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diff --git a/src/js/handler/mxPanningHandler.js b/src/js/handler/mxPanningHandler.js
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--- a/src/js/handler/mxPanningHandler.js
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-/**
- * $Id: mxPanningHandler.js,v 1.79 2012-07-17 14:37:41 gaudenz Exp $
- * Copyright (c) 2006-2010, JGraph Ltd
- */
-/**
- * Class: mxPanningHandler
- * 
- * Event handler that pans and creates popupmenus. To use the left
- * mousebutton for panning without interfering with cell moving and
- * resizing, use <isUseLeftButton> and <isIgnoreCell>. For grid size
- * steps while panning, use <useGrid>. This handler is built-into
- * <mxGraph.panningHandler> and enabled using <mxGraph.setPanning>.
- * 
- * Constructor: mxPanningHandler
- * 
- * Constructs an event handler that creates a <mxPopupMenu>
- * and pans the graph.
- *
- * Event: mxEvent.PAN_START
- *
- * Fires when the panning handler changes its <active> state to true. The
- * <code>event</code> property contains the corresponding <mxMouseEvent>.
- *
- * Event: mxEvent.PAN
- *
- * Fires while handle is processing events. The <code>event</code> property contains
- * the corresponding <mxMouseEvent>.
- *
- * Event: mxEvent.PAN_END
- *
- * Fires when the panning handler changes its <active> state to false. The
- * <code>event</code> property contains the corresponding <mxMouseEvent>.
- */
-function mxPanningHandler(graph, factoryMethod)
-{
-	if (graph != null)
-	{
-		this.graph = graph;
-		this.factoryMethod = factoryMethod;
-		this.graph.addMouseListener(this);
-		this.init();
-	}
-};
-
-/**
- * Extends mxPopupMenu.
- */
-mxPanningHandler.prototype = new mxPopupMenu();
-mxPanningHandler.prototype.constructor = mxPanningHandler;
-
-/**
- * Variable: graph
- * 
- * Reference to the enclosing <mxGraph>.
- */
-mxPanningHandler.prototype.graph = null;
-
-/**
- * Variable: usePopupTrigger
- * 
- * Specifies if the <isPopupTrigger> should also be used for panning. To
- * avoid conflicts, the panning is only activated if the mouse was moved
- * more than <mxGraph.tolerance>, otherwise, a single click is assumed
- * and the popupmenu is displayed. Default is true.
- */
-mxPanningHandler.prototype.usePopupTrigger = true;
-
-/**
- * Variable: useLeftButtonForPanning
- * 
- * Specifies if panning should be active for the left mouse button.
- * Setting this to true may conflict with <mxRubberband>. Default is false.
- */
-mxPanningHandler.prototype.useLeftButtonForPanning = false;
-
-/**
- * Variable: selectOnPopup
- * 
- * Specifies if cells should be selected if a popupmenu is displayed for
- * them. Default is true.
- */
-mxPanningHandler.prototype.selectOnPopup = true;
-
-/**
- * Variable: clearSelectionOnBackground
- * 
- * Specifies if cells should be deselected if a popupmenu is displayed for
- * the diagram background. Default is true.
- */
-mxPanningHandler.prototype.clearSelectionOnBackground = true;
-
-/**
- * Variable: ignoreCell
- * 
- * Specifies if panning should be active even if there is a cell under the
- * mousepointer. Default is false.
- */
-mxPanningHandler.prototype.ignoreCell = false;
-
-/**
- * Variable: previewEnabled
- * 
- * Specifies if the panning should be previewed. Default is true.
- */
-mxPanningHandler.prototype.previewEnabled = true;
-
-/**
- * Variable: useGrid
- * 
- * Specifies if the panning steps should be aligned to the grid size.
- * Default is false.
- */
-mxPanningHandler.prototype.useGrid = false;
-
-/**
- * Variable: panningEnabled
- * 
- * Specifies if panning should be enabled. Default is true.
- */
-mxPanningHandler.prototype.panningEnabled = true;
-
-/**
- * Function: isPanningEnabled
- * 
- * Returns <panningEnabled>.
