package aasdaa;

import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Event;

public class HelloWorld extends Composite {

	public HelloWorld(Composite parent, int style) {
		super(parent, style);
		// TODO Auto-generated constructor stub
	}

	/**
	 * @param Object
	 * @param Event
	 */
	protected void onSelection(Object o, Event event) {
		System.out.println("Button pressed");
	}

	/**
	 * @param Object
	 * @param Event
	 */
	public void onModifyCombo(Object object, Event event) {
		System.out.println("Combo modified");
	}

}

<Composite xmlns="http://www.eclipse.org/xwt/presentation"
	 xmlns:x="http://www.eclipse.org/xwt"
	 xmlns:c="clr-namespace:aasdaa"
	 xmlns:j="clr-namespace:java.lang"
	 x:Class="aasdaa.HelloWorld">
	 <Composite.layout>
		 <GridLayout  numColumns="3" />
	 </Composite.layout>
<Button text="hello" x:style="SWT.PUSH" selectionEvent="onSelection">
</Button>
<Combo x:style="SWT.NONE" modifyEvent="onModifyCombo">
<Combo.items></Combo.items>
</Combo>
</Composite>

XWT.load(parent,url,this)

public abstract class AbstractXWTComposite extends Composite {
	private static Logger log = Logger.getLogger(AbstractXWTComposite.class);
	
	static {
	ILoadingContext lctx = new DefaultLoadingContext(loader) {
		@Override
		public Class<?> loadClass(String name) {
			try {
				Class<?> ret = super.loadClass(name);
				return ret;
			} catch (Exception e) {
				;
			}
			return FrameworkUtil.getBundle(AbstractXWTComposite.class).loadClass(name);
		}
	};
	XWT.setLoadingContext(lctx);	
	}

	public AbstractXWTComposite(Composite parent, int style) {
		super(parent, style);
		setLayout(new FillLayout());
		loadXWT();
	}

	private void loadXWT() {
		log.info("Rendering composite: "
				+ AbstractXWTComposite.this.getClass().getName());

		URL url = getXWTResourceURL();
		Map<String, Object> options = new HashMap<String, Object>();
		options.put(IXWTLoader.CONTAINER_PROPERTY, AbstractXWTComposite.this);
		options.put(IXWTLoader.CLASS_PROPERTY, AbstractXWTComposite.this);

		try {
			Object root = XWTForms.loadWithOptions(url, options);
			AbstractXWTComposite.this.layout();
		} catch (Exception e) {
			log.error(e.getMessage(), e);
		}
	}

	protected URL getXWTResourceURL() {
		return this.getClass().getResource(
				this.getClass().getSimpleName() + ".xwt");
	}
}