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+/* BasicMenuBarUI.java --
+ Copyright (C) 2002, 2004, 2005 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath 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 for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING. If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library. Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module. An independent module is a module which is not derived from
+or based on this library. If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so. If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package javax.swing.plaf.basic;
+
+import java.awt.Dimension;
+import java.awt.event.ActionEvent;
+import java.awt.event.ContainerEvent;
+import java.awt.event.ContainerListener;
+import java.awt.event.MouseEvent;
+import java.beans.PropertyChangeEvent;
+import java.beans.PropertyChangeListener;
+
+import javax.swing.AbstractAction;
+import javax.swing.Action;
+import javax.swing.ActionMap;
+import javax.swing.BoxLayout;
+import javax.swing.InputMap;
+import javax.swing.JComponent;
+import javax.swing.JMenu;
+import javax.swing.JMenuBar;
+import javax.swing.LookAndFeel;
+import javax.swing.MenuElement;
+import javax.swing.MenuSelectionManager;
+import javax.swing.SwingUtilities;
+import javax.swing.UIManager;
+import javax.swing.event.ChangeEvent;
+import javax.swing.event.ChangeListener;
+import javax.swing.event.MouseInputListener;
+import javax.swing.plaf.ActionMapUIResource;
+import javax.swing.plaf.ComponentUI;
+import javax.swing.plaf.MenuBarUI;
+
+/**
+ * UI Delegate for JMenuBar.
+ */
+public class BasicMenuBarUI extends MenuBarUI
+{
+
+ /**
+ * This action is performed for the action command 'takeFocus'.
+ */
+ private static class FocusAction
+ extends AbstractAction
+ {
+
+ /**
+ * Creates a new FocusAction.
+ */
+ FocusAction()
+ {
+ super("takeFocus");
+ }
+
+ /**
+ * Performs the action.
+ */
+ public void actionPerformed(ActionEvent event)
+ {
+ // In the JDK this action seems to pop up the first menu of the
+ // menu bar.
+ JMenuBar menuBar = (JMenuBar) event.getSource();
+ MenuSelectionManager defaultManager =
+ MenuSelectionManager.defaultManager();
+ MenuElement me[];
+ MenuElement subElements[];
+ JMenu menu = menuBar.getMenu(0);
+ if (menu != null)
+ {
+ me = new MenuElement[3];
+ me[0] = (MenuElement) menuBar;
+ me[1] = (MenuElement) menu;
+ me[2] = (MenuElement) menu.getPopupMenu();
+ defaultManager.setSelectedPath(me);
+ }
+ }
+
+ }
+
+ protected ChangeListener changeListener;
+
+ /*ContainerListener that listens to the ContainerEvents fired from menu bar*/
+ protected ContainerListener containerListener;
+
+ /*Property change listeners that listener to PropertyChangeEvent from menu bar*/
+ private PropertyChangeListener propertyChangeListener;
+
+ /* menu bar for which this UI delegate is for*/
+ protected JMenuBar menuBar;
+
+ /* MouseListener that listens to the mouseEvents fired from menu bar*/
+ private MouseInputListener mouseListener;
+
+ /**
+ * Creates a new BasicMenuBarUI object.
+ */
+ public BasicMenuBarUI()
+ {
+ changeListener = createChangeListener();
+ containerListener = createContainerListener();
+ propertyChangeListener = new PropertyChangeHandler();
+ mouseListener = new MouseInputHandler();
+ }
+
+ /**
+ * Creates ChangeListener
+ *
+ * @return The ChangeListener
+ */
+ protected ChangeListener createChangeListener()
+ {
+ return new ChangeHandler();
+ }
+
+ /**
+ * Creates ContainerListener() to listen for ContainerEvents
+ * fired by JMenuBar.
+ *
+ * @return The ContainerListener
+ */
+ protected ContainerListener createContainerListener()
+ {
+ return new ContainerHandler();
+ }
+
+ /**
+ * Factory method to create a BasicMenuBarUI for the given {@link
+ * JComponent}, which should be a {@link JMenuBar}.
+ *
+ * @param x The {@link JComponent} a UI is being created for.
+ *
+ * @return A BasicMenuBarUI for the {@link JComponent}.
