java/16 : java.desktop/javax/swing/plaf/basic/BasicInternalFrameTitlePane.java

BasicInternalFrameTitlePane
https://openjdk.java.net/
GPLv2 + Classpath Exception
/*
 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package javax.swing.plaf.basic;

import sun.swing.SwingUtilities2;
import java.awt.*;
import java.awt.event.*;
import javax.accessibility.AccessibleContext;
import javax.swing.*;
import javax.swing.plaf.*;
import javax.swing.event.InternalFrameEvent;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyVetoException;
import static java.awt.RenderingHints.KEY_TEXT_ANTIALIASING;
import static java.awt.RenderingHints.KEY_TEXT_LCD_CONTRAST;

import sun.swing.DefaultLookup;

The class that manages a basic title bar

Warning:
Serialized objects of this class will not be compatible with
future Swing releases. The current serialization support is
appropriate for short term storage or RMI between applications running
the same version of Swing.  As of 1.4, support for long term storage
of all JavaBeans
has been added to the java.beans package. Please see XMLEncoder. 
Author: David Kloba, Steve Wilson/**
 * The class that manages a basic title bar
 * <p>
 * <strong>Warning:</strong>
 * Serialized objects of this class will not be compatible with
 * future Swing releases. The current serialization support is
 * appropriate for short term storage or RMI between applications running
 * the same version of Swing.  As of 1.4, support for long term storage
 * of all JavaBeans
 * has been added to the <code>java.beans</code> package.
 * Please see {@link java.beans.XMLEncoder}.
 *
 * @author David Kloba
 * @author Steve Wilson
 */
@SuppressWarnings("serial") // Same-version serialization only
public class BasicInternalFrameTitlePane extends JComponent
{
    The instance of JMenuBar. /**
     * The instance of {@code JMenuBar}.
     */
    protected JMenuBar menuBar;
    The iconify button.
/**
     * The iconify button.
     */
    protected JButton iconButton;
    The maximize button.
/**
     * The maximize button.
     */
    protected JButton maxButton;
    The close button.
/**
     * The close button.
     */
    protected JButton closeButton;

    The instance of JMenu. /**
     * The instance of {@code JMenu}.
     */
    protected JMenu windowMenu;
    The instance of JInternalFrame. /**
     * The instance of {@code JInternalFrame}.
     */
    protected JInternalFrame frame;

    The color of a selected title.
/**
     * The color of a selected title.
     */
    protected Color selectedTitleColor;
    The color of a selected text.
/**
     * The color of a selected text.
     */
    protected Color selectedTextColor;
    The color of a not selected title.
/**
     * The color of a not selected title.
     */
    protected Color notSelectedTitleColor;
    The color of a not selected text.
/**
     * The color of a not selected text.
     */
    protected Color notSelectedTextColor;

    The maximize icon.
/**
     * The maximize icon.
     */
    protected Icon maxIcon;
    The minimize icon.
/**
     * The minimize icon.
     */
    protected Icon minIcon;
    The iconify icon.
/**
     * The iconify icon.
     */
    protected Icon iconIcon;
    The close icon.
/**
     * The close icon.
     */
    protected Icon closeIcon;

    The instance of a PropertyChangeListener. /**
     * The instance of a {@code PropertyChangeListener}.
     */
    protected PropertyChangeListener propertyChangeListener;

    The instance of a CloseAction. /**
     * The instance of a {@code CloseAction}.
     */
    protected Action closeAction;
    The instance of a MaximizeAction. /**
     * The instance of a {@code MaximizeAction}.
     */
    protected Action maximizeAction;
    The instance of an IconifyAction. /**
     * The instance of an {@code IconifyAction}.
     */
    protected Action iconifyAction;
    The instance of a RestoreAction. /**
     * The instance of a {@code RestoreAction}.
     */
    protected Action restoreAction;
    The instance of a MoveAction. /**
     * The instance of a {@code MoveAction}.
     */
    protected Action moveAction;
    The instance of a SizeAction. /**
     * The instance of a {@code SizeAction}.
     */
    protected Action sizeAction;

