--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/java/awt/Toolkit.java Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,2553 @@
+/*
+ * Copyright 1995-2007 Sun Microsystems, Inc. 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. Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package java.awt;
+
+import java.beans.PropertyChangeEvent;
+import java.util.MissingResourceException;
+import java.util.Properties;
+import java.util.ResourceBundle;
+import java.util.StringTokenizer;
+import java.awt.event.*;
+import java.awt.peer.*;
+import java.awt.im.InputMethodHighlight;
+import java.awt.image.ImageObserver;
+import java.awt.image.ImageProducer;
+import java.awt.image.ColorModel;
+import java.awt.datatransfer.Clipboard;
+import java.awt.dnd.DragSource;
+import java.awt.dnd.DragGestureRecognizer;
+import java.awt.dnd.DragGestureEvent;
+import java.awt.dnd.DragGestureListener;
+import java.awt.dnd.InvalidDnDOperationException;
+import java.awt.dnd.peer.DragSourceContextPeer;
+import java.net.URL;
+import java.io.File;
+import java.io.FileInputStream;
+
+import java.util.*;
+import java.util.logging.*;
+
+import java.beans.PropertyChangeListener;
+import java.beans.PropertyChangeSupport;
+import sun.awt.AppContext;
+
+import sun.awt.HeadlessToolkit;
+import sun.awt.NullComponentPeer;
+import sun.awt.PeerEvent;
+import sun.awt.SunToolkit;
+import sun.security.util.SecurityConstants;
+
+import sun.util.CoreResourceBundleControl;
+
+/**
+ * This class is the abstract superclass of all actual
+ * implementations of the Abstract Window Toolkit. Subclasses of
+ * the <code>Toolkit</code> class are used to bind the various components
+ * to particular native toolkit implementations.
+ * <p>
+ * Many GUI events may be delivered to user
+ * asynchronously, if the opposite is not specified explicitly.
+ * As well as
+ * many GUI operations may be performed asynchronously.
+ * This fact means that if the state of a component is set, and then
+ * the state immediately queried, the returned value may not yet
+ * reflect the requested change. This behavior includes, but is not
+ * limited to:
+ * <ul>
+ * <li>Scrolling to a specified position.
+ * <br>For example, calling <code>ScrollPane.setScrollPosition</code>
+ * and then <code>getScrollPosition</code> may return an incorrect
+ * value if the original request has not yet been processed.
+ * <p>
+ * <li>Moving the focus from one component to another.
+ * <br>For more information, see
+ * <a href="http://java.sun.com/docs/books/tutorial/uiswing/misc/focus.html#transferTiming">Timing
+ * Focus Transfers</a>, a section in
+ * <a href="http://java.sun.com/docs/books/tutorial/uiswing/">The Swing
+ * Tutorial</a>.
+ * <p>
+ * <li>Making a top-level container visible.
+ * <br>Calling <code>setVisible(true)</code> on a <code>Window</code>,
+ * <code>Frame</code> or <code>Dialog</code> may occur
+ * asynchronously.
+ * <p>
+ * <li>Setting the size or location of a top-level container.
+ * <br>Calls to <code>setSize</code>, <code>setBounds</code> or
+ * <code>setLocation</code> on a <code>Window</code>,
+ * <code>Frame</code> or <code>Dialog</code> are forwarded
+ * to the underlying window management system and may be
+ * ignored or modified. See {@link java.awt.Window} for
+ * more information.
+ * </ul>
+ * <p>
+ * Most applications should not call any of the methods in this
+ * class directly. The methods defined by <code>Toolkit</code> are
+ * the "glue" that joins the platform-independent classes in the
+ * <code>java.awt</code> package with their counterparts in
+ * <code>java.awt.peer</code>. Some methods defined by
+ * <code>Toolkit</code> query the native operating system directly.
+ *
+ * @author Sami Shaio
+ * @author Arthur van Hoff
+ * @author Fred Ecks
+ * @since JDK1.0
+ */
+public abstract class Toolkit {
+
+ /**
+ * Creates this toolkit's implementation of the <code>Desktop</code>
+ * using the specified peer interface.
+ * @param target the desktop to be implemented
+ * @return this toolkit's implementation of the <code>Desktop</code>
+ * @exception HeadlessException if GraphicsEnvironment.isHeadless()
+ * returns true
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ * @see java.awt.Desktop
+ * @see java.awt.peer.DesktopPeer
+ * @since 1.6
+ */
+ protected abstract DesktopPeer createDesktopPeer(Desktop target)
+ throws HeadlessException;
+
+
+ /**
+ * Creates this toolkit's implementation of <code>Button</code> using
+ * the specified peer interface.
+ * @param target the button to be implemented.
+ * @return this toolkit's implementation of <code>Button</code>.
+ * @exception HeadlessException if GraphicsEnvironment.isHeadless()
+ * returns true
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ * @see java.awt.Button
+ * @see java.awt.peer.ButtonPeer
+ */
+ protected abstract ButtonPeer createButton(Button target)
+ throws HeadlessException;
+
+ /**
+ * Creates this toolkit's implementation of <code>TextField</code> using
+ * the specified peer interface.
+ * @param target the text field to be implemented.
+ * @return this toolkit's implementation of <code>TextField</code>.
+ * @exception HeadlessException if GraphicsEnvironment.isHeadless()
+ * returns true
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ * @see java.awt.TextField
+ * @see java.awt.peer.TextFieldPeer
+ */
+ protected abstract TextFieldPeer createTextField(TextField target)
+ throws HeadlessException;
+
+ /**
+ * Creates this toolkit's implementation of <code>Label</code> using
+ * the specified peer interface.
+ * @param target the label to be implemented.
+ * @return this toolkit's implementation of <code>Label</code>.
+ * @exception HeadlessException if GraphicsEnvironment.isHeadless()
+ * returns true
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ * @see java.awt.Label
+ * @see java.awt.peer.LabelPeer
+ */
+ protected abstract LabelPeer createLabel(Label target)
+ throws HeadlessException;
+
+ /**
+ * Creates this toolkit's implementation of <code>List</code> using
+ * the specified peer interface.
+ * @param target the list to be implemented.
+ * @return this toolkit's implementation of <code>List</code>.
+ * @exception HeadlessException if GraphicsEnvironment.isHeadless()
+ * returns true
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ * @see java.awt.List
+ * @see java.awt.peer.ListPeer
+ */
+ protected abstract ListPeer createList(java.awt.List target)
+ throws HeadlessException;
+
+ /**
+ * Creates this toolkit's implementation of <code>Checkbox</code> using
+ * the specified peer interface.
+ * @param target the check box to be implemented.
+ * @return this toolkit's implementation of <code>Checkbox</code>.
+ * @exception HeadlessException if GraphicsEnvironment.isHeadless()
+ * returns true
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ * @see java.awt.Checkbox
+ * @see java.awt.peer.CheckboxPeer
+ */
+ protected abstract CheckboxPeer createCheckbox(Checkbox target)
+ throws HeadlessException;
+
+ /**
+ * Creates this toolkit's implementation of <code>Scrollbar</code> using
+ * the specified peer interface.
+ * @param target the scroll bar to be implemented.
+ * @return this toolkit's implementation of <code>Scrollbar</code>.
+ * @exception HeadlessException if GraphicsEnvironment.isHeadless()
+ * returns true
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ * @see java.awt.Scrollbar
+ * @see java.awt.peer.ScrollbarPeer
+ */
+ protected abstract ScrollbarPeer createScrollbar(Scrollbar target)
+ throws HeadlessException;
+
+ /**
+ * Creates this toolkit's implementation of <code>ScrollPane</code> using
+ * the specified peer interface.
+ * @param target the scroll pane to be implemented.
+ * @return this toolkit's implementation of <code>ScrollPane</code>.
+ * @exception HeadlessException if GraphicsEnvironment.isHeadless()
+ * returns true
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ * @see java.awt.ScrollPane
+ * @see java.awt.peer.ScrollPanePeer
+ * @since JDK1.1
+ */
+ protected abstract ScrollPanePeer createScrollPane(ScrollPane target)
+ throws HeadlessException;
+
+ /**
+ * Creates this toolkit's implementation of <code>TextArea</code> using
+ * the specified peer interface.
+ * @param target the text area to be implemented.
+ * @return this toolkit's implementation of <code>TextArea</code>.
+ * @exception HeadlessException if GraphicsEnvironment.isHeadless()
+ * returns true
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ * @see java.awt.TextArea
+ * @see java.awt.peer.TextAreaPeer
+ */
+ protected abstract TextAreaPeer createTextArea(TextArea target)
+ throws HeadlessException;
+
+ /**
+ * Creates this toolkit's implementation of <code>Choice</code> using
+ * the specified peer interface.
+ * @param target the choice to be implemented.
+ * @return this toolkit's implementation of <code>Choice</code>.
+ * @exception HeadlessException if GraphicsEnvironment.isHeadless()
+ * returns true
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ * @see java.awt.Choice
+ * @see java.awt.peer.ChoicePeer
+ */
+ protected abstract ChoicePeer createChoice(Choice target)
+ throws HeadlessException;
+
+ /**
+ * Creates this toolkit's implementation of <code>Frame</code> using
+ * the specified peer interface.
+ * @param target the frame to be implemented.
+ * @return this toolkit's implementation of <code>Frame</code>.
+ * @exception HeadlessException if GraphicsEnvironment.isHeadless()
+ * returns true
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ * @see java.awt.Frame
+ * @see java.awt.peer.FramePeer
+ */
+ protected abstract FramePeer createFrame(Frame target)
+ throws HeadlessException;
+
+ /**
+ * Creates this toolkit's implementation of <code>Canvas</code> using
+ * the specified peer interface.
+ * @param target the canvas to be implemented.
+ * @return this toolkit's implementation of <code>Canvas</code>.
+ * @see java.awt.Canvas
+ * @see java.awt.peer.CanvasPeer
+ */
+ protected abstract CanvasPeer createCanvas(Canvas target);
+
+ /**
+ * Creates this toolkit's implementation of <code>Panel</code> using
+ * the specified peer interface.
+ * @param target the panel to be implemented.
+ * @return this toolkit's implementation of <code>Panel</code>.
+ * @see java.awt.Panel
+ * @see java.awt.peer.PanelPeer
+ */
+ protected abstract PanelPeer createPanel(Panel target);
+
+ /**
+ * Creates this toolkit's implementation of <code>Window</code> using
+ * the specified peer interface.
+ * @param target the window to be implemented.
+ * @return this toolkit's implementation of <code>Window</code>.
+ * @exception HeadlessException if GraphicsEnvironment.isHeadless()
+ * returns true
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ * @see java.awt.Window
+ * @see java.awt.peer.WindowPeer
+ */
+ protected abstract WindowPeer createWindow(Window target)
+ throws HeadlessException;
+
+ /**
+ * Creates this toolkit's implementation of <code>Dialog</code> using
+ * the specified peer interface.
+ * @param target the dialog to be implemented.
+ * @return this toolkit's implementation of <code>Dialog</code>.
+ * @exception HeadlessException if GraphicsEnvironment.isHeadless()
+ * returns true
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ * @see java.awt.Dialog
+ * @see java.awt.peer.DialogPeer
+ */
+ protected abstract DialogPeer createDialog(Dialog target)
+ throws HeadlessException;
+
+ /**
+ * Creates this toolkit's implementation of <code>MenuBar</code> using
+ * the specified peer interface.
+ * @param target the menu bar to be implemented.
+ * @return this toolkit's implementation of <code>MenuBar</code>.
+ * @exception HeadlessException if GraphicsEnvironment.isHeadless()
+ * returns true
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ * @see java.awt.MenuBar
+ * @see java.awt.peer.MenuBarPeer
+ */
+ protected abstract MenuBarPeer createMenuBar(MenuBar target)
+ throws HeadlessException;
+
+ /**
+ * Creates this toolkit's implementation of <code>Menu</code> using
+ * the specified peer interface.
+ * @param target the menu to be implemented.
+ * @return this toolkit's implementation of <code>Menu</code>.
+ * @exception HeadlessException if GraphicsEnvironment.isHeadless()
+ * returns true
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ * @see java.awt.Menu
+ * @see java.awt.peer.MenuPeer
+ */
+ protected abstract MenuPeer createMenu(Menu target)
+ throws HeadlessException;
+
+ /**
+ * Creates this toolkit's implementation of <code>PopupMenu</code> using
+ * the specified peer interface.
