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diff --git a/src/js/layout/mxStackLayout.js b/src/js/layout/mxStackLayout.js
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+/**
+ * $Id: mxStackLayout.js,v 1.47 2012-12-14 08:54:34 gaudenz Exp $
+ * Copyright (c) 2006-2010, JGraph Ltd
+ */
+/**
+ * Class: mxStackLayout
+ * 
+ * Extends <mxGraphLayout> to create a horizontal or vertical stack of the
+ * child vertices. The children do not need to be connected for this layout
+ * to work.
+ * 
+ * Example:
+ * 
+ * (code)
+ * var layout = new mxStackLayout(graph, true);
+ * layout.execute(graph.getDefaultParent());
+ * (end)
+ * 
+ * Constructor: mxStackLayout
+ * 
+ * Constructs a new stack layout layout for the specified graph,
+ * spacing, orientation and offset.
+ */
+function mxStackLayout(graph, horizontal, spacing, x0, y0, border)
+{
+	mxGraphLayout.call(this, graph);
+	this.horizontal = (horizontal != null) ? horizontal : true;
+	this.spacing = (spacing != null) ? spacing : 0;
+	this.x0 = (x0 != null) ? x0 : 0;
+	this.y0 = (y0 != null) ? y0 : 0;
+	this.border = (border != null) ? border : 0;
+};
+
+/**
+ * Extends mxGraphLayout.
+ */
+mxStackLayout.prototype = new mxGraphLayout();
+mxStackLayout.prototype.constructor = mxStackLayout;
+
+/**
+ * Variable: horizontal
+ *
+ * Specifies the orientation of the layout. Default is true.
+ */
+mxStackLayout.prototype.horizontal = null;
+
+/**
+ * Variable: spacing
+ *
+ * Specifies the spacing between the cells. Default is 0.
+ */
+mxStackLayout.prototype.spacing = null;
+
+/**
+ * Variable: x0
+ *
+ * Specifies the horizontal origin of the layout. Default is 0.
+ */
+mxStackLayout.prototype.x0 = null;
+
+/**
+ * Variable: y0
+ *
+ * Specifies the vertical origin of the layout. Default is 0.
+ */
+mxStackLayout.prototype.y0 = null;
+
+/**
+ * Variable: border
+ *
+ * Border to be added if fill is true. Default is 0.
+ */
+mxStackLayout.prototype.border = 0;
+
+/**
+ * Variable: keepFirstLocation
+ * 
+ * Boolean indicating if the location of the first cell should be
+ * kept, that is, it will not be moved to x0 or y0.
+ */
+mxStackLayout.prototype.keepFirstLocation = false;
+
+/**
+ * Variable: fill
+ * 
+ * Boolean indicating if dimension should be changed to fill out the parent
+ * cell. Default is false.
+ */
+mxStackLayout.prototype.fill = false;
+	
+/**
+ * Variable: resizeParent
+ * 
+ * If the parent should be resized to match the width/height of the
+ * stack. Default is false.
+ */
+mxStackLayout.prototype.resizeParent = false;
+
+/**
+ * Variable: resizeLast
+ * 
+ * If the last element should be resized to fill out the parent. Default is
+ * false. If <resizeParent> is true then this is ignored.
+ */
+mxStackLayout.prototype.resizeLast = false;
+
+/**
+ * Variable: wrap
+ * 
+ * Value at which a new column or row should be created. Default is null.
+ */
+mxStackLayout.prototype.wrap = null;
+
+/**
+ * Function: isHorizontal
+ * 
+ * Returns <horizontal>.
+ */
+mxStackLayout.prototype.isHorizontal = function()
+{
+	return this.horizontal;
+};
+
+/**
+ * Function: moveCell
+ * 
+ * Implements <mxGraphLayout.moveCell>.
+ */
+mxStackLayout.prototype.moveCell = function(cell, x, y)
+{
+	var model = this.graph.getModel();
+	var parent = model.getParent(cell);
+	var horizontal = this.isHorizontal();
+	
+	if (cell != null && parent != null)
+	{
+		var i = 0;
+		var last = 0;
+		var childCount = model.getChildCount(parent);
+		var value = (horizontal) ? x : y;
+		var pstate = this.graph.getView().getState(parent);
+
+		if (pstate != null)
+		{
+			value -= (horizontal) ? pstate.x : pstate.y;
+		}
+		
+		for (i = 0; i < childCount; i++)
+		{
+			var child = model.getChildAt(parent, i);
+			
+			if (child != cell)
+			{
+				var bounds = model.getGeometry(child);
+				
+				if (bounds != null)
+				{
+					var tmp = (horizontal) ?
+						bounds.x + bounds.width / 2 :
+						bounds.y + bounds.height / 2;
+					
+					if (last < value && tmp > value)
+					{
+						break;
+					}
+					
+					last = tmp;
+				}
+			}
+		}
+
+		// Changes child order in parent
+		var idx = parent.getIndex(cell);
+		idx = Math.max(0, i - ((i > idx) ? 1 : 0));
+
+		model.add(parent, cell, idx);
+	}
+};
+
+/**
+ * Function: getParentSize
+ * 
+ * Returns the size for the parent container or the size of the graph
+ * container if the parent is a layer or the root of the model.
