!7

sclass FullScreen extends DynModule {
  transient JButton btn;
  
  JComponent visualize() {
    ret btn = jbutton("Full-screen on", r switchIt);
  }
  
  void switchIt {
    JDesktopPane desktop = cast get(creator(), 'desktop);
    if (desktop == null) ret;
    Window w = getWindow(desktop);
    if (!isFullScreen(desktop))
      callCreator('cleanExitOnFrameClose, showFullScreen(desktop));
    else
      callCreator('cleanExitOnFrameClose, showMaximizedFrame(desktop));
    w.setVisible(false);
  }
}