tim/prune/save/KmlExporter.java

   1 package tim.prune.save;
   2
   3 import java.awt.BorderLayout;
   4 import java.awt.Component;
   5 import java.awt.Dimension;
   6 import java.awt.FlowLayout;
   7 import java.awt.event.ActionEvent;
   8 import java.awt.event.ActionListener;
   9 import java.awt.image.BufferedImage;
  10 import java.io.File;
  11 import java.io.FileOutputStream;
  12 import java.io.IOException;
  13 import java.io.OutputStreamWriter;
  14 import java.io.Writer;
  15 import java.util.Iterator;
  16 import java.util.zip.ZipEntry;
  17 import java.util.zip.ZipOutputStream;
  18
  19 import javax.imageio.ImageIO;
  20 import javax.imageio.ImageWriter;
  21 import javax.swing.Box;
  22 import javax.swing.BoxLayout;
  23 import javax.swing.ImageIcon;
  24 import javax.swing.JButton;
  25 import javax.swing.JCheckBox;
  26 import javax.swing.JDialog;
  27 import javax.swing.JFileChooser;
  28 import javax.swing.JLabel;
  29 import javax.swing.JOptionPane;
  30 import javax.swing.JPanel;
  31 import javax.swing.JProgressBar;
  32 import javax.swing.JTextField;
  33 import javax.swing.SwingConstants;
  34
  35 import tim.prune.App;
  36 import tim.prune.Config;
  37 import tim.prune.GenericFunction;
  38 import tim.prune.I18nManager;
  39 import tim.prune.UpdateMessageBroker;
  40 import tim.prune.data.Altitude;
  41 import tim.prune.data.Coordinate;
  42 import tim.prune.data.DataPoint;
  43 import tim.prune.data.Field;
  44 import tim.prune.data.Track;
  45 import tim.prune.data.TrackInfo;
  46 import tim.prune.gui.ImageUtils;
  47 import tim.prune.load.GenericFileFilter;
  48
  49 /**
  50  * Class to export track information
  51  * into a specified Kml file
  52  */
  53 public class KmlExporter extends GenericFunction implements Runnable
  54 {
  55         private TrackInfo _trackInfo = null;
  56         private Track _track = null;
  57         private JDialog _dialog = null;
  58         private JTextField _descriptionField = null;
  59         private JCheckBox _altitudesCheckbox = null;
  60         private JCheckBox _kmzCheckbox = null;
  61         private JCheckBox _exportImagesCheckbox = null;
  62         private JProgressBar _progressBar = null;
  63         private JFileChooser _fileChooser = null;
  64         private File _exportFile = null;
  65
  66         // Filename of Kml file within zip archive
  67         private static final String KML_FILENAME_IN_KMZ = "doc.kml";
  68         // Width and height of thumbnail images in Kmz
  69         private static final int THUMBNAIL_WIDTH = 240;
  70         private static final int THUMBNAIL_HEIGHT = 180;
  71
  72
  73         /**
  74          * Constructor
  75          * @param inApp app object
  76          */
  77         public KmlExporter(App inApp)
  78         {
  79                 super(inApp);
  80                 _trackInfo = inApp.getTrackInfo();
  81                 _track = _trackInfo.getTrack();
  82         }
  83
  84         /** Get name key */
  85         public String getNameKey() {
  86                 return "function.exportkml";
  87         }
  88
  89         /**
  90          * Show the dialog to select options and export file
  91          */
  92         public void begin()
  93         {
  94                 // Make dialog window including whether to compress to kmz (and include pictures) or not
  95                 if (_dialog == null)
  96                 {
  97                         _dialog = new JDialog(_parentFrame, I18nManager.getText(getNameKey()), true);
  98                         _dialog.setLocationRelativeTo(_parentFrame);
  99                         _dialog.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
 100                         _dialog.getContentPane().add(makeDialogComponents());
 101                         _dialog.pack();
 102                 }
 103                 enableCheckboxes();
 104                 _progressBar.setVisible(false);
 105                 _dialog.setVisible(true);
 106         }
 107
 108
 109         /**
 110          * Create dialog components
 111          * @return Panel containing all gui elements in dialog
 112          */
 113         private Component makeDialogComponents()
 114         {
 115                 JPanel dialogPanel = new JPanel();
 116                 dialogPanel.setLayout(new BorderLayout());
 117                 JPanel mainPanel = new JPanel();
 118                 mainPanel.setLayout(new BoxLayout(mainPanel, BoxLayout.Y_AXIS));
 119                 // Make a central panel with the text box and checkboxes
 120                 JPanel descPanel = new JPanel();
 121                 descPanel.setLayout(new FlowLayout());
 122                 descPanel.add(new JLabel(I18nManager.getText("dialog.exportkml.text")));
 123                 _descriptionField = new JTextField(20);
 124                 descPanel.add(_descriptionField);
 125                 mainPanel.add(descPanel);
 126                 dialogPanel.add(mainPanel, BorderLayout.CENTER);
 127                 // Checkbox for altitude export
 128                 _altitudesCheckbox = new JCheckBox(I18nManager.getText("dialog.exportkml.altitude"));
