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Re: Clearing widget_list of all entries [message #18938 is a reply to message #18937]

Thu, 17 February 2000 00:00

davidf
Messages: 2866
Registered: September 1996

Senior Member

Robert Weiss (weiss@mpia-hd.mpg.de) writes:

> Does anyone of you know a way to clear a widget_list of all items ?
> Using widget_control with set_value doesn't work since no string arrays
> of zero
> length are permitted in IDL.

I should think Widget_Control, listWidgetID, Set_Value="" would
do pretty much what you want. With, perhaps, some kind of
check in the list event handler to not respond to any
event that generated a null string for a value.

Or, if even this was too much list, you could put the list
widget in a bulletin-board base and simply unmap the base
widget. This would make the whole thing disappear, no matter
how many list items it contained.

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/
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		Re: Clearing widget_list of all entries By: Robert Weiss on Thu, 17 February 2000 00:00
		Re: Clearing widget_list of all entries By: davidf on Thu, 17 February 2000 00:00

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