Partial quick redraw of some QwtPlot elements

[nayaga]

Is there an alternative to the replot() method of the QwtPlot class? It is necessary to draw some elements located on QwtPlot (for example, QwtPlotMarker, which I move by 1 pixel when I click on the QPushButton), redrawing the entire QwtPlot space using the replot() method takes a lot of resources, which is why even one marker moves with slight jerks.

I’m inclined to look towards partial redrawing, I discovered the QwtWidgetOverlay class, but I don’t really understand how to use it (you need to override the drawOverlay() and maskHint() methods, and what’s next is not clear)

[Uwe]

Have a look at the itemeditor example.