--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwtx/draw2d/graph/GraphVisitor.d	Sun Aug 03 00:52:14 2008 +0200
@@ -0,0 +1,38 @@
+/*******************************************************************************
+ * Copyright (c) 2003, 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.graph.GraphVisitor;
+
+import dwt.dwthelper.utils;
+import dwtx.draw2d.graph.DirectedGraph;
+
+/**
+ * Performs some action on a Graph.
+ * @author Randy Hudson
+ * @since 2.1.2
+ */
+abstract class GraphVisitor {
+
+/**
+ * Act on the given directed graph.
+ * @param g the graph
+ */
+void visit(DirectedGraph g) { }
+
+/**
+ * Called in reverse order of visit.
+ * @since 3.1
+ * @param g the graph to act upon
+ */
+void revisit(DirectedGraph g) { }
+
+}