+ */
+ public static ComponentUI createUI(JComponent x)
+ {
+ return new BasicMenuBarUI();
+ }
+
+ /**
+ * Returns maximum size for the specified menu bar
+ *
+ * @param c component for which to get maximum size
+ *
+ * @return Maximum size for the specified menu bar
+ */
+ public Dimension getMaximumSize(JComponent c)
+ {
+ // let layout manager calculate its size
+ return null;
+ }
+
+ /**
+ * Returns maximum allowed size of JMenuBar.
+ *
+ * @param c menuBar for which to return maximum size
+ *
+ * @return Maximum size of the give menu bar.
+ */
+ public Dimension getMinimumSize(JComponent c)
+ {
+ // let layout manager calculate its size
+ return null;
+ }
+
+ /**
+ * Returns preferred size of JMenuBar.
+ *
+ * @param c menuBar for which to return preferred size
+ *
+ * @return Preferred size of the give menu bar.
+ */
+ public Dimension getPreferredSize(JComponent c)
+ {
+ // let layout manager calculate its size
+ return null;
+ }
+
+ /**
+ * Initializes any default properties that this UI has from the defaults for
+ * the Basic look and feel.
+ */
+ protected void installDefaults()
+ {
+ LookAndFeel.installBorder(menuBar, "MenuBar.border");
+ LookAndFeel.installColorsAndFont(menuBar, "MenuBar.background",
+ "MenuBar.foreground", "MenuBar.font");
+ menuBar.setOpaque(true);
+ }
+
+ /**
+ * This method installs the keyboard actions for the JMenuBar.
+ */
+ protected void installKeyboardActions()
+ {
+ // Install InputMap.
+ Object[] bindings =
+ (Object[]) SharedUIDefaults.get("MenuBar.windowBindings");
+ InputMap inputMap = LookAndFeel.makeComponentInputMap(menuBar, bindings);
+ SwingUtilities.replaceUIInputMap(menuBar,
+ JComponent.WHEN_IN_FOCUSED_WINDOW,
+ inputMap);
+
+ // Install ActionMap.
+ SwingUtilities.replaceUIActionMap(menuBar, getActionMap());
+ }
+
+ /**
+ * Creates and returns the shared action map for JTrees.
+ *
+ * @return the shared action map for JTrees
+ */
+ private ActionMap getActionMap()
+ {
+ ActionMap am = (ActionMap) UIManager.get("MenuBar.actionMap");
+ if (am == null)
+ {
+ am = createDefaultActions();
+ UIManager.getLookAndFeelDefaults().put("MenuBar.actionMap", am);
+ }
+ return am;
+ }
+
+ /**
+ * Creates the default actions when there are none specified by the L&F.
+ *
+ * @return the default actions
+ */
+ private ActionMap createDefaultActions()
+ {
+ ActionMapUIResource am = new ActionMapUIResource();
+ Action action = new FocusAction();
+ am.put(action.getValue(Action.NAME), action);
+ return am;
+ }
+
+ /**
+ * This method installs the listeners needed for this UI to function.
+ */
+ protected void installListeners()
+ {
+ menuBar.addContainerListener(containerListener);
+ menuBar.addPropertyChangeListener(propertyChangeListener);
+ menuBar.addMouseListener(mouseListener);
+ }
+
+ /**
+ * Installs and initializes all fields for this UI delegate. Any properties
+ * of the UI that need to be initialized and/or set to defaults will be
+ * done now. It will also install any listeners necessary.
+ *
+ * @param c The {@link JComponent} that is having this UI installed.
+ */
+ public void installUI(JComponent c)
+ {
+ super.installUI(c);
+ menuBar = (JMenuBar) c;
+ menuBar.setLayout(new BoxLayout(menuBar, BoxLayout.X_AXIS));
+ installDefaults();
+ installListeners();
+ installKeyboardActions();
+ }
+
+ /**
+ * This method uninstalls the defaults and nulls any objects created during
+ * install.
+ */
+ protected void uninstallDefaults()
+ {
+ menuBar.setBackground(null);
+ menuBar.setBorder(null);
+ menuBar.setFont(null);
+ menuBar.setForeground(null);
+ }
+
+ /**
+ * This method reverses the work done in installKeyboardActions.
