src/tim/prune/gui/map/MapCanvas.java

   1 package tim.prune.gui.map;
   2
   3 import java.awt.*;
   4 import java.awt.event.*;
   5 import java.awt.image.BufferedImage;
   6
   7 import javax.swing.*;
   8 import javax.swing.event.ChangeEvent;
   9 import javax.swing.event.ChangeListener;
  10
  11 import tim.prune.App;
  12 import tim.prune.DataSubscriber;
  13 import tim.prune.FunctionLibrary;
  14 import tim.prune.I18nManager;
  15 import tim.prune.UpdateMessageBroker;
  16 import tim.prune.config.ColourScheme;
  17 import tim.prune.config.Config;
  18 import tim.prune.data.*;
  19 import tim.prune.function.compress.MarkPointsInRectangleFunction;
  20 import tim.prune.function.edit.FieldEdit;
  21 import tim.prune.function.edit.FieldEditList;
  22 import tim.prune.gui.IconManager;
  23 import tim.prune.gui.MultiStateCheckBox;
  24 import tim.prune.gui.colour.PointColourer;
  25 import tim.prune.tips.TipManager;
  26
  27 /**
  28  * Class for the map canvas, to display a background map and draw on it
  29  */
  30 public class MapCanvas extends JPanel implements MouseListener, MouseMotionListener, DataSubscriber,
  31         KeyListener, MouseWheelListener, TileConsumer
  32 {
  33         /** App object for callbacks */
  34         private App _app = null;
  35         /** Track object */
  36         private Track _track = null;
  37         /** TrackInfo object */
  38         private TrackInfo _trackInfo = null;
  39         /** Selection object */
  40         private Selection _selection = null;
  41         /** Object to keep track of midpoints */
  42         private MidpointData _midpoints = null;
  43         /** Index of point clicked at mouseDown */
  44         private int _clickedPoint = -1;
  45         /** Previously selected point */
  46         private int _prevSelectedPoint = -1;
  47         /** Tile manager */
  48         private MapTileManager _tileManager = new MapTileManager(this);
  49         /** Image to display */
  50         private BufferedImage _mapImage = null;
  51         /** Second image for drawing track (only needed for alpha blending) */
  52         private BufferedImage _trackImage = null;
  53         /** Slider for transparency */
  54         private JSlider _transparencySlider = null;
  55         /** Checkbox for scale bar */
  56         private JCheckBox _scaleCheckBox = null;
  57         /** Checkbox for maps */
  58         private JCheckBox _mapCheckBox = null;
  59         /** Checkbox for autopan */
  60         private JCheckBox _autopanCheckBox = null;
  61         /** Checkbox for connecting track points */
  62         private MultiStateCheckBox _connectCheckBox = null;
  63         /** Checkbox for enable edit mode */
  64         private JCheckBox _editmodeCheckBox = null;
  65         /** Right-click popup menu */
  66         private JPopupMenu _popup = null;
  67         /** Top component panel */
  68         private JPanel _topPanel = null;
  69         /** Side component panel */
  70         private JPanel _sidePanel = null;
  71         /** Scale bar */
  72         private ScaleBar _scaleBar = null;
  73         /* Data */
  74         private DoubleRange _latRange = null, _lonRange = null;
  75         private DoubleRange _xRange = null, _yRange = null;
  76         private boolean _recalculate = false;
  77         /** Flag to check bounds on next paint */
  78         private boolean _checkBounds = false;
  79         /** Map position */
  80         private MapPosition _mapPosition = null;
  81         /** coordinates of drag from point */
  82         private int _dragFromX = -1, _dragFromY = -1;
  83         /** coordinates of drag to point */
  84         private int _dragToX = -1, _dragToY = -1;
  85         /** coordinates of popup menu */
  86         private int _popupMenuX = -1, _popupMenuY = -1;
  87         /** Flag to prevent showing too often the error message about loading maps */
  88         private boolean _shownMapLoadErrorAlready = false;
  89         /** Current drawing mode */
  90         private int _drawMode = MODE_DEFAULT;
  91         /** Current waypoint icon definition */
  92         WpIconDefinition _waypointIconDefinition = null;
  93
  94         /** Constant for click sensitivity when selecting nearest point */
  95         private static final int CLICK_SENSITIVITY = 10;
  96         /** Constant for pan distance from key presses */
  97         private static final int PAN_DISTANCE = 20;
  98         /** Constant for pan distance from autopan */
  99         private static final int AUTOPAN_DISTANCE = 75;
 100
 101         // Colours
 102         private static final Color COLOR_MESSAGES   = Color.GRAY;
 103
 104         // Drawing modes
 105         private static final int MODE_DEFAULT = 0;
 106         private static final int MODE_ZOOM_RECT = 1;
 107         private static final int MODE_DRAW_POINTS_START = 2;
 108         private static final int MODE_DRAW_POINTS_CONT = 3;
 109         private static final int MODE_DRAG_POINT = 4;
 110         private static final int MODE_CREATE_MIDPOINT = 5;
 111         private static final int MODE_MARK_RECTANGLE = 6;
 112
 113         private static final int INDEX_UNKNOWN  = -2;
 114
 115
 116         /**
 117          * Constructor
 118          * @param inApp App object for callbacks
 119          * @param inTrackInfo track info object
 120          */
 121         public MapCanvas(App inApp, TrackInfo inTrackInfo)
 122         {
 123                 _app = inApp;
 124                 _trackInfo = inTrackInfo;
 125                 _track = inTrackInfo.getTrack();
 126                 _selection = inTrackInfo.getSelection();
 127                 _midpoints = new MidpointData();
 128                 _mapPosition = new MapPosition();
 129                 addMouseListener(this);
 130                 addMouseMotionListener(this);
 131                 addMouseWheelListener(this);
 132                 addKeyListener(this);
 133
 134                 // Make listener for changes to controls
 135                 ItemListener itemListener = new ItemListener() {
 136                         public void itemStateChanged(ItemEvent e)
 137                         {
 138                                 _recalculate = true;
 139                                 repaint();
 140                         }
 141                 };
 142                 // Make special listener for changes to map checkbox
 143                 ItemListener mapCheckListener = new ItemListener() {
 144                         public void itemStateChanged(ItemEvent e)
 145                         {
 146                                 _tileManager.clearMemoryCaches();