    // These constants are not used in JDK code
    The close button text property.
/**
     * The close button text property.
     */
    protected static final String CLOSE_CMD =
        UIManager.getString("InternalFrameTitlePane.closeButtonText");
    The minimize button text property.
/**
     * The minimize button text property.
     */
    protected static final String ICONIFY_CMD =
        UIManager.getString("InternalFrameTitlePane.minimizeButtonText");
    The restore button text property.
/**
     * The restore button text property.
     */
    protected static final String RESTORE_CMD =
        UIManager.getString("InternalFrameTitlePane.restoreButtonText");
    The maximize button text property.
/**
     * The maximize button text property.
     */
    protected static final String MAXIMIZE_CMD =
        UIManager.getString("InternalFrameTitlePane.maximizeButtonText");
    The move button text property.
/**
     * The move button text property.
     */
    protected static final String MOVE_CMD =
        UIManager.getString("InternalFrameTitlePane.moveButtonText");
    The size button text property.
/**
     * The size button text property.
     */
    protected static final String SIZE_CMD =
        UIManager.getString("InternalFrameTitlePane.sizeButtonText");

    private String closeButtonToolTip;
    private String iconButtonToolTip;
    private String restoreButtonToolTip;
    private String maxButtonToolTip;
    private Handler handler;

    Constructs a new instance of BasicInternalFrameTitlePane. 
Params: f – an instance of JInternalFrame/**
     * Constructs a new instance of {@code BasicInternalFrameTitlePane}.
     *
     * @param f an instance of {@code JInternalFrame}
     */
    public BasicInternalFrameTitlePane(JInternalFrame f) {
        frame = f;
        installTitlePane();
    }

    Installs the title pane.
/**
     * Installs the title pane.
     */
    protected void installTitlePane() {
        installDefaults();
        installListeners();

        createActions();
        enableActions();
        createActionMap();

        setLayout(createLayout());

        assembleSystemMenu();
        createButtons();
        addSubComponents();

        updateProperties();
    }

    private void updateProperties() {
        putClientProperty(KEY_TEXT_ANTIALIASING,
                frame.getClientProperty(KEY_TEXT_ANTIALIASING));
        putClientProperty(KEY_TEXT_LCD_CONTRAST,
                frame.getClientProperty(KEY_TEXT_LCD_CONTRAST));
    }

    Adds subcomponents.
/**
     * Adds subcomponents.
     */
    protected void addSubComponents() {
        add(menuBar);
        add(iconButton);
        add(maxButton);
        add(closeButton);
    }

    Creates actions.
/**
     * Creates actions.
     */
    protected void createActions() {
        maximizeAction = new MaximizeAction();
        iconifyAction = new IconifyAction();
        closeAction = new CloseAction();
        restoreAction = new RestoreAction();
        moveAction = new MoveAction();
        sizeAction = new SizeAction();
    }

    ActionMap createActionMap() {
        ActionMap map = new ActionMapUIResource();
        map.put("showSystemMenu", new ShowSystemMenuAction(true));
        map.put("hideSystemMenu", new ShowSystemMenuAction(false));
        return map;
    }

    Registers listeners.
/**
     * Registers listeners.
     */
    protected void installListeners() {
        if( propertyChangeListener == null ) {
            propertyChangeListener = createPropertyChangeListener();
        }
        frame.addPropertyChangeListener(propertyChangeListener);
    }

    Unregisters listeners.
/**
     * Unregisters listeners.
     */
    protected void uninstallListeners() {
        frame.removePropertyChangeListener(propertyChangeListener);
        handler = null;
    }

