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482 lines
13 KiB
Java
482 lines
13 KiB
Java
/* BasicMenuBarUI.java --
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Copyright (C) 2002, 2004, 2005 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.plaf.basic;
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import java.awt.Dimension;
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import java.awt.event.ActionEvent;
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import java.awt.event.ContainerEvent;
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import java.awt.event.ContainerListener;
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import java.awt.event.MouseEvent;
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import java.beans.PropertyChangeEvent;
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import java.beans.PropertyChangeListener;
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import javax.swing.AbstractAction;
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import javax.swing.Action;
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import javax.swing.ActionMap;
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import javax.swing.BoxLayout;
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import javax.swing.InputMap;
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import javax.swing.JComponent;
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import javax.swing.JMenu;
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import javax.swing.JMenuBar;
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import javax.swing.LookAndFeel;
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import javax.swing.MenuElement;
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import javax.swing.MenuSelectionManager;
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import javax.swing.SwingUtilities;
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import javax.swing.UIManager;
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import javax.swing.event.ChangeEvent;
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import javax.swing.event.ChangeListener;
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import javax.swing.event.MouseInputListener;
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import javax.swing.plaf.ActionMapUIResource;
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import javax.swing.plaf.ComponentUI;
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import javax.swing.plaf.MenuBarUI;
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/**
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* UI Delegate for JMenuBar.
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*/
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public class BasicMenuBarUI extends MenuBarUI
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{
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/**
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* This action is performed for the action command 'takeFocus'.
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*/
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private static class FocusAction
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extends AbstractAction
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{
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/**
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* Creates a new FocusAction.
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*/
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FocusAction()
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{
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super("takeFocus");
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}
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/**
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* Performs the action.
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*/
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public void actionPerformed(ActionEvent event)
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{
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// In the JDK this action seems to pop up the first menu of the
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// menu bar.
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JMenuBar menuBar = (JMenuBar) event.getSource();
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MenuSelectionManager defaultManager =
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MenuSelectionManager.defaultManager();
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MenuElement me[];
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MenuElement subElements[];
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JMenu menu = menuBar.getMenu(0);
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if (menu != null)
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{
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me = new MenuElement[3];
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me[0] = (MenuElement) menuBar;
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me[1] = (MenuElement) menu;
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me[2] = (MenuElement) menu.getPopupMenu();
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defaultManager.setSelectedPath(me);
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}
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}
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}
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protected ChangeListener changeListener;
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/*ContainerListener that listens to the ContainerEvents fired from menu bar*/
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protected ContainerListener containerListener;
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/*Property change listeners that listener to PropertyChangeEvent from menu bar*/
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private PropertyChangeListener propertyChangeListener;
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/* menu bar for which this UI delegate is for*/
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protected JMenuBar menuBar;
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/* MouseListener that listens to the mouseEvents fired from menu bar*/
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private MouseInputListener mouseListener;
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/**
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* Creates a new BasicMenuBarUI object.
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*/
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public BasicMenuBarUI()
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{
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changeListener = createChangeListener();
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containerListener = createContainerListener();
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propertyChangeListener = new PropertyChangeHandler();
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mouseListener = new MouseInputHandler();
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}
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/**
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* Creates ChangeListener
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*
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* @return The ChangeListener
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*/
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protected ChangeListener createChangeListener()
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{
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return new ChangeHandler();
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}
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/**
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* Creates ContainerListener() to listen for ContainerEvents
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* fired by JMenuBar.
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*
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* @return The ContainerListener
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*/
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protected ContainerListener createContainerListener()
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{
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return new ContainerHandler();
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}
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/**
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* Factory method to create a BasicMenuBarUI for the given {@link
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* JComponent}, which should be a {@link JMenuBar}.
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*
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* @param x The {@link JComponent} a UI is being created for.
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*
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* @return A BasicMenuBarUI for the {@link JComponent}.
