plugins/dali-script-v8/docs/content/pan-gesture-detector.js

   1 /**
   2  *
   3 ## PanGestureDetector API
   4
   5
   6 PanGestureDetector analyse a stream of touch events and looks for panning (or dragging) gestures.
   7 If an actor is attached to the pan gesture detector, the detector will emit a detected signal to
   8 the application when it recognises a pan gesture on the attached actor in its analysis.
   9
  10 ### Simple example
  11
  12 ```
  13 // Create a pan gesture detector
  14 var panGestureDetector = new dali.PanGestureDetector();
  15
  16 var actor = new dali.Actor();
  17 dali.stage.add(actor);
  18
  19 // Attach an actor to the detector
  20 panGestureDetector.attach(actor);
  21
  22 // Connect the detected signal
  23 panGestureDetector.on("panDetected", onPan);
  24
  25 onPan = function(actor, panGesture)
  26 {
  27     log("Pan gesture state: " + panGesture.state + ", number of touches: " + panGesture.numberOfTouches + ", time stamp: " + panGesture.time + "\n");
  28     log("local position: " + panGesture.position.x + ", " + panGesture.position.y + "\n");
  29     log("local displacement: " + panGesture.displacement.x + ", " + panGesture.displacement.y + "\n");
  30     log("local velocity: " + panGesture.velocity.x + ", " + panGesture.velocity.y + "\n");
  31     log("screen position: " + panGesture.screenPosition.x + ", " + panGesture.screenPosition.y + "\n");
  32     log("screen displacement: " + panGesture.screenDisplacement.x + ", " + panGesture.screenDisplacement.y + "\n");
  33     log("screen velocity: " + panGesture.screenVelocity.x + ", " + panGesture.screenVelocity.y + "\n");
  34 }
  35
  36 // Detach the actor from the detector
  37 panGestureDetector.detach(actor);
  38 ```
  39 @class PanGestureDetector
  40
  41 */