public ScrollBarDecorator(ComponentUI component)
     : base(component)
 {
 }
 /// <summary>
 /// 构造函数.
 /// </summary>
 /// <param name="component"> 注入抽象构件类型的对象 </param>
 public ComponentDecorator(ComponentUI component)
 {
     this.component = component;
 }
 public BlackBorderDecorator(ComponentUI component)
     : base(component)
 {
 }