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diff --git a/src/guichan/keylistener.hpp b/src/guichan/keylistener.hpp
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+/*      _______   __   __   __   ______   __   __   _______   __   __
+ *     / _____/\ / /\ / /\ / /\ / ____/\ / /\ / /\ / ___  /\ /  |\/ /\
+ *    / /\____\// / // / // / // /\___\// /_// / // /\_/ / // , |/ / /
+ *   / / /__   / / // / // / // / /    / ___  / // ___  / // /| ' / /
+ *  / /_// /\ / /_// / // / // /_/_   / / // / // /\_/ / // / |  / /
+ * /______/ //______/ //_/ //_____/\ /_/ //_/ //_/ //_/ //_/ /|_/ /
+ * \______\/ \______\/ \_\/ \_____\/ \_\/ \_\/ \_\/ \_\/ \_\/ \_\/
+ *
+ * Copyright (c) 2004 - 2008 Olof Naessén and Per Larsson
+ *
+ *
+ * Per Larsson a.k.a finalman
+ * Olof Naessén a.k.a jansem/yakslem
+ *
+ * Visit: http://guichan.sourceforge.net
+ *
+ * License: (BSD)
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name of Guichan nor the names of its contributors may
+ *    be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef GCN_KEYLISTENER_HPP
+#define GCN_KEYLISTENER_HPP
+
+#include "guichan/keyevent.hpp"
+#include "guichan/platform.hpp"
+
+namespace gcn
+{
+    class Key;
+
+    /**
+     * Interface for listening for key events from widgets.
+     *
+     * @see Widget::addKeyListener, Widget::removeKeyListener
+     */
+    class GCN_CORE_DECLSPEC KeyListener
+    {
+    public:
+
+        /**
+         * Destructor.
+         */
+        virtual ~KeyListener() { }
+
+        /**
+         * Called if a key is pressed when the widget has keyboard focus.
+         * If a key is held down the widget will generate multiple key
+         * presses.
+         *
+         * @param keyEvent Discribes the event.
+         */
+        virtual void keyPressed(KeyEvent& keyEvent) { }
+
+        /**
+         * Called if a key is released when the widget has keyboard focus.
+         *
+         * @param keyEvent Discribes the event.
+         */
+        virtual void keyReleased(KeyEvent& keyEvent) { }
+
+    protected:
+        /**
+         * Constructor.
+         *
+         * You should not be able to make an instance of KeyListener,
+         * therefore its constructor is protected.
+         */
+        KeyListener() { }
+    };
+}
+
+#endif // end GCN_KEYLISTENER_HPP