]> gitweb.fperrin.net Git - GpsPrune.git/blobdiff - tim/prune/load/TextFileLoader.java
Moved source into separate src directory due to popular request
[GpsPrune.git] / tim / prune / load / TextFileLoader.java
diff --git a/tim/prune/load/TextFileLoader.java b/tim/prune/load/TextFileLoader.java
deleted file mode 100644 (file)
index b4a0ca8..0000000
+++ /dev/null
@@ -1,711 +0,0 @@
-package tim.prune.load;
-
-import java.awt.BorderLayout;
-import java.awt.Component;
-import java.awt.Dimension;
-import java.awt.FlowLayout;
-import java.awt.GridLayout;
-import java.awt.event.ActionEvent;
-import java.awt.event.ActionListener;
-import java.awt.event.WindowAdapter;
-import java.awt.event.WindowEvent;
-
-import javax.swing.*;
-import javax.swing.event.DocumentEvent;
-import javax.swing.event.DocumentListener;
-import javax.swing.event.ListSelectionEvent;
-import javax.swing.event.ListSelectionListener;
-import javax.swing.table.TableCellEditor;
-
-import java.io.File;
-
-import tim.prune.App;
-import tim.prune.I18nManager;
-import tim.prune.data.Field;
-import tim.prune.data.PointCreateOptions;
-import tim.prune.data.SourceInfo;
-import tim.prune.data.Unit;
-import tim.prune.data.UnitSetLibrary;
-import tim.prune.gui.GuiGridLayout;
-import tim.prune.gui.WizardLayout;
-
-
-/**
- * Class to handle loading of text files including GUI options,
- * and passing loaded data back to App object
- */
-public class TextFileLoader
-{
-       private File _file = null;
-       private App _app = null;
-       private JFrame _parentFrame = null;
-       private JDialog _dialog = null;
-       private WizardLayout _wizard = null;
-       private JButton _backButton = null, _nextButton = null;
-       private JButton _finishButton = null;
-       private JButton _moveUpButton = null, _moveDownButton = null;
-       private JRadioButton[] _delimiterRadios = null;
-       private JTextField _otherDelimiterText = null;
-       private JLabel _statusLabel = null;
-       private DelimiterInfo[] _delimiterInfos = null;
-       private FileCacher _fileCacher = null;
-       private JList<String> _snippetBox = null;
-       private FileExtractTableModel _fileExtractTableModel = null;
-       private JTable _fieldTable;
-       private FieldSelectionTableModel _fieldTableModel = null;
-       private JComboBox<String> _altitudeUnitsDropdown = null;
-       private JComboBox<String> _hSpeedUnitsDropdown = null;
-       private JComboBox<String> _vSpeedUnitsDropdown = null;
-       private JRadioButton _vSpeedUpwardsRadio = null;
-       private ComponentHider _componentHider = null;
-       private int _selectedField = -1;
-       private char _currentDelimiter = ',';
-
-       // previously selected values
-       private char _lastUsedDelimiter = ',';
-       private Field[] _lastSelectedFields = null;
-       private Unit _lastAltitudeUnit = null;
-
-       // constants
-       private static final int SNIPPET_SIZE = 6;
-       private static final int MAX_SNIPPET_WIDTH = 80;
-       private static final char[] DELIMITERS = {',', '\t', ';', ' '};
-
-
-       /**
-        * Inner class to listen for delimiter change operations
-        */
-       private class DelimListener implements ActionListener, DocumentListener
-       {
-               public void actionPerformed(ActionEvent e)
-               {
-                       informDelimiterSelected();
-               }
-               public void changedUpdate(DocumentEvent e)
-               {
-                       informDelimiterSelected();
-               }
-               public void insertUpdate(DocumentEvent e)
-               {
-                       informDelimiterSelected();
-               }
-               public void removeUpdate(DocumentEvent e)
-               {
-                       informDelimiterSelected();
-               }
-       }
-
-
-       /**
-        * Constructor
-        * @param inApp Application object to inform of track load
-        * @param inParentFrame parent frame to reference for dialogs
-        */
-       public TextFileLoader(App inApp, JFrame inParentFrame)
-       {
-               _app = inApp;
-               _parentFrame = inParentFrame;
-       }
-
-
-       /**
-        * Open the selected file and show the GUI dialog to select load options
-        * @param inFile file to open
-        */
-       public void openFile(File inFile)
-       {
-               _file = inFile;
-               if (preCheckFile(_file))
-               {
-                       _dialog = new JDialog(_parentFrame, I18nManager.getText("dialog.openoptions.title"), true);
