Path: utzoo!attcan!uunet!wuarchive!brutus.cs.uiuc.edu!apple!coherent!next!aozer
From: aozer@next.com (Ali Ozer)
Newsgroups: comp.sys.next
Subject: Re: transparent windows?
Message-ID: <173@next.com>
Date: 30 May 90 17:02:48 GMT
References: <177@heaven.woodside.ca.us> <1990May25.192737.14598@Neon.Stanford.EDU>
Reply-To: Ali_Ozer@NeXT.com (Ali Ozer)
Organization: NeXT, Inc.
Lines: 17

In article <1990May25.192737.14598@Neon.Stanford.EDU> Glen Diener writes:
>In article <177@heaven.woodside.ca.us> Glenn C. Reid writes:
>>Do any of you have any ideas about how to keep a window from painting
>>its backgroundGray color?
>I spent a lot of time on this, and concluded that there was no easy way to
>do it: windows are opaque, and that's that.  ...
>One thing you can do, however, which will have the same effect (almost)
>is to locate the window directly underneath the current window, then composite
>it, ...

Under certain cases you can use a Nonretained window with autofill
to false; this prevents the exposed areas of the window from being painted.
You can use such a window on screen to copy bits from the screen (by 
compositing).

Ali
Ali_Ozer@NeXT.com