On 03/01/2010 03:14 PM, ext Daniel Stone wrote:
And from the NSTouch (OS X) class documentation:
Touches do not have a corresponding screen location. The first touch
of a touch collection is latched to the view underlying the cursor
using the same hit detection as mouse events. Additional touches on
the same device are also latched to the same view as any other
touching touches. A touch remains latched to its view until the
touch has either ended or is cancelled.
Very quickly, since I forgot to mention it in my original reply:
Bear in mind that this documentation is for OS X, and current Apple hardware
only has multi-touch support via track-pads. There is no touch-screen
hardware running Mac OS X today. It's either iPhone, iPod touch, or the
upcoming iPad. iPhone and iPod touch use a different API than the above,
UITouch instead of NSTouch, which actually does give on-screen locations (iirc).
The multi-focii discussions really only apply to multi-touch capable touch
screens, not to laptop track-pads or external multi-touch capable tablets
like some (all?) of the Wacom Bamboo tablets.
--
Bradley T. Hughes (Nokia-D-Qt/Oslo), bradley.hughes at nokia.com
Sandakervn. 116, P.O. Box 4332 Nydalen, 0402 Oslo, Norway
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