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/* JRootPane.java -- Copyright (C) 2002, 2004 Free Software Foundation, Inc.This file is part of GNU Classpath.GNU Classpath is free software; you can redistribute it and/or modifyit under the terms of the GNU General Public License as published bythe 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, butWITHOUT ANY WARRANTY; without even the implied warranty ofMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNUGeneral Public License for more details.You should have received a copy of the GNU General Public Licensealong with GNU Classpath; see the file COPYING. If not, write to theFree Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA02110-1301 USA.Linking this library statically or dynamically with other modules ismaking a combined work based on this library. Thus, the terms andconditions of the GNU General Public License cover the wholecombination.As a special exception, the copyright holders of this library give youpermission to link this library with independent modules to produce anexecutable, regardless of the license terms of these independentmodules, and to copy and distribute the resulting executable underterms of your choice, provided that you also meet, for each linkedindependent module, the terms and conditions of the license of thatmodule. An independent module is a module which is not derived fromor based on this library. If you modify this library, you may extendthis exception to your version of the library, but you are notobligated to do so. If you do not wish to do so, delete thisexception statement from your version. */package javax.swing;import java.awt.BorderLayout;import java.awt.Component;import java.awt.Container;import java.awt.Dimension;import java.awt.IllegalComponentStateException;import java.awt.Insets;import java.awt.LayoutManager;import java.awt.LayoutManager2;import java.awt.Rectangle;import java.io.Serializable;import javax.accessibility.Accessible;import javax.accessibility.AccessibleRole;import javax.swing.plaf.RootPaneUI;/** * This class is where JComponents are added to. Unlike awt where you could * just say frame.add(), with swing you need to say frame.getRootPane() * (which delivers an instance of this class) and add your components to * that. It is implemented by several 'layers' (pane() should be read as * plane()) each on top of the others where you can add components to. * (getContentPane(), getGlassPane(), getLayeredPane()) * * @author Ronald Veldema ([e-mail]) */public class JRootPane extends JComponent implements Accessible{ // The class used to obtain the accessible role for this object. protected class AccessibleJRootPane extends AccessibleJComponent { /** * For compatability with Sun's JDK */ private static final long serialVersionUID = 1082432482784468088L; /** * Creates a new AccessibleJRootPane object. */ protected AccessibleJRootPane() { // Nothing to do here. } /** * DOCUMENT ME! * * @return DOCUMENT ME! */ public AccessibleRole getAccessibleRole() { return AccessibleRole.ROOT_PANE; } } // Custom Layout Manager for JRootPane. It positions contentPane and // menuBar withing its layeredPane. protected class RootLayout implements LayoutManager2, Serializable { /** DOCUMENT ME! */ private static final long serialVersionUID = -4100116998559815027L; /** * The cached layout info for the glass pane. */ private Rectangle glassPaneBounds; /** * The cached layout info for the layered pane. */ private Rectangle layeredPaneBounds; /** * The cached layout info for the content pane. */ private Rectangle contentPaneBounds; /** * The cached layout info for the menu bar. */ private Rectangle menuBarBounds; /** * Creates a new RootLayout object. */ protected RootLayout() { // Nothing to do here. } /** * DOCUMENT ME! * * @param comp DOCUMENT ME! * @param constraints DOCUMENT ME! */ public void addLayoutComponent(Component comp, Object constraints) { // Nothing to do here. } /** * DOCUMENT ME! * * @param name DOCUMENT ME! * @param comp DOCUMENT ME! */ public void addLayoutComponent(String name, Component comp) { // Nothing to do here. } /** * DOCUMENT