 147                                 _recalculate = true;
 148                                 Config.setConfigBoolean(Config.KEY_SHOW_MAP, e.getStateChange() == ItemEvent.SELECTED);
 149                                 UpdateMessageBroker.informSubscribers(); // to let menu know
 150                                 // If the track is only partially visible and you turn the map off, make the track fully visible again
 151                                 if (e.getStateChange() == ItemEvent.DESELECTED && _transparencySlider.getValue() < 0) {
 152                                         _transparencySlider.setValue(0);
 153                                 }
 154                         }
 155                 };
 156                 _topPanel = new OverlayPanel();
 157                 _topPanel.setLayout(new FlowLayout());
 158                 // Make slider for transparency
 159                 _transparencySlider = new JSlider(-6, 6, 0);
 160                 _transparencySlider.setPreferredSize(new Dimension(100, 20));
 161                 _transparencySlider.setMajorTickSpacing(1);
 162                 _transparencySlider.setSnapToTicks(true);
 163                 _transparencySlider.setOpaque(false);
 164                 _transparencySlider.setValue(0);
 165                 _transparencySlider.addChangeListener(new ChangeListener() {
 166                         public void stateChanged(ChangeEvent e)
 167                         {
 168                                 int val = _transparencySlider.getValue();
 169                                 if (val == 1 || val == -1)
 170                                         _transparencySlider.setValue(0);
 171                                 else {
 172                                         _recalculate = true;
 173                                         repaint();
 174                                 }
 175                         }
 176                 });
 177                 _transparencySlider.setFocusable(false); // stop slider from stealing keyboard focus
 178                 _topPanel.add(_transparencySlider);
 179                 // Add checkbox button for enabling scale bar
 180                 _scaleCheckBox = new JCheckBox(IconManager.getImageIcon(IconManager.SCALEBAR_BUTTON), true);
 181                 _scaleCheckBox.setSelectedIcon(IconManager.getImageIcon(IconManager.SCALEBAR_BUTTON_ON));
 182                 _scaleCheckBox.setOpaque(false);
 183                 _scaleCheckBox.setToolTipText(I18nManager.getText("menu.map.showscalebar"));
 184                 _scaleCheckBox.addItemListener(new ItemListener() {
 185                         public void itemStateChanged(ItemEvent e) {
 186                                 _scaleBar.setVisible(_scaleCheckBox.isSelected());
 187                         }
 188                 });
 189                 _scaleCheckBox.setFocusable(false); // stop button from stealing keyboard focus
 190                 _topPanel.add(_scaleCheckBox);
 191                 // Add checkbox button for enabling maps or not
 192                 _mapCheckBox = new JCheckBox(IconManager.getImageIcon(IconManager.MAP_BUTTON), false);
 193                 _mapCheckBox.setSelectedIcon(IconManager.getImageIcon(IconManager.MAP_BUTTON_ON));
 194                 _mapCheckBox.setOpaque(false);
 195                 _mapCheckBox.setToolTipText(I18nManager.getText("menu.map.showmap"));
 196                 _mapCheckBox.addItemListener(mapCheckListener);
 197                 _mapCheckBox.setFocusable(false); // stop button from stealing keyboard focus
 198                 _topPanel.add(_mapCheckBox);
 199                 // Add checkbox button for enabling autopan or not
 200                 _autopanCheckBox = new JCheckBox(IconManager.getImageIcon(IconManager.AUTOPAN_BUTTON), true);
 201                 _autopanCheckBox.setSelectedIcon(IconManager.getImageIcon(IconManager.AUTOPAN_BUTTON_ON));
 202                 _autopanCheckBox.setOpaque(false);
 203                 _autopanCheckBox.setToolTipText(I18nManager.getText("menu.map.autopan"));
 204                 _autopanCheckBox.addItemListener(itemListener);
 205                 _autopanCheckBox.setFocusable(false); // stop button from stealing keyboard focus
 206                 _topPanel.add(_autopanCheckBox);
 207                 // Add checkbox button for connecting points or not
 208                 _connectCheckBox = new MultiStateCheckBox(4);
 209                 _connectCheckBox.setIcon(0, IconManager.getImageIcon(IconManager.POINTS_WITH_ARROWS_BUTTON));
 210                 _connectCheckBox.setIcon(1, IconManager.getImageIcon(IconManager.POINTS_HIDDEN_BUTTON));
 211                 _connectCheckBox.setIcon(2, IconManager.getImageIcon(IconManager.POINTS_CONNECTED_BUTTON));
 212                 _connectCheckBox.setIcon(3, IconManager.getImageIcon(IconManager.POINTS_DISCONNECTED_BUTTON));
 213                 _connectCheckBox.setCurrentState(0);
 214                 _connectCheckBox.setOpaque(false);
 215                 _connectCheckBox.setToolTipText(I18nManager.getText("menu.map.connect"));
 216                 _connectCheckBox.addItemListener(itemListener);
 217                 _connectCheckBox.setFocusable(false); // stop button from stealing keyboard focus
 218                 _topPanel.add(_connectCheckBox);
 219
 220                 // Add checkbox button for edit mode or not
 221                 _editmodeCheckBox = new JCheckBox(IconManager.getImageIcon(IconManager.EDIT_MODE_BUTTON), false);
 222                 _editmodeCheckBox.setSelectedIcon(IconManager.getImageIcon(IconManager.EDIT_MODE_BUTTON_ON));
 223                 _editmodeCheckBox.setOpaque(false);
 224                 _editmodeCheckBox.setToolTipText(I18nManager.getText("menu.map.editmode"));
 225                 _editmodeCheckBox.addItemListener(itemListener);
 226                 _editmodeCheckBox.setFocusable(false); // stop button from stealing keyboard focus
 227                 _topPanel.add(_editmodeCheckBox);
 228
 229                 // Add zoom in, zoom out buttons
 230                 _sidePanel = new OverlayPanel();
 231                 _sidePanel.setLayout(new BoxLayout(_sidePanel, BoxLayout.Y_AXIS));
 232                 JButton zoomInButton = new JButton(IconManager.getImageIcon(IconManager.ZOOM_IN_BUTTON));
 233                 zoomInButton.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
 234                 zoomInButton.setContentAreaFilled(false);
 235                 zoomInButton.setToolTipText(I18nManager.getText("menu.map.zoomin"));
 236                 zoomInButton.addActionListener(new ActionListener() {
 237                         public void actionPerformed(ActionEvent e)
 238                         {
