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Using CScrollView

General and Gameplay Programming Programming

Started by pukas November 28, 2005 07:36 AM

-1 comments, last by pukas 18 years, 4 months ago

pukas

130

Author

November 28, 2005 07:36 AM

Hi Everyone! I'm trying to implement a simple imageview using a MFC and CScrollView. Everything works fine until I start to use the scrollbars, after that the only a part of the image is repainted. I could really need some help on this. My OnDraw function


	CDC		DCMem;
	CNCDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);

	
	
	CBitmapDIB *pBitmapDIB = pDoc-&gt;GetActiveBitmap();

	if (pBitmapDIB) {
		

		int		nWidth, nHeight, nBPP, nColors;
		
		HBITMAP hBitmap = pBitmapDIB-&gt;GetDDB (pDC-&gt;GetSafeHdc());
		pBitmapDIB-&gt;GetDimensions (nWidth, nHeight, nBPP, nColors);
		CClientDC DCClient (this);

		CRect Box;
		DCClient.GetClipBox (&Box);
		
		DCMem.CreateCompatibleDC (pDC);
		pDoc-&gt;SelectBitmap (&DCMem, hBitmap);
		
		pDC-&gt;BitBlt(0,0, nWidth, nHeight, &DCMem, Box.TopLeft().x,   Box.TopLeft().y, SRCCOPY);	
		
		pDoc-&gt;SelectOldBitmap (&DCMem);
		DCMem.DeleteDC();
		
		
	}

/Pukas