Re: Typing in a widget_text crashes my C program!

[Jason Weiss <weiss(at)astro.ucla.edu>]

Actually, I'm experiencing these problems with no event handling.  I've been
able to reproduce the crash with the following simple code:

  pro make_it_crash

    base=widget_base(/col)
    text=widget_text(base, /editable)

    widget_control, base, /realize

  end

Thinking event handling could alleviate the problem, i added

  pro text_event, event

  end

and

    xmanager, 'text', text, /just_reg, /no_block

to my program, and it still crashed...

without you guys knowing the particulars of the C-code or perhaps the PCI
driver, I don't expect a solution.  But info as to what IDL is doing when
you type into a text box would be a good starting point for me...



David Fanning wrote:

> Jason Weiss writes:
>
> > Been using IDL (currently 5.4) for a while now, but I've come across a
> > unexpected problem that has left me frustrated.   We are using some
> > C-code to drive some electronics through a PCI card on our Sun Ultra
> > 10.  During readout of our electronics, I noticed it would
> > intermittently crash.  After weeks of mysterious crashes, I discovered
> > the program crashes when I type into a widget_text box!
> >
> > Any ideas why?  What happens, on a system level, when a user types into
> > a widget_text?  What would cause this (or any) kind of interaction
> > between IDL and C?
>
> Poorly written or misunderstood event handling?
> Just guessing. :-)
>
> Cheers,
>
> David
>
> --
> David Fanning, Ph.D.
> Fanning Software Consulting
> Phone: 970-221-0438 E-Mail: davidf@dfanning.com
> Coyote's Guide to IDL Programming: http://www.dfanning.com/
> Toll-Free IDL Book Orders: 1-888-461-0155

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