001 /*
002 * $Id: ContextMenuHandler.java,v 1.5 2005/10/24 13:20:46 kleopatra Exp $
003 *
004 * Copyright 2004 Sun Microsystems, Inc., 4150 Network Circle,
005 * Santa Clara, California 95054, U.S.A. All rights reserved.
006 *
007 * This library is free software; you can redistribute it and/or
008 * modify it under the terms of the GNU Lesser General Public
009 * License as published by the Free Software Foundation; either
010 * version 2.1 of the License, or (at your option) any later version.
011 *
012 * This library is distributed in the hope that it will be useful,
013 * but WITHOUT ANY WARRANTY; without even the implied warranty of
014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
015 * Lesser General Public License for more details.
016 *
017 * You should have received a copy of the GNU Lesser General Public
018 * License along with this library; if not, write to the Free Software
019 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
020 */
021 package org.jdesktop.swingx.plaf;
022
023 import java.awt.event.MouseAdapter;
024 import java.awt.event.MouseEvent;
025
026 import javax.swing.ActionMap;
027 import javax.swing.JComponent;
028 import javax.swing.JPopupMenu;
029 import javax.swing.SwingUtilities;
030
031
032 /**
033 * Responsible for showing the default PopupMenu.
034 *
035 * @author Jeanette Winzenburg
036 */
037 public class ContextMenuHandler extends MouseAdapter {
038
039 private ActionMap actionMap;
040
041 private ContextMenuSource contextMenuSource;
042
043 private JPopupMenu popup;
044
045 /**
046 * creates a context handler for TextContextMenuSource.
047 *
048 */
049 public ContextMenuHandler() {
050 this(null);
051 }
052
053 /**
054 * creates a context handler for the given ContextMenuSource.
055 * Defaults to TextContextMenuSource if source == null.
056 *
057 * @param source
058 */
059 public ContextMenuHandler(ContextMenuSource source) {
060 contextMenuSource = source;
061 }
062
063 // --------------------- MouseListener
064
065 public void mousePressed(MouseEvent e) {
066 maybeShowContext(e);
067 }
068
069 public void mouseReleased(MouseEvent e) {
070 maybeShowContext(e);
071 }
072
073 private void maybeShowContext(final MouseEvent e) {
074 if (!e.isPopupTrigger() || !e.getComponent().isEnabled())
075 return;
076 if (e.getComponent().hasFocus()) {
077 showContextPopup(e);
078 } else {
079 ((JComponent) e.getComponent()).grabFocus();
080 SwingUtilities.invokeLater(new Runnable() {
081 public void run() {
082 showContextPopup(e);
083 }
084 });
085 }
086
087 }
088
089 private void showContextPopup(MouseEvent e) {
090 showContextPopup((JComponent) e.getComponent(), e.getX(), e
091 .getY());
092
093 }
094
095 private void showContextPopup(JComponent component, int x, int y) {
096 JPopupMenu popup = getPopupMenu(component, true);
097 popup.show(component, x, y);
098 }
099
100 /**
101 * @param component
102 * @return
103 */
104 private JPopupMenu getPopupMenu(JComponent component, boolean synchEnabled) {
105 if (popup == null) {
106 popup = new JPopupMenu();
107 ActionMap map = getActionMap(component);
108 String[] keys = getContextMenuSource().getKeys();
109 for (int i = 0; i < keys.length; i++) {
110 if (keys[i] != null) {
111 popup.add(map.get(keys[i]));
112 } else {
113 popup.addSeparator();
114 }
115 }
116 }
117 if (synchEnabled) {
118 getContextMenuSource().updateActionEnabled(component, actionMap);
119 }
120
121 return popup;
122 }
123
124 private ActionMap getActionMap(JComponent component) {
125 if (actionMap == null) {
126 actionMap = getContextMenuSource().createActionMap(component);
127 } else {
128 // todo: replace actions with components?
129 }
130 return actionMap;
131 }
132
133 private ContextMenuSource getContextMenuSource() {
134 if (contextMenuSource == null) {
135 contextMenuSource = new TextContextMenuSource();
136 }
137 return contextMenuSource;
138 }
139
140
141
142 }