+ * @param target the popup menu to be implemented.
+ * @return this toolkit's implementation of <code>PopupMenu</code>.
+ * @exception HeadlessException if GraphicsEnvironment.isHeadless()
+ * returns true
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ * @see java.awt.PopupMenu
+ * @see java.awt.peer.PopupMenuPeer
+ * @since JDK1.1
+ */
+ protected abstract PopupMenuPeer createPopupMenu(PopupMenu target)
+ throws HeadlessException;
+
+ /**
+ * Creates this toolkit's implementation of <code>MenuItem</code> using
+ * the specified peer interface.
+ * @param target the menu item to be implemented.
+ * @return this toolkit's implementation of <code>MenuItem</code>.
+ * @exception HeadlessException if GraphicsEnvironment.isHeadless()
+ * returns true
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ * @see java.awt.MenuItem
+ * @see java.awt.peer.MenuItemPeer
+ */
+ protected abstract MenuItemPeer createMenuItem(MenuItem target)
+ throws HeadlessException;
+
+ /**
+ * Creates this toolkit's implementation of <code>FileDialog</code> using
+ * the specified peer interface.
+ * @param target the file dialog to be implemented.
+ * @return this toolkit's implementation of <code>FileDialog</code>.
+ * @exception HeadlessException if GraphicsEnvironment.isHeadless()
+ * returns true
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ * @see java.awt.FileDialog
+ * @see java.awt.peer.FileDialogPeer
+ */
+ protected abstract FileDialogPeer createFileDialog(FileDialog target)
+ throws HeadlessException;
+
+ /**
+ * Creates this toolkit's implementation of <code>CheckboxMenuItem</code> using
+ * the specified peer interface.
+ * @param target the checkbox menu item to be implemented.
+ * @return this toolkit's implementation of <code>CheckboxMenuItem</code>.
+ * @exception HeadlessException if GraphicsEnvironment.isHeadless()
+ * returns true
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ * @see java.awt.CheckboxMenuItem
+ * @see java.awt.peer.CheckboxMenuItemPeer
+ */
+ protected abstract CheckboxMenuItemPeer createCheckboxMenuItem(
+ CheckboxMenuItem target) throws HeadlessException;
+
+ /**
+ * Obtains this toolkit's implementation of helper class for
+ * <code>MouseInfo</code> operations.
+ * @return this toolkit's implementation of helper for <code>MouseInfo</code>
+ * @throws UnsupportedOperationException if this operation is not implemented
+ * @see java.awt.peer.MouseInfoPeer
+ * @see java.awt.MouseInfo
+ * @since 1.5
+ */
+ protected MouseInfoPeer getMouseInfoPeer() {
+ throw new UnsupportedOperationException("Not implemented");
+ }
+
+ private static LightweightPeer lightweightMarker;
+
+ /**
+ * Creates a peer for a component or container. This peer is windowless
+ * and allows the Component and Container classes to be extended directly
+ * to create windowless components that are defined entirely in java.
+ *
+ * @param target The Component to be created.
+ */
+ protected LightweightPeer createComponent(Component target) {
+ if (lightweightMarker == null) {
+ lightweightMarker = new NullComponentPeer();
+ }
+ return lightweightMarker;
+ }
+
+ /**
+ * Creates this toolkit's implementation of <code>Font</code> using
+ * the specified peer interface.
+ * @param name the font to be implemented
+ * @param style the style of the font, such as <code>PLAIN</code>,
+ * <code>BOLD</code>, <code>ITALIC</code>, or a combination
+ * @return this toolkit's implementation of <code>Font</code>
+ * @see java.awt.Font
+ * @see java.awt.peer.FontPeer
+ * @see java.awt.GraphicsEnvironment#getAllFonts
+ * @deprecated see java.awt.GraphicsEnvironment#getAllFonts
+ */
+ @Deprecated
+ protected abstract FontPeer getFontPeer(String name, int style);
+
+ // The following method is called by the private method
+ // <code>updateSystemColors</code> in <code>SystemColor</code>.
+
+ /**
+ * Fills in the integer array that is supplied as an argument
+ * with the current system color values.
+ *
+ * @param systemColors an integer array.
+ * @exception HeadlessException if GraphicsEnvironment.isHeadless()
+ * returns true
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ * @since JDK1.1
+ */
+ protected void loadSystemColors(int[] systemColors)
+ throws HeadlessException {
+ }
+
+/**
+ * Controls whether the layout of Containers is validated dynamically
+ * during resizing, or statically, after resizing is complete.
+ * Use {@code isDynamicLayoutActive()} to detect if this feature enabled
+ * in this program and is supported by this operating system
+ * and/or window manager.
+ * Note that this feature is supported not on all platforms, and
+ * conversely, that this feature cannot be turned off on some platforms.
+ * On these platforms where dynamic layout during resizing is not supported
+ * (or is always supported), setting this property has no effect.
+ * Note that this feature can be set or unset as a property of the
+ * operating system or window manager on some platforms. On such
+ * platforms, the dynamic resize property must be set at the operating
+ * system or window manager level before this method can take effect.
+ * This method does not change support or settings of the underlying
+ * operating system or
+ * window manager. The OS/WM support can be
+ * queried using getDesktopProperty("awt.dynamicLayoutSupported") method.
+ *
+ * @param dynamic If true, Containers should re-layout their
+ * components as the Container is being resized. If false,
+ * the layout will be validated after resizing is completed.
+ * @exception HeadlessException if GraphicsEnvironment.isHeadless()
+ * returns true
+ * @see #isDynamicLayoutSet()
+ * @see #isDynamicLayoutActive()
+ * @see #getDesktopProperty(String propertyName)
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ * @since 1.4
+ */
+ public void setDynamicLayout(boolean dynamic)
+ throws HeadlessException {
+ }
+
+ /**
+ * Returns whether the layout of Containers is validated dynamically
+ * during resizing, or statically, after resizing is complete.
+ * Note: this method returns the value that was set programmatically;
+ * it does not reflect support at the level of the operating system
+ * or window manager for dynamic layout on resizing, or the current
+ * operating system or window manager settings. The OS/WM support can
+ * be queried using getDesktopProperty("awt.dynamicLayoutSupported").
+ *
+ * @return true if validation of Containers is done dynamically,
+ * false if validation is done after resizing is finished.
+ * @exception HeadlessException if GraphicsEnvironment.isHeadless()
+ * returns true
+ * @see #setDynamicLayout(boolean dynamic)
+ * @see #isDynamicLayoutActive()
+ * @see #getDesktopProperty(String propertyName)
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ * @since 1.4
+ */
+ protected boolean isDynamicLayoutSet()
+ throws HeadlessException {
+ if (this != Toolkit.getDefaultToolkit()) {
+ return Toolkit.getDefaultToolkit().isDynamicLayoutSet();
+ } else {
+ return false;
+ }
+ }
+
+ /**
+ * Returns whether dynamic layout of Containers on resize is
+ * currently active (both set in program
+ *( {@code isDynamicLayoutSet()} )
+ *, and supported
+ * by the underlying operating system and/or window manager).
+ * If dynamic layout is currently inactive then Containers
+ * re-layout their components when resizing is completed. As a result
+ * the {@code Component.validate()} method will be invoked only
+ * once per resize.
+ * If dynamic layout is currently active then Containers
+ * re-layout their components on every native resize event and
+ * the {@code validate()} method will be invoked each time.
+ * The OS/WM support can be queried using
+ * the getDesktopProperty("awt.dynamicLayoutSupported") method.
+ *
+ * @return true if dynamic layout of Containers on resize is
+ * currently active, false otherwise.
+ * @exception HeadlessException if the GraphicsEnvironment.isHeadless()
+ * method returns true
+ * @see #setDynamicLayout(boolean dynamic)
+ * @see #isDynamicLayoutSet()
+ * @see #getDesktopProperty(String propertyName)
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ * @since 1.4
+ */
+ public boolean isDynamicLayoutActive()
+ throws HeadlessException {
+ if (this != Toolkit.getDefaultToolkit()) {
+ return Toolkit.getDefaultToolkit().isDynamicLayoutActive();
+ } else {
+ return false;
+ }
+ }
+
+ /**
+ * Gets the size of the screen. On systems with multiple displays, the
+ * primary display is used. Multi-screen aware display dimensions are
+ * available from <code>GraphicsConfiguration</code> and
+ * <code>GraphicsDevice</code>.
+ * @return the size of this toolkit's screen, in pixels.
+ * @exception HeadlessException if GraphicsEnvironment.isHeadless()
+ * returns true
+ * @see java.awt.GraphicsConfiguration#getBounds
+ * @see java.awt.GraphicsDevice#getDisplayMode
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ */
+ public abstract Dimension getScreenSize()
+ throws HeadlessException;
+
+ /**
+ * Returns the screen resolution in dots-per-inch.
+ * @return this toolkit's screen resolution, in dots-per-inch.
+ * @exception HeadlessException if GraphicsEnvironment.isHeadless()
+ * returns true
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ */
+ public abstract int getScreenResolution()
+ throws HeadlessException;
+
+ /**
+ * Gets the insets of the screen.
+ * @param gc a <code>GraphicsConfiguration</code>
+ * @return the insets of this toolkit's screen, in pixels.
+ * @exception HeadlessException if GraphicsEnvironment.isHeadless()
+ * returns true
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ * @since 1.4
+ */
+ public Insets getScreenInsets(GraphicsConfiguration gc)
+ throws HeadlessException {
+ if (this != Toolkit.getDefaultToolkit()) {
+ return Toolkit.getDefaultToolkit().getScreenInsets(gc);
+ } else {
+ return new Insets(0, 0, 0, 0);
+ }
+ }
+
+ /**
+ * Determines the color model of this toolkit's screen.
+ * <p>
+ * <code>ColorModel</code> is an abstract class that
+ * encapsulates the ability to translate between the
+ * pixel values of an image and its red, green, blue,
+ * and alpha components.
+ * <p>
+ * This toolkit method is called by the
+ * <code>getColorModel</code> method
+ * of the <code>Component</code> class.
+ * @return the color model of this toolkit's screen.
+ * @exception HeadlessException if GraphicsEnvironment.isHeadless()
+ * returns true
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ * @see java.awt.image.ColorModel
+ * @see java.awt.Component#getColorModel
+ */
+ public abstract ColorModel getColorModel()
+ throws HeadlessException;
+
+ /**
+ * Returns the names of the available fonts in this toolkit.<p>
+ * For 1.1, the following font names are deprecated (the replacement
+ * name follows):
+ * <ul>
+ * <li>TimesRoman (use Serif)
+ * <li>Helvetica (use SansSerif)
+ * <li>Courier (use Monospaced)
+ * </ul><p>
+ * The ZapfDingbats fontname is also deprecated in 1.1 but the characters
+ * are defined in Unicode starting at 0x2700, and as of 1.1 Java supports
+ * those characters.
+ * @return the names of the available fonts in this toolkit.
+ * @deprecated see {@link java.awt.GraphicsEnvironment#getAvailableFontFamilyNames()}
+ * @see java.awt.GraphicsEnvironment#getAvailableFontFamilyNames()
+ */
+ @Deprecated
+ public abstract String[] getFontList();
+
+ /**
+ * Gets the screen device metrics for rendering of the font.
+ * @param font a font
+ * @return the screen metrics of the specified font in this toolkit
+ * @deprecated As of JDK version 1.2, replaced by the <code>Font</code>
+ * method <code>getLineMetrics</code>.
+ * @see java.awt.font.LineMetrics
+ * @see java.awt.Font#getLineMetrics
+ * @see java.awt.GraphicsEnvironment#getScreenDevices
+ */
+ @Deprecated
+ public abstract FontMetrics getFontMetrics(Font font);
+
+ /**
+ * Synchronizes this toolkit's graphics state. Some window systems
+ * may do buffering of graphics events.
+ * <p>
+ * This method ensures that the display is up-to-date. It is useful
+ * for animation.
+ */
+ public abstract void sync();
+
+ /**
+ * The default toolkit.
+ */
+ private static Toolkit toolkit;
+
+ /**
+ * Used internally by the assistive technologies functions; set at
+ * init time and used at load time
+ */
+ private static String atNames;
+
+ /**
+ * Initializes properties related to assistive technologies.
+ * These properties are used both in the loadAssistiveProperties()
+ * function below, as well as other classes in the jdk that depend
+ * on the properties (such as the use of the screen_magnifier_present
+ * property in Java2D hardware acceleration initialization). The
+ * initialization of the properties must be done before the platform-
+ * specific Toolkit class is instantiated so that all necessary
+ * properties are set up properly before any classes dependent upon them
+ * are initialized.