- */
-mxPanningHandler.prototype.isPanningEnabled = function()
-{
-	return this.panningEnabled;
-};
-
-/**
- * Function: setPanningEnabled
- * 
- * Sets <panningEnabled>.
- */
-mxPanningHandler.prototype.setPanningEnabled = function(value)
-{
-	this.panningEnabled = value;
-};
-
-/**
- * Function: init
- * 
- * Initializes the shapes required for this vertex handler.
- */
-mxPanningHandler.prototype.init = function()
-{
-	// Supercall
-	mxPopupMenu.prototype.init.apply(this);
-
-	// Hides the tooltip if the mouse is over
-	// the context menu
-	mxEvent.addListener(this.div, (mxClient.IS_TOUCH) ? 'touchmove' : 'mousemove',
-		mxUtils.bind(this, function(evt)
-		{
-			this.graph.tooltipHandler.hide();
-		})
-	);
-};
-
-/**
- * Function: isPanningTrigger
- * 
- * Returns true if the given event is a panning trigger for the optional
- * given cell. This returns true if control-shift is pressed or if
- * <usePopupTrigger> is true and the event is a popup trigger.
- */
-mxPanningHandler.prototype.isPanningTrigger = function(me)
-{
-	var evt = me.getEvent();
-	
-	return (this.useLeftButtonForPanning && (this.ignoreCell || me.getState() == null) &&
-			mxEvent.isLeftMouseButton(evt)) || (mxEvent.isControlDown(evt) &&
-			mxEvent.isShiftDown(evt)) || (this.usePopupTrigger &&
-		   	mxEvent.isPopupTrigger(evt));
-};
-
-/**
- * Function: mouseDown
- * 
- * Handles the event by initiating the panning. By consuming the event all
- * subsequent events of the gesture are redirected to this handler.
- */
-mxPanningHandler.prototype.mouseDown = function(sender, me)
-{
-	if (!me.isConsumed() && this.isEnabled())
-	{
-		// Hides the popupmenu if is is being displayed
-		this.hideMenu();
-
-		this.dx0 = -this.graph.container.scrollLeft;
-		this.dy0 = -this.graph.container.scrollTop;
-		
-		// Checks the event triggers to panning and popupmenu
-		this.popupTrigger = this.isPopupTrigger(me);
-		this.panningTrigger = this.isPanningEnabled() &&
-			this.isPanningTrigger(me);
-
-		// Stores the location of the trigger event
-		this.startX = me.getX();
-		this.startY = me.getY();
-		
-		// Displays popup menu on Mac after the mouse was released
-		if (this.panningTrigger)
-		{
-			this.consumePanningTrigger(me);
-		}
-	}
-};
-
-/**
- * Function: consumePanningTrigger
- * 
- * Consumes the given <mxMouseEvent> if it was a panning trigger in
- * <mouseDown>. The default is to invoke <mxMouseEvent.consume>. Note that this
- * will block any further event processing. If you haven't disabled built-in
- * context menus and require immediate selection of the cell on mouseDown in
- * Safari and/or on the Mac, then use the following code:
- * 
- * (code)
- * mxPanningHandler.prototype.consumePanningTrigger = function(me)
- * {
- *   if (me.evt.preventDefault)
- *   {
- *     me.evt.preventDefault();
- *   }
- *   
- *   // Stops event processing in IE
- *   me.evt.returnValue = false;
- *   
- *   // Sets local consumed state
- *   if (!mxClient.IS_SF && !mxClient.IS_MAC)
- *   {
- *     me.consumed = true;
- *   }
- * };
- * (end)
- */
-mxPanningHandler.prototype.consumePanningTrigger = function(me)
-{
-	me.consume();
-};
-
-/**
- * Function: mouseMove
- * 
- * Handles the event by updating the panning on the graph.