 239                                 zoomIn();
 240                         }
 241                 });
 242                 zoomInButton.setFocusable(false); // stop button from stealing keyboard focus
 243                 _sidePanel.add(zoomInButton);
 244                 JButton zoomOutButton = new JButton(IconManager.getImageIcon(IconManager.ZOOM_OUT_BUTTON));
 245                 zoomOutButton.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
 246                 zoomOutButton.setContentAreaFilled(false);
 247                 zoomOutButton.setToolTipText(I18nManager.getText("menu.map.zoomout"));
 248                 zoomOutButton.addActionListener(new ActionListener() {
 249                         public void actionPerformed(ActionEvent e)
 250                         {
 251                                 zoomOut();
 252                         }
 253                 });
 254                 zoomOutButton.setFocusable(false); // stop button from stealing keyboard focus
 255                 _sidePanel.add(zoomOutButton);
 256
 257                 // Bottom panel for scale bar
 258                 _scaleBar = new ScaleBar();
 259
 260                 // add control panels to this one
 261                 setLayout(new BorderLayout());
 262                 _topPanel.setVisible(false);
 263                 _sidePanel.setVisible(false);
 264                 add(_topPanel, BorderLayout.NORTH);
 265                 add(_sidePanel, BorderLayout.WEST);
 266                 add(_scaleBar, BorderLayout.SOUTH);
 267                 // Make popup menu
 268                 makePopup();
 269                 // Get currently selected map from Config, pass to MapTileManager
 270                 _tileManager.setMapSource(Config.getConfigInt(Config.KEY_MAPSOURCE_INDEX));
 271                 // Update display settings
 272                 dataUpdated(MAPSERVER_CHANGED);
 273         }
 274
 275
 276         /**
 277          * Make the popup menu for right-clicking the map
 278          */
 279         private void makePopup()
 280         {
 281                 _popup = new JPopupMenu();
 282                 JMenuItem zoomInItem = new JMenuItem(I18nManager.getText("menu.map.zoomin"));
 283                 zoomInItem.addActionListener(new ActionListener() {
 284                         public void actionPerformed(ActionEvent e)
 285                         {
 286                                 panMap((_popupMenuX - getWidth()/2)/2, (_popupMenuY - getHeight()/2)/2);
 287                                 zoomIn();
 288                         }});
 289                 _popup.add(zoomInItem);
 290                 JMenuItem zoomOutItem = new JMenuItem(I18nManager.getText("menu.map.zoomout"));
 291                 zoomOutItem.addActionListener(new ActionListener() {
 292                         public void actionPerformed(ActionEvent e)
 293                         {
 294                                 panMap(-(_popupMenuX - getWidth()/2), -(_popupMenuY - getHeight()/2));
 295                                 zoomOut();
 296                         }});
 297                 _popup.add(zoomOutItem);
 298                 JMenuItem zoomFullItem = new JMenuItem(I18nManager.getText("menu.map.zoomfull"));
 299                 zoomFullItem.addActionListener(new ActionListener() {
 300                         public void actionPerformed(ActionEvent e)
 301                         {
 302                                 zoomToFit();
 303                                 _recalculate = true;
 304                                 repaint();
 305                         }});
 306                 _popup.add(zoomFullItem);
 307                 _popup.addSeparator();
 308                 // Set background
 309                 JMenuItem setMapBgItem = new JMenuItem(
 310                         I18nManager.getText(FunctionLibrary.FUNCTION_SET_MAP_BG.getNameKey()));
 311                 setMapBgItem.addActionListener(new ActionListener() {
 312                         public void actionPerformed(ActionEvent e)
 313                         {
 314                                 FunctionLibrary.FUNCTION_SET_MAP_BG.begin();
 315                         }});
 316                 _popup.add(setMapBgItem);
 317                 // new point option
 318                 JMenuItem newPointItem = new JMenuItem(I18nManager.getText("menu.map.newpoint"));
 319                 newPointItem.addActionListener(new ActionListener() {
 320                         public void actionPerformed(ActionEvent e)
 321                         {
 322                                 _app.createPoint(createPointFromClick(_popupMenuX, _popupMenuY));
 323                         }});
 324                 _popup.add(newPointItem);
 325                 // draw point series
 326                 JMenuItem drawPointsItem = new JMenuItem(I18nManager.getText("menu.map.drawpoints"));
 327                 drawPointsItem.addActionListener(new ActionListener() {
 328                         public void actionPerformed(ActionEvent e)
 329                         {
 330                                 _drawMode = MODE_DRAW_POINTS_START;
 331                         }
 332                 });
 333                 _popup.add(drawPointsItem);
 334         }
 335
 336
 337         /**
 338          * Zoom to fit the current data area
 339          */
 340         private void zoomToFit()
 341         {
 342                 if (_track.getNumPoints() > 0)
 343                 {
 344                         _latRange = _track.getLatRange();
 345                         _lonRange = _track.getLonRange();
 346                 }
 347                 if (_latRange == null || _lonRange == null
 348                         || !_latRange.hasData() || !_lonRange.hasData())
 349                 {
 350                         setDefaultLatLonRange();
 351                 }
 352                 _xRange = new DoubleRange(MapUtils.getXFromLongitude(_lonRange.getMinimum()),
 353                         MapUtils.getXFromLongitude(_lonRange.getMaximum()));
 354                 _yRange = new DoubleRange(MapUtils.getYFromLatitude(_latRange.getMinimum()),
 355                         MapUtils.getYFromLatitude(_latRange.getMaximum()));
 356                 _mapPosition.zoomToXY(_xRange.getMinimum(), _xRange.getMaximum(), _yRange.getMinimum(), _yRange.getMaximum(),
 357                         getWidth(), getHeight());
 358         }
 359
 360         /**
 361          * Track data is empty, so find a default area on the map to show
 362          */
 363         private void setDefaultLatLonRange()
 364         {
 365                 String storedRange = Config.getConfigString(Config.KEY_LATLON_RANGE);
