Prevent dragging of a 'dropped' object?
I have created a drag and drop interaction on a slide layer.
The state of the drop target changes to Drop Correct or Drop Incorrect when the object is dropped - all ok so far...
How do I prevent the user from re-dragging the object from the drop zone, once they have dropped it? Also, how can I prevent another object being dropped on top of the one already dropped?
I have tried placing a transparent button over the drop zone which switches from Hidden to Normal, but the dropped object appears to be on a layer above the top layer of the slide.
Any ideas please?