ubuntu-tablet team mailing list archive

[Christian Giordano <christian.giordano@xxxxxxxxxxxxx>]

HI Henri, I think this is an interesting discussion because pens on tablet,
regardless what Apple says, are very hot at the moment:

[image: Inline image 1]

A problem currently presence in drawing applications is the detection of
the hand touch when you are using one of these pens. To solve this problem,
with graphical tablet, it was recommended one of these gloves:

[image: Inline image 2]

Some applications are reducing dramatically the problem through algorithms
but, if you think that on iOS information like finger size wan't available
(not sure 100% if still isn't), this was indeed very challenging.

I don't know the Samsung Serie 7 Slate pen, but I guess we should support
any kind of pen. Even the ones who simply emulate the finger. In this case
information like finger size, if available from the hardware, could be used
to differentiate a pen from a finger and maybe the drawing application can
let the user choose the input (to avoid the hand touch issue). Not sure we
should support a pen detection everywhere in the system.

It would be good to have some use cases.


Cheers, chr



On Tue, Mar 20, 2012 at 9:52 PM, Henri Sundelin <henri.sundelin@xxxxxx>wrote:

> [As suggested, reposted this unity-design->unity-tablet]
>
> Hello everybody,
>
> I just joined on this list - seems the right place to be as I started my
> tablet usability hacking (or should this be posted somewhere else?).. I got
> myself a new Samsung Series 7 Slate, and I've been evaluating latest
> Precise on it. Works somewhat, lots of more work required though. We'll
> see..
>
> So, this device gave me some ideas on how different tablet style input
> devices like touchscreens, pens etc, should be handled - currently
> everything is always "on", which means you cannot use the pen if you want
> to lay your hand on the multitouch screen like you do when drawing on paper.
>
> I think we could be more intelligent, and at least let the user easily
> choose.
>
> I made a quick'n'dirty test on this, so there would be a indicator icon on
> the toolbar, and some backend logic which dynamically turns off the
> touchscreen when the pen is present. It seems very usable, now you can
> actually draw with the pen. You can check it out @ my blog:
> http://henris42.wordpress.com/2012/03/13/touchscreen-pen/
>
> What do you think - should this kind of functionality be part of Unity?
>
> Cheers,
> //HS
>
>
>
>
>
>
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