Drag and Drop Rejection Behavior

I have two types of drag sources, say, Balls and Boxes, and I have two targets, Ball Container, Box Container.

What I would like to see, is when a Ball is dragged to the Box Container, it’s rejected and sent back to its original position. Likewise with the Boxes dragged to the Ball Container.

This signals that obviously, the other target is the correct one and the user could then drag to that.

I’ve tried various configurations and can’t seem to get this to work as I envision.

The actual slide would probably consist of a dozen or more text objects that need to be dragged to the correct target. I’d like the user to be able to rapidly go through the text items and make the easy correction as they go.

Any advice is most appreciated.



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