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.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.ItemEvent; import java.awt.event.ItemListener; import java.util.HashMap; import java.util.Map; import javax.swing.Icon; import javax.swing.ImageIcon; import javax.swing.JButton; import javax.swing.JCheckBox; import javax.swing.JFrame; import javax.swing.JPanel; import org.apache.commons.collections15.Transformer; import edu.uci.ics.jung.algorithms.layout.FRLayout; import edu.uci.ics.jung.graph.DirectedSparseGraph; import edu.uci.ics.jung.graph.Graph; import edu.uci.ics.jung.graph.util.EdgeType; import edu.uci.ics.jung.visualization.GraphZoomScrollPane; 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.ScalingControl; import edu.uci.ics.jung.visualization.decorators.DefaultVertexIconTransformer; import edu.uci.ics.jung.visualization.decorators.EllipseVertexShapeTransformer; import edu.uci.ics.jung.visualization.decorators.PickableEdgePaintTransformer; import edu.uci.ics.jung.visualization.decorators.PickableVertexPaintTransformer; import edu.uci.ics.jung.visualization.decorators.ToStringLabeller; import edu.uci.ics.jung.visualization.decorators.VertexIconShapeTransformer; import edu.uci.ics.jung.visualization.renderers.DefaultEdgeLabelRenderer; import edu.uci.ics.jung.visualization.renderers.DefaultVertexLabelRenderer; /** * A demo that shows flag images as vertices, and uses unicode * to render vertex labels. * * @author Tom Nelson * */ public class UnicodeLabelDemo { /** * the graph */ Graph<Integer, Number> graph; /** * the visual component and renderer for the graph */ VisualizationViewer<Integer, Number> vv; boolean showLabels; @SuppressWarnings("unchecked") public UnicodeLabelDemo() { // create a simple graph for the demo graph = new DirectedSparseGraph<Integer, Number>(); Integer[] v = createVertices(10); createEdges(v); vv = new VisualizationViewer<Integer, Number>(new FRLayout<Integer, Number>(graph)); vv.getRenderContext().setVertexLabelTransformer(new UnicodeVertexStringer<Integer>(v)); vv.getRenderContext().setVertexLabelRenderer(new DefaultVertexLabelRenderer(Color.cyan)); vv.getRenderContext().setEdgeLabelRenderer(new DefaultEdgeLabelRenderer(Color.cyan)); VertexIconShapeTransformer<Integer> vertexIconShapeFunction = new VertexIconShapeTransformer<Integer>( new EllipseVertexShapeTransformer<Integer>()); DefaultVertexIconTransformer<Integer> vertexIconFunction = new DefaultVertexIconTransformer<Integer>(); vv.getRenderContext().setVertexShapeTransformer(vertexIconShapeFunction); vv.getRenderContext().setVertexIconTransformer(vertexIconFunction); loadImages(v, vertexIconFunction.getIconMap()); vertexIconShapeFunction.setIconMap(vertexIconFunction.getIconMap()); vv.getRenderContext().setVertexFillPaintTransformer( new PickableVertexPaintTransformer<Integer>(vv.getPickedVertexState(), Color.white, Color.yellow)); vv.getRenderContext().setEdgeDrawPaintTransformer( new PickableEdgePaintTransformer<Number>(vv.getPickedEdgeState(), Color.black, Color.lightGray)); vv.setBackground(Color.white); // add my listener for ToolTips vv.setVertexToolTipTransformer(new ToStringLabeller<Integer>()); // create a frome to hold the graph final JFrame frame = new JFrame(); Container content = frame.getContentPane(); final GraphZoomScrollPane panel = new GraphZoomScrollPane(vv); content.add(panel); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); final ModalGraphMouse gm = new DefaultModalGraphMouse<Integer, Number>(); vv.setGraphMouse(gm); final ScalingControl scaler = new CrossoverScalingControl(); 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()); } }); JCheckBox lo = new JCheckBox("Show Labels"); lo.addItemListener(new ItemListener() { public void itemStateChanged(ItemEvent e) { showLabels = e.getStateChange() == ItemEvent.SELECTED; vv.repaint(); } }); lo.setSelected(true); JPanel controls = new