Plot does not refresh

[Uwe]

Depends on the implementation of YourData::copy. If it is implemented as deep copy you have to call curve->setData() after each value change. Otherwise QwtPlot::replot should do what you want. ( QwtPlotItem::itemChanged() has only an effect, for auto-replotting ).

Uwe

[Mat12345]

Hi Uwe,

Thank you for your reply.

My implementation of QwtData::copy is indeed a deep copy.
Even after resetting the Data (QwtPlotCurve::setData), replotting (QwtPlot::replot), detaching and reattaching the QwtPlotCurve, nothing changes, the plot remains the same (the state of my data class is taken account of the first time, but then changing it doesn't yield the replot).

I'll try coding something quickly to show you,

Thanks,
M.