飞屋。代码更改。

对 http://www.iteye.com/topic/650762 的代码做一些修改。
原来的代码，主要用鼠标，很麻烦。

package house;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;
import java.awt.geom.Point2D;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.Hashtable;
import java.util.List;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.SwingUtilities;
import twaver.Element;
import twaver.Layer;
import twaver.Link;
import twaver.MovableFilter;
import twaver.Node;
import twaver.ResizableNode;
import twaver.TDataBox;
import twaver.TWaverConst;
import twaver.TWaverUtil;
import twaver.network.CanvasCushion;
import twaver.network.TNetwork;

public class MainUI extends JFrame {

    public static final boolean DEBUG = false;
    private Font defaultFont = new Font("微软雅黑", Font.BOLD, 12);
    private TDataBox box = new TDataBox();
    private TNetwork network = new TNetwork(box);
    private Node control = new Node();
    private ResizableNode house = new ResizableNode() {

        @Override
        public void setLocation(Point2D.Double location) {
            super.setLocation(location);
            int altitude = (int) (Ground.getGroundHeight() - (location.y + this.getHeight() / 2));
            this.setName("海拔：" + altitude + "米");
        }
    };
    private JButton btnExit = new JButton("退出程序");
    private JButton btnAdd = new JButton("添加气球");
    private JButton btnCut = new JButton("剪断气球");

    public MainUI() {
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setSize(1000, 850);
        this.setExtendedState(JFrame.MAXIMIZED_BOTH);
        this.setTitle("Java飞屋环游记");
        TWaverUtil.centerWindow(this);
        this.setUndecorated(true);
        this.add(network, BorderLayout.CENTER);

        network.setToolbar(null);
        network.setBorder(null);
        network.getCanvasScrollPane().setBorder(null);
        network.getCanvasScrollPane().setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_NEVER);
        network.getCanvasScrollPane().setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
        final Image background = updateBackground();
        network.addCanvasCushion(new CanvasCushion() {

            public void paint(Graphics2D g) {
                Point pos = getLocationOnScreen();
                Point offset = new Point(-pos.x, -pos.y);
                g.drawImage(background, offset.x, offset.y, null);
            }
        });

        btnExit.setFont(new Font("微软雅黑", Font.BOLD, 12));
        network.getCanvas().add(btnExit);
        btnExit.setBounds(100, 100, 100, 30);
        btnExit.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                System.exit(0);
            }
        });
        this.house.addPropertyChangeListener(new PropertyChangeListener() {

            public void propertyChange(PropertyChangeEvent evt) {
                if (TWaverUtil.getPropertyName(evt).equalsIgnoreCase(TWaverConst.PROPERTYNAME_LOCATION)) {
                    int width = btnExit.getWidth();
                    int height = btnExit.getHeight();
                    //int x = house.getLocation().x + house.getWidth() / 2 - width / 2;
                    //int y = house.getLocation().y + house.getHeight();
                    int x = 950;
                    int y = 800;
                    btnExit.setBounds(x, y, width, height);
                }
            }
        });
        
        btnAdd.setFont(new Font("微软雅黑", Font.BOLD, 12));
        network.getCanvas().add(btnAdd);
        btnAdd.setBounds(100, 100, 100, 30);
        btnAdd.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {
            	addMoreBalloons(1);
            }
        });
        this.house.addPropertyChangeListener(new PropertyChangeListener() {

            public void propertyChange(PropertyChangeEvent evt) {
                if (TWaverUtil.getPropertyName(evt).equalsIgnoreCase(TWaverConst.PROPERTYNAME_LOCATION)) {
                    int width = btnAdd.getWidth();
                    int height = btnAdd.getHeight();
                    //int x = house.getLocation().x + house.getWidth() / 2 - width / 2;
                    //int y = house.getLocation().y + house.getHeight();
                    int x = 950;
                    int y = 700;
                    btnAdd.setBounds(x, y, width, height);
                }
            }
        });

        
        btnCut.setFont(new Font("微软雅黑", Font.BOLD, 12));
        network.getCanvas().add(btnCut);
        btnCut.setBounds(100, 100, 100, 30);
        btnCut.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {
            	List list = box.getAllElements();
            	int size = list.size();
            	for(int i=0; i<size; i++)
            	{
            		if(list.get(i) instanceof BalloonLink)
            		{
            			BalloonLink bl = (BalloonLink)list.get(i);
            			//cutLink(bl, bl.getCenterLocation());
            			//cutLink(bl, bl.getLocation());
            			//cutLink(bl, new Point());
            			cutLink(bl, house.getLocation());
            			//bl.get
            			//bl.getLocation()

