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. * */ 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.awt.event.ItemEvent; import java.awt.event.ItemListener; import javax.swing.AbstractButton; import javax.swing.BorderFactory; import javax.swing.BoundedRangeModel; import javax.swing.Box; import javax.swing.ButtonGroup; import javax.swing.DefaultBoundedRangeModel; import javax.swing.JApplet; import javax.swing.JButton; import javax.swing.JCheckBox; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JRadioButton; import javax.swing.JSlider; import javax.swing.event.ChangeEvent; import javax.swing.event.ChangeListener; import org.apache.commons.collections15.Transformer; import edu.uci.ics.jung.algorithms.layout.CircleLayout; import edu.uci.ics.jung.algorithms.layout.Layout; import edu.uci.ics.jung.graph.Graph; import edu.uci.ics.jung.graph.SparseMultigraph; 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.AbstractEdgeShapeTransformer; import edu.uci.ics.jung.visualization.decorators.ConstantDirectionalEdgeValueTransformer; import edu.uci.ics.jung.visualization.decorators.EdgeShape; 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.renderers.EdgeLabelRenderer; import edu.uci.ics.jung.visualization.renderers.VertexLabelRenderer; /** * Demonstrates jung support for drawing edge labels that * can be positioned at any point along the edge, and can * be rotated to be parallel with the edge. * * @author Tom Nelson * */ public class EdgeLabelDemo extends JApplet { /** * */ private static final long serialVersionUID = -6077157664507049647L; /** * the graph */ Graph<Integer, Number> graph; /** * the visual component and renderer for the graph */ VisualizationViewer<Integer, Number> vv; /** */ VertexLabelRenderer vertexLabelRenderer; EdgeLabelRenderer edgeLabelRenderer; ScalingControl scaler = new CrossoverScalingControl(); /** * create an instance of a simple graph with controls to * demo the label positioning features * */ @SuppressWarnings("serial") public EdgeLabelDemo() { // create a simple graph for the demo graph = new SparseMultigraph<Integer, Number>(); Integer[] v = createVertices(3); createEdges(v); Layout<Integer, Number> layout = new CircleLayout<Integer, Number>(graph); vv = new VisualizationViewer<Integer, Number>(layout, new Dimension(600, 400)); vv.setBackground(Color.white); vertexLabelRenderer = vv.getRenderContext().getVertexLabelRenderer(); edgeLabelRenderer = vv.getRenderContext().getEdgeLabelRenderer(); Transformer<Number, String> stringer = new Transformer<Number, String>() { public String transform(Number e) { return "Edge:" + graph.getEndpoints(e).toString(); } }; vv.getRenderContext().setEdgeLabelTransformer(stringer); vv.getRenderContext().setEdgeDrawPaintTransformer( new PickableEdgePaintTransformer<Number>(vv.getPickedEdgeState(), Color.black, Color.cyan)); vv.getRenderContext().setVertexFillPaintTransformer( new PickableVertexPaintTransformer<Integer>(vv.getPickedVertexState(), Color.red, Color.yellow)); // add my listener for ToolTips vv.setVertexToolTipTransformer(new ToStringLabeller<Integer>()); // create a frome to hold the graph final GraphZoomScrollPane panel = new GraphZoomScrollPane(vv); Container content = getContentPane(); content.add(panel); final DefaultModalGraphMouse<Integer, Number> graphMouse = new DefaultModalGraphMouse<Integer, Number>(); vv.setGraphMouse(graphMouse); 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()); } }); ButtonGroup radio = new ButtonGroup(); JRadioButton lineButton = new JRadioButton("Line"); lineButton.addItemListener(new ItemListener() { public void itemStateChanged(ItemEvent e) { if (e.getStateChange() == ItemEvent.SELECTED) { vv.getRenderContext().setEdgeShapeTransformer(new EdgeShape.Line<Integer, Number>()); vv.repaint(); } } }); JRadioButton quadButton = new JRadioButton("QuadCurve"); quadButton.addItemListener(new ItemListener() { public void itemStateChanged(ItemEvent e) { if (e.getStateChange() == ItemEvent.SELECTED) { vv.getRenderContext().setEdgeShapeTransformer(new EdgeShape.QuadCurve<Integer, Number>()); vv.repaint(); } } }); JRadioButton cubicButton = new JRadioButton("CubicCurve"); cubicButton.addItemListener(new ItemListener() { public void itemStateChanged(ItemEvent e) { if (e.getStateChange() == ItemEvent.SELECTED) { vv.getRenderContext().setEdgeShapeTransformer(new EdgeShape.CubicCurve<Integer, Number>()); vv.repaint(); } } }); radio.add(lineButton); radio.add(quadButton); radio.add(cubicButton); graphMouse.setMode(ModalGraphMouse.Mode.TRANSFORMING); JCheckBox rotate = new JCheckBox("<html><center>EdgeType<p>Parallel</center></html>"); rotate.addItemListener(new ItemListener() { public