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jeremybenn |
/* ComponentInputMap.java --
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Copyright (C) 2002, 2004 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package javax.swing;
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/**
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* An {@link InputMap} that is associated with a particular {@link JComponent}.
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* The component is notified when its <code>ComponentInputMap</code> changes.
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*
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* @author Andrew Selkirk
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* @author Michael Koch
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*/
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public class ComponentInputMap extends InputMap
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{
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/**
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* The component to notify.
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*/
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private JComponent component;
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/**
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* Creates <code>ComponentInputMap</code> object that notifies the given
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* component about changes to it.
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*
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* @param comp the component to notify
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*
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* @exception IllegalArgumentException if comp is null
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*/
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public ComponentInputMap(JComponent comp)
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{
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if (comp == null)
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throw new IllegalArgumentException();
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this.component = comp;
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}
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/**
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* Puts a new entry into the <code>InputMap</code>.
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* If actionMapKey is null an existing entry will be removed.
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*
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* @param keystroke the keystroke for the entry
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* @param value the action.
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*/
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public void put(KeyStroke keystroke, Object value)
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{
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super.put(keystroke, value);
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if (component != null)
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component.updateComponentInputMap(this);
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}
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/**
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* Clears the <code>InputMap</code>.
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*/
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public void clear()
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{
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super.clear();
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if (component != null)
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component.updateComponentInputMap(this);
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}
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/**
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* Remove an entry from the <code>InputMap</code>.
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*
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* @param keystroke the key of the entry to remove
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*/
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public void remove(KeyStroke keystroke)
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{
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super.remove(keystroke);
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if (component != null)
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component.updateComponentInputMap(this);
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}
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/**
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* Sets a parent for this <code>ComponentInputMap</code>.
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*
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* @param parentMap the new parent
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*
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* @exception IllegalArgumentException if parentMap is not a
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* <code>ComponentInputMap</code> or not associated with the same component
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*/
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public void setParent(InputMap parentMap)
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{
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if (parentMap != null && !(parentMap instanceof ComponentInputMap))
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throw new IllegalArgumentException("ComponentInputMaps can only have " +
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"ComponentInputMaps for parents");
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if (parentMap != null &&
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((ComponentInputMap) parentMap).getComponent() != component)
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throw new
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IllegalArgumentException("ComponentInputMaps' parents must " +
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"be associated with the same JComponents");
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super.setParent(parentMap);
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if (component != null)
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component.updateComponentInputMap(this);
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}
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/**
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* Returns the component to notify about changes.
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*
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* @return a <code>JComponent</code> object
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*/
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public JComponent getComponent()
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{
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return component;
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}
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}
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