            		}
            	}
            	
            }
        });
        this.house.addPropertyChangeListener(new PropertyChangeListener() {

            public void propertyChange(PropertyChangeEvent evt) {
                if (TWaverUtil.getPropertyName(evt).equalsIgnoreCase(TWaverConst.PROPERTYNAME_LOCATION)) {
                    int width = btnCut.getWidth();
                    int height = btnCut.getHeight();
                    //int x = house.getLocation().x + house.getWidth() / 2 - width / 2;
                    //int y = house.getLocation().y + house.getHeight();
                    int x = 950;
                    int y = 750;
                    btnCut.setBounds(x, y, width, height);
                }
            }
        });
        
        

        initComponents();
        createTopo();
        setupLayout();
        startMocker();
    }

    private Image updateBackground() {
        try {
            Robot robot = new Robot();
            Toolkit tk = Toolkit.getDefaultToolkit();
            Dimension dim = tk.getScreenSize();
            Rectangle bounds = new Rectangle(0, 0, (int) dim.getWidth(), (int) dim.getHeight());
            return robot.createScreenCapture(bounds);
        } catch (Exception ex) {
            ex.printStackTrace();
        }
        return null;
    }

    private void addMoreBalloons(int num) {
        for (int i = 0; i < num; i++) {
            Balloon balloon = new Balloon();
            balloon.setLocation(house.getCenterLocation());
            box.addElement(balloon);
            box.addElement(new BalloonLink(house, balloon));
            box.addElement(new InvisibleLink(control, balloon));
            box.moveToUp(house);
        }
    }

    private void initComponents() {
        network.addElementDoubleClickedActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                if (e.getSource() == house) {
                    addMoreBalloons(10);
                }
            }
        });
        network.setToolbar(null);
        network.getCanvas().addMouseMotionListener(new MouseMotionAdapter() {

            private Link lastLink = null;

            @Override
            public void mouseMoved(MouseEvent e) {
                Element element = network.getElementPhysicalAt(e.getPoint());


                if (element instanceof BalloonLink) {
                    if (lastLink != null) {
                        lastLink.putLinkColor(BalloonLink.LINE_COLOR);
                    }
                    lastLink = (Link) element;
                    lastLink.putLinkColor(Color.darkGray);
                } else {
                    if (lastLink != null && element == null) {
                        lastLink.putLinkColor(BalloonLink.LINE_COLOR);
                    }
                }
            }
        });

        network.getCanvas().addMouseListener(new MouseAdapter() {

            @Override
            public void mouseReleased(MouseEvent e) {
                network.getSelectionModel().clearSelection();
            }

            @Override
            public void mousePressed(MouseEvent e) {
                Element element = network.getElementPhysicalAt(e.getPoint());
                if (element instanceof BalloonLink) {
                    final BalloonLink link = (BalloonLink) element;
                    cutLink(link, e.getPoint());
                }
            }
        });
    }

    private void cutLink(final BalloonLink link, Point cutPoint) {
        final Balloon balloon = (Balloon) link.getTo();
        final ResizableNode brokenPoint1 = new ResizableNode();
        final ResizableNode brokenPoint2 = new ResizableNode();

        //create a sky to raise balloon.
        final Sky sky = new Sky();
        sky.setLocation(balloon.getLocation().x, 0);
        box.addElement(sky);

        //remove old balloon link.
        box.removeElement(link);
        //remove old control link.
        box.removeElement((Link) balloon.getAllLinks().iterator().next());

        //add two sky links so balloon raise faster.
        final InvisibleLink skyLink1 = new InvisibleLink(sky, balloon);
        final InvisibleLink skyLink2 = new InvisibleLink(sky, balloon);
        final InvisibleLink skyLink3 = new InvisibleLink(sky, balloon);
        box.addElement(skyLink1);
        box.addElement(skyLink2);
        box.addElement(skyLink3);

        balloon.addPropertyChangeListener(new PropertyChangeListener() {

            public void propertyChange(PropertyChangeEvent evt) {
                String propertyName = TWaverUtil.getPropertyName(evt);
                if (propertyName.equalsIgnoreCase(TWaverConst.PROPERTYNAME_LOCATION)) {
                    if (balloon.getY() < 100) {
                        box.removeElement(balloon);
                        box.removeElement(brokenPoint1);
                        box.removeElement(brokenPoint2);
                        box.removeElement(skyLink1);
                        box.removeElement(skyLink2);
                        box.removeElement(skyLink3);
                        box.removeElement(sky);
                    }
                }
            }
        });

        brokenPoint1.putCustomDraw(true);
        brokenPoint1.setSize(2, 2);
        brokenPoint1.putCustomDrawFill(false);
        brokenPoint1.putCustomDrawOutline(false);
        brokenPoint1.setCenterLocation(cutPoint);
        box.addElement(brokenPoint1);

