自绘菜单的实现

CCustomMenu m_cCustomMenu;
MENUDATA menuData [8];	// as many menu items are present , You should be able to use
//new and do the same
2、调用CreateMenu()设置有关参数。

m_customMenu.CreateMenu ();
m_customMenu.SetIconSize (25,25);	//This is to set the size of the Icon.
// This should be used only once for any menu
// in order to resize it, destroy and create the menu again with  different size.
m_customMenu.SetHighlightStyle (Normal); //Or TextOnly, if you want the
// background color to remain the same
// and the Text color to change to the Highlight color.
// The following setXXXColor sets the menu colors. If you dont want to change any, Dont call these member functions.

	       m_customMenu.SetTextColor (RGB (255,0,0));
m_customMenu.SetBackColor (RGB (255,255,255));
m_customMenu.SetHighlightColor (RGB (0,0,255));
3、设置MENUDATA变量，并增加菜单项。
	    lstrcpy (menuData[0].menuText , "text1");
menuData[0].menuIconNormal= IDI_ICON1;
m_customMenu.AppendMenu (MF_OWNERDRAW,3,(LPCTSTR)menuData);

3、在你的窗口中重载OnMeasureItem(...)函数。

void CMyView::OnMeasureItem(int nIDCtl, LPMEASUREITEMSTRUCT lpMeasureItemStruct)
{
if ( lpMeasureItemStruct->CtlType == ODT_MENU &&
IsMenu((HMENU)lpMeasureItemStruct->itemID) &&
(lpMeasureItemStruct->itemID == (UINT)m_hMenuSub) )
{
m_customMenu.MeasureItem (lpMeasureItemStruct);
}
else
// let MFC's self-drawing handle it
CView::OnMeasureItem(nIDCtl, lpMeasureItemStruct);
}

void SetTextColor (COLORREF );
void SetBackColor (COLORREF);
void SetHighlightColor (COLORREF);
void SetIconSize (int, int);
void SetHighlightStyle (HIGHLIGHTSTYLE ); // HIGHLIGHTSTYLE : enum {Normal, TextOnly}
void SetHighlightTextColor (COLORREF);

下面是文件代码：
//*************************************************************************
// CustomMenu.h : header file
//

#if
!defined(AFX_CUSTOMMENU_H__FE5B01C3_1E02_11D1_B87A_0060979CDF6D__INCLUDED_)
#define AFX_CUSTOMMENU_H__FE5B01C3_1E02_11D1_B87A_0060979CDF6D__INCLUDED_

#if _MSC_VER >= 1000
#pragma once
#endif // _MSC_VER >= 1000
class MENUDATA
{
public:
MENUDATA () { menuIconNormal = -1; menuIconSelected = -1;};
char  menuText[32];
UINT menuIconNormal;
UINT menuIconSelected;
};

typedef enum {Normal,TextOnly} HIGHLIGHTSTYLE;

///////////////////////////////////////////////////////////////////////////
//
// CCustomMenu window

class CCustomMenu : public CMenu
{
// Construction
public:
CCustomMenu();

// Attributes
public:

// Operations
public:

// Overrides
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CCustomMenu)
//}}AFX_VIRTUAL

// Implementation
public:
virtual ~CCustomMenu();
virtual void DrawItem( LPDRAWITEMSTRUCT);
virtual void MeasureItem( LPMEASUREITEMSTRUCT );
void SetTextColor (COLORREF );
void SetBackColor (COLORREF);
void SetHighlightColor (COLORREF);
void SetIconSize (int, int);
void SetHighlightStyle (HIGHLIGHTSTYLE );
void SetHighlightTextColor (COLORREF);

// Generated message map functions
protected:
COLORREF m_crText;
COLORREF m_clrBack;
COLORREF m_clrText;
COLORREF m_clrHilight;
COLORREF m_clrHilightText;
LOGFONT m_lf;
CFont m_fontMenu;
UINT m_iMenuHeight;
BOOL m_bLBtnDown;
CBrush m_brBackground,m_brSelect;
CPen m_penBack;
int m_iconX,m_iconY;
HIGHLIGHTSTYLE m_hilightStyle;

//{{AFX_MSG(CCustomMenu)
// NOTE - the ClassWizard will add and remove member functions here.
//}}AFX_MSG
};

///////////////////////////////////////////////////////////////////////////
//

//{{AFX_INSERT_LOCATION}}
// Microsoft Developer Studio will insert additional declarations immediately before the previous line.