 366                 // Parse it into four latlon values
 367                 try
 368                 {
 369                         String[] values = storedRange.split(";");
 370                         if (values.length == 4)
 371                         {
 372                                 final double lat1 = Double.valueOf(values[0]);
 373                                 final double lat2 = Double.valueOf(values[1]);
 374                                 if (lat1 >= -90.0 && lat1 <= 90.0 && lat2 >= -90.0 && lat2 <= 90.0 && lat1 != lat2)
 375                                 {
 376                                         _latRange = new DoubleRange(lat1, lat2);
 377                                         final double lon1 = Double.valueOf(values[2]);
 378                                         final double lon2 = Double.valueOf(values[3]);
 379                                         if (lon1 >= -180.0 && lon1 <= 180.0 && lon2 >= -180.0 && lon2 <= 180.0 && lon1 != lon2)
 380                                         {
 381                                                 _lonRange = new DoubleRange(lon1, lon2);
 382                                                 return;
 383                                         }
 384                                 }
 385                         }
 386                 }
 387                 catch (Exception e) {}
 388                 _latRange = new DoubleRange(45.8, 47.9);
 389                 _lonRange = new DoubleRange(5.9, 10.6);
 390         }
 391
 392         /**
 393          * Paint method
 394          * @see java.awt.Canvas#paint(java.awt.Graphics)
 395          */
 396         public void paint(Graphics inG)
 397         {
 398                 super.paint(inG);
 399                 if (_mapImage != null && (_mapImage.getWidth() != getWidth() || _mapImage.getHeight() != getHeight())) {
 400                         _mapImage = null;
 401                 }
 402                 final boolean showMap = Config.getConfigBoolean(Config.KEY_SHOW_MAP);
 403                 final boolean showSomething = _track.getNumPoints() > 0 || showMap;
 404                 if (showSomething)
 405                 {
 406                         // Check for autopan if enabled / necessary
 407                         if (_autopanCheckBox.isSelected())
 408                         {
 409                                 int selectedPoint = _selection.getCurrentPointIndex();
 410                                 if (selectedPoint >= 0 && _dragFromX == -1 && selectedPoint != _prevSelectedPoint)
 411                                 {
 412                                         autopanToPoint(selectedPoint);
 413                                 }
 414                                 _prevSelectedPoint = selectedPoint;
 415                         }
 416
 417                         // Recognise empty map position, if no data has been loaded
 418                         if (_mapPosition.isEmpty())
 419                         {
 420                                 // Set to some default area
 421                                 zoomToFit();
 422                                 _recalculate = true;
 423                         }
 424
 425                         // Draw the map contents if necessary
 426                         if (_mapImage == null || _recalculate)
 427                         {
 428                                 paintMapContents();
 429                                 _scaleBar.updateScale(_mapPosition.getZoom(), _mapPosition.getYFromPixels(0, 0));
 430                         }
 431                         // Draw the prepared image onto the panel
 432                         if (_mapImage != null) {
 433                                 inG.drawImage(_mapImage, 0, 0, getWidth(), getHeight(), null);
 434                         }
 435
 436                         switch (_drawMode)
 437                         {
 438                                 case MODE_DRAG_POINT:
 439                                         drawDragLines(inG, _selection.getCurrentPointIndex()-1, _selection.getCurrentPointIndex()+1);
 440                                         break;
 441
 442                                 case MODE_CREATE_MIDPOINT:
 443                                         drawDragLines(inG, _clickedPoint-1, _clickedPoint);
 444                                         break;
 445
 446                                 case MODE_ZOOM_RECT:
 447                                 case MODE_MARK_RECTANGLE:
 448                                         if (_dragFromX != -1 && _dragFromY != -1)
 449                                         {
 450                                                 // Draw the zoom rectangle if necessary
 451                                                 inG.setColor(Color.RED);
 452                                                 inG.drawLine(_dragFromX, _dragFromY, _dragFromX, _dragToY);
 453                                                 inG.drawLine(_dragFromX, _dragFromY, _dragToX, _dragFromY);
 454                                                 inG.drawLine(_dragToX, _dragFromY, _dragToX, _dragToY);
 455                                                 inG.drawLine(_dragFromX, _dragToY, _dragToX, _dragToY);
 456                                         }
 457                                         break;
 458
 459                                 case MODE_DRAW_POINTS_CONT:
 460                                         // draw line to mouse position to show drawing mode
 461                                         inG.setColor(Config.getColourScheme().getColour(ColourScheme.IDX_POINT));
 462                                         int prevIndex = _track.getNumPoints()-1;
 463                                         int px = getWidth() / 2 + _mapPosition.getXFromCentre(_track.getX(prevIndex));
 464                                         int py = getHeight() / 2 + _mapPosition.getYFromCentre(_track.getY(prevIndex));
 465                                         inG.drawLine(px, py, _dragToX, _dragToY);
 466                                         break;
 467                         }
 468                 }
 469                 else
 470                 {
 471                         inG.setColor(Config.getColourScheme().getColour(ColourScheme.IDX_BACKGROUND));
 472                         inG.fillRect(0, 0, getWidth(), getHeight());
 473                         inG.setColor(COLOR_MESSAGES);
 474                         inG.drawString(I18nManager.getText("display.nodata"), 50, getHeight()/2);
 475                         _scaleBar.updateScale(-1, 0);
 476                 }
 477                 // enable or disable panels
 478                 _topPanel.setVisible(showSomething);
