--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwtx/draw2d/ConnectionRouter.d	Sun Aug 03 00:52:14 2008 +0200
@@ -0,0 +1,99 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2005 IBM Corporation and others.
+ * 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:
+ *     IBM Corporation - initial API and implementation
+ * Port to the D programming language:
+ *     Frank Benoit <benoit@tionex.de>
+ *******************************************************************************/
+module dwtx.draw2d.ConnectionRouter;
+
+import dwt.dwthelper.utils;
+
+import dwtx.draw2d.geometry.Point;
+import dwtx.draw2d.geometry.PointList;
+import dwtx.draw2d.AnchorListener;
+import dwtx.draw2d.AbstractRouter;
+import dwtx.draw2d.Connection;
+
+/**
+ * Routes a {@link Connection}, possibly using a constraint.
+ */
+public interface ConnectionRouter {
+
+/**
+ * Returns the constraint for the Connection.
+ * @param connection The connection
+ * @return The constraint
+ */
+Object getConstraint(Connection connection);
+
+/**
+ * Invalidates the given Connection.
+ * @param connection The connection to be invalidated
+ */
+void invalidate(Connection connection);
+
+/**
+ * Routes the Connection.
+ * @param connection The Connection to route
+ */
+void route(Connection connection);
+
+/**
+ * Removes the Connection from this router.
+ * @param connection The Connection to remove
+ */
+void remove(Connection connection);
+
+/**
+ * Maps the given constraint to the given Connection.
+ * @param connection The Connection
+ * @param constraint The constraint
+ */
+void setConstraint(Connection connection, Object constraint);
+
+
+}
+/**
+ * Routes Connections directly from the source anchor to the target anchor with no
+ * bendpoints in between.
+ */
+class NullConnectionRouter
+    : AbstractRouter
+{
+
+    /**
+     * Constructs a new NullConnectionRouter.
+     */
+    this() { }
+
+    /**
+     * Routes the given Connection directly between the source and target anchors.
+     * @param conn the connection to be routed
+     */
+    public void route(Connection conn) {
+        PointList points = conn.getPoints();
+        points.removeAllPoints();
+        Point p;
+        conn.translateToRelative(p = getStartPoint(conn));
+        points.addPoint(p);
+        conn.translateToRelative(p = getEndPoint(conn));
+        points.addPoint(p);
+        conn.setPoints(points);
+    }
+}
+
+/**
+ * The default router for Connections.
+ */
+public static const ConnectionRouter ConnectionRouter_NULL;
+
+static this(){
+    ConnectionRouter_NULL = new NullConnectionRouter();
+}
+