    Installs default properties.
/**
     * Installs default properties.
     */
    protected void installDefaults() {
        maxIcon = UIManager.getIcon("InternalFrame.maximizeIcon");
        minIcon = UIManager.getIcon("InternalFrame.minimizeIcon");
        iconIcon = UIManager.getIcon("InternalFrame.iconifyIcon");
        closeIcon = UIManager.getIcon("InternalFrame.closeIcon");

        selectedTitleColor = UIManager.getColor("InternalFrame.activeTitleBackground");
        selectedTextColor = UIManager.getColor("InternalFrame.activeTitleForeground");
        notSelectedTitleColor = UIManager.getColor("InternalFrame.inactiveTitleBackground");
        notSelectedTextColor = UIManager.getColor("InternalFrame.inactiveTitleForeground");
        setFont(UIManager.getFont("InternalFrame.titleFont"));
        closeButtonToolTip =
                UIManager.getString("InternalFrame.closeButtonToolTip");
        iconButtonToolTip =
                UIManager.getString("InternalFrame.iconButtonToolTip");
        restoreButtonToolTip =
                UIManager.getString("InternalFrame.restoreButtonToolTip");
        maxButtonToolTip =
                UIManager.getString("InternalFrame.maxButtonToolTip");
    }

    Uninstalls default properties.
/**
     * Uninstalls default properties.
     */
    protected void uninstallDefaults() {
    }

    Creates buttons.
/**
     * Creates buttons.
     */
    protected void createButtons() {
        iconButton = new NoFocusButton(
                     "InternalFrameTitlePane.iconifyButtonAccessibleName",
                     "InternalFrameTitlePane.iconifyButtonOpacity");
        iconButton.addActionListener(iconifyAction);
        if (iconButtonToolTip != null && iconButtonToolTip.length() != 0) {
            iconButton.setToolTipText(iconButtonToolTip);
        }

        maxButton = new NoFocusButton(
                        "InternalFrameTitlePane.maximizeButtonAccessibleName",
                        "InternalFrameTitlePane.maximizeButtonOpacity");
        maxButton.addActionListener(maximizeAction);

        closeButton = new NoFocusButton(
                      "InternalFrameTitlePane.closeButtonAccessibleName",
                      "InternalFrameTitlePane.closeButtonOpacity");
        closeButton.addActionListener(closeAction);
        if (closeButtonToolTip != null && closeButtonToolTip.length() != 0) {
            closeButton.setToolTipText(closeButtonToolTip);
        }

        setButtonIcons();
    }

    Sets the button icons.
/**
     * Sets the button icons.
     */
    protected void setButtonIcons() {
        if(frame.isIcon()) {
            if (minIcon != null) {
                iconButton.setIcon(minIcon);
            }
            if (restoreButtonToolTip != null &&
                    restoreButtonToolTip.length() != 0) {
                iconButton.setToolTipText(restoreButtonToolTip);
            }
            if (maxIcon != null) {
                maxButton.setIcon(maxIcon);
            }
            if (maxButtonToolTip != null && maxButtonToolTip.length() != 0) {
                maxButton.setToolTipText(maxButtonToolTip);
            }
        } else if (frame.isMaximum()) {
            if (iconIcon != null) {
                iconButton.setIcon(iconIcon);
            }
            if (iconButtonToolTip != null && iconButtonToolTip.length() != 0) {
                iconButton.setToolTipText(iconButtonToolTip);
            }
            if (minIcon != null) {
                maxButton.setIcon(minIcon);
            }
            if (restoreButtonToolTip != null &&
                    restoreButtonToolTip.length() != 0) {
                maxButton.setToolTipText(restoreButtonToolTip);
            }
        } else {
            if (iconIcon != null) {
                iconButton.setIcon(iconIcon);
            }
            if (iconButtonToolTip != null && iconButtonToolTip.length() != 0) {
                iconButton.setToolTipText(iconButtonToolTip);
            }
            if (maxIcon != null) {
                maxButton.setIcon(maxIcon);
            }
            if (maxButtonToolTip != null && maxButtonToolTip.length() != 0) {
                maxButton.setToolTipText(maxButtonToolTip);
            }
        }
        if (closeIcon != null) {
            closeButton.setIcon(closeIcon);
        }
    }

    Assembles system menu.
/**
     * Assembles system menu.
     */
    protected void assembleSystemMenu() {
        menuBar = createSystemMenuBar();
        windowMenu = createSystemMenu();
        menuBar.add(windowMenu);
        addSystemMenuItems(windowMenu);
        enableActions();
    }