 129                 _altitudesCheckbox.setHorizontalTextPosition(SwingConstants.LEFT);
 130                 mainPanel.add(_altitudesCheckbox);
 131                 // Checkboxes for kmz export and image export
 132                 _kmzCheckbox = new JCheckBox(I18nManager.getText("dialog.exportkml.kmz"));
 133                 _kmzCheckbox.setHorizontalTextPosition(SwingConstants.LEFT);
 134                 _kmzCheckbox.addActionListener(new ActionListener() {
 135                         public void actionPerformed(ActionEvent e)
 136                         {
 137                                 // enable image checkbox if kmz activated
 138                                 enableCheckboxes();
 139                         }
 140                 });
 141                 mainPanel.add(_kmzCheckbox);
 142                 _exportImagesCheckbox = new JCheckBox(I18nManager.getText("dialog.exportkml.exportimages"));
 143                 _exportImagesCheckbox.setHorizontalTextPosition(SwingConstants.LEFT);
 144                 mainPanel.add(_exportImagesCheckbox);
 145                 mainPanel.add(Box.createVerticalStrut(10));
 146                 _progressBar = new JProgressBar(0, 100);
 147                 _progressBar.setVisible(false);
 148                 mainPanel.add(_progressBar);
 149                 mainPanel.add(Box.createVerticalStrut(10));
 150                 // button panel at bottom
 151                 JPanel buttonPanel = new JPanel();
 152                 buttonPanel.setLayout(new FlowLayout(FlowLayout.RIGHT));
 153                 JButton okButton = new JButton(I18nManager.getText("button.ok"));
 154                 ActionListener okListener = new ActionListener() {
 155                         public void actionPerformed(ActionEvent e)
 156                         {
 157                                 startExport();
 158                         }
 159                 };
 160                 okButton.addActionListener(okListener);
 161                 _descriptionField.addActionListener(okListener);
 162                 buttonPanel.add(okButton);
 163                 JButton cancelButton = new JButton(I18nManager.getText("button.cancel"));
 164                 cancelButton.addActionListener(new ActionListener() {
 165                         public void actionPerformed(ActionEvent e)
 166                         {
 167                                 _dialog.dispose();
 168                         }
 169                 });
 170                 buttonPanel.add(cancelButton);
 171                 dialogPanel.add(buttonPanel, BorderLayout.SOUTH);
 172                 return dialogPanel;
 173         }
 174
 175
 176         /**
 177          * Enable the checkboxes according to data
 178          */
 179         private void enableCheckboxes()
 180         {
 181                 boolean hasAltitudes = _track.hasData(Field.ALTITUDE);
 182                 if (!hasAltitudes) {_altitudesCheckbox.setSelected(false);}
 183                 boolean hasPhotos = _trackInfo.getPhotoList() != null && _trackInfo.getPhotoList().getNumPhotos() > 0;
 184                 _exportImagesCheckbox.setSelected(hasPhotos && _kmzCheckbox.isSelected());
 185                 _exportImagesCheckbox.setEnabled(hasPhotos && _kmzCheckbox.isSelected());
 186         }
 187
 188
 189         /**
 190          * Start the export process based on the input parameters
 191          */
 192         private void startExport()
 193         {
 194                 // OK pressed, so choose output file
 195                 if (_fileChooser == null)
 196                 {
 197                         _fileChooser = new JFileChooser();
 198                         _fileChooser.setDialogType(JFileChooser.SAVE_DIALOG);
 199                         _fileChooser.setFileFilter(new GenericFileFilter("filetype.kmlkmz", new String[] {"kml", "kmz"}));
 200                         // start from directory in config which should be set
 201                         File configDir = Config.getWorkingDirectory();
 202                         if (configDir != null) {_fileChooser.setCurrentDirectory(configDir);}
 203                 }
 204                 String requiredExtension = null, otherExtension = null;
 205                 if (_kmzCheckbox.isSelected())
 206                 {
 207                         requiredExtension = ".kmz"; otherExtension = ".kml";
 208                 }
 209                 else
 210                 {
 211                         requiredExtension = ".kml"; otherExtension = ".kmz";
 212                 }
 213                 _fileChooser.setAcceptAllFileFilterUsed(false);
 214                 // Allow choose again if an existing file is selected
 215                 boolean chooseAgain = false;
 216                 do
 217                 {
 218                         chooseAgain = false;
 219                         if (_fileChooser.showSaveDialog(_parentFrame) == JFileChooser.APPROVE_OPTION)
 220                         {
 221                                 // OK pressed and file chosen
 222                                 File file = _fileChooser.getSelectedFile();
