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Re: object newbie [message #21204 is a reply to message #21141]

Thu, 17 August 2000 00:00

marc schellens[1]
Messages: 183
Registered: January 2000

Senior Member

...
> If you destroy the widget, you set self.tlb to -1, and in your
> cleanup method, you test IF self.tlb GE 0 THEN widget_control,
> self.tlb,/DESTROY.
Nearly irrelevant, but just for completeness:
Better put self.tlb to 0. Only 0 is garanteed to never be a widget ID.
(Somewere I saw this in the documentation (al least implicit))
and better check with widget_info(self.tlb,/VALID_ID).
Then you did not even need to set it to 0.
(But better do since a widget ID might be reused (perhaps same
probability as that it might be -1 ;-))
:-) marc

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[Message index]

		object newbie By: John D. Sample on Thu, 10 August 2000 00:00
		Re: object newbie By: promashkin on Thu, 17 August 2000 00:00
		Re: object newbie By: marc schellens[1] on Thu, 17 August 2000 00:00
		Re: object newbie By: Martin Schultz on Tue, 15 August 2000 00:00
		Re: object newbie By: promashkin on Mon, 14 August 2000 00:00
		Re: object newbie By: marc schellens[1] on Sun, 13 August 2000 00:00
		Re: object newbie By: Martin Schultz on Wed, 16 August 2000 00:00
		Re: object newbie By: John D. Sample on Tue, 15 August 2000 00:00
		Re: object newbie By: Martin Schultz on Mon, 21 August 2000 00:00

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