    Adds system menu items to systemMenu. 
Params: systemMenu – an instance of JMenu/**
     * Adds system menu items to {@code systemMenu}.
     *
     * @param systemMenu an instance of {@code JMenu}
     */
    protected void addSystemMenuItems(JMenu systemMenu) {
        JMenuItem mi = systemMenu.add(restoreAction);
        mi.setMnemonic(getButtonMnemonic("restore"));
        mi = systemMenu.add(moveAction);
        mi.setMnemonic(getButtonMnemonic("move"));
        mi = systemMenu.add(sizeAction);
        mi.setMnemonic(getButtonMnemonic("size"));
        mi = systemMenu.add(iconifyAction);
        mi.setMnemonic(getButtonMnemonic("minimize"));
        mi = systemMenu.add(maximizeAction);
        mi.setMnemonic(getButtonMnemonic("maximize"));
        systemMenu.add(new JSeparator());
        mi = systemMenu.add(closeAction);
        mi.setMnemonic(getButtonMnemonic("close"));
    }

    private static int getButtonMnemonic(String button) {
        try {
            return Integer.parseInt(UIManager.getString(
                    "InternalFrameTitlePane." + button + "Button.mnemonic"));
        } catch (NumberFormatException e) {
            return -1;
        }
    }

    Returns a new instance of JMenu. 
Returns: a new instance of JMenu/**
     * Returns a new instance of {@code JMenu}.
     *
     * @return a new instance of {@code JMenu}
     */
    protected JMenu createSystemMenu() {
        return new JMenu("    ");
    }

    Returns a new instance of JMenuBar. 
Returns: a new instance of JMenuBar/**
     * Returns a new instance of {@code JMenuBar}.
     *
     * @return a new instance of {@code JMenuBar}
     */
    protected JMenuBar createSystemMenuBar() {
        menuBar = new SystemMenuBar();
        menuBar.setBorderPainted(false);
        return menuBar;
    }

    Shows system menu.
/**
     * Shows system menu.
     */
    protected void showSystemMenu(){
        //      windowMenu.setPopupMenuVisible(true);
      //      windowMenu.setVisible(true);
      windowMenu.doClick();
    }

    public void paintComponent(Graphics g)  {
        paintTitleBackground(g);

        if(frame.getTitle() != null) {
            boolean isSelected = frame.isSelected();
            Font f = g.getFont();
            g.setFont(getFont());
            if(isSelected)
                g.setColor(selectedTextColor);
            else
                g.setColor(notSelectedTextColor);

            // Center text vertically.
            FontMetrics fm = SwingUtilities2.getFontMetrics(frame, g);
            int baseline = (getHeight() + fm.getAscent() - fm.getLeading() -
                    fm.getDescent()) / 2;

            int titleX;
            Rectangle r = new Rectangle(0, 0, 0, 0);
            if (frame.isIconifiable())  r = iconButton.getBounds();
            else if (frame.isMaximizable())  r = maxButton.getBounds();
            else if (frame.isClosable())  r = closeButton.getBounds();
            int titleW;

            String title = frame.getTitle();
            if( BasicGraphicsUtils.isLeftToRight(frame) ) {
              if (r.x == 0)  r.x = frame.getWidth()-frame.getInsets().right;
              titleX = menuBar.getX() + menuBar.getWidth() + 2;
              titleW = r.x - titleX - 3;
              title = getTitle(frame.getTitle(), fm, titleW);
            } else {
                titleX = menuBar.getX() - 2
                         - SwingUtilities2.stringWidth(frame,fm,title);
            }

            SwingUtilities2.drawString(frame, g, title, titleX, baseline);
            g.setFont(f);
        }
    }

   Invoked from paintComponent.
Paints the background of the titlepane.  All text and icons will
then be rendered on top of this background.
Params: g – the graphics to use to render the background
Since: 1.4/**
    * Invoked from paintComponent.
    * Paints the background of the titlepane.  All text and icons will
    * then be rendered on top of this background.
    * @param g the graphics to use to render the background
    * @since 1.4
    */
    protected void paintTitleBackground(Graphics g) {
        boolean isSelected = frame.isSelected();

        if(isSelected)
            g.setColor(selectedTitleColor);
        else
            g.setColor(notSelectedTitleColor);
        g.fillRect(0, 0, getWidth(), getHeight());
    }

