gef开发，为什么自定义的Ifigure后UML图展示不出来?

[jcreatorqijiashe]

拖动出来后是空的？也没报错，什么都显示不出来，大神门帮忙看看 代码哪里有问题？多谢！。我自定义了一个UML的图（参考 http://blog.csdn.net/niujiabinbin/article/details/51302847 里面的UMLClassFigure），每一个NodePart 中

 
public class NodePart extends AbstractGraphicalEditPart implements PropertyChangeListener, NodeEditPart {

 protected IFigure createFigure() {
    	 
        return new NodeFigure();
    }
    protected void refreshVisuals() {
        Node node = (Node) getModel();
        Point loc = node.getLocation();
        Dimension size = new Dimension(150, 40);
        Rectangle rectangle = new Rectangle(loc, size);
        ((NodeFigure) this.getFigure()).setName(((Node) this.getModel()).getName());
        ((GraphicalEditPart) getParent()).setLayoutConstraint(this, getFigure(), rectangle);
    }

NodeFigure中构造函数如下：

 public NodeFigure() {
       
        IWorkbenchPart activePage = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().getActivePart();

        Device d =activePage.getTitleImage().getDevice();
       Figure contents = new Figure();
       XYLayout contentsLayout = new XYLayout();
       contents.setLayoutManager(contentsLayout);

       Font classFont = new Font(null, "Arial", 12, SWT.BOLD);
       Label classLabel1 = new Label("Table", new Image(d,("c:/class_obj.gif")));
       classLabel1.setFont(classFont);

      

      this.classFigure= new UMLClassFigure(classLabel1);
       
       Label attribute1 = new Label("columns: Column[]", new Image(d,("c:/field_private_obj.gif")));
       Label attribute2 = new Label("rows: Row[]", new Image(d,("c:/field_private_obj.gif")));
       Label attribute3 = new Label("columnID: int", new Image(d,("c:/field_private_obj.gif")));
       Label attribute4 = new Label("items: List", new Image(d,("c:/field_private_obj.gif")));

       classFigure.getAttributesCompartment().add(attribute1);
       classFigure.getAttributesCompartment().add(attribute2);
       
       Label method1 = new Label("getColumns(): Column[]", new Image(d,("c:/methpub_obj.gif")));
       Label method2 = new Label("getRows(): Row[]", new Image(d,("c:/methpub_obj.gif")));
       Label method3 = new Label("getColumnID(): int", new Image(d,("c:/methpub_obj.gif")));
       Label method4 = new Label("getItems(): List", new Image(d,("c:/methpub_obj.gif")));

       classFigure.getMethodsCompartment().add(method1);
       classFigure.getMethodsCompartment().add(method2);
       
       contentsLayout.setConstraint(classFigure, new Rectangle(10,10,-1,-1));
     
       contents.add(classFigure);
 
      this.add(contents);

    }

UMLClassFigure.java

public class UMLClassFigure extends Figure {
	  public static Color classColor = new Color(null,255,255,206);
	  private CompartmentFigure attributeFigure = new CompartmentFigure();
	  private CompartmentFigure methodFigure = new CompartmentFigure();
	  public UMLClassFigure(Label name) {
	    ToolbarLayout layout = new ToolbarLayout();
	    setLayoutManager(layout);   
	    setBorder(new LineBorder(ColorConstants.black,1));
	    setBackgroundColor(classColor);
	    setOpaque(true);

	    add(name);  
	    add(attributeFigure);
	    add(methodFigure);
	  }
	  public CompartmentFigure getAttributesCompartment() {
	    return attributeFigure;
	  }
	  public CompartmentFigure getMethodsCompartment() {
	    return methodFigure;
	  }
	
	}

public class CompartmentFigure extends Figure {

	  public CompartmentFigure() {
	    ToolbarLayout layout = new ToolbarLayout();
	    layout.setMinorAlignment(ToolbarLayout.ALIGN_TOPLEFT);
	    layout.setStretchMinorAxis(false);
	    layout.setSpacing(2);
	    setLayoutManager(layout);
	    setBorder(new CompartmentFigureBorder());
	  }

	  public class CompartmentFigureBorder extends AbstractBorder {
	    public Insets getInsets(IFigure figure) {
	      return new Insets(1,0,0,0);
	    }
	    public void paint(IFigure figure, Graphics graphics, Insets insets) {
	      graphics.drawLine(getPaintRectangle(figure, insets).getTopLeft(),
	                        tempRect.getTopRight());
	    }
	  }
	}

[jcreatorqijiashe]

提前！！！！