]> gitweb.fperrin.net Git - GpsPrune.git/blobdiff - src/tim/prune/save/KmlExporter.java
Moved source into separate src directory due to popular request
[GpsPrune.git] / src / tim / prune / save / KmlExporter.java
diff --git a/src/tim/prune/save/KmlExporter.java b/src/tim/prune/save/KmlExporter.java
new file mode 100644 (file)
index 0000000..9d1c078
--- /dev/null
@@ -0,0 +1,937 @@
+package tim.prune.save;
+
+import java.awt.BorderLayout;
+import java.awt.Color;
+import java.awt.Component;
+import java.awt.Dimension;
+import java.awt.FlowLayout;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.awt.image.BufferedImage;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.OutputStreamWriter;
+import java.io.Writer;
+import java.util.Iterator;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipOutputStream;
+
+import javax.imageio.ImageIO;
+import javax.imageio.ImageWriter;
+import javax.swing.Box;
+import javax.swing.BoxLayout;
+import javax.swing.ButtonGroup;
+import javax.swing.ImageIcon;
+import javax.swing.JButton;
+import javax.swing.JCheckBox;
+import javax.swing.JDialog;
+import javax.swing.JFileChooser;
+import javax.swing.JLabel;
+import javax.swing.JOptionPane;
+import javax.swing.JPanel;
+import javax.swing.JProgressBar;
+import javax.swing.JRadioButton;
+import javax.swing.JTextField;
+import javax.swing.SwingConstants;
+
+import tim.prune.App;
+import tim.prune.GenericFunction;
+import tim.prune.I18nManager;
+import tim.prune.UpdateMessageBroker;
+import tim.prune.config.ColourUtils;
+import tim.prune.config.Config;
+import tim.prune.data.Coordinate;
+import tim.prune.data.DataPoint;
+import tim.prune.data.Field;
+import tim.prune.data.RecentFile;
+import tim.prune.data.Timestamp;
+import tim.prune.data.Track;
+import tim.prune.data.TrackInfo;
+import tim.prune.data.UnitSetLibrary;
+import tim.prune.gui.DialogCloser;
+import tim.prune.gui.ImageUtils;
+import tim.prune.gui.WholeNumberField;
+import tim.prune.gui.colour.ColourChooser;
+import tim.prune.gui.colour.ColourPatch;
+import tim.prune.load.GenericFileFilter;
+import tim.prune.save.xml.XmlUtils;
+
+/**
+ * Class to export track information
+ * into a specified Kml or Kmz file
+ */
+public class KmlExporter extends GenericFunction implements Runnable
+{
+       private TrackInfo _trackInfo = null;
+       private Track _track = null;
+       private JDialog _dialog = null;
+       private JTextField _descriptionField = null;
+       private PointTypeSelector _pointTypeSelector = null;
+       private JRadioButton _gxExtensionsRadio = null;
+       private JCheckBox _altitudesCheckbox = null;
+       private JCheckBox _kmzCheckbox = null;
+       private JCheckBox _exportImagesCheckbox = null;
+       private JLabel _imageSizeLabel = null;
+       private WholeNumberField _imageSizeField = null;
+       private ColourPatch _colourPatch = null;
+       private JLabel _progressLabel = null;
+       private JProgressBar _progressBar = null;
+       private Dimension[] _imageDimensions = null;
+       private JFileChooser _fileChooser = null;
+       private File _exportFile = null;
+       private JButton _okButton = null;
+       private boolean _cancelPressed = false;
+       private ColourChooser _colourChooser = null;
+
+       // Filename of Kml file within zip archive
+       private static final String KML_FILENAME_IN_KMZ = "doc.kml";
+       // Default width and height of thumbnail images in Kmz
+       private static final int DEFAULT_THUMBNAIL_WIDTH = 240;
+       // Default track colour
+       private static final Color DEFAULT_TRACK_COLOUR = new Color(204, 0, 0); // red
+
+
+       /**
+        * Constructor
+        * @param inApp app object
+        */
+       public KmlExporter(App inApp)
+       {
+               super(inApp);
+               _trackInfo = inApp.getTrackInfo();
+               _track = _trackInfo.getTrack();
+       }
+
+       /** Get name key */
+       public String getNameKey() {
+               return "function.exportkml";
+       }
+
+       /**
+        * Show the dialog to select options and export file
+        */
+       public void begin()
+       {
+               // Make dialog window including whether to compress to kmz (and include pictures) or not
+               if (_dialog == null)
+               {
+                       _dialog = new JDialog(_parentFrame, I18nManager.getText(getNameKey()), true);
+                       _dialog.setLocationRelativeTo(_parentFrame);
+                       _dialog.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
+                       _dialog.getContentPane().add(makeDialogComponents());
+                       _dialog.pack();
+                       _colourChooser = new ColourChooser(_dialog);
+               }
+               // Fill in image size from config
+               _imageSizeField.setValue(Config.getConfigInt(Config.KEY_KMZ_IMAGE_SIZE));
+               enableCheckboxes();
+               _descriptionField.setEnabled(true);
+               _okButton.setEnabled(true);
+               _progressLabel.setText("");
+               _progressBar.setVisible(false);
+               _dialog.setVisible(true);
+       }
+
+
+       /**
+        * Create dialog components
+        * @return Panel containing all gui elements in dialog
+        */
+       private Component makeDialogComponents()
+       {
+               JPanel dialogPanel = new JPanel();
+               dialogPanel.setLayout(new BorderLayout(0, 5));
+               JPanel mainPanel = new JPanel();
+               mainPanel.setLayout(new BoxLayout(mainPanel, BoxLayout.Y_AXIS));
+               // Make a central panel with the text box and checkboxes
+               JPanel descPanel = new JPanel();
+               descPanel.setLayout(new FlowLayout());
+               descPanel.add(new JLabel(I18nManager.getText("dialog.exportkml.text")));
