Java tutorial
/* * Copyright (c) 2003, the JUNG Project and the Regents of the University of * California All rights reserved. * * This software is open-source under the BSD license; see either "license.txt" * or http://jung.sourceforge.net/license.txt for a description. * */ package edu.uci.ics.jung.samples; import java.awt.BorderLayout; import java.awt.Color; import java.awt.Container; import java.awt.Dimension; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.GridLayout; import java.awt.Shape; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.ItemEvent; import java.awt.event.ItemListener; import java.awt.geom.AffineTransform; import java.awt.geom.Ellipse2D; import java.awt.geom.Point2D; import javax.swing.BorderFactory; import javax.swing.JApplet; import javax.swing.JButton; import javax.swing.JComboBox; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JRadioButton; import javax.swing.JToggleButton; import org.apache.commons.collections15.Factory; import org.apache.commons.collections15.functors.ConstantTransformer; import edu.uci.ics.jung.algorithms.layout.BalloonLayout; import edu.uci.ics.jung.algorithms.layout.TreeLayout; import edu.uci.ics.jung.graph.DirectedGraph; import edu.uci.ics.jung.graph.DirectedSparseMultigraph; import edu.uci.ics.jung.graph.Forest; import edu.uci.ics.jung.graph.DelegateForest; import edu.uci.ics.jung.graph.DelegateTree; import edu.uci.ics.jung.graph.Tree; import edu.uci.ics.jung.visualization.GraphZoomScrollPane; import edu.uci.ics.jung.visualization.Layer; import edu.uci.ics.jung.visualization.VisualizationServer; import edu.uci.ics.jung.visualization.VisualizationViewer; import edu.uci.ics.jung.visualization.control.CrossoverScalingControl; import edu.uci.ics.jung.visualization.control.DefaultModalGraphMouse; import edu.uci.ics.jung.visualization.control.ModalGraphMouse; import edu.uci.ics.jung.visualization.control.ModalLensGraphMouse; import edu.uci.ics.jung.visualization.control.ScalingControl; import edu.uci.ics.jung.visualization.decorators.EdgeShape; import edu.uci.ics.jung.visualization.decorators.ToStringLabeller; import edu.uci.ics.jung.visualization.layout.LayoutTransition; import edu.uci.ics.jung.visualization.transform.LensSupport; import edu.uci.ics.jung.visualization.transform.MutableTransformer; import edu.uci.ics.jung.visualization.transform.MutableTransformerDecorator; import edu.uci.ics.jung.visualization.transform.shape.HyperbolicShapeTransformer; import edu.uci.ics.jung.visualization.transform.shape.ViewLensSupport; import edu.uci.ics.jung.visualization.util.Animator; /** * Demonstrates the visualization of a Tree using TreeLayout * and BalloonLayout. An examiner lens performing a hyperbolic * transformation of the view is also included. * * @author Tom Nelson * */ @SuppressWarnings("serial") public class BalloonLayoutDemo extends JApplet { /** * the graph */ Forest<String, Integer> graph; Factory<DirectedGraph<String, Integer>> graphFactory = new Factory<DirectedGraph<String, Integer>>() { public DirectedGraph<String, Integer> create() { return new DirectedSparseMultigraph<String, Integer>(); } }; Factory<Tree<String, Integer>> treeFactory = new Factory<Tree<String, Integer>>() { public Tree<String, Integer> create() { return new DelegateTree<String, Integer>(graphFactory); } }; Factory<Integer> edgeFactory = new Factory<Integer>() { int i = 0; public Integer create() { return i++; } }; Factory<String> vertexFactory = new Factory<String>() { int i = 0; public String create() { return "V" + i++; } }; /** * the visual component and renderer for the graph */ VisualizationViewer<String, Integer> vv; VisualizationServer.Paintable rings; String root; TreeLayout<String, Integer> layout; BalloonLayout<String, Integer> radialLayout; /** * provides a Hyperbolic lens for the view */ LensSupport hyperbolicViewSupport; @SuppressWarnings({ "unchecked", "rawtypes" }) public BalloonLayoutDemo() { // create a simple graph for the demo graph = new DelegateForest<String, Integer>(); createTree(); layout = new TreeLayout<String, Integer>(graph); radialLayout = new BalloonLayout<String, Integer>(graph); radialLayout.setSize(new Dimension(900, 900)); vv = new VisualizationViewer<String, Integer>(layout, new Dimension(600, 600)); vv.setBackground(Color.white); vv.getRenderContext().setEdgeShapeTransformer(new EdgeShape.Line()); vv.getRenderContext().setVertexLabelTransformer(new ToStringLabeller()); // add a listener for ToolTips vv.setVertexToolTipTransformer(new ToStringLabeller()); vv.getRenderContext().setArrowFillPaintTransformer(new ConstantTransformer(Color.lightGray)); rings = new Rings(radialLayout); Container content = getContentPane(); final GraphZoomScrollPane panel = new GraphZoomScrollPane(vv); content.add(panel); final DefaultModalGraphMouse graphMouse = new DefaultModalGraphMouse(); vv.setGraphMouse(graphMouse); vv.addKeyListener(graphMouse.getModeKeyListener()); hyperbolicViewSupport = new ViewLensSupport<String, Integer>(vv, new HyperbolicShapeTransformer(vv, vv.getRenderContext().getMultiLayerTransformer().getTransformer(Layer.VIEW)), new ModalLensGraphMouse()); graphMouse.addItemListener(hyperbolicViewSupport.getGraphMouse().getModeListener()); JComboBox modeBox = graphMouse.getModeComboBox(); modeBox.addItemListener(graphMouse.getModeListener()); graphMouse.setMode(ModalGraphMouse.Mode.TRANSFORMING); final ScalingControl scaler = new CrossoverScalingControl(); vv.scaleToLayout(scaler); JButton plus = new JButton("+"); plus.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { scaler.scale(vv, 1.1f, vv.getCenter()); } }); JButton minus = new JButton("-"); minus.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { scaler.scale(vv, 1 / 1.1f, vv.getCenter()); } }); JToggleButton radial = new JToggleButton("Balloon"); radial.addItemListener(new ItemListener() { public void itemStateChanged(ItemEvent e) { if (e.getStateChange() == ItemEvent.SELECTED) { LayoutTransition<String, Integer> lt = new LayoutTransition<String, Integer>(vv, layout, radialLayout); Animator animator = new Animator(lt); animator.start(); vv.getRenderContext().getMultiLayerTransformer().getTransformer(Layer.LAYOUT).setToIdentity(); vv.addPreRenderPaintable(rings); } else { LayoutTransition<String, Integer> lt = new LayoutTransition<String, Integer>(vv, radialLayout, layout); Animator animator = new Animator(lt); animator.start(); vv.getRenderContext().getMultiLayerTransformer().getTransformer(Layer.LAYOUT).setToIdentity(); vv.removePreRenderPaintable(rings); } vv.repaint(); } }); final JRadioButton hyperView = new JRadioButton("Hyperbolic View"); hyperView.addItemListener(new ItemListener() { public void itemStateChanged(ItemEvent e) { hyperbolicViewSupport.activate(e.getStateChange() == ItemEvent.SELECTED); } }); JPanel scaleGrid = new JPanel(new GridLayout(1, 0)); scaleGrid.setBorder(BorderFactory.createTitledBorder("Zoom")); JPanel controls = new JPanel(); scaleGrid.add(plus); scaleGrid.add(minus); controls.add(radial); controls.add(scaleGrid); controls.add(modeBox); controls.add(hyperView); content.add(controls, BorderLayout.SOUTH); } class