 223                                 if (file.getName().toLowerCase().endsWith(otherExtension))
 224                                 {
 225                                         String path = file.getAbsolutePath();
 226                                         file = new File(path.substring(0, path.length()-otherExtension.length()) + requiredExtension);
 227                                 }
 228                                 else if (!file.getName().toLowerCase().endsWith(requiredExtension))
 229                                 {
 230                                         file = new File(file.getAbsolutePath() + requiredExtension);
 231                                 }
 232                                 // Check if file exists and if necessary prompt for overwrite
 233                                 Object[] buttonTexts = {I18nManager.getText("button.overwrite"), I18nManager.getText("button.cancel")};
 234                                 if (!file.exists() || JOptionPane.showOptionDialog(_parentFrame,
 235                                                 I18nManager.getText("dialog.save.overwrite.text"),
 236                                                 I18nManager.getText("dialog.save.overwrite.title"), JOptionPane.YES_NO_OPTION,
 237                                                 JOptionPane.WARNING_MESSAGE, null, buttonTexts, buttonTexts[1])
 238                                         == JOptionPane.YES_OPTION)
 239                                 {
 240                                         // New file or overwrite confirmed, so initiate export in separate thread
 241                                         _exportFile = file;
 242                                         new Thread(this).start();
 243                                 }
 244                                 else
 245                                 {
 246                                         chooseAgain = true;
 247                                 }
 248                         }
 249                 } while (chooseAgain);
 250         }
 251
 252
 253         /**
 254          * Run method for controlling separate thread for exporting
 255          */
 256         public void run()
 257         {
 258                 // Initialise progress bar
 259                 _progressBar.setVisible(true);
 260                 _progressBar.setValue(0);
 261                 boolean exportToKmz = _kmzCheckbox.isSelected();
 262                 boolean exportImages = exportToKmz && _exportImagesCheckbox.isSelected();
 263                 _progressBar.setMaximum(exportImages?getNumPhotosToExport():1);
 264                 OutputStreamWriter writer = null;
 265                 ZipOutputStream zipOutputStream = null;
 266                 try
 267                 {
 268                         // Select writer according to whether kmz requested or not
 269                         if (!_kmzCheckbox.isSelected())
 270                         {
 271                                 // normal writing to file
 272                                 writer = new OutputStreamWriter(new FileOutputStream(_exportFile));
 273                         }
 274                         else
 275                         {
 276                                 // kmz requested - need zip output stream
 277                                 zipOutputStream = new ZipOutputStream(new FileOutputStream(_exportFile));
 278                                 writer = new OutputStreamWriter(zipOutputStream);
 279                                 // Make an entry in the zip file for the kml file
 280                                 ZipEntry kmlEntry = new ZipEntry(KML_FILENAME_IN_KMZ);
 281                                 zipOutputStream.putNextEntry(kmlEntry);
 282                         }
 283                         // write file
 284                         int numPoints = exportData(writer, exportImages);
 285                         // update progress bar
 286                         _progressBar.setValue(1);
 287
 288                         // close zip entry if necessary
 289                         if (zipOutputStream != null)
 290                         {
 291                                 // Make sure all buffered data in writer is flushed
 292                                 writer.flush();
 293                                 // Close off this entry in the zip file
 294                                 zipOutputStream.closeEntry();
 295                                 // Export images into zip file too if requested
 296                                 if (exportImages)
 297                                 {
 298                                         // Create thumbnails of each photo in turn and add to zip as images/image<n>.jpg
 299                                         exportThumbnails(zipOutputStream);
 300                                 }
 301                         }
 302
 303                         // close file
 304                         writer.close();
 305                         // Store directory in config for later
 306                         Config.setWorkingDirectory(_exportFile.getParentFile());