-                       _dialog.setLocationRelativeTo(_parentFrame);
-                       _dialog.setDefaultCloseOperation(JDialog.DO_NOTHING_ON_CLOSE);
-                       // add closing listener
-                       _dialog.addWindowListener(new WindowAdapter() {
-                               public void windowClosing(WindowEvent e) {
-                                       _dialog.dispose();
-                                       _app.informNoDataLoaded();
-                               }
-                       });
-                       _dialog.getContentPane().add(makeDialogComponents());
-
-                       // select best separator according to row counts (more is better)
-                       int bestDelim = getBestOption(_delimiterInfos[0].getNumWinningRecords(),
-                               _delimiterInfos[1].getNumWinningRecords(), _delimiterInfos[2].getNumWinningRecords(),
-                               _delimiterInfos[3].getNumWinningRecords());
-                       if (bestDelim >= 0)
-                               _delimiterRadios[bestDelim].setSelected(true);
-                       else
-                               _delimiterRadios[_delimiterRadios.length-1].setSelected(true);
-                       informDelimiterSelected();
-                       _dialog.pack();
-                       _dialog.setVisible(true);
-               }
-               else
-               {
-                       // Didn't pass pre-check
-                       _app.showErrorMessageNoLookup("error.load.dialogtitle",
-                               I18nManager.getText("error.load.noread") + ": " + inFile.getName());
-                       _app.informNoDataLoaded();
-               }
-       }
-
-
-       /**
-        * Check the given file for readability and funny characters,
-        * and count the fields for the various separators
-        * @param inFile file to check
-        */
-       private boolean preCheckFile(File inFile)
-       {
-               // Check file exists and is readable
-               if (inFile == null || !inFile.exists() || !inFile.canRead())
-               {
-                       return false;
-               }
-               // Use a FileCacher to read the file into an array
-               _fileCacher = new FileCacher(inFile);
-
-               // Check each line of the file
-               String[] fileContents = _fileCacher.getContents();
-               if (fileContents == null) {
-                       return false; // nothing cached, might be binary
-               }
-               boolean fileOK = true;
-               _delimiterInfos = new DelimiterInfo[5];
-               for (int i=0; i<4; i++) _delimiterInfos[i] = new DelimiterInfo(DELIMITERS[i]);
-
-               String currLine = null;
-               String[] splitFields = null;
-               int commaFields = 0, semicolonFields = 0, tabFields = 0, spaceFields = 0;
-               for (int lineNum=0; lineNum<fileContents.length && fileOK; lineNum++)
-               {
-                       currLine = fileContents[lineNum];
-                       // check for invalid characters
-                       if (currLine.indexOf('\0') >= 0) {fileOK = false;}
-                       // check for commas
-                       splitFields = currLine.split(",");
-                       commaFields = splitFields.length;
-                       if (commaFields > 1) _delimiterInfos[0].incrementNumRecords();
-                       _delimiterInfos[0].updateMaxFields(commaFields);
-                       // check for tabs
-                       splitFields = currLine.split("\t");
-                       tabFields = splitFields.length;
-                       if (tabFields > 1) _delimiterInfos[1].incrementNumRecords();
-                       _delimiterInfos[1].updateMaxFields(tabFields);
-                       // check for semicolons
-                       splitFields = currLine.split(";");
-                       semicolonFields = splitFields.length;
-                       if (semicolonFields > 1) _delimiterInfos[2].incrementNumRecords();
-                       _delimiterInfos[2].updateMaxFields(semicolonFields);
-                       // check for spaces
-                       splitFields = currLine.split(" ");
-                       spaceFields = splitFields.length;
-                       if (spaceFields > 1) _delimiterInfos[3].incrementNumRecords();
-                       _delimiterInfos[3].updateMaxFields(spaceFields);
-                       // increment counters
-                       int bestScorer = getBestOption(commaFields, tabFields, semicolonFields, spaceFields);