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*/
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public static ComponentUI createUI(JComponent x)
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{
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return new BasicMenuBarUI();
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}
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/**
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* Returns maximum size for the specified menu bar
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*
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* @param c component for which to get maximum size
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*
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* @return Maximum size for the specified menu bar
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*/
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public Dimension getMaximumSize(JComponent c)
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{
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// let layout manager calculate its size
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return null;
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}
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/**
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* Returns maximum allowed size of JMenuBar.
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*
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* @param c menuBar for which to return maximum size
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*
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* @return Maximum size of the give menu bar.
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*/
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public Dimension getMinimumSize(JComponent c)
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{
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// let layout manager calculate its size
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return null;
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}
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/**
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* Returns preferred size of JMenuBar.
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*
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* @param c menuBar for which to return preferred size
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*
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* @return Preferred size of the give menu bar.
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*/
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public Dimension getPreferredSize(JComponent c)
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{
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// let layout manager calculate its size
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return null;
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}
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/**
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* Initializes any default properties that this UI has from the defaults for
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* the Basic look and feel.
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*/
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protected void installDefaults()
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{
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LookAndFeel.installBorder(menuBar, "MenuBar.border");
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LookAndFeel.installColorsAndFont(menuBar, "MenuBar.background",
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"MenuBar.foreground", "MenuBar.font");
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menuBar.setOpaque(true);
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}
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/**
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* This method installs the keyboard actions for the JMenuBar.
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*/
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protected void installKeyboardActions()
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{
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// Install InputMap.
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Object[] bindings =
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(Object[]) SharedUIDefaults.get("MenuBar.windowBindings");
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InputMap inputMap = LookAndFeel.makeComponentInputMap(menuBar, bindings);
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SwingUtilities.replaceUIInputMap(menuBar,
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JComponent.WHEN_IN_FOCUSED_WINDOW,
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inputMap);
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// Install ActionMap.
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SwingUtilities.replaceUIActionMap(menuBar, getActionMap());
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}
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/**
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* Creates and returns the shared action map for JTrees.
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*
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* @return the shared action map for JTrees
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*/
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private ActionMap getActionMap()
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{
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ActionMap am = (ActionMap) UIManager.get("MenuBar.actionMap");
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if (am == null)
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{
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am = createDefaultActions();
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UIManager.getLookAndFeelDefaults().put("MenuBar.actionMap", am);
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}
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return am;
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}
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/**
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* Creates the default actions when there are none specified by the L&F.
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*
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* @return the default actions
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*/
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private ActionMap createDefaultActions()
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{
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ActionMapUIResource am = new ActionMapUIResource();
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Action action = new FocusAction();
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am.put(action.getValue(Action.NAME), action);
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return am;
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}
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/**
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* This method installs the listeners needed for this UI to function.
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*/
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protected void installListeners()
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{
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menuBar.addContainerListener(containerListener);
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menuBar.addPropertyChangeListener(propertyChangeListener);
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menuBar.addMouseListener(mouseListener);
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}
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/**
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* Installs and initializes all fields for this UI delegate. Any properties
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* of the UI that need to be initialized and/or set to defaults will be
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* done now. It will also install any listeners necessary.
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*
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* @param c The {@link JComponent} that is having this UI installed.
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*/
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public void installUI(JComponent c)
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{
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super.installUI(c);
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menuBar = (JMenuBar) c;
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menuBar.setLayout(new BoxLayout(menuBar, BoxLayout.X_AXIS));
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installDefaults();
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installListeners();
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installKeyboardActions();
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}
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/**
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* This method uninstalls the defaults and nulls any objects created during
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* install.
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*/
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protected void uninstallDefaults()
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{
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menuBar.setBackground(null);
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menuBar.setBorder(null);
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menuBar.setFont(null);
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menuBar.setForeground(null);
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}
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/**
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* This method reverses the work done in installKeyboardActions.
