--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwtx/draw2d/MidpointLocator.d	Sun Aug 03 00:52:14 2008 +0200
@@ -0,0 +1,77 @@
+/*******************************************************************************
+ * 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.MidpointLocator;
+
+import dwt.dwthelper.utils;
+
+import dwtx.draw2d.geometry.Point;
+import dwtx.draw2d.ConnectionLocator;
+import dwtx.draw2d.Connection;
+
+/**
+ * A ConnectionLocator that is used to place figures at the midpoint between two points on
+ * a {@link dwtx.draw2d.Connection}.
+ */
+public class MidpointLocator
+    : ConnectionLocator
+{
+
+private int index;
+
+/**
+ * Constructs a MidpointLocator with associated Connection <i>c</i> and index <i>i</i>.
+ * The points at index i and i+1 on the connection are used to calculate the midpoint of
+ * the line segment.
+ *
+ * @param c the connection associated with the locator
+ * @param i the point from where the connection's midpoint will be calculated.
+ * @since 2.0
+ */
+public this(Connection c, int i) {
+    super(c);
+    index = i;
+}
+
+/**
+ * Returns this MidpointLocator's index. This integer represents the position of the start
+ * point in this MidpointLocator's associated {@link Connection} from where midpoint
+ * calculation will be made.
+ *
+ * @return the locator's index
+ * @since 2.0
+ */
+
+protected int getIndex() {
+    return index;
+}
+
+/**
+ * Returns the point of reference associated with this locator. This point will be midway
+ * between points at 'index' and 'index' + 1.
+ *
+ * @return the reference point
+ * @since 2.0
+ */
+protected Point getReferencePoint() {
+    Connection conn = getConnection();
+    Point p = Point.SINGLETON;
+    Point p1 = conn.getPoints().getPoint(getIndex());
+    Point p2 = conn.getPoints().getPoint(getIndex() + 1);
+    conn.translateToAbsolute(p1);
+    conn.translateToAbsolute(p2);
+    p.x = (p2.x - p1.x) / 2 + p1.x;
+    p.y = (p2.y - p1.y) / 2 + p1.y;
+    return p;
+}
+
+}