#endif //!defined(AFX_CUSTOMMENU_H__FE5B01C3_1E02_11D1_B87A_0060979CDF6D__INCLUDED_)

//*************************************************************************
// CustomMenu.cpp : implementation file
//

#include "stdafx.h"
#include "CustomMenu.h"

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

///////////////////////////////////////////////////////////////////////////
//
// CCustomMenu

CCustomMenu::CCustomMenu()
{
m_clrText =  GetSysColor (COLOR_MENUTEXT);
m_clrBack = GetSysColor (COLOR_MENU);
m_brBackground.CreateSolidBrush (m_clrBack);
m_penBack.CreatePen (PS_SOLID,0,m_clrBack);
m_crText = m_clrText;
m_bLBtnDown = FALSE;
m_iconX =		GetSystemMetrics ( SM_CXMENUCHECK);
m_iconY =		GetSystemMetrics (SM_CYMENUCHECK );

m_clrHilight = GetSysColor (COLOR_HIGHLIGHT);
m_brSelect.CreateSolidBrush (m_clrHilight);
m_clrHilightText = GetSysColor (COLOR_HIGHLIGHTTEXT);

ZeroMemory ((PVOID) &m_lf,sizeof (LOGFONT));
NONCLIENTMETRICS nm;
nm.cbSize = sizeof (NONCLIENTMETRICS);

//Get the system metrics for the Captionfromhere
VERIFY (SystemParametersInfo (SPI_GETNONCLIENTMETRICS,0,&nm,0));

m_lf =  nm.lfMenuFont;
m_iMenuHeight = nm.iMenuHeight;
m_fontMenu.CreateFontIndirect (&m_lf);
}

CCustomMenu::~CCustomMenu()
{
if ((HBRUSH) m_brBackground != NULL)
m_brBackground.DeleteObject ();
if ((HFONT)m_fontMenu !=NULL)
m_fontMenu.DeleteObject ();
if ((HBRUSH)m_brSelect != NULL)
m_brSelect.DeleteObject ();
}

///////////////////////////////////////////////////////////////////////////
//
// CCustomMenu message handlers

void CCustomMenu::DrawItem (LPDRAWITEMSTRUCT lpDIS)
{
ASSERT(lpDIS != NULL);

CDC* pDC = CDC::FromHandle(lpDIS->hDC);
CRect rect;
HICON hIcon;
COLORREF crText = m_crText;
// draw the colored rectangle portion
rect.CopyRect(&lpDIS->rcItem);

// draw the up/down/focused/disabled state

UINT action = lpDIS->itemAction;
UINT state = lpDIS->itemState;
CString strText;
LOGFONT lf;
lf = m_lf;

CFont dispFont;
CFont *pFont;
//GetWindowText(strText);
if (lpDIS->itemData != NULL)
{
strText = (((MENUDATA*) (lpDIS->itemData))->menuText);
if ((((MENUDATA *)(lpDIS->itemData))->menuIconNormal) == -1)
hIcon = NULL;
else if (state & ODS_SELECTED)
{
if ((((MENUDATA *)(lpDIS->itemData))->menuIconSelected) != -1)
hIcon = AfxGetApp ()->LoadIcon (((MENUDATA *)(lpDIS->itemData))->menuIconSelected);
else
hIcon = AfxGetApp()->LoadIcon (((MENUDATA*)(lpDIS->itemData))->menuIconNormal);
}
else
hIcon = AfxGetApp()->LoadIcon (((MENUDATA*)(lpDIS->itemData))->menuIconNormal);

TRACE1 ("Draw for %s/n", strText);
}
else
{
strText.Empty();
hIcon = NULL;
}

if ( (state & ODS_SELECTED) )
{
// draw the down edges

CPen *pOldPen = pDC->SelectObject (&m_penBack);

