MFC下一個簡單的按鈕重繪，功能不是那麼全

#if !defined(AFX_BMPBUTTON_H__FBB70540_EC88_4021_9272_574C1A7A571B__INCLUDED_)
#define AFX_BMPBUTTON_H__FBB70540_EC88_4021_9272_574C1A7A571B__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
// BmpButton.h : header file
//

/////////////////////////////////////////////////////////////////////////////
// CBmpButton window

class CBmpButton : public
 
 CButton
{
// Construction
public:
    BOOL m_bNonToolBarBtn;
    UINT m_uiDisBmpID;
    UINT m_uiNorBmpID;
    CBmpButton();
    void SetNonToolBarBtn(BOOL bBtn);
    void SetBitmap(UINT nBmpID);
    void SetItemData(DWORD dwData){m_dwData=dwData;}
    void SetDisableBmp(UINT nBmpID){m_uiDisBmpID=nBmpID;}
    void
 
 SetNormalBmp(UINT nBmpID){m_uiNorBmpID=nBmpID;}
/*
OK                      可用    不可用                                       SetNorBmp     SetDisBmp
Select All              可用    可用
Zoomin                  可用    不可用      可用     不可用                   SetNorBmp     SetDisBmp         SetNorBmp     SetDisBmp
*/
 

    DWORD GetItemData(){return m_dwData;}
// Attributes
public:

// Operations
public:

// Overrides
    // ClassWizard generated virtual function overrides
    //{{AFX_VIRTUAL(CBmpButton)
    public:
    virtual void DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct);
    protected:
    virtual void PreSubclassWindow();
    afx_msg LRESULT OnMouseLeave(WPARAM wParam, LPARAM lParam);
    afx_msg LRESULT OnMouseHover(WPARAM wParam, LPARAM lParam);
    //}}AFX_VIRTUAL

// Implementation
public:
    virtual ~CBmpButton();

    // Generated message map functions
protected:
    //{{AFX_MSG(CBmpButton)
    afx_msg HBRUSH OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor);
    afx_msg void OnCaptureChanged(CWnd *pWnd);
    afx_msg void OnKillFocus(CWnd* pNewWnd);
    afx_msg void OnMouseMove(UINT nFlags, CPoint point);
    afx_msg void OnSize(UINT nType, int cx, int cy);
    afx_msg BOOL OnEraseBkgnd(CDC* pDC);
    afx_msg BOOL OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message);
    //}}AFX_MSG
    void ResetWndRgn();
    DECLARE_MESSAGE_MAP()
private:
    BOOL    m_bIsTracking;
    BOOL    m_bIsHovering;
    HBITMAP m_hBitmap;
    BOOL    m_MouseOnButton;
    DWORD  m_dwData;
};

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

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_BMPBUTTON_H__FBB70540_EC88_4021_9272_574C1A7A571B__INCLUDED_)

實現

// BmpButton.cpp : implementation file
//

#include "stdafx.h"
#include "BmpButton.h"
#include "resource.h"

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

extern CFont* g_DisplayFont24;
/////////////////////////////////////////////////////////////////////////////
// CBmpButton

CBmpButton::CBmpButton()
{
    m_hBitmap=NULL;
    m_MouseOnButton=FALSE;
    m_dwData=0xFFFFFFFF;

    m_bIsTracking = FALSE;
    m_bIsHovering = FALSE;
    m_uiDisBmpID = -1;
    m_uiNorBmpID = -1;
    m_bNonToolBarBtn = FALSE;
}

CBmpButton::~CBmpButton()
{
    if(m_hBitmap)::DeleteObject(m_hBitmap);
}
BEGIN_MESSAGE_MAP(CBmpButton, CButton)
    //{{AFX_MSG_MAP(CBmpButton)
    ON_WM_CTLCOLOR()
    ON_WM_CAPTURECHANGED()
    ON_WM_KILLFOCUS()
    ON_WM_MOUSEMOVE()
    ON_WM_SIZE()
    ON_WM_ERASEBKGND()
    ON_WM_SETCURSOR()
    ON_MESSAGE(WM_MOUSELEAVE, OnMouseLeave)
    ON_MESSAGE(WM_MOUSEHOVER, OnMouseHover)
    //}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CBmpButton message handlers