+ */
+ private static void initAssistiveTechnologies() {
+
+ // Get accessibility properties
+ final String sep = File.separator;
+ final Properties properties = new Properties();
+
+
+ atNames = (String)java.security.AccessController.doPrivileged(
+ new java.security.PrivilegedAction() {
+ public Object run() {
+
+ // Try loading the per-user accessibility properties file.
+ try {
+ File propsFile = new File(
+ System.getProperty("user.home") +
+ sep + ".accessibility.properties");
+ FileInputStream in =
+ new FileInputStream(propsFile);
+
+ // Inputstream has been buffered in Properties class
+ properties.load(in);
+ in.close();
+ } catch (Exception e) {
+ // Per-user accessibility properties file does not exist
+ }
+
+ // Try loading the system-wide accessibility properties
+ // file only if a per-user accessibility properties
+ // file does not exist or is empty.
+ if (properties.size() == 0) {
+ try {
+ File propsFile = new File(
+ System.getProperty("java.home") + sep + "lib" +
+ sep + "accessibility.properties");
+ FileInputStream in =
+ new FileInputStream(propsFile);
+
+ // Inputstream has been buffered in Properties class
+ properties.load(in);
+ in.close();
+ } catch (Exception e) {
+ // System-wide accessibility properties file does
+ // not exist;
+ }
+ }
+
+ // Get whether a screen magnifier is present. First check
+ // the system property and then check the properties file.
+ String magPresent = System.getProperty("javax.accessibility.screen_magnifier_present");
+ if (magPresent == null) {
+ magPresent = properties.getProperty("screen_magnifier_present", null);
+ if (magPresent != null) {
+ System.setProperty("javax.accessibility.screen_magnifier_present", magPresent);
+ }
+ }
+
+ // Get the names of any assistive technolgies to load. First
+ // check the system property and then check the properties
+ // file.
+ String classNames = System.getProperty("javax.accessibility.assistive_technologies");
+ if (classNames == null) {
+ classNames = properties.getProperty("assistive_technologies", null);
+ if (classNames != null) {
+ System.setProperty("javax.accessibility.assistive_technologies", classNames);
+ }
+ }
+ return classNames;
+ }
+ });
+ }
+
+ /**
+ * Loads additional classes into the VM, using the property
+ * 'assistive_technologies' specified in the Sun reference
+ * implementation by a line in the 'accessibility.properties'
+ * file. The form is "assistive_technologies=..." where
+ * the "..." is a comma-separated list of assistive technology
+ * classes to load. Each class is loaded in the order given
+ * and a single instance of each is created using
+ * Class.forName(class).newInstance(). All errors are handled
+ * via an AWTError exception.
+ *
+ * <p>The assumption is made that assistive technology classes are supplied
+ * as part of INSTALLED (as opposed to: BUNDLED) extensions or specified
+ * on the class path
+ * (and therefore can be loaded using the class loader returned by
+ * a call to <code>ClassLoader.getSystemClassLoader</code>, whose
+ * delegation parent is the extension class loader for installed
+ * extensions).
+ */
+ private static void loadAssistiveTechnologies() {
+ // Load any assistive technologies
+ if (atNames != null) {
+ ClassLoader cl = ClassLoader.getSystemClassLoader();
+ StringTokenizer parser = new StringTokenizer(atNames," ,");
+ String atName;
+ while (parser.hasMoreTokens()) {
+ atName = parser.nextToken();
+ try {
+ Class clazz;
+ if (cl != null) {
+ clazz = cl.loadClass(atName);
+ } else {
+ clazz = Class.forName(atName);
+ }
+ clazz.newInstance();
+ } catch (ClassNotFoundException e) {
+ throw new AWTError("Assistive Technology not found: "
+ + atName);
+ } catch (InstantiationException e) {
+ throw new AWTError("Could not instantiate Assistive"
+ + " Technology: " + atName);
+ } catch (IllegalAccessException e) {
+ throw new AWTError("Could not access Assistive"
+ + " Technology: " + atName);
+ } catch (Exception e) {
+ throw new AWTError("Error trying to install Assistive"
+ + " Technology: " + atName + " " + e);
+ }
+ }
+ }
+ }
+
+ /**
+ * Gets the default toolkit.
+ * <p>
+ * If a system property named <code>"java.awt.headless"</code> is set
+ * to <code>true</code> then the headless implementation
+ * of <code>Toolkit</code> is used.
+ * <p>
+ * If there is no <code>"java.awt.headless"</code> or it is set to
+ * <code>false</code> and there is a system property named
+ * <code>"awt.toolkit"</code>,
+ * that property is treated as the name of a class that is a subclass
+ * of <code>Toolkit</code>;
+ * otherwise the default platform-specific implementation of
+ * <code>Toolkit</code> is used.
+ * <p>
+ * Also loads additional classes into the VM, using the property
+ * 'assistive_technologies' specified in the Sun reference
+ * implementation by a line in the 'accessibility.properties'
+ * file. The form is "assistive_technologies=..." where
+ * the "..." is a comma-separated list of assistive technology
+ * classes to load. Each class is loaded in the order given
+ * and a single instance of each is created using
+ * Class.forName(class).newInstance(). This is done just after
+ * the AWT toolkit is created. All errors are handled via an
+ * AWTError exception.
+ * @return the default toolkit.
+ * @exception AWTError if a toolkit could not be found, or
+ * if one could not be accessed or instantiated.
+ */
+ public static synchronized Toolkit getDefaultToolkit() {
+ if (toolkit == null) {
+ try {
+ // We disable the JIT during toolkit initialization. This
+ // tends to touch lots of classes that aren't needed again
+ // later and therefore JITing is counter-productiive.
+ java.lang.Compiler.disable();
+
+ java.security.AccessController.doPrivileged(
+ new java.security.PrivilegedAction() {
+ public Object run() {
+ String nm = null;
+ Class cls = null;
+ try {
+ nm = System.getProperty("awt.toolkit", "sun.awt.X11.XToolkit");
+ try {
+ cls = Class.forName(nm);
+ } catch (ClassNotFoundException e) {
+ ClassLoader cl = ClassLoader.getSystemClassLoader();
+ if (cl != null) {
+ try {
+ cls = cl.loadClass(nm);
+ } catch (ClassNotFoundException ee) {
+ throw new AWTError("Toolkit not found: " + nm);
+ }
+ }
+ }
+ if (cls != null) {
+ toolkit = (Toolkit)cls.newInstance();
+ if (GraphicsEnvironment.isHeadless()) {
+ toolkit = new HeadlessToolkit(toolkit);
+ }
+ }
+ } catch (InstantiationException e) {
+ throw new AWTError("Could not instantiate Toolkit: " + nm);
+ } catch (IllegalAccessException e) {
+ throw new AWTError("Could not access Toolkit: " + nm);
+ }
+ return null;
+ }
+ });
+ loadAssistiveTechnologies();
+ } finally {
+ // Make sure to always re-enable the JIT.
+ java.lang.Compiler.enable();
+ }
+ }
+ return toolkit;
+ }
+
+ /**
+ * Returns an image which gets pixel data from the specified file,
+ * whose format can be either GIF, JPEG or PNG.
+ * The underlying toolkit attempts to resolve multiple requests
+ * with the same filename to the same returned Image.
+ * <p>
+ * Since the mechanism required to facilitate this sharing of
+ * <code>Image</code> objects may continue to hold onto images
+ * that are no longer in use for an indefinite period of time,
+ * developers are encouraged to implement their own caching of
+ * images by using the {@link #createImage(java.lang.String) createImage}
+ * variant wherever available.
+ * If the image data contained in the specified file changes,
+ * the <code>Image</code> object returned from this method may
+ * still contain stale information which was loaded from the
+ * file after a prior call.
+ * Previously loaded image data can be manually discarded by
+ * calling the {@link Image#flush flush} method on the
+ * returned <code>Image</code>.
+ * <p>
+ * This method first checks if there is a security manager installed.
+ * If so, the method calls the security manager's
+ * <code>checkRead</code> method with the file specified to ensure
+ * that the access to the image is allowed.
+ * @param filename the name of a file containing pixel data
+ * in a recognized file format.
+ * @return an image which gets its pixel data from
+ * the specified file.
+ * @throws SecurityException if a security manager exists and its
+ * checkRead method doesn't allow the operation.
+ * @see #createImage(java.lang.String)
+ */
+ public abstract Image getImage(String filename);
+
+ /**
+ * Returns an image which gets pixel data from the specified URL.
+ * The pixel data referenced by the specified URL must be in one
+ * of the following formats: GIF, JPEG or PNG.
+ * The underlying toolkit attempts to resolve multiple requests
+ * with the same URL to the same returned Image.
+ * <p>
+ * Since the mechanism required to facilitate this sharing of
+ * <code>Image</code> objects may continue to hold onto images
+ * that are no longer in use for an indefinite period of time,
+ * developers are encouraged to implement their own caching of
+ * images by using the {@link #createImage(java.net.URL) createImage}
+ * variant wherever available.
+ * If the image data stored at the specified URL changes,
+ * the <code>Image</code> object returned from this method may
+ * still contain stale information which was fetched from the
+ * URL after a prior call.
+ * Previously loaded image data can be manually discarded by
+ * calling the {@link Image#flush flush} method on the
+ * returned <code>Image</code>.
+ * <p>
+ * This method first checks if there is a security manager installed.
+ * If so, the method calls the security manager's
+ * <code>checkPermission</code> method with the
+ * url.openConnection().getPermission() permission to ensure
+ * that the access to the image is allowed. For compatibility
+ * with pre-1.2 security managers, if the access is denied with
+ * <code>FilePermission</code> or <code>SocketPermission</code>,
+ * the method throws the <code>SecurityException</code>
+ * if the corresponding 1.1-style SecurityManager.checkXXX method
+ * also denies permission.
+ * @param url the URL to use in fetching the pixel data.
+ * @return an image which gets its pixel data from
+ * the specified URL.
+ * @throws SecurityException if a security manager exists and its
+ * checkPermission method doesn't allow
+ * the operation.
+ * @see #createImage(java.net.URL)
+ */
+ public abstract Image getImage(URL url);
+
+ /**
+ * Returns an image which gets pixel data from the specified file.
+ * The returned Image is a new object which will not be shared
+ * with any other caller of this method or its getImage variant.
+ * <p>
+ * This method first checks if there is a security manager installed.
+ * If so, the method calls the security manager's
+ * <code>checkRead</code> method with the specified file to ensure
+ * that the image creation is allowed.
+ * @param filename the name of a file containing pixel data
+ * in a recognized file format.
+ * @return an image which gets its pixel data from
+ * the specified file.
+ * @throws SecurityException if a security manager exists and its
+ * checkRead method doesn't allow the operation.
+ * @see #getImage(java.lang.String)
+ */
+ public abstract Image createImage(String filename);
+
+ /**
+ * Returns an image which gets pixel data from the specified URL.
+ * The returned Image is a new object which will not be shared
+ * with any other caller of this method or its getImage variant.
+ * <p>
+ * This method first checks if there is a security manager installed.
+ * If so, the method calls the security manager's
+ * <code>checkPermission</code> method with the
+ * url.openConnection().getPermission() permission to ensure
+ * that the image creation is allowed. For compatibility
+ * with pre-1.2 security managers, if the access is denied with
+ * <code>FilePermission</code> or <code>SocketPermission</code>,
+ * the method throws <code>SecurityException</code>
+ * if the corresponding 1.1-style SecurityManager.checkXXX method
+ * also denies permission.
+ * @param url the URL to use in fetching the pixel data.
+ * @return an image which gets its pixel data from
+ * the specified URL.
+ * @throws SecurityException if a security manager exists and its
+ * checkPermission method doesn't allow
+ * the operation.
+ * @see #getImage(java.net.URL)
+ */
+ public abstract Image createImage(URL url);
+
+ /**
+ * Prepares an image for rendering.
+ * <p>
+ * If the values of the width and height arguments are both
+ * <code>-1</code>, this method prepares the image for rendering
+ * on the default screen; otherwise, this method prepares an image
+ * for rendering on the default screen at the specified width and height.
+ * <p>
+ * The image data is downloaded asynchronously in another thread,
+ * and an appropriately scaled screen representation of the image is
+ * generated.