    Returns the title.
Params: text – a text
fm – an instance of FontMetrics
availTextWidth – an available text width
Returns: the title./**
     * Returns the title.
     *
     * @param text a text
     * @param fm an instance of {@code FontMetrics}
     * @param availTextWidth an available text width
     * @return the title.
     */
    protected String getTitle(String text, FontMetrics fm, int availTextWidth) {
        return SwingUtilities2.clipStringIfNecessary(
                           frame, fm, text, availTextWidth);
    }

    Post a WINDOW_CLOSING-like event to the frame, so that it can be treated like a regular Frame. 
Params: frame – an instance of JInternalFrame/**
     * Post a WINDOW_CLOSING-like event to the frame, so that it can
     * be treated like a regular {@code Frame}.
     *
     * @param frame an instance of {@code JInternalFrame}
     */
    protected void postClosingEvent(JInternalFrame frame) {
        InternalFrameEvent e = new InternalFrameEvent(
            frame, InternalFrameEvent.INTERNAL_FRAME_CLOSING);
        // Try posting event, unless there's a SecurityManager.
        try {
            Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(e);
        } catch (SecurityException se) {
            frame.dispatchEvent(e);
        }
    }

    Enables actions.
/**
     * Enables actions.
     */
    protected void enableActions() {
        restoreAction.setEnabled(frame.isMaximum() || frame.isIcon());
        maximizeAction.setEnabled(
            (frame.isMaximizable() && !frame.isMaximum() && !frame.isIcon()) ||
            (frame.isMaximizable() && frame.isIcon()));
        iconifyAction.setEnabled(frame.isIconifiable() && !frame.isIcon());
        closeAction.setEnabled(frame.isClosable());
        sizeAction.setEnabled(false);
        moveAction.setEnabled(false);
    }

    private Handler getHandler() {
        if (handler == null) {
            handler = new Handler();
        }
        return handler;
    }

    Returns an instance of PropertyChangeListener. 
Returns: an instance of PropertyChangeListener/**
     * Returns an instance of {@code PropertyChangeListener}.
     *
     * @return an instance of {@code PropertyChangeListener}
     */
    protected PropertyChangeListener createPropertyChangeListener() {
        return getHandler();
    }

    Returns a layout manager.
Returns: a layout manager/**
     * Returns a layout manager.
     *
     * @return a layout manager
     */
    protected LayoutManager createLayout() {
        return getHandler();
    }


    private class Handler implements LayoutManager, PropertyChangeListener {
        //
        // PropertyChangeListener
        //
        public void propertyChange(PropertyChangeEvent evt) {
            String prop = evt.getPropertyName();

            if (prop == JInternalFrame.IS_SELECTED_PROPERTY) {
                repaint();
                return;
            }

            if (prop == JInternalFrame.IS_ICON_PROPERTY ||
                    prop == JInternalFrame.IS_MAXIMUM_PROPERTY) {
                setButtonIcons();
                enableActions();
                return;
            }

            if ("closable" == prop) {
                if (evt.getNewValue() == Boolean.TRUE) {
                    add(closeButton);
                } else {
                    remove(closeButton);
                }
            } else if ("maximizable" == prop) {
                if (evt.getNewValue() == Boolean.TRUE) {
                    add(maxButton);
                } else {
                    remove(maxButton);
                }
            } else if ("iconable" == prop) {
                if (evt.getNewValue() == Boolean.TRUE) {
                    add(iconButton);
                } else {
                    remove(iconButton);
                }
            }
            enableActions();

            revalidate();
            repaint();
        }


        //
        // LayoutManager
        //
        public void addLayoutComponent(String name, Component c) {}
        public void removeLayoutComponent(Component c) {}
        public Dimension preferredLayoutSize(Container c) {
            return minimumLayoutSize(c);
        }

        public Dimension minimumLayoutSize(Container c) {
            // Calculate width.
            int width = 22;

            if (frame.isClosable()) {
                width += 19;
            }
            if (frame.isMaximizable()) {
                width += 19;
            }
            if (frame.isIconifiable()) {
                width += 19;
            }

