NetNews Usenet Archive 1993 #3/NN_1993_3.iso/spool/comp/windows/openloo/5147

Internet Message Format | 1993-01-25 | 1.1 KB

Path: sparky!uunet!mcsun!ieunet!ccvax.ucd.ie!ctoomey
From: [e-mail]
Newsgroups: comp.windows.open-look
Subject: Weird XView 3.0 XV_KEY_DATA problem
Message-ID: <[e-mail]>
Date: 22 Jan 93 13:27:48 GMT
Organization: University College Dublin
Lines: 19

Hi All,
    came across a weird problem with XView 3.0 today. I created a canvas as
a child of a frame and attached 11 items to it's paint window using
XV_KEY_DATA. This worked fine with XView 2.0 but crashed under version 3.0.
The cause seemed was an xv_get(window,XV_KEY_DATA,5) instruction which should
have returned NULL because that item had not yet been set. I tried setting the
item in advance - now the thing crashed just after the start of the xv main
loop. After many hours poring over manuals and wracking my brains for possible
causes I tried changing the 5 to a 23. It worked!

    What I'd like to know is why? Is it a mistake in my code (there are
definitely no other items with this number) or is there an instruction in XView
3.0 like "if key==5 then crash" :-) If anyone has any ideas I'd like to know...

            thanks in advance,

            Colm Toomey

            [e-mail]