+ */
+ protected void uninstallKeyboardActions()
+ {
+ SwingUtilities.replaceUIInputMap(menuBar,
+ JComponent.WHEN_IN_FOCUSED_WINDOW, null);
+ SwingUtilities.replaceUIActionMap(menuBar, null);
+ }
+
+ /**
+ * Unregisters all the listeners that this UI delegate was using.
+ */
+ protected void uninstallListeners()
+ {
+ menuBar.removeContainerListener(containerListener);
+ menuBar.removePropertyChangeListener(propertyChangeListener);
+ menuBar.removeMouseListener(mouseListener);
+ }
+
+ /**
+ * Performs the opposite of installUI. Any properties or resources that need
+ * to be cleaned up will be done now. It will also uninstall any listeners
+ * it has. In addition, any properties of this UI will be nulled.
+ *
+ * @param c The {@link JComponent} that is having this UI uninstalled.
+ */
+ public void uninstallUI(JComponent c)
+ {
+ uninstallDefaults();
+ uninstallListeners();
+ uninstallKeyboardActions();
+ menuBar = null;
+ }
+
+ private class ChangeHandler implements ChangeListener
+ {
+ public void stateChanged(ChangeEvent event)
+ {
+ // TODO: What should be done here, if anything?
+ }
+ }
+
+ /**
+ * This class handles ContainerEvents fired by JMenuBar. It revalidates
+ * and repaints menu bar whenever menu is added or removed from it.
+ */
+ private class ContainerHandler implements ContainerListener
+ {
+ /**
+ * This method is called whenever menu is added to the menu bar
+ *
+ * @param e The ContainerEvent.
+ */
+ public void componentAdded(ContainerEvent e)
+ {
+ menuBar.revalidate();
+ menuBar.repaint();
+ }
+
+ /**
+ * This method is called whenever menu is removed from the menu bar.
+ *
+ * @param e The ContainerEvent.
+ */
+ public void componentRemoved(ContainerEvent e)
+ {
+ menuBar.revalidate();
+ menuBar.repaint();
+ }
+ }
+
+ /**
+ * This class handles PropertyChangeEvents fired from the JMenuBar
+ */
+ private class PropertyChangeHandler implements PropertyChangeListener
+ {
+ /**
+ * This method is called whenever one of the properties of the MenuBar
+ * changes.
+ *
+ * @param e The PropertyChangeEvent.
+ */
+ public void propertyChange(PropertyChangeEvent e)
+ {
+ if (e.getPropertyName().equals("borderPainted"))
+ menuBar.repaint();
+ if (e.getPropertyName().equals("margin"))
+ menuBar.repaint();
+ }
+ }
+
+ private class MouseInputHandler implements MouseInputListener
+ {
+ /**
+ * Handles mouse clicked event
+ *
+ * @param e Mouse event
+ */
+ public void mouseClicked(MouseEvent e)
+ {
+ MenuElement[] me = menuBar.getSubElements();
+
+ for (int i = 0; i < me.length; i++)
+ {
+ JMenu menu = menuBar.getMenu(i);
+ if (menu != null)
+ menu.setSelected(false);
+ }
+ }
+
+ /**
+ * Handles mouse pressed event
+ *
+ * @param e Mouse event
+ */
+ public void mousePressed(MouseEvent e)
+ {
+ // TODO: What should be done here, if anything?
+ }
+
+ /**
+ * Handles mouse released event
+ *
+ * @param e Mouse event
+ */
+ public void mouseReleased(MouseEvent e)
+ {
+ // TODO: What should be done here, if anything?
+ }
+
+ /**
+ * Handles mouse exited event
+ *
+ * @param e Mouse event
+ */
+ public void mouseExited(MouseEvent e)
+ {
+ // TODO: What should be done here, if anything?
+ }
+
+ /**
+ * Handles mouse dragged event
+ *
+ * @param e Mouse event
+ */
+ public void mouseDragged(MouseEvent e)
+ {
+ // TODO: What should be done here, if anything?
+ }
+
+ /**
+ * Handles mouse moved event
+ *
+ * @param e Mouse event
+ */
+ public void mouseMoved(MouseEvent e)
+ {
+ // TODO: What should be done here, if anything?
+ }
+
+ /**
+ * Handles mouse entered event
+ *
+ * @param e Mouse event
+ */
+ public void mouseEntered(MouseEvent e)
+ {
+ // TODO: What should be done here, if anything?
+ }
+ }
+}