Added support for setting connection routers for graph connections

org.eclipse.zest.core/src/org/eclipse/zest/core/widgets/Graph.java

@@ -18,6 +18,7 @@
 
 import org.eclipse.draw2d.Animation;
 import org.eclipse.draw2d.ColorConstants;
+import org.eclipse.draw2d.ConnectionRouter;
 import org.eclipse.draw2d.CoordinateListener;
 import org.eclipse.draw2d.FigureCanvas;
 import org.eclipse.draw2d.FreeformLayer;
@@ -103,6 +104,8 @@ public class Graph extends FigureCanvas implements IContainer {
 	private ScalableFreeformLayeredPane rootlayer;
 	private ZestRootLayer zestRootLayer;
 
+	private ConnectionRouter defaultConnectionRouter;
+
 	/**
 	 * Constructor for a Graph. This widget represents the root of the graph,
 	 * and can contain graph items such as graph nodes and graph connections.
@@ -1255,4 +1258,55 @@ public DisplayIndependentRectangle getLayoutBounds() {
 		return new DisplayIndependentRectangle(0, 0, preferredSize.width,
 				preferredSize.height);
 	}
+
+	/**
+	 * Sets the default connection router for the graph view, but does not apply
+	 * it retroactively.
+	 * 
+	 * @param defaultConnectionRouter
+	 * @since 2.0
+	 */
+	public void setDefaultConnectionRouter(
+			ConnectionRouter defaultConnectionRouter) {
+		this.defaultConnectionRouter = defaultConnectionRouter;
+	}
+
+	/**
+	 * Returns the default connection router for the graph view.
+	 * 
+	 * @return the default connection router; may be null.
+	 * @since 2.0
+	 */
+	public ConnectionRouter getDefaultConnectionRouter() {
+		return defaultConnectionRouter;
+	}
+
+	/**
+	 * Sets the default connection router for all connections that have no
+	 * connection routers attached to them.
+	 * 
+	 * @since 2.0
+	 */
+	public void applyConnectionRouter() {
+		// for (GraphConnection conn : getConnections()){
+		Iterator iterator = getConnections().iterator();
+		while (iterator.hasNext()) {
+			GraphConnection conn = (GraphConnection) iterator.next();
+			conn.getConnectionFigure().setConnectionRouter(
+					defaultConnectionRouter);
+		}
+		this.getRootLayer().getUpdateManager().performUpdate();
+	}
+
+	/**
+	 * Updates the deafult connection router and applies to to all existing
+	 * connections that have no connection routers set to them.
+	 * 
+	 * @param defaultConnectionRouter
+	 * @since 2.0
+	 */
+	public void applyConnectionRouter(ConnectionRouter defaultConnectionRouter) {
+		setDefaultConnectionRouter(defaultConnectionRouter);
+		applyConnectionRouter();
+	}
 }

org.eclipse.zest.core/src/org/eclipse/zest/core/widgets/GraphConnection.java

@@ -13,6 +13,7 @@
 import org.eclipse.draw2d.ChopboxAnchor;
 import org.eclipse.draw2d.ColorConstants;
 import org.eclipse.draw2d.Connection;
+import org.eclipse.draw2d.ConnectionRouter;
 import org.eclipse.draw2d.Graphics;
 import org.eclipse.draw2d.IFigure;
 import org.eclipse.draw2d.Label;
@@ -73,6 +74,8 @@ public class GraphConnection extends GraphItem {
 	private boolean highlighted;
 	private boolean hasCustomTooltip;
 
+	private ConnectionRouter router = null;
+
 	public GraphConnection(Graph graphModel, int style, GraphNode source,
 			GraphNode destination) {
 		super(graphModel, style);
@@ -614,6 +617,9 @@ private void doUpdateFigure(Connection connection) {
 			PolylineArcConnection arcConnection = (PolylineArcConnection) connection;
 			arcConnection.setDepth(curveDepth);
 		}
+		if (connectionFigure != null) {
+			applyConnectionRouter(connectionFigure);
+		}
 		if ((connectionStyle & ZestStyles.CONNECTIONS_DIRECTED) > 0) {
 			PolygonDecoration decoration = new PolygonDecoration();
 			if (getLineWidth() < 3) {
@@ -667,6 +673,7 @@ protected Point getReferencePoint() {
 			} else {
 				connectionFigure = new PolylineConnection();
 			}
+			applyConnectionRouter(connectionFigure);
 			sourceAnchor = new RoundedChopboxAnchor(
 					getSource().getNodeFigure(), 8);
 			targetAnchor = new RoundedChopboxAnchor(getDestination()
@@ -736,4 +743,17 @@ void applyLayoutChanges() {
 			layout.applyLayout();
 		}
 	}
+
+	/**
+	 * Sets the connection router
+	 * 
+	 * @param conn
+	 */
+	void applyConnectionRouter(Connection conn) {
+		if (router != null) {
+			conn.setConnectionRouter(router);
+		} else if (graph.getDefaultConnectionRouter() != null) {
+			conn.setConnectionRouter(graph.getDefaultConnectionRouter());
+		}
+	}
 }