| Re: update of drawing widgets [message #32202] |
Fri, 20 September 2002 06:01 |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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Dominik Paul (dpaul@ukl.uni-freiburg.de) writes:
> I have small GUI including a draw widget.
> When the draw widget is hidden by another window, it loose it contents. Is
> there a way for an automatic update of the draing in the widget? Or is there
> an event, which occusr, when the widget is seen again?
This must not be a program you wrote, since it
is not possible to create the draw widget without
knowing the answer to these questions. :-)
I'd search the code for "WIDGET_DRAW" and when
I found the line creating the draw widget I would
look to see what state the RETAIN keyword is in,
and whether EXPOSE_EVENTS are turned on.
Cheers,
David
--
David W. Fanning, Ph.D.
Fanning Software Consulting, Inc.
Phone: 970-221-0438, E-mail: david@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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