[sugar] Fwd: Finding cursors. Ripples in a puddle?

[Ken Ritchie]

Oops! I forgot to use 'reply all' in my response to Bert...

Cheers,
-KR
;-)


Begin forwarded message:

> From: Bert Freudenberg <bert at freudenbergs.de>
> Date: November 25, 2008 8:46:39 EST
> To: "Ken Ritchie" <classmaker at gmail.com>
> Subject: Re: [sugar] Finding cursors. Ripples in a puddle?
>

> (Did you intentionally not send this to the list? If not, feel free  
> to forward my response.)
>
> On 25.11.2008, at 13:11, Ken Ritchie wrote:
>>
>> How would I get an event from the XO touchpad when it is touched?  
>> (I wanted to figure this out before replying to your Etoys list  
>> msg ...)
>>
>> - Bert -
>>
>> I don't know, as I haven't explored the etoys code yet.  Do the  
>> "mouse down" and "mouse up" events come through?  Mouse down would  
>> certainly happen on a tap, and hopefully at the beginning of a  
>> drag, wouldn't it?  What about a light touch and liftoff...even  
>> with no tap and no drag?
>
> This is independent of Etoys, I was asking in general. Tap-to-click  
> is disabled on the XO, as far as I am aware there are no events  
> visible to user software when the pad is touched. The hardware  
> supports this though, and if you run other Linux on the XO it does  
> tap-to-click.
>
>> Do you think would like it best if the ripple occurred on touchdown  
>> or liftoff...or both?
>
> Touchdown only.
>
>> In my mind's eye, I imagine the surface tension letting go and  
>> causing a ripple as I lift my finger off the pad. Of course, it  
>> could ripple on landing, too. However, I was wondering about what  
>> *minimal* effects would be *just enough* rather than making lots of  
>> ripples during frequent pad strokes when I am most likely to be  
>> aware of the cursor's location.
>
>
> Yep, this would take a lot of fine tuning to not be annoying.
>
> One could experiment with this by just using move events - if the  
> pointer was not moved for some time, and then is moved, that could  
> trigger the effect.
>
> - Bert -
>
>
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