Java tutorial
package demos; /* * 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.Font; 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.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import org.apache.commons.collections15.functors.ConstantTransformer; import edu.uci.ics.jung.algorithms.layout.KKLayout; import edu.uci.ics.jung.algorithms.layout.Layout; import edu.uci.ics.jung.algorithms.layout.StaticLayout; import edu.uci.ics.jung.algorithms.layout.TreeLayout; import edu.uci.ics.jung.algorithms.shortestpath.MinimumSpanningForest2; import edu.uci.ics.jung.graph.DelegateForest; import edu.uci.ics.jung.graph.DelegateTree; import edu.uci.ics.jung.graph.Forest; 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.ScalingControl; 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.picking.MultiPickedState; import edu.uci.ics.jung.visualization.picking.PickedState; import edu.uci.ics.jung.visualization.renderers.Renderer; import edu.uci.ics.jung.visualization.transform.MutableTransformer; /** * Demonstrates a single graph with 3 layouts in 3 views. The first view is an * undirected graph using KKLayout The second view show a TreeLayout view of a * MinimumSpanningTree of the first graph. The third view shows the complete * graph of the first view, using the layout positions of the * MinimumSpanningTree tree view. * * @author Tom Nelson * */ @SuppressWarnings("serial") public class MinimumSpanningTreeDemo extends JApplet { /** * the graph */ Graph<String, Number> graph; Forest<String, Number> tree; /** * the visual components and renderers for the graph */ VisualizationViewer<String, Number> vv0; VisualizationViewer<String, Number> vv1; VisualizationViewer<String, Number> vv2; // VisualizationViewer<String,Number> vv3; /** * the normal transformer */ MutableTransformer layoutTransformer; Dimension preferredSize = new Dimension(300, 300); Dimension preferredLayoutSize = new Dimension(400, 400); Dimension preferredSizeRect = new Dimension(500, 250); /** * create an instance of a simple graph in two views with controls to demo * the zoom features. * */ public MinimumSpanningTreeDemo() { // create a simple graph for the demo // both models will share one graph graph = TestGraphs.getDemoGraph(); MinimumSpanningForest2<String, Number> prim = new MinimumSpanningForest2<String, Number>(graph, new DelegateForest<String, Number>(), DelegateTree.<String, Number>getFactory(), new ConstantTransformer(1.0)); tree = prim.getForest(); // create two layouts for the one graph, one layout for each model Layout<String, Number> layout0 = new KKLayout<String, Number>(graph); layout0.setSize(preferredLayoutSize); Layout<String, Number> layout1 = new TreeLayout<String, Number>(tree); Layout<String, Number> layout2 = new StaticLayout<String, Number>(graph, layout1); // create the two models, each with a different layout VisualizationModel<String, Number> vm0 = new DefaultVisualizationModel<String, Number>(layout0, preferredSize); VisualizationModel<String, Number> vm1 = new DefaultVisualizationModel<String, Number>(layout1, preferredSizeRect); VisualizationModel<String, Number> vm2 = new DefaultVisualizationModel<String, Number>(layout2, preferredSizeRect); // create the two views, one for each model // they share the same renderer vv0 = new VisualizationViewer<String, Number>(vm0, preferredSize); vv1 = new VisualizationViewer<String, Number>(vm1, preferredSizeRect); vv2 = new VisualizationViewer<String, Number>(vm2, preferredSizeRect); // vv1.setRenderContext(vv2.getRenderContext()); vv1.getRenderContext().setMultiLayerTransformer(vv0.getRenderContext().getMultiLayerTransformer()); vv2.getRenderContext().setMultiLayerTransformer(vv0.getRenderContext().getMultiLayerTransformer()); vv1.getRenderContext().setEdgeShapeTransformer(new EdgeShape.Line()); vv0.addChangeListener(vv1); vv1.addChangeListener(vv2); vv0.getRenderContext().setVertexLabelTransformer(new ToStringLabeller()); vv2.getRenderContext().setVertexLabelTransformer(new ToStringLabeller()); Color back = Color.decode("0xffffbb"); vv0.setBackground(back); vv1.setBackground(back); vv2.setBackground(back); vv0.getRenderer().getVertexLabelRenderer().setPosition(Renderer.VertexLabel.Position.CNTR); vv0.setForeground(Color.darkGray); vv1.getRenderer().getVertexLabelRenderer().setPosition(Renderer.VertexLabel.Position.CNTR); vv1.setForeground(Color.darkGray); vv2.getRenderer().getVertexLabelRenderer().setPosition(Renderer.VertexLabel.Position.CNTR); vv2.setForeground(Color.darkGray); // share