Package com.openinventor.inventor.gestures.events

Class SoScaleGestureEvent

java.lang.Object

com.openinventor.inventor.Inventor

com.openinventor.inventor.events.SoEvent

com.openinventor.inventor.gestures.events.SoGestureEvent

com.openinventor.inventor.gestures.events.SoScaleGestureEvent

public class SoScaleGestureEvent
extends SoGestureEvent

Class for scale (pinch) gesture events. SoScaleGestureEvent represents a pinch gesture in the Open Inventor event model. Touch events are analyzed by a SoScaleGestureRecognizer. When a scale gesture is recognized, the recognizer generates this event. The gesture begins with a BEGIN state event. DELTA state events are generated until the end of the gesture which generates an END state event. See SoGestureEvent.getGestureState().

Note:

• In order to get touch events for the gesture recognizer(s) to recognize, the application must explicitly register a touch screen device (
  invalid reference

  SoWinTouchScreen

  ,
  invalid reference

  SoQtTouchScreen

  , etc).
• In order to get gesture events, the application must explicitly register gesture recognizers with the touch screen device's touch manager (SoTouchManager).

See Also:

• SoEvent
• SoGestureEvent
• SoDoubleTapGestureEvent
• SoLongTapGestureEvent
• SoRotateGestureEvent
• SoScaleGestureRecognizer

Nested Class Summary

Nested classes/interfaces inherited from class com.openinventor.inventor.gestures.events.SoGestureEvent

SoGestureEvent.GestureStates

Nested classes/interfaces inherited from class com.openinventor.inventor.Inventor

Inventor.ConstructorCommand

Field Summary

Fields inherited from class com.openinventor.inventor.Inventor

VERBOSE_LEVEL, ZeroHandle

Constructor Summary

Constructors

Constructor	Description
SoScaleGestureEvent()	Constructor.

Method Summary

Modifier and Type	Method	Description
float	getDeltaScaleFactor()	Gets the ratio between the current fingers distance and the previous distance.
float	getScaleFactor()	Gets the ratio between the current fingers distance and the first distance evaluated after the second down event.

Methods inherited from class com.openinventor.inventor.gestures.events.SoGestureEvent

getGestureState

Methods inherited from class com.openinventor.inventor.events.SoEvent

getNormalizedPosition, getPosition, getPosition, getPositionFloat, getPositionFloat, getTime, setAltDown, setButton1Down, setCtrlDown, setPosition, setPosition, setShiftDown, setTime, wasAltDown, wasButton1Down, wasCtrlDown, wasShiftDown

Methods inherited from class com.openinventor.inventor.Inventor

dispose, getNativeResourceHandle

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

SoScaleGestureEvent

public SoScaleGestureEvent()

Constructor.

Method Details

getDeltaScaleFactor

public float getDeltaScaleFactor()

Gets the ratio between the current fingers distance and the previous distance.

getScaleFactor

public float getScaleFactor()

Gets the ratio between the current fingers distance and the first distance evaluated after the second down event.