| Re: XY Coords & Widgets [message #5071] |
Sun, 24 September 1995 00:00 |
mgs
Messages: 144
Registered: March 1995
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Senior Member |
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In article <43mojs$25h@news.isc.rit.edu>, bjp8350@osfmail.isc.rit.edu
(PRYHODA) wrote:
> I am trying to extract XY Coords from an widget_draw window. I know there
> is a function for doing this in a normal window but can this be done in a
> widgets program?
Yes. Use the event.x and event.y parameters of the returned event
structure to get the positions. Something like this will do what you're
after. There's some extra code in this for processing different mouse
buttons and whether they are pressed or released, also.
pro tmp_event, event
print, 'Press/Release: ', event.press, event.release
if (event.release gt 0) then begin
print, 'X/Y position: ', event.x, event.y
case event.release of
1: print, 'left button released'
2: print, 'middle button released'
4: print, 'right button released'
else: print, 'multi-button release (possible?)'
endcase
print
endif
end
pro tmp
base = widget_base()
draw = widget_draw(base, xsize=200, ysize=200, /button_events)
widget_control, base, /Realize
Xmanager, 'tmp', base
end
IDL> tmp
Press/Release: 1 0
Press/Release: 0 1
X/Y position: 11 192
left button released
Press/Release: 2 0
Press/Release: 0 2
X/Y position: 89 104
middle button released
Press/Release: 4 0
Press/Release: 0 4
X/Y position: 192 8
right button released
--
Mike Schienle
Custom Data Visualizations
mgs@seldon.terminus.com
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