        BrokenLink brokenLink = new BrokenLink(brokenPoint1, balloon);
        box.addElement(brokenLink);


        brokenPoint2.putCustomDraw(true);
        brokenPoint2.setSize(2, 2);
        brokenPoint2.putCustomDrawFill(false);
        brokenPoint2.putCustomDrawOutline(false);
        brokenPoint2.setCenterLocation(cutPoint);
        box.addElement(brokenPoint2);

        brokenLink = new BrokenLink(house, brokenPoint2);
        box.addElement(brokenLink);
    }

    private void setupLayout() {
        network.getSpringLayouter().setMovableFilter(new MovableFilter() {

            public boolean isMovable(Element element) {
                return element instanceof ResizableNode
                        && !(element instanceof Sky);
            }
        });
        //network.getSpringLayouter().setForceSize(0);
        network.getSpringLayouter().setStepSize(1);
        network.getSpringLayouter().setNodeRepulsionFactor(0.5);
        //network.getSpringLayouter().setLinkRepulsionFactor(1);
        network.getSpringLayouter().start();
    }

    private void createTopo() {
        control.setLocation(800, 10);
        control.setImage("/house/control.gif");
        control.putBorderVisible(false);
        control.setLayerID("control");
        control.setToolTipText("可以拖动我哦！");
        box.addElement(control);

        house.putLabelFont(defaultFont);
        house.putLabelColor(Color.white);
        house.putLabelBackground(TWaverUtil.getRandomAlphaColor());
        house.putLabelPosition(TWaverConst.POSITION_LEFT);
        house.setImage("/house/house.png");
        house.putBorderVisible(false);
        house.putLabelHighlightable(false);
        house.setLocation(500, 500);
        house.setLayerID("houes");
        house.setToolTipText("双击增加气球，还可以拖动房子！");
        box.addElement(house);

        Layer houseLayer = new Layer("house");
        box.getLayerModel().addLayer(houseLayer);
        box.getLayerModel().moveToTop(houseLayer);

        Layer balloonLayer = new Layer("balloon");
        box.getLayerModel().addLayer(balloonLayer);
        box.getLayerModel().moveToBottom(balloonLayer);

        Layer controlLayer = new Layer("control");
        box.getLayerModel().addLayer(controlLayer);
        box.getLayerModel().moveToBottom(controlLayer);

        //install some lines on ground.
        for (int i = 0; i < 100; i++) {
            Ground ground = new Ground();
            ground.setLocation(500, Ground.getGroundHeight());
            box.addElement(ground);
            box.addElement(new InvisibleLink(ground, house));
        }
    }

    private void startMocker() {
        Thread balloonThread = new Thread() {

            @Override
            public void run() {
                try {
                    Thread.sleep(2000);
                    for (int i = 0; i < 10; i++) {
                        Thread.sleep(500);
                        SwingUtilities.invokeLater(new Runnable() {

                            public void run() {
                                addMoreBalloons(10);
                            }
                        });
                    }
                } catch (InterruptedException ex) {
                    ex.printStackTrace();
                }
            }
        };
        balloonThread.start();
        Thread controlThread = new Thread() {

            @Override
            public void run() {
                final Hashtable map = new Hashtable();
                try {
                    while (true) {
                        Thread.sleep(10000);
                        Toolkit tk = Toolkit.getDefaultToolkit();
                        Dimension dim = tk.getScreenSize();
                        int x = TWaverUtil.getRandomInt(dim.width);
                        int y = TWaverUtil.getRandomInt(dim.height);
                        Point point = new Point(x, y);
                        map.put(control, point);
                        SwingUtilities.invokeLater(new Runnable() {

                            public void run() {
                                TWaverUtil.animateCenterLocation(map);
                            }
                        });
                    }
                } catch (InterruptedException ex) {
                    ex.printStackTrace();
                }
            }
        };
        controlThread.start();
    }

    public static void main(String[] args) {
        MainUI ui = new MainUI();
        ui.setVisible(true);
    }
}