Package org.jmol.multitouch.sparshui

Class TwoPointGesture

java.lang.Object
org.jmol.multitouch.sparshui.TwoPointGesture
All Implemented Interfaces:
com.sparshui.gestures.Gesture
public class TwoPointGesture extends Object implements com.sparshui.gestures.Gesture
TWO_POINT_GESTURE This gesture requires two points of contact, but its type is not initially defined. Instead, its type is determined on-the-fly to be one of ZOOM, ROTATE, or 2-point DRAG based on the direction of motion and relative positions of the starting points. Two traces are obtained, assuming nothing about the ID of the incoming points from the input device but instead operating from position on the screen. v00 from pt(1,0) to pt(2,0) ZOOM IN: <---- x -----> (at any angle) ZOOM OUT: ----> x <----- (at any angle) ROTATE CW: ^ | | x | (at any angle, not implemented) | V ROTATE CCW: | ^ | x | (at any angle, not implemented) V | 2-point drag: ---------> x (any direction) ---------> Bob Hanson 12/13/2009

  • Field Details

    • _myType

      private int _myType

    • _offset

      protected com.sparshui.common.Location _offset

    • _offsetCentroid

      protected com.sparshui.common.Location _offsetCentroid

    • _traces1

      private List<com.sparshui.common.Location> _traces1

    • _traces2

      private List<com.sparshui.common.Location> _traces2

    • _id1

      private int _id1

    • _id2

      private int _id2

    • _nTraces

      private int _nTraces

    • _scale

      private float _scale

    • _rotation

      private float _rotation

    • time

      private long time

  • Constructor Details

    • TwoPointGesture

      public TwoPointGesture()

  • Method Details

    • getName

      public String getName()
      Description copied from interface: com.sparshui.gestures.Gesture
      Get the name of this gesture.
      Specified by:
      getName in interface com.sparshui.gestures.Gesture
      Returns:
      The name of this gesture.

    • getGestureType

      public int getGestureType()
      Description copied from interface: com.sparshui.gestures.Gesture
      Get the integer value of this gesture type. Gesture values are defined in GestureType.java.
      Specified by:
      getGestureType in interface com.sparshui.gestures.Gesture
      Returns:
      The gesture type.

    • processChange

      public List<com.sparshui.common.Event> processChange(List<com.sparshui.server.TouchPoint> touchPoints, com.sparshui.server.TouchPoint changedPoint)
      Description copied from interface: com.sparshui.gestures.Gesture
      Process a touch point change in the gesture.
      Specified by:
      processChange in interface com.sparshui.gestures.Gesture
      Parameters:
      touchPoints - The list of touch points that currently belong to this gesture.
      changedPoint - The touch point that has changed.
      Returns:
      An ArrayList of events that will be delivered to the client.

    • processChangeSync

      private List<com.sparshui.common.Event> processChangeSync(com.sparshui.server.TouchPoint changedPoint)

    • processBirth

      protected List<com.sparshui.common.Event> processBirth(com.sparshui.server.TouchPoint touchPoint)

    • processDeath

      protected List<com.sparshui.common.Event> processDeath(com.sparshui.server.TouchPoint touchPoint)

    • processMove

      protected List<com.sparshui.common.Event> processMove(com.sparshui.server.TouchPoint touchPoint)

    • updateLocations

      private boolean updateLocations(com.sparshui.server.TouchPoint touchPoint)

    • checkType

      private void checkType()

    • updateParameters

      private boolean updateParameters()