Draw2d 连线五 Locator 标示

关键字：Draw2d 连线 Locator  ConnectionEndpointLocator

public class HelloWorld2 {
	public static void main(String args[]) {
		Shell shell = new Shell();
		shell.setText("Draw2d Hello World");
		shell.setSize(300, 300);
		shell.open();

		// create content 4 shell.
		createContent4Shell(shell);

		while (!shell.isDisposed ()) {
			if (!Display.getDefault().readAndDispatch ())
				Display.getDefault().sleep ();
		}
	}

	private static void createContent4Shell(Shell shell) {
		Panel rootFigure = new Panel();
		rootFigure.setLayoutManager(new XYLayout());

		IFigure figure1 = new Ellipse();
		Ellipse figure2 = new Ellipse();

		// --------------------------------------------------------
		// add connection
		PolylineConnection connection = new PolylineConnection();
		connection.setSourceAnchor(new ChopboxAnchor(figure1));
		connection.setTargetAnchor(new EllipseAnchor(figure2));

		// --------------------------------------------------------
		// add Decoration to Connection
		connection.setSourceDecoration(new PolygonDecoration());

		// --------------------------------------------------------
		// add Labels to Connection
		ConnectionEndpointLocator Locator1 = new ConnectionEndpointLocator(connection, true);
		Locator1.setVDistance(30);
		connection.add(new Label("1..*"), Locator1);
		
		ConnectionEndpointLocator Locator2 = new ConnectionEndpointLocator(connection, false);
		Locator2.setVDistance(15);
		connection.add(new Label("22..*"), Locator2);

		ConnectionEndpointLocator Locator3 = new ConnectionEndpointLocator(connection,true);
		Locator3.setUDistance(80);
		Locator3.setVDistance(-20);
		connection.add(new Label("3333..*"),Locator3);



		rootFigure.add(figure1,new Rectangle(10,10,60,30));
		rootFigure.add(figure2,new Rectangle(170,170,90,90));
		rootFigure.add(connection);

		LightweightSystem lws = new LightweightSystem(shell);
		lws.setContents(rootFigure);
	}
}
           

ConnectionEndpointLocator在定位时非常的方便。setUDistance表示到图像的距离，setVDistance表示到线的距离。