 479                 _sidePanel.setVisible(showSomething);
 480                 // Draw slider etc on top
 481                 paintChildren(inG);
 482         }
 483
 484         /**
 485          * @return true if the currently selected point is visible, false if off-screen or nothing selected
 486          */
 487         private boolean isCurrentPointVisible()
 488         {
 489                 if (_trackInfo.getCurrentPoint() == null) {return false;}
 490                 final int selectedPoint = _selection.getCurrentPointIndex();
 491                 final int xFromCentre = Math.abs(_mapPosition.getXFromCentre(_track.getX(selectedPoint)));
 492                 if (xFromCentre > (getWidth()/2)) {return false;}
 493                 final int yFromCentre = Math.abs(_mapPosition.getYFromCentre(_track.getY(selectedPoint)));
 494                 return yFromCentre < (getHeight()/2);
 495         }
 496
 497         /**
 498          * If the specified point isn't visible, pan to it
 499          * @param inIndex index of selected point
 500          */
 501         private void autopanToPoint(int inIndex)
 502         {
 503                 int px = getWidth() / 2 + _mapPosition.getXFromCentre(_track.getX(inIndex));
 504                 int py = getHeight() / 2 + _mapPosition.getYFromCentre(_track.getY(inIndex));
 505                 int panX = 0;
 506                 int panY = 0;
 507                 if (px < PAN_DISTANCE) {
 508                         panX = px - AUTOPAN_DISTANCE;
 509                 }
 510                 else if (px > (getWidth()-PAN_DISTANCE)) {
 511                         panX = AUTOPAN_DISTANCE + px - getWidth();
 512                 }
 513                 if (py < (2*PAN_DISTANCE)) {
 514                         panY = py - AUTOPAN_DISTANCE;
 515                 }
 516                 if (py > (getHeight()-PAN_DISTANCE)) {
 517                         panY = AUTOPAN_DISTANCE + py - getHeight();
 518                 }
 519                 if (panX != 0 || panY != 0) {
 520                         _mapPosition.pan(panX, panY);
 521                 }
 522         }
 523
 524         /**
 525          * Paint the map tiles and the points on to the _mapImage
 526          */
 527         private void paintMapContents()
 528         {
 529                 if (_mapImage == null || _mapImage.getWidth() != getWidth() || _mapImage.getHeight() != getHeight())
 530                 {
 531                         _mapImage = new BufferedImage(getWidth(), getHeight(), BufferedImage.TYPE_INT_RGB);
 532                 }
 533
 534                 Graphics g = _mapImage.getGraphics();
 535                 // Set antialiasing according to config
 536                 ((Graphics2D) g).setRenderingHint(RenderingHints.KEY_ANTIALIASING,
 537                         Config.getConfigBoolean(Config.KEY_ANTIALIAS) ? RenderingHints.VALUE_ANTIALIAS_ON : RenderingHints.VALUE_ANTIALIAS_OFF);
 538                 // Clear to background
 539                 g.setColor(Config.getColourScheme().getColour(ColourScheme.IDX_BACKGROUND));
 540                 g.fillRect(0, 0, getWidth(), getHeight());
 541
 542                 // Check whether maps are on or not
 543                 final boolean showMap = Config.getConfigBoolean(Config.KEY_SHOW_MAP);
 544                 _mapCheckBox.setSelected(showMap);
 545                 // Check whether disk cache is on or not
 546                 final boolean usingDiskCache = Config.getConfigString(Config.KEY_DISK_CACHE) != null;
 547                 // Show tip to recommend setting up a cache
 548                 if (showMap && !usingDiskCache && Config.getConfigBoolean(Config.KEY_ONLINE_MODE))
 549                 {
 550                         SwingUtilities.invokeLater(new Runnable() {
 551                                 public void run() {
 552                                         _app.showTip(TipManager.Tip_UseAMapCache);
 553                                 }
 554                         });
 555                 }
 556
 557                 // reset error message
 558                 if (!showMap) {_shownMapLoadErrorAlready = false;}
 559                 _recalculate = false;
 560                 // Only get map tiles if selected
 561                 if (showMap)
 562                 {
 563                         // init tile cacher
 564                         _tileManager.centreMap(_mapPosition.getZoom(), _mapPosition.getCentreTileX(), _mapPosition.getCentreTileY());
 565
 566                         boolean loadingFailed = false;
 567                         if (_mapImage == null) return;
 568
 569                         if (_tileManager.isOverzoomed())
 570                         {
 571                                 // display overzoom message
 572                                 g.setColor(COLOR_MESSAGES);
 573                                 g.drawString(I18nManager.getText("map.overzoom"), 50, getHeight()/2);
 574                         }
 575                         else
 576                         {
 577                                 int numLayers = _tileManager.getNumLayers();
 578                                 // Loop over tiles drawing each one
 579                                 int[] tileIndices = _mapPosition.getTileIndices(getWidth(), getHeight());
 580                                 int[] pixelOffsets = _mapPosition.getDisplayOffsets(getWidth(), getHeight());
 581                                 for (int tileX = tileIndices[0]; tileX <= tileIndices[1] && !loadingFailed; tileX++)
 582                                 {
 583                                         int x = (tileX - tileIndices[0]) * 256 - pixelOffsets[0];
 584                                         for (int tileY = tileIndices[2]; tileY <= tileIndices[3]; tileY++)
 585                                         {
 586                                                 int y = (tileY - tileIndices[2]) * 256 - pixelOffsets[1];
 587                                                 // Loop over layers
 588                                                 for (int l=0; l<numLayers; l++)
 589                                                 {
 590                                                         Image image = _tileManager.getTile(l, tileX, tileY, true);
 591                                                         if (image != null) {
 592                                                                 g.drawImage(image, x, y, 256, 256, null);
 593                                                         }
 594                                                 }
 595                                         }
 596                                 }
 597
