GestureEvent - Web APIs 编辑

Non-standard

This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The GestureEvent is a proprietary interface specific to WebKit which gives information regarding multi-touch gestures. Events using this interface include gesturestart, gesturechange, and gestureend.

GestureEvent derives from UIEvent, which in turn derives from Event.

Constructor

GestureEvent()

Creates a GestureEvent object.

Properties

This interface also inherits properties of its parents, UIEvent and Event.

GestureEvent.rotation Read only

Change in rotation (in degrees) since the event's beginning. Positive values indicate clockwise rotation; negative values indicate anticlockwise rotation. Initial value: 0.0

GestureEvent.scale Read only

Distance between two digits since the event's beginning. Expressed as a floating-point multiple of the initial distance between the digits at the beginning of the gesture. Values below 1.0 indicate an inward pinch (zoom out). Values above 1.0 indicate an outward unpinch (zoom in). Initial value: 1.0

Methods

This interface also inherits methods of its parents, UIEvent and Event.

GestureEvent.initGestureEvent()

Initializes the value of an GestureEvent. If the event has already being dispatched, this method does nothing.

Gesture event types

• gesturestart
• gesturechange
• gestureend

Specifications

Not part of any specification. Apple has a description at the Safari Developer Library.

Browser compatibility

BCD tables only load in the browser

See also

• MSGestureEvent
• MSGestureStart
• MSGestureEnd
• MSGestureTap
• MSGestureHold
• MSGestureChange
• MSInertiaStart