RE: how to test whether region is active during a mouse event?

[Drew Adams]

> > I want to be able to check whether the region is active 
> > during the overall button-click action.
> 
> I don't know what that means.  Could you describe it more precisely?

Please see the rest of the thread. See in particular David DLH's first post, on
2009-08-02.

Summary: David DLH explained the cause of the problem. He suggested a possible
workaround. I decided anyway to abandon my attempt to distinguish whether the
region is active when the mouse is clicked (either `down' or `click' modifier -
both had problems).