Rings implements VisualizationServer.Paintable { BalloonLayout<String, Integer> layout; public Rings(BalloonLayout<String, Integer> layout) { this.layout = layout; } public void paint(Graphics g) { g.setColor(Color.gray); Graphics2D g2d = (Graphics2D) g; Ellipse2D ellipse = new Ellipse2D.Double(); for (String v : layout.getGraph().getVertices()) { Double radius = layout.getRadii().get(v); if (radius == null) continue; Point2D p = layout.transform(v); ellipse.setFrame(-radius, -radius, 2 * radius, 2 * radius); AffineTransform at = AffineTransform.getTranslateInstance(p.getX(), p.getY()); Shape shape = at.createTransformedShape(ellipse); MutableTransformer viewTransformer = vv.getRenderContext().getMultiLayerTransformer() .getTransformer(Layer.VIEW); if (viewTransformer instanceof MutableTransformerDecorator) { shape = vv.getRenderContext().getMultiLayerTransformer().transform(shape); } else { shape = vv.getRenderContext().getMultiLayerTransformer().transform(Layer.LAYOUT, shape); } g2d.draw(shape); } } public boolean useTransform() { return true; } } /** * */ private void createTree() { graph.addVertex("A0"); graph.addEdge(edgeFactory.create(), "A0", "B0"); graph.addEdge(edgeFactory.create(), "A0", "B1"); graph.addEdge(edgeFactory.create(), "A0", "B2"); graph.addEdge(edgeFactory.create(), "B0", "C0"); graph.addEdge(edgeFactory.create(), "B0", "C1"); graph.addEdge(edgeFactory.create(), "B0", "C2"); graph.addEdge(edgeFactory.create(), "B0", "C3"); graph.addEdge(edgeFactory.create(), "C2", "H0"); graph.addEdge(edgeFactory.create(), "C2", "H1"); graph.addEdge(edgeFactory.create(), "B1", "D0"); graph.addEdge(edgeFactory.create(), "B1", "D1"); graph.addEdge(edgeFactory.create(), "B1", "D2"); graph.addEdge(edgeFactory.create(), "B2", "E0"); graph.addEdge(edgeFactory.create(), "B2", "E1"); graph.addEdge(edgeFactory.create(), "B2", "E2"); graph.addEdge(edgeFactory.create(), "D0", "F0"); graph.addEdge(edgeFactory.create(), "D0", "F1"); graph.addEdge(edgeFactory.create(), "D0", "F2"); graph.addEdge(edgeFactory.create(), "D1", "G0"); graph.addEdge(edgeFactory.create(), "D1", "G1"); graph.addEdge(edgeFactory.create(), "D1", "G2"); graph.addEdge(edgeFactory.create(), "D1", "G3"); graph.addEdge(edgeFactory.create(), "D1", "G4"); graph.addEdge(edgeFactory.create(), "D1", "G5"); graph.addEdge(edgeFactory.create(), "D1", "G6"); graph.addEdge(edgeFactory.create(), "D1", "G7"); // uncomment this to make it a Forest: // graph.addVertex("K0"); // graph.addEdge(edgeFactory.create(), "K0", "K1"); // graph.addEdge(edgeFactory.create(), "K0", "K2"); // graph.addEdge(edgeFactory.create(), "K0", "K3"); // // graph.addVertex("J0"); // graph.addEdge(edgeFactory.create(), "J0", "J1"); // graph.addEdge(edgeFactory.create(), "J0", "J2"); // graph.addEdge(edgeFactory.create(), "J1", "J4"); // graph.addEdge(edgeFactory.create(), "J2", "J3"); //// graph.addEdge(edgeFactory.create(), "J2", "J5"); //// graph.addEdge(edgeFactory.create(), "J4", "J6"); //// graph.addEdge(edgeFactory.create(), "J4", "J7"); //// graph.addEdge(edgeFactory.create(), "J3", "J8"); //// graph.addEdge(edgeFactory.create(), "J6", "B9"); } /** * a driver for this demo */ public static void main(String[] args) { JFrame frame = new JFrame(); Container content = frame.getContentPane(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); content.add(new BalloonLayoutDemo()); frame.pack(); frame.setVisible(true); } }