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#1 Posted : Friday, April 7, 2006 5:38:16 AM(UTC)

cjsk8  
cjsk8

Groups: Registered
Posts: 4


How can I get the correct pixel color in an zoomed image? For example an 110% zoom percent image in my LBitmapWindow.

 

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#2 Posted : Tuesday, April 11, 2006 4:44:32 AM(UTC)

Amin  
Amin

Groups: Manager, Tech Support
Posts: 353


Using the LEADTOOLS C++ Classlib, to convert from mouse coordinates to
bitmap coordinates, use the following code (for example in the LButtonUp handler):
OnLButtonUp(UINT nFlags, CPoint point)
{
   POINT    pt, bitmapPoint;
   RECT rcDst;

   pt = point;

   m_LBitmapWnd.GetRects(NULL, NULL, &rcDst, NULL);

   bitmapPoint.x = (pt.x - rcDst.left);
   bitmapPoint.y = (pt.y - rcDst.top);

   bitmapPoint.x = (long)(bitmapPoint.x * 100 / m_LBitmapWnd.GetZoomPercent());
   bitmapPoint.y = (long)(bitmapPoint.y * 100 / m_LBitmapWnd.GetZoomPercent());
}

Amin Dodin

Senior Support Engineer
LEAD Technologies, Inc.
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