--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwtx/draw2d/ConnectionLayer.d	Sun Aug 03 00:52:14 2008 +0200
@@ -0,0 +1,117 @@
+/*******************************************************************************
+ * 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.ConnectionLayer;
+
+import dwt.dwthelper.utils;
+
+import dwt.DWT;
+import dwtx.draw2d.FreeformLayer;
+import dwtx.draw2d.IFigure;
+import dwtx.draw2d.Graphics;
+import dwtx.draw2d.ConnectionRouter;
+import dwtx.draw2d.Connection;
+
+/**
+ * Layer designed specifically to handle the presence of connections. This is done due to
+ * the necessity of having a router for the connections added.
+ */
+public class ConnectionLayer
+    : FreeformLayer
+{
+
+int antialias = DWT.DEFAULT;
+
+/**
+ * The ConnectionRouter used to route all connections on this layer.
+ */
+protected ConnectionRouter connectionRouter;
+
+/**
+ * Adds the given figure with the given contraint at the given index. If the figure is a
+ * {@link Connection}, its {@link ConnectionRouter} is set.
+ *
+ * @param figure  Figure being added
+ * @param constraint  Constraint of the figure being added
+ * @param index  Index where the figure is to be added
+ * @since 2.0
+ */
+public void add(IFigure figure, Object constraint, int index) {
+    super.add(figure, constraint, index);
+
+    // If the connection layout manager is set, then every
+    // figure added should use this layout manager.
+    if (null !is cast(Connection )figure && getConnectionRouter() !is null)
+        (cast(Connection)figure).setConnectionRouter(getConnectionRouter());
+}
+
+/**
+ * Returns the ConnectionRouter being used by this layer.
+ *
+ * @return  ConnectionRouter being used by this layer
+ * @since 2.0
+ */
+public ConnectionRouter getConnectionRouter() {
+    return connectionRouter;
+}
+
+/**
+ * @see IFigure#paint(Graphics)
+ */
+public void paint(Graphics graphics) {
+    if (antialias !is DWT.DEFAULT)
+        graphics.setAntialias(antialias);
+    super.paint(graphics);
+}
+
+/**
+ * Removes the figure from this Layer.  If the figure is a {@link Connection}, that
+ * Connection's {@link ConnectionRouter} is set to <code>null</code>.
+ *
+ * @param figure The figure to remove
+ */
+public void remove(IFigure figure) {
+    if ( auto f = cast(Connection)figure )
+        f.setConnectionRouter(null);
+    super.remove(figure);
+}
+
+/**
+ * Sets the ConnectionRouter for this layer. This router is set as the ConnectionRouter
+ * for all the child connections of this Layer.
+ *
+ * @param router  The ConnectionRouter to set for this Layer
+ * @since 2.0
+ */
+public void setConnectionRouter(ConnectionRouter router) {
+    connectionRouter = router;
+    FigureIterator iter = new FigureIterator(this);
+    IFigure figure;
+    while (iter.hasNext()) {
+        figure = iter.nextFigure();
+        if ( auto f = cast(Connection)figure )
+            f.setConnectionRouter(router);
+    }
+}
+
+/**
+ * Sets whether antialiasing should be enabled for the connection layer. If this value is
+ * set to something other than {@link DWT#DEFAULT}, {@link Graphics#setAntialias(int)}
+ * will be called with the given value when painting this layer.
+ * @param antialias the antialias setting
+ * @since 3.1
+ */
+public void setAntialias(int antialias) {
+    this.antialias = antialias;
+}
+
+}