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Thread: QwtPlotZoomer zooming off the plot canvas

  1. #1
    Join Date
    Jun 2011
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    Default QwtPlotZoomer zooming off the plot canvas

    I am using QwtPlotZoomer with a few graphs in my application but I am having a few problems. I do not want to allow the user to zoom off of the original canvas that is shown with the Plot on it, ie; zooming in to negatives.

  2. #2
    Join Date
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    Default Re: QwtPlotZoomer zooming off the plot canvas

    Qt Code:
    1. class YourZoomer: public QwtPlotZoomer
    2. {
    3. ....
    4.  
    5. virtual void zoom( const QRectF &rect )
    6. {
    7. QwtPlotZoomer::zoom( rect & zoomBase() );
    8. }
    9. };
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    Uwe

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