+ */
+mxStackLayout.prototype.getParentSize = function(parent)
+{
+	var model = this.graph.getModel();			
+	var pgeo = model.getGeometry(parent);
+	
+	// Handles special case where the parent is either a layer with no
+	// geometry or the current root of the view in which case the size
+	// of the graph's container will be used.
+	if (this.graph.container != null && ((pgeo == null &&
+		model.isLayer(parent)) || parent == this.graph.getView().currentRoot))
+	{
+		var width = this.graph.container.offsetWidth - 1;
+		var height = this.graph.container.offsetHeight - 1;
+		pgeo = new mxRectangle(0, 0, width, height);
+	}
+	
+	return pgeo;
+};
+
+/**
+ * Function: execute
+ * 
+ * Implements <mxGraphLayout.execute>.
+ * 
+ * Only children where <isVertexIgnored> returns false are taken into
+ * account.
+ */
+mxStackLayout.prototype.execute = function(parent)
+{
+	if (parent != null)
+	{
+		var horizontal = this.isHorizontal();
+		var model = this.graph.getModel();	
+		var pgeo = this.getParentSize(parent);
+					
+		var fillValue = 0;
+		
+		if (pgeo != null)
+		{
+			fillValue = (horizontal) ? pgeo.height : pgeo.width;
+		}
+		
+		fillValue -= 2 * this.spacing + 2 * this.border;
+		var x0 = this.x0 + this.border;
+		var y0 = this.y0 + this.border;
+		
+		// Handles swimlane start size
+		if (this.graph.isSwimlane(parent))
+		{
+			// Uses computed style to get latest 
+			var style = this.graph.getCellStyle(parent);
+			var start = mxUtils.getValue(style, mxConstants.STYLE_STARTSIZE, mxConstants.DEFAULT_STARTSIZE);
+			var horz = mxUtils.getValue(style, mxConstants.STYLE_HORIZONTAL, true);
+			
+			if (horizontal == horz)
+			{
+				fillValue -= start;
+			}
+			
+			if (horizontal)
+			{
+				y0 += start;
+			}
+			else
+			{
+				x0 += start;
+			}
+		}
+
+		model.beginUpdate();
+		try
+		{
+			var tmp = 0;
+			var last = null;
+			var childCount = model.getChildCount(parent);
+			
+			for (var i = 0; i < childCount; i++)
+			{
+				var child = model.getChildAt(parent, i);
+				
+				if (!this.isVertexIgnored(child) && this.isVertexMovable(child))
+				{
+					var geo = model.getGeometry(child);
+					
+					if (geo != null)
+					{
+						geo = geo.clone();
+						
+						if (this.wrap != null && last != null)
+						{
+							if ((horizontal && last.x + last.width +
+								geo.width + 2 * this.spacing > this.wrap) ||
+								(!horizontal && last.y + last.height +
+								geo.height + 2 * this.spacing > this.wrap))
+							{
+								last = null;
+								
+								if (horizontal)
+								{
+									y0 += tmp + this.spacing;
+								}
+								else
+								{
+									x0 += tmp + this.spacing;
+								}
+								
+								tmp = 0;
+							}	
+						}
+						
+						tmp = Math.max(tmp, (horizontal) ? geo.height : geo.width);
+						
+						if (last != null)
+						{
+							if (horizontal)
+							{
+								geo.x = last.x + last.width + this.spacing;
+							}
+							else
+							{
+								geo.y = last.y + last.height + this.spacing;
+							}
+						}
+						else if (!this.keepFirstLocation)
+						{
+							if (horizontal)
+							{
+								geo.x = x0;
+							}
+							else
+							{
+								geo.y = y0;
+							}
+						}
+						
+						if (horizontal)
+						{
+							geo.y = y0;
+						}
+						else
+						{
+							geo.x = x0;
+						}
+						
+						if (this.fill && fillValue > 0)
+						{
+							if (horizontal)
+							{
+								geo.height = fillValue;
+							}
+							else
+							{
+								geo.width = fillValue;									
+							}
+						}
+						
+						model.setGeometry(child, geo);
+						last = geo;
+					}
+				}
+			}
+			
+			if (this.resizeParent && pgeo != null && last != null &&
+				!this.graph.isCellCollapsed(parent))
+			{
+				pgeo = pgeo.clone();
+				
+				if (horizontal)
+				{
+					pgeo.width = last.x + last.width + this.spacing;
+				}
+				else
+				{
+					pgeo.height = last.y + last.height + this.spacing;
+				}
+				
+				model.setGeometry(parent, pgeo);					
+			}
+			else if (this.resizeLast && pgeo != null && last != null)
+			{
+				if (horizontal)
+				{
+					last.width = pgeo.width - last.x - this.spacing;
+				}
+				else
+				{
+					last.height = pgeo.height - last.y - this.spacing;
+				}
+			}
+		}
+		finally
+		{
+			model.endUpdate();
+		}
+	}
+};