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Thread: Qt 4.3.0 clipping problem?

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  1. 13th June 2007, 10:53 #5
    magland
    magland is offline Intermediate user
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    Default Re: Qt 4.3.0 clipping problem?

    I would be interested to see the output if you tried the following in place of what you have already tried:

    Qt Code: 
    1. QRectF myRect,clipRect;
    2. myRect=( 100, -100, width-200, -(height-200) );
    3. cout << "myRect: left: " << myRect.left() << " right: " << myRect.x() + myRect.width() << " top: " << myRect.top() << " bottom: " << myRect.y() + myRect.height() << endl;
    4. myPainter.setClipRect(myRect, Qt::ReplaceClip);
    5. clipRect = myPainter.clipRegion().boundingRect();
    6. cout << "clipRect: left: " << clipRect.left() << " right: " << clipRect.x() + clipRect.width() << " top: " << clipRect.top() << " bottom: " << clipRect.y() + clipRect.height() << endl;
    7.  
    8. myRect=( 100.001, -100, width-200, -(height-200) );
    9. cout << "myRect: left: " << myRect.left() << " right: " << myRect.x() + myRect.width() << " top: " << myRect.top() << " bottom: " << myRect.y() + myRect.height() << endl;
    10. myPainter.setClipRect(myRect, Qt::ReplaceClip);
    11. clipRect = myPainter.clipRegion().boundingRect();
    12. cout << "clipRect: left: " << clipRect.left() << " right: " << clipRect.x() + clipRect.width() << " top: " << clipRect.top() << " bottom: " << clipRect.y() + clipRect.height() << endl;
    13.  
    14. myRect=( 99, -100, width-200, -(height-200) );
    15. cout << "myRect: left: " << myRect.left() << " right: " << myRect.x() + myRect.width() << " top: " << myRect.top() << " bottom: " << myRect.y() + myRect.height() << endl;
    16. myPainter.setClipRect(myRect, Qt::ReplaceClip);
    17. clipRect = myPainter.clipRegion().boundingRect();
    18. cout << "clipRect: left: " << clipRect.left() << " right: " << clipRect.x() + clipRect.width() << " top: " << clipRect.top() << " bottom: " << clipRect.y() + clipRect.height() << endl;
    19.  
    20. myRect=( 100, -100-(height-200), width-200, +(height-200) );
    21. cout << "myRect: left: " << myRect.left() << " right: " << myRect.x() + myRect.width() << " top: " << myRect.top() << " bottom: " << myRect.y() + myRect.height() << endl;
    22. myPainter.setClipRect(myRect, Qt::ReplaceClip);
    23. clipRect = myPainter.clipRegion().boundingRect();
    24. cout << "clipRect: left: " << clipRect.left() << " right: " << clipRect.x() + clipRect.width() << " top: " << clipRect.top() << " bottom: " << clipRect.y() + clipRect.height() << endl;
    25.  
    26. myRect=( 100.001, -100-(height-200), width-200, +(height-200) );
    27. cout << "myRect: left: " << myRect.left() << " right: " << myRect.x() + myRect.width() << " top: " << myRect.top() << " bottom: " << myRect.y() + myRect.height() << endl;
    28. myPainter.setClipRect(myRect, Qt::ReplaceClip);
    29. clipRect = myPainter.clipRegion().boundingRect();
    30. cout << "clipRect: left: " << clipRect.left() << " right: " << clipRect.x() + clipRect.width() << " top: " << clipRect.top() << " bottom: " << clipRect.y() + clipRect.height() << endl;
    31.  
    32.  
    33. myRect=( 99, -100-(height-200), width-200, +(height-200) );
    34. cout << "myRect: left: " << myRect.left() << " right: " << myRect.x() + myRect.width() << " top: " << myRect.top() << " bottom: " << myRect.y() + myRect.height() << endl;
    35. myPainter.setClipRect(myRect, Qt::ReplaceClip);
    36. clipRect = myPainter.clipRegion().boundingRect();
    37. cout << "clipRect: left: " << clipRect.left() << " right: " << clipRect.x() + clipRect.width() << " top: " << clipRect.top() << " bottom: " << clipRect.y() + clipRect.height() << endl;
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    ... perhaps it has something to do with the negative height???
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  2. The following user says thank you to magland for this useful post:

    macbeth (13th June 2007)
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