AxisAutoScale is not working

[Uwe]

When I uncomment the line
//ui.qwtPlot->setAxisScale(QwtPlot::yLeft, -1000, 1000);
I can see how the scale changes ...

Sure, setting an scale range explicitly disables autoscaling - you can't have both.

Simply read the docs,
Uwe

[P@u1]

I only added the line after I recognized that autoscale did not work to test if it works if i do it manually.
With "uncomment" i meant removing the "//"
With the line commented out it does no autoscale for me.

My suggestion that autoscale just doesent work with setRawSamples was wrong?

Please help :-)

[P@u1]

I added the line

curve_.setRawSamples(xData_, yData_, dataSize_);

curve_.setRawSamples(xData_, yData_, dataSize_);

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in the timerEvent and now its working.
I didn't know that I need to set the samples again each time I apply changes to the data...

[Uwe]

Autoscaling uses the coordinates of the bounding rectangle. The bounding rectangle of the data is internally cached and when you update the samples behind the back of the data object the cached bounding rectangle gets wrong.

Uwe