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Re: CW_DEFROI (some help for dumb person doing first widget prog...) [message #44748]

Fri, 15 July 2005 23:30

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Peter Clinch writes:

> Next up, in my event handler for the menu option that will activate the
> ROI selection, I start with
>
> wDraw=widget_info(event.top, find_by_uname="Draw")
>
> CentreROI=CW_DEFROI(wDraw)
>
> that creates the relevant ROI widget, and the cursor position is updated
> when the mouse is over the image, but it doesn't appear to draw anything
> on the image. Can anyone one tell me exactly how I'm being Dumb here?

You passed CW_DEFROI the draw widget identifier. It needs
the graphics window index number, which is the *VALUE*
of the draw widget (after it has been realized).

wDraw=widget_info(event.top, find_by_uname="Draw")
Widget_Control, wDraw, Get_Value=windex
WSet, windex
CentreROI=CW_DEFROI(windex)

Cheers,

David

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

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[Message index]

		Re: CW_DEFROI (some help for dumb person doing first widget prog...) By: David Fanning on Fri, 15 July 2005 23:30
		Re: CW_DEFROI (some help for dumb person doing first widget prog...) By: Peter Clinch on Mon, 18 July 2005 03:38
		Re: CW_DEFROI (some help for dumb person doing first widget prog...) By: Peter Clinch on Mon, 18 July 2005 01:47

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