Hi everyone!
I use qwt plot in my project showing audio waveform. I need a qwt plot picker now to represent the current playback position. But I dont know how to set the value of a picker because AFAIK it responds to mouse movement or selecting polygons and stuff. All I want is a vertical line representing the current playback position but the QwtPlotMarker is not good for this because it uses replot() and in bigger files there are too many replots. QwtPlotPicker doesnt use replot I think. So this is maybe the solution but I can't find any code to set the picker's value manually and the bode example shows only the mouse movement tracking but I dont need it at all. I want a vertical line on my plot which doesnt use replot!!! please help me! Thanks in advance!