Kinetic now returns directly the pre-render function

instead of returning the kinetic easing function only.

(thanks @fredj)

src/ol/interaction/dragpaninteraction.js

@@ -7,7 +7,6 @@ goog.require('ol.Coordinate');
 goog.require('ol.MapBrowserEvent');
 goog.require('ol.View2D');
 goog.require('ol.ViewHint');
-goog.require('ol.animation');
 goog.require('ol.interaction.ConditionType');
 goog.require('ol.interaction.Drag');
 
@@ -83,11 +82,7 @@ ol.interaction.DragPan.prototype.handleDragEnd = function(mapBrowserEvent) {
     var distance = this.kinetic_.getDistance();
     var angle = this.kinetic_.getAngle();
     var center = view.getCenter();
-    this.kineticPreRenderFn_ = ol.animation.createPanFrom({
+    this.kineticPreRenderFn_ = this.kinetic_.createPanFrom(center);
-      source: center,
-      duration: this.kinetic_.getDuration(),
-      easing: this.kinetic_.getEasingFn()
-    });
     map.addPreRenderFunction(this.kineticPreRenderFn_);
 
     var centerpx = map.getPixelFromCoordinate(center);

src/ol/kinetic.js

@@ -3,6 +3,7 @@ goog.provide('ol.Kinetic');
 
 goog.require('goog.array');
 goog.require('ol.Pixel');
+goog.require('ol.animation');
 
 
 /**
@@ -106,16 +107,22 @@ ol.Kinetic.prototype.end = function() {
 
 
 /**
- * @return {function(number): number} Easing function for kinetic animation.
+ * @param {ol.Coordinate} source Source coordinate for the animation.
+ * @return {ol.PreRenderFunction} Pre-render function for kinetic animation.
  */
-ol.Kinetic.prototype.getEasingFn = function() {
+ol.Kinetic.prototype.createPanFrom = function(source) {
   var decay = this.decay_;
   var v_0 = this.v_0_;
   var v_min = this.v_min_;
   var duration = this.getDuration();
-  return function(t) {
+  var easingFunction = function(t) {
     return v_0 * (Math.exp((decay * t) * duration) - 1) / (v_min - v_0);
   };
+  return ol.animation.createPanFrom({
+    source: source,
+    duration: duration,
+    easing: easingFunction
+  });
 };