-                       if (bestScorer >= 0)
-                               _delimiterInfos[bestScorer].incrementNumWinningRecords();
-               }
-               return fileOK;
-       }
-
-
-       /**
-        * Get the index of the best one in the list
-        * @return the index of the maximum of the four given values
-        */
-       private static int getBestOption(int inOpt0, int inOpt1, int inOpt2, int inOpt3)
-       {
-               int bestIndex = -1;
-               int maxScore = 1;
-               if (inOpt0 > maxScore) {bestIndex = 0; maxScore = inOpt0;}
-               if (inOpt1 > maxScore) {bestIndex = 1; maxScore = inOpt1;}
-               if (inOpt2 > maxScore) {bestIndex = 2; maxScore = inOpt2;}
-               if (inOpt3 > maxScore) {bestIndex = 3; maxScore = inOpt3;}
-               return bestIndex;
-       }
-
-
-       /**
-        * Make the components for the open options dialog
-        * @return Component for all options
-        */
-       private Component makeDialogComponents()
-       {
-               JPanel wholePanel = new JPanel();
-               wholePanel.setLayout(new BorderLayout());
-
-               // add buttons to south
-               JPanel buttonPanel = new JPanel();
-               buttonPanel.setLayout(new FlowLayout(FlowLayout.CENTER));
-               _backButton = new JButton(I18nManager.getText("button.back"));
-               _backButton.addActionListener(new ActionListener() {
-                       public void actionPerformed(ActionEvent e)
-                       {
-                               _wizard.showPreviousCard();
-                               _nextButton.setEnabled(!_wizard.isLastCard());
-                               _backButton.setEnabled(!_wizard.isFirstCard());
-                               _finishButton.setEnabled(false);
-                       }
-               });
-               _backButton.setEnabled(false);
-               buttonPanel.add(_backButton);
-               _nextButton = new JButton(I18nManager.getText("button.next"));
-               _nextButton.addActionListener(new ActionListener() {
-                       public void actionPerformed(ActionEvent e)
-                       {
-                               prepareNextPanel(); // Maybe it needs to be initialized based on previous panels
-                               _wizard.showNextCard();
-                               _nextButton.setEnabled(!_wizard.isLastCard() && isCurrentCardValid());
-                               _backButton.setEnabled(!_wizard.isFirstCard());
-                               _finishButton.setEnabled(_wizard.isLastCard() && isCurrentCardValid());
-                       }
-               });
-               buttonPanel.add(_nextButton);
-               _finishButton = new JButton(I18nManager.getText("button.finish"));
-               _finishButton.addActionListener(new ActionListener() {
-                       public void actionPerformed(ActionEvent e)
-                       {
-                               finished();
-                       }
-               });
-               _finishButton.setEnabled(false);
-               buttonPanel.add(_finishButton);
-               JButton cancelButton = new JButton(I18nManager.getText("button.cancel"));
-               cancelButton.addActionListener(new ActionListener() {
-                       public void actionPerformed(ActionEvent e)
-                       {
-                               _dialog.dispose();
-                               _app.informNoDataLoaded();
-                       }
-               });
-               buttonPanel.add(cancelButton);
-               wholePanel.add(buttonPanel, BorderLayout.SOUTH);
-
-               // Make the card panel in the centre
-               JPanel cardPanel = new JPanel();
-               _wizard = new WizardLayout(cardPanel);
-               JPanel firstCard = new JPanel();
-               firstCard.setLayout(new BorderLayout());
-               firstCard.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 15));
-
-               JPanel delimsPanel = new JPanel();
-               delimsPanel.setLayout(new GridLayout(0, 2));
-               delimsPanel.add(new JLabel(I18nManager.getText("dialog.delimiter.label")));
-               delimsPanel.add(new JLabel("")); // blank label to go to next grid row
-               // radio buttons
-               _delimiterRadios = new JRadioButton[5];
-               _delimiterRadios[0] = new JRadioButton(I18nManager.getText("dialog.delimiter.comma"));
