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 com.google.code.facebook.graph.sna.applet; import java.awt.BorderLayout; import java.awt.Color; import java.awt.Container; import java.awt.Dimension; import java.awt.GridLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.net.URL; 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 org.apache.commons.collections15.Transformer; import edu.uci.ics.jung.algorithms.layout.FRLayout; import edu.uci.ics.jung.graph.DirectedGraph; import edu.uci.ics.jung.graph.DirectedSparseMultigraph; 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.ScalingControl; import edu.uci.ics.jung.visualization.decorators.PickableEdgePaintTransformer; import edu.uci.ics.jung.visualization.decorators.ToStringLabeller; import edu.uci.ics.jung.visualization.renderers.DefaultEdgeLabelRenderer; import edu.uci.ics.jung.visualization.renderers.DefaultVertexLabelRenderer; /** * Demonstrates the use of images on graph edge labels. * * @author Tom Nelson * */ public class ImageEdgeLabelDemo extends JApplet { /** * */ private static final long serialVersionUID = -4332663871914930864L; private static final int VERTEX_COUNT = 11; /** * the graph */ DirectedGraph<Number, Number> graph; /** * the visual component and renderer for the graph */ VisualizationViewer<Number, Number> vv; public ImageEdgeLabelDemo() { // create a simple graph for the demo graph = new DirectedSparseMultigraph<Number, Number>(); createGraph(VERTEX_COUNT); FRLayout<Number, Number> layout = new FRLayout<Number, Number>(graph); layout.setMaxIterations(100); vv = new VisualizationViewer<Number, Number>(layout, new Dimension(400, 400)); vv.getRenderContext().setEdgeDrawPaintTransformer( new PickableEdgePaintTransformer<Number>(vv.getPickedEdgeState(), Color.black, Color.cyan)); vv.setBackground(Color.white); vv.getRenderContext().setVertexLabelRenderer(new DefaultVertexLabelRenderer(Color.cyan)); vv.getRenderContext().setEdgeLabelRenderer(new DefaultEdgeLabelRenderer(Color.cyan)); vv.getRenderContext().setEdgeLabelTransformer(new Transformer<Number, String>() { URL url = getClass().getResource("/images/lightning-s.gif"); public String transform(Number input) { return "<html><img src=" + url + " height=10 width=21>"; } }); // add a listener for ToolTips vv.setVertexToolTipTransformer(new ToStringLabeller<Number>()); vv.setEdgeToolTipTransformer(new ToStringLabeller<Number>()); Container content = getContentPane(); final GraphZoomScrollPane panel = new GraphZoomScrollPane(vv); content.add(panel); final DefaultModalGraphMouse<Number, Number> graphMouse = new DefaultModalGraphMouse<Number, Number>(); vv.setGraphMouse(graphMouse); vv.addKeyListener(graphMouse.getModeKeyListener()); 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()); } }); JComboBox modeBox = graphMouse.getModeComboBox(); JPanel modePanel = new JPanel(); modePanel.setBorder(BorderFactory.createTitledBorder("Mouse Mode")); modePanel.add(modeBox); 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(scaleGrid); controls.add(modePanel); content.add(controls, BorderLayout.SOUTH); } /** * create some vertices * @param count how many to create * @return the Vertices in an array */ private void createGraph(int vertexCount) { for (int i = 0; i < vertexCount; i++) { graph.addVertex(i); } int j = 0; graph.addEdge(j++, 0, 1, EdgeType.DIRECTED); graph.addEdge(j++, 3, 0, EdgeType.DIRECTED); graph.addEdge(j++, 0, 4, EdgeType.DIRECTED); graph.addEdge(j++, 4, 5, EdgeType.DIRECTED); graph.addEdge(j++, 5, 3, EdgeType.DIRECTED); graph.addEdge(j++, 2, 1, EdgeType.DIRECTED); graph.addEdge(j++, 4, 1, EdgeType.DIRECTED); graph.addEdge(j++, 8, 2, EdgeType.DIRECTED); graph.addEdge(j++, 3, 8, EdgeType.DIRECTED); graph.addEdge(j++, 6, 7, EdgeType.DIRECTED); graph.addEdge(j++, 7, 5, EdgeType.DIRECTED); graph.addEdge(j++, 0, 9, EdgeType.DIRECTED); graph.addEdge(j++, 9, 8, EdgeType.DIRECTED); graph.addEdge(j++, 7, 6, EdgeType.DIRECTED); graph.addEdge(j++, 6, 5, EdgeType.DIRECTED); graph.addEdge(j++, 4, 2, EdgeType.DIRECTED); graph.addEdge(j++, 5, 4, EdgeType.DIRECTED); graph.addEdge(j++, 4, 10, EdgeType.DIRECTED); graph.addEdge(j++, 10, 4, EdgeType.DIRECTED); } /** * 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 ImageEdgeLabelDemo()); frame.pack(); frame.setVisible(true); } }