+               _descriptionField = new JTextField(20);
+               _descriptionField.addKeyListener(new DialogCloser(_dialog));
+               descPanel.add(_descriptionField);
+               descPanel.setAlignmentX(Component.CENTER_ALIGNMENT);
+               mainPanel.add(descPanel);
+               dialogPanel.add(mainPanel, BorderLayout.CENTER);
+               // point type selection
+               _pointTypeSelector = new PointTypeSelector();
+               _pointTypeSelector.setAlignmentX(Component.CENTER_ALIGNMENT);
+               mainPanel.add(_pointTypeSelector);
+               // Colour definition
+               Color trackColour = ColourUtils.colourFromHex(Config.getConfigString(Config.KEY_KML_TRACK_COLOUR));
+               if (trackColour == null) {
+                       trackColour = DEFAULT_TRACK_COLOUR;
+               }
+               _colourPatch = new ColourPatch(trackColour);
+               _colourPatch.addMouseListener(new MouseAdapter() {
+                       public void mouseClicked(MouseEvent e) {
+                               _colourChooser.showDialog(_colourPatch.getBackground());
+                               Color colour = _colourChooser.getChosenColour();
+                               if (colour != null) _colourPatch.setColour(colour);
+                       }
+               });
+               JPanel colourPanel = new JPanel();
+               colourPanel.add(new JLabel(I18nManager.getText("dialog.exportkml.trackcolour")));
+               colourPanel.add(_colourPatch);
+               mainPanel.add(colourPanel);
+               // Pair of radio buttons for standard/extended KML
+               JRadioButton standardKmlRadio = new JRadioButton(I18nManager.getText("dialog.exportkml.standardkml"));
+               _gxExtensionsRadio = new JRadioButton(I18nManager.getText("dialog.exportkml.extendedkml"));
+               ButtonGroup bGroup = new ButtonGroup();
+               bGroup.add(standardKmlRadio); bGroup.add(_gxExtensionsRadio);
+               JPanel radioPanel = new JPanel();
+               radioPanel.setLayout(new FlowLayout(FlowLayout.CENTER, 10, 1));
+               radioPanel.add(standardKmlRadio);
+               radioPanel.add(_gxExtensionsRadio);
+               standardKmlRadio.setSelected(true);
+               mainPanel.add(radioPanel);
+               // Checkbox for altitude export
+               _altitudesCheckbox = new JCheckBox(I18nManager.getText("dialog.exportkml.altitude"));
+               _altitudesCheckbox.setHorizontalTextPosition(SwingConstants.LEFT);
+               _altitudesCheckbox.setAlignmentX(Component.CENTER_ALIGNMENT);
+               mainPanel.add(_altitudesCheckbox);
+
+               // Checkboxes for kmz export and image export
+               _kmzCheckbox = new JCheckBox(I18nManager.getText("dialog.exportkml.kmz"));
+               _kmzCheckbox.setHorizontalTextPosition(SwingConstants.LEFT);
+               _kmzCheckbox.setAlignmentX(Component.CENTER_ALIGNMENT);
+               // enable image checkbox if kmz activated
+               _kmzCheckbox.addActionListener(new ActionListener() {
+                       public void actionPerformed(ActionEvent e)
+                       {
+                               enableCheckboxes();
+                       }
+               });
+               mainPanel.add(_kmzCheckbox);
+               _exportImagesCheckbox = new JCheckBox(I18nManager.getText("dialog.exportkml.exportimages"));
+               _exportImagesCheckbox.setHorizontalTextPosition(SwingConstants.LEFT);
+               _exportImagesCheckbox.setAlignmentX(Component.CENTER_ALIGNMENT);
+               // enable image size fields if image checkbox changes
+               _exportImagesCheckbox.addActionListener(new ActionListener() {
+                       public void actionPerformed(ActionEvent arg0) {
+                               enableImageSizeFields();
+                       }
+               });
+               mainPanel.add(_exportImagesCheckbox);
+               // Panel for the image size
+               JPanel imageSizePanel = new JPanel();
+               imageSizePanel.setLayout(new FlowLayout(FlowLayout.CENTER));
+               _imageSizeLabel = new JLabel(I18nManager.getText("dialog.exportkml.imagesize"));
+               _imageSizeLabel.setAlignmentX(Component.RIGHT_ALIGNMENT);
+               imageSizePanel.add(_imageSizeLabel);
+               _imageSizeField = new WholeNumberField(4);
+               imageSizePanel.add(_imageSizeField);
+               mainPanel.add(imageSizePanel);
+
+               mainPanel.add(Box.createVerticalStrut(10));
+               _progressLabel = new JLabel("...");
+               _progressLabel.setAlignmentX(Component.CENTER_ALIGNMENT);
+               mainPanel.add(_progressLabel);
+               _progressBar = new JProgressBar(0, 100);
+               _progressBar.setVisible(false);
+               _progressBar.setAlignmentX(Component.CENTER_ALIGNMENT);
+               mainPanel.add(_progressBar);
+               mainPanel.add(Box.createVerticalStrut(10));
+               // button panel at bottom
+               JPanel buttonPanel = new JPanel();
+               buttonPanel.setLayout(new FlowLayout(FlowLayout.RIGHT));
+               _okButton = new JButton(I18nManager.getText("button.ok"));
+               ActionListener okListener = new ActionListener() {
+                       public void actionPerformed(ActionEvent e)
+                       {
+                               startExport();
+                       }
+               };
+               _okButton.addActionListener(okListener);
+               _descriptionField.addActionListener(okListener);
+               buttonPanel.add(_okButton);
+               JButton cancelButton = new JButton(I18nManager.getText("button.cancel"));
