| Re: viewport events in widget_draw [message #12021] |
Wed, 17 June 1998 00:00 |
krieger
Messages: 7
Registered: June 1997
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Junior Member |
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In article <MPG.ff0b2002d397d539897e8@news.frii.com>,
davidf@dfanning.com (David Fanning) wrote:
> Karl Krieger (krieger@ipp.mpg.oz) writes:
>
>> Has anyone managed to read out viewport coordinates generated by
>> a viewport scrolling event?
>
> Try this:
>
> Widget_Control, event.id, Get_Draw_View=thisView
> Print, thisView
Thank's to all who pointed this out. RTFM, I know, but it's easy to get
lost in this tome ;-)
Karl
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| Re: viewport events in widget_draw [message #12025 is a reply to message #12021] |
Wed, 17 June 1998 00:00  |
menakkis
Messages: 37
Registered: June 1998
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Member |
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krieger@ipp.mpg.oz (Karl Krieger) wrote:
> Has anyone managed to read out viewport coordinates generated by
> a viewport scrolling event? I am using IDL 5.1 under WinNT4.0.
> Setting /viewport_events as keyword for widget_draw makes
> the widget generate events when the scroll slider bars are moved
> (event.type is 3), however, I found no way to get the actual
> viewport coordinates with respect to the plotting plane.
> event.x and event.y return zero.
When handling the viewport event (event.type eq 3), use
WIDGET_CONTROL,draw_widget_id,GET_DRAW_VIEW=dview. Dview will be returned as
"a 2-element integer array giving the X and Y position relative to the lower
left corner of the graphics area".
Peter Mason
-----== Posted via Deja News, The Leader in Internet Discussion ==-----
http://www.dejanews.com/ Now offering spam-free web-based newsreading
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