Move some touch logic to the handler base class.

lib/OpenLayers/Handler.js

@@ -85,6 +85,14 @@ OpenLayers.Handler = OpenLayers.Class({
      *     the OpenLayers code.
      */
     evt: null,
+    
+    /**
+     * Property: touch
+     * {Boolean} Indcates the support of touch events. When touch events are 
+     *     starded touch will be true and all mouse related listeners will do 
+     *     nothing.
+     */
+    touch: false,
 
     /**
      * Constructor: OpenLayers.Handler
@@ -186,10 +194,38 @@ OpenLayers.Handler = OpenLayers.Class({
                 this.unregister(events[i], this[events[i]]); 
             }
         } 
+        this.touch = false;
         this.active = false;
         return true;
     },
 
+    /**
+     * Method: startTouch
+     * Start touch events, this method must be called by subclasses in 
+     *     "touchstart" method. When touch events are starded <touch> will be
+     *     true and all mouse related listeners will do nothing.
+     *
+     * Returns:
+     * {Boolean} The touch events are started.
+     */
+    startTouch: function() {
+        if (this.touch) {
+            return false;
+        } else {
+            this.touch = true;
+            var events = [
+                "mousedown", "mouseup", "mousemove", "click", "dblclick",
+                "mouseout"
+            ];
+            for (var i=0, len=events.length; i<len; i++) {
+                if (this[events[i]]) {
+                    this.unregister(events[i], this[events[i]]); 
+                }
+            } 
+            return true;
+        }
+    },
+
     /**
     * Method: callback
     * Trigger the control's named callback with the given arguments