| Re: iimage tool [message #39948 is a reply to message #39896] |
Wed, 23 June 2004 20:16   |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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Mark Hadfield writes:
> Have you noticed that FSC_SURFACE exhibits the behaviour? :-)
Humm. No, I *hadn't* noticed this. Weird, isn't it. :-)
>
> The no-event-handling-while-waiting-at-a-breakpoint issue applies to all
> (non-blocking) widget programs. Some will display a graph in this
> situation, some will show an empty window (probably waiting for an
> expose event), but in all cases you can't interact with them because the
> widget queue is stopped.
Yes, I think this is waiting for an expose event. It is odd
when certain things happen and when they don't. I was surprised
the other day when a notify realize happened *immediately*
when the widget was created, before I had actually saved the
widget id in my object. I recall another problem with a
CleanUp routine being called in a different order under
Windows than it was in UNIX. That frustrated me for a day
or so.
> This has frustrated me for some time.
Really!? I would have thought there wasn't much that
could happen in IDL that I haven't been frustrated about
at one time or another, but I have to admit this "problem"
has never shown up on my radar screen.
> When I stop a program at a
> breakpoint I want to be able to make use of the full range of
> visualisation tools, not just blocking widgets and non-widget commands.
I guess here is the difference between us. When I stop a program
it is to figure out what dumb ass mistake I have made, not to use
the full power of IDL visualization. :-)
> Based on Daryl Attencio's code, I came up with the routine below
> (currently called MGH_YIELD, but I'm sure there's a better name).
Well, I have to admit this is neat. I'm just trying to figure
out if I can upgrade my programming enough to make it useful. :-)
Cheers,
David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
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