QwtPlotPicker stay visible after DoubleMouseClick

[DSP]

Hi Uwe,

sorry i didn't get it.

My CurveTracker class is derived from QwtPlotPicker.
Where should i overload the transition function from QwtPickerMachine class?

Do i have to write a own MyPickerMachine class and handle all the stuff there?
Then i could overload the transistion function and could try to catch the double click event.
Who does emit the selected signal?

Thanks for further explanations

[Uwe]

My CurveTracker class is derived from QwtPlotPicker.
Where should i overload the transition function from QwtPickerMachine class?

Inherit from whatever machine your picker is using ( in the curvetracker example it is a QwtPickerDragPointMachine ), extend/configure it by overloading its virtual methods ad then add it with:

yourPicker->setStateMachine( yourStateMachine )

yourPicker->setStateMachine( yourStateMachine )

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Of course you can also write your own state machine from scratch if you prefer that.

Who does emit the selected signal?

Well a picker is for selecting points/rects/polygons ( in your case a point ) and the selected signal emits the result of the selection, what should contain the position, where to insert the marker.

Uwe