newbutton.cpp

透明按钮

// NewButton.cpp : implementation file
//

#include "stdafx.h"
#include "TransButton.h"
#include "NewButton.h"

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

/////////////////////////////////////////////////////////////////////////////
// CNewButton

CNewButton::CNewButton()
{
}

CNewButton::~CNewButton()
{
}


BEGIN_MESSAGE_MAP(CNewButton, CButton)
	//{{AFX_MSG_MAP(CNewButton)
	ON_WM_ERASEBKGND()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CNewButton message handlers

void CNewButton::PreSubclassWindow() 
{
	// TODO: Add your specialized code here and/or call the base class
	SetButtonStyle(GetButtonStyle() | BS_OWNERDRAW);
//	CButton::PreSubclassWindow();
}

void CNewButton::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct) 
{
	// TODO: Add your code to draw the specified item
	Refresh();
}

BOOL CNewButton::OnEraseBkgnd(CDC* pDC) 
{
	// TODO: Add your message handler code here and/or call default
	CRect  clientRect;
	GetClientRect(&clientRect);
	int cx=clientRect.Width ();
	int cy=clientRect.Height ();
	// Store our orignal DC.
	CBitmap	bitmap;
//	memDC.CreateDC(pDC);
	bitmap.CreateCompatibleBitmap (pDC,cx,cy);
	memDC.SelectObject (&bitmap);
	memDC.BitBlt (0,0,cx,cy,pDC,0,0,SRCCOPY);
	//		m_bDCStored=true;
	//	}
	// We'll not erase our button's back ground.
	return TRUE;
}

void CNewButton::Refresh()
{
	CRect	rect;
	GetClientRect(&rect);	
	CClientDC  dc(this);
//	if(m_bBkTransparent==false)
//		dc.FillRect(&rect,&CBrush(::GetSysColor(COLOR_BTNFACE)) );
//	else
		dc.BitBlt (0,0,rect.Width (),rect.Height (),&memDC,0,0,SRCCOPY);
}