| /* |
| * Copyright (c) 1997, 2006, 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; |
| |
| import java.awt.*; |
| import java.awt.event.*; |
| import java.applet.Applet; |
| import java.beans.PropertyChangeListener; |
| import java.util.Locale; |
| import java.util.Vector; |
| import java.io.Serializable; |
| import javax.accessibility.*; |
| |
| /** |
| * An extended version of <code>java.applet.Applet</code> that adds support for |
| * the JFC/Swing component architecture. |
| * You can find task-oriented documentation about using <code>JApplet</code> |
| * in <em>The Java Tutorial</em>, |
| * in the section |
| * <a |
| href="http://java.sun.com/docs/books/tutorial/uiswing/components/applet.html">How to Make Applets</a>. |
| * <p> |
| * The <code>JApplet</code> class is slightly incompatible with |
| * <code>java.applet.Applet</code>. <code>JApplet</code> contains a |
| * <code>JRootPane</code> as its only child. The <code>contentPane</code> |
| * should be the parent of any children of the <code>JApplet</code>. |
| * As a convenience <code>add</code> and its variants, <code>remove</code> and |
| * <code>setLayout</code> have been overridden to forward to the |
| * <code>contentPane</code> as necessary. This means you can write: |
| * <pre> |
| * applet.add(child); |
| * </pre> |
| * |
| * And the child will be added to the <code>contentPane</code>. |
| * The <code>contentPane</code> will always be non-<code>null</code>. |
| * Attempting to set it to <code>null</code> will cause the |
| * <code>JApplet</code> to throw an exception. The default |
| * <code>contentPane</code> will have a <code>BorderLayout</code> |
| * manager set on it. |
| * Refer to {@link javax.swing.RootPaneContainer} |
| * for details on adding, removing and setting the <code>LayoutManager</code> |
| * of a <code>JApplet</code>. |
| * <p> |
| * Please see the <code>JRootPane</code> documentation for a |
| * complete description of the <code>contentPane</code>, <code>glassPane</code>, |
| * and <code>layeredPane</code> properties. |
| * <p> |
| * <strong>Warning:</strong> Swing is not thread safe. For more |
| * information see <a |
| * href="package-summary.html#threading">Swing's Threading |
| * Policy</a>. |
| * <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<sup><font size="-2">TM</font></sup> |
| * has been added to the <code>java.beans</code> package. |
| * Please see {@link java.beans.XMLEncoder}. |
| * |
| * @see javax.swing.RootPaneContainer |
| * @beaninfo |
| * attribute: isContainer true |
| * attribute: containerDelegate getContentPane |
| * description: Swing's Applet subclass. |
| * |
| * @author Arnaud Weber |
| */ |
| public class JApplet extends Applet implements Accessible, |
| RootPaneContainer, |
| TransferHandler.HasGetTransferHandler |
| { |
| /** |
| * @see #getRootPane |
| * @see #setRootPane |
| */ |
| protected JRootPane rootPane; |
| |
| /** |
| * If true then calls to <code>add</code> and <code>setLayout</code> |
| * will be forwarded to the <code>contentPane</code>. This is initially |
| * false, but is set to true when the <code>JApplet</code> is constructed. |
| * |
| * @see #isRootPaneCheckingEnabled |
| * @see #setRootPaneCheckingEnabled |
| * @see javax.swing.RootPaneContainer |
| */ |
| protected boolean rootPaneCheckingEnabled = false; |
| |
| /** |
| * The <code>TransferHandler</code> for this applet. |
| */ |
| private TransferHandler transferHandler; |
| |
| /** |
| * Creates a swing applet instance. |
| * <p> |
| * This constructor sets the component's locale property to the value |
| * returned by <code>JComponent.getDefaultLocale</code>. |
| * |
| * @exception HeadlessException if GraphicsEnvironment.isHeadless() |
| * returns true. |
| * @see java.awt.GraphicsEnvironment#isHeadless |
| * @see JComponent#getDefaultLocale |
| */ |
| public JApplet() throws HeadlessException { |
| super(); |
| // Check the timerQ and restart if necessary. |
| TimerQueue q = TimerQueue.sharedInstance(); |
| if(q != null) { |
| q.startIfNeeded(); |
| } |
| |
| /* Workaround for bug 4155072. The shared double buffer image |
| * may hang on to a reference to this applet; unfortunately |
| * Image.getGraphics() will continue to call JApplet.getForeground() |
| * and getBackground() even after this applet has been destroyed. |
