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Re: Cursor Position with Draw Widget [message #3099 is a reply to message #3090]

Wed, 02 November 1994 15:56

scott
Messages: 17
Registered: January 1994

Junior Member

Ken Ganga writes
> Hi,
>
> I'm trying to figure out how to return the cursor position from an
> event in a draw widget. I want the coordinates to be in data
> coordinates. This seems to be possible for a regular graphics window
> through the cursor command, but I can't figure out how to do it within
> a draw widget as the documentation says not to use the cursor command.
>
> Any help would be appreciated. Thanks,
>
> Ken

You get the coordinates directly from the event structure returned when
the user clicks in the Draw Widget. They are in event.X and event.y, in
device coords. To get the coords in data coords, do the following:

coords = CONVERT_COORD(event.X, event.Y, /DEVICE, /TO_DATA)

See page 1-340 of the IDL Reference Guide (v. 3.6.1) for more info, or
feel free to email me.

--
A. Scott Denning (303)491-8346
<scott@abyss.atmos.colostate.edu>
Dept. of Atmospheric Science
Colorado State University
Fort Collins, CO 80523

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[Message index]

		Cursor Position with Draw Widget By: ganga on Wed, 02 November 1994 12:33
		Re: Cursor Position with Draw Widget By: 8015 on Thu, 03 November 1994 09:47
		Re: Cursor Position with Draw Widget By: rivers on Wed, 02 November 1994 20:04
		Re: Cursor Position with Draw Widget By: scott on Wed, 02 November 1994 15:56

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