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Re: Free-hand ROIs using DRAW_WIDGET [message #26665 is a reply to message #26662]

Wed, 19 September 2001 20:08

Andrew Cool
Messages: 219
Registered: January 1996

Senior Member

Andre Kyme wrote:
>
> Hi,
>
> Cannot see how to use the event-generating options provided by
> WIDGET_DRAW in order to draw a free hand ROI.
> If I could interrupt motion events I can do it, but I can't stop motion
> events once they are going!
>
> Any help would be appreciated,
>
> Thanks,
> Andre

Andre,

Something like this should do the trick. This uses Mouse Button 3
to toggle the motion events on/off.

Pseudo English:
If a button is pressed DOWN and it's MB 3 Then
Check status of motion events
Toggle motion events to opposite setting
end

IF ev.type EQ 0 AND ev.press EQ 4 THEN BEGIN
IF Widget_Info(ev.id,/DRAW_MOTION_EVENTS) THEN BEGIN
Widget_control, ev.id,Draw_Motion_Events=0
ENDIF ELSE BEGIN
Widget_control, ev.id,Draw_Motion_Events=1
ENDELSE
ENDIF

Andrew

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Andrew D. Cool .->-.
Electromagnetics & Propagation Group `-<-'
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South Australia 5108

Phone : 061 8 8259 5740 Fax : 061 8 8259 6673
Email : andrew.cool@dsto.defence.gov.au
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[Message index]

		Re: Free-hand ROIs using DRAW_WIDGET By: Liam E. Gumley on Thu, 20 September 2001 10:59
		Re: Free-hand ROIs using DRAW_WIDGET By: David Fanning on Wed, 19 September 2001 21:39
		Re: Free-hand ROIs using DRAW_WIDGET By: Andrew Cool on Wed, 19 September 2001 20:08

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