So I found out about Python variables just being pointers so I guess the
problem lies in the line:
copyROI = self._ROI #make copy of user-draggable ROI
However copy.copy or copy.deepcopy throws a bunch of errors that I don't
quiet understand (I guess an instance of a class cannot be copied with all
the arguments being real copies as well).
So I resorted to generating new ROIs from the ground up which I tried to
circumvent in the first place. Now new problems arise...Here's a code
snippet:
if self.ROI_comboBox.currentText()=="Rectangle":
copyROI = pg.RectROI([self._ROIXPos, self._ROIYPos], [self._ROISizeX, self.
_ROISizeY],
pen=pg.mkPen(color=self._ROIList_PenItems[index],width=1),
removable=True)
elif self.ROI_comboBox.currentText()=="Circle":
copyROI = pg.CircleROI([self._ROIXPos, self._ROIYPos], [self._ROISizeX,
self._ROISizeY],pen=pg.mkPen(color=self._ROIList_PenItems[index],width=1),
removable=True)
copyROI.setZValue(100) # make sure ROI is drawn above image
copyROI.translatable = False
handle = copyROI.getHandles()
!!!!!! copyROI.removeHandle(handle[0]) #this line throws an error that
NoneType doesn't have a method removeItem
handle[0].disconnectROI(copyROI)
print("Get handles: ",copyROI.getHandles())
print("Handle[0]: ",handle[0])
print("type(copyROI): ",type(copyROI))
self._P1.addItem(copyROI)
So basically I create a ROI of type determined by a user selection widget
(rectangle or circle). I can see the automatically created handle object
(when creating a rect ROI) just fine. However when I try to remove it to
effectively disable scaling it throws an error that an object of NoneType
doesn't have a method of removeItem. It's strange because in the snippet I
posted in the first post the method .removeHandle(0) works fine on the
auto-created handle of a rect ROI object. Whats causing this?
I got a dirty workaround now which you can see in the above snippet namely
I disconnect the handle from the ROI of interest. It thus becomes disabled
and scaling becomes impossible. Just what I wanted however the handle is
still visible which I would like to avoid.
Any help is greatly appreciated, Chris
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