Hoe to implement a listener that deletes its calling object?
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I would like to trigger DELETE of an IMAGES.ROI object upon ROIMoved event.
I am trying:
figure(1);clf;axis([0 100 0 100])
h = images.roi.Rectangle(gca,'position',uint16([10 20 10 20]));
when the rectangle is moved it gets deleted (as desired) but it also issues an error:
Error using images.roi.Rectangle/MarkDirty
Value must be a handle.
Error in images.roi.internal.ROI/stopDrag
Error in images.roi.internal.ROI
What would be the right way for a listener to delete its object without invoking an error?
Walter Roberson am 12 Jul. 2020
Bearbeitet: Walter Roberson am 12 Jul. 2020
The right way would probably be not to do that at all.
Instead, put in a position constraint that prevents the ROI from moving and use a different method to delete the ROI if it must be deleted. In particular, do not delete the ROI from within a listener to the ROI (but you could delete the ROI from within a listener to mouse presses or key presses.)