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Re: Save 2D conversion matrix [message #46206 is a reply to message #46163]

Wed, 09 November 2005 00:45

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Peter Albert writes:

> Aehmm, well, this *is* part of a widget ... But now that you mention
> it, TRACKING_EVENTS of a draw widget might also work ... But that would
> mean that I have to drop the WIDGET_TIMER events now that I finally
> managed to use them ... :-)

Uh, well, it is Button and Motion events (along with their
cousins PRESS and RELEASE) that actually mirror and extend
what can be done with the CURSOR command in a draw widget.
With the draw widget event structure, there is really no
reason to find the CURSOR command anywhere near a widget
program. :-)

Cheers,

David

P.S. And in old days (I doubt this is true now) the CURSOR
command, used in a draw widget, would actually return the
wrong values. But only slightly wrong, so that you wouldn't
realize they were wrong until the space probe was about to
crash into the planet. :-)

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/

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[Message index]

		Save 2D conversion matrix By: peter.albert@gmx.de on Mon, 07 November 2005 07:09
		Re: Save 2D conversion matrix By: peter.albert@gmx.de on Wed, 09 November 2005 02:36
		Re: Save 2D conversion matrix By: David Fanning on Wed, 09 November 2005 06:01
		Re: Save 2D conversion matrix By: David Fanning on Wed, 09 November 2005 05:48
		Re: Save 2D conversion matrix By: David Fanning on Wed, 09 November 2005 05:43
		Re: Save 2D conversion matrix By: David Fanning on Wed, 09 November 2005 00:45
		Re: Save 2D conversion matrix By: peter.albert@gmx.de on Wed, 09 November 2005 11:51
		Re: Save 2D conversion matrix By: David Fanning on Wed, 09 November 2005 08:07
		Re: Save 2D conversion matrix By: peter.albert@gmx.de on Wed, 09 November 2005 06:40

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