Added an adapter for the PopupMenuListener interface.

git-svn-id: https://samskivert.googlecode.com/svn/trunk@878 6335cc39-0255-0410-8fd6-9bcaacd3b74c

projects/samskivert/src/java/com/samskivert/swing/event/PopupMenuAdapter.java

@@ -0,0 +1,54 @@
+//
+// $Id: PopupMenuAdapter.java,v 1.1 2002/10/27 08:31:29 shaper Exp $
+//
+// samskivert library - useful routines for java programs
+// Copyright (C) 2002 Walter Korman
+// 
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.samskivert.swing.event;
+
+import javax.swing.event.PopupMenuEvent;
+import javax.swing.event.PopupMenuListener;
+
+/**
+ * An abstract adapter class for receiving popup menu events. The methods
+ * in this class are empty. This class exists as a convenience for
+ * creating listener objects.
+ *
+ * <p> This class really ought to have been provided as a standard part of
+ * the <code>javax.swing.event</code> package, but somehow the developers
+ * missed it and so we've done their job for them.
+ */
+public abstract class PopupMenuAdapter implements PopupMenuListener
+{
+    // documentation inherited
+    public void popupMenuWillBecomeInvisible (PopupMenuEvent e)
+    {
+        // nothing to do here
+    }
+
+    // documentation inherited
+    public void popupMenuCanceled (PopupMenuEvent e)
+    {
+        // nothing to do here
+    }
+
+    // documentation inherited
+    public void popupMenuWillBecomeVisible (PopupMenuEvent e)
+    {
+        // nothing to do here
+    }
+}