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*/
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protected void uninstallKeyboardActions()
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{
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SwingUtilities.replaceUIInputMap(menuBar,
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JComponent.WHEN_IN_FOCUSED_WINDOW, null);
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SwingUtilities.replaceUIActionMap(menuBar, null);
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}
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/**
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* Unregisters all the listeners that this UI delegate was using.
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*/
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protected void uninstallListeners()
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{
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menuBar.removeContainerListener(containerListener);
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menuBar.removePropertyChangeListener(propertyChangeListener);
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menuBar.removeMouseListener(mouseListener);
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}
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/**
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* Performs the opposite of installUI. Any properties or resources that need
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* to be cleaned up will be done now. It will also uninstall any listeners
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* it has. In addition, any properties of this UI will be nulled.
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*
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* @param c The {@link JComponent} that is having this UI uninstalled.
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*/
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public void uninstallUI(JComponent c)
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{
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uninstallDefaults();
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uninstallListeners();
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uninstallKeyboardActions();
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menuBar = null;
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}
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private class ChangeHandler implements ChangeListener
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{
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public void stateChanged(ChangeEvent event)
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{
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// TODO: What should be done here, if anything?
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}
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}
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/**
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* This class handles ContainerEvents fired by JMenuBar. It revalidates
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* and repaints menu bar whenever menu is added or removed from it.
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*/
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private class ContainerHandler implements ContainerListener
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{
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/**
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* This method is called whenever menu is added to the menu bar
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*
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* @param e The ContainerEvent.
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*/
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public void componentAdded(ContainerEvent e)
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{
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menuBar.revalidate();
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menuBar.repaint();
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}
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/**
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* This method is called whenever menu is removed from the menu bar.
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*
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* @param e The ContainerEvent.
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*/
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public void componentRemoved(ContainerEvent e)
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{
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menuBar.revalidate();
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menuBar.repaint();
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}
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}
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/**
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* This class handles PropertyChangeEvents fired from the JMenuBar
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*/
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private class PropertyChangeHandler implements PropertyChangeListener
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{
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/**
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* This method is called whenever one of the properties of the MenuBar
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* changes.
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*
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* @param e The PropertyChangeEvent.
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*/
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public void propertyChange(PropertyChangeEvent e)
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{
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if (e.getPropertyName().equals("borderPainted"))
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menuBar.repaint();
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if (e.getPropertyName().equals("margin"))
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menuBar.repaint();
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}
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}
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private class MouseInputHandler implements MouseInputListener
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{
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/**
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* Handles mouse clicked event
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*
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* @param e Mouse event
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*/
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public void mouseClicked(MouseEvent e)
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{
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MenuElement[] me = menuBar.getSubElements();
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for (int i = 0; i < me.length; i++)
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{
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JMenu menu = menuBar.getMenu(i);
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if (menu != null)
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menu.setSelected(false);
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}
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}
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/**
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* Handles mouse pressed event
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*
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* @param e Mouse event
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*/
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public void mousePressed(MouseEvent e)
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{
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// TODO: What should be done here, if anything?
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}
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/**
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* Handles mouse released event
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*
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* @param e Mouse event
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*/
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public void mouseReleased(MouseEvent e)
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{
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// TODO: What should be done here, if anything?
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}
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/**
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* Handles mouse exited event
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*
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* @param e Mouse event
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*/
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public void mouseExited(MouseEvent e)
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{
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// TODO: What should be done here, if anything?
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}
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/**
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* Handles mouse dragged event
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*
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* @param e Mouse event
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*/
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public void mouseDragged(MouseEvent e)
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{
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// TODO: What should be done here, if anything?
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}
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/**
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* Handles mouse moved event
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*
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* @param e Mouse event
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*/
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public void mouseMoved(MouseEvent e)
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{
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// TODO: What should be done here, if anything?
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}
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/**
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* Handles mouse entered event
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*
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* @param e Mouse event
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*/
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public void mouseEntered(MouseEvent e)
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{
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// TODO: What should be done here, if anything?
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}
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}
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}
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