            FontMetrics fm = frame.getFontMetrics(getFont());
            String frameTitle = frame.getTitle();
            int title_w = frameTitle != null ? SwingUtilities2.stringWidth(
                               frame, fm, frameTitle) : 0;
            int title_length = frameTitle != null ? frameTitle.length() : 0;

            // Leave room for three characters in the title.
            if (title_length > 3) {
                int subtitle_w = SwingUtilities2.stringWidth(
                    frame, fm, frameTitle.substring(0, 3) + "...");
                width += (title_w < subtitle_w) ? title_w : subtitle_w;
            } else {
                width += title_w;
            }

            // Calculate height.
            Icon icon = frame.getFrameIcon();
            int fontHeight = fm.getHeight();
            fontHeight += 2;
            int iconHeight = 0;
            if (icon != null) {
                // SystemMenuBar forces the icon to be 16x16 or less.
                iconHeight = Math.min(icon.getIconHeight(), 16);
            }
            iconHeight += 2;

            int height = Math.max( fontHeight, iconHeight );

            Dimension dim = new Dimension(width, height);

            // Take into account the border insets if any.
            if (getBorder() != null) {
                Insets insets = getBorder().getBorderInsets(c);
                dim.height += insets.top + insets.bottom;
                dim.width += insets.left + insets.right;
            }
            return dim;
        }

        public void layoutContainer(Container c) {
            boolean leftToRight = BasicGraphicsUtils.isLeftToRight(frame);

            int w = getWidth();
            int h = getHeight();
            int x;

            int buttonHeight = closeButton.getIcon().getIconHeight();

            Icon icon = frame.getFrameIcon();
            int iconHeight = 0;
            if (icon != null) {
                iconHeight = icon.getIconHeight();
            }
            x = (leftToRight) ? 2 : w - 16 - 2;
            menuBar.setBounds(x, (h - iconHeight) / 2, 16, 16);

            x = (leftToRight) ? w - 16 - 2 : 2;

            if (frame.isClosable()) {
                closeButton.setBounds(x, (h - buttonHeight) / 2, 16, 14);
                x += (leftToRight) ? -(16 + 2) : 16 + 2;
            }

            if (frame.isMaximizable()) {
                maxButton.setBounds(x, (h - buttonHeight) / 2, 16, 14);
                x += (leftToRight) ? -(16 + 2) : 16 + 2;
            }

            if (frame.isIconifiable()) {
                iconButton.setBounds(x, (h - buttonHeight) / 2, 16, 14);
            }
        }
    }

    This class should be treated as a "protected" inner class.
Instantiate it only within subclasses of Foo.
/**
     * This class should be treated as a &quot;protected&quot; inner class.
     * Instantiate it only within subclasses of <code>Foo</code>.
     */
    public class PropertyChangeHandler implements PropertyChangeListener {
        Constructs a PropertyChangeHandler. /**
         * Constructs a {@code PropertyChangeHandler}.
         */
        public PropertyChangeHandler() {}

        // NOTE: This class exists only for backward compatibility. All
        // its functionality has been moved into Handler. If you need to add
        // new functionality add it to the Handler, but make sure this
        // class calls into the Handler.
        public void propertyChange(PropertyChangeEvent evt) {
            getHandler().propertyChange(evt);
        }
    }

    This class should be treated as a "protected" inner class.
Instantiate it only within subclasses of Foo.
/**
     * This class should be treated as a &quot;protected&quot; inner class.
     * Instantiate it only within subclasses of <code>Foo</code>.
     */
    public class TitlePaneLayout implements LayoutManager {
        // NOTE: This class exists only for backward compatibility. All
        // its functionality has been moved into Handler. If you need to add
        // new functionality add it to the Handler, but make sure this
        // class calls into the Handler.
        Constructs a TitlePaneLayout. /**
         * Constructs a {@code TitlePaneLayout}.
         */
        public TitlePaneLayout() {}

        public void addLayoutComponent(String name, Component c) {
            getHandler().addLayoutComponent(name, c);
        }

        public void removeLayoutComponent(Component c) {
            getHandler().removeLayoutComponent(c);
        }

        public Dimension preferredLayoutSize(Container c)  {
            return getHandler().preferredLayoutSize(c);
        }

        public Dimension minimumLayoutSize(Container c) {
            return getHandler().minimumLayoutSize(c);
        }

        public void layoutContainer(Container c) {
            getHandler().layoutContainer(c);
        }
    }

