#905 - give the drag handler back its start property - controls use but do not modify these handler properties

git-svn-id: http://svn.openlayers.org/trunk/openlayers@3906 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Handler/Drag.js

@@ -40,10 +40,16 @@ OpenLayers.Handler.Drag = OpenLayers.Class(OpenLayers.Handler, {
 
     /** 
      * Property: last
-     * {<OpenLayers.Pixel>} 
+     * {<OpenLayers.Pixel>} The last pixel location of the drag.
      */
     last: null,
 
+    /** 
+     * Property: start
+     * {<OpenLayers.Pixel>} The first pixel location of the drag.
+     */
+    start: null,
+
     /**
      * Property: oldOnselectstart
      * {Function}
@@ -90,6 +96,7 @@ OpenLayers.Handler.Drag = OpenLayers.Class(OpenLayers.Handler, {
         if (this.checkModifiers(evt) && OpenLayers.Event.isLeftClick(evt)) {
             this.started = true;
             this.dragging = false;
+            this.start = evt.xy;
             this.last = evt.xy;
             // TBD replace with CSS classes
             this.map.div.style.cursor = "move";