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Capturing draw events [message #6351]

Sat, 22 June 1996 00:00

Phil Williams
Messages: 78
Registered: April 1996

Member

Widget programmers,

I was wondering if anyone out there can help me out with a problem....

Here's the situation. I have a widget with several control panels
created with coumpound widgets. They all have state structures which I
save in the uvalue of the first child of the base. These structures
typically have the ids of any child widgets that I need access to.

When one of these panels is displayed I want to send any draw events to
a different procedure to process the event and update child widgets of
that panel. However, the following does not work:

pro panel_draw_event, draw_event, parent

stash = WIDGET_INFO(parent, /CHILD)
WIDGET_CONTROL, stash, GET_UVALUE=r, /NO_COPY

widget_control, r.textwidgetid, $
set_value=string(draw_event.x) + string(draw_event.y)

WIDGET_CONTROL, stash, SET_UVALUE=r, /NO_COPY

end

From the main widget I pass the event structure and the mainbase id of
the panel from when it was originally created. I have checked
panel_draw_event to make sure that parent was indeed the correct value
and it is. Can I only retrieve the structure r if the handler and the
parent are the same? If so, how can I work around this?

Any pointers would be greatly appreciated...

--
/*********************************************************** ********/
Phil Williams, Ph.D.
Research Instructor
Children's Hospital Medical Center "One man gathers what
Imaging Research Center another man spills..."
3333 Burnet Ave. -The Grateful Dead
Cincinnati, OH 45229
email: williams@irc.chmcc.org
URL: http://scuttle.chmcc.org/~williams/
/*********************************************************** ********/

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[Message index]

		Capturing draw events By: Phil Williams on Sat, 22 June 1996 00:00
		Re: CAPTURING By: David Foster on Mon, 04 November 1996 00:00
		Re: CAPTURING By: brian.jackel on Sun, 03 November 1996 00:00
		Re: CAPTURING By: Christian Soeller on Thu, 31 October 1996 00:00
		Re: CAPTURING By: Tim Patterson on Thu, 31 October 1996 00:00
		Re: CAPTURING By: Craig DeForest on Thu, 31 October 1996 00:00
		Re: CAPTURING By: davidf on Thu, 31 October 1996 00:00
		Re: CAPTURING By: James Tappin on Thu, 31 October 1996 00:00

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