 598                                 // Make maps brighter / fainter according to slider
 599                                 final int brightnessIndex = Math.max(1, _transparencySlider.getValue()) - 1;
 600                                 if (brightnessIndex > 0)
 601                                 {
 602                                         final int[] alphas = {0, 40, 80, 120, 160, 210};
 603                                         Color bgColor = Config.getColourScheme().getColour(ColourScheme.IDX_BACKGROUND);
 604                                         bgColor = new Color(bgColor.getRed(), bgColor.getGreen(), bgColor.getBlue(), alphas[brightnessIndex]);
 605                                         g.setColor(bgColor);
 606                                         g.fillRect(0, 0, getWidth(), getHeight());
 607                                 }
 608                         }
 609                 }
 610
 611                 // Work out track opacity according to slider
 612                 final float[] opacities = {1.0f, 0.75f, 0.5f, 0.3f, 0.15f, 0.0f};
 613                 float trackOpacity = 1.0f;
 614                 if (_transparencySlider.getValue() < 0) {
 615                         trackOpacity = opacities[-1 - _transparencySlider.getValue()];
 616                 }
 617
 618                 if (trackOpacity > 0.0f)
 619                 {
 620                         // Paint the track points on top
 621                         boolean pointsPainted = true;
 622                         try
 623                         {
 624                                 if (trackOpacity > 0.9f)
 625                                 {
 626                                         // Track is fully opaque, just draw it directly
 627                                         pointsPainted = paintPoints(g);
 628                                         _trackImage = null;
 629                                 }
 630                                 else
 631                                 {
 632                                         // Track is partly transparent, so use a separate BufferedImage
 633                                         if (_trackImage == null || _trackImage.getWidth() != getWidth() || _trackImage.getHeight() != getHeight())
 634                                         {
 635                                                 _trackImage = new BufferedImage(getWidth(), getHeight(), BufferedImage.TYPE_INT_ARGB);
 636                                         }
 637                                         // Clear to transparent
 638                                         Graphics2D gTrack = _trackImage.createGraphics();
 639                                         gTrack.setComposite(AlphaComposite.getInstance(AlphaComposite.CLEAR, 0.0f));
 640                                         gTrack.fillRect(0, 0, getWidth(), getHeight());
 641                                         gTrack.setPaintMode();
 642                                         // Draw the track onto this separate image
 643                                         pointsPainted = paintPoints(gTrack);
 644                                         ((Graphics2D) g).setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, trackOpacity));
 645                                         g.drawImage(_trackImage, 0, 0, null);
 646                                 }
 647                         }
 648                         catch (NullPointerException npe) {} // ignore, probably due to data being changed during drawing
 649                         catch (ArrayIndexOutOfBoundsException obe) {} // also ignore
 650
 651                         // Zoom to fit if no points found
 652                         if (!pointsPainted && _checkBounds)
 653                         {
 654                                 zoomToFit();
 655                                 _recalculate = true;
 656                                 repaint();
 657                         }
 658                 }
 659
 660                 // free g
 661                 g.dispose();
 662
 663                 _checkBounds = false;
 664                 // enable / disable transparency slider
 665                 _transparencySlider.setEnabled(showMap);
 666         }
 667
 668
 669         /**
 670          * Paint the points using the given graphics object
 671          * @param inG Graphics object to use for painting
 672          * @return true if any points or lines painted
 673          */
 674         private boolean paintPoints(Graphics inG)
 675         {
 676                 // Set up colours
 677                 final ColourScheme cs = Config.getColourScheme();
 678                 final Color pointColour  = cs.getColour(ColourScheme.IDX_POINT);
 679                 final Color rangeColour  = cs.getColour(ColourScheme.IDX_SELECTION);
 680                 final Color currentColour = cs.getColour(ColourScheme.IDX_PRIMARY);
 681                 final Color secondColour = cs.getColour(ColourScheme.IDX_SECONDARY);
 682                 final Color textColour   = cs.getColour(ColourScheme.IDX_TEXT);
 683                 final PointColourer pointColourer = _app.getPointColourer();
 684
 685                 final int winWidth  = getWidth();
 686                 final int winHeight = getHeight();
 687                 final int halfWinWidth  = winWidth / 2;
 688                 final int halfWinHeight = winHeight / 2;
 689
 690                 final int numPoints = _track.getNumPoints();
 691                 final int[] xPixels = new int[numPoints];
 692                 final int[] yPixels = new int[numPoints];
 693
 694                 final int pointSeparationForArrowsSqd = 400;
 695                 final int pointSeparation1dForArrows = (int) (Math.sqrt(pointSeparationForArrowsSqd) * 0.7);
 696                 final int hugePointSeparationForArrows = 120;
 697
 698                 // try to set line width for painting
 699                 if (inG instanceof Graphics2D)
 700                 {
 701                         int lineWidth = Config.getConfigInt(Config.KEY_LINE_WIDTH);
 702                         if (lineWidth < 1 || lineWidth > 4) {lineWidth = 2;}
 703                         ((Graphics2D) inG).setStroke(new BasicStroke(lineWidth));
 704                 }
 705
 706                 boolean pointsPainted = false;
 707                 // draw track points
 708                 inG.setColor(pointColour);
 709                 int prevX = -1, prevY = -1;
 710                 final int connectState = _connectCheckBox.getCurrentState();
 711                 final boolean drawLines = (connectState != 3);  // 0, 1 or 2
 712                 final boolean drawPoints = (connectState != 1); // 0, 2 or 3
