Example for JFace connection router usage

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diff --git a/org.eclipse.zest.examples/src/org/eclipse/zest/examples/jface/ManhattanLayoutJFaceSnippet.java b/org.eclipse.zest.examples/src/org/eclipse/zest/examples/jface/ManhattanLayoutJFaceSnippet.java
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+++ b/org.eclipse.zest.examples/src/org/eclipse/zest/examples/jface/ManhattanLayoutJFaceSnippet.java
@@ -0,0 +1,159 @@
+/*******************************************************************************
+ * Copyright 2005-2007, CHISEL Group, University of Victoria, Victoria, BC, Canada.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     The Chisel Group, University of Victoria
+ *******************************************************************************/
+package org.eclipse.zest.examples.jface;
+
+import java.util.Iterator;
+
+import org.eclipse.draw2d.ConnectionRouter;
+import org.eclipse.draw2d.ManhattanConnectionRouter;
+import org.eclipse.jface.viewers.ISelectionChangedListener;
+import org.eclipse.jface.viewers.LabelProvider;
+import org.eclipse.jface.viewers.SelectionChangedEvent;
+import org.eclipse.jface.viewers.StructuredSelection;
+import org.eclipse.jface.viewers.Viewer;
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.graphics.Image;
+import org.eclipse.swt.layout.FillLayout;
+import org.eclipse.swt.widgets.Display;
+import org.eclipse.swt.widgets.Shell;
+import org.eclipse.zest.core.viewers.GraphViewer;
+import org.eclipse.zest.core.viewers.IConnectionRouterStyleProvider;
+import org.eclipse.zest.core.viewers.IGraphContentProvider;
+import org.eclipse.zest.layouts.algorithms.SpringLayoutAlgorithm;
+
+/**
+ * This snippet shows how to use the {@link IConnectionRouterStyleProvider}
+ * interface to set the connection router for some references.
+ * 
+ * Based on {@link GraphJFaceSnippet4}.
+ * 
+ * @author Zoltan Ujhelyi - update for connectionprovider
+ * @author Ian Bull - original implementation
+ * 
+ */
+public class ManhattanLayoutJFaceSnippet {
+
+	static class MyContentProvider implements IGraphContentProvider {
+
+		public Object getDestination(Object rel) {
+			if ("Rock2Paper".equals(rel)) {
+				return "Rock";
+			} else if ("Paper2Scissors".equals(rel)) {
+				return "Paper";
+			} else if ("Scissors2Rock".equals(rel)) {
+				return "Scissors";
+			}
+			return null;
+		}
+
+		public Object[] getElements(Object input) {
+			return new Object[] { "Rock2Paper", "Paper2Scissors",
+					"Scissors2Rock" };
+		}
+
+		public Object getSource(Object rel) {
+			if ("Rock2Paper".equals(rel)) {
+				return "Paper";
+			} else if ("Paper2Scissors".equals(rel)) {
+				return "Scissors";
+			} else if ("Scissors2Rock".equals(rel)) {
+				return "Rock";
+			}
+			return null;
+		}
+
+		public double getWeight(Object connection) {
+			return 0;
+		}
+
+		public void dispose() {
+		}
+
+		public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
+		}
+
+	}
+
+	static class MyLabelProvider extends LabelProvider implements
+			IConnectionRouterStyleProvider {
+		final Image image = Display.getDefault().getSystemImage(
+				SWT.ICON_WARNING);
+
+		public Image getImage(Object element) {
+			if (element.equals("Rock") || element.equals("Paper")
+					|| element.equals("Scissors")) {
+				return image;
+			}
+			return null;
+		}
+
+		public String getText(Object element) {
+			return element.toString();
+		}
+
+		public ConnectionRouter getConnectionRouter(Object rel) {
+			if (!rel.equals("Scissors2Rock"))
+				return new ManhattanConnectionRouter();
+			else
+				return null;
+		}
+
+	}
+
+	static GraphViewer viewer = null;
+
+	/**
+	 * @param args
+	 */
+	public static void main(String[] args) {
+		Display d = new Display();
+		Shell shell = new Shell(d);
+		shell.setText("GraphJFaceSnippet2");
+		shell.setLayout(new FillLayout(SWT.VERTICAL));
+		shell.setSize(400, 400);
+		viewer = new GraphViewer(shell, SWT.NONE);
+		viewer.setContentProvider(new MyContentProvider());
+		viewer.setLabelProvider(new MyLabelProvider());
+		viewer.setLayoutAlgorithm(new SpringLayoutAlgorithm());
+		viewer.setInput(new Object());
+		viewer.addSelectionChangedListener(new ISelectionChangedListener() {
+
+			public void selectionChanged(SelectionChangedEvent event) {
+				System.out.println("Selection Changed: "
+						+ selectionToString((StructuredSelection) event
+								.getSelection()));
+			}
+
+			private String selectionToString(StructuredSelection selection) {
+				StringBuffer stringBuffer = new StringBuffer();
+				Iterator iterator = selection.iterator();
+				boolean first = true;
+				while (iterator.hasNext()) {
+					if (first) {
+						first = false;
+					} else {
+						stringBuffer.append(" : ");
+					}
+					stringBuffer.append(iterator.next());
+				}
+				return stringBuffer.toString();
+			}
+
+		});
+		shell.open();
+		while (!shell.isDisposed()) {
+			while (!d.readAndDispatch()) {
+				d.sleep();
+			}
+		}
+
+	}
+}