+ * <p>
+ * This method is called by components <code>prepareImage</code>
+ * methods.
+ * <p>
+ * Information on the flags returned by this method can be found
+ * with the definition of the <code>ImageObserver</code> interface.
+
+ * @param image the image for which to prepare a
+ * screen representation.
+ * @param width the width of the desired screen
+ * representation, or <code>-1</code>.
+ * @param height the height of the desired screen
+ * representation, or <code>-1</code>.
+ * @param observer the <code>ImageObserver</code>
+ * object to be notified as the
+ * image is being prepared.
+ * @return <code>true</code> if the image has already been
+ * fully prepared; <code>false</code> otherwise.
+ * @see java.awt.Component#prepareImage(java.awt.Image,
+ * java.awt.image.ImageObserver)
+ * @see java.awt.Component#prepareImage(java.awt.Image,
+ * int, int, java.awt.image.ImageObserver)
+ * @see java.awt.image.ImageObserver
+ */
+ public abstract boolean prepareImage(Image image, int width, int height,
+ ImageObserver observer);
+
+ /**
+ * Indicates the construction status of a specified image that is
+ * being prepared for display.
+ * <p>
+ * If the values of the width and height arguments are both
+ * <code>-1</code>, this method returns the construction status of
+ * a screen representation of the specified image in this toolkit.
+ * Otherwise, this method returns the construction status of a
+ * scaled representation of the image at the specified width
+ * and height.
+ * <p>
+ * This method does not cause the image to begin loading.
+ * An application must call <code>prepareImage</code> to force
+ * the loading of an image.
+ * <p>
+ * This method is called by the component's <code>checkImage</code>
+ * methods.
+ * <p>
+ * Information on the flags returned by this method can be found
+ * with the definition of the <code>ImageObserver</code> interface.
+ * @param image the image whose status is being checked.
+ * @param width the width of the scaled version whose status is
+ * being checked, or <code>-1</code>.
+ * @param height the height of the scaled version whose status
+ * is being checked, or <code>-1</code>.
+ * @param observer the <code>ImageObserver</code> object to be
+ * notified as the image is being prepared.
+ * @return the bitwise inclusive <strong>OR</strong> of the
+ * <code>ImageObserver</code> flags for the
+ * image data that is currently available.
+ * @see java.awt.Toolkit#prepareImage(java.awt.Image,
+ * int, int, java.awt.image.ImageObserver)
+ * @see java.awt.Component#checkImage(java.awt.Image,
+ * java.awt.image.ImageObserver)
+ * @see java.awt.Component#checkImage(java.awt.Image,
+ * int, int, java.awt.image.ImageObserver)
+ * @see java.awt.image.ImageObserver
+ */
+ public abstract int checkImage(Image image, int width, int height,
+ ImageObserver observer);
+
+ /**
+ * Creates an image with the specified image producer.
+ * @param producer the image producer to be used.
+ * @return an image with the specified image producer.
+ * @see java.awt.Image
+ * @see java.awt.image.ImageProducer
+ * @see java.awt.Component#createImage(java.awt.image.ImageProducer)
+ */
+ public abstract Image createImage(ImageProducer producer);
+
+ /**
+ * Creates an image which decodes the image stored in the specified
+ * byte array.
+ * <p>
+ * The data must be in some image format, such as GIF or JPEG,
+ * that is supported by this toolkit.
+ * @param imagedata an array of bytes, representing
+ * image data in a supported image format.
+ * @return an image.
+ * @since JDK1.1
+ */
+ public Image createImage(byte[] imagedata) {
+ return createImage(imagedata, 0, imagedata.length);
+ }
+
+ /**
+ * Creates an image which decodes the image stored in the specified
+ * byte array, and at the specified offset and length.
+ * The data must be in some image format, such as GIF or JPEG,
+ * that is supported by this toolkit.
+ * @param imagedata an array of bytes, representing
+ * image data in a supported image format.
+ * @param imageoffset the offset of the beginning
+ * of the data in the array.
+ * @param imagelength the length of the data in the array.
+ * @return an image.
+ * @since JDK1.1
+ */
+ public abstract Image createImage(byte[] imagedata,
+ int imageoffset,
+ int imagelength);
+
+ /**
+ * Gets a <code>PrintJob</code> object which is the result of initiating
+ * a print operation on the toolkit's platform.
+ * <p>
+ * Each actual implementation of this method should first check if there
+ * is a security manager installed. If there is, the method should call
+ * the security manager's <code>checkPrintJobAccess</code> method to
+ * ensure initiation of a print operation is allowed. If the default
+ * implementation of <code>checkPrintJobAccess</code> is used (that is,
+ * that method is not overriden), then this results in a call to the
+ * security manager's <code>checkPermission</code> method with a <code>
+ * RuntimePermission("queuePrintJob")</code> permission.
+ *
+ * @param frame the parent of the print dialog. May not be null.
+ * @param jobtitle the title of the PrintJob. A null title is equivalent
+ * to "".
+ * @param props a Properties object containing zero or more properties.
+ * Properties are not standardized and are not consistent across
+ * implementations. Because of this, PrintJobs which require job
+ * and page control should use the version of this function which
+ * takes JobAttributes and PageAttributes objects. This object
+ * may be updated to reflect the user's job choices on exit. May
+ * be null.
+ *
+ * @return a <code>PrintJob</code> object, or <code>null</code> if the
+ * user cancelled the print job.
+ * @throws NullPointerException if frame is null. This exception is
+ * always thrown when GraphicsEnvironment.isHeadless() returns
+ * true.
+ * @throws SecurityException if this thread is not allowed to initiate a
+ * print job request
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ * @see java.awt.PrintJob
+ * @see java.lang.RuntimePermission
+ * @since JDK1.1
+ */
+ public abstract PrintJob getPrintJob(Frame frame, String jobtitle,
+ Properties props);
+
+ /**
+ * Gets a <code>PrintJob</code> object which is the result of initiating
+ * a print operation on the toolkit's platform.
+ * <p>
+ * Each actual implementation of this method should first check if there
+ * is a security manager installed. If there is, the method should call
+ * the security manager's <code>checkPrintJobAccess</code> method to
+ * ensure initiation of a print operation is allowed. If the default
+ * implementation of <code>checkPrintJobAccess</code> is used (that is,
+ * that method is not overriden), then this results in a call to the
+ * security manager's <code>checkPermission</code> method with a <code>
+ * RuntimePermission("queuePrintJob")</code> permission.
+ *
+ * @param frame the parent of the print dialog. May be null if and only
+ * if jobAttributes is not null and jobAttributes.getDialog()
+ * returns JobAttributes.DialogType.NONE or
+ * JobAttributes.DialogType.COMMON.
+ * @param jobtitle the title of the PrintJob. A null title is equivalent
+ * to "".
+ * @param jobAttributes a set of job attributes which will control the
+ * PrintJob. The attributes will be updated to reflect the user's
+ * choices as outlined in the JobAttributes documentation. May be
+ * null.
+ * @param pageAttributes a set of page attributes which will control the
+ * PrintJob. The attributes will be applied to every page in the
+ * job. The attributes will be updated to reflect the user's
+ * choices as outlined in the PageAttributes documentation. May be
+ * null.
+ *
+ * @return a <code>PrintJob</code> object, or <code>null</code> if the
+ * user cancelled the print job.
+ * @throws NullPointerException if frame is null and either jobAttributes
+ * is null or jobAttributes.getDialog() returns
+ * JobAttributes.DialogType.NATIVE.
+ * @throws IllegalArgumentException if pageAttributes specifies differing
+ * cross feed and feed resolutions. Also if this thread has
+ * access to the file system and jobAttributes specifies
+ * print to file, and the specified destination file exists but
+ * is a directory rather than a regular file, does not exist but
+ * cannot be created, or cannot be opened for any other reason.
+ * However in the case of print to file, if a dialog is also
+ * requested to be displayed then the user will be given an
+ * opportunity to select a file and proceed with printing.
+ * The dialog will ensure that the selected output file
+ * is valid before returning from this method.
+ * <p>
+ * This exception is always thrown when GraphicsEnvironment.isHeadless()
+ * returns true.
+ * @throws SecurityException if this thread is not allowed to initiate a
+ * print job request, or if jobAttributes specifies print to file,
+ * and this thread is not allowed to access the file system
+ * @see java.awt.PrintJob
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ * @see java.lang.RuntimePermission
+ * @see java.awt.JobAttributes
+ * @see java.awt.PageAttributes
+ * @since 1.3
+ */
+ public PrintJob getPrintJob(Frame frame, String jobtitle,
+ JobAttributes jobAttributes,
+ PageAttributes pageAttributes) {
+ // Override to add printing support with new job/page control classes
+
+ if (GraphicsEnvironment.isHeadless()) {
+ throw new IllegalArgumentException();
+ }
+
+ if (this != Toolkit.getDefaultToolkit()) {
+ return Toolkit.getDefaultToolkit().getPrintJob(frame, jobtitle,
+ jobAttributes,
+ pageAttributes);
+ } else {
+ return getPrintJob(frame, jobtitle, null);
+ }
+ }
+
+ /**
+ * Emits an audio beep.
+ * @since JDK1.1
+ */
+ public abstract void beep();
+
+ /**
+ * Gets the singleton instance of the system Clipboard which interfaces
+ * with clipboard facilities provided by the native platform. This
+ * clipboard enables data transfer between Java programs and native
+ * applications which use native clipboard facilities.
+ * <p>
+ * In addition to any and all formats specified in the flavormap.properties
+ * file, or other file specified by the <code>AWT.DnD.flavorMapFileURL
+ * </code> Toolkit property, text returned by the system Clipboard's <code>
+ * getTransferData()</code> method is available in the following flavors:
+ * <ul>
+ * <li>DataFlavor.stringFlavor</li>
+ * <li>DataFlavor.plainTextFlavor (<b>deprecated</b>)</li>
+ * </ul>
+ * As with <code>java.awt.datatransfer.StringSelection</code>, if the
+ * requested flavor is <code>DataFlavor.plainTextFlavor</code>, or an
+ * equivalent flavor, a Reader is returned. <b>Note:</b> The behavior of
+ * the system Clipboard's <code>getTransferData()</code> method for <code>
+ * DataFlavor.plainTextFlavor</code>, and equivalent DataFlavors, is
+ * inconsistent with the definition of <code>DataFlavor.plainTextFlavor
+ * </code>. Because of this, support for <code>
+ * DataFlavor.plainTextFlavor</code>, and equivalent flavors, is
+ * <b>deprecated</b>.
+ * <p>
+ * Each actual implementation of this method should first check if there
+ * is a security manager installed. If there is, the method should call
+ * the security manager's <code>checkSystemClipboardAccess</code> method
+ * to ensure it's ok to to access the system clipboard. If the default
+ * implementation of <code>checkSystemClipboardAccess</code> is used (that
+ * is, that method is not overriden), then this results in a call to the
+ * security manager's <code>checkPermission</code> method with an <code>
+ * AWTPermission("accessClipboard")</code> permission.
+ *
+ * @return the system Clipboard
+ * @exception HeadlessException if GraphicsEnvironment.isHeadless()
+ * returns true
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ * @see java.awt.datatransfer.Clipboard
+ * @see java.awt.datatransfer.StringSelection
+ * @see java.awt.datatransfer.DataFlavor#stringFlavor
+ * @see java.awt.datatransfer.DataFlavor#plainTextFlavor
+ * @see java.io.Reader
+ * @see java.awt.AWTPermission
+ * @since JDK1.1
+ */
+ public abstract Clipboard getSystemClipboard()
+ throws HeadlessException;
+
+ /**
+ * Gets the singleton instance of the system selection as a
+ * <code>Clipboard</code> object. This allows an application to read and
+ * modify the current, system-wide selection.
+ * <p>
+ * An application is responsible for updating the system selection whenever
+ * the user selects text, using either the mouse or the keyboard.
+ * Typically, this is implemented by installing a
+ * <code>FocusListener</code> on all <code>Component</code>s which support
+ * text selection, and, between <code>FOCUS_GAINED</code> and
+ * <code>FOCUS_LOST</code> events delivered to that <code>Component</code>,
+ * updating the system selection <code>Clipboard</code> when the selection
+ * changes inside the <code>Component</code>. Properly updating the system
+ * selection ensures that a Java application will interact correctly with
+ * native applications and other Java applications running simultaneously
+ * on the system. Note that <code>java.awt.TextComponent</code> and
+ * <code>javax.swing.text.JTextComponent</code> already adhere to this
+ * policy. When using these classes, and their subclasses, developers need
+ * not write any additional code.