| * So we ensure that these properties are non-null here. |
| */ |
| setForeground(Color.black); |
| setBackground(Color.white); |
| |
| setLocale( JComponent.getDefaultLocale() ); |
| setLayout(new BorderLayout()); |
| setRootPane(createRootPane()); |
| setRootPaneCheckingEnabled(true); |
| |
| setFocusTraversalPolicyProvider(true); |
| sun.awt.SunToolkit.checkAndSetPolicy(this); |
| |
| enableEvents(AWTEvent.KEY_EVENT_MASK); |
| } |
| |
| |
| /** Called by the constructor methods to create the default rootPane. */ |
| protected JRootPane createRootPane() { |
| JRootPane rp = new JRootPane(); |
| // NOTE: this uses setOpaque vs LookAndFeel.installProperty as there |
| // is NO reason for the RootPane not to be opaque. For painting to |
| // work the contentPane must be opaque, therefor the RootPane can |
| // also be opaque. |
| rp.setOpaque(true); |
| return rp; |
| } |
| |
| /** |
| * Sets the {@code transferHandler} property, which is a mechanism to |
| * support transfer of data into this component. Use {@code null} |
| * if the component does not support data transfer operations. |
| * <p> |
| * If the system property {@code suppressSwingDropSupport} is {@code false} |
| * (the default) and the current drop target on this component is either |
| * {@code null} or not a user-set drop target, this method will change the |
| * drop target as follows: If {@code newHandler} is {@code null} it will |
| * clear the drop target. If not {@code null} it will install a new |
| * {@code DropTarget}. |
| * <p> |
| * Note: When used with {@code JApplet}, {@code TransferHandler} only |
| * provides data import capability, as the data export related methods |
| * are currently typed to {@code JComponent}. |
| * <p> |
| * Please see |
| * <a href="http://java.sun.com/docs/books/tutorial/uiswing/misc/dnd.html"> |
| * How to Use Drag and Drop and Data Transfer</a>, a section in |
| * <em>The Java Tutorial</em>, for more information. |
| * |
| * @param newHandler the new {@code TransferHandler} |
| * |
| * @see TransferHandler |
| * @see #getTransferHandler |
| * @see java.awt.Component#setDropTarget |
| * @since 1.6 |
| * |
| * @beaninfo |
| * bound: true |
| * hidden: true |
| * description: Mechanism for transfer of data into the component |
| */ |
| public void setTransferHandler(TransferHandler newHandler) { |
| TransferHandler oldHandler = transferHandler; |
| transferHandler = newHandler; |
| SwingUtilities.installSwingDropTargetAsNecessary(this, transferHandler); |
| firePropertyChange("transferHandler", oldHandler, newHandler); |
| } |
| |
| /** |
| * Gets the <code>transferHandler</code> property. |
| * |
| * @return the value of the <code>transferHandler</code> property |
| * |
| * @see TransferHandler |
| * @see #setTransferHandler |
| * @since 1.6 |
| */ |
| public TransferHandler getTransferHandler() { |
| return transferHandler; |
| } |
| |
| /** |
| * Just calls <code>paint(g)</code>. This method was overridden to |
| * prevent an unnecessary call to clear the background. |
| */ |
| public void update(Graphics g) { |
| paint(g); |
| } |
| |
| /** |
| * Sets the menubar for this applet. |
| * @param menuBar the menubar being placed in the applet |
| * |
| * @see #getJMenuBar |
| * |
| * @beaninfo |
| * hidden: true |
| * description: The menubar for accessing pulldown menus from this applet. |
| */ |
| public void setJMenuBar(JMenuBar menuBar) { |
| getRootPane().setMenuBar(menuBar); |
| } |
| |
| /** |
| * Returns the menubar set on this applet. |
| * |
| * @see #setJMenuBar |
| */ |
| public JMenuBar getJMenuBar() { |
| return getRootPane().getMenuBar(); |
| } |
| |
| |
| /** |
| * Returns whether calls to <code>add</code> and |
| * <code>setLayout</code> are forwarded to the <code>contentPane</code>. |
| * |
| * @return true if <code>add</code> and <code>setLayout</code> |
| * are fowarded; false otherwise |
| * |
| * @see #addImpl |
| * @see #setLayout |
| * @see #setRootPaneCheckingEnabled |
| * @see javax.swing.RootPaneContainer |
| */ |
| protected boolean isRootPaneCheckingEnabled() { |
| return rootPaneCheckingEnabled; |
| } |
| |
| |
| /** |
| * Sets whether calls to <code>add</code> and |
| * <code>setLayout</code> are forwarded to the <code>contentPane</code>. |