+               cancelButton.addActionListener(new ActionListener() {
+                       public void actionPerformed(ActionEvent e)
+                       {
+                               _cancelPressed = true;
+                               _dialog.dispose();
+                       }
+               });
+               buttonPanel.add(cancelButton);
+               dialogPanel.add(buttonPanel, BorderLayout.SOUTH);
+               return dialogPanel;
+       }
+
+
+       /**
+        * Enable the checkboxes according to data
+        */
+       private void enableCheckboxes()
+       {
+               _pointTypeSelector.init(_trackInfo);
+               boolean hasAltitudes = _track.hasData(Field.ALTITUDE);
+               if (!hasAltitudes) {_altitudesCheckbox.setSelected(false);}
+               boolean hasPhotos = _trackInfo.getPhotoList() != null && _trackInfo.getPhotoList().getNumPhotos() > 0;
+               _exportImagesCheckbox.setSelected(hasPhotos && _kmzCheckbox.isSelected());
+               _exportImagesCheckbox.setEnabled(hasPhotos && _kmzCheckbox.isSelected());
+               enableImageSizeFields();
+       }
+
+       /**
+        * Enable and disable the image size fields according to the checkboxes
+        */
+       private void enableImageSizeFields()
+       {
+               boolean exportImages = _exportImagesCheckbox.isEnabled() && _exportImagesCheckbox.isSelected();
+               _imageSizeField.setEnabled(exportImages);
+               _imageSizeLabel.setEnabled(exportImages);
+       }
+
+
+       /**
+        * @return true if using gx extensions for kml export
+        */
+       private boolean useGxExtensions() {
+               return _gxExtensionsRadio.isSelected();
+       }
+       /**
+        * Start the export process based on the input parameters
+        */
+       private void startExport()
+       {
+               // OK pressed, now validate selection checkboxes
+               if (!_pointTypeSelector.getAnythingSelected()) {
+                       JOptionPane.showMessageDialog(_parentFrame, I18nManager.getText("dialog.save.notypesselected"),
+                               I18nManager.getText("dialog.saveoptions.title"), JOptionPane.WARNING_MESSAGE);
+                       return;
+               }
+               // Choose output file
+               if (_fileChooser == null)
+               {
+                       _fileChooser = new JFileChooser();
+                       _fileChooser.setDialogType(JFileChooser.SAVE_DIALOG);
+                       _fileChooser.setFileFilter(new GenericFileFilter("filetype.kmlkmz", new String[] {"kml", "kmz"}));
+                       // start from directory in config which should be set
+                       String configDir = Config.getConfigString(Config.KEY_TRACK_DIR);
+                       if (configDir != null) {_fileChooser.setCurrentDirectory(new File(configDir));}
+               }
+               String requiredExtension = null, otherExtension = null;
+               if (_kmzCheckbox.isSelected()) {
+                       requiredExtension = ".kmz"; otherExtension = ".kml";
+               }
+               else {
+                       requiredExtension = ".kml"; otherExtension = ".kmz";
+               }
+               _fileChooser.setAcceptAllFileFilterUsed(false);
+               // Allow choose again if an existing file is selected
+               boolean chooseAgain = false;
+               do
+               {
+                       chooseAgain = false;
+                       if (_fileChooser.showSaveDialog(_parentFrame) == JFileChooser.APPROVE_OPTION)
+                       {
+                               // OK pressed and file chosen
+                               File file = _fileChooser.getSelectedFile();
+                               if (file.getName().toLowerCase().endsWith(otherExtension))
+                               {
+                                       String path = file.getAbsolutePath();
+                                       file = new File(path.substring(0, path.length()-otherExtension.length()) + requiredExtension);
+                               }
+                               else if (!file.getName().toLowerCase().endsWith(requiredExtension))
+                               {
+                                       file = new File(file.getAbsolutePath() + requiredExtension);
+                               }
+                               // Check if file exists and if necessary prompt for overwrite
+                               Object[] buttonTexts = {I18nManager.getText("button.overwrite"), I18nManager.getText("button.cancel")};
+                               if (!file.exists() || JOptionPane.showOptionDialog(_parentFrame,
+                                               I18nManager.getText("dialog.save.overwrite.text"),
+                                               I18nManager.getText("dialog.save.overwrite.title"), JOptionPane.YES_NO_OPTION,
+                                               JOptionPane.WARNING_MESSAGE, null, buttonTexts, buttonTexts[1])
+                                       == JOptionPane.YES_OPTION)
+                               {
+                                       // New file or overwrite confirmed, so initiate export in separate thread
+                                       _exportFile = file;
+                                       _cancelPressed = false;
+                                       new Thread(this).start();
+                               }
+                               else
+                               {
+                                       chooseAgain = true;
+                               }
+                       }
+               } while (chooseAgain);
+       }
+
+
+       /**
+        * Run method for controlling separate thread for exporting
