public class ToolbarCombo extends ControlContribution
{	
	private Combo combo;
	
	public ToolbarCombo(String str)
	{
		super(str);	
	}
	
	@Override
	protected Control createControl(Composite parent)
	{
		combo = new Combo(parent, SWT.DROP_DOWN);

		combo.add("01/01/2009");
		combo.add("01/02/2009");
		combo.add("01/03/2009");
		combo.add("01/04/2009");
		combo.add("01/05/2009");
		combo.setTextLimit(10);
		combo.select(0);

                .....

		return combo;
	}
	
        // TRY to set the width I want... not working!
	protected int computeWidth(Control control)
        {
		return control.computeSize(500, SWT.DEFAULT, true).x;
	}
}

	
private void initializeToolBar()
{
		IToolBarManager toolbarManager = getViewSite().getActionBars().getToolBarManager();
		ToolbarCombo tc = new ToolbarCombo("dateCombo");
		toolbarManager.add(tc);
}