Path: utzoo!utgpu!watmath!clyde!att!ucbvax!dewey.soe.berkeley.edu!oster
From: oster@dewey.soe.berkeley.edu (David Phillip Oster)
Newsgroups: comp.sys.mac.programmer
Subject: Re: portBits update in the current GrafPort
Message-ID: <27487@ucbvax.BERKELEY.EDU>
Date: 12 Jan 89 00:12:46 GMT
References: <8186@orstcs.CS.ORST.EDU>
Sender: usenet@ucbvax.BERKELEY.EDU
Reply-To: oster@dewey.soe.berkeley.edu.UUCP (David Phillip Oster)
Organization: School of Education, UC-Berkeley
Lines: 15

In article <8186@orstcs.CS.ORST.EDU> borcelf@jacobs.cs.orst.edu (Fernando Borcel) writes:
...
>   BeginUpdate(tempwindow);
	SetPort(tempwindow);
>   EraseRect(theport^.portrect);
...

Well, one error is that BeginUpdate modifies the visRgn of its argument
temporarily (EndUpdate puts it back.), but it doesn't make it the current
port.  You must do that explicitly.  It is wise to save the old port so
you can restore it.

--- David Phillip Oster            --"When we replace the mouse with a pen,
Arpa: oster@dewey.soe.berkeley.edu --3 button mouse fans will need saxophone
Uucp: {uwvax,decvax}!ucbvax!oster%dewey.soe.berkeley.edu --lessons." - Gasee