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Question

MFC对话框程序
我要改变对话框上按钮，使按钮既载入位图又能显示caption.因为现在将button的bitmap属性勾上后，显示不了caption了
谢谢

Answer 1

#if !defined(AFX_FLATB_H__A0160941_6A72_43F1_A2B8_5C1848A91662__INCLUDED_)
#define AFX_FLATB_H__A0160941_6A72_43F1_A2B8_5C1848A91662__INCLUDED_#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
// FlatB.h : header file
///////////////////////////////////////////////////////////////////////////////
// FlatB windowclass FlatB : public CButton
{
// Construction
public:
FlatB();// Attributes
public:// Operations
public:// Overrides
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(FlatB)
public:
virtual void DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct);
//}}AFX_VIRTUAL// Implementation
public:
virtual ~FlatB(); // Generated message map functions
protected:
//{{AFX_MSG(FlatB)
afx_msg void OnMouseMove(UINT nFlags, CPoint point);
afx_msg void OnLButtonUp(UINT nFlags, CPoint point);
afx_msg void OnTimer(UINT nIDEvent);
//}}AFX_MSG DECLARE_MESSAGE_MAP()
private:
bool  m_blnRaised;//当鼠标指针在客户区移动时，是否为突起状态
CRect  m_rectFocus;//焦点虚线框
bool  m_blnFocus;//是否获得焦点
CRect  m_rectClient;//客户区范围
CString  m_strCaption;//按扭标题
};///////////////////////////////////////////////////////////////////////////////{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.#endif // !defined(AFX_FLATB_H__A0160941_6A72_43F1_A2B8_5C1848A91662__INCLUDED_)

