MouseMoveEvents

tblanchard at mac.com tblanchard at mac.com
Tue Aug 12 18:36:52 UTC 2003


That sounds backwards.  Didn't the move start at trail last and end at 
the hand position?

On Tuesday, August 12, 2003, at 12:13  PM, Andreas Raab wrote:

>> 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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