ME! * * @param target DOCUMENT ME! * * @return DOCUMENT ME! */ public float getLayoutAlignmentX(Container target) { return 0.0F; } /** * DOCUMENT ME! * * @param target DOCUMENT ME! * * @return DOCUMENT ME! */ public float getLayoutAlignmentY(Container target) { return 0.0F; } /** * DOCUMENT ME! * * @param target DOCUMENT ME! */ public void invalidateLayout(Container target) { synchronized (this) { glassPaneBounds = null; layeredPaneBounds = null; contentPaneBounds = null; menuBarBounds = null; } } /** * DOCUMENT ME! * * @param c DOCUMENT ME! */ public void layoutContainer(Container c) { if (glassPaneBounds == null || layeredPaneBounds == null || contentPaneBounds == null || menuBarBounds == null) { Insets i = getInsets(); int containerWidth = c.getBounds().width - i.left - i.right; int containerHeight = c.getBounds().height - i.top - i.bottom; // 1. the glassPane fills entire viewable region (bounds - insets). // 2. the layeredPane filles entire viewable region. // 3. the menuBar is positioned at the upper edge of layeredPane. // 4. the contentPane fills viewable region minus menuBar, if present. // +-------------------------------+ // | JLayeredPane | // | +--------------------------+ | // | | menuBar | | // | +--------------------------+ | // | +--------------------------+ | // | |contentPane | | // | | | | // | | | | // | | | | // | +--------------------------+ | // +-------------------------------+ if (menuBar != null) { Dimension menuBarSize = menuBar.getPreferredSize(); if (menuBarSize.height > containerHeight) menuBarSize.height = containerHeight; menuBarBounds = new Rectangle(0, 0, containerWidth, menuBarSize.height); contentPaneBounds = new Rectangle(0, menuBarSize.height, containerWidth, containerHeight - menuBarSize.height); } else contentPaneBounds = new Rectangle(0, 0, containerWidth, containerHeight); glassPaneBounds = new Rectangle(i.left, i.top, containerWidth, containerHeight); layeredPaneBounds = new Rectangle(i.left, i.top, containerWidth, containerHeight); } glassPane.setBounds(glassPaneBounds); layeredPane.setBounds(layeredPaneBounds); if (menuBar != null) menuBar.setBounds(menuBarBounds); getContentPane().setBounds(contentPaneBounds); } /** * DOCUMENT ME! * * @param target DOCUMENT ME! * * @return DOCUMENT ME! */ public Dimension maximumLayoutSize(Container target) { return preferredLayoutSize(target); } /** * DOCUMENT ME! * * @param target DOCUMENT ME! * * @return DOCUMENT ME! */ public Dimension minimumLayoutSize(Container target) { return preferredLayoutSize(target); } /** * DOCUMENT ME! * * @param c DOCUMENT ME! * * @return DOCUMENT ME! */ public Dimension preferredLayoutSize(Container c) { Dimension prefSize = new Dimension(); Insets i = getInsets(); prefSize = new Dimension(i.left + i.right, i.top + i.bottom); Dimension contentPrefSize = getContentPane().getPreferredSize(); prefSize.width += contentPrefSize.width; prefSize.height += contentPrefSize.height; if (menuBar != null) { Dimension menuBarSize = menuBar.getPreferredSize(); if (menuBarSize.width > contentPrefSize.width) prefSize.width += menuBarSize.width - contentPrefSize.width; prefSize.height += menuBarSize.height; } return prefSize; } /** * DOCUMENT ME! * * @param comp DOCUMENT ME! */ public void removeLayoutComponent(Component comp) { // Nothing to do here. } } /** DOCUMENT ME! */ private static final long serialVersionUID = 8690748000348575668L; public static final int NONE = 0; public static final int FRAME = 1; public static final int PLAIN_DIALOG = 2; public static final int INFORMATION_DIALOG = 3; public static final int ERROR_DIALOG = 4; public static final int COLOR_CHOOSER_DIALOG = 5; public static final int FILE_CHOOSER_DIALOG = 6; public static final int QUESTION_DIALOG = 7; public static final int WARNING_DIALOG = 8; /** DOCUMENT ME! */ protected Component glassPane; /** DOCUMENT ME! */ protected JLayeredPane layeredPane; /** DOCUMENT ME! */ protected JMenuBar menuBar; /** DOCUMENT ME! */ protected Container contentPane; protected JButton defaultButton; /** * This field is unused since JDK1.3. To override the default action you