void itemStateChanged(ItemEvent e) { AbstractButton b = (AbstractButton) e.getSource(); edgeLabelRenderer.setRotateEdgeLabels(b.isSelected()); vv.repaint(); } }); rotate.setSelected(true); MutableDirectionalEdgeValue mv = new MutableDirectionalEdgeValue(.5, .7); vv.getRenderContext().setEdgeLabelClosenessTransformer(mv); JSlider directedSlider = new JSlider(mv.getDirectedModel()) { public Dimension getPreferredSize() { Dimension d = super.getPreferredSize(); d.width /= 2; return d; } }; JSlider undirectedSlider = new JSlider(mv.getUndirectedModel()) { public Dimension getPreferredSize() { Dimension d = super.getPreferredSize(); d.width /= 2; return d; } }; JSlider edgeOffsetSlider = new JSlider(0, 50) { public Dimension getPreferredSize() { Dimension d = super.getPreferredSize(); d.width /= 2; return d; } }; edgeOffsetSlider.addChangeListener(new ChangeListener() { public void stateChanged(ChangeEvent e) { JSlider s = (JSlider) e.getSource(); AbstractEdgeShapeTransformer<Integer, Number> aesf = (AbstractEdgeShapeTransformer<Integer, Number>) vv .getRenderContext().getEdgeShapeTransformer(); aesf.setControlOffsetIncrement(s.getValue()); vv.repaint(); } }); Box controls = Box.createHorizontalBox(); JPanel zoomPanel = new JPanel(new GridLayout(0, 1)); zoomPanel.setBorder(BorderFactory.createTitledBorder("Scale")); zoomPanel.add(plus); zoomPanel.add(minus); JPanel edgePanel = new JPanel(new GridLayout(0, 1)); edgePanel.setBorder(BorderFactory.createTitledBorder("EdgeType Type")); edgePanel.add(lineButton); edgePanel.add(quadButton); edgePanel.add(cubicButton); JPanel rotatePanel = new JPanel(); rotatePanel.setBorder(BorderFactory.createTitledBorder("Alignment")); rotatePanel.add(rotate); JPanel labelPanel = new JPanel(new BorderLayout()); JPanel sliderPanel = new JPanel(new GridLayout(3, 1)); JPanel sliderLabelPanel = new JPanel(new GridLayout(3, 1)); JPanel offsetPanel = new JPanel(new BorderLayout()); offsetPanel.setBorder(BorderFactory.createTitledBorder("Offset")); sliderPanel.add(directedSlider); sliderPanel.add(undirectedSlider); sliderPanel.add(edgeOffsetSlider); sliderLabelPanel.add(new JLabel("Directed", JLabel.RIGHT)); sliderLabelPanel.add(new JLabel("Undirected", JLabel.RIGHT)); sliderLabelPanel.add(new JLabel("Edges", JLabel.RIGHT)); offsetPanel.add(sliderLabelPanel, BorderLayout.WEST); offsetPanel.add(sliderPanel); labelPanel.add(offsetPanel); labelPanel.add(rotatePanel, BorderLayout.WEST); JPanel modePanel = new JPanel(new GridLayout(2, 1)); modePanel.setBorder(BorderFactory.createTitledBorder("Mouse Mode")); modePanel.add(graphMouse.getModeComboBox()); controls.add(zoomPanel); controls.add(edgePanel); controls.add(labelPanel); controls.add(modePanel); content.add(controls, BorderLayout.SOUTH); quadButton.setSelected(true); } /** * subclassed to hold two BoundedRangeModel instances that * are used by JSliders to move the edge label positions * @author Tom Nelson * * */ class MutableDirectionalEdgeValue extends ConstantDirectionalEdgeValueTransformer<Integer, Number> { BoundedRangeModel undirectedModel = new DefaultBoundedRangeModel(5, 0, 0, 10); BoundedRangeModel directedModel = new DefaultBoundedRangeModel(7, 0, 0, 10); public MutableDirectionalEdgeValue(double undirected, double directed) { super(undirected, directed); undirectedModel.setValue((int) (undirected * 10)); directedModel.setValue((int) (directed * 10)); undirectedModel.addChangeListener(new ChangeListener() { public void stateChanged(ChangeEvent e) { setUndirectedValue(new Double(undirectedModel.getValue() / 10f)); vv.repaint(); } }); directedModel.addChangeListener(new ChangeListener() { public void stateChanged(ChangeEvent e) { setDirectedValue(new Double(directedModel.getValue() / 10f)); vv.repaint(); } }); } /** * @return Returns the directedModel. */ public BoundedRangeModel getDirectedModel() { return directedModel; } /** * @return Returns the undirectedModel. */ public BoundedRangeModel getUndirectedModel() { return undirectedModel; } } /** * 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[1], EdgeType.DIRECTED); graph.addEdge(new Double(Math.random()), v[0], v[1], EdgeType.DIRECTED); graph.addEdge(new Double(Math.random()), v[1], v[0], EdgeType.DIRECTED); graph.addEdge(new Double(Math.random()), v[1], v[0], EdgeType.DIRECTED); graph.addEdge(new Double(Math.random()), v[1], v[2]); graph.addEdge(new Double(Math.random()), v[1], v[2]); } /** * a driver for this demo */ public static void main(String[] args) { JFrame frame = new JFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); Container content = frame.getContentPane(); content.add(new EdgeLabelDemo()); frame.pack(); frame.setVisible(true); } }