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Re: WIDGET_DRAW event.press/release values for mouse wheel events..undocumented? [message #55291]

Thu, 16 August 2007 11:30

Paul Van Delst[1]
Messages: 1157
Registered: April 2002

Senior Member

Richard Clark wrote:
> Yes, I have encountered this too. We use intel linux systems with pc
> type wheel mice.
>
> Neither the bu... I mean feature, nor its fix (in version 6.4) seems
> to be documented.
>
> After checking event.type for UP, DOWN, or MOTION mouse events, check
> for PRESS or RELEASE values >4.
>
> Here is a code snippet from a heavily modified version of Fanning's
> DRAWBOX_WIDGET example procedure that I use to get around it.
> It looks like you've already found the same fix.

Similar. I now use the following:

FUNCTION WPLOT_Which_Button, Value
CASE Value OF
1: e='LEFT'
2: e='MIDDLE'
4: e='RIGHT'
8: e='UP'
16: e='DOWN'
ELSE: e='NONE'
ENDCASE
RETURN, e
END

and call it thusly:

IF ( WPLOT_Which_Button(event.RELEASE) EQ 'LEFT' ) THEN BEGIN
....

I decided to use the CASE statement since one can't rely on the 8 and 16 values remaining
valid (and apparently, in v6.4, they're not)

cheers,

paulv

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[Message index]

		Re: WIDGET_DRAW event.press/release values for mouse wheel events..undocumented? By: Paul Van Delst[1] on Thu, 16 August 2007 11:30
		Re: WIDGET_DRAW event.press/release values for mouse wheel events..undocumented? By: rclark on Thu, 16 August 2007 10:39
		Re: WIDGET_DRAW event.press/release values for mouse wheel events..undocumented? By: David Fanning on Thu, 16 August 2007 07:18
		Re: WIDGET_DRAW event.press/release values for mouse wheel events..undocumented? By: rclark on Thu, 16 August 2007 12:54

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