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From: laughlin@fornax.UUCP (Bob Laughlin)
Newsgroups: comp.sys.next
Subject: programming question: Views and Mouse Events
Message-ID: <2229@fornax.UUCP>
Date: 4 Mar 91 22:58:42 GMT
Distribution: na
Organization: School of Computing Science, Simon Fraser University
Lines: 29


     Mail to next-prog@cpac.washington.edu bounces otherwise I would 
have sent this there.

     I have a View subclass that fills part of a window. I would like the
View's mouseDown: method to be called when the window first becomes
activated with a mouse click (assuming the mouse click was also in the View).
How do I do this?  Right now the first mouse click is trapped by the window
to activate itself and never gets passed onto the subview. 

     I also have a matrix of sliders that continuously sends action 
messages as a slider is moved. In addition to this, I would like to
know when the last message comes in, i.e. the user has released the
mouse button. A test for whether the mouse button is currently down
in the window that the matrix is in would do as well. How can I get
this information?

    A related question: Under 1.0 this matrix of sliders would track
mouse drags over different sliders. Under 2.0 the same matrix
(created in IB) only tracks the slider that was initially activated
on the mouseDown:. If you drag the mouse over a different slider
it does not get activated. Has this been disabled in 2.0 or is it
just a different default?

    A quick look at the online Class docs did not answer these questions
for me although I'm sure they're there. Has anybody received the
2.0 technical manuals?
-- 
 Bob Laughlin  laughlin@cs.sfu.ca