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Draw widget mouse position error [message #21130]

Fri, 11 August 2000 00:00

Oliver Smith
Messages: 11
Registered: March 2000

Junior Member

Hi,

I use a draw widget with motion events turned on, I've noticed that a double
click event has a different y-position to a single click event. This is
demonstrable by the code at the bottom of this message. For a double click,
the events returned give:
X Y
Cursor position = 187 110
Cursor position = 187 110
Cursor position = 187 111
Cursor position = 187 110

It is easy to work around the problem by detecting the double click
(event.clicks = 2) and subtracting 1 from event.y

I can recreate the problem on another computer of almost identical
specification to my own. I am using IDL 5.3.1 on NT 4. Can anybody recreate
this bug and on what platforms?

Regards,

Oliver Smith

PRO DRAW_EVENT, event
Print, 'Cursor position = ', Event.x, Event.y
END

PRO ojs

base = Widget_Base(UNAME = 'WID_BASE', SCR_XSIZE=300 ,SCR_YSIZE=200)
draw = Widget_Draw(Base, UNAME = 'WID_DRAW',SCR_XSIZE = 300, SCR_YSIZE =
200, /BUTTON_EVENTS, EVENT_PRO = 'DRAW_EVENT')

Widget_Control, /REALIZE, base
Xmanager, 'WID_BASE', base, /NO_BLOCK

END

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[Message index]

		Draw widget mouse position error By: Oliver Smith on Fri, 11 August 2000 00:00
		Re: Draw widget mouse position error By: Oliver Smith on Tue, 15 August 2000 00:00
		Re: Draw widget mouse position error By: Rostyslav Pavlichenko on Tue, 15 August 2000 00:00
		Re: Draw widget mouse position error By: mikef on Mon, 14 August 2000 00:00
		Re: Draw widget mouse position error By: davidf on Mon, 14 August 2000 00:00
		Re: Draw widget mouse position error By: Oliver Smith on Mon, 14 August 2000 00:00

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