| Bug with object graphics, app_scroll and the mouse in 6.1 under Windows. [message #40686] |
Tue, 24 August 2004 12:16 |
dcw_yip
Messages: 22
Registered: October 2003
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Junior Member |
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So I upgraded to IDL 6.1. Now my program doesn't handle mouse events
properly. I tracked it down and it seems that there's a bug with IDL
6.1 under Windows if you have a draw widget with app_scroll and object
graphics enabled. The symptom is that the y coordinate of the mouse
event oscillates between the correct value and the correct value plus
the scroll range. So say the ysize of the widget is 600 and the
draw_ysize is 800. When you click in the widget so that you're on y
of 363, it oscillates between 363 and 563 even though you are clicking
on the same spot over and over again. This didn't happen under 6.0 or
6.1 beta. This also doesn't happen on a Mac.
I need both object graphics and scrolling. Is there a way around this
or should we just drop back to 6.0?
David
Here's a program and output that demonstrates this:
---------------------- program -----------------------
pro bug_event, event
print, event.x, event.y
end
pro bug
base = widget_base(title='bug')
draw = WIDGET_DRAW(base, /button_events, /app_scroll, $
graphics_level=2)
widget_control, draw, xsize=600, ysize=600, draw_xsize=1200, $
draw_ysize=1200
widget_control, base, /realize
xmanager, 'bug', base
end
----------------------- output -----------------------
404 363
404 563 <-- wrong value
404 363
404 364
404 363
404 563 <-- wrong value
404 363
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