one PickedState between the two views PickedState<String> ps = new MultiPickedState<String>(); vv0.setPickedVertexState(ps); vv1.setPickedVertexState(ps); vv2.setPickedVertexState(ps); PickedState<Number> pes = new MultiPickedState<Number>(); vv0.setPickedEdgeState(pes); vv1.setPickedEdgeState(pes); vv2.setPickedEdgeState(pes); // set an edge paint function that will show picking for edges vv0.getRenderContext().setEdgeDrawPaintTransformer( new PickableEdgePaintTransformer<Number>(vv0.getPickedEdgeState(), Color.black, Color.red)); vv0.getRenderContext().setVertexFillPaintTransformer( new PickableVertexPaintTransformer<String>(vv0.getPickedVertexState(), Color.red, Color.yellow)); vv1.getRenderContext().setEdgeDrawPaintTransformer( new PickableEdgePaintTransformer<Number>(vv1.getPickedEdgeState(), Color.black, Color.red)); vv1.getRenderContext().setVertexFillPaintTransformer( new PickableVertexPaintTransformer<String>(vv1.getPickedVertexState(), Color.red, Color.yellow)); // add default listeners for ToolTips vv0.setVertexToolTipTransformer(new ToStringLabeller()); vv1.setVertexToolTipTransformer(new ToStringLabeller()); vv2.setVertexToolTipTransformer(new ToStringLabeller()); vv0.setLayout(new BorderLayout()); vv1.setLayout(new BorderLayout()); vv2.setLayout(new BorderLayout()); Font font = vv0.getFont().deriveFont(Font.BOLD, 16); JLabel vv0Label = new JLabel("<html>Original Graph<p>using KKLayout"); vv0Label.setFont(font); JLabel vv1Label = new JLabel("Minimum Spanning Trees"); vv1Label.setFont(font); JLabel vv2Label = new JLabel("Original Graph using TreeLayout"); vv2Label.setFont(font); JPanel flow0 = new JPanel(); flow0.setOpaque(false); JPanel flow1 = new JPanel(); flow1.setOpaque(false); JPanel flow2 = new JPanel(); flow2.setOpaque(false); flow0.add(vv0Label); flow1.add(vv1Label); flow2.add(vv2Label); vv0.add(flow0, BorderLayout.NORTH); vv1.add(flow1, BorderLayout.NORTH); vv2.add(flow2, BorderLayout.NORTH); // vv2.getRenderContext().setEdgeDrawPaintTransformer(new // Transformer<Number,Paint>() { // // public Paint transform(Number e) { // if(tree.getEdges().contains(e) == false) return Color.lightGray; // return Color.black; // }}); Container content = getContentPane(); JPanel grid = new JPanel(new GridLayout(0, 1)); JPanel panel = new JPanel(new BorderLayout()); panel.add(new GraphZoomScrollPane(vv0), BorderLayout.WEST); grid.add(new GraphZoomScrollPane(vv1)); grid.add(new GraphZoomScrollPane(vv2)); // panel.add(new GraphZoomScrollPane(vv3), BorderLayout.EAST); panel.add(grid); content.add(panel); // create a GraphMouse for each view DefaultModalGraphMouse gm0 = new DefaultModalGraphMouse(); DefaultModalGraphMouse gm1 = new DefaultModalGraphMouse(); DefaultModalGraphMouse gm2 = new DefaultModalGraphMouse(); DefaultModalGraphMouse gm3 = new DefaultModalGraphMouse(); vv0.setGraphMouse(gm0); vv1.setGraphMouse(gm1); vv2.setGraphMouse(gm2); // vv3.setGraphMouse(gm3); // create zoom buttons for scaling the transformer that is // shared between the two models. final ScalingControl scaler = new CrossoverScalingControl(); vv0.scaleToLayout(scaler); vv1.scaleToLayout(scaler); vv2.scaleToLayout(scaler); // vv3.scaleToLayout(scaler); JButton plus = new JButton("+"); plus.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { scaler.scale(vv1, 1.1f, vv1.getCenter()); } }); JButton minus = new JButton("-"); minus.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { scaler.scale(vv1, 1 / 1.1f, vv1.getCenter()); } }); JPanel zoomPanel = new JPanel(new GridLayout(1, 2)); zoomPanel.setBorder(BorderFactory.createTitledBorder("Zoom")); JPanel modePanel = new JPanel(); modePanel.setBorder(BorderFactory.createTitledBorder("Mouse Mode")); gm1.getModeComboBox().addItemListener(gm2.getModeListener()); gm1.getModeComboBox().addItemListener(gm0.getModeListener()); gm1.getModeComboBox().addItemListener(gm3.getModeListener()); modePanel.add(gm1.getModeComboBox()); JPanel controls = new JPanel(); zoomPanel.add(plus); zoomPanel.add(minus); controls.add(zoomPanel); controls.add(modePanel); 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 MinimumSpanningTreeDemo()); f.pack(); f.setVisible(true); } }