-               delimsPanel.add(_delimiterRadios[0]);
-               _delimiterRadios[1] = new JRadioButton(I18nManager.getText("dialog.delimiter.tab"));
-               delimsPanel.add(_delimiterRadios[1]);
-               _delimiterRadios[2] = new JRadioButton(I18nManager.getText("dialog.delimiter.semicolon"));
-               delimsPanel.add(_delimiterRadios[2]);
-               _delimiterRadios[3] = new JRadioButton(I18nManager.getText("dialog.delimiter.space"));
-               delimsPanel.add(_delimiterRadios[3]);
-               JPanel otherPanel = new JPanel();
-               otherPanel.setLayout(new FlowLayout(FlowLayout.LEFT, 0, 0));
-               _delimiterRadios[4] = new JRadioButton(I18nManager.getText("dialog.delimiter.other"));
-               otherPanel.add(_delimiterRadios[4]);
-               _otherDelimiterText = new JTextField(new OneCharDocument(), null, 2);
-               otherPanel.add(_otherDelimiterText);
-               // Group radio buttons
-               ButtonGroup delimGroup = new ButtonGroup();
-               DelimListener delimListener = new DelimListener();
-               for (int i=0; i<_delimiterRadios.length; i++)
-               {
-                       delimGroup.add(_delimiterRadios[i]);
-                       _delimiterRadios[i].addActionListener(delimListener);
-               }
-               _otherDelimiterText.getDocument().addDocumentListener(delimListener);
-               delimsPanel.add(new JLabel(""));
-               delimsPanel.add(otherPanel);
-               _statusLabel = new JLabel("");
-               delimsPanel.add(_statusLabel);
-               firstCard.add(delimsPanel, BorderLayout.SOUTH);
-               // load snippet to show first few lines
-               _snippetBox = new JList<String>(_fileCacher.getSnippet(SNIPPET_SIZE, MAX_SNIPPET_WIDTH));
-               _snippetBox.setEnabled(false);
-               firstCard.add(makeLabelledPanel("dialog.openoptions.filesnippet", _snippetBox), BorderLayout.CENTER);
-
-               // Second screen, for field order selection
-               JPanel secondCard = new JPanel();
-               secondCard.setLayout(new BorderLayout());
-               secondCard.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 15));
-               // table for file contents
-               _fileExtractTableModel = new FileExtractTableModel();
-               JTable extractTable = new JTable(_fileExtractTableModel);
-               JScrollPane tableScrollPane = new JScrollPane(extractTable);
-               extractTable.setPreferredScrollableViewportSize(new Dimension(350, 80));
-               extractTable.getTableHeader().setReorderingAllowed(false);
-               secondCard.add(makeLabelledPanel("dialog.openoptions.filesnippet", tableScrollPane), BorderLayout.NORTH);
-               JPanel innerPanel2 = new JPanel();
-               innerPanel2.setLayout(new BorderLayout());
-               innerPanel2.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
-
-               _fieldTable = new JTable(new FieldSelectionTableModel());
-               _fieldTable.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
-               // add listener for selected table row
-               _fieldTable.getSelectionModel().addListSelectionListener(
-                       new ListSelectionListener() {
-                               public void valueChanged(ListSelectionEvent e) {
-                                       ListSelectionModel lsm = (ListSelectionModel) e.getSource();
-                                       if (lsm.isSelectionEmpty()) {
-                                               //no rows are selected
-                                               selectField(-1);
-                                       } else {
-                                               selectField(lsm.getMinSelectionIndex());
-                                       }
-                               }
-                       });
-               JScrollPane lowerTablePane = new JScrollPane(_fieldTable);
-               lowerTablePane.setPreferredSize(new Dimension(300, 100));
-               innerPanel2.add(lowerTablePane, BorderLayout.CENTER);
-
-               JPanel innerPanel3 = new JPanel();
-               innerPanel3.setLayout(new BoxLayout(innerPanel3, BoxLayout.Y_AXIS));
-               _moveUpButton = new JButton(I18nManager.getText("button.moveup"));
-               _moveUpButton.addActionListener(new ActionListener() {
-                       public void actionPerformed(ActionEvent e)
-                       {
-                               int currRow = _fieldTable.getSelectedRow();
