/*
 * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
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 */
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
 */
@SuppressWarnings("serial")
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);
 }
 }
}