Win7 Multi Touch

The Windows® 7 Developer Experience (mt)
Microsoft® Corporation

Windows 7 Multi-Touch
the future is Here!

The past drives the future.

Input Devices
How many people here use a mouse?
When was it invented?
1963 !!! by Douglas Englebart
When was it first (widely) used?
Mid 90’sWhile Xerox put out a computer with a mouse in 1982 and others slowly followed, it was not until the MID 90’s that mice were widely used on the computer (30 YEARS!!!)

Input Devices
How many people here use a touch screen?
When was it invented?
1972 !!! The PLATO IV (Research Scientists At University of Illinois)

Multi-touch through the years
1985: Sensor Frame (Carnegie Mellon University)
1992: Flip Keyboard
1995/97: Active Desk

Multi-touch through the years
1999: Portfolio Wall
2005: PlayAnywhere
2007: Microsoft Surface Computing

Gestures
1983: Video Place / Video Desk (Myron Krueger) Essentially “wrote the book” in terms of unencumbered (i.e., no gloves, mice, styli, etc.) rich gestural interaction.

Touch History
About the same time the
mac came out

Touch Phones
2006: Synaptics & Pilotfish (San Jose) http://www.synaptics.com
2007: Apple iPhone
1992: Simon (IBM & Bell South) The first touch phone

“So how can I play with this now??”

3 things to know….
the screens
the hardware
the software

The Screens

How to touch
ResistiveThink Push Down and drag

How to touch
CapacitiveThink Electric Impulse

How to touch
InfraredThink laser pointer(s)

The Hardware

Hardware
Capacitive
HP Touchsmart tx2N-trig (2-10)
Capacitive
Dell LatitudeXT2N-Trig (2-10)
Infrared
HP Touchsmart IQ816
NewWindow(2)

The Software

Multi-Touch Development TiersGood – Better – Best
Windows application can target one of three levels of touch integration
Good: No specific touch APIs are used but the application UI is appropriately sized and works well with the built-in gestures
Better: The gesture APIs are supported to give smooth natural interactions
Best: Deep touch-focused experiences designed to take advantage of multi-touch features

WM_Touch – WM_Gesture

Windows7.Multitouch
Easy
to
Write
code
now
PC’s, Form Factors, Technology
Windows7.Multitouch.WPF
WM_Touch

Massive Multi-touch, Multi-user
Easier to Write code soon
PC’s, Form Factors, Technology

The API
protected event EventHandler<WMTouchEventArgs> Touchdown; // touch down event handler
protected event EventHandler<WMTouchEventArgs> Touchup; // touch up event handler
protected event EventHandler<WMTouchEventArgs> TouchMove; // touch move event handler
// Private data members
private int x; // touch x client coordinate in pixels
private int y; // touch y client coordinate in pixels
private int id; // contact ID
private int mask; // mask which fields in the structure are valid
private int flags; // flags
private int time; // touch event time
private intcontactX; // x size of the contact area in pixels
private intcontactY; // y size of the contact area in pixels

Working with MultiTouch
demo

More Information
Multi-Touch Systems that I Have Known and Loved
http://www.billbuxton.com/multitouchOverview.html
Mike Taulty’s Blog http://bit.ly/NKVTN
Example Photo App http://bit.ly/d4eE9

Multi-touch is not new
1972: PLATO IV Touch Screen Terminal
Windows 7 Multi-touch
Touchable Hologram
Present
Future
(http://bit.ly/akq7V)
Past

The
End(or a new beginning)

Lightning Rod
Franklin Stove
Odometer

Leonardo Da Vinci
Helecopter
Eight Barrel
Machine Gun
Parachute

Thomas Edison
Phonograph
Film Projector
Light Bulb

George Jetson

Jet packs

Big Flatscreen TV's

Robot Housekeepers

Guestures and Movement
What can I do?

Predefined Gestures – Translate
Place two fingers in the application window and drag in the direction you want

Zoom and Rotate
Rotate
Touch the image with two fingers and turn fingers in a circle
Zoom
Touch the image with two fingers and move them closer or further apart

Two Finger Tapand Finger Roll
Two Finger Tap
Tap once with both fingers
Finger Roll
Place one finger on the screen, place second finger on the screen, lift the second finger, and then lift the first finger

Manipulations
Manipulations are a great foundation for touch-optimized experiences. They are:
2D affine transformations (translate, scale, rotate)
Superset of supported gestures
Supports multiple concurrent manipulations
Need a source of raw data: WM_TOUCH
Similar to Surface APIs
Interfaces:
IManipulationProcessor
IManipulationEvents

Inertia
Provides basic physics
Works hand in hand with manipulations
Interfaces:
IInertiaProcessor
IManipulationEvents – Same event interface as manipulations

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Win7 Multi Touch

by Daniel Egan on Sep 11, 2009

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