+ * <p>
+ * Some platforms do not support a system selection <code>Clipboard</code>.
+ * On those platforms, this method will return <code>null</code>. In such a
+ * case, an application is absolved from its responsibility to update the
+ * system selection <code>Clipboard</code> as described above.
+ * <p>
+ * Each actual implementation of this method should first check if there
+ * is a <code>SecurityManager</code> installed. If there is, the method
+ * should call the <code>SecurityManager</code>'s
+ * <code>checkSystemClipboardAccess</code> method to ensure that client
+ * code has access the system selection. If the default implementation of
+ * <code>checkSystemClipboardAccess</code> is used (that is, if the method
+ * is not overridden), then this results in a call to the
+ * <code>SecurityManager</code>'s <code>checkPermission</code> method with
+ * an <code>AWTPermission("accessClipboard")</code> permission.
+ *
+ * @return the system selection as a <code>Clipboard</code>, or
+ * <code>null</code> if the native platform does not support a
+ * system selection <code>Clipboard</code>
+ * @exception HeadlessException if GraphicsEnvironment.isHeadless()
+ * returns true
+ *
+ * @see java.awt.datatransfer.Clipboard
+ * @see java.awt.event.FocusListener
+ * @see java.awt.event.FocusEvent#FOCUS_GAINED
+ * @see java.awt.event.FocusEvent#FOCUS_LOST
+ * @see TextComponent
+ * @see javax.swing.text.JTextComponent
+ * @see AWTPermission
+ * @see GraphicsEnvironment#isHeadless
+ * @since 1.4
+ */
+ public Clipboard getSystemSelection() throws HeadlessException {
+ if (this != Toolkit.getDefaultToolkit()) {
+ return Toolkit.getDefaultToolkit().getSystemSelection();
+ } else {
+ GraphicsEnvironment.checkHeadless();
+ return null;
+ }
+ }
+
+ /**
+ * Determines which modifier key is the appropriate accelerator
+ * key for menu shortcuts.
+ * <p>
+ * Menu shortcuts, which are embodied in the
+ * <code>MenuShortcut</code> class, are handled by the
+ * <code>MenuBar</code> class.
+ * <p>
+ * By default, this method returns <code>Event.CTRL_MASK</code>.
+ * Toolkit implementations should override this method if the
+ * <b>Control</b> key isn't the correct key for accelerators.
+ * @return the modifier mask on the <code>Event</code> class
+ * that is used for menu shortcuts on this toolkit.
+ * @exception HeadlessException if GraphicsEnvironment.isHeadless()
+ * returns true
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ * @see java.awt.MenuBar
+ * @see java.awt.MenuShortcut
+ * @since JDK1.1
+ */
+ public int getMenuShortcutKeyMask() throws HeadlessException {
+ return Event.CTRL_MASK;
+ }
+
+ /**
+ * Returns whether the given locking key on the keyboard is currently in
+ * its "on" state.
+ * Valid key codes are
+ * {@link java.awt.event.KeyEvent#VK_CAPS_LOCK VK_CAPS_LOCK},
+ * {@link java.awt.event.KeyEvent#VK_NUM_LOCK VK_NUM_LOCK},
+ * {@link java.awt.event.KeyEvent#VK_SCROLL_LOCK VK_SCROLL_LOCK}, and
+ * {@link java.awt.event.KeyEvent#VK_KANA_LOCK VK_KANA_LOCK}.
+ *
+ * @exception java.lang.IllegalArgumentException if <code>keyCode</code>
+ * is not one of the valid key codes
+ * @exception java.lang.UnsupportedOperationException if the host system doesn't
+ * allow getting the state of this key programmatically, or if the keyboard
+ * doesn't have this key
+ * @exception HeadlessException if GraphicsEnvironment.isHeadless()
+ * returns true
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ * @since 1.3
+ */
+ public boolean getLockingKeyState(int keyCode)
+ throws UnsupportedOperationException {
+ if (! (keyCode == KeyEvent.VK_CAPS_LOCK || keyCode == KeyEvent.VK_NUM_LOCK ||
+ keyCode == KeyEvent.VK_SCROLL_LOCK || keyCode == KeyEvent.VK_KANA_LOCK)) {
+ throw new IllegalArgumentException("invalid key for Toolkit.getLockingKeyState");
+ }
+ throw new UnsupportedOperationException("Toolkit.getLockingKeyState");
+ }
+
+ /**
+ * Sets the state of the given locking key on the keyboard.
+ * Valid key codes are
+ * {@link java.awt.event.KeyEvent#VK_CAPS_LOCK VK_CAPS_LOCK},
+ * {@link java.awt.event.KeyEvent#VK_NUM_LOCK VK_NUM_LOCK},
+ * {@link java.awt.event.KeyEvent#VK_SCROLL_LOCK VK_SCROLL_LOCK}, and
+ * {@link java.awt.event.KeyEvent#VK_KANA_LOCK VK_KANA_LOCK}.
+ * <p>
+ * Depending on the platform, setting the state of a locking key may
+ * involve event processing and therefore may not be immediately
+ * observable through getLockingKeyState.
+ *
+ * @exception java.lang.IllegalArgumentException if <code>keyCode</code>
+ * is not one of the valid key codes
+ * @exception java.lang.UnsupportedOperationException if the host system doesn't
+ * allow setting the state of this key programmatically, or if the keyboard
+ * doesn't have this key
+ * @exception HeadlessException if GraphicsEnvironment.isHeadless()
+ * returns true
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ * @since 1.3
+ */
+ public void setLockingKeyState(int keyCode, boolean on)
+ throws UnsupportedOperationException {
+ if (! (keyCode == KeyEvent.VK_CAPS_LOCK || keyCode == KeyEvent.VK_NUM_LOCK ||
+ keyCode == KeyEvent.VK_SCROLL_LOCK || keyCode == KeyEvent.VK_KANA_LOCK)) {
+ throw new IllegalArgumentException("invalid key for Toolkit.setLockingKeyState");
+ }
+ throw new UnsupportedOperationException("Toolkit.setLockingKeyState");
+ }
+
+ /**
+ * Give native peers the ability to query the native container
+ * given a native component (eg the direct parent may be lightweight).
+ */
+ protected static Container getNativeContainer(Component c) {
+ return c.getNativeContainer();
+ }
+
+ /**
+ * Creates a new custom cursor object.
+ * If the image to display is invalid, the cursor will be hidden (made
+ * completely transparent), and the hotspot will be set to (0, 0).
+ *
+ * <p>Note that multi-frame images are invalid and may cause this
+ * method to hang.
+ *
+ * @param cursor the image to display when the cursor is actived
+ * @param hotSpot the X and Y of the large cursor's hot spot; the
+ * hotSpot values must be less than the Dimension returned by
+ * <code>getBestCursorSize</code>
+ * @param name a localized description of the cursor, for Java Accessibility use
+ * @exception IndexOutOfBoundsException if the hotSpot values are outside
+ * the bounds of the cursor
+ * @exception HeadlessException if GraphicsEnvironment.isHeadless()
+ * returns true
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ * @since 1.2
+ */
+ public Cursor createCustomCursor(Image cursor, Point hotSpot, String name)
+ throws IndexOutOfBoundsException, HeadlessException
+ {
+ // Override to implement custom cursor support.
+ if (this != Toolkit.getDefaultToolkit()) {
+ return Toolkit.getDefaultToolkit().
+ createCustomCursor(cursor, hotSpot, name);
+ } else {
+ return new Cursor(Cursor.DEFAULT_CURSOR);
+ }
+ }
+
+ /**
+ * Returns the supported cursor dimension which is closest to the desired
+ * sizes. Systems which only support a single cursor size will return that
+ * size regardless of the desired sizes. Systems which don't support custom
+ * cursors will return a dimension of 0, 0. <p>
+ * Note: if an image is used whose dimensions don't match a supported size
+ * (as returned by this method), the Toolkit implementation will attempt to
+ * resize the image to a supported size.
+ * Since converting low-resolution images is difficult,
+ * no guarantees are made as to the quality of a cursor image which isn't a
+ * supported size. It is therefore recommended that this method
+ * be called and an appropriate image used so no image conversion is made.
+ *
+ * @param preferredWidth the preferred cursor width the component would like
+ * to use.
+ * @param preferredHeight the preferred cursor height the component would like
+ * to use.
+ * @return the closest matching supported cursor size, or a dimension of 0,0 if
+ * the Toolkit implementation doesn't support custom cursors.
+ * @exception HeadlessException if GraphicsEnvironment.isHeadless()
+ * returns true
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ * @since 1.2
+ */
+ public Dimension getBestCursorSize(int preferredWidth,
+ int preferredHeight) throws HeadlessException {
+ // Override to implement custom cursor support.
+ if (this != Toolkit.getDefaultToolkit()) {
+ return Toolkit.getDefaultToolkit().
+ getBestCursorSize(preferredWidth, preferredHeight);
+ } else {
+ return new Dimension(0, 0);
+ }
+ }
+
+ /**
+ * Returns the maximum number of colors the Toolkit supports in a custom cursor
+ * palette.<p>
+ * Note: if an image is used which has more colors in its palette than
+ * the supported maximum, the Toolkit implementation will attempt to flatten the
+ * palette to the maximum. Since converting low-resolution images is difficult,
+ * no guarantees are made as to the quality of a cursor image which has more
+ * colors than the system supports. It is therefore recommended that this method
+ * be called and an appropriate image used so no image conversion is made.
+ *
+ * @return the maximum number of colors, or zero if custom cursors are not
+ * supported by this Toolkit implementation.
+ * @exception HeadlessException if GraphicsEnvironment.isHeadless()
+ * returns true
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ * @since 1.2
+ */
+ public int getMaximumCursorColors() throws HeadlessException {
+ // Override to implement custom cursor support.
+ if (this != Toolkit.getDefaultToolkit()) {
+ return Toolkit.getDefaultToolkit().getMaximumCursorColors();
+ } else {
+ return 0;
+ }
+ }
+
+ /**
+ * Returns whether Toolkit supports this state for
+ * <code>Frame</code>s. This method tells whether the <em>UI
+ * concept</em> of, say, maximization or iconification is
+ * supported. It will always return false for "compound" states
+ * like <code>Frame.ICONIFIED|Frame.MAXIMIZED_VERT</code>.
+ * In other words, the rule of thumb is that only queries with a
+ * single frame state constant as an argument are meaningful.
+ * <p>Note that supporting a given concept is a platform-
+ * dependent feature. Due to native limitations the Toolkit
+ * object may report a particular state as supported, however at
+ * the same time the Toolkit object will be unable to apply the
+ * state to a given frame. This circumstance has two following
+ * consequences:
+ * <ul>
+ * <li>Only the return value of {@code false} for the present
+ * method actually indicates that the given state is not
+ * supported. If the method returns {@code true} the given state
+ * may still be unsupported and/or unavailable for a particular
+ * frame.
+ * <li>The developer should consider examining the value of the
+ * {@link java.awt.event.WindowEvent#getNewState} method of the
+ * {@code WindowEvent} received through the {@link
+ * java.awt.event.WindowStateListener}, rather than assuming
+ * that the state given to the {@code setExtendedState()} method
+ * will be definitely applied. For more information see the
+ * documentation for the {@link Frame#setExtendedState} method.
+ * </ul>
+ *
+ * @param state one of named frame state constants.
+ * @return <code>true</code> is this frame state is supported by
+ * this Toolkit implementation, <code>false</code> otherwise.
+ * @exception HeadlessException
+ * if <code>GraphicsEnvironment.isHeadless()</code>
+ * returns <code>true</code>.
+ * @see java.awt.Window#addWindowStateListener
+ * @since 1.4
+ */
+ public boolean isFrameStateSupported(int state)
+ throws HeadlessException
+ {
+ if (GraphicsEnvironment.isHeadless()){
+ throw new HeadlessException();
+ }
+ if (this != Toolkit.getDefaultToolkit()) {
+ return Toolkit.getDefaultToolkit().
+ isFrameStateSupported(state);
+ } else {
+ return (state == Frame.NORMAL); // others are not guaranteed
+ }
+ }
+
+ /**
+ * Support for I18N: any visible strings should be stored in
+ * sun.awt.resources.awt.properties. The ResourceBundle is stored
+ * here, so that only one copy is maintained.
