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From: brian@ut-sally.UUCP
Newsgroups: comp.sys.mac
Subject: Finding out if there are no windows on the screen
Message-ID: <8259@ut-sally.UUCP>
Date: Sun, 14-Jun-87 19:24:28 EDT
Article-I.D.: ut-sally.8259
Posted: Sun Jun 14 19:24:28 1987
Date-Received: Mon, 15-Jun-87 05:38:32 EDT
Organization: U. Texas CS Dept., Austin, Texas
Lines: 28
Keywords: Mac Programming Question


     Motivation:  I'm writing a program that can have several windows and desk
accessories on the screen.  When there are no windows or DAs on the screen, I
want the Close item in the File menu to be dimmed.

     The first thought is that it's easy.  As you process the Close menu item,
you just check to see if there are any windows left and if not, dim the menu
item.  But suppose the only window on the screen is a DA.  If the user clicks
the close box, the DA goes away, but the application is not informed.  So here
you are, left with an empty screen and an enabled Close item.

     The brute force method is to build the menu each time the user clicks in
the menu bar.

     Is there a more elegant solution?  Edit wimps out and never lets you
choose "Close" when a DA is in front.  MacWrite, however, handles it the way I
want to.  Thanks in advance for any help.

Brian H. Powell
		UUCP:	{ihnp4,seismo,ctvax}!ut-sally!brian
		ARPA:	brian@sally.UTEXAS.EDU

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