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From: dgold@apple.UUCP (David Goldsmith)
Newsgroups: comp.sys.mac
Subject: Re: VBL tasks, offscreen bitmaps, Lightspeed Pascal, etc.
Message-ID: <738@apple.UUCP>
Date: Fri, 8-May-87 19:29:16 EDT
Article-I.D.: apple.738
Posted: Fri May  8 19:29:16 1987
Date-Received: Sun, 10-May-87 00:55:09 EDT
References: <18736@ucbvax.BERKELEY.EDU> <971@randvax.UUCP>
Reply-To: dgold@apple.UUCP (David Goldsmith)
Organization: Apple Computer Inc., Cupertino, USA
Lines: 25

In article <971@randvax.UUCP> florman@randvax.UUCP (Bruce Florman) writes:
>jmm@miro.Berkeley.EDU (James Moore) writes:
>>1.  How does one get mBarHeight from Lightspeed Pascal?
>
>    According to Inside Mac, p I-341, "The menu bar is white, 20 pixels
>high, and as wide as the screen, with a 1-pixel black lower border.  The
>menu titles in it are always in the system font and the system font size."
>So it sounds like you can just declare a constant.
This actually isn't a good idea; after Inside Macintosh (vol. I-III) were
published, changes to the system software were made such that the menu bar
height is no longer a constant (this is also the case on the Radius FPD).
The best way to get MBarHeight is to declare a type pInt = ^INTEGER, then
cast the constant address of MBarHeight ($BAA - only on 128K ROMs - assume
"20" if not on 128K ROMs) to type pInt and dereference it.  In MPW Pascal,
this would be:  theHeight := pInt($BAA)^; in other Pascals you may have
to use intermediate variables.
-- 
David Goldsmith
Apple Computer, Inc.
MacApp Group

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