Is there a way to capture "drag" events once an object has been
"grabbed" with the "grab" command?
I know that by setting the dragData I can initiate a dragDrop, and
then capture events like "dragEnter". But in that case the user is
just dragging a cursor around. If we're actually dragging a control,
it seems that the only message sent is mouseMove.
If, for example, I want to highlight the "object-that-will-be-dropped-
on-if-the-mouse-is-released now," that would seem to require checking
the rect of all possible objects on every nudge of the mouse--
particularly onerous if the possible objects are numerous and their
locations are changeable.
Is there a more efficient solution? (I notice in the message watcher
that when an object is grabbed, a dragStart message is sent; but I
don't detect anything like dragEnter during the course of dragging
the grabbed object).
Many thanks.
David Epstein
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