QwtPlotCurve setZ() removes old LegendLabel and adds a new one

[solove]

Hello,

so i have an application where a lot of curves can be on the plot at one time. I have written a method that lets me select one of these curves by clicking on it.
To indicate clearly that this line has been selected i set the color of it to red and increase the width.
Now i also want to get this curve to be drawn on top of all the other curves.
To do this i use the setZ() method of QwtPlotCurve and it works just fine.
But my problem is that everytime i use setZ() on a Curve the associated LegendLabel gets removed and a new one gets attached to my Legend and is now deselected and not in the position it was at the beginning.
I need the LegendLabel to stay selected (which is no problem) and also be in the same position.

Is there any way i can avoid that a new LegendLabel gets added or find out the position of the old LegendLabel and put the new LegendLabel in the same position?
The Version im using is 6.1.0

Solove.

[Uwe]

The connection between plot widget and legend is depending on the QwtPlot::legendDataChanged() signal. So you could try something like this:


item->plot()->blockSignals( true );
item->setZ( ... );
item->plot()->blockSignals( false );Uwe

[solove]

Thank you very much. Works exactly like i wanted.

solove