static synchronized void initializeSwing() {
   if (swingInitialized) return;
   swingInitialized = true;
   /*
    * Feature in GTK.  The default X error handler
    * for GTK calls exit() after printing the X error.
    * Normally, this isn't that big a problem for SWT
    * applications because they don't cause X errors.
    * However, sometimes X errors are generated by AWT
    * that make SWT exit.  The fix is to hide all X
    * errors when AWT is running.
    */
   OS.gdk_error_trap_push();
   try {
     /* Initialize the default focus traversal policy */
     Class[] emptyClass = new Class[0];
     Object[] emptyObject = new Object[0];
     Class clazz = Class.forName("javax.swing.UIManager");
     Method method = clazz.getMethod("getDefaults", emptyClass);
     if (method != null) method.invoke(clazz, emptyObject);
   } catch (Throwable e) {
   }
 }
  /**
   * Creates a new <code>java.awt.Frame</code>. This frame is the root for the AWT components that
   * will be embedded within the composite. In order for the embedding to succeed, the composite
   * must have been created with the SWT.EMBEDDED style.
   *
   * <p>IMPORTANT: As of JDK1.5, the embedded frame does not receive mouse events. When a
   * lightweight component is added as a child of the embedded frame, the cursor does not change. In
   * order to work around both these problems, it is strongly recommended that a heavyweight
   * component such as <code>java.awt.Panel</code> be added to the frame as the root of all
   * components.
   *
   * @param parent the parent <code>Composite</code> of the new <code>java.awt.Frame</code>
   * @return a <code>java.awt.Frame</code> to be the parent of the embedded AWT components
   * @exception IllegalArgumentException
   *     <ul>
   *       <li>ERROR_NULL_ARGUMENT - if the parent is null
   *       <li>ERROR_INVALID_ARGUMENT - if the parent Composite does not have the SWT.EMBEDDED style
   *     </ul>
   *
   * @since 3.0
   */
  public static Frame new_Frame(final Composite parent) {
    if (parent == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
    if ((parent.getStyle() & SWT.EMBEDDED) == 0) {
      SWT.error(SWT.ERROR_INVALID_ARGUMENT);
    }
    int /*long*/ handle = parent.embeddedHandle;
    /*
     * Some JREs have implemented the embedded frame constructor to take an integer
     * and other JREs take a long.  To handle this binary incompatibility, use
     * reflection to create the embedded frame.
     */
    Class clazz = null;
    try {
      String className =
          embeddedFrameClass != null ? embeddedFrameClass : "sun.awt.X11.XEmbeddedFrame";
      clazz = Class.forName(className);
    } catch (Throwable e) {
      SWT.error(SWT.ERROR_NOT_IMPLEMENTED, e, " [need JDK 1.5 or greater]");
    }
    initializeSwing();
    Object value = null;
    Constructor constructor = null;
    try {
      constructor = clazz.getConstructor(new Class[] {int.class, boolean.class});
      value =
          constructor.newInstance(new Object[] {new Integer((int) /*64*/ handle), Boolean.TRUE});
    } catch (Throwable e1) {
      try {
        constructor = clazz.getConstructor(new Class[] {long.class, boolean.class});
        value = constructor.newInstance(new Object[] {new Long(handle), Boolean.TRUE});
      } catch (Throwable e2) {
        SWT.error(SWT.ERROR_NOT_IMPLEMENTED, e2);
      }
    }
    final Frame frame = (Frame) value;
    parent.setData(EMBEDDED_FRAME_KEY, frame);
    if (Device.DEBUG) {
      loadLibrary();
      setDebug(frame, true);
    }
    try {
      /* Call registerListeners() to make XEmbed focus traversal work */
      Method method = clazz.getMethod("registerListeners", null);
      if (method != null) method.invoke(value, null);
    } catch (Throwable e) {
    }
    final AWTEventListener awtListener =
        new AWTEventListener() {
          public void eventDispatched(AWTEvent event) {
            if (event.getID() == WindowEvent.WINDOW_OPENED) {
              final Window window = (Window) event.getSource();
              if (window.getParent() == frame) {
                parent
                    .getDisplay()
                    .asyncExec(
                        new Runnable() {
                          public void run() {
                            if (parent.isDisposed()) return;
                            Shell shell = parent.getShell();
                            loadLibrary();
                            int /*long*/ awtHandle = getAWTHandle(window);
                            if (awtHandle == 0) return;
                            int /*long*/ xWindow =
                                OS.gdk_x11_drawable_get_xid(
                                    OS.GTK_WIDGET_WINDOW(OS.gtk_widget_get_toplevel(shell.handle)));
                            OS.XSetTransientForHint(
                                OS.gdk_x11_display_get_xdisplay(OS.gdk_display_get_default()),
                                awtHandle,
                                xWindow);
                          }
                        });
              }
            }
          }
        };
    frame.getToolkit().addAWTEventListener(awtListener, AWTEvent.WINDOW_EVENT_MASK);
    final Listener shellListener =
        new Listener() {
          public void handleEvent(Event e) {
            switch (e.type) {
              case SWT.Deiconify:
                EventQueue.invokeLater(
                    new Runnable() {
                      public void run() {
                        frame.dispatchEvent(new WindowEvent(frame, WindowEvent.WINDOW_DEICONIFIED));
                      }
                    });
                break;
              case SWT.Iconify:
                EventQueue.invokeLater(
                    new Runnable() {
                      public void run() {
                        frame.dispatchEvent(new WindowEvent(frame, WindowEvent.WINDOW_ICONIFIED));
                      }
                    });
                break;
            }
          }
        };
    Shell shell = parent.getShell();
    shell.addListener(SWT.Deiconify, shellListener);
    shell.addListener(SWT.Iconify, shellListener);

    Listener listener =
        new Listener() {
          public void handleEvent(Event e) {
            switch (e.type) {
              case SWT.Dispose:
                Shell shell = parent.getShell();
                shell.removeListener(SWT.Deiconify, shellListener);
                shell.removeListener(SWT.Iconify, shellListener);
                parent.setVisible(false);
                EventQueue.invokeLater(
                    new Runnable() {
                      public void run() {
                        frame.getToolkit().removeAWTEventListener(awtListener);
                        frame.dispose();
                      }
                    });
                break;
              case SWT.Resize:
                if (Library.JAVA_VERSION >= Library.JAVA_VERSION(1, 6, 0)) {
                  final Rectangle clientArea = parent.getClientArea();
                  EventQueue.invokeLater(
                      new Runnable() {
                        public void run() {
                          frame.setSize(clientArea.width, clientArea.height);
                        }
                      });
                }
                break;
            }
          }
        };
    parent.addListener(SWT.Dispose, listener);
    parent.addListener(SWT.Resize, listener);

    parent
        .getDisplay()
        .asyncExec(
            new Runnable() {
              public void run() {
                if (parent.isDisposed()) return;
                final Rectangle clientArea = parent.getClientArea();
                EventQueue.invokeLater(
                    new Runnable() {
                      public void run() {
                        frame.setSize(clientArea.width, clientArea.height);
                        frame.validate();
                      }
                    });
              }
            });
    return frame;
  }