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.BasicStroke; 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 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 org.apache.commons.collections15.functors.ChainedTransformer; import org.apache.commons.collections15.functors.ConstantTransformer; import edu.uci.ics.jung.algorithms.layout.FRLayout; import edu.uci.ics.jung.algorithms.layout.Layout; import edu.uci.ics.jung.graph.Graph; import edu.uci.ics.jung.graph.util.TestGraphs; import edu.uci.ics.jung.visualization.DefaultVisualizationModel; import edu.uci.ics.jung.visualization.GraphZoomScrollPane; import edu.uci.ics.jung.visualization.VisualizationModel; 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.ToStringLabeller; import edu.uci.ics.jung.visualization.renderers.DefaultVertexLabelRenderer; import edu.uci.ics.jung.visualization.renderers.GradientVertexRenderer; import edu.uci.ics.jung.visualization.renderers.VertexLabelAsShapeRenderer; /** * This demo shows how to use the vertex labels themselves as * the vertex shapes. Additionally, it shows html labels * so they are multi-line, and gradient painting of the * vertex labels. * * @author Tom Nelson * */ public class VertexLabelAsShapeDemo extends JApplet { /** * */ private static final long serialVersionUID = 1017336668368978842L; Graph<String, Number> graph; VisualizationViewer<String, Number> vv; Layout<String, Number> layout; /** * create an instance of a simple graph with basic controls */ public VertexLabelAsShapeDemo() { // create a simple graph for the demo graph = TestGraphs.getOneComponentGraph(); layout = new FRLayout<String, Number>(graph); Dimension preferredSize = new Dimension(400, 400); final VisualizationModel<String, Number> visualizationModel = new DefaultVisualizationModel<String, Number>( layout, preferredSize); vv = new VisualizationViewer<String, Number>(visualizationModel, preferredSize); // this class will provide both label drawing and vertex shapes VertexLabelAsShapeRenderer<String, Number> vlasr = new VertexLabelAsShapeRenderer<String, Number>( vv.getRenderContext()); // customize the render context vv.getRenderContext().setVertexLabelTransformer( // this chains together Transformers so that the html tags // are prepended to the toString method output new ChainedTransformer<String, String>( new Transformer[] { new ToStringLabeller<String>(), new Transformer<String, String>() { public String transform(String input) { return "<html><center>Vertex<p>" + input; } } })); vv.getRenderContext().setVertexShapeTransformer(vlasr); vv.getRenderContext().setVertexLabelRenderer(new DefaultVertexLabelRenderer(Color.red)); vv.getRenderContext().setEdgeDrawPaintTransformer(new ConstantTransformer(Color.yellow)); vv.getRenderContext().setEdgeStrokeTransformer(new ConstantTransformer(new BasicStroke(2.5f))); // customize the renderer vv.getRenderer() .setVertexRenderer(new GradientVertexRenderer<String, Number>(Color.gray, Color.white, true)); vv.getRenderer().setVertexLabelRenderer(vlasr); vv.setBackground(Color.black); // add a listener for ToolTips vv.setVertexToolTipTransformer(new ToStringLabeller<String>()); final DefaultModalGraphMouse<String, Number> graphMouse = new DefaultModalGraphMouse<String, Number>(); vv.setGraphMouse(graphMouse); vv.addKeyListener(graphMouse.getModeKeyListener()); Container content = getContentPane(); GraphZoomScrollPane gzsp = new GraphZoomScrollPane(vv); content.add(gzsp); JComboBox modeBox = graphMouse.getModeComboBox(); modeBox.addItemListener(graphMouse.getModeListener()); graphMouse.setMode(ModalGraphMouse.Mode.TRANSFORMING); 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()); } }); JPanel controls = new JPanel(); JPanel zoomControls = new JPanel(new GridLayout(2, 1)); zoomControls.setBorder(BorderFactory.createTitledBorder("Zoom")); zoomControls.add(plus); zoomControls.add(minus); controls.add(zoomControls); controls.add(modeBox); content.add(controls, BorderLayout.SOUTH); } /** * a driver for this demo */ public static void main(String[] args) { JFrame f = new JFrame(); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.getContentPane().add(new VertexLabelAsShapeDemo()); f.pack(); f.setVisible(true); } }