+ */
+ private static ResourceBundle resources;
+
+ /**
+ * Initialize JNI field and method ids
+ */
+ private static native void initIDs();
+
+ /**
+ * WARNING: This is a temporary workaround for a problem in the
+ * way the AWT loads native libraries. A number of classes in the
+ * AWT package have a native method, initIDs(), which initializes
+ * the JNI field and method ids used in the native portion of
+ * their implementation.
+ *
+ * Since the use and storage of these ids is done by the
+ * implementation libraries, the implementation of these method is
+ * provided by the particular AWT implementations (for example,
+ * "Toolkit"s/Peer), such as Motif, Microsoft Windows, or Tiny. The
+ * problem is that this means that the native libraries must be
+ * loaded by the java.* classes, which do not necessarily know the
+ * names of the libraries to load. A better way of doing this
+ * would be to provide a separate library which defines java.awt.*
+ * initIDs, and exports the relevant symbols out to the
+ * implementation libraries.
+ *
+ * For now, we know it's done by the implementation, and we assume
+ * that the name of the library is "awt". -br.
+ *
+ * If you change loadLibraries(), please add the change to
+ * java.awt.image.ColorModel.loadLibraries(). Unfortunately,
+ * classes can be loaded in java.awt.image that depend on
+ * libawt and there is no way to call Toolkit.loadLibraries()
+ * directly. -hung
+ */
+ private static boolean loaded = false;
+ static void loadLibraries() {
+ if (!loaded) {
+ java.security.AccessController.doPrivileged(
+ new sun.security.action.LoadLibraryAction("awt"));
+ loaded = true;
+ }
+ }
+
+ static {
+ java.security.AccessController.doPrivileged(
+ new java.security.PrivilegedAction() {
+ public Object run() {
+ try {
+ resources =
+ ResourceBundle.getBundle("sun.awt.resources.awt",
+ CoreResourceBundleControl.getRBControlInstance());
+ } catch (MissingResourceException e) {
+ // No resource file; defaults will be used.
+ }
+ return null;
+ }
+ });
+
+ // ensure that the proper libraries are loaded
+ loadLibraries();
+ initAssistiveTechnologies();
+ if (!GraphicsEnvironment.isHeadless()) {
+ initIDs();
+ }
+ }
+
+ /**
+ * Gets a property with the specified key and default.
+ * This method returns defaultValue if the property is not found.
+ */
+ public static String getProperty(String key, String defaultValue) {
+ if (resources != null) {
+ try {
+ return resources.getString(key);
+ }
+ catch (MissingResourceException e) {}
+ }
+
+ return defaultValue;
+ }
+
+ /**
+ * Get the application's or applet's EventQueue instance.
+ * Depending on the Toolkit implementation, different EventQueues
+ * may be returned for different applets. Applets should
+ * therefore not assume that the EventQueue instance returned
+ * by this method will be shared by other applets or the system.
+ *
+ * <p>First, if there is a security manager, its
+ * <code>checkAwtEventQueueAccess</code>
+ * method is called.
+ * If the default implementation of <code>checkAwtEventQueueAccess</code>
+ * is used (that is, that method is not overriden), then this results in
+ * a call to the security manager's <code>checkPermission</code> method
+ * with an <code>AWTPermission("accessEventQueue")</code> permission.
+ *
+ * @return the <code>EventQueue</code> object
+ * @throws SecurityException
+ * if a security manager exists and its <code>{@link
+ * java.lang.SecurityManager#checkAwtEventQueueAccess}</code>
+ * method denies access to the <code>EventQueue</code>
+ * @see java.awt.AWTPermission
+ */
+ public final EventQueue getSystemEventQueue() {
+ SecurityManager security = System.getSecurityManager();
+ if (security != null) {
+ security.checkAwtEventQueueAccess();
+ }
+ return getSystemEventQueueImpl();
+ }
+
+ /**
+ * Gets the application's or applet's <code>EventQueue</code>
+ * instance, without checking access. For security reasons,
+ * this can only be called from a <code>Toolkit</code> subclass.
+ * @return the <code>EventQueue</code> object
+ */
+ protected abstract EventQueue getSystemEventQueueImpl();
+
+ /* Accessor method for use by AWT package routines. */
+ static EventQueue getEventQueue() {
+ return getDefaultToolkit().getSystemEventQueueImpl();
+ }
+
+ /**
+ * Creates the peer for a DragSourceContext.
+ * Always throws InvalidDndOperationException if
+ * GraphicsEnvironment.isHeadless() returns true.
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ */
+ public abstract DragSourceContextPeer createDragSourceContextPeer(DragGestureEvent dge) throws InvalidDnDOperationException;
+
+ /**
+ * Creates a concrete, platform dependent, subclass of the abstract
+ * DragGestureRecognizer class requested, and associates it with the
+ * DragSource, Component and DragGestureListener specified.
+ *
+ * subclasses should override this to provide their own implementation
+ *
+ * @param abstractRecognizerClass The abstract class of the required recognizer
+ * @param ds The DragSource
+ * @param c The Component target for the DragGestureRecognizer
+ * @param srcActions The actions permitted for the gesture
+ * @param dgl The DragGestureListener
+ *
+ * @return the new object or null. Always returns null if
+ * GraphicsEnvironment.isHeadless() returns true.
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ */
+ public <T extends DragGestureRecognizer> T
+ createDragGestureRecognizer(Class<T> abstractRecognizerClass,
+ DragSource ds, Component c, int srcActions,
+ DragGestureListener dgl)
+ {
+ return null;
+ }
+
+ /**
+ * Obtains a value for the specified desktop property.
+ *
+ * A desktop property is a uniquely named value for a resource that
+ * is Toolkit global in nature. Usually it also is an abstract
+ * representation for an underlying platform dependent desktop setting.
+ * For more information on desktop properties supported by the AWT see
+ * <a href="doc-files/DesktopProperties.html">AWT Desktop Properties</a>.
+ */
+ public final synchronized Object getDesktopProperty(String propertyName) {
+ // This is a workaround for headless toolkits. It would be
+ // better to override this method but it is declared final.
+ // "this instanceof" syntax defeats polymorphism.
+ // --mm, 03/03/00
+ if (this instanceof HeadlessToolkit) {
+ return ((HeadlessToolkit)this).getUnderlyingToolkit()
+ .getDesktopProperty(propertyName);
+ }
+
+ if (desktopProperties.isEmpty()) {
+ initializeDesktopProperties();
+ }
+
+ Object value;
+
+ // This property should never be cached
+ if (propertyName.equals("awt.dynamicLayoutSupported")) {
+ value = lazilyLoadDesktopProperty(propertyName);
+ return value;
+ }
+
+ value = desktopProperties.get(propertyName);
+
+ if (value == null) {
+ value = lazilyLoadDesktopProperty(propertyName);
+
+ if (value != null) {
+ setDesktopProperty(propertyName, value);
+ }
+ }
+
+ /* for property "awt.font.desktophints" */
+ if (value instanceof RenderingHints) {
+ value = ((RenderingHints)value).clone();
+ }
+
+ return value;
+ }
+
+ /**
+ * Sets the named desktop property to the specified value and fires a
+ * property change event to notify any listeners that the value has changed.
+ */
+ protected final void setDesktopProperty(String name, Object newValue) {
+ // This is a workaround for headless toolkits. It would be
+ // better to override this method but it is declared final.
+ // "this instanceof" syntax defeats polymorphism.
+ // --mm, 03/03/00
+ if (this instanceof HeadlessToolkit) {
+ ((HeadlessToolkit)this).getUnderlyingToolkit()
+ .setDesktopProperty(name, newValue);
+ return;
+ }
+ Object oldValue;
+
+ synchronized (this) {
+ oldValue = desktopProperties.get(name);
+ desktopProperties.put(name, newValue);
+ }
+
+ desktopPropsSupport.firePropertyChange(name, oldValue, newValue);
+ }
+
+ /**
+ * an opportunity to lazily evaluate desktop property values.
+ */
+ protected Object lazilyLoadDesktopProperty(String name) {
+ return null;
+ }
+
+ /**
+ * initializeDesktopProperties
+ */
+ protected void initializeDesktopProperties() {
+ }
+
+ /**
+ * Adds the specified property change listener for the named desktop
+ * property.
+ * If pcl is null, no exception is thrown and no action is performed.
+ *
+ * @param name The name of the property to listen for
+ * @param pcl The property change listener
+ * @since 1.2
+ */
+ public void addPropertyChangeListener(String name, PropertyChangeListener pcl) {
+ desktopPropsSupport.addPropertyChangeListener(name, pcl);
+ }
+
+ /**
+ * Removes the specified property change listener for the named
+ * desktop property.
+ * If pcl is null, no exception is thrown and no action is performed.
+ *
+ * @param name The name of the property to remove
+ * @param pcl The property change listener
+ * @since 1.2
+ */
+ public void removePropertyChangeListener(String name, PropertyChangeListener pcl) {
+ desktopPropsSupport.removePropertyChangeListener(name, pcl);
+ }
+
+ /**
+ * Returns an array of all the property change listeners
+ * registered on this toolkit.
+ *
+ * @return all of this toolkit's <code>PropertyChangeListener</code>s
+ * or an empty array if no property change
+ * listeners are currently registered
+ *
+ * @since 1.4
+ */
+ public PropertyChangeListener[] getPropertyChangeListeners() {
+ return desktopPropsSupport.getPropertyChangeListeners();
+ }
+
+ /**
+ * Returns an array of all the <code>PropertyChangeListener</code>s
+ * associated with the named property.
+ *
+ * @param propertyName the named property
+ * @return all of the <code>PropertyChangeListener</code>s associated with
+ * the named property or an empty array if no such listeners have
+ * been added
+ * @since 1.4
+ */
+ public PropertyChangeListener[] getPropertyChangeListeners(String propertyName) {
+ return desktopPropsSupport.getPropertyChangeListeners(propertyName);
+ }
+
+ protected final Map<String,Object> desktopProperties =
+ new HashMap<String,Object>();
+ protected final PropertyChangeSupport desktopPropsSupport =
+ Toolkit.createPropertyChangeSupport(this);
+
+ /**
+ * Returns whether the always-on-top mode is supported by this toolkit.
+ * To detect whether the always-on-top mode is supported for a
+ * particular Window, use {@link Window#isAlwaysOnTopSupported}.
+ * @return <code>true</code>, if current toolkit supports the always-on-top mode,
+ * otherwise returns <code>false</code>
+ * @see Window#isAlwaysOnTopSupported
+ * @see Window#setAlwaysOnTop(boolean)
+ * @since 1.6
+ */
+ public boolean isAlwaysOnTopSupported() {
+ return true;
+ }
+
+ /**
+ * Returns whether the given modality type is supported by this toolkit. If
+ * a dialog with unsupported modality type is created, then
+ * <code>Dialog.ModalityType.MODELESS</code> is used instead.
+ *
+ * @param modalityType modality type to be checked for support by this toolkit
+ *
+ * @return <code>true</code>, if current toolkit supports given modality
+ * type, <code>false</code> otherwise
+ *
+ * @see java.awt.Dialog.ModalityType
+ * @see java.awt.Dialog#getModalityType
+ * @see java.awt.Dialog#setModalityType
+ *
+ * @since 1.6
+ */
+ public abstract boolean isModalityTypeSupported(Dialog.ModalityType modalityType);
+
+ /**
+ * Returns whether the given modal exclusion type is supported by this
+ * toolkit. If an unsupported modal exclusion type property is set on a window,
+ * then <code>Dialog.ModalExclusionType.NO_EXCLUDE</code> is used instead.
+ *
+ * @param modalExclusionType modal exclusion type to be checked for support by this toolkit
+ *
+ * @return <code>true</code>, if current toolkit supports given modal exclusion
+ * type, <code>false</code> otherwise
+ *
+ * @see java.awt.Dialog.ModalExclusionType
+ * @see java.awt.Window#getModalExclusionType
+ * @see java.awt.Window#setModalExclusionType
+ *
+ * @since 1.6
+ */
+ public abstract boolean isModalExclusionTypeSupported(Dialog.ModalExclusionType modalExclusionType);
+
+ private static final Logger log = Logger.getLogger("java.awt.Toolkit");
+
+ private static final int LONG_BITS = 64;
+ private int[] calls = new int[LONG_BITS];
+ private static volatile long enabledOnToolkitMask;
+ private AWTEventListener eventListener = null;
+ private WeakHashMap listener2SelectiveListener = new WeakHashMap();
+
+ /*
+ * Extracts a "pure" AWTEventListener from a AWTEventListenerProxy,
+ * if the listener is proxied.