| * |
| * @param enabled true if <code>add</code> and <code>setLayout</code> |
| * are forwarded, false if they should operate directly on the |
| * <code>JApplet</code>. |
| * |
| * @see #addImpl |
| * @see #setLayout |
| * @see #isRootPaneCheckingEnabled |
| * @see javax.swing.RootPaneContainer |
| * @beaninfo |
| * hidden: true |
| * description: Whether the add and setLayout methods are forwarded |
| */ |
| protected void setRootPaneCheckingEnabled(boolean enabled) { |
| rootPaneCheckingEnabled = enabled; |
| } |
| |
| |
| /** |
| * Adds the specified child <code>Component</code>. |
| * This method is overridden to conditionally forward calls to the |
| * <code>contentPane</code>. |
| * By default, children are added to the <code>contentPane</code> instead |
| * of the frame, refer to {@link javax.swing.RootPaneContainer} for |
| * details. |
| * |
| * @param comp the component to be enhanced |
| * @param constraints the constraints to be respected |
| * @param index the index |
| * @exception IllegalArgumentException if <code>index</code> is invalid |
| * @exception IllegalArgumentException if adding the container's parent |
| * to itself |
| * @exception IllegalArgumentException if adding a window to a container |
| * |
| * @see #setRootPaneCheckingEnabled |
| * @see javax.swing.RootPaneContainer |
| */ |
| protected void addImpl(Component comp, Object constraints, int index) |
| { |
| if(isRootPaneCheckingEnabled()) { |
| getContentPane().add(comp, constraints, index); |
| } |
| else { |
| super.addImpl(comp, constraints, index); |
| } |
| } |
| |
| /** |
| * Removes the specified component from the container. If |
| * <code>comp</code> is not the <code>rootPane</code>, this will forward |
| * the call to the <code>contentPane</code>. This will do nothing if |
| * <code>comp</code> is not a child of the <code>JFrame</code> or |
| * <code>contentPane</code>. |
| * |
| * @param comp the component to be removed |
| * @throws NullPointerException if <code>comp</code> is null |
| * @see #add |
| * @see javax.swing.RootPaneContainer |
| */ |
| public void remove(Component comp) { |
| if (comp == rootPane) { |
| super.remove(comp); |
| } else { |
| getContentPane().remove(comp); |
| } |
| } |
| |
| |
| /** |
| * Sets the <code>LayoutManager</code>. |
| * Overridden to conditionally forward the call to the |
| * <code>contentPane</code>. |
| * Refer to {@link javax.swing.RootPaneContainer} for |
| * more information. |
| * |
| * @param manager the <code>LayoutManager</code> |
| * @see #setRootPaneCheckingEnabled |
| * @see javax.swing.RootPaneContainer |
| */ |
| public void setLayout(LayoutManager manager) { |
| if(isRootPaneCheckingEnabled()) { |
| getContentPane().setLayout(manager); |
| } |
| else { |
| super.setLayout(manager); |
| } |
| } |
| |
| |
| /** |
| * Returns the rootPane object for this applet. |
| * |
| * @see #setRootPane |
| * @see RootPaneContainer#getRootPane |
| */ |
| public JRootPane getRootPane() { |
| return rootPane; |
| } |
| |
| |
| /** |
| * Sets the rootPane property. This method is called by the constructor. |
| * @param root the rootPane object for this applet |
| * |
| * @see #getRootPane |
| * |
| * @beaninfo |
| * hidden: true |
| * description: the RootPane object for this applet. |
| */ |
| protected void setRootPane(JRootPane root) { |
| if(rootPane != null) { |
| remove(rootPane); |
| } |
| rootPane = root; |
| if(rootPane != null) { |
| boolean checkingEnabled = isRootPaneCheckingEnabled(); |
| try { |
| setRootPaneCheckingEnabled(false); |
| add(rootPane, BorderLayout.CENTER); |
| } |
| finally { |
| setRootPaneCheckingEnabled(checkingEnabled); |
| } |
| } |
| } |
| |
| |
| /** |
| * Returns the contentPane object for this applet. |
| * |
| * @see #setContentPane |
| * @see RootPaneContainer#getContentPane |
| */ |
| public Container getContentPane() { |
| return getRootPane().getContentPane(); |
| } |
| |
| /** |
| * Sets the contentPane property. This method is called by the constructor. |
| * @param contentPane the contentPane object for this applet |
| * |
| * @exception java.awt.IllegalComponentStateException (a runtime |
| * exception) if the content pane parameter is null |
| * @see #getContentPane |
| * @see RootPaneContainer#setContentPane |
| * |
| * @beaninfo |