+        */
+       public void run()
+       {
+               // Disable ok button to stop second go
+               _okButton.setEnabled(false);
+               _descriptionField.setEnabled(false);
+               // Initialise progress indicators
+               _progressLabel.setText(I18nManager.getText("confirm.running"));
+               _progressBar.setVisible(true);
+               _progressBar.setValue(0);
+               boolean exportToKmz = _kmzCheckbox.isSelected();
+               boolean exportImages = exportToKmz && _exportImagesCheckbox.isSelected();
+               _progressBar.setMaximum(exportImages?getNumPhotosToExport():1);
+
+               // Create array for image dimensions in case it's required
+               _imageDimensions = new Dimension[_track.getNumPoints()];
+
+               OutputStreamWriter writer = null;
+               ZipOutputStream zipOutputStream = null;
+               try
+               {
+                       // Select writer according to whether kmz requested or not
+                       if (!_kmzCheckbox.isSelected())
+                       {
+                               // normal writing to file
+                               writer = new OutputStreamWriter(new FileOutputStream(_exportFile));
+                       }
+                       else
+                       {
+                               // kmz requested - need zip output stream
+                               zipOutputStream = new ZipOutputStream(new FileOutputStream(_exportFile));
+                               // Export images into zip file too if requested
+                               if (exportImages)
+                               {
+                                       // Get entered value for image size, store in config
+                                       int thumbSize = _imageSizeField.getValue();
+                                       if (thumbSize < DEFAULT_THUMBNAIL_WIDTH) {thumbSize = DEFAULT_THUMBNAIL_WIDTH;}
+                                       Config.setConfigInt(Config.KEY_KMZ_IMAGE_SIZE, thumbSize);
+
+                                       // Create thumbnails of each photo in turn and add to zip as images/image<n>.jpg
+                                       // This is done first so that photo sizes are known for later
+                                       exportThumbnails(zipOutputStream, thumbSize);
+                               }
+                               writer = new OutputStreamWriter(zipOutputStream);
+                               // Make an entry in the zip file for the kml file
+                               ZipEntry kmlEntry = new ZipEntry(KML_FILENAME_IN_KMZ);
+                               zipOutputStream.putNextEntry(kmlEntry);
+                       }
+                       // write file
+                       final int numPoints = exportData(writer, exportImages);
+                       // update config with selected track colour
+                       Config.setConfigString(Config.KEY_KML_TRACK_COLOUR, ColourUtils.makeHexCode(_colourPatch.getBackground()));
+                       // update progress bar
+                       _progressBar.setValue(1);
+
+                       // close zip entry if necessary
+                       if (zipOutputStream != null)
+                       {
+                               // Make sure all buffered data in writer is flushed
+                               writer.flush();
+                               // Close off this entry in the zip file
+                               zipOutputStream.closeEntry();
+                       }
+
+                       // close file
+                       writer.close();
+                       _imageDimensions = null;
+                       // Store directory in config for later
+                       Config.setConfigString(Config.KEY_TRACK_DIR, _exportFile.getParentFile().getAbsolutePath());
+                       // Add to recent file list
+                       Config.getRecentFileList().addFile(new RecentFile(_exportFile, true));
+                       // show confirmation
+                       UpdateMessageBroker.informSubscribers();
+                       UpdateMessageBroker.informSubscribers(I18nManager.getText("confirm.save.ok1")
+                                + " " + numPoints + " " + I18nManager.getText("confirm.save.ok2")
+                                + " " + _exportFile.getAbsolutePath());
+                       // export successful so need to close dialog and return
+                       _dialog.dispose();
+                       return;
+               }
+               catch (IOException ioe)
+               {
+                       try {
+                               if (writer != null) writer.close();
+                       }
+                       catch (IOException ioe2) {}
+                       JOptionPane.showMessageDialog(_parentFrame,
+                               I18nManager.getText("error.save.failed") + " : " + ioe.getMessage(),
+                               I18nManager.getText("error.save.dialogtitle"), JOptionPane.ERROR_MESSAGE);
+               }
+               // if not returned already, export failed so need to recall the file selection
+               startExport();
+       }
+
+
+       /**
+        * Export the information to the given writer
+        * @param inWriter writer object
+        * @param inExportImages true if image thumbnails are to be referenced
+        * @return number of points written
+        */
+       private int exportData(OutputStreamWriter inWriter, boolean inExportImages)
+       throws IOException
+       {
+               boolean writeTrack = _pointTypeSelector.getTrackpointsSelected();
+               boolean writeWaypoints = _pointTypeSelector.getWaypointsSelected();