-                               closeTableComboBox(currRow);
-                               _fieldTableModel.moveUp(currRow);
-                               _fieldTable.setRowSelectionInterval(currRow-1, currRow-1);
-                       }
-               });
-               innerPanel3.add(_moveUpButton);
-               _moveDownButton = new JButton(I18nManager.getText("button.movedown"));
-               _moveDownButton.addActionListener(new ActionListener() {
-                       public void actionPerformed(ActionEvent e)
-                       {
-                               int currRow = _fieldTable.getSelectedRow();
-                               closeTableComboBox(currRow);
-                               _fieldTableModel.moveDown(currRow);
-                               _fieldTable.setRowSelectionInterval(currRow+1, currRow+1);
-                       }
-               });
-               innerPanel3.add(_moveDownButton);
-               innerPanel3.add(Box.createVerticalStrut(60));
-               JButton guessButton = new JButton(I18nManager.getText("button.guessfields"));
-               guessButton.addActionListener(new ActionListener() {
-                       public void actionPerformed(ActionEvent e)
-                       {
-                               _lastSelectedFields = null;
-                               prepareSecondPanel();
-                       }
-               });
-               innerPanel3.add(guessButton);
-
-               innerPanel2.add(innerPanel3, BorderLayout.EAST);
-               secondCard.add(innerPanel2, BorderLayout.CENTER);
-
-               // Third card, for units selection of altitude and speeds
-               JPanel thirdCard = new JPanel();
-               thirdCard.setLayout(new BorderLayout(10, 10));
-               JPanel holderPanel = new JPanel();
-               holderPanel.setLayout(new BoxLayout(holderPanel, BoxLayout.Y_AXIS));
-               // Altitude
-               JPanel altUnitsPanel = new JPanel();
-               GuiGridLayout altGrid = new GuiGridLayout(altUnitsPanel);
-               altUnitsPanel.setBorder(BorderFactory.createTitledBorder(I18nManager.getText("fieldname.altitude")));
-               JLabel altLabel = new JLabel(I18nManager.getText("dialog.openoptions.altitudeunits") + ": ");
-               altGrid.add(altLabel);
-               String[] altUnits = {I18nManager.getText("units.metres"), I18nManager.getText("units.feet")};
-               _altitudeUnitsDropdown = new JComboBox<String>(altUnits);
-               altGrid.add(_altitudeUnitsDropdown);
-               holderPanel.add(altUnitsPanel);
-               // Horizontal speed
-               JPanel speedPanel = new JPanel();
-               GuiGridLayout speedGrid = new GuiGridLayout(speedPanel);
-               speedPanel.setBorder(BorderFactory.createTitledBorder(I18nManager.getText("fieldname.speed")));
-               JLabel speedLabel = new JLabel(I18nManager.getText("dialog.openoptions.speedunits") + ": ");
-               speedGrid.add(speedLabel);
-               _hSpeedUnitsDropdown = new JComboBox<String>();
-               for (Unit spUnit : UnitSetLibrary.ALL_SPEED_UNITS) {
-                       _hSpeedUnitsDropdown.addItem(I18nManager.getText(spUnit.getNameKey()));
-               }
-               speedGrid.add(_hSpeedUnitsDropdown);
-               holderPanel.add(speedPanel);
-               // Vertical speed
-               JPanel vSpeedPanel = new JPanel();
-               GuiGridLayout vSpeedGrid = new GuiGridLayout(vSpeedPanel);
-               vSpeedPanel.setBorder(BorderFactory.createTitledBorder(I18nManager.getText("fieldname.verticalspeed")));
-               JLabel vSpeedLabel = new JLabel(I18nManager.getText("dialog.openoptions.vertspeedunits") + ": ");
-               vSpeedGrid.add(vSpeedLabel);
-               _vSpeedUnitsDropdown = new JComboBox<String>();
-               for (Unit spUnit : UnitSetLibrary.ALL_SPEED_UNITS) {
-                       _vSpeedUnitsDropdown.addItem(I18nManager.getText(spUnit.getNameKey()));
-               }
-               vSpeedGrid.add(_vSpeedUnitsDropdown);
-               final String vSpeedLabelText = I18nManager.getText("dialog.openoptions.vspeed.intro");
-               if (!vSpeedLabelText.isEmpty()) {
-                       vSpeedGrid.add(new JLabel(vSpeedLabelText));
-                       vSpeedGrid.add(new JLabel(""));
-               }
-               _vSpeedUpwardsRadio = new JRadioButton(I18nManager.getText("dialog.openoptions.vspeed.positiveup"));