 307                         // show confirmation
 308                         UpdateMessageBroker.informSubscribers(I18nManager.getText("confirm.save.ok1")
 309                                  + " " + numPoints + " " + I18nManager.getText("confirm.save.ok2")
 310                                  + " " + _exportFile.getAbsolutePath());
 311                         // export successful so need to close dialog and return
 312                         _dialog.dispose();
 313                         return;
 314                 }
 315                 catch (IOException ioe)
 316                 {
 317                         // System.out.println("Exception: " + ioe.getClass().getName() + " - " + ioe.getMessage());
 318                         try {
 319                                 if (writer != null) writer.close();
 320                         }
 321                         catch (IOException ioe2) {}
 322                         JOptionPane.showMessageDialog(_parentFrame,
 323                                 I18nManager.getText("error.save.failed") + " : " + ioe.getMessage(),
 324                                 I18nManager.getText("error.save.dialogtitle"), JOptionPane.ERROR_MESSAGE);
 325                 }
 326                 // if not returned already, export failed so need to recall the file selection
 327                 startExport();
 328         }
 329
 330
 331         /**
 332          * Export the information to the given writer
 333          * @param inWriter writer object
 334          * @param inExportImages true if image thumbnails are to be referenced
 335          * @return number of points written
 336          */
 337         private int exportData(OutputStreamWriter inWriter, boolean inExportImages)
 338         throws IOException
 339         {
 340                 inWriter.write("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<kml xmlns=\"http://earth.google.com/kml/2.1\">\n<Folder>\n");
 341                 inWriter.write("\t<name>");
 342                 if (_descriptionField != null && _descriptionField.getText() != null && !_descriptionField.getText().equals(""))
 343                 {
 344                         inWriter.write(_descriptionField.getText());
 345                 }
 346                 else
 347                 {
 348                         inWriter.write("Export from Prune");
 349                 }
 350                 inWriter.write("</name>\n");
 351
 352                 boolean exportAltitudes = _altitudesCheckbox.isSelected();
 353                 int i = 0;
 354                 DataPoint point = null;
 355                 boolean hasTrackpoints = false;
 356                 // Loop over waypoints
 357                 boolean writtenPhotoHeader = false;
 358                 int numPoints = _track.getNumPoints();
 359                 int photoNum = 0;
 360                 for (i=0; i<numPoints; i++)
 361                 {
 362                         point = _track.getPoint(i);
 363                         // Make a blob for each waypoint
 364                         if (point.isWaypoint())
 365                         {
 366                                 exportWaypoint(point, inWriter, exportAltitudes);
 367                         }
 368                         else if (point.getPhoto() == null)
 369                         {
 370                                 hasTrackpoints = true;
 371                         }
 372                         // Make a blob with description for each photo
 373                         if (point.getPhoto() != null)
 374                         {
 375                                 if (!writtenPhotoHeader)
 376                                 {
 377                                         inWriter.write("<Style id=\"camera_icon\"><IconStyle><Icon><href>http://maps.google.com/mapfiles/kml/pal4/icon46.png</href></Icon></IconStyle></Style>");
 378                                         writtenPhotoHeader = true;
 379                                 }
 380                                 photoNum++;
 381                                 exportPhotoPoint(point, inWriter, inExportImages, photoNum, exportAltitudes);
 382                         }
 383                 }
 384                 // Make a line for the track, if there is one
 385                 if (hasTrackpoints)
 386                 {
 387                         // Set up strings for start and end of track segment
 388                         String trackStart = "\t<Placemark>\n\t\t<name>track</name>\n\t\t<Style>\n\t\t\t<LineStyle>\n"
 389                                 + "\t\t\t\t<color>cc0000cc</color>\n\t\t\t\t<width>4</width>\n\t\t\t</LineStyle>\n"
 390                                 + "\t\t\t<PolyStyle><color>33cc0000</color></PolyStyle>\n"
 391                                 + "\t\t</Style>\n\t\t<LineString>\n";
 392                         if (exportAltitudes) {
 393                                 trackStart += "\t\t\t<extrude>1</extrude>\n\t\t\t<altitudeMode>absolute</altitudeMode>\n";
 394                         }
 395                         trackStart += "\t\t\t<coordinates>";
 396                         String trackEnd = "\t\t\t</coordinates>\n\t\t</LineString>\n\t</Placemark>";
