| Re: more specifically [message #14033] |
Tue, 19 January 1999 00:00 |
davidf
Messages: 2866
Registered: September 1996
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Senior Member |
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Brad Gom (gombg@uleth.ca) writes:
> ooops, I should be more specific.. problem 1. only occurs for the "CM" version of
> xwindow and ps_form by Craig Markwardt. I guess I should email him directly.
Oh, well, then I guess Craig is going to have to get the latest
versions and see how to fix his own programs. :-)
The problem of PS_FORM running through it's block is because
the program you are calling IDL from is itself a blocking program.
You could solve all your problems by making this calling program
non-blocking, or you could make PS_FORM a true modal widget.
(This is the solution I used.) It is only the *FIRST* blocking
widget program that establishes the block. All subsequent widget
programs will run through their blocks.
> problem 2, however, still mystifies me
Humm. Well, consider this. IDL direct graphics windows
don't have a clue what you put in them. That is why they
are not re-sizeable. XWindow "knows" what you put inside
it when you call it, but is stone-dead dumb otherwise.
If you want more intellegence than that then you have
to have some way to make the "intelligence" persistent.
XWindow has pretty persistent intelligence (at least
in its limited sense), but the intelligence is just
not easily accessible from outside the program. If the
intelligent part of it could be made into an object
(the intelligent part needs to know the command you
want to execute, what data you want to use with the
command, what the keywords are and their values, etc.)
then you could easily access the intelligence through
one or more "methods": IDL procedures that you would
write to do whatever it is you want to do (i.e., change
the command and the data so that it does something other
than what it used to do.)
It's all explained in detail in my next book, which
I'm starting to write next week. (I've decided to go completely
away for 10 days with no phones, no faxes, no e-mails,
no nothing to distract me while I get the damn thing
started.) If you don't have it sorted out before I get
back, and Craig hasn't already written the new, greatly-
improved, object version, I'll sell you a book cheap. :-)
Cheers,
David
--
David Fanning, Ph.D.
Fanning Software Consulting
Phone: 970-221-0438 E-Mail: davidf@dfanning.com
Coyote's Guide to IDL Progamming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155
[Note: This follow-up was e-mailed to the cited author.]
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