JPanel(); controls.add(plus); controls.add(minus); controls.add(lo); controls.add(((DefaultModalGraphMouse<Integer, Number>) gm).getModeComboBox()); content.add(controls, BorderLayout.SOUTH); frame.pack(); frame.setVisible(true); } class UnicodeVertexStringer<V> implements Transformer<V, String> { Map<V, String> map = new HashMap<V, String>(); Map<V, Icon> iconMap = new HashMap<V, Icon>(); String[] labels = { "\u0057\u0065\u006C\u0063\u006F\u006D\u0065\u0020\u0074\u006F\u0020JUNG\u0021", "\u6B22\u8FCE\u4F7F\u7528\u0020\u0020JUNG\u0021", "\u0414\u043E\u0431\u0440\u043E\u0020\u043F\u043E\u0436\u0430\u043B\u043E\u0432\u0430\u0422\u044A\u0020\u0432\u0020JUNG\u0021", "\u0042\u0069\u0065\u006E\u0076\u0065\u006E\u0075\u0065\u0020\u0061\u0075\u0020JUNG\u0021", "\u0057\u0069\u006C\u006B\u006F\u006D\u006D\u0065\u006E\u0020\u007A\u0075\u0020JUNG\u0021", "JUNG\u3078\u3087\u3045\u3053\u305D\u0021", // "\u0053\u00E9\u006A\u0061\u0020\u0042\u0065\u006D\u0076\u0069\u006E\u0064\u006F\u0020JUNG\u0021", "\u0042\u0069\u0065\u006E\u0076\u0065\u006E\u0069\u0064\u0061\u0020\u0061\u0020JUNG\u0021" }; public UnicodeVertexStringer(V[] vertices) { for (int i = 0; i < vertices.length; i++) { map.put(vertices[i], labels[i % labels.length]); } } /** * @see edu.uci.ics.jung.graph.decorators.VertexStringer#getLabel(edu.uci.ics.jung.graph.Vertex) */ public String getLabel(V v) { if (showLabels) { return (String) map.get(v); } else { return ""; } } public String transform(V input) { return getLabel(input); } } /** * create some vertices * @param count how many to create * @return the Vertices in an array */ private Integer[] createVertices(int count) { Integer[] v = new Integer[count]; for (int i = 0; i < count; i++) { v[i] = new Integer(i); graph.addVertex(v[i]); } return v; } /** * create edges for this demo graph * @param v an array of Vertices to connect */ void createEdges(Integer[] v) { graph.addEdge(new Double(Math.random()), v[0], v[1], EdgeType.DIRECTED); graph.addEdge(new Double(Math.random()), v[0], v[3], EdgeType.DIRECTED); graph.addEdge(new Double(Math.random()), v[0], v[4], EdgeType.DIRECTED); graph.addEdge(new Double(Math.random()), v[4], v[5], EdgeType.DIRECTED); graph.addEdge(new Double(Math.random()), v[3], v[5], EdgeType.DIRECTED); graph.addEdge(new Double(Math.random()), v[1], v[2], EdgeType.DIRECTED); graph.addEdge(new Double(Math.random()), v[1], v[4], EdgeType.DIRECTED); graph.addEdge(new Double(Math.random()), v[8], v[2], EdgeType.DIRECTED); graph.addEdge(new Double(Math.random()), v[3], v[8], EdgeType.DIRECTED); graph.addEdge(new Double(Math.random()), v[6], v[7], EdgeType.DIRECTED); graph.addEdge(new Double(Math.random()), v[7], v[5], EdgeType.DIRECTED); graph.addEdge(new Double(Math.random()), v[0], v[9], EdgeType.DIRECTED); graph.addEdge(new Double(Math.random()), v[9], v[8], EdgeType.DIRECTED); graph.addEdge(new Double(Math.random()), v[7], v[6], EdgeType.DIRECTED); graph.addEdge(new Double(Math.random()), v[6], v[5], EdgeType.DIRECTED); graph.addEdge(new Double(Math.random()), v[4], v[2], EdgeType.DIRECTED); graph.addEdge(new Double(Math.random()), v[5], v[4], EdgeType.DIRECTED); } /** * A nested class to demo ToolTips */ protected void loadImages(Integer[] vertices, Map<Integer, Icon> imageMap) { ImageIcon[] icons = null; try { icons = new ImageIcon[] { new ImageIcon(getClass().getResource("/images/united-states.gif")), new ImageIcon(getClass().getResource("/images/china.gif")), new ImageIcon(getClass().getResource("/images/russia.gif")), new ImageIcon(getClass().getResource("/images/france.gif")), new ImageIcon(getClass().getResource("/images/germany.gif")), new ImageIcon(getClass().getResource("/images/japan.gif")), new ImageIcon(getClass().getResource("/images/spain.gif")) }; } catch (Exception ex) { System.err.println("You need flags.jar in your classpath to see the flag icons."); } for (int i = 0; icons != null && i < vertices.length; i++) { imageMap.put(vertices[i], icons[i % icons.length]); } } /** * a driver for this demo */ public static void main(String[] args) { new UnicodeLabelDemo(); } }