HBRUSH CBmpButton::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor) 
{
    return (HBRUSH)::GetStockObject(NULL_BRUSH);
}
void CBmpButton::PreSubclassWindow() 
{
    ModifyStyle(0,BS_OWNERDRAW);    
    ResetWndRgn();
    CButton::PreSubclassWindow();
}
void CBmpButton::OnMouseMove(UINT nFlags, CPoint point)
{
    CWnd* pWnd;
    CWnd* pParent;

    if(!m_bIsTracking)
    {
        TRACKMOUSEEVENT tme;
        tme.cbSize      = sizeof(tme);
        tme.hwndTrack   = m_hWnd;
        tme.dwFlags     = TME_LEAVE|TME_HOVER;
        tme.dwHoverTime = 1;
        m_bIsTracking = _TrackMouseEvent(&tme);
    }
    CButton::OnMouseMove(nFlags, point);

    if (nFlags & MK_LBUTTON && m_MouseOnButton == FALSE) return;

    pWnd = GetActiveWindow();
    pParent = GetOwner();

    if ((GetCapture() != this) && (pWnd != NULL && pParent != NULL)) 
    {
        m_MouseOnButton = TRUE;
        SetFocus();
        SetCapture();
        Invalidate();
    }
    else
    {
        CRect rc;
        GetClientRect(&rc);
        if(!rc.PtInRect(point))
        {
            if(m_MouseOnButton == TRUE)
            {
                m_MouseOnButton = FALSE;
                Invalidate();
            }
            if(!(nFlags & MK_LBUTTON)) ReleaseCapture();
        }
    }
}

LRESULT CBmpButton::OnMouseLeave(WPARAM wParam, LPARAM lParam)
{
    m_bIsTracking = FALSE;
    m_bIsHovering = FALSE;
    Invalidate();
    return 0;
}

LRESULT CBmpButton::OnMouseHover(WPARAM wParam, LPARAM lParam)
{
    m_bIsHovering = TRUE;
    Invalidate();
    return 0;
}

void CBmpButton::OnKillFocus(CWnd * pNewWnd)
{
    CButton::OnKillFocus(pNewWnd);

    if(m_MouseOnButton == TRUE){
        m_MouseOnButton = FALSE;
        Invalidate();
    }
}
void CBmpButton::OnCaptureChanged(CWnd *pWnd) 
{
    if (m_MouseOnButton == TRUE){
        ReleaseCapture();
        Invalidate();
    }
    CButton::OnCaptureChanged(pWnd);
}
void CBmpButton::SetBitmap(UINT nBmpID)
{
    HINSTANCE   hInstResource   = NULL; 
    hInstResource = AfxFindResourceHandle(MAKEINTRESOURCE(nBmpID), RT_BITMAP);
    if(m_hBitmap)::DeleteObject(m_hBitmap);
    m_hBitmap = (HBITMAP)::LoadImage(hInstResource, MAKEINTRESOURCE(nBmpID), IMAGE_BITMAP, 0, 0, 0);
}
void CBmpButton::ResetWndRgn()
{
    CRect rcItem;
    GetClientRect(&rcItem);
#define DOTS    5
    CPoint pt[8];
    pt[0].x=DOTS;               pt[0].y=0;
    pt[1].x=rcItem.right-DOTS;  pt[1].y=0;
    pt[2].x=rcItem.right;       pt[2].y=DOTS;
    pt[3].x=rcItem.right;       pt[3].y=rcItem.bottom-DOTS;
    pt[4].x=rcItem.right-DOTS;  pt[4].y=rcItem.bottom;
    pt[5].x=DOTS;               pt[5].y=rcItem.bottom;
    pt[6].x=rcItem.left;        pt[6].y=rcItem.bottom-DOTS;
    pt[7].x=rcItem.left;        pt[7].y=DOTS;

    HRGN hRgn=::CreatePolygonRgn(pt,8,ALTERNATE);
//  HRGN hRgn = CreateRoundRectRgn(0,0,rcItem.right-rcItem.left,rcItem.bottom-rcItem.top,50,50);
    SetWindowRgn(hRgn,TRUE);
    ::DeleteObject(hRgn);
}

void CBmpButton::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct) 
{
    HDC hDC          = lpDrawItemStruct->hDC;
    BOOL bIsPressed  = (lpDrawItemStruct->itemState & ODS_SELECTED);
    BOOL bIsFocused  = (lpDrawItemStruct->itemState & ODS_FOCUS);
    BOOL bIsDisabled = (lpDrawItemStruct->itemState & ODS_DISABLED);
    CRect rcItem     = lpDrawItemStruct->rcItem;
    CDC *pDC=CDC::FromHandle(lpDrawItemStruct->hDC);

    CString strTitle;
    GetWindowText(strTitle);

    CFont *pOldFont=pDC->SelectObject(g_DisplayFont24);
    CSize szText=pDC->GetTextExtent(strTitle);

    ::SetBkMode(hDC,TRANSPARENT);