- */
-mxPanningHandler.prototype.mouseMove = function(sender, me)
-{
-	var dx = me.getX() - this.startX;
-	var dy = me.getY() - this.startY;
-	
-	if (this.active)
-	{
-		if (this.previewEnabled)
-		{
-			// Applies the grid to the panning steps
-			if (this.useGrid)
-			{
-				dx = this.graph.snap(dx);
-				dy = this.graph.snap(dy);
-			}
-			
-			this.graph.panGraph(dx + this.dx0, dy + this.dy0);
-		}
-
-		this.fireEvent(new mxEventObject(mxEvent.PAN, 'event', me));
-		me.consume();
-	}
-	else if (this.panningTrigger)
-	{
-		var tmp = this.active;
-
-		// Panning is activated only if the mouse is moved
-		// beyond the graph tolerance
-		this.active = Math.abs(dx) > this.graph.tolerance ||
-			Math.abs(dy) > this.graph.tolerance;
-
-		if (!tmp && this.active)
-		{
-			this.fireEvent(new mxEventObject(mxEvent.PAN_START, 'event', me));
-		}
-	}
-};
-
-/**
- * Function: mouseUp
- * 
- * Handles the event by setting the translation on the view or showing the
- * popupmenu.
- */
-mxPanningHandler.prototype.mouseUp = function(sender, me)
-{
-	// Shows popup menu if mouse was not moved
-	var dx = Math.abs(me.getX() - this.startX);
-	var dy = Math.abs(me.getY() - this.startY);
-
-	if (this.active)
-	{
-		if (!this.graph.useScrollbarsForPanning || !mxUtils.hasScrollbars(this.graph.container))
-		{
-			dx = me.getX() - this.startX;
-			dy = me.getY() - this.startY;
-			
-			// Applies the grid to the panning steps
-			if (this.useGrid)
-			{
-				dx = this.graph.snap(dx);
-				dy = this.graph.snap(dy);
-			}
-			
-			var scale = this.graph.getView().scale;
-			var t = this.graph.getView().translate;
-			
-			this.graph.panGraph(0, 0);
-			this.panGraph(t.x + dx / scale, t.y + dy / scale);
-		}
-		
-		this.active = false;
-		this.fireEvent(new mxEventObject(mxEvent.PAN_END, 'event', me));
-		me.consume();
-	}
-	else if (this.popupTrigger)
-	{
-		if (dx < this.graph.tolerance && dy < this.graph.tolerance)
-		{
-			var cell = this.getCellForPopupEvent(me);
-			
-			// Selects the cell for which the context menu is being displayed
-			if (this.graph.isEnabled() && this.selectOnPopup &&
-				cell != null && !this.graph.isCellSelected(cell))
-			{
-				this.graph.setSelectionCell(cell);
-			}
-			else if (this.clearSelectionOnBackground && cell == null)
-			{
-				this.graph.clearSelection();
-			}
-			
-			// Hides the tooltip if there is one
-			this.graph.tooltipHandler.hide();
-			var origin = mxUtils.getScrollOrigin();
-			var point = new mxPoint(me.getX() + origin.x,
-				me.getY() + origin.y);
-			
-			// Menu is shifted by 1 pixel so that the mouse up event
-			// is routed via the underlying shape instead of the DIV
-			this.popup(point.x + 1, point.y + 1, cell, me.getEvent());
-			me.consume();
-		}
-	}
-	
-	this.panningTrigger = false;
-	this.popupTrigger = false;
-};
-
-/**
- * Function: getCellForPopupEvent
- * 
- * Hook to return the cell for the mouse up popup trigger handling.
- */
-mxPanningHandler.prototype.getCellForPopupEvent = function(me)
-{
-	return me.getCell();
-};
-
-/**
- * Function: panGraph
- * 
- * Pans <graph> by the given amount.
- */
-mxPanningHandler.prototype.panGraph = function(dx, dy)
-{
-	this.graph.getView().setTranslate(dx, dy);
-};
-
-/**
- * Function: destroy
- * 
- * Destroys the handler and all its resources and DOM nodes.
- */
-mxPanningHandler.prototype.destroy = function()
-{
-	this.graph.removeMouseListener(this);
-	
-	// Supercall
-	mxPopupMenu.prototype.destroy.apply(this);
-};