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#pragma once
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class CakMemDC : public CDC
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{
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public:
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CakMemDC(CDC* pDC, CRect rectDC) : CDC()
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{
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ASSERT(pDC != NULL);
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m_pDC = pDC;
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m_pOldBitmap = NULL;
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m_bMemDC = false;
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m_hDC = NULL;
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if(pDC == NULL)
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{
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CreateCompatibleDC(pDC);
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return;
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}
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#ifndef WCE_NO_PRINTING
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m_bMemDC = !pDC->IsPrinting();
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#else
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m_bMemDC = FALSE;
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#endif
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if (m_bMemDC)
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{
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//pDC->GetClipBox(&m_rect);
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m_rect = rectDC;
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CreateCompatibleDC(pDC);
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m_bitmap.CreateCompatibleBitmap(pDC, m_rect.Width(), m_rect.Height());
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m_pOldBitmap = SelectObject(&m_bitmap);
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#ifndef _WIN32_WCE
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//SetWindowOrg(m_rect.left, m_rect.top);
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SetWindowOrg(0,0);
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#endif
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FillSolidRect(m_rect, pDC->GetBkColor());
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}
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else
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{
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#ifndef WCE_NO_PRINTING
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m_bPrinting = pDC->m_bPrinting;
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#endif
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m_hDC = pDC->m_hDC;
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m_hAttribDC = pDC->m_hAttribDC;
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}
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}
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virtual ~CakMemDC()
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{
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if (m_bMemDC)
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{
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m_pDC->BitBlt(m_rect.left, m_rect.top, m_rect.right, m_rect.bottom,
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this, m_rect.left, m_rect.top, SRCCOPY);
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SelectObject(m_pOldBitmap);
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//DeleteDC();
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//m_bitmap.DeleteObject();
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}
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else
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{
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m_hDC = m_hAttribDC = NULL;
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}
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}
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CakMemDC* operator->()
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{
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return this;
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}
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operator CakMemDC*()
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{
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return this;
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}
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private:
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CBitmap m_bitmap; // Offscreen bitmap
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CBitmap* m_pOldBitmap; // bitmap originally found in CakMemDC
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CDC* m_pDC; // Saves CDC passed in constructor
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BOOL m_bMemDC; // TRUE if CDC really is a Memory DC.
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public:
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CRect m_rect; // Rectangle of drawing area.
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}
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;
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