>> Q: Please remind me ... under what circumstances should PickCallBack be >> called? Single click on an atom? > > yes
Q: All the time?
Yes. Regardless of the picking mode (ident, distance, torsion, select, monitor, etc.) a click on an atom always calls pickCallback.
Q: Only when 'set picking' is turned on?
No, see above. It is always on, just the mode changes.
Q: Only the left mouse button?
Yes.
Q: What happens on double-click?
Up to you.
-Eric Martz
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