This is a timely call for interest.
Additionally I would like to sollicit thoughts on the ideal level of
abstraction such event API's should provide.
Some random examples for illustration.
Low level: TouchDown(...) onTouchMove() onTouchUp() with each reporting and
tracking pressure and position of multiple fingers so that "gesture
recognition" can be done in the script
Mid Level: onTap(), onDoubleTap(), onLongTouch(), onDrag(),
onPinch()....position but no pressure reported
High Level: onRotate(), onScroll(), onResize()....gesture reported
The complexity and number of problems to overcome to produce a clean API is
much greater for higher levels of abstraction.
On a related note it would be useful for tablets and smartphones to also
handle other sensors such as accelerometers.... onShake(),
onOrientationChange()
I believe Palm has done some stuff to support this. At a lower level you
can get raw accelerometer data too.
-dave
On Feb 25, 2010 10:00pm, Charles Pritchard <[email protected]> wrote:
Hi All;
I'd like to know if there's room or any work has been done to set aside a
standard for an extended set of pointer-device events.
With touch screens and touch sensitivity becoming quite main-stream,
I'd like to see this popular functionality supported by the HTML 5
standard.
We see, in the iPhone, an ontouchstart and ongesturestart, and company.
Gesture is a nice way of saying multiple inputs, and it works well.
While many people would like to wrap the ontouch events into onmouse
events -- they do have some different semantics. And, I believe
that ontouch would be a good place to add in pressure sensitivity indexes.
So, I thought I'd solicit feedback here.
I'd like a common API to support touch screens
and pressure/angle sensitive touch devices.
I believe that both Apple and Wacom have thrown their hats into the ring,
and we can easily
integrate their achievements.
-Charles
