myeditctrl.cpp

在VC6.0中实现了对editbox控件中使用背景位图 本程序已成功测试通过,具有可靠性,可行性. 也是初学者的好实例.

// MyEditCtrl.cpp : implementation file
//

#include "stdafx.h"
#include "myedit.h"
#include "MyEditCtrl.h"

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

/////////////////////////////////////////////////////////////////////////////
// CMyEditCtrl

CMyEditCtrl::CMyEditCtrl()
{
	m_brHollow.CreateStockObject(HOLLOW_BRUSH);	
}

CMyEditCtrl::~CMyEditCtrl()
{
}


BEGIN_MESSAGE_MAP(CMyEditCtrl, CEdit)
	//{{AFX_MSG_MAP(CMyEditCtrl)
	ON_WM_CTLCOLOR_REFLECT()
	ON_WM_LBUTTONUP()
	ON_CONTROL_REFLECT(EN_CHANGE, OnChange)
	//}}AFX_MSG_MAP
	ON_WM_ERASEBKGND()
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMyEditCtrl message handlers

HBRUSH CMyEditCtrl::CtlColor(CDC* pDC, UINT nCtlColor) 
{
	pDC->SetBkMode(TRANSPARENT);
	pDC->SetTextColor(RGB(0xff,0xff,0xff));
	return m_brHollow;
}

void CMyEditCtrl::OnLButtonUp(UINT nFlags, CPoint point) 
{
	Invalidate();
	CEdit::OnLButtonUp(nFlags, point);
}

void CMyEditCtrl::OnChange() 
{
	Invalidate();
}

BOOL CMyEditCtrl::OnEraseBkgnd(CDC* pDC) 
{
	BITMAP bm;
	m_bmp.GetBitmap(&bm);
	m_pbmCurrent = &m_bmp;
	CDC dcMem;
	dcMem.CreateCompatibleDC(pDC);
	CBitmap* pOldBitmap = dcMem.SelectObject(m_pbmCurrent);
	pDC->BitBlt(0,0,bm.bmWidth,bm.bmHeight,&dcMem,0,0,SRCCOPY);
	dcMem.SelectObject(pOldBitmap);
    return TRUE; 
}