GL11.glPushAttrib(GL11.GL_ALL_ATTRIB_BITS);
try {
Renderer renderer = new LWJGLRenderer();
ThemeManager theme = loadTheme(renderer);
gui = new GUI(emptyRootWidget, renderer, null);
gui.applyTheme(theme);
Input input = getContainer().getInput();
TWLInputForwarder inputForwarder = new TWLInputForwarder(gui, input);
input.addPrimaryListener(inputForwarder);