--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwtx/draw2d/FanRouter.d	Sun Aug 03 00:52:14 2008 +0200
@@ -0,0 +1,95 @@
+/*******************************************************************************
+ * 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.FanRouter;
+
+import dwt.dwthelper.utils;
+
+import dwtx.draw2d.geometry.Point;
+import dwtx.draw2d.geometry.PointList;
+import dwtx.draw2d.geometry.Ray;
+import dwtx.draw2d.AutomaticRouter;
+import dwtx.draw2d.PositionConstants;
+
+/**
+ * Automatic router that spreads its {@link Connection Connections} in a fan-like fashion
+ * upon collision.
+ */
+public class FanRouter
+    : AutomaticRouter
+{
+
+private int separation = 10;
+
+/**
+ * Returns the separation in pixels between fanned connections.
+ *
+ * @return the separation
+ * @since 2.0
+ */
+public int getSeparation() {
+    return separation;
+}
+
+/**
+ * Modifies a given PointList that collides with some other PointList.  The given
+ * <i>index</i> indicates that this it the i<sup>th</sup> PointList in a group of
+ * colliding points.
+ *
+ * @param points the colliding points
+ * @param index the index
+ */
+protected void handleCollision(PointList points, int index) {
+    Point start = points.getFirstPoint();
+    Point end = points.getLastPoint();
+
+    if (start.opEquals(end))
+        return;
+
+    Point midPoint = new Point((end.x + start.x) / 2, (end.y + start.y) / 2);
+    int position = end.getPosition(start);
+    Ray ray;
+    if (position is PositionConstants.SOUTH || position is PositionConstants.EAST)
+        ray = new Ray(start, end);
+    else
+        ray = new Ray(end, start);
+    double length = ray.length();
+
+    double xSeparation = separation * ray.x / length;
+    double ySeparation = separation * ray.y / length;
+
+    Point bendPoint;
+
+    if (index % 2 is 0) {
+        bendPoint = new Point(
+            midPoint.x + (index / 2) * (-1 * ySeparation),
+            midPoint.y + (index / 2) * xSeparation);
+    } else {
+        bendPoint = new Point(
+            midPoint.x + (index / 2) * ySeparation,
+            midPoint.y + (index / 2) * (-1 * xSeparation));
+    }
+    if (!bendPoint.opEquals(midPoint))
+        points.insertPoint(bendPoint, 1);
+}
+
+/**
+ * Sets the colliding {@link Connection Connection's} separation in pixels.
+ *
+ * @param value the separation
+ * @since 2.0
+ */
+public void setSeparation(int value) {
+    separation = value;
+}
+
+}