NetNews Usenet Archive 1992 #27/NN_1992_27.iso/spool/comp/lang/pascal/6809

Internet Message Format | 1992-11-21 | 1.7 KB

Path: sparky!uunet!zaphod.mps.ohio-state.edu!uwm.edu!linac!att!cbnewsk!cbnewsj!att-out!oucsboss!oucsace!tswingle
From: [e-mail] (Tom Swingle)
Newsgroups: comp.lang.pascal,comp.lang.os.msdos.programmer
Subject: Broadcast messages aren't getting through in Turbo Vision--SOLVED!!
Message-ID: <[e-mail]>
Date: 21 Nov 92 20:46:41 GMT
References: <[e-mail]>
Organization: Ohio University CS Dept,. Athens
Lines: 21

With the help of the replies that I received, I have tracked down the problem.

My problem before was that I was only looking at TWindow.HandleEvent for the
solution.  However, when I failed to find anything there, I should have kept
going up the heirarchy for the solution.  TWindow is descended from TGroup, so
TWindow.HandleEvent calls TGroup.HandleEvent.  TGroup.HandleEvent calls the
HandleEvent for each of its views.  I traced the problem to one of these views
that TGroup.HandleEvent was passing the event along to; this was where the
event was getting inappropriately cleared.

The moral?  Always remember that you have to trace both upwards (through
overridden ancestor methods that your methods call) and downwards (through
"member" objects attached to yours, as with TGroup), and that you have to
trace all the way to the end, not just one step back.

Class is over.  Go home now.
--
"The problem you are experiencing is  |  "To be sure of hitting the target,
not with the network nor with the     |  shoot first and, whatever you hit,
station.  Please adjust your set."    |  call it the target."
More ramblings from: [e-mail]/[e-mail]