Answer 2

// FlatB.cpp : implementation file
//#include "stdafx.h"
#include "FlatButton.h"
#include "FlatB.h"#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif/////////////////////////////////////////////////////////////////////////////
// FlatBFlatB::FlatB()
{
m_blnRaised=false;
}FlatB::~FlatB()
{
}
BEGIN_MESSAGE_MAP(FlatB, CButton)
//{{AFX_MSG_MAP(FlatB)
ON_WM_MOUSEMOVE()
ON_WM_LBUTTONUP()
ON_WM_TIMER()
//}}AFX_MSG_MAP
END_MESSAGE_MAP()/////////////////////////////////////////////////////////////////////////////
// FlatB message handlersvoid FlatB::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct) 
{
// TODO: Add your code to draw the specified item
HICON hIcon;
ICONINFO iconinfo;
BITMAP bm;
HBITMAP hBitmap; TEXTMETRIC textMetric; m_rectClient.CopyRect(&lpDrawItemStruct->rcItem);
m_rectFocus.CopyRect(&m_rectClient);
m_rectFocus.DeflateRect(4,4,4,4); CDC *pDc=CDC::FromHandle(lpDrawItemStruct->hDC); pDc->FillSolidRect(&m_rectClient,::GetSysColor(COLOR_BTNFACE)); if(lpDrawItemStruct->itemState&ODS_SELECTED)
{
pDc->Draw3dRect(&m_rectClient,::GetSysColor(COLOR_BTNSHADOW),::GetSysColor(COLOR_BTNSHADOW));
}
else
{
pDc->Draw3dRect(&m_rectClient,::GetSysColor(COLOR_BTNFACE),::GetSysColor(COLOR_BTNFACE));
}
hIcon=GetIcon();
if(hIcon)
{
CRect rectIcon;
rectIcon.CopyRect(m_rectClient);
rectIcon.DeflateRect(2,2,2,2);
GetIconInfo(hIcon,&iconinfo);
hBitmap=iconinfo.hbmMask; ::GetObject(hBitmap,sizeof(bm),&bm); if(lpDrawItemStruct->itemState&ODS_SELECTED)
{
rectIcon.OffsetRect(1,1);
}
DrawIconEx(pDc->GetSafeHdc(),rectIcon.left,rectIcon.top,
GetIcon(),bm.bmWidth,bm.bmHeight,NULL,
(HBRUSH)NULL,DI_NORMAL);
} if(lpDrawItemStruct->itemState&ODS_SELECTED)
{
pDc->DrawFocusRect(m_rectFocus);
m_blnFocus=true;
}
else
{
m_blnFocus=false;
}
pDc->GetTextMetrics(&textMetric); this->GetWindowText(m_strCaption);
//设置字体部分的背景透明
pDc->SetBkMode(TRANSPARENT); pDc->TextOut((m_rectClient.Width()-m_strCaption.GetLength())/2-2*bm.bmWidth/3,
(m_rectClient.Height()-textMetric.tmHeight)/2,m_strCaption);
ReleaseDC(pDc);
}void FlatB::OnMouseMove(UINT nFlags, CPoint point) 
{
// TODO: Add your message handler code here and/or call default
HICON hIcon;
ICONINFO iconinfo;
BITMAP bm;
HBITMAP hBitmap; TEXTMETRIC textMetric; CRect rectWindow;
GetWindowRect(rectWindow);
CPoint ptCursor;
GetCursorPos(&ptCursor); if(!rectWindow.PtInRect(ptCursor))
{
CButton::OnMouseMove(nFlags, point);
return;
} if(m_blnRaised==false)
{
SetTimer(1,10,NULL);
CDC *pDc=GetDC(); pDc->FillSolidRect(m_rectClient,::GetSysColor(COLOR_BTNFACE)); hIcon=GetIcon();
if(hIcon)
{
CRect rectIcon;
rectIcon.CopyRect(m_rectClient);
rectIcon.DeflateRect(2,2,2,2);//区域略小于客户区 GetIconInfo(hIcon,&iconinfo);
hBitmap=iconinfo.hbmMask;//获取图标中的位图句柄 ::GetObject(hBitmap,sizeof(bm),&bm);//获取位图信息
DrawIconEx(pDc->GetSafeHdc(),rectIcon.left,rectIcon.top,GetIcon(),bm.bmWidth,
bm.bmHeight,NULL,(HBRUSH)NULL,DI_NORMAL);
} //画3D框
pDc->Draw3dRect(m_rectClient,::GetSysColor(COLOR_BTNHIGHLIGHT),::GetSysColor(COLOR_BTNSHADOW));
if(m_blnFocus)
{
pDc->DrawFocusRect(m_rectFocus);
}
m_blnRaised=true; pDc->GetTextMetrics(&textMetric); this->GetWindowText(m_strCaption);
//设置字体部分的背景透明
pDc->SetBkMode(TRANSPARENT); pDc->TextOut((m_rectClient.Width()-m_strCaption.GetLength())/2-2*bm.bmWidth/3,
(m_rectClient.Height()-textMetric.tmHeight)/2,m_strCaption);
ReleaseDC(pDc);
}
CButton::OnMouseMove(nFlags, point);
}void FlatB::OnLButtonUp(UINT nFlags, CPoint point) 
{
// TODO: Add your message handler code here and/or call default
m_blnRaised=false; //当鼠标抬起时，设置突起框标志为false
CButton::OnLButtonUp(nFlags, point);
}void FlatB::OnTimer(UINT nIDEvent) 
{
// TODO: Add your message handler code here and/or call default
CRect rectwindow;
GetWindowRect(rectwindow);
CPoint ptCursor;
GetCursorPos(&ptCursor); if(!rectwindow.PtInRect(ptCursor))
{
CButton::OnTimer(nIDEvent);
KillTimer(nIDEvent);
InvalidateRect(NULL);
m_blnRaised=false;
return;
}
CButton::OnTimer(nIDEvent);
}

Answer 3

上面一个是.h，另一个是.cpp使用的时候
OnInitDialog()：
……
CRect btnRect(10,100,160,142);
m_btnTry.Create("Just For a Try",WS_VISIBLE|WS_CHILD|BS_OWNERDRAW|BS_ICON|BS_LEFT,
btnRect,this,IDC_btnTRY);
m_btnTry.SetIcon(AfxGetApp()->LoadIcon(IDI_ICON_TRY));
…….h文件中定义
FlatB m_btnTry;