QwtPlotMagnifier Invert Wheel Zoom

[Uwe]

Didn't try it myself, but I guess the following might invert:

virtual YourMagnifier::rescale(double factor)
{
   if ( factor != 0.0 )
       QwtPlotMagnifier::rescale(1 / factor);
}

virtual YourMagnifier::rescale(double factor)
{
   if ( factor != 0.0 )
       QwtPlotMagnifier::rescale(1 / factor);
}

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HTH,
Uwe