+               boolean writePhotos = _pointTypeSelector.getPhotopointsSelected();
+               boolean writeAudios = _pointTypeSelector.getAudiopointsSelected();
+               boolean justSelection = _pointTypeSelector.getJustSelection();
+               // Define xml header (depending on whether extensions are used or not)
+               if (useGxExtensions()) {
+                       inWriter.write("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<kml xmlns=\"http://earth.google.com/kml/2.2\" xmlns:gx=\"http://www.google.com/kml/ext/2.2\">\n");
+               }
+               else {
+                       inWriter.write("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<kml xmlns=\"http://earth.google.com/kml/2.1\">\n");
+               }
+               inWriter.write("<Folder>\n\t<name>");
+               if (_descriptionField != null && _descriptionField.getText() != null && !_descriptionField.getText().equals(""))
+               {
+                       inWriter.write(XmlUtils.fixCdata(_descriptionField.getText()));
+               }
+               else {
+                       inWriter.write("Export from GpsPrune");
+               }
+               inWriter.write("</name>\n");
+
+               // Examine selection if required
+               int selStart = -1, selEnd = -1;
+               if (justSelection) {
+                       selStart = _trackInfo.getSelection().getStart();
+                       selEnd = _trackInfo.getSelection().getEnd();
+               }
+
+               boolean absoluteAltitudes = _altitudesCheckbox.isSelected();
+               int i = 0;
+               DataPoint point = null;
+               boolean hasTrackpoints = false;
+               boolean writtenPhotoHeader = false, writtenAudioHeader = false;
+               final int numPoints = _track.getNumPoints();
+               int numSaved = 0;
+               int photoNum = 0;
+               // Loop over waypoints
+               for (i=0; i<numPoints; i++)
+               {
+                       point = _track.getPoint(i);
+                       boolean writeCurrentPoint = !justSelection || (i>=selStart && i<=selEnd);
+                       // Make a blob for each waypoint
+                       if (point.isWaypoint())
+                       {
+                               if (writeWaypoints && writeCurrentPoint)
+                               {
+                                       exportWaypoint(point, inWriter, absoluteAltitudes);
+                                       numSaved++;
+                               }
+                       }
+                       else if (!point.hasMedia())
+                       {
+                               hasTrackpoints = true;
+                       }
+                       // Make a blob with description for each photo
+                       // Photos have already been written so picture sizes already known
+                       if (point.getPhoto() != null && point.getPhoto().isValid() && writePhotos && writeCurrentPoint)
+                       {
+                               if (!writtenPhotoHeader)
+                               {
+                                       inWriter.write("<Style id=\"camera_icon\"><IconStyle><Icon><href>http://maps.google.com/mapfiles/kml/pal4/icon46.png</href></Icon></IconStyle></Style>");
+                                       writtenPhotoHeader = true;
+                               }
+                               photoNum++;
+                               exportPhotoPoint(point, inWriter, inExportImages, i, photoNum, absoluteAltitudes);
+                               numSaved++;
+                       }
+                       // Make a blob with description for each audio clip
+                       if (point.getAudio() != null && writeAudios && writeCurrentPoint)
+                       {
+                               if (!writtenAudioHeader)
+                               {
+                                       inWriter.write("<Style id=\"audio_icon\"><IconStyle><color>ff00ffff</color><Icon><href>http://maps.google.com/mapfiles/kml/shapes/star.png</href></Icon></IconStyle></Style>");
+                                       writtenAudioHeader = true;
+                               }
+                               exportAudioPoint(point, inWriter, absoluteAltitudes);
+                               numSaved++;
+                       }
+               }
+               // Make a line for the track, if there is one
+               if (hasTrackpoints && writeTrack)
+               {
+                       boolean useGxExtensions = _gxExtensionsRadio.isSelected();
+                       if (useGxExtensions)
+                       {
+                               // Write track using the Google Extensions to KML including gx:Track
+                               numSaved += writeGxTrack(inWriter, absoluteAltitudes, selStart, selEnd);
+                       }
+                       else {
+                               // Write track using standard KML
+                               numSaved += writeStandardTrack(inWriter, absoluteAltitudes, selStart, selEnd);
+                       }
+               }
+               inWriter.write("</Folder>\n</kml>\n");
+               return numSaved;
+       }
+
+
+       /**
+        * Write out the track using standard KML LineString tag
+        * @param inWriter writer object to write to
+        * @param inAbsoluteAltitudes true to use absolute altitudes, false to clamp to ground
+        * @param inSelStart start index of selection, or -1 if whole track
+        * @param inSelEnd     end index of selection, or -1 if whole track
+        * @return number of track points written
+        */
+       private int writeStandardTrack(OutputStreamWriter inWriter, boolean inAbsoluteAltitudes, int inSelStart,