+ */
+ static private AWTEventListener deProxyAWTEventListener(AWTEventListener l)
+ {
+ AWTEventListener localL = l;
+
+ if (localL == null) {
+ return null;
+ }
+ // if user passed in a AWTEventListenerProxy object, extract
+ // the listener
+ if (l instanceof AWTEventListenerProxy) {
+ localL = ((AWTEventListenerProxy)l).getListener();
+ }
+ return localL;
+ }
+
+ /**
+ * Adds an AWTEventListener to receive all AWTEvents dispatched
+ * system-wide that conform to the given <code>eventMask</code>.
+ * <p>
+ * First, if there is a security manager, its <code>checkPermission</code>
+ * method is called with an
+ * <code>AWTPermission("listenToAllAWTEvents")</code> permission.
+ * This may result in a SecurityException.
+ * <p>
+ * <code>eventMask</code> is a bitmask of event types to receive.
+ * It is constructed by bitwise OR-ing together the event masks
+ * defined in <code>AWTEvent</code>.
+ * <p>
+ * Note: event listener use is not recommended for normal
+ * application use, but are intended solely to support special
+ * purpose facilities including support for accessibility,
+ * event record/playback, and diagnostic tracing.
+ *
+ * If listener is null, no exception is thrown and no action is performed.
+ *
+ * @param listener the event listener.
+ * @param eventMask the bitmask of event types to receive
+ * @throws SecurityException
+ * if a security manager exists and its
+ * <code>checkPermission</code> method doesn't allow the operation.
+ * @see #removeAWTEventListener
+ * @see #getAWTEventListeners
+ * @see SecurityManager#checkPermission
+ * @see java.awt.AWTEvent
+ * @see java.awt.AWTPermission
+ * @see java.awt.event.AWTEventListener
+ * @see java.awt.event.AWTEventListenerProxy
+ * @since 1.2
+ */
+ public void addAWTEventListener(AWTEventListener listener, long eventMask) {
+ AWTEventListener localL = deProxyAWTEventListener(listener);
+
+ if (localL == null) {
+ return;
+ }
+ SecurityManager security = System.getSecurityManager();
+ if (security != null) {
+ security.checkPermission(SecurityConstants.ALL_AWT_EVENTS_PERMISSION);
+ }
+ synchronized (this) {
+ SelectiveAWTEventListener selectiveListener =
+ (SelectiveAWTEventListener)listener2SelectiveListener.get(localL);
+
+ if (selectiveListener == null) {
+ // Create a new selectiveListener.
+ selectiveListener = new SelectiveAWTEventListener(localL,
+ eventMask);
+ listener2SelectiveListener.put(localL, selectiveListener);
+ eventListener = ToolkitEventMulticaster.add(eventListener,
+ selectiveListener);
+ }
+ // OR the eventMask into the selectiveListener's event mask.
+ selectiveListener.orEventMasks(eventMask);
+
+ enabledOnToolkitMask |= eventMask;
+
+ long mask = eventMask;
+ for (int i=0; i<LONG_BITS; i++) {
+ // If no bits are set, break out of loop.
+ if (mask == 0) {
+ break;
+ }
+ if ((mask & 1L) != 0) { // Always test bit 0.
+ calls[i]++;
+ }
+ mask >>>= 1; // Right shift, fill with zeros on left.
+ }
+ }
+ }
+
+ /**
+ * Removes an AWTEventListener from receiving dispatched AWTEvents.
+ * <p>
+ * First, if there is a security manager, its <code>checkPermission</code>
+ * method is called with an
+ * <code>AWTPermission("listenToAllAWTEvents")</code> permission.
+ * This may result in a SecurityException.
+ * <p>
+ * Note: event listener use is not recommended for normal
+ * application use, but are intended solely to support special
+ * purpose facilities including support for accessibility,
+ * event record/playback, and diagnostic tracing.
+ *
+ * If listener is null, no exception is thrown and no action is performed.
+ *
+ * @param listener the event listener.
+ * @throws SecurityException
+ * if a security manager exists and its
+ * <code>checkPermission</code> method doesn't allow the operation.
+ * @see #addAWTEventListener
+ * @see #getAWTEventListeners
+ * @see SecurityManager#checkPermission
+ * @see java.awt.AWTEvent
+ * @see java.awt.AWTPermission
+ * @see java.awt.event.AWTEventListener
+ * @see java.awt.event.AWTEventListenerProxy
+ * @since 1.2
+ */
+ public void removeAWTEventListener(AWTEventListener listener) {
+ AWTEventListener localL = deProxyAWTEventListener(listener);
+
+ if (listener == null) {
+ return;
+ }
+ SecurityManager security = System.getSecurityManager();
+ if (security != null) {
+ security.checkPermission(SecurityConstants.ALL_AWT_EVENTS_PERMISSION);
+ }
+
+ synchronized (this) {
+ SelectiveAWTEventListener selectiveListener =
+ (SelectiveAWTEventListener)listener2SelectiveListener.get(localL);
+
+ if (selectiveListener != null) {
+ listener2SelectiveListener.remove(localL);
+ int[] listenerCalls = selectiveListener.getCalls();
+ for (int i=0; i<LONG_BITS; i++) {
+ calls[i] -= listenerCalls[i];
+ assert calls[i] >= 0: "Negative Listeners count";
+
+ if (calls[i] == 0) {
+ enabledOnToolkitMask &= ~(1L<<i);
+ }
+ }
+ }
+ eventListener = ToolkitEventMulticaster.remove(eventListener,
+ (selectiveListener == null) ? localL : selectiveListener);
+ }
+ }
+
+ static boolean enabledOnToolkit(long eventMask) {
+ return (enabledOnToolkitMask & eventMask) != 0;
+ }
+
+ synchronized int countAWTEventListeners(long eventMask) {
+ if (log.isLoggable(Level.FINE)) {
+ if (eventMask == 0) {
+ log.log(Level.FINE, "Assertion (eventMask != 0) failed");
+ }
+ }
+
+ int ci = 0;
+ for (; eventMask != 0; eventMask >>>= 1, ci++) {
+ }
+ ci--;
+ return calls[ci];
+ }
+ /**
+ * Returns an array of all the <code>AWTEventListener</code>s
+ * registered on this toolkit.
+ * If there is a security manager, its {@code checkPermission}
+ * method is called with an
+ * {@code AWTPermission("listenToAllAWTEvents")} permission.
+ * This may result in a SecurityException.
+ * Listeners can be returned
+ * within <code>AWTEventListenerProxy</code> objects, which also contain
+ * the event mask for the given listener.
+ * Note that listener objects
+ * added multiple times appear only once in the returned array.
+ *
+ * @return all of the <code>AWTEventListener</code>s or an empty
+ * array if no listeners are currently registered
+ * @throws SecurityException
+ * if a security manager exists and its
+ * <code>checkPermission</code> method doesn't allow the operation.
+ * @see #addAWTEventListener
+ * @see #removeAWTEventListener
+ * @see SecurityManager#checkPermission
+ * @see java.awt.AWTEvent
+ * @see java.awt.AWTPermission
+ * @see java.awt.event.AWTEventListener
+ * @see java.awt.event.AWTEventListenerProxy
+ * @since 1.4
+ */
+ public AWTEventListener[] getAWTEventListeners() {
+ SecurityManager security = System.getSecurityManager();
+ if (security != null) {
+ security.checkPermission(SecurityConstants.ALL_AWT_EVENTS_PERMISSION);
+ }
+ synchronized (this) {
+ EventListener[] la = ToolkitEventMulticaster.getListeners(eventListener,AWTEventListener.class);
+
+ AWTEventListener[] ret = new AWTEventListener[la.length];
+ for (int i = 0; i < la.length; i++) {
+ SelectiveAWTEventListener sael = (SelectiveAWTEventListener)la[i];
+ AWTEventListener tempL = sael.getListener();
+ //assert tempL is not an AWTEventListenerProxy - we should
+ // have weeded them all out
+ // don't want to wrap a proxy inside a proxy
+ ret[i] = new AWTEventListenerProxy(sael.getEventMask(), tempL);
+ }
+ return ret;
+ }
+ }
+
+ /**
+ * Returns an array of all the <code>AWTEventListener</code>s
+ * registered on this toolkit which listen to all of the event
+ * types specified in the {@code eventMask} argument.
+ * If there is a security manager, its {@code checkPermission}
+ * method is called with an
+ * {@code AWTPermission("listenToAllAWTEvents")} permission.
+ * This may result in a SecurityException.
+ * Listeners can be returned
+ * within <code>AWTEventListenerProxy</code> objects, which also contain
+ * the event mask for the given listener.
+ * Note that listener objects
+ * added multiple times appear only once in the returned array.
+ *
+ * @param eventMask the bitmask of event types to listen for
+ * @return all of the <code>AWTEventListener</code>s registered
+ * on this toolkit for the specified
+ * event types, or an empty array if no such listeners
+ * are currently registered
+ * @throws SecurityException
+ * if a security manager exists and its
+ * <code>checkPermission</code> method doesn't allow the operation.
+ * @see #addAWTEventListener
+ * @see #removeAWTEventListener
+ * @see SecurityManager#checkPermission
+ * @see java.awt.AWTEvent
+ * @see java.awt.AWTPermission
+ * @see java.awt.event.AWTEventListener
+ * @see java.awt.event.AWTEventListenerProxy
+ * @since 1.4
+ */
+ public AWTEventListener[] getAWTEventListeners(long eventMask) {
+ SecurityManager security = System.getSecurityManager();
+ if (security != null) {
+ security.checkPermission(SecurityConstants.ALL_AWT_EVENTS_PERMISSION);
+ }
+ synchronized (this) {
+ EventListener[] la = ToolkitEventMulticaster.getListeners(eventListener,AWTEventListener.class);
+
+ java.util.List list = new ArrayList(la.length);
+
+ for (int i = 0; i < la.length; i++) {
+ SelectiveAWTEventListener sael = (SelectiveAWTEventListener)la[i];
+ if ((sael.getEventMask() & eventMask) == eventMask) {
+ //AWTEventListener tempL = sael.getListener();
+ list.add(new AWTEventListenerProxy(sael.getEventMask(),
+ sael.getListener()));
+ }
+ }
+ return (AWTEventListener[])list.toArray(new AWTEventListener[0]);
+ }
+ }
+
+ /*
+ * This method notifies any AWTEventListeners that an event
+ * is about to be dispatched.
+ *
+ * @param theEvent the event which will be dispatched.
+ */
+ void notifyAWTEventListeners(AWTEvent theEvent) {
+ // This is a workaround for headless toolkits. It would be
+ // better to override this method but it is declared package private.
+ // "this instanceof" syntax defeats polymorphism.
+ // --mm, 03/03/00
+ if (this instanceof HeadlessToolkit) {
+ ((HeadlessToolkit)this).getUnderlyingToolkit()
+ .notifyAWTEventListeners(theEvent);
+ return;
+ }
+
+ AWTEventListener eventListener = this.eventListener;
+ if (eventListener != null) {
+ eventListener.eventDispatched(theEvent);
+ }
+ }
+
+ static private class ToolkitEventMulticaster extends AWTEventMulticaster
+ implements AWTEventListener {
+ // Implementation cloned from AWTEventMulticaster.
+
+ ToolkitEventMulticaster(AWTEventListener a, AWTEventListener b) {
+ super(a, b);
+ }
+
+ static AWTEventListener add(AWTEventListener a,
+ AWTEventListener b) {
+ if (a == null) return b;
+ if (b == null) return a;
+ return new ToolkitEventMulticaster(a, b);
+ }
+
+ static AWTEventListener remove(AWTEventListener l,
+ AWTEventListener oldl) {
+ return (AWTEventListener) removeInternal(l, oldl);
+ }
+
+ // #4178589: must overload remove(EventListener) to call our add()
+ // instead of the static addInternal() so we allocate a
+ // ToolkitEventMulticaster instead of an AWTEventMulticaster.
+ // Note: this method is called by AWTEventListener.removeInternal(),
+ // so its method signature must match AWTEventListener.remove().
