multi-touch-dev team mailing list archive

["Henrik Rydberg" <rydberg@xxxxxxxxxxx>]

On Mon, Feb 07, 2011 at 02:23:24PM +0000, Mark Shuttleworth wrote:
> On 07/02/11 11:20, Henrik Rydberg wrote:
> > There is an important difference in the handling of prolonged gestures
> > in this environment, which seems to imply that not all basic
> > application gesture needs can be met with this approach.
> >
> > With the maverick X drivers (synaptics and multitouch), it is natural
> > to position the cursor with one finger, and then add another finger to
> > scroll a bit, life one finger to position the cursor again, and so
> > on. The same goes for zooming, where one first positions the cursor,
> > then zooms at that point.
> >
> > With the new natty XI2.1 packages, the gesture engine releases control
> > over a touch based on a timeout, passing it on to the application in
> > such a way that the modus operandi described above no longer is
> > possible. In practise, one might need to view the server-side
> > recognition as dedicated to system gestures, and instead reimplement
> > the current application behavior on the client side.
> 
> This is a function of the fact that you can do two very different things
> with your finger: move the pointer, or interact with content/gesture. I
> think we could special case that in pointer-based environments like the
> desktop, so that single-finger pointer moving actions come to an end
> when additional fingers are brought to bear, at which point a gesture is
> begun. Would that address the issue?

Yes, it would, and I think it will suffice. Thank you, Mark.

Henrik