+               int inSelEnd)
+       throws IOException
+       {
+               int numSaved = 0;
+               // Set up strings for start and end of track segment
+               String trackStart = "\t<Placemark>\n\t\t<name>track</name>\n\t\t<Style>\n\t\t\t<LineStyle>\n"
+                       + "\t\t\t\t<color>cc" + reverse(ColourUtils.makeHexCode(_colourPatch.getBackground())) + "</color>\n"
+                       + "\t\t\t\t<width>4</width>\n\t\t\t</LineStyle>\n"
+                       + "\t\t</Style>\n\t\t<LineString>\n";
+               if (inAbsoluteAltitudes) {
+                       trackStart += "\t\t\t<extrude>1</extrude>\n\t\t\t<altitudeMode>absolute</altitudeMode>\n";
+               }
+               else {
+                       trackStart += "\t\t\t<altitudeMode>clampToGround</altitudeMode>\n";
+               }
+               trackStart += "\t\t\t<coordinates>";
+               String trackEnd = "\t\t\t</coordinates>\n\t\t</LineString>\n\t</Placemark>";
+
+               boolean justSelection = _pointTypeSelector.getJustSelection();
+
+               // Start segment
+               inWriter.write(trackStart);
+               // Loop over track points
+               boolean firstTrackpoint = true;
+               final int numPoints = _track.getNumPoints();
+               for (int i=0; i<numPoints; i++)
+               {
+                       DataPoint point = _track.getPoint(i);
+                       boolean writeCurrentPoint = !justSelection || (i>=inSelStart && i<=inSelEnd);
+                       if (!point.isWaypoint() && writeCurrentPoint)
+                       {
+                               // start new track segment if necessary
+                               if (point.getSegmentStart() && !firstTrackpoint) {
+                                       inWriter.write(trackEnd);
+                                       inWriter.write(trackStart);
+                               }
+                               if (point.getPhoto() == null)
+                               {
+                                       exportTrackpoint(point, inWriter);
+                                       numSaved++;
+                                       firstTrackpoint = false;
+                               }
+                       }
+               }
+               // end segment
+               inWriter.write(trackEnd);
+               return numSaved;
+       }
+
+
+       /**
+        * Write out the track using Google's KML Extensions such as gx:Track
+        * @param inWriter writer object to write to
+        * @param inAbsoluteAltitudes true to use absolute altitudes, false to clamp to ground
+        * @param inSelStart start index of selection, or -1 if whole track
+        * @param inSelEnd     end index of selection, or -1 if whole track
+        * @return number of track points written
+        */
+       private int writeGxTrack(OutputStreamWriter inWriter, boolean inAbsoluteAltitudes, int inSelStart,
+               int inSelEnd)
+       throws IOException
+       {
+               int numSaved = 0;
+               // Set up strings for start and end of track segment
+               String trackStart = "\t<Placemark>\n\t\t<name>track</name>\n\t\t<Style>\n\t\t\t<LineStyle>\n"
+                       + "\t\t\t\t<color>cc" + reverse(ColourUtils.makeHexCode(_colourPatch.getBackground())) + "</color>\n"
+                       + "\t\t\t\t<width>4</width>\n\t\t\t</LineStyle>\n"
+                       + "\t\t</Style>\n\t\t<gx:Track>\n";
+               if (inAbsoluteAltitudes) {
+                       trackStart += "\t\t\t<extrude>1</extrude>\n\t\t\t<altitudeMode>absolute</altitudeMode>\n";
+               }
+               else {
+                       trackStart += "\t\t\t<altitudeMode>clampToGround</altitudeMode>\n";
+               }
+               String trackEnd = "\n\t\t</gx:Track>\n\t</Placemark>\n";
+
+               boolean justSelection = _pointTypeSelector.getJustSelection();
+
+               // Start segment
+               inWriter.write(trackStart);
+               StringBuilder whenList = new StringBuilder();
+               StringBuilder coordList = new StringBuilder();
+
+               // Loop over track points
+               boolean firstTrackpoint = true;
+               final int numPoints = _track.getNumPoints();
+               for (int i=0; i<numPoints; i++)
+               {
+                       DataPoint point = _track.getPoint(i);
+                       boolean writeCurrentPoint = !justSelection || (i>=inSelStart && i<=inSelEnd);
+                       if (!point.isWaypoint() && writeCurrentPoint)
+                       {
+                               // start new track segment if necessary
+                               if (point.getSegmentStart() && !firstTrackpoint)
+                               {
+                                       inWriter.write(whenList.toString());
+                                       inWriter.write('\n');
+                                       inWriter.write(coordList.toString());
+                                       inWriter.write('\n');
+                                       inWriter.write(trackEnd);
+                                       whenList.setLength(0); coordList.setLength(0);
+                                       inWriter.write(trackStart);
+                               }
+                               if (point.getPhoto() == null)
+                               {
+                                       // Add timestamp (if any) to the list
+                                       whenList.append("<when>");
+                                       if (point.hasTimestamp()) {
+                                               whenList.append(point.getTimestamp().getText(Timestamp.Format.ISO8601, null));
