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Re: object newbie [message #21197 is a reply to message #21141]

Thu, 17 August 2000 00:00

promashkin
Messages: 169
Registered: December 1999

Senior Member

marc wrote:
>
> ...
>> 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

I thought that object definition statement can have any number as a
field definition, and it won't matter, because when new object is
created, they all will be set to zero anyway. Top base ID will have to
be placed in that field once it is created, right?

Cheers,
Pavel

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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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