diff -r d4524d6a4472 -r 5072524fcc79 Symbian3/PDK/Source/GUID-17C64C2F-9426-4B41-9F0A-23060289D644.dita --- a/Symbian3/PDK/Source/GUID-17C64C2F-9426-4B41-9F0A-23060289D644.dita Wed Jun 16 10:24:13 2010 +0100 +++ b/Symbian3/PDK/Source/GUID-17C64C2F-9426-4B41-9F0A-23060289D644.dita Fri Jul 02 12:51:36 2010 +0100 @@ -1,88 +1,98 @@ - - - - - -Multi-touch -

Multi-touch is an enhancement to the touch screen, which provides -the user with the ability to apply elaborate finger gestures onto -the display as commands to the device.

-

Multi-touch is implemented based on the size and type of interfaces. -When a finger or an object touches the display causing the light to -scatter, the reflection is caught by the sensors. The response for -the touch is sent back based on the type of reflection measured.

-

Only the devices with multi-touch support have 'Pinch Stroke' as -a touch stroke.

-
Pinch -StrokePinch stroke is invoked by two separate but simultaneously -active touch down events and dragging movements along the line that -goes through both touch down points. On release, the pinch in or pinch -out state is maintained. Pinch stroke can be utilized, for example, -in Photo viewer to zoom in and zoom out. - -

The following table lists the default touch-events for pinch-stroke:

Default -touch events for pinch-stroke - - - -

User action

 -

State change

 -

Feedback

 - - - - -

First touch down

 -

No action.

 -

Tactile:

    -

  • First touch down tactile feedback follows the context-based -feedback.

    • -

  • Audio feedback is provided with touch down.

    • -

 - - -

Second simultaneous touch down

 -

Activates multi-touch mode for the content defined.

 -

Tactile:

    -

  • When second finger is touched down multi-touch recognition, -two sensitive pulses effect is provided.

    • -

  • Audio feedback is provided with touch down.

    • -

 - - -

Pinch in

 -

Moving the touch points (directly) closer to each other -is recognized as pinch in. Application can use it, for example, for -zooming out a picture. The behavior should be in relation to the speed -and size of the stroke.

 -

Tactile: Smooth pinch effect is provided while moving the -fingers.

No audio feedback is provided.

 - - -

Pinch out

 -

Moving the touch points (directly) away from each other -is recognized as pinch out. Application can use it, for example, for -zooming in a picture. The behavior should be in relation to the speed -and size of the stroke.

 -

Tactile: Smooth pinch effect is provided while moving the -fingers.

No audio feedback is provided.

 - - -

Touch release

 -

Releasing one or both fingers stops the pinch.

 -

No tactile or audio feedback given.

 - - - -
-
Using multi-touch in applicationsFor multi-touch, -use classes TRawEvent and TAdvancedPointerEvent (which extends TPointerEvent). For more information, -see Advanced -pointers section.
- \ No newline at end of file + + + + +Mu<?Pub Caret?>ltiple touch + + + + +

Multiple touch is an enhancement to the touch screen, which provides +the user with the ability to apply elaborate finger gestures onto +the display as commands to the device.

+

Multiple touch is implemented based on the size and type of interfaces. +When a finger or an object touches the display causing the light to +scatter, the reflection is caught by the sensors. The response for +the touch is sent back based on the type of reflection measured.

+

Only the devices with multiple touch support have 'Pinch Stroke' +as a touch stroke.

+
Pinch +StrokePinch stroke is invoked by two separate but simultaneously +active touch down events and dragging movements along the line that +goes through both touch down points. On release, the pinch in or pinch +out state is maintained. Pinch stroke can be utilized, for example, +in Photo viewer to zoom in and zoom out.

The following table lists the +default touch-events for pinch-stroke:

+Default touch events for pinch-stroke + + + +

User action

 +

State change

 +

Feedback

 + + + + +

First touch down

 +

No action.

 +

Tactile:

    +

  • First touch down tactile feedback follows the context-based +feedback.

    • +

  • Audio feedback is provided with touch down.

    • +

 + + +

Second simultaneous touch down

 +

Activates multiple touch mode for the content defined.

 +

Tactile:

    +

  • When second finger is touched down, two sensitive pulses effect +is provided.

    • +

  • Audio feedback is provided with touch down.

    • +

 + + +

Pinch in

 +

Moving the touch points (directly) closer to each other +is recognized as pinch in. Application can use it, for example, for +zooming out a picture. The behavior should be in relation to the speed +and size of the stroke.

 +

Tactile: Smooth pinch effect is provided while moving the +fingers.

No audio feedback is provided.

 + + +

Pinch out

 +

Moving the touch points (directly) away from each other +is recognized as pinch out. Application can use it, for example, for +zooming in a picture. The behavior should be in relation to the speed +and size of the stroke.

 +

Tactile: Smooth pinch effect is provided while moving the +fingers.

No audio feedback is provided.

 + + +

Touch release

 +

Releasing one or both fingers stops the pinch.

 +

No tactile or audio feedback given.

 + + + +
+
Using +multiple touch in applicationsFor multiple touch, use classes TRawEvent and TAdvancedPointerEvent (which extends TPointerEvent). For more information, see Advanced pointers section.
+ + +