/* * Copyright (c) 1999, 2006, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code 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 General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */package javax.swing; /** * A <code>ComponentInputMap</code> is an <code>InputMap</code> * associated with a particular <code>JComponent</code>. * The component is automatically notified whenever * the <code>ComponentInputMap</code> changes. * <code>ComponentInputMap</code>s are used for * <code>WHEN_IN_FOCUSED_WINDOW</code> bindings. * * @author Scott Violet * @since 1.3 */public class ComponentInputMap extends InputMap {    /** Component binding is created for. */    private JComponent          component;     /**     * Creates a <code>ComponentInputMap</code> associated with the     * specified component.     *     * @param component  a non-null <code>JComponent</code>     * @throws IllegalArgumentException  if <code>component</code> is null     */    public ComponentInputMap(JComponent component) {        this.component = component;        if (component == null) {            throw new IllegalArgumentException("ComponentInputMaps must be associated with a non-null JComponent");        }    }     /**     * Sets the parent, which must be a <code>ComponentInputMap</code>     * associated with the same component as this     * <code>ComponentInputMap</code>.     *     * @param map  a <code>ComponentInputMap</code>     *     * @throws IllegalArgumentException  if <code>map</code>     *         is not a <code>ComponentInputMap</code>     *         or is not associated with the same component     */    public void setParent(InputMap map) {        if (getParent() == map) {            return;        }        if (map != null && (!(map instanceof ComponentInputMap) ||                 ((ComponentInputMap)map).getComponent() != getComponent())) {            throw new IllegalArgumentException("ComponentInputMaps must have a parent ComponentInputMap associated with the same component");        }        super.setParent(map);        getComponent().componentInputMapChanged(this);    }     /**     * Returns the component the <code>InputMap</code> was created for.     */    public JComponent getComponent() {        return component;    }     /**     * Adds a binding for <code>keyStroke</code> to <code>actionMapKey</code>.     * If <code>actionMapKey</code> is null, this removes the current binding     * for <code>keyStroke</code>.     */    public void put(KeyStroke keyStroke, Object actionMapKey) {        super.put(keyStroke, actionMapKey);        if (getComponent() != null) {            getComponent().componentInputMapChanged(this);        }    }     /**     * Removes the binding for <code>key</code> from this object.     */    public void remove(KeyStroke key) {        super.remove(key);        if (getComponent() != null) {            getComponent().componentInputMapChanged(this);        }    }     /**     * Removes all the mappings from this object.     */    public void clear() {        int oldSize = size();        super.clear();        if (oldSize > 0 && getComponent() != null) {            getComponent().componentInputMapChanged(this);        }    }}