Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uwm.edu!ux1.cso.uiuc.edu!jason
From: jason@ux1.cso.uiuc.edu (Jason)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Dialogs vs Windows
Message-ID: <1990Sep6.171353.12996@ux1.cso.uiuc.edu>
Date: 6 Sep 90 17:13:53 GMT
References: <1259@meaddata.mead.UUCP>
Organization: University of Illinois at Urbana
Lines: 32

rubin@mead.UUCP (Daniel Rubin) writes:

>Are the opening and closing of Dialogs victimized by memory fragmentation
>like the opening and closing of Windows are ????

   Yes, dialogs are windows (windows with some additional data appended to
the root window structure/record).

>In other words...  Will I run in to memory fragmentation proglems if I
>open one main window and through out the course of the program execution
>there are many many dialogs ????

   Perhaps.  If you have a program which uses various windows/dialogs at
varying times, one of the best methods is to allocate the windows and
dialogs just after the other standard initializations:

	1) maximize the application's zone
	2) use MoreMasters() to allocate the number of master pointers needed
	3) initialize the Toolbox
      * 4) use NewWindow(), NewDialog(), etc. to create the as many windows
	   as you need.
	5) (Forgive me if I have left anything out).

   In the case of a modal dialog, memory fragmentation is not such a big concern
since the dialog can be disposed of as soon as the user sends it away.  Here
the concern would simply be memory availability at the time the dialog needs
to be created.
-- 

                       |  |    |====================|
                       |  |    | Jason Watts        |
                     \ |\ |\ \ | (jazzin@uiuc.edu)  |