    CRect rcCalc=rcItem;
    if(bIsDisabled)
    {
        pDC->FillSolidRect(&rcItem,RGB(97,198,49));
        pDC->SetTextColor(RGB(128,128,128));
    }
    else if(m_bIsHovering)
    {
        CBrush brsh;
        brsh.CreateSolidBrush(RGB(32,143,255));//76,137,189     18,118,191
        CPoint pt(10,10);
        CPen pen(PS_SOLID,1,RGB(32,143,255));//76,137,189       18,118,191
        pDC->SelectObject(&brsh);
        pDC->SelectObject(&pen);
        pDC->RoundRect(&rcItem,pt);
        if(bIsPressed)
            pDC->SetTextColor(RGB(255,0,0));
        else
            pDC->SetTextColor(RGB(0,0,0));
    }
    else
    {
//      pDC->FillSolidRect(&rcItem,RGB(97,198,49));
        pDC->SetTextColor(RGB(0,0,0));//設定按鈕文字的顏色
        CPen pen(PS_SOLID,1,RGB(0,128,255));//98,177,245        8,109,169
        CBrush brsh;
        brsh.CreateSolidBrush(RGB(0,128,255));//98,177,245      8,109,169
        CPoint pt(10,10);
        pDC->SelectObject(&brsh);
        pDC->SelectObject(&pen);
        pDC->RoundRect(&rcItem,pt);
    }

    if(szText.cx>rcItem.Width())
    {
        rcCalc.left = rcItem.left;
        rcCalc.right= rcItem.right;
    }
    else
    {
        rcCalc.left = (rcItem.Width()-szText.cx)/2;
        rcCalc.right= rcCalc.left+szText.cx;
    }
    rcCalc.top = rcItem.top;
    rcCalc.bottom = rcItem.bottom;

    pDC->DrawText(strTitle,rcCalc,/*DT_WORDBREAK*/DT_CENTER|DT_VCENTER|DT_SINGLELINE);
    pDC->SelectObject(pOldFont);
}

void CBmpButton::OnSize(UINT nType, int cx, int cy) 
{
    CButton::OnSize(nType, cx, cy);
    if(IsWindow(m_hWnd))ResetWndRgn();
}

BOOL CBmpButton::OnEraseBkgnd(CDC* pDC) 
{
    return TRUE;
}

BOOL CBmpButton::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message)
{
    ::SetCursor(AfxGetApp()->LoadStandardCursor(MAKEINTRESOURCE(32649)));
    return TRUE;
}

void CBmpButton::SetNonToolBarBtn(BOOL bBtn)
{
    m_bNonToolBarBtn = bBtn;
}
//////////////////////////////////////////////////////////////////////////
/*
void CBmpButton::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct) 
{
    HDC hDC          = lpDrawItemStruct->hDC;
    BOOL bIsDisabled = (lpDrawItemStruct->itemState & ODS_DISABLED);
    CRect rcItem     = lpDrawItemStruct->rcItem;
    CDC *pDC=CDC::FromHandle(lpDrawItemStruct->hDC);
    HDC hMemDC;

    CString strTitle;
    GetWindowText(strTitle);
    CSize szText=pDC->GetTextExtent(strTitle);
    CFont *pOldFont=pDC->SelectObject(g_DisplayFont16);

    ::SetBkMode(hDC,TRANSPARENT);

    CRect rcCalc=rcItem;
    CRect rcBmp(0,0,39,36);

    if(bIsDisabled)
        pDC->SetTextColor(RGB(128,128,128));
    else if(m_bIsHovering)
    {
        HRGN hRgnRct;
        hRgnRct = CreateRoundRectRgn(0,0,rcItem.right-rcItem.left,rcItem.bottom-rcItem.top,5,5);
        SetWindowRgn(hRgnRct,TRUE);

        pDC->FillSolidRect(&rcItem,RGB(255,255,255));
        pDC->SetTextColor(RGB(0,0,0));
    }
    else
    {
        HRGN hRgnRct;
        hRgnRct = CreateRoundRectRgn(0,0,rcItem.right-rcItem.left,rcItem.bottom-rcItem.top,5,5);
        SetWindowRgn(hRgnRct,TRUE);

        pDC->FillSolidRect(&rcItem,RGB(23,75,153));
        pDC->SetTextColor(RGB(255,255,255));
    }


    if(szText.cx>rcItem.Width())
    {
        rcCalc.left = rcItem.left;
        rcCalc.right= rcItem.right;
    }
    else
    {14
        rcCalc.left = (rcItem.Width()-szText.cx)/2;
        rcCalc.right= rcCalc.left+szText.cx;
    }
    rcCalc.top = rcBmp.Height()+5;
    rcCalc.bottom = rcItem.bottom;

    hMemDC=::CreateCompatibleDC(hDC);
    ::SelectObject(hMemDC,m_hBitmap);
    ::SetStretchBltMode(hDC,COLORONCOLOR);
    ::StretchBlt(hDC,(rcItem.Width()-rcBmp.Width())/2,5,rcBmp.Width(),rcBmp.Height(),hMemDC,rcBmp.left,rcBmp.top,rcBmp.Width(),rcBmp.Height(),SRCCOPY);

    pDC->DrawText(strTitle,rcCalc,DT_WORDBREAK);

    pDC->SelectObject(pOldFont);
    ::DeleteDC(hMemDC);
}*/