ContextMenuHandler.java
资源名称:swingx.zip [点击查看]
上传用户:zhengdagz
上传日期:2014-03-06
资源大小:1956k
文件大小:4k
源码类别:
xml/soap/webservice
开发平台:
Java
- /*
- * $Id: ContextMenuHandler.java,v 1.4 2005/10/10 18:02:17 rbair Exp $
- *
- * Copyright 2004 Sun Microsystems, Inc., 4150 Network Circle,
- * Santa Clara, California 95054, U.S.A. All rights reserved.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
- package org.jdesktop.swingx.plaf;
- import java.awt.event.ActionEvent;
- import java.awt.event.MouseAdapter;
- import java.awt.event.MouseEvent;
- import javax.swing.AbstractAction;
- import javax.swing.Action;
- import javax.swing.ActionMap;
- import javax.swing.JComponent;
- import javax.swing.JPopupMenu;
- import javax.swing.SwingUtilities;
- import javax.swing.text.JTextComponent;
- /**
- * Responsible for showing the default PopupMenu.
- *
- * @author Jeanette Winzenburg
- */
- public class ContextMenuHandler extends MouseAdapter {
- private ActionMap actionMap;
- private ContextMenuSource contextMenuSource;
- private JPopupMenu popup;
- /**
- * creates a context handler for TextContextMenuSource.
- *
- */
- public ContextMenuHandler() {
- this(null);
- }
- /**
- * creates a context handler for the given ContextMenuSource.
- * Defaults to TextContextMenuSource if source == null.
- *
- * @param source
- */
- public ContextMenuHandler(ContextMenuSource source) {
- contextMenuSource = source;
- }
- // --------------------- MouseListener
- public void mousePressed(MouseEvent e) {
- maybeShowContext(e);
- }
- public void mouseReleased(MouseEvent e) {
- maybeShowContext(e);
- }
- private void maybeShowContext(final MouseEvent e) {
- if (!e.isPopupTrigger() || !e.getComponent().isEnabled())
- return;
- if (e.getComponent().hasFocus()) {
- showContextPopup(e);
- } else {
- ((JComponent) e.getComponent()).grabFocus();
- SwingUtilities.invokeLater(new Runnable() {
- public void run() {
- showContextPopup(e);
- }
- });
- }
- }
- private void showContextPopup(MouseEvent e) {
- showContextPopup((JComponent) e.getComponent(), e.getX(), e
- .getY());
- }
- private void showContextPopup(JComponent component, int x, int y) {
- JPopupMenu popup = getPopupMenu(component, true);
- popup.show(component, x, y);
- }
- /**
- * @param component
- * @return
- */
- private JPopupMenu getPopupMenu(JComponent component, boolean synchEnabled) {
- if (popup == null) {
- popup = new JPopupMenu();
- ActionMap map = getActionMap(component);
- String[] keys = getContextMenuSource().getKeys();
- for (int i = 0; i < keys.length; i++) {
- if (keys[i] != null) {
- popup.add(map.get(keys[i]));
- } else {
- popup.addSeparator();
- }
- }
- }
- if (synchEnabled) {
- getContextMenuSource().updateActionEnabled(component, actionMap);
- }
- return popup;
- }
- private ActionMap getActionMap(JComponent component) {
- if (actionMap == null) {
- actionMap = getContextMenuSource().createActionMap(component);
- } else {
- // todo: replace actions with components?
- }
- return actionMap;
- }
- private ContextMenuSource getContextMenuSource() {
- if (contextMenuSource == null) {
- contextMenuSource = new TextContextMenuSource();
- }
- return contextMenuSource;
- }
- }