--- /dev/null
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ * VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+/*\r
+ *\r
+ * @author Toni Kalajainen\r
+ */\r
+package org.simantics.utils.datastructures.prioritystack;\r
+\r
+public interface IPriorityStackListener<E> {\r
+\r
+ /**\r
+ * T has been added to the context\r
+ * @param sender context\r
+ * @param item\r
+ */\r
+ void itemAdded(IPriorityStack<E> sender, E item);\r
+ \r
+ /**\r
+ * T has been removed from the stack\r
+ * @param sender context\r
+ * @param item\r
+ */\r
+ void itemRemoved(IPriorityStack<E> sender, E item);\r
+\r
+}\r