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From: oster@dewey.soe.berkeley.edu (David Phillip Oster)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Revealing the Mouse Cursor
Message-ID: <32450@ucbvax.BERKELEY.EDU>
Date: 9 Nov 89 09:17:26 GMT
References: <32409@ucbvax.BERKELEY.EDU> <14473@well.UUCP>
Sender: usenet@ucbvax.BERKELEY.EDU
Reply-To: oster@dewey.soe.berkeley.edu.UUCP (David Phillip Oster)
Organization: School of Education, UC-Berkeley
Lines: 28

I was a little too terse in my first posting on this topic. I'll try again
to make the problem clear. 

You are typing at a dialog. The mouse cursor has vanished, as the User
Interface Guidlines inteded, because TextEdit() calls ObscureCursor().
Now, the user hits the <return> key. Since this dialog has a default
action, the dialog vanishes. No text cursor. Also no mouse cursor.

Experienced Mac users unconsciously know that if they move the mouse,
they'll get a cursor. My testers don't come from the Mac culture and say
Bug Report 850:, dialog code 12, code 13, code 14...

SetCursor() doesn't show the cursor. RevealCursor() doesn't show the
cursor. Nothing undoes ObscureCursor() except InitCursor(), which also has
the side effect of making the cursor be the arrow. Those who have
responded to me by mail have assured me that calling InitCursor() more
than once isn't a problem, but I want reassurance from Apple.

Yes, it is a finicky detail, but finicky details are important.  A
little background: This program changes the mouse cursor to an i-beam if
it is over a text edit dialog item, even in SFPutFile(). It provides
cut/copy/paste AND UNDO in every dialog, even SFPutFile(). My testers
have sent me bug reports that I've tracked down to Apple bugs in
TEUpdate(), TEGetOffset(), and PtrAndHand(). (I've filed bug reports on
these with apple over MCI mail.) My testers also filed a bug report
with me that my program didn't tell them that they'd turned off their
imagewriter. (For those who don't know, a turned off imagewriter sends a
continuous "ready" signal to the Mac's serial port.)