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From: wca@ut-ngp.UUCP (William C. Anderson)
Newsgroups: net.micro.mac
Subject: Re: TransSkel1.0 Bug (horrors!) + Fix
Message-ID: <3892@ut-ngp.UUCP>
Date: Wed, 27-Aug-86 20:27:07 EDT
Article-I.D.: ut-ngp.3892
Posted: Wed Aug 27 20:27:07 1986
Date-Received: Thu, 28-Aug-86 01:33:28 EDT
References: <212@uwmacc.UUCP>
Distribution: net
Organization: UTexas Computation Center, Austin, Texas
Lines: 26
Summary: TransSkel DuBois Cudos Flashing ScrollBars

In article <212@uwmacc.UUCP>, dubois@uwmacc.UUCP (Paul DuBois) writes:
> 
> There's a bug in the window growing code of TransSkel (DoGrow) - after
> a window is grown, the entire port is invalidated, which causes an
> update event to be generated for the window.  The host is then notified
> that the window was resized.  Fortuitously, due to the way TransSkel
> operates, the current port is virtually always set to the window that
> is resized.  Under certain circumstances, however, it won't be, and a
> bomb occurs.  The fix is to set the port before invalidating it.  This
> also explains what (to me, anyway) was an otherwise inexplicable
> phenomenon in DoActivate.
> 
> <the patch itself>

I hope that this explains why my scrollbars were flashing _twice_ when I
expose a window! :-)  

By the way, I think that TransSkel is a *wonderful* piece of code!  It has
simplified my Mac programming greatly and it motivated me to buy LightSpeed
C (a decision that I will never regret).  TransSkel is for the Mac what
SunView is for Sun Workstations - a much simpler way to utilize the inter-
face from the programmer's point of view.

Thanks for TransSkel, Paul.

William Anderson - University of Texas Computation Center