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Re: Realizing a widget only once [message #39008 is a reply to message #39006]

Wed, 14 April 2004 14:14

R.Bauer
Messages: 1424
Registered: November 1998

Senior Member

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

Dear Helmut,

the only thing you need to know is the id of the draw widget. You do not
need to copy this information elsewhere. You must only ask for it.

If the draw widget is already realized then you can get the id of the
widget by it's uname.
id=WIDGET_INFO(event.top,FIND_BY_UNAME='DRAW_WINDOW')

How to use uname you could see here:
http://www.fz-juelich.de/vislab/software/idl_samples/Widgets /Oberflaechen
wid5.pro

Further examples you'll find at
http://www.fz-juelich.de/vislab/software/idl_samples
IDL-Beispielsammlung.html

cheers

Reimar

--
Forschungszentrum Juelich
email: R.Bauer@fz-juelich.de
http://www.fz-juelich.de/icg/icg-i/
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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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