 713                 final boolean drawArrows = (connectState == 0); // 0
 714
 715                 boolean prevPointVisible = false, currPointVisible = false;
 716                 boolean anyWaypoints = false;
 717                 boolean isWaypoint = false;
 718                 boolean drawnLastArrow = false; // avoid painting arrows on adjacent lines, looks too busy
 719                 for (int i=0; i<numPoints; i++)
 720                 {
 721                         // Calculate pixel position of point from its x, y coordinates
 722                         int px = halfWinWidth  + _mapPosition.getXFromCentre(_track.getX(i));
 723                         int py = halfWinHeight + _mapPosition.getYFromCentre(_track.getY(i));
 724                         px = wrapLongitudeValue(px, winWidth, _mapPosition.getZoom());
 725                         // Remember these calculated pixel values so they don't have to be recalculated
 726                         xPixels[i] = px; yPixels[i] = py;
 727
 728                         currPointVisible = px >= 0 && px < winWidth && py >= 0 && py < winHeight;
 729                         isWaypoint = _track.getPoint(i).isWaypoint();
 730                         anyWaypoints = anyWaypoints || isWaypoint;
 731                         if (!isWaypoint)
 732                         {
 733                                 if (currPointVisible || (drawLines && prevPointVisible))
 734                                 {
 735                                         // For track points, work out which colour to use
 736                                         if (_track.getPoint(i).getDeleteFlag()) {
 737                                                 inG.setColor(currentColour);
 738                                         }
 739                                         else if (pointColourer != null)
 740                                         {  // use the point colourer if there is one
 741                                                 Color trackColour = pointColourer.getColour(i);
 742                                                 inG.setColor(trackColour);
 743                                         }
 744                                         else
 745                                         {
 746                                                 inG.setColor(pointColour);
 747                                         }
 748
 749                                         // Draw rectangle for track point if it's visible
 750                                         if (currPointVisible)
 751                                         {
 752                                                 if (drawPoints) {
 753                                                         inG.drawRect(px-2, py-2, 3, 3);
 754                                                 }
 755                                                 pointsPainted = true;
 756                                         }
 757                                 }
 758
 759                                 // Connect track points if either of them are visible
 760                                 if (drawLines
 761                                  && (currPointVisible || prevPointVisible)
 762                                  && !(prevX == -1 && prevY == -1)
 763                                  && !_track.getPoint(i).getSegmentStart())
 764                                 {
 765                                         inG.drawLine(prevX, prevY, px, py);
 766                                         pointsPainted = true;
 767
 768                                         // Now consider whether we need to draw an arrow as well
 769                                         if (drawArrows)
 770                                         {
 771                                                 final double pointDist = Math.max(Math.abs(prevX - px), Math.abs(prevY - py));
 772                                                 final int separationLimit = (drawnLastArrow ? hugePointSeparationForArrows : pointSeparation1dForArrows);
 773                                                 if (pointDist > separationLimit)
 774                                                 {
 775                                                         final double pointSeparationSqd = (prevX-px) * (prevX-px) + (prevY-py) * (prevY-py);
 776                                                         if (pointSeparationSqd > pointSeparationForArrowsSqd)
 777                                                         {
 778                                                                 final double midX = (prevX + px) / 2.0;
 779                                                                 final double midY = (prevY + py) / 2.0;
 780                                                                 final boolean midPointVisible = midX >= 0 && midX < winWidth && midY >= 0 && midY < winHeight;
 781                                                                 if (midPointVisible)
 782                                                                 {
 783                                                                         final double alpha = Math.atan2(py - prevY, px - prevX);
 784                                                                         //System.out.println("Draw arrow from (" + prevX + "," + prevY + ") to (" + px + "," + py
 785                                                                         //      + ") with angle" + (int) (alpha * 180/Math.PI));
 786                                                                         final double MID_TO_VERTEX = 3.0;
 787                                                                         final double arrowX = MID_TO_VERTEX * Math.cos(alpha);
 788                                                                         final double arrowY = MID_TO_VERTEX * Math.sin(alpha);
 789                                                                         final double vertexX = midX + arrowX;
 790                                                                         final double vertexY = midY + arrowY;
 791                                                                         inG.drawLine((int)(midX-arrowX-2*arrowY), (int)(midY-arrowY+2*arrowX), (int)vertexX, (int)vertexY);
 792                                                                         inG.drawLine((int)(midX-arrowX+2*arrowY), (int)(midY-arrowY-2*arrowX), (int)vertexX, (int)vertexY);
 793                                                                 }
 794                                                                 drawnLastArrow = midPointVisible;
 795                                                         }
 796                                                 }
