private static void writeCloseListener(final Shell shell) throws IOException {
   //    JSWriter writer = JSWriter.getWriterFor( shell );
   Boolean newValue = Boolean.valueOf(ShellEvent.hasListener(shell));
   Boolean defValue = Boolean.FALSE;
   //    writer.set( PROP_SHELL_LISTENER, "hasShellListener", newValue, defValue );
   boolean hasChanged = WidgetLCAUtil.hasChanged(shell, PROP_SHELL_LISTENER, newValue, defValue);
   if (hasChanged) {
     IWidgetSynchronizer synchronizer = WidgetSynchronizerFactory.getSynchronizerForWidget(shell);
     if (newValue.booleanValue()) {
       synchronizer.addListener("closelistener");
     } else {
       synchronizer.removeListener("closelistener");
     }
   }
 }
 public void preserveValues(final Widget widget) {
   ControlLCAUtil.preserveValues((Control) widget);
   Shell shell = (Shell) widget;
   IWidgetAdapter adapter = WidgetUtil.getAdapter(shell);
   adapter.preserve(PROP_ACTIVE_CONTROL, getActiveControl(shell));
   adapter.preserve(PROP_ACTIVE_SHELL, shell.getDisplay().getActiveShell());
   adapter.preserve(PROP_TEXT, shell.getText());
   adapter.preserve(PROP_IMAGE, shell.getImage());
   adapter.preserve(PROP_ALPHA, new Integer(shell.getAlpha()));
   adapter.preserve(PROP_MODE, getMode(shell));
   adapter.preserve(PROP_FULLSCREEN, Boolean.valueOf(shell.getFullScreen()));
   adapter.preserve(PROP_SHELL_LISTENER, Boolean.valueOf(ShellEvent.hasListener(shell)));
   adapter.preserve(PROP_SHELL_MENU, shell.getMenuBar());
   adapter.preserve(PROP_MINIMUM_SIZE, shell.getMinimumSize());
   WidgetLCAUtil.preserveCustomVariant(shell);
 }
 private static void writeFullScreen(final Shell shell) throws IOException {
   Object defValue = Boolean.FALSE;
   Boolean newValue = Boolean.valueOf(shell.getFullScreen());
   if (WidgetLCAUtil.hasChanged(shell, PROP_FULLSCREEN, newValue, defValue)) {
     //      JSWriter writer = JSWriter.getWriterFor( shell );
     //      writer.set( "fullScreen", newValue );
     IWidgetSynchronizer synchronizer = WidgetSynchronizerFactory.getSynchronizerForWidget(shell);
     synchronizer.setWidgetProperty("fullScreen", newValue);
   }
 }
 private static void writeOpen(final Shell shell) throws IOException {
   // TODO [rst] workaround: qx window should be opened only once.
   Boolean defValue = Boolean.FALSE;
   Boolean actValue = Boolean.valueOf(shell.getVisible());
   if (WidgetLCAUtil.hasChanged(shell, Props.VISIBLE, actValue, defValue) && shell.getVisible()) {
     //      JSWriter writer = JSWriter.getWriterFor( shell );
     //      writer.call( "open", null );
     IWidgetSynchronizer synchronizer = WidgetSynchronizerFactory.getSynchronizerForWidget(shell);
     synchronizer.call("open");
   }
 }