/* * @(#)BasicMenuBarUI.java	1.80 03/12/19 * * Copyright 2004 Sun Microsystems, Inc. All rights reserved. * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. */package javax.swing.plaf.basic;import sun.swing.DefaultLookup;import sun.swing.UIAction;import javax.swing.*;import javax.swing.event.*;import java.awt.Color;import java.awt.Component;import java.awt.Container;import java.awt.Dimension;import java.awt.Graphics;import java.awt.Insets;import java.awt.Point;import java.awt.Rectangle;import java.awt.event.*;import java.beans.PropertyChangeEvent;import java.beans.PropertyChangeListener;import javax.swing.border.*;import javax.swing.plaf.*;/** * A default L&F implementation of MenuBarUI.  This implementation * is a "combined" view/controller. * * @version 1.80 12/19/03 * @author Georges Saab * @author David Karlton * @author Arnaud Weber */public class BasicMenuBarUI extends MenuBarUI  {    protected JMenuBar              menuBar = null;    protected ContainerListener     containerListener;    protected ChangeListener        changeListener;    private Handler handler;    public static ComponentUI createUI(JComponent x) {	return new BasicMenuBarUI();    }    static void loadActionMap(LazyActionMap map) {        map.put(new Actions(Actions.TAKE_FOCUS));    }    public void installUI(JComponent c) {	menuBar = (JMenuBar) c;	installDefaults();        installListeners();        installKeyboardActions();    }    protected void installDefaults() {	if (menuBar.getLayout() == null ||	    menuBar.getLayout() instanceof UIResource) {            menuBar.setLayout(new DefaultMenuLayout(menuBar,BoxLayout.LINE_AXIS));        }  	LookAndFeel.installProperty(menuBar, "opaque", Boolean.TRUE);	LookAndFeel.installBorder(menuBar,"MenuBar.border");	LookAndFeel.installColorsAndFont(menuBar,					      "MenuBar.background",					      "MenuBar.foreground",					      "MenuBar.font");    }    protected void installListeners() {        containerListener = createContainerListener();        changeListener = createChangeListener();	        for (int i = 0; i < menuBar.getMenuCount(); i++) {            JMenu menu = menuBar.getMenu(i);	    if (menu!=null)		menu.getModel().addChangeListener(changeListener);        	}	menuBar.addContainerListener(containerListener);    }    protected void installKeyboardActions() {	InputMap inputMap = getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);	SwingUtilities.replaceUIInputMap(menuBar,			   JComponent.WHEN_IN_FOCUSED_WINDOW, inputMap);        LazyActionMap.installLazyActionMap(menuBar, BasicMenuBarUI.class,                                           "MenuBar.actionMap");    }     InputMap getInputMap(int condition) {	if (condition == JComponent.WHEN_IN_FOCUSED_WINDOW) {	    Object[] bindings = (Object[])DefaultLookup.get		                (menuBar, this, "MenuBar.windowBindings");	    if (bindings != null) {		return LookAndFeel.makeComponentInputMap(menuBar, bindings);	    }	}	return null;    }    public void uninstallUI(JComponent c) {        uninstallDefaults();        uninstallListeners();        uninstallKeyboardActions();	menuBar = null;    }    protected void uninstallDefaults() {	if (menuBar!=null) {	    LookAndFeel.uninstallBorder(menuBar);	}    }    protected void uninstallListeners() {	menuBar.removeContainerListener(containerListener);        for (int i = 0; i < menuBar.getMenuCount(); i++) {	    JMenu menu = menuBar.getMenu(i);	    if (menu !=null)		menu.getModel().removeChangeListener(changeListener);        }	containerListener = null;	changeListener = null;        handler = null;    }    protected void uninstallKeyboardActions() {	SwingUtilities.replaceUIInputMap(menuBar, JComponent.				       WHEN_IN_FOCUSED_WINDOW, null);	SwingUtilities.replaceUIActionMap(menuBar, null);    }    protected ContainerListener createContainerListener() {	return getHandler();    }    protected ChangeListener createChangeListener() {        return getHandler();    }    private Handler getHandler() {        if (handler == null) {            handler = new Handler();        }        return handler;    }    public Dimension getMinimumSize(JComponent c) {        return null;    }    public Dimension getMaximumSize(JComponent c) {        return null;    }    private class Handler implements ChangeListener, ContainerListener {        //        // ChangeListener        //	public void stateChanged(ChangeEvent e) {	    int i,c;	    for(i=0,c = menuBar.getMenuCount() ; i < c ; i++) {		JMenu menu = menuBar.getMenu(i);		if(menu !=null && menu.isSelected()) {		    menuBar.getSelectionModel().setSelectedIndex(i);		    break;		}	    }	}        //        // ContainerListener        //	public void componentAdded(ContainerEvent e) {	    Component c = e.getChild();	    if (c instanceof JMenu)		((JMenu)c).getModel().addChangeListener(changeListener);	}	public void componentRemoved(ContainerEvent e) {	    Component c = e.getChild();	    if (c instanceof JMenu)		((JMenu)c).getModel().removeChangeListener(changeListener);	}    }    private static class Actions extends UIAction {        private static final String TAKE_FOCUS = "takeFocus";        Actions(String key) {            super(key);	}	public void actionPerformed(ActionEvent e) {            // TAKE_FOCUS	    JMenuBar menuBar = (JMenuBar)e.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);	    }	}    }}