QwtPlotPicker

[carhun]

Hello.

How I can show on each QwtPlot own QwtPLotPicker (VLine)?

QwtPlotMarker is bad because for display him I need to do replot() , and there is no effectively because I have a lot of solid curves that hard to always replot...

So I need that one VLine was in all plots at pos.x() and when I move mouse left/rifgt VLine's in all plot will move too.

What I can do to do this?

[Spitfire]

Search through the forum.
It was discussed here many times, for example here (http://www.qtcentre.org/threads/50478-Markers-and-their-fast-display-on-plot) or here (http://www.qtcentre.org/threads/45488-Speed-of-Qwt-plotting-slows-with-many-points).