Using scroll bars with QwtPlotMagnifier

**penny** · 24th December 2010, 05:35

We have used QwtPlotMagnifier to zooming in and zooming out of a QwtPlot. Can someone please tell us how to integrate scroll bars with QwtPlotMagnifier, so that when zoomed in, we can scroll the plot

**Uwe** · 24th December 2010, 11:25

This is something you have to implement yourself.

Guess you can adopt the ScrollZoomer class ( derive it from QwtPlotMagnifier instead of QwzPlotZoomer ) from the realtime example.

Uwe

**penny** · 29th December 2010, 05:40

But most of the methods used in scrollzoomer are inherited from QwtPlotZoomer and hence not recognized when QwtPlotZoomer is changed to QwtPlotMagnifier...

**Uwe** · 1st January 2011, 16:00

Its about connecting a QAbstractSlider or QwtAbstractSlider to QwtPlot::setAxisScale. The ScrollZoomer is only one of many possible combinations.

Uwe