//You need only Text highlight and thats what you get
if (m_hilightStyle != Normal)
{
pDC->FillRect (rect,&m_brBackground);
}
else
{
pDC->FillRect (rect,&m_brSelect);
}

pDC->SelectObject (pOldPen);
pDC->Draw3dRect (rect,GetSysColor (COLOR_3DHILIGHT),GetSysColor(COLOR_3DSHADOW));
lf.lfWeight = FW_BOLD;
if ((HFONT)dispFont != NULL)
dispFont.DeleteObject ();
dispFont.CreateFontIndirect (&lf);
crText = m_clrHilightText;

//While selected move the text a bit
TRACE0 ("SELECT,SELECTED/n");
}
else
{
CPen *pOldPen = pDC->SelectObject (&m_penBack);
pDC->FillRect (rect,&m_brBackground);
pDC->SelectObject (pOldPen);
// draw the up edges
pDC->Draw3dRect (rect,m_clrBack,m_clrBack);
if ((HFONT)dispFont != NULL)
dispFont.DeleteObject ();
dispFont.CreateFontIndirect (&lf); //Normal

TRACE0 ("SELECT, NORMAL/n");
}

// draw the text if there is any
//We have to paint the text only if the image is nonexistant
if (hIcon != NULL)
{
if(DrawIconEx (pDC->GetSafeHdc(),rect.left,rect.top,hIcon,
(m_iconX)?m_iconX:32,(m_iconY)?m_iconY:32,0,NULL,DI_NORMAL))
TRACE0("Wrote the icon successfully/n");
else
TRACE0 ("SORRY.NOGO/n");
}
//This is needed always so that we can have the space for check marks
rect.left = rect.left +((m_iconX)?m_iconX:32);

if ( !strText.IsEmpty())
{
//		pFont->GetLogFont (&lf);

int		  iOldMode = pDC->GetBkMode();

pDC->SetBkMode( TRANSPARENT);

pDC->SetTextColor( crText);

pFont = pDC->SelectObject (&dispFont);
TRACE1( "About To DrawText %s/n",strText);
pDC->DrawText (strText,rect,DT_LEFT|DT_SINGLELINE|DT_VCENTER);
TRACE0("Done/n");
pDC->SetBkMode( iOldMode );
pDC->SelectObject (pFont); //set it to the old font
}
dispFont.DeleteObject ();
}

void CCustomMenu::MeasureItem( LPMEASUREITEMSTRUCT lpMIS )
{
CDC *pDC = AfxGetApp()->m_pMainWnd->GetDC();
CFont* pFont = pDC->SelectObject (&m_fontMenu);
int iconX = 0,iconY= 0;
TEXTMETRIC tm;
pDC->GetTextMetrics (&tm);
pDC->SelectObject (pFont);
AfxGetApp()->m_pMainWnd->ReleaseDC (pDC);

if (m_iconX)
iconX = m_iconX;
if (m_iconY)
iconY = m_iconY;

lpMIS->itemWidth = iconX + tm.tmAveCharWidth *  lstrlen(((MENUDATA*)(lpMIS->itemData))->menuText) +10;
lpMIS->itemHeight = (iconY > (m_iMenuHeight+1))?iconY:m_iMenuHeight + 1;
}

void CCustomMenu::SetIconSize (int width, int height)
{
m_iconX = width;
m_iconY = height;
}

void CCustomMenu::SetTextColor (COLORREF clrText)
{
m_crText = clrText;
}

void CCustomMenu::SetBackColor (COLORREF clrBack)
{
m_clrBack = clrBack;
if ((HBRUSH)m_brBackground != NULL)
m_brBackground.DeleteObject ();
m_brBackground.CreateSolidBrush (clrBack);
}

void CCustomMenu::SetHighlightColor (COLORREF clrHilight)
{
m_clrHilight = clrHilight;
if ((HBRUSH)m_brSelect != NULL)
m_brSelect.DeleteObject ();
m_brSelect.CreateSolidBrush (clrHilight);
}

void CCustomMenu::SetHighlightTextColor (COLORREF clrHilightText)
{
m_clrHilightText = clrHilightText;
}

void CCustomMenu::SetHighlightStyle (HIGHLIGHTSTYLE hilightStyle)
{
m_hilightStyle = hilightStyle;
}
//*************************************************************************