Update.

src/main/org/insa/algo/weakconnectivity/WeaklyConnectedComponentGraphicObserver.java

@@ -0,0 +1,46 @@
+package org.insa.algo.weakconnectivity;
+
+import java.awt.Color;
+import java.util.ArrayList;
+
+import org.insa.drawing.Drawing;
+import org.insa.drawing.graph.GraphDrawing;
+import org.insa.graph.Node;
+
+public class WeaklyConnectedComponentGraphicObserver extends WeaklyConnectedComponentObserver {
+	
+	private static final Color[] COLORS = {
+		Color.BLUE, Color.ORANGE, Color.GREEN, Color.YELLOW, Color.RED
+	};
+
+	// Drawing + Graph drawing
+	private Drawing drawing;
+	private GraphDrawing gdrawing;
+	
+	// Current index color
+	private int cindex = 0;
+	
+	public WeaklyConnectedComponentGraphicObserver(Drawing drawing) {
+		super(true);
+		this.drawing = drawing;
+		this.gdrawing = new GraphDrawing(drawing);
+		this.drawing.setAutoRepaint(true);
+	}
+
+	@Override
+	public void notifyStartComponent(Node curNode) {
+		this.drawing.setColor(COLORS[cindex]);
+		cindex = (cindex + 1) % COLORS.length;
+	}
+
+	@Override
+	public void notifyNewNodeInComponent(Node node) {
+		this.gdrawing.drawPoint(node.getPoint(), 5);
+		this.drawing.repaint();
+	}
+
+	@Override
+	public void notifyEndComponent(ArrayList<Node> nodes) {
+	}
+
+}