root/trunk/BuildingApplet.java

import java.util.*;
import java.awt.Graphics;
import javax.swing.*;
import javax.swing.event.*;
import java.awt.geom.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;

public class BuildingApplet extends JApplet {
        JGraphViewer graphViewer;
        Graph graph;
        JButton switchMapButton;

        int sourceFloor, destFloor, currentFloor;

        public void createGui() {

                // loads the graph from the file
                loadGraph();

                String sourceRoomNum = getParameter("source");
                String destRoomNum = getParameter("destination");

                Node sourceN = graph.getNodeByName(sourceRoomNum);
                Node destN = graph.getNodeByName(destRoomNum);
                
                if(sourceN == null || destN == null) {
                        JOptionPane.showMessageDialog(this, "Could not find source " + sourceRoomNum + " or destination " + destRoomNum, "Find@Siebel", JOptionPane.ERROR_MESSAGE);     
                        return;
                }
                
                RoomNode source = (RoomNode)sourceN;
                RoomNode dest = (RoomNode)destN;

                
                
                sourceFloor = source.getFloor();
                destFloor = dest.getFloor();

                currentFloor = sourceFloor;             
                
                AStarSearch userSearch = new AStarSearch();
                userSearch.setOrigin(source);
                userSearch.setDestination(dest);
                Path path = userSearch.computeBestPath();               

                graphViewer = new JGraphViewer(graph, 8, 8, null);
                graphViewer.setBackground(Color.BLACK);
                graphViewer.setDefaultNodePainter(null);
                graphViewer.setDefaultEdgePainter(null);
                graphViewer.setPathNodePainter(new PhysicalNodePainter(Color.BLUE, (float)2.5));
                graphViewer.setPathEdgePainter(new PhysicalEdgePainter(Color.BLUE, 5));

                graphViewer.setPath(path);

                graphViewer.addCustomObjectPainter(source, 0, new PhysicalNodePainter(Color.GREEN, 5));
                graphViewer.addCustomObjectPainter(dest, 0, new PhysicalNodePainter(Color.RED, 5));
                
                graphViewer.setBackgroundMap((BackgroundMap)graph.getBackgroundMaps().get(currentFloor));
                
                getContentPane().add(graphViewer, BorderLayout.CENTER);

                if(sourceFloor != destFloor) {
                        switchMapButton = new JButton("Click here to show destination floor");
                        switchMapButton.addActionListener(new ActionListener() {
                                public void actionPerformed(ActionEvent e) {
                                        switchMap();
                                }
                        });
                        getContentPane().add(switchMapButton, BorderLayout.SOUTH);
                }
                

                graphViewer.setBackground(new Color(0xcbcc99));
        }

        public void start() {
                validate();
                graphViewer.scaleRelative(0.0); 
        }
        
        public void loadGraph() {
                try {
                        System.out.println("getCodeBase: " + getCodeBase().toString());
                        System.out.println("getDocumentBase: " + getDocumentBase().toString());
                
                        
                        graph = Graph.loadFromStream((new URL(getCodeBase().toString() + "siebelmap.dat")).openStream());
                        Iterator i = graph.getBackgroundMaps().iterator();
                        while(i.hasNext()) {
                                ((BuildingMap)i.next()).setRootUri(getCodeBase().toString());
                        }
                } catch(Exception e) {
                        e.printStackTrace();
                }
        }

        public void switchMap() {
                if(currentFloor == sourceFloor) {
                        currentFloor = destFloor;
                        switchMapButton.setText("Click here to show original floor.");
                } else {
                        currentFloor = sourceFloor;
                        switchMapButton.setText("Click here to show destination floor.");
                }               
                
                graphViewer.setBackgroundMap((BackgroundMap)graph.getBackgroundMaps().get(currentFloor));
        }

        public void init() {
                try {
                        javax.swing.SwingUtilities.invokeAndWait(new Runnable() {
                        public void run() {
                                createGui();
                                }
                        });
                } catch (Exception e) {
                        e.printStackTrace();
                        System.err.println("createGUI didn't successfully complete");
                }
        }

}