Search:

I suspect the DnD code is eating the mouse release. Perhaps the DnD/transfer code has a way to determine the target component.

The posted code does not compile. It's missing some class definitions.

A small program that compiles, executes and show the problem.

If you get a mouse pressed event, I'd expect you'd get the matching mouse released event.

Can you make a small testing program that compiles, executes and show the problem?

Is another method "eating" the release? The drag and drop methods would use the release to know when the drop has happened.

That looks like it should work. Can you make a small complete program that compiles, executes and shows the problem?