diff --git a/src/org/ntlab/deltaViewer/CollaborationViewer.java b/src/org/ntlab/deltaViewer/CollaborationViewer.java
new file mode 100644
index 0000000..16e1d4f
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+++ b/src/org/ntlab/deltaViewer/CollaborationViewer.java
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+package org.ntlab.deltaViewer;
+
+import java.awt.BorderLayout;
+import java.awt.Dimension;
+import java.awt.Graphics2D;
+import java.awt.geom.Path2D;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+
+import javax.swing.JPanel;
+
+import org.jgrapht.graph.DefaultEdge;
+import org.jgrapht.graph.DirectedWeightedPseudograph;
+import org.ntlab.deltaExtractor.Alias;
+import org.ntlab.deltaExtractor.ExtractedStructure;
+
+import com.mxgraph.canvas.mxGraphics2DCanvas;
+import com.mxgraph.model.mxCell;
+import com.mxgraph.shape.mxConnectorShape;
+import com.mxgraph.shape.mxIShape;
+import com.mxgraph.swing.mxGraphComponent;
+import com.mxgraph.swing.view.mxInteractiveCanvas;
+import com.mxgraph.util.mxConstants;
+import com.mxgraph.util.mxPoint;
+import com.mxgraph.util.mxUtils;
+import com.mxgraph.view.mxCellState;
+import com.mxgraph.view.mxGraphView;
+
+public class CollaborationViewer extends MagnetRONViewer {
+	private IObjectCallGraph objectCallGraph;
+	private DeltaAliasCollector deltaAliasCollector;
+	
+	private static Dimension VERTEX_OBJECT_SIZE = new Dimension(70, 70);
+	private static Dimension VERTEX_METHOD_EXECUTION_SIZE = new Dimension(55, 20);
+
+	private double scale = 1;
+	
+	public CollaborationViewer() {
+		super();
+	}
+	
+	public void init(IObjectCallGraph objectCallGraph, DeltaAliasCollector deltaAliasCollector) {
+		this.objectCallGraph = objectCallGraph;
+		this.deltaAliasCollector = deltaAliasCollector;
+	}
+
+	/** Initialize JFrame, make vertex object and edge object. */
+	public void initAnimation() {
+		// Build a frame, create a graph, and add the graph to the frame so you can actually see the graph.
+		createObjectVertices(objectCallGraph);
+		createEdgeToObject(deltaAliasCollector.getAliasList());
+
+		// Fit graph size in visible JFrame.
+		mxGraphView view = mxgraphComponent.getGraph().getView();
+		int componentWidth = mxgraphComponent.getWidth() - 25;
+		double viewWidth = (double) view.getGraphBounds().getWidth();
+
+//		Object component = mxgraph.insertDeltaVertex(mxDefaultParent, "component", "component", "fillColor=white"); //creates a white vertex.
+//		((mxICell)component).getGeometry().setX(mxgraphComponent.getWidth() - 30);
+//		((mxICell)component).getGeometry().setY(10);
+//		Object vertex = mxgraph.insertDeltaVertex(mxDefaultParent, "view", "view", "fillColor=white"); //creates a white vertex.
+//		((mxICell)vertex).getGeometry().setX(view.getGraphBounds().getWidth());
+//		((mxICell)vertex).getGeometry().setY(10);
+
+//		scale = (double)componentWidth/viewWidth;
+		System.out.println(", " + scale);
+//		scale = 1.5;
+		view.setScale(scale);
+		deltaAnimation.setScale(scale);
+		update();
+	}
+	
+	private void createObjectVertices(IObjectCallGraph objectCallGraph) {
+		// TODO Auto-generated method stub
+		
+	}
+
+	private void createEdgeToObject(List<Alias> aliasList) {
+		// TODO Auto-generated method stub
+		
+	}
+
+	/**
+	 * Step to animation of specified alias. 
+	 * 
+	 * @param alias Alias type and occurrence point etc.
+	 */
+	public void stepToAnimation(Alias alias) {
+		try {
+			stepToAnimation(deltaAliasCollector.getAliasList().indexOf(alias));
+		} catch (IndexOutOfBoundsException e) {
+			stepToAnimation(-1);	
+		}
+	}
+
+	/**
+	 * Parent : Step to animation of specified numFrame.
+	 * 
+	 * @param numFrame Current animation frame.
+	 */
+	public void stepToAnimation(int numFrame) {
+	}
+	
+
+}