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Re: IDL 5.0 widget bug?
| Re: IDL 5.0 widget bug? [message #11115] |
Wed, 11 March 1998 00:00 |
davidf
Messages: 2866
Registered: September 1996
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Senior Member |
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Russ Welti (on mapper) (rwelti@mapper.mbt.washington.edu) writes:
> I'm tracking down a application freeze-up in my 4.0->5.0
> ported IDL app. (The app is FINE in 4.0 but 5.0 is causing
> headaches, crashes and freezes.)
>
> Note: this is in the KILL_NOTIFY callback of a top level
> base which is being killed due to the window manager's close
> menu pick under Solaris 2.5. The widget has already disappeared
> from the screen when the first /valid returns true above!
> (attempts to /show or /map it fail. it seems quite INvalid)
Although the IDL manual warns you many times in many places,
I don't think it gets its point across at all well. But here
it is again. Do NOT use Kill_Notify on a widget that is
being DIRECTLY managed by XManager. It results in weird and
unpredictable behavior (e.g., see the program above).
Use the CLEANUP keyword on the XManager call to assign
a Cleanup routine (exactly LIKE a Kill_Notify routine,
except that it doesn't cause these problems) for widgets
directly managed by XManager.
Cheers,
David
-----------------------------------------------------------
David Fanning, Ph.D.
Fanning Software Consulting
E-Mail: davidf@dfanning.com
Phone: 970-221-0438
Coyote's Guide to IDL Programming: http://www.dfanning.com/
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