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Re: Realizing a widget only once [message #39014 is a reply to message #39008]

Wed, 14 April 2004 08:32

Pavel Romashkin
Messages: 166
Registered: April 1999

Senior Member

You would have to somehow record the fact that the widget has been
created. The simplest place for doing this is a Common block with a
specific name, where you can set a flag. There are alternatives that
have been discussed here before; a Google groups search for IDL global
variable would turn up quite a variety of answers.
Good luck,
Pavel

Ahammer Helmut wrote:
>
> Is there any possibility to open and realize a widget only once, even
> it is called several times? The widget is mainly a draw widget for
> images and is called from an other program or widget like this:
>
> DISPLAYIMAGE, Image = Image
>
> The first call, or if there is no such widget present, should really
> realize the widget. The second call should not realize a second
> widget, but only put the new data (image) to the draw widget.
> I think the /OVERPLOT keyword for IIMAGE does equivalently what I
> want, but I can`t follow the itools syntax for this feature.
>
> Thank you for every input,
> Helmut Ahammer

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[Message index]

		Re: Realizing a widget only once By: cabrera on Thu, 15 April 2004 00:56
		Re: Realizing a widget only once By: R.Bauer on Thu, 15 April 2004 00:52
		Re: Realizing a widget only once By: helaha on Wed, 14 April 2004 23:36
		Re: Realizing a widget only once By: R.Bauer on Wed, 14 April 2004 14:14
		Re: Realizing a widget only once By: Pavel Romashkin on Wed, 14 April 2004 08:32

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