+                                       }
+                                       whenList.append("</when>\n");
+                                       // Add coordinates to the list
+                                       coordList.append("<gx:coord>");
+                                       coordList.append(point.getLongitude().output(Coordinate.FORMAT_DECIMAL_FORCE_POINT)).append(' ');
+                                       coordList.append(point.getLatitude().output(Coordinate.FORMAT_DECIMAL_FORCE_POINT)).append(' ');
+                                       if (point.hasAltitude()) {
+                                               coordList.append("" + point.getAltitude().getStringValue(UnitSetLibrary.UNITS_METRES));
+                                       }
+                                       else {
+                                               coordList.append('0');
+                                       }
+                                       coordList.append("</gx:coord>\n");
+                                       numSaved++;
+                                       firstTrackpoint = false;
+                               }
+                       }
+               }
+               // end segment
+               inWriter.write(whenList.toString());
+               inWriter.write('\n');
+               inWriter.write(coordList.toString());
+               inWriter.write('\n');
+               inWriter.write(trackEnd);
+               return numSaved;
+       }
+
+
+       /**
+        * Reverse the hex code for the colours for KML's stupid backwards format
+        * @param inCode colour code rrggbb
+        * @return kml code bbggrr
+        */
+       private static String reverse(String inCode)
+       {
+               return inCode.substring(4, 6) + inCode.substring(2, 4) + inCode.substring(0, 2);
+       }
+
+       /**
+        * Export the specified waypoint into the file
+        * @param inPoint waypoint to export
+        * @param inWriter writer object
+        * @param inAbsoluteAltitude true for absolute altitude
+        * @throws IOException on write failure
+        */
+       private void exportWaypoint(DataPoint inPoint, Writer inWriter, boolean inAbsoluteAltitude) throws IOException
+       {
+               String name = inPoint.getWaypointName().trim();
+               exportNamedPoint(inPoint, inWriter, name, inPoint.getFieldValue(Field.DESCRIPTION), null, inAbsoluteAltitude);
+       }
+
+
+       /**
+        * Export the specified audio point into the file
+        * @param inPoint audio point to export
+        * @param inWriter writer object
+        * @param inAbsoluteAltitude true for absolute altitude
+        * @throws IOException on write failure
+        */
+       private void exportAudioPoint(DataPoint inPoint, Writer inWriter, boolean inAbsoluteAltitude) throws IOException
+       {
+               String name = inPoint.getAudio().getName();
+               String desc = null;
+               if (inPoint.getAudio().getFile() != null) {
+                       desc = inPoint.getAudio().getFile().getAbsolutePath();
+               }
+               exportNamedPoint(inPoint, inWriter, name, desc, "audio_icon", inAbsoluteAltitude);
+       }
+
+
+       /**
+        * Export the specified photo into the file
+        * @param inPoint data point including photo
+        * @param inWriter writer object
+        * @param inImageLink flag to set whether to export image links or not
+        * @param inPointNumber number of point for accessing dimensions
+        * @param inImageNumber number of image for filename
+        * @param inAbsoluteAltitude true for absolute altitudes
+        * @throws IOException on write failure
+        */
+       private void exportPhotoPoint(DataPoint inPoint, Writer inWriter, boolean inImageLink,
+               int inPointNumber, int inImageNumber, boolean inAbsoluteAltitude)
+       throws IOException
+       {
+               String name = inPoint.getPhoto().getName();
+               String desc = null;
+               if (inImageLink)
+               {
+                       Dimension imageSize = _imageDimensions[inPointNumber];
+                       // Create html for the thumbnail images
+                       desc = "<![CDATA[<br/><table border='0'><tr><td><center><img src='images/image"
+                               + inImageNumber + ".jpg' width='" + imageSize.width + "' height='" + imageSize.height + "'></center></td></tr>"
+                               + "<tr><td><center>" + name + "</center></td></tr></table>]]>";
+               }
+               // Export point
+               exportNamedPoint(inPoint, inWriter, name, desc, "camera_icon", inAbsoluteAltitude);
+       }
+
+
+       /**
+        * Export the specified named point into the file, like waypoint or photo point
+        * @param inPoint data point
+        * @param inWriter writer object
+        * @param inName name of point
+        * @param inDesc description of point, or null
+        * @param inStyle style of point, or null
+        * @param inAbsoluteAltitude true for absolute altitudes
+        * @throws IOException on write failure
+        */
+       private void exportNamedPoint(DataPoint inPoint, Writer inWriter, String inName,
+               String inDesc, String inStyle, boolean inAbsoluteAltitude)
+       throws IOException
+       {
+               inWriter.write("\t<Placemark>\n\t\t<name>");
+               inWriter.write(XmlUtils.fixCdata(inName));
+               inWriter.write("</name>\n");
+               if (inDesc != null)
+               {
+                       // Write out description
+                       inWriter.write("\t\t<description>");
+                       inWriter.write(XmlUtils.fixCdata(inDesc));
