Adding a PinchZoom control for smooth zooming on multi-touch devices. p=bbinet,me r=crschmidt (closes #3105)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@11544 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Handler/Pinch.js

@@ -120,13 +120,15 @@ OpenLayers.Handler.Pinch = OpenLayers.Class(OpenLayers.Handler, {
      * {Boolean} Let the event propagate.
      */
     touchmove: function(evt) {
+        var propagate = true;
         if (this.started && OpenLayers.Event.isMultiTouch(evt)) {
             this.pinching = true;
             var current = this.getPinchData(evt);
             this.callback("move", [evt, current]);
             this.last = current;
+            propagate = false;
         }
-        return true;
+        return propagate;
     },
 
     /**
@@ -140,14 +142,16 @@ OpenLayers.Handler.Pinch = OpenLayers.Class(OpenLayers.Handler, {
      * {Boolean} Let the event propagate.
      */
     touchend: function(evt) {
+        var propagate = true;
         if (this.started) {
             this.started = false;
             this.pinching = false;
             this.callback("done", [evt, this.start, this.last]);
             this.start = null;
             this.last = null;
+            propagate = false;
         }
-        return true;
+        return propagate;
     },
 
     /**