1 files changed, 31 insertions, 0 deletions
diff --git a/watchmaker/examples/src/java/main/org/uncommons/watchmaker/examples/travellingsalesman/ProgressListener.java b/watchmaker/examples/src/java/main/org/uncommons/watchmaker/examples/travellingsalesman/ProgressListener.java
new file mode 100644
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--- /dev/null
+++ b/watchmaker/examples/src/java/main/org/uncommons/watchmaker/examples/travellingsalesman/ProgressListener.java
@@ -0,0 +1,31 @@
+//=============================================================================
+// Copyright 2006-2010 Daniel W. Dyer
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//=============================================================================
+package org.uncommons.watchmaker.examples.travellingsalesman;
+
+/**
+ * Call-back interface for keeping track of the progress of a
+ * {@link TravellingSalesmanStrategy} implementation.
+ * @author Daniel Dyer
+ */
+public interface ProgressListener
+{
+    /**
+     * Call-back method that informs the implementing object
+     * of the current completion percentage.
+     * @param percentComplete A percentage between 0 and 100.
+     */
+    void updateProgress(double percentComplete);
+}