-               JRadioButton vSpeedDownwardsRadio = new JRadioButton(I18nManager.getText("dialog.openoptions.vspeed.positivedown"));
-               ButtonGroup vSpeedDirGroup = new ButtonGroup();
-               vSpeedDirGroup.add(_vSpeedUpwardsRadio); vSpeedDirGroup.add(vSpeedDownwardsRadio);
-               vSpeedGrid.add(_vSpeedUpwardsRadio);     vSpeedGrid.add(vSpeedDownwardsRadio);
-               _vSpeedUpwardsRadio.setSelected(true);
-               holderPanel.add(vSpeedPanel);
-               thirdCard.add(holderPanel, BorderLayout.NORTH);
-
-               // Make a hider to show and hide the components according to the selected fields
-               _componentHider = new ComponentHider();
-               _componentHider.addComponent(altLabel, Field.ALTITUDE);
-               _componentHider.addComponent(_altitudeUnitsDropdown, Field.ALTITUDE);
-               _componentHider.addComponent(speedLabel, Field.SPEED);
-               _componentHider.addComponent(_hSpeedUnitsDropdown, Field.SPEED);
-               _componentHider.addComponent(vSpeedLabel, Field.VERTICAL_SPEED);
-               _componentHider.addComponent(_vSpeedUnitsDropdown, Field.VERTICAL_SPEED);
-               _componentHider.addComponent(_vSpeedUpwardsRadio, Field.VERTICAL_SPEED);
-               _componentHider.addComponent(vSpeedDownwardsRadio, Field.VERTICAL_SPEED);
-
-               // Add cards to the wizard
-               _wizard.addCard(firstCard);
-               _wizard.addCard(secondCard);
-               _wizard.addCard(thirdCard);
-
-               wholePanel.add(cardPanel, BorderLayout.CENTER);
-               return wholePanel;
-       }
-
-
-       /**
-        * Close the combo box on the selected row of the field table
-        * @param inRow currently selected row number
-        */
-       private void closeTableComboBox(int inRow)
-       {
-               TableCellEditor editor = _fieldTable.getCellEditor(inRow, 1);
-               if (editor != null)
-               {
-                       editor.stopCellEditing();
-               }
-       }
-
-
-       /**
-        * change the status based on selection of a delimiter
-        */
-       protected void informDelimiterSelected()
-       {
-               int fields = 0;
-               // Loop through radios to see which one is selected
-               for (int i=0; i<(_delimiterRadios.length-1); i++)
-               {
-                       if (_delimiterRadios[i].isSelected())
-                       {
-                               // Set label text to describe records and fields
-                               int numRecords = _delimiterInfos[i].getNumRecords();
-                               if (numRecords == 0)
-                               {
-                                       _statusLabel.setText(I18nManager.getText("dialog.openoptions.deliminfo.norecords"));
-                               }
-                               else
-                               {
-                                       fields = _delimiterInfos[i].getMaxFields();
-                                       _statusLabel.setText("" + numRecords + " " + I18nManager.getText("dialog.openoptions.deliminfo.records")
-                                               + " " + fields + " " + I18nManager.getText("dialog.openoptions.deliminfo.fields"));
-                               }
-                       }
-               }
-               // Don't show label if "other" delimiter is chosen (as records, fields are unknown)
-               if (_delimiterRadios[_delimiterRadios.length-1].isSelected())
-               {
-                       _statusLabel.setText("");
-               }
-               // enable/disable next button
-               _nextButton.setEnabled((_delimiterRadios[4].isSelected() == false && fields > 1)
-                       || _otherDelimiterText.getText().length() == 1);
-       }
-
-
-       /**
-        * Get the delimiter info from the first step
-        * @return delimiter information object for the selected delimiter
-        */
-       public DelimiterInfo getSelectedDelimiterInfo()
-       {
-               for (int i=0; i<4; i++)
-                       if (_delimiterRadios[i].isSelected()) return _delimiterInfos[i];
-               // must be "other" - build info if necessary
-               if (_delimiterInfos[4] == null)
-                       _delimiterInfos[4] = new DelimiterInfo(_otherDelimiterText.getText().charAt(0));
-               return _delimiterInfos[4];
-       }
-
-
-       /**
-        * Prepare the next panel to be shown, if necessary
-        */