 397
 398                         // Start segment
 399                         inWriter.write(trackStart);
 400                         // Loop over track points
 401                         boolean firstTrackpoint = true;
 402                         for (i=0; i<numPoints; i++)
 403                         {
 404                                 point = _track.getPoint(i);
 405                                 // start new track segment if necessary
 406                                 if (point.getSegmentStart() && !firstTrackpoint) {
 407                                         inWriter.write(trackEnd);
 408                                         inWriter.write(trackStart);
 409                                 }
 410                                 if (!point.isWaypoint() && point.getPhoto() == null)
 411                                 {
 412                                         exportTrackpoint(point, inWriter, exportAltitudes);
 413                                         firstTrackpoint = false;
 414                                 }
 415                         }
 416                         // end segment
 417                         inWriter.write(trackEnd);
 418                 }
 419                 inWriter.write("</Folder>\n</kml>");
 420                 return numPoints;
 421         }
 422
 423
 424         /**
 425          * Export the specified waypoint into the file
 426          * @param inPoint waypoint to export
 427          * @param inWriter writer object
 428          * @param inExportAltitude true to include altitude
 429          * @throws IOException on write failure
 430          */
 431         private void exportWaypoint(DataPoint inPoint, Writer inWriter, boolean inExportAltitude) throws IOException
 432         {
 433                 inWriter.write("\t<Placemark>\n\t\t<name>");
 434                 inWriter.write(inPoint.getWaypointName().trim());
 435                 inWriter.write("</name>\n");
 436                 inWriter.write("\t\t<Point>\n");
 437                 if (inExportAltitude && inPoint.hasAltitude()) {
 438                         inWriter.write("\t\t\t<altitudeMode>absolute</altitudeMode>\n");
 439                 }
 440                 inWriter.write("\t\t\t<coordinates>");
 441                 inWriter.write(inPoint.getLongitude().output(Coordinate.FORMAT_DECIMAL_FORCE_POINT));
 442                 inWriter.write(',');
 443                 inWriter.write(inPoint.getLatitude().output(Coordinate.FORMAT_DECIMAL_FORCE_POINT));
 444                 inWriter.write(",");
 445                 if (inExportAltitude && inPoint.hasAltitude()) {
 446                         inWriter.write("" + inPoint.getAltitude().getStringValue(Altitude.Format.METRES));
 447                 }
 448                 else {
 449                         inWriter.write("0");
 450                 }
 451                 inWriter.write("</coordinates>\n\t\t</Point>\n\t</Placemark>\n");
 452         }
 453
 454
 455         /**
 456          * Export the specified photo into the file
 457          * @param inPoint data point including photo
 458          * @param inWriter writer object
 459          * @param inImageLink flag to set whether to export image links or not
 460          * @param inImageNumber number of image for filename
 461          * @param inExportAltitude true to include altitude
 462          * @throws IOException on write failure
 463          */
 464         private void exportPhotoPoint(DataPoint inPoint, Writer inWriter, boolean inImageLink,
 465                 int inImageNumber, boolean inExportAltitude)
 466         throws IOException
 467         {
 468                 inWriter.write("\t<Placemark>\n\t\t<name>");
 469                 inWriter.write(inPoint.getPhoto().getFile().getName());
 470                 inWriter.write("</name>\n");
 471                 if (inImageLink)
 472                 {
 473                         // Work out image dimensions of thumbnail
 474                         Dimension picSize = inPoint.getPhoto().getSize();
 475                         Dimension thumbSize = ImageUtils.getThumbnailSize(picSize.width, picSize.height, THUMBNAIL_WIDTH, THUMBNAIL_HEIGHT);
 476                         // Write out some html for the thumbnail images
 477                         inWriter.write("<description><![CDATA[<br/><table border='0'><tr><td><center><img src='images/image"
 478                                 + inImageNumber + ".jpg' width='" + thumbSize.width + "' height='" + thumbSize.height + "'></center></td></tr>"
 479                                 + "<tr><td><center>Caption for the photo</center></td></tr></table>]]></description>");
 480                 }
 481                 inWriter.write("<styleUrl>#camera_icon</styleUrl>\n");
 482                 inWriter.write("\t\t<Point>\n");
 483                 if (inExportAltitude && inPoint.hasAltitude()) {
 484                         inWriter.write("\t\t\t<altitudeMode>absolute</altitudeMode>\n");
 485                 }
 486                 inWriter.write("\t\t\t<coordinates>");
