MouseMoveEvents
Andreas Raab
andreas.raab at gmx.de
Tue Aug 12 18:13:45 UTC 2003
> Is this intended?
No, this is a bug. The start point should be set to the position where the
hand is, e.g.,
HandMorph>>generateMouseEvent: evtBuf
"..."
^MouseMoveEvent new
setType: type
startPoint: self position "<- here"
endPoint: trail last
Cheers,
- Andreas
> -----Original Message-----
> From: squeak-dev-bounces at lists.squeakfoundation.org
> [mailto:squeak-dev-bounces at lists.squeakfoundation.org] On
> Behalf Of Eddie Cottongim
> Sent: Tuesday, August 12, 2003 8:11 PM
> To: squeak-dev at lists.squeakfoundation.org
> Subject: MouseMoveEvents
>
>
> While I was trying to use MouseMoveEvents I noticed something I don't
> understand.
>
> You can query a MouseMoveEvent for its starting and ending
> points. If I move
> the mouse slowly, I'm finding that startingpoint always
> equals endingpoint.
> I understand that occasionally zero-length moves may come in.
> What I mean is
> that starting point is never different from ending point,
> even though the
> mouse has moved.
>
> Here's what I mean. The events coming in look like this:
> starting ending
> 148 at 148 148 at 148
> 149 at 148 149 at 148
> 150 at 148 150 at 148
>
> If the mouse has moved, shouldn't starting point be different
> than ending
> point for at least one of the mouseMoves?
>
> One way you can check this out is by adding this statement to
> HandMorph>>handleEvent:, preferably inside the ShowEvents
> block so you can
> turn it on and off with "HandMorph showEvents: true":
>
> (evt isKindOf: MouseMoveEvent ) ifTrue:[ ((evt
> startPoint)~=(evt endPoint))
> ifTrue:[self beep] ].
>
> This will beep when a non-zero length mouseMove comes in. If
> I move the
> mouse slowly, this never happens! If I move it quickly, the
> beeps happen
> frequently, which is what I expect.
>
> Is this intended?
>
> Eddie
>
> PS. Ok, for fun I turned ON the higherPerformance
> preference. Now, the
> startingPoint=endingPoint practically all the time,
> regardless of how fast I
> move the mouse. with higherPerformance on I would expect the
> moves to be
> perhaps smaller, but still, it seems like the mouseMoves
> should report a
> delta occasionally at least.
>
>
>
>
>
>
>
>
>
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