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MemDC.cpp
Package: ProgressCtrl.rar [view]
Upload User: cn05999
Upload Date: 2020-06-29
Package Size: 84k
Code Size: 1k
Category:
Static control
Development Platform:
Visual C++
- // MemDC.cpp: implementation of the CMemDC class.
- //
- //////////////////////////////////////////////////////////////////////
- #include "stdafx.h"
- #include "CProgressCtrl.h"
- #include "MemDC.h"
- #ifdef _DEBUG
- #undef THIS_FILE
- static char THIS_FILE[]=__FILE__;
- #define new DEBUG_NEW
- #endif
- //////////////////////////////////////////////////////////////////////
- // Construction/Destruction
- //////////////////////////////////////////////////////////////////////
- CMemDC::CMemDC(CDC* pDC):CDC()
- {
- ASSERT(pDC!=NULL);
- m_pDC=pDC;
- m_pOldBitmap=NULL;
- m_bMemDC=!pDC->IsPrinting();
- //
- if(m_bMemDC)
- {
- pDC->GetClipBox(&m_rect);
- CreateCompatibleDC(pDC);
- m_bitmap.CreateCompatibleBitmap(pDC,m_rect.Width(),m_rect.Height());
- m_pOldBitmap=SelectObject(&m_bitmap);
- SetWindowOrg(m_rect.left,m_rect.top);
- }
- else //为相关的现有设备准备打印
- {
- m_bPrinting=pDC->m_bPrinting;
- m_hDC=pDC->m_hDC;
- m_hAttribDC=pDC->m_hAttribDC;
- }
- }
- CMemDC::~CMemDC()
- {
- if(m_bMemDC)
- {
- m_pDC->BitBlt(m_rect.left,m_rect.top,m_rect.Width(),m_rect.Height(),
- this,m_rect.left,m_rect.top,SRCCOPY);
- SelectObject(m_pOldBitmap);
- }
- else
- {
- m_hDC=m_hAttribDC=NULL;
- }
- }
- // CMemDC* operator->(){return this;}
- // operator CMemDC*(){return this;}