+                       inWriter.write("</description>\n");
+               }
+               if (inStyle != null)
+               {
+                       inWriter.write("<styleUrl>#");
+                       inWriter.write(inStyle);
+                       inWriter.write("</styleUrl>\n");
+               }
+               inWriter.write("\t\t<Point>\n");
+               if (inAbsoluteAltitude && inPoint.hasAltitude()) {
+                       inWriter.write("\t\t\t<altitudeMode>absolute</altitudeMode>\n");
+               }
+               else {
+                       inWriter.write("\t\t\t<altitudeMode>clampToGround</altitudeMode>\n");
+               }
+               inWriter.write("\t\t\t<coordinates>");
+               inWriter.write(inPoint.getLongitude().output(Coordinate.FORMAT_DECIMAL_FORCE_POINT));
+               inWriter.write(',');
+               inWriter.write(inPoint.getLatitude().output(Coordinate.FORMAT_DECIMAL_FORCE_POINT));
+               inWriter.write(',');
+               // Altitude if point has one
+               if (inPoint.hasAltitude()) {
+                       inWriter.write("" + inPoint.getAltitude().getStringValue(UnitSetLibrary.UNITS_METRES));
+               }
+               else {
+                       inWriter.write('0');
+               }
+               inWriter.write("</coordinates>\n\t\t</Point>\n\t</Placemark>\n");
+       }
+
+
+       /**
+        * Export the specified trackpoint into the file
+        * @param inPoint trackpoint to export
+        * @param inWriter writer object
+        */
+       private void exportTrackpoint(DataPoint inPoint, Writer inWriter) throws IOException
+       {
+               inWriter.write(inPoint.getLongitude().output(Coordinate.FORMAT_DECIMAL_FORCE_POINT));
+               inWriter.write(',');
+               inWriter.write(inPoint.getLatitude().output(Coordinate.FORMAT_DECIMAL_FORCE_POINT));
+               // Altitude if point has one
+               inWriter.write(',');
+               if (inPoint.hasAltitude()) {
+                       inWriter.write("" + inPoint.getAltitude().getStringValue(UnitSetLibrary.UNITS_METRES));
+               }
+               else {
+                       inWriter.write('0');
+               }
+               inWriter.write('\n');
+       }
+
+
+       /**
+        * Loop through the photos and create thumbnails
+        * @param inZipStream zip stream to save image files to
+        * @param inThumbSize thumbnail size
+        */
+       private void exportThumbnails(ZipOutputStream inZipStream, int inThumbSize)
+       throws IOException
+       {
+               // set up image writer
+               Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName("jpg");
+               if (writers == null || !writers.hasNext())
+               {
+                       throw new IOException("no JPEG writer found");
+               }
+               ImageWriter imageWriter = writers.next();
+
+               // Check selection checkbox
+               final boolean justSelection = _pointTypeSelector.getJustSelection();
+               int selStart = -1, selEnd = -1;
+               if (justSelection) {
+                       selStart = _trackInfo.getSelection().getStart();
+                       selEnd = _trackInfo.getSelection().getEnd();
+               }
+
+               final int numPoints = _track.getNumPoints();
+               DataPoint point = null;
+               int photoNum = 0;
+               // Loop over all points in track
+               for (int i=0; i<numPoints && !_cancelPressed; i++)
+               {
+                       point = _track.getPoint(i);
+                       if (point.getPhoto() != null && point.getPhoto().isValid() && (!justSelection || (i>=selStart && i<=selEnd)))
+                       {
+                               photoNum++;
+                               // Make a new entry in zip file
+                               ZipEntry entry = new ZipEntry("images/image" + photoNum + ".jpg");
+                               inZipStream.putNextEntry(entry);
+                               // Load image and write to outstream
+                               ImageIcon icon = point.getPhoto().createImageIcon();
+
+                               // Scale image to required size (not smoothed)
+                               BufferedImage bufferedImage = ImageUtils.rotateImage(icon.getImage(),
+                                       inThumbSize, inThumbSize, point.getPhoto().getRotationDegrees());
+                               // Store image dimensions so that it doesn't have to be calculated again for the points
+                               _imageDimensions[i] = new Dimension(bufferedImage.getWidth(), bufferedImage.getHeight());
+
+                               imageWriter.setOutput(ImageIO.createImageOutputStream(inZipStream));
+                               imageWriter.write(bufferedImage);
+                               // Close zip file entry
+                               inZipStream.closeEntry();
+                               // Update progress bar
+                               _progressBar.setValue(photoNum+1);
+                       }
+               }
+       }
+
+
+       /**
+        * @return number of correlated photos in the track
+        */
+       private int getNumPhotosToExport()
+       {
+               int numPoints = _track.getNumPoints();
+               int numPhotos = 0;
+               DataPoint point = null;
+               // Loop over all points in track
+               for (int i=0; i<numPoints; i++)
+               {
+                       point = _track.getPoint(i);
+                       if (point.getPhoto() != null) {
+                               numPhotos++;
+                       }
+               }
+               return numPhotos;
+       }
+}