/**
	 * Set the state of the min / max buttons on the CTF based on the model element's state. The
	 * input is expected to be the element that contains the min/max state info which should either
	 * be an MPartStack or an MPlaceholder for the shared area.
	 * 
	 * @param element
	 *            The element to test
	 */
	private void adjustCTFButtons(MUIElement element) {
		if (!(element instanceof MPartStack) && !(element instanceof MPlaceholder))
			return;

		CTabFolder ctf = getCTFFor(element);
		if (ctf == null)
			return;

		if (element instanceof MPlaceholder) {
			setCTFButtons(ctf, element, false);
		} else {
			MArea area = getAreaFor((MPartStack) element);
			if (area == null) {
				setCTFButtons(ctf, element, false);
			}
		}
	}

private void setCTFButtons(CTabFolder ctf, MUIElement stateElement, boolean hideButtons) {
		if (hideButtons) {
			ctf.setMinimizeVisible(false);
			ctf.setMaximizeVisible(false);
		} else {
			if (stateElement.getTags().contains(MINIMIZED)) {
				ctf.setMinimizeVisible(false);
				ctf.setMaximizeVisible(true);
				ctf.setMaximized(true);
			} else if (stateElement.getTags().contains(MAXIMIZED)) {
				ctf.setMinimizeVisible(true);
				ctf.setMaximizeVisible(true);
				ctf.setMaximized(true);
			} else {
				ctf.setMinimizeVisible(true);
				ctf.setMaximizeVisible(true);
				ctf.setMinimized(false);
				ctf.setMaximized(false);
				ctf.layout();
			}
		}
	}

public class StackRendererIvu extends StackRenderer {

    /**
     * The Application model tag, which displays min/max Buttons in the right/upper corner of the
     * CTabFolder.
     */
    private static final String WINDOWTAG_MINMAX = "minmax";

    private static final Logger LOG = LoggerFactory.getLogger(StackRendererIvu.class);

    @Override
    public Object createWidget(MUIElement element, Object parent) {

        Object o = super.createWidget(element, parent);

        // the super class, which is the native renderer - renders a CTabFolder for the MPartStack
        try {

            MPartStack stack = (MPartStack) element;
            CTabFolder ctf = (CTabFolder) o;

            if (!stack.getTags().contains(WINDOWTAG_MINMAX)) {
                ctf.setMinimizeVisible(false);
                ctf.setMaximizeVisible(false);
            }

        } catch (Exception e) {
            LOG.warn("Failed to cast the Widget, which was rendered for a MPartStack to a CTabFolder");
        }
        return o;
    }
}