Dear MITK Developers,

I would like to create a graph-cut based interactive segmentation using
MITK.
Currently, I can use the PointSetInteractor to add foreground and background
seeds.
But adding the seeds through mouse-clicking is quite slow.
Thus, I would like to be able to add seeds through something like
paint-brushes.

Unfortunately, there doesn't seem to exist a  "ContourSetInteractor" or sth
similar in MITK right now that allows me to
do paint-brushes or mouse-strokes. I tried to start with the
"ContourInteractor" but the program always crashes
(for example,  I replaced the PointSetInteractor in the QMITKRegionGrowing
with ContourInteractor, and the program first complains that the
StateMachine for ContourInteractor is not initialized, and then it crashes
whenever I shift-click the mouse).

I would appreciate it very much if someone can offer me some suggestions
about how to design such a  "paint-brush" interactor.
Or is there any code in MITK I should look as examples?

Thanks very much!

Xiao
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