    This class should be treated as a "protected" inner class.
Instantiate it only within subclasses of Foo.
/**
     * This class should be treated as a &quot;protected&quot; inner class.
     * Instantiate it only within subclasses of <code>Foo</code>.
     */
    public class CloseAction extends AbstractAction {
        Constructs a new instance of a CloseAction. /**
         * Constructs a new instance of a {@code CloseAction}.
         */
        public CloseAction() {
            super(UIManager.getString(
                    "InternalFrameTitlePane.closeButtonText"));
        }

        public void actionPerformed(ActionEvent e) {
            if(frame.isClosable()) {
                frame.doDefaultCloseAction();
            }
        }
    } // end CloseAction

    This class should be treated as a "protected" inner class.
Instantiate it only within subclasses of Foo.
/**
     * This class should be treated as a &quot;protected&quot; inner class.
     * Instantiate it only within subclasses of <code>Foo</code>.
     */
    public class MaximizeAction extends AbstractAction {
        Constructs a new instance of a MaximizeAction. /**
         * Constructs a new instance of a {@code MaximizeAction}.
         */
        public MaximizeAction() {
            super(UIManager.getString(
                    "InternalFrameTitlePane.maximizeButtonText"));
        }

        public void actionPerformed(ActionEvent evt) {
            if (frame.isMaximizable()) {
                if (frame.isMaximum() && frame.isIcon()) {
                    try {
                        frame.setIcon(false);
                    } catch (PropertyVetoException e) { }
                } else if (!frame.isMaximum()) {
                    try {
                        frame.setMaximum(true);
                    } catch (PropertyVetoException e) { }
                } else {
                    try {
                        frame.setMaximum(false);
                    } catch (PropertyVetoException e) { }
                }
            }
        }
    }

    This class should be treated as a "protected" inner class.
Instantiate it only within subclasses of Foo.
/**
     * This class should be treated as a &quot;protected&quot; inner class.
     * Instantiate it only within subclasses of <code>Foo</code>.
     */
    public class IconifyAction extends AbstractAction {
        Constructs a new instance of an IconifyAction. /**
         * Constructs a new instance of an {@code IconifyAction}.
         */
        public IconifyAction() {
            super(UIManager.getString(
                    "InternalFrameTitlePane.minimizeButtonText"));
        }

        public void actionPerformed(ActionEvent e) {
            if(frame.isIconifiable()) {
              if(!frame.isIcon()) {
                try { frame.setIcon(true); } catch (PropertyVetoException e1) { }
              } else{
                try { frame.setIcon(false); } catch (PropertyVetoException e1) { }
              }
            }
        }
    } // end IconifyAction

    This class should be treated as a "protected" inner class.
Instantiate it only within subclasses of Foo.
/**
     * This class should be treated as a &quot;protected&quot; inner class.
     * Instantiate it only within subclasses of <code>Foo</code>.
     */
    public class RestoreAction extends AbstractAction {
        Constructs a new instance of a RestoreAction. /**
         * Constructs a new instance of a {@code RestoreAction}.
         */
        public RestoreAction() {
            super(UIManager.getString(
                    "InternalFrameTitlePane.restoreButtonText"));
        }

        public void actionPerformed(ActionEvent evt) {
            if (frame.isMaximizable() && frame.isMaximum() && frame.isIcon()) {
                try {
                    frame.setIcon(false);
                } catch (PropertyVetoException e) { }
            } else if (frame.isMaximizable() && frame.isMaximum()) {
                try {
                    frame.setMaximum(false);
                } catch (PropertyVetoException e) { }
            } else if (frame.isIconifiable() && frame.isIcon()) {
                try {
                    frame.setIcon(false);
                } catch (PropertyVetoException e) { }
            }
        }
    }