 487                 inWriter.write(inPoint.getLongitude().output(Coordinate.FORMAT_DECIMAL_FORCE_POINT));
 488                 inWriter.write(',');
 489                 inWriter.write(inPoint.getLatitude().output(Coordinate.FORMAT_DECIMAL_FORCE_POINT));
 490                 inWriter.write(",");
 491                 if (inExportAltitude && inPoint.hasAltitude()) {
 492                         inWriter.write("" + inPoint.getAltitude().getStringValue(Altitude.Format.METRES));
 493                 }
 494                 else {
 495                         inWriter.write("0");
 496                 }
 497                 inWriter.write("</coordinates>\n\t\t</Point>\n\t</Placemark>\n");
 498         }
 499
 500
 501         /**
 502          * Export the specified trackpoint into the file
 503          * @param inPoint trackpoint to export
 504          * @param inWriter writer object
 505          * @param inExportAltitude true to include altitude
 506          */
 507         private void exportTrackpoint(DataPoint inPoint, Writer inWriter, boolean inExportAltitude) throws IOException
 508         {
 509                 inWriter.write(inPoint.getLongitude().output(Coordinate.FORMAT_DECIMAL_FORCE_POINT));
 510                 inWriter.write(',');
 511                 inWriter.write(inPoint.getLatitude().output(Coordinate.FORMAT_DECIMAL_FORCE_POINT));
 512                 // Altitude either absolute or locked to ground by Google Earth
 513                 inWriter.write(",");
 514                 if (inExportAltitude && inPoint.hasAltitude()) {
 515                         inWriter.write("" + inPoint.getAltitude().getStringValue(Altitude.Format.METRES));
 516                 }
 517                 else {
 518                         inWriter.write("0");
 519                 }
 520                 inWriter.write("\n");
 521         }
 522
 523
 524         /**
 525          * Loop through the photos and create thumbnails
 526          * @param inZipStream zip stream to save image files to
 527          */
 528         private void exportThumbnails(ZipOutputStream inZipStream) throws IOException
 529         {
 530                 // set up image writer
 531                 Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName("jpg");
 532                 if (writers == null || !writers.hasNext())
 533                 {
 534                         throw new IOException("no JPEG writer found");
 535                 }
 536                 ImageWriter imageWriter = writers.next();
 537
 538                 int numPoints = _track.getNumPoints();
 539                 DataPoint point = null;
 540                 int photoNum = 0;
 541                 // Loop over all points in track
 542                 for (int i=0; i<numPoints; i++)
 543                 {
 544                         point = _track.getPoint(i);
 545                         if (point.getPhoto() != null)
 546                         {
 547                                 photoNum++;
 548                                 // Make a new entry in zip file
 549                                 ZipEntry entry = new ZipEntry("images/image" + photoNum + ".jpg");
 550                                 inZipStream.putNextEntry(entry);
 551                                 // Load image and write to outstream
 552                                 ImageIcon icon = new ImageIcon(point.getPhoto().getFile().getAbsolutePath());
 553
 554                                 // Scale and smooth image to required size
 555                                 Dimension outputSize = ImageUtils.getThumbnailSize(
 556                                         point.getPhoto().getWidth(), point.getPhoto().getHeight(),
 557                                         THUMBNAIL_WIDTH, THUMBNAIL_HEIGHT);
 558                                 BufferedImage bufferedImage = ImageUtils.createScaledImage(icon.getImage(), outputSize.width, outputSize.height);
 559
 560                                 imageWriter.setOutput(ImageIO.createImageOutputStream(inZipStream));
 561                                 imageWriter.write(bufferedImage);
 562                                 // Close zip file entry
 563                                 inZipStream.closeEntry();
 564                                 // Update progress bar
 565                                 _progressBar.setValue(photoNum+1);
 566                         }
 567                 }
 568         }
 569
 570
 571         /**
 572          * @return number of correlated photos in the track
 573          */
 574         private int getNumPhotosToExport()
 575         {
 576                 int numPoints = _track.getNumPoints();
 577                 int numPhotos = 0;
 578                 DataPoint point = null;
 579                 // Loop over all points in track
 580                 for (int i=0; i<numPoints; i++)
 581                 {
 582                         point = _track.getPoint(i);
 583                         if (point.getPhoto() != null)
 584                         {
 585                                 numPhotos++;
 586                         }
 587                 }
 588                 return numPhotos;
 589         }
 590 }