how to make the plot display the last curve drawn ??

**jesse_mark** · 27th November 2012, 16:18

using the Auto Scale works great, but there is affects other scales.

Let me elaborate it.

I am using

Qt Code:

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rescaler = new QwtPlotRescaler( myplot->canvas() );
    rescaler->setReferenceAxis( QwtPlot::xBottom );
    rescaler->setAspectRatio( QwtPlot::yLeft, 1.0 );
    rescaler->setAspectRatio( QwtPlot::yRight, 0.0 );
    rescaler->setAspectRatio( QwtPlot::xTop, 0.0 );
    rescaler->setAspectRatio( QwtPlot::xBottom, 1.0 );
    rescaler->setRescalePolicy( QwtPlotRescaler::Fixed );

rescaler = new QwtPlotRescaler( myplot->canvas() );
    rescaler->setReferenceAxis( QwtPlot::xBottom );
    rescaler->setAspectRatio( QwtPlot::yLeft, 1.0 );
    rescaler->setAspectRatio( QwtPlot::yRight, 0.0 );
    rescaler->setAspectRatio( QwtPlot::xTop, 0.0 );
    rescaler->setAspectRatio( QwtPlot::xBottom, 1.0 );
    rescaler->setRescalePolicy( QwtPlotRescaler::Fixed );

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this code to prevent the curve to be stretched and lose its real shape.
but when i use the AutoScale before i replot, the curve get stretched , where i have to zoom in and out so the rescaler works and the curve gets its "unstreached shape".

how can i fix this issue.

Thanks