    This class should be treated as a "protected" inner class.
Instantiate it only within subclasses of Foo.
/**
     * This class should be treated as a &quot;protected&quot; inner class.
     * Instantiate it only within subclasses of <code>Foo</code>.
     */
    public class MoveAction extends AbstractAction {
        Constructs a new instance of a MoveAction. /**
         * Constructs a new instance of a {@code MoveAction}.
         */
        public MoveAction() {
            super(UIManager.getString(
                    "InternalFrameTitlePane.moveButtonText"));
        }

        public void actionPerformed(ActionEvent e) {
            // This action is currently undefined
        }
    } // end MoveAction

    /*
     * Handles showing and hiding the system menu.
     */
    private class ShowSystemMenuAction extends AbstractAction {
        private boolean show;   // whether to show the menu

        public ShowSystemMenuAction(boolean show) {
            this.show = show;
        }

        public void actionPerformed(ActionEvent e) {
            if (show) {
                windowMenu.doClick();
            } else {
                windowMenu.setVisible(false);
            }
        }
    }

    This class should be treated as a "protected" inner class.
Instantiate it only within subclasses of Foo.
/**
     * This class should be treated as a &quot;protected&quot; inner class.
     * Instantiate it only within subclasses of <code>Foo</code>.
     */
    public class SizeAction extends AbstractAction {
        Constructs a new instance of a SizeAction. /**
         * Constructs a new instance of a {@code SizeAction}.
         */
        public SizeAction() {
            super(UIManager.getString(
                    "InternalFrameTitlePane.sizeButtonText"));
        }

        public void actionPerformed(ActionEvent e) {
            // This action is currently undefined
        }
    } // end SizeAction


    This class should be treated as a "protected" inner class.
Instantiate it only within subclasses of Foo.
/**
     * This class should be treated as a &quot;protected&quot; inner class.
     * Instantiate it only within subclasses of <code>Foo</code>.
     */
    @SuppressWarnings("deprecation")
    public class SystemMenuBar extends JMenuBar {
        Constructs a SystemMenuBar. /**
         * Constructs a {@code SystemMenuBar}.
         */
        public SystemMenuBar() {}
        public boolean isFocusTraversable() { return false; }
        public void requestFocus() {}
        public void paint(Graphics g) {
            Icon icon = frame.getFrameIcon();
            if (icon == null) {
              icon = (Icon)DefaultLookup.get(frame, frame.getUI(),
                      "InternalFrame.icon");
            }
            if (icon != null) {
                // Resize to 16x16 if necessary.
                if (icon instanceof ImageIcon && (icon.getIconWidth() > 16 || icon.getIconHeight() > 16)) {
                    Image img = ((ImageIcon)icon).getImage();
                    ((ImageIcon)icon).setImage(img.getScaledInstance(16, 16, Image.SCALE_SMOOTH));
                }
                icon.paintIcon(this, g, 0, 0);
            }
        }

        public boolean isOpaque() {
            return true;
        }
    } // end SystemMenuBar


    private class NoFocusButton extends JButton {
        private String uiKey;
        public NoFocusButton(String uiKey, String opacityKey) {
            setFocusPainted(false);
            setMargin(new Insets(0,0,0,0));
            this.uiKey = uiKey;

            Object opacity = UIManager.get(opacityKey);
            if (opacity instanceof Boolean) {
                setOpaque(((Boolean)opacity).booleanValue());
            }
        }
        @SuppressWarnings("deprecation")
        public boolean isFocusTraversable() { return false; }
        public void requestFocus() {}
        public AccessibleContext getAccessibleContext() {
            AccessibleContext ac = super.getAccessibleContext();
            if (uiKey != null) {
                ac.setAccessibleName(UIManager.getString(uiKey));
                uiKey = null;
            }
            return ac;
        }
    }  // end NoFocusButton

}   // End Title Pane Class
Params:	g – the graphics to use to render the background
Since:	1.4
Params:	text – a text fm – an instance of `FontMetrics` availTextWidth – an available text width
Returns:	the title.
/

java/ 16/ java.desktop/javax/swing/plaf/basic/BasicInternalFrameTitlePane.java
