
	DockControlBar(&m_wndToolBar);

//------ 追加菜单,在已菜单后面追加一个子菜单 用函数CMenu::AppendMenu 
	/*
	CMenu menu;
	menu.CreatePopupMenu(); //初始化对象menu --- 创建一个空的弹出菜单
	GetMenu()->AppendMenu(MF_POPUP,(UINT)menu.m_hMenu,"AppendMenu");
	menu.Detach(); //把菜单资源与局部对象menu脱离,以免menu析构时,清除菜单.	
	*/

//------ 插入菜单,在已有Popup菜单之间插入一个子菜单 用函数CMenu::InsertMenu
	/*
	CMenu menu;
	menu.CreatePopupMenu(); //初始化对象menu --- 创建一个空的弹出菜单
	GetMenu()->InsertMenu(2,MF_BYPOSITION|MF_POPUP,(UINT)menu.m_hMenu,"InsertMenu");//2是子菜单出现的位置(index=2)
	menu.Detach(); //把菜单资源与局部对象menu脱离,以免menu析构时,清除菜单.
    */
	
//------ 插入菜单项,用函数CMenu::InsertMenu,再用对象menu的成员函数AppendMenu插入菜单项
 
	CMenu menu;
	menu.CreatePopupMenu(); //初始化对象menu --- 创建一个空的弹出菜单
	GetMenu()->InsertMenu(2,MF_BYPOSITION|MF_POPUP,(UINT)menu.m_hMenu,"InsertMenu");
	menu.AppendMenu(MF_STRING,110,"汇编"); //menu对象已经赋予了一个菜单资源,可用其成员函数操作菜单
	menu.AppendMenu(MF_STRING,111,"C++");
	menu.AppendMenu(MF_STRING,111,"JAVA");	

	// 在 "文件"子菜单的末尾追加一个菜单项
	GetMenu()->GetSubMenu(0)->AppendMenu(MF_STRING,112,"---文件END---");

   // 在 "文件"子菜单的中间插入一个菜单项:在OPEN的上面插入一个"---PrevOpen---"
	GetMenu()->GetSubMenu(0)->InsertMenu(ID_FILE_OPEN,MF_BYCOMMAND|MF_STRING,113,"---PrevOpen---");	
	menu.Detach(); //把菜单资源与局部对象menu脱离,以免menu析构时,清除菜单.	

//------ 删除子菜单,子菜单项
	GetMenu()->DeleteMenu(1,MF_BYPOSITION);//删除 "编辑"
    GetMenu()->GetSubMenu(0)->DeleteMenu(1,MF_BYPOSITION);//删除 "文件"菜单中的"---PrevOpen---"子菜单项

	return 0;
}

BOOL CMainFrame::PreCreateWindow(CREATESTRUCT& cs)
{
	if( !CFrameWnd::PreCreateWindow(cs) )
		return FALSE;
	// TODO: Modify the Window class or styles here by modifying
	//  the CREATESTRUCT cs

	return TRUE;
}

/////////////////////////////////////////////////////////////////////////////
// CMainFrame diagnostics

#ifdef _DEBUG
void CMainFrame::AssertValid() const
{
	CFrameWnd::AssertValid();
}

void CMainFrame::Dump(CDumpContext& dc) const
{
	CFrameWnd::Dump(dc);
}

#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CMainFrame message handlers