Path: utzoo!utgpu!water!watmath!clyde!rutgers!ucla-cs!zen!ucbvax!Xerox.COM!"Michael_K._Powers.WBST139"
From: "Michael_K._Powers.WBST139"@Xerox.COM
Newsgroups: comp.windows.x
Subject: GrabPointer again
Message-ID: <880107-095710-7037@Xerox>
Date: 7 Jan 88 17:56:13 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
Lines: 34

That clears up some of my questions about the grabbing the pointer but I am
still unclear at how to approach what my application requires.

Perhaps a better example:

I have a window(A) that is 640x350 mapped to root. I have another window(B)
which is a child of A and is also 640x350. It is mapped to A and covers it. B
Contains mutiple windows that represent checkbox buttons, text, etc. All the
windows are set to no_propagate for all events. The reason for this is that we
don't want a button press on a checkbox button, even if it doesn't care about
it, to fall through to a button it occludes. 

So this is the basic setup. Now I want to temporarily ask for a button down
event anywhere on the area defined by window A ignoring any siblings request for
said event. Once I get the button down (I want to ignore the release) I wish to
take that point and use it for the stake point of a rubberbanding line. I then
wish to grab, for the area defined by A, all motion and button down events. The
track point of the line will follow the pointer. Then when another button down
is recieved the rubber line is done and things, event-wise, should return to the
way they were before the first down event. 

A question at this point. Why should this require me to grab the device for the
entire display? Basically what I have here is a microcosm display that doesn't
really want to stop the user from moving to another client application window
just because it wants to rubberband a line. (or bring up a menu) GrabButton does
more of what I need except that it assumes you want to grab the pointer
inbetween a down and up event.

Am I using the propagate wrong? Is this style of real-estate tracking "not
recommended"? 

				 -mike

powers.wbst139@Xerox.com