Path: utzoo!utgpu!jarvis.csri.toronto.edu!clyde.concordia.ca!uunet!wuarchive!mit-eddie!uw-beaver!apollo!apollo.hp.com!yon
From: yon@apollo.HP.COM (David Yon)
Newsgroups: comp.lang.smalltalk
Subject: Smalltalk V/286 TopPanes
Message-ID: <47d02008.20b6d@apollo.HP.COM>
Date: 3 Jan 90 12:28:00 GMT
Sender: root@apollo.HP.COM
Reply-To: yon@apollo.HP.COM (David Yon)
Organization: Hewlett-Packard Apollo Division - Chelmsford, MA
Lines: 23

Has anyone had trouble with seemingly "orphaned" TopPanes (and
their associated subpanes and editors)?

I'm working on a prototype which has a lot of activity in terms
of creating new TopPanes (for editing objects) which only remain
open for a short time.  I first noticed a problem when I tried to
remove my subclass of TextEditor called "LineEditor", a specialized
Editor for single-line text panes.  Since I recieved the Goodies#2
with the Field Pane Class, I no longer had any use for it.

At any rate, when I tried to remove LineEditor from the system, I got the
message, "has instances".  I evaluated "LineEditor allInstances" and
lo and behold there were around 10 instances remaining.  Curious,
I also evaluated "TopPane allInstances", and found that even though
there were only 5 windows opens on the screen, there were 23 instances
of TopPane in the system dictionary.  Upon closer inspection, I found
that these were instances of windows that I had closed long ago.

Why would these still be around?  When I created the TopPanes, they
were attached only to temporary variables.  Why wouldn't they disappear
when I clicked the close box?

Any help appreciated...