-       private void prepareNextPanel()
-       {
-               int currPanel = _wizard.getCurrentCardIndex();
-               if (currPanel == 0) {
-                       prepareSecondPanel();
-               }
-               else if (currPanel == 1)
-               {
-                       Field[] selectedFields = _fieldTableModel.getFieldArray();
-                       // Enable / disable controls based on whether altitude / speed / vspeed fields were chosen on second panel
-                       _componentHider.enableComponents(Field.ALTITUDE, doesFieldArrayContain(selectedFields, Field.ALTITUDE));
-                       _componentHider.enableComponents(Field.SPEED, doesFieldArrayContain(selectedFields, Field.SPEED));
-                       _componentHider.enableComponents(Field.VERTICAL_SPEED, doesFieldArrayContain(selectedFields, Field.VERTICAL_SPEED));
-                       // TODO: Also check ranges of altitudes, speeds, vert speeds to show them in the third panel
-               }
-       }
-
-       /**
-        * Use the delimiter selected to determine the fields in the file
-        * and prepare the second panel accordingly
-        */
-       private void prepareSecondPanel()
-       {
-               DelimiterInfo info = getSelectedDelimiterInfo();
-               FileSplitter splitter = new FileSplitter(_fileCacher);
-               // Check info makes sense - num fields > 0, num records > 0
-               // set "Finished" button to disabled if not ok
-               // Add data to GUI elements
-               String[][] tableData = splitter.splitFieldData(info.getDelimiter());
-               // possible to ignore blank columns here
-               _currentDelimiter = info.getDelimiter();
-               _fileExtractTableModel.updateData(tableData);
-               _fieldTableModel = new FieldSelectionTableModel();
-
-               // Check number of fields and use last ones if count matches
-               Field[] startFieldArray = null;
-               if (_lastSelectedFields != null && splitter.getNumColumns() == _lastSelectedFields.length)
-               {
-                       startFieldArray = _lastSelectedFields;
-               }
-               else
-               {
-                       // Take first full row of file and use it to guess fields
-                       startFieldArray = FieldGuesser.guessFields(splitter.getFirstFullRow());
-               }
-
-               _fieldTableModel.updateData(startFieldArray);
-               _fieldTable.setModel(_fieldTableModel);
-               // add dropdowns to second column
-               JComboBox<String> fieldTypesBox = new JComboBox<String>();
-               String[] fieldNames = Field.getFieldNames();
-               for (int i=0; i<fieldNames.length; i++)
-               {
-                       fieldTypesBox.addItem(fieldNames[i]);
-               }
-               _fieldTable.getColumnModel().getColumn(1).setCellEditor(new DefaultCellEditor(fieldTypesBox));
-
-               // Set altitude format to same as last time if available
-               if (_lastAltitudeUnit == UnitSetLibrary.UNITS_METRES)
-                       _altitudeUnitsDropdown.setSelectedIndex(0);
-               else if (_lastAltitudeUnit == UnitSetLibrary.UNITS_FEET)
-                       _altitudeUnitsDropdown.setSelectedIndex(1);
-               // no selection on field list
-               selectField(-1);
-       }
-
-       /**
-        * See if the given array of selected fields contains the specified one
-        * @param inFields array of fields selected by user in the second panel
-        * @param inCheck field to check
-        * @return true if the field is present in the array
-        */
-       private boolean doesFieldArrayContain(Field[] inFields, Field inCheck)
-       {
-               if (inFields != null) {
-                       for (int i=0; i<inFields.length; i++) {
-                               if (inFields[i] == inCheck) { // == check ok here because it only checks for built-in fields
-                                       return true;
-                               }
-                       }
-               }
-               return false;
-       }
-
-       /**
-        * All options have been selected, so load file
-        */
-       private void finished()
-       {
-               // Save delimiter, field array and altitude format for later use
-               _lastUsedDelimiter = _currentDelimiter;
-               _lastSelectedFields = _fieldTableModel.getFieldArray();
-               // TODO: Remember all the units selections for next load?
