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.

- - - -

+ + + + + +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.

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