+ protected EventListener remove(EventListener oldl) {
+ if (oldl == a) return b;
+ if (oldl == b) return a;
+ AWTEventListener a2 = (AWTEventListener)removeInternal(a, oldl);
+ AWTEventListener b2 = (AWTEventListener)removeInternal(b, oldl);
+ if (a2 == a && b2 == b) {
+ return this; // it's not here
+ }
+ return add(a2, b2);
+ }
+
+ public void eventDispatched(AWTEvent event) {
+ ((AWTEventListener)a).eventDispatched(event);
+ ((AWTEventListener)b).eventDispatched(event);
+ }
+ }
+
+ private class SelectiveAWTEventListener implements AWTEventListener {
+ AWTEventListener listener;
+ private long eventMask;
+ // This array contains the number of times to call the eventlistener
+ // for each event type.
+ int[] calls = new int[Toolkit.LONG_BITS];
+
+ public AWTEventListener getListener() {return listener;}
+ public long getEventMask() {return eventMask;}
+ public int[] getCalls() {return calls;}
+
+ public void orEventMasks(long mask) {
+ eventMask |= mask;
+ // For each event bit set in mask, increment its call count.
+ for (int i=0; i<Toolkit.LONG_BITS; i++) {
+ // If no bits are set, break out of loop.
+ if (mask == 0) {
+ break;
+ }
+ if ((mask & 1L) != 0) { // Always test bit 0.
+ calls[i]++;
+ }
+ mask >>>= 1; // Right shift, fill with zeros on left.
+ }
+ }
+
+ SelectiveAWTEventListener(AWTEventListener l, long mask) {
+ listener = l;
+ eventMask = mask;
+ }
+
+ public void eventDispatched(AWTEvent event) {
+ long eventBit = 0; // Used to save the bit of the event type.
+ if (((eventBit = eventMask & AWTEvent.COMPONENT_EVENT_MASK) != 0 &&
+ event.id >= ComponentEvent.COMPONENT_FIRST &&
+ event.id <= ComponentEvent.COMPONENT_LAST)
+ || ((eventBit = eventMask & AWTEvent.CONTAINER_EVENT_MASK) != 0 &&
+ event.id >= ContainerEvent.CONTAINER_FIRST &&
+ event.id <= ContainerEvent.CONTAINER_LAST)
+ || ((eventBit = eventMask & AWTEvent.FOCUS_EVENT_MASK) != 0 &&
+ event.id >= FocusEvent.FOCUS_FIRST &&
+ event.id <= FocusEvent.FOCUS_LAST)
+ || ((eventBit = eventMask & AWTEvent.KEY_EVENT_MASK) != 0 &&
+ event.id >= KeyEvent.KEY_FIRST &&
+ event.id <= KeyEvent.KEY_LAST)
+ || ((eventBit = eventMask & AWTEvent.MOUSE_WHEEL_EVENT_MASK) != 0 &&
+ event.id == MouseEvent.MOUSE_WHEEL)
+ || ((eventBit = eventMask & AWTEvent.MOUSE_MOTION_EVENT_MASK) != 0 &&
+ (event.id == MouseEvent.MOUSE_MOVED ||
+ event.id == MouseEvent.MOUSE_DRAGGED))
+ || ((eventBit = eventMask & AWTEvent.MOUSE_EVENT_MASK) != 0 &&
+ event.id != MouseEvent.MOUSE_MOVED &&
+ event.id != MouseEvent.MOUSE_DRAGGED &&
+ event.id != MouseEvent.MOUSE_WHEEL &&
+ event.id >= MouseEvent.MOUSE_FIRST &&
+ event.id <= MouseEvent.MOUSE_LAST)
+ || ((eventBit = eventMask & AWTEvent.WINDOW_EVENT_MASK) != 0 &&
+ (event.id >= WindowEvent.WINDOW_FIRST &&
+ event.id <= WindowEvent.WINDOW_LAST))
+ || ((eventBit = eventMask & AWTEvent.ACTION_EVENT_MASK) != 0 &&
+ event.id >= ActionEvent.ACTION_FIRST &&
+ event.id <= ActionEvent.ACTION_LAST)
+ || ((eventBit = eventMask & AWTEvent.ADJUSTMENT_EVENT_MASK) != 0 &&
+ event.id >= AdjustmentEvent.ADJUSTMENT_FIRST &&
+ event.id <= AdjustmentEvent.ADJUSTMENT_LAST)
+ || ((eventBit = eventMask & AWTEvent.ITEM_EVENT_MASK) != 0 &&
+ event.id >= ItemEvent.ITEM_FIRST &&
+ event.id <= ItemEvent.ITEM_LAST)
+ || ((eventBit = eventMask & AWTEvent.TEXT_EVENT_MASK) != 0 &&
+ event.id >= TextEvent.TEXT_FIRST &&
+ event.id <= TextEvent.TEXT_LAST)
+ || ((eventBit = eventMask & AWTEvent.INPUT_METHOD_EVENT_MASK) != 0 &&
+ event.id >= InputMethodEvent.INPUT_METHOD_FIRST &&
+ event.id <= InputMethodEvent.INPUT_METHOD_LAST)
+ || ((eventBit = eventMask & AWTEvent.PAINT_EVENT_MASK) != 0 &&
+ event.id >= PaintEvent.PAINT_FIRST &&
+ event.id <= PaintEvent.PAINT_LAST)
+ || ((eventBit = eventMask & AWTEvent.INVOCATION_EVENT_MASK) != 0 &&
+ event.id >= InvocationEvent.INVOCATION_FIRST &&
+ event.id <= InvocationEvent.INVOCATION_LAST)
+ || ((eventBit = eventMask & AWTEvent.HIERARCHY_EVENT_MASK) != 0 &&
+ event.id == HierarchyEvent.HIERARCHY_CHANGED)
+ || ((eventBit = eventMask & AWTEvent.HIERARCHY_BOUNDS_EVENT_MASK) != 0 &&
+ (event.id == HierarchyEvent.ANCESTOR_MOVED ||
+ event.id == HierarchyEvent.ANCESTOR_RESIZED))
+ || ((eventBit = eventMask & AWTEvent.WINDOW_STATE_EVENT_MASK) != 0 &&
+ event.id == WindowEvent.WINDOW_STATE_CHANGED)
+ || ((eventBit = eventMask & AWTEvent.WINDOW_FOCUS_EVENT_MASK) != 0 &&
+ (event.id == WindowEvent.WINDOW_GAINED_FOCUS ||
+ event.id == WindowEvent.WINDOW_LOST_FOCUS))
+ || ((eventBit = eventMask & sun.awt.SunToolkit.GRAB_EVENT_MASK) != 0 &&
+ (event instanceof sun.awt.UngrabEvent))) {
+ // Get the index of the call count for this event type.
+ // Instead of using Math.log(...) we will calculate it with
+ // bit shifts. That's what previous implementation looked like:
+ //
+ // int ci = (int) (Math.log(eventBit)/Math.log(2));
+ int ci = 0;
+ for (long eMask = eventBit; eMask != 0; eMask >>>= 1, ci++) {
+ }
+ ci--;
+ // Call the listener as many times as it was added for this
+ // event type.
+ for (int i=0; i<calls[ci]; i++) {
+ listener.eventDispatched(event);
+ }
+ }
+ }
+ }
+
+ /**
+ * Returns a map of visual attributes for the abstract level description
+ * of the given input method highlight, or null if no mapping is found.
+ * The style field of the input method highlight is ignored. The map
+ * returned is unmodifiable.
+ * @param highlight input method highlight
+ * @return style attribute map, or <code>null</code>
+ * @exception HeadlessException if
+ * <code>GraphicsEnvironment.isHeadless</code> returns true
+ * @see java.awt.GraphicsEnvironment#isHeadless
+ * @since 1.3
+ */
+ public abstract Map<java.awt.font.TextAttribute,?>
+ mapInputMethodHighlight(InputMethodHighlight highlight)
+ throws HeadlessException;
+
+ private static PropertyChangeSupport createPropertyChangeSupport(Toolkit toolkit) {
+ if (toolkit instanceof SunToolkit || toolkit instanceof HeadlessToolkit) {
+ return new DesktopPropertyChangeSupport(toolkit);
+ } else {
+ return new PropertyChangeSupport(toolkit);
+ }
+ }
+
+ private static class DesktopPropertyChangeSupport extends PropertyChangeSupport {
+ private static final StringBuilder PROP_CHANGE_SUPPORT_KEY =
+ new StringBuilder("desktop property change support key");
+ private final Object source;
+
+ public DesktopPropertyChangeSupport(Object sourceBean) {
+ super(sourceBean);
+ source = sourceBean;
+ }
+
+ @Override
+ public synchronized void addPropertyChangeListener(
+ String propertyName,
+ PropertyChangeListener listener)
+ {
+ PropertyChangeSupport pcs = (PropertyChangeSupport)
+ AppContext.getAppContext().get(PROP_CHANGE_SUPPORT_KEY);
+ if (null == pcs) {
+ pcs = new PropertyChangeSupport(source);
+ AppContext.getAppContext().put(PROP_CHANGE_SUPPORT_KEY, pcs);
+ }
+ pcs.addPropertyChangeListener(propertyName, listener);
+ }
+
+ @Override
+ public synchronized void removePropertyChangeListener(
+ String propertyName,
+ PropertyChangeListener listener)
+ {
+ PropertyChangeSupport pcs = (PropertyChangeSupport)
+ AppContext.getAppContext().get(PROP_CHANGE_SUPPORT_KEY);
+ if (null != pcs) {
+ pcs.removePropertyChangeListener(propertyName, listener);
+ }
+ }
+
+ @Override
+ public synchronized PropertyChangeListener[] getPropertyChangeListeners()
+ {
+ PropertyChangeSupport pcs = (PropertyChangeSupport)
+ AppContext.getAppContext().get(PROP_CHANGE_SUPPORT_KEY);
+ if (null != pcs) {
+ return pcs.getPropertyChangeListeners();
+ } else {
+ return new PropertyChangeListener[0];
+ }
+ }
+
+ @Override
+ public synchronized PropertyChangeListener[] getPropertyChangeListeners(String propertyName)
+ {
+ PropertyChangeSupport pcs = (PropertyChangeSupport)
+ AppContext.getAppContext().get(PROP_CHANGE_SUPPORT_KEY);
+ if (null != pcs) {
+ return pcs.getPropertyChangeListeners(propertyName);
+ } else {
+ return new PropertyChangeListener[0];
+ }
+ }
+
+ @Override
+ public synchronized void addPropertyChangeListener(PropertyChangeListener listener) {
+ PropertyChangeSupport pcs = (PropertyChangeSupport)
+ AppContext.getAppContext().get(PROP_CHANGE_SUPPORT_KEY);
+ if (null == pcs) {
+ pcs = new PropertyChangeSupport(source);
+ AppContext.getAppContext().put(PROP_CHANGE_SUPPORT_KEY, pcs);
+ }
+ pcs.addPropertyChangeListener(listener);
+ }
+
+ @Override
+ public synchronized void removePropertyChangeListener(PropertyChangeListener listener) {
+ PropertyChangeSupport pcs = (PropertyChangeSupport)
+ AppContext.getAppContext().get(PROP_CHANGE_SUPPORT_KEY);
+ if (null != pcs) {
+ pcs.removePropertyChangeListener(listener);
+ }
+ }
+
+ /*
+ * we do expect that all other fireXXX() methods of java.beans.PropertyChangeSupport
+ * use this method. If this will be changed we will need to change this class.
+ */
+ @Override
+ public void firePropertyChange(final PropertyChangeEvent evt) {
+ Object oldValue = evt.getOldValue();
+ Object newValue = evt.getNewValue();
+ String propertyName = evt.getPropertyName();
+ if (oldValue != null && newValue != null && oldValue.equals(newValue)) {
+ return;
+ }
+ Runnable updater = new Runnable() {
+ public void run() {
+ PropertyChangeSupport pcs = (PropertyChangeSupport)
+ AppContext.getAppContext().get(PROP_CHANGE_SUPPORT_KEY);
+ if (null != pcs) {
+ pcs.firePropertyChange(evt);
+ }
+ }
+ };
+ final AppContext currentAppContext = AppContext.getAppContext();
+ for (AppContext appContext : AppContext.getAppContexts()) {
+ if (null == appContext || appContext.isDisposed()) {
+ continue;
+ }
+ if (currentAppContext == appContext) {
+ updater.run();
+ } else {
+ final PeerEvent e = new PeerEvent(source, updater, PeerEvent.ULTIMATE_PRIORITY_EVENT);
+ SunToolkit.postEvent(appContext, e);
+ }
+ }
+ }
+ }
+}