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From: daemon@rutgers.UUCP
Newsgroups: comp.sys.amiga
Subject: Window movement between screens
Message-ID: <1273@rutgers.RUTGERS.EDU>
Date: Wed, 25-Mar-87 07:15:18 EST
Article-I.D.: rutgers.1273
Posted: Wed Mar 25 07:15:18 1987
Date-Received: Fri, 27-Mar-87 00:49:24 EST
Sender: daemon@rutgers.RUTGERS.EDU
Lines: 45

From: Richard Conner <bilbo.conner@CS.UCLA.EDU>

Hey all you screen/window experts out there:

Here's a puzzle for you-

I want to move a window from one screen to another.
So I unlink the window from the source screen's linked list
starting off SourceScreen->FirstWindow.  I then proceed
to link it into the destination screen's linked list of windows.
I also point the window's back pointer to its Screen at the
destination screen.  All this sorounded by Forbid()/Permit().

Unfortunately the window doesn't move to the destination screen
(Although parts of it does...really strange...).  It appears as
though I'm not re-arranging enough information somewhere, but I
sure can't think or see what I'm missing.  Code looks something
like the following:

Setup:

	p_prevFromWindow <---- pointer: Previous Window in from Screen
	p_fromWindow     <---- pointer: Window in from Screen
	p_fromScreen     <---- pointer: From Screen
	p_toScreen       <---- pointer: Destination Screen

Code (Basically):

	Forbid();
	p_fromScreen->FirstWindow = p_fromScreen->FirstWindow->NextWindow;
	p_prevFromWindow->NextWindow = p_fromWindow->NextWindow;
	p_fromWindow->NextWindow = p_toScreen->FirstWindow;
	p_toScreen->FirstWindow = p_fromWindow;
	p_fromWindow->WScreen = p_toScreen;
	Permit();

Any and all suggestions/solutions welcome!

Thanx,

Richard Conner
Locus Computing Corporation		       lcc.richard@LOCUS.UCLA.EDU
					       lcc.richard@UCLA-CS
				 {ihnp4,trwrb}!lcc!richard
       {randvax,sdcrdcf,ucbvax,trwspp}!ucla-cs!lcc!richard