-               // Get the selected units for altitudes and speeds
-               SourceInfo sourceInfo = new SourceInfo(_file, SourceInfo.FILE_TYPE.TEXT);
-               PointCreateOptions options = new PointCreateOptions();
-               options.setAltitudeUnits(_altitudeUnitsDropdown.getSelectedIndex() == 0 ? UnitSetLibrary.UNITS_METRES : UnitSetLibrary.UNITS_FEET);
-               Unit hSpeedUnit = UnitSetLibrary.ALL_SPEED_UNITS[_hSpeedUnitsDropdown.getSelectedIndex()];
-               options.setSpeedUnits(hSpeedUnit);
-               Unit vSpeedUnit = UnitSetLibrary.ALL_SPEED_UNITS[_vSpeedUnitsDropdown.getSelectedIndex()];
-               options.setVerticalSpeedUnits(vSpeedUnit, _vSpeedUpwardsRadio.isSelected());
-
-               // give data to App
-               _app.informDataLoaded(_fieldTableModel.getFieldArray(),
-                       _fileExtractTableModel.getData(), options, sourceInfo, null);
-               // clear up file cacher
-               _fileCacher.clear();
-               // dispose of dialog
-               _dialog.dispose();
-       }
-
-       /**
-        * @return true if the inputs on the current tab are valid, user is allowed to proceed
-        */
-       private boolean isCurrentCardValid()
-       {
-               int cardIndex = _wizard.getCurrentCardIndex();
-               if (cardIndex == 1)
-               {
-                       // validate second panel
-                       return _fieldTableModel.getRowCount() > 1;
-               }
-               // all other panels are always valid
-               return true;
-       }
-
-       /**
-        * Make a panel with a label and a component
-        * @param inLabelKey label key to use
-        * @param inComponent component for main area of panel
-        * @return labelled Panel
-        */
-       private static JPanel makeLabelledPanel(String inLabelKey, JComponent inComponent)
-       {
-               JPanel panel = new JPanel();
-               panel.setLayout(new BorderLayout());
-               panel.add(new JLabel(I18nManager.getText(inLabelKey)), BorderLayout.NORTH);
-               panel.add(inComponent, BorderLayout.CENTER);
-               return panel;
-       }
-
-
-       /**
-        * An entry in the field list has been selected
-        * @param inFieldNum index of field, starting with 0
-        */
-       private void selectField(int inFieldNum)
-       {
-               if (inFieldNum == -1 || inFieldNum != _selectedField)
-               {
-                       _selectedField = inFieldNum;
-                       _moveUpButton.setEnabled(inFieldNum > 0);
-                       _moveDownButton.setEnabled(inFieldNum >= 0
-                               && inFieldNum < (_fieldTableModel.getRowCount()-1));
-               }
-       }
-
-
-       /**
-        * @return the last delimiter character used for a load
-        */
-       public char getLastUsedDelimiter()
-       {
-               return _lastUsedDelimiter;
-       }
-}