| * hidden: true |
| * description: The client area of the applet where child |
| * components are normally inserted. |
| */ |
| public void setContentPane(Container contentPane) { |
| getRootPane().setContentPane(contentPane); |
| } |
| |
| /** |
| * Returns the layeredPane object for this applet. |
| * |
| * @exception java.awt.IllegalComponentStateException (a runtime |
| * exception) if the layered pane parameter is null |
| * @see #setLayeredPane |
| * @see RootPaneContainer#getLayeredPane |
| */ |
| public JLayeredPane getLayeredPane() { |
| return getRootPane().getLayeredPane(); |
| } |
| |
| /** |
| * Sets the layeredPane property. This method is called by the constructor. |
| * @param layeredPane the layeredPane object for this applet |
| * |
| * @see #getLayeredPane |
| * @see RootPaneContainer#setLayeredPane |
| * |
| * @beaninfo |
| * hidden: true |
| * description: The pane which holds the various applet layers. |
| */ |
| public void setLayeredPane(JLayeredPane layeredPane) { |
| getRootPane().setLayeredPane(layeredPane); |
| } |
| |
| /** |
| * Returns the glassPane object for this applet. |
| * |
| * @see #setGlassPane |
| * @see RootPaneContainer#getGlassPane |
| */ |
| public Component getGlassPane() { |
| return getRootPane().getGlassPane(); |
| } |
| |
| /** |
| * Sets the glassPane property. |
| * This method is called by the constructor. |
| * @param glassPane the glassPane object for this applet |
| * |
| * @see #getGlassPane |
| * @see RootPaneContainer#setGlassPane |
| * |
| * @beaninfo |
| * hidden: true |
| * description: A transparent pane used for menu rendering. |
| */ |
| public void setGlassPane(Component glassPane) { |
| getRootPane().setGlassPane(glassPane); |
| } |
| |
| /** |
| * {@inheritDoc} |
| * |
| * @since 1.6 |
| */ |
| public Graphics getGraphics() { |
| JComponent.getGraphicsInvoked(this); |
| return super.getGraphics(); |
| } |
| |
| /** |
| * Repaints the specified rectangle of this component within |
| * <code>time</code> milliseconds. Refer to <code>RepaintManager</code> |
| * for details on how the repaint is handled. |
| * |
| * @param time maximum time in milliseconds before update |
| * @param x the <i>x</i> coordinate |
| * @param y the <i>y</i> coordinate |
| * @param width the width |
| * @param height the height |
| * @see RepaintManager |
| * @since 1.6 |
| */ |
| public void repaint(long time, int x, int y, int width, int height) { |
| if (RepaintManager.HANDLE_TOP_LEVEL_PAINT) { |
| RepaintManager.currentManager(this).addDirtyRegion( |
| this, x, y, width, height); |
| } |
| else { |
| super.repaint(time, x, y, width, height); |
| } |
| } |
| |
| /** |
| * Returns a string representation of this JApplet. This method |
| * is intended to be used only for debugging purposes, and the |
| * content and format of the returned string may vary between |
| * implementations. The returned string may be empty but may not |
| * be <code>null</code>. |
| * |
| * @return a string representation of this JApplet. |
| */ |
| protected String paramString() { |
| String rootPaneString = (rootPane != null ? |
| rootPane.toString() : ""); |
| String rootPaneCheckingEnabledString = (rootPaneCheckingEnabled ? |
| "true" : "false"); |
| |
| return super.paramString() + |
| ",rootPane=" + rootPaneString + |
| ",rootPaneCheckingEnabled=" + rootPaneCheckingEnabledString; |
| } |
| |
| |
| |
| ///////////////// |
| // Accessibility support |
| //////////////// |
| |
| protected AccessibleContext accessibleContext = null; |
| |
| /** |
| * Gets the AccessibleContext associated with this JApplet. |
| * For JApplets, the AccessibleContext takes the form of an |
| * AccessibleJApplet. |
| * A new AccessibleJApplet instance is created if necessary. |
| * |
| * @return an AccessibleJApplet that serves as the |
| * AccessibleContext of this JApplet |
| */ |
| public AccessibleContext getAccessibleContext() { |
| if (accessibleContext == null) { |
| accessibleContext = new AccessibleJApplet(); |
| } |
| return accessibleContext; |
| } |
| |
| /** |
| * This class implements accessibility support for the |
| * <code>JApplet</code> class. |
| */ |
| protected class AccessibleJApplet extends AccessibleApplet { |
| // everything moved to new parent, AccessibleApplet |
| } |
| } |