 797                                                 else
 798                                                 {
 799                                                         drawnLastArrow = false;
 800                                                 }
 801                                         }
 802                                 }
 803                                 prevX = px; prevY = py;
 804                         }
 805                         prevPointVisible = currPointVisible;
 806                 }
 807
 808                 // Loop over points, just drawing blobs for waypoints
 809                 inG.setColor(textColour);
 810                 FontMetrics fm = inG.getFontMetrics();
 811                 int nameHeight = fm.getHeight();
 812                 if (anyWaypoints)
 813                 {
 814                         int numWaypoints = 0;
 815                         for (int i=0; i<_track.getNumPoints(); i++)
 816                         {
 817                                 if (_track.getPoint(i).isWaypoint())
 818                                 {
 819                                         int px = xPixels[i];
 820                                         int py = yPixels[i];
 821                                         if (px >= 0 && px < winWidth && py >= 0 && py < winHeight)
 822                                         {
 823                                                 if (_waypointIconDefinition == null)
 824                                                 {
 825                                                         inG.fillRect(px-3, py-3, 6, 6);
 826                                                 }
 827                                                 else
 828                                                 {
 829                                                         ImageIcon icon = _waypointIconDefinition.getImageIcon();
 830                                                         if (icon != null)
 831                                                         {
 832                                                                 inG.drawImage(icon.getImage(), px-_waypointIconDefinition.getXOffset(),
 833                                                                         py-_waypointIconDefinition.getYOffset(), null);
 834                                                         }
 835                                                 }
 836                                                 pointsPainted = true;
 837                                                 numWaypoints++;
 838                                         }
 839                                 }
 840                         }
 841                         // Take more care with waypoint names if less than 100 are visible
 842                         final int numNameSteps = (numWaypoints > 100 ? 1 : 4);
 843                         final int numPointSteps = (numWaypoints > 1000 ? 2 : 1);
 844
 845                         // Loop over points again, now draw names for waypoints
 846                         int[] nameXs = {0, 0, 0, 0};
 847                         int[] nameYs = {0, 0, 0, 0};
 848                         for (int i=0; i<_track.getNumPoints(); i += numPointSteps)
 849                         {
 850                                 if (_track.getPoint(i).isWaypoint())
 851                                 {
 852                                         int px = xPixels[i];
 853                                         int py = yPixels[i];
 854                                         if (px >= 0 && px < winWidth && py >= 0 && py < winHeight)
 855                                         {
 856                                                 // Figure out where to draw waypoint name so it doesn't obscure track
 857                                                 String waypointName = _track.getPoint(i).getWaypointName();
 858                                                 int nameWidth = fm.stringWidth(waypointName);
 859                                                 boolean drawnName = false;
 860                                                 // Make arrays for coordinates right left up down
 861                                                 nameXs[0] = px + 2; nameXs[1] = px - nameWidth - 2;
 862                                                 nameXs[2] = nameXs[3] = px - nameWidth/2;
 863                                                 nameYs[0] = nameYs[1] = py + (nameHeight/2);
 864                                                 nameYs[2] = py - 2; nameYs[3] = py + nameHeight + 2;
 865                                                 for (int extraSpace = 0; extraSpace < numNameSteps && !drawnName; extraSpace++)
 866                                                 {
 867                                                         // Shift arrays for coordinates right left up down
 868                                                         nameXs[0] += 3; nameXs[1] -= 3;
 869                                                         nameYs[2] -= 3; nameYs[3] += 3;
 870                                                         // Check each direction in turn right left up down
 871                                                         for (int a=0; a<4; a++)
 872                                                         {
 873                                                                 if (nameXs[a] > 0 && (nameXs[a] + nameWidth) < winWidth
 874                                                                         && nameYs[a] < winHeight && (nameYs[a] - nameHeight) > 0
 875                                                                         && !MapUtils.overlapsPoints(_mapImage, nameXs[a], nameYs[a], nameWidth, nameHeight, textColour))
 876                                                                 {
 877                                                                         // Found a rectangle to fit - draw name here and quit
 878                                                                         inG.drawString(waypointName, nameXs[a], nameYs[a]);
 879                                                                         drawnName = true;
 880                                                                         break;
 881                                                                 }
 882                                                         }
 883                                                 }
 884                                         }
 885                                 }
 886                         }
 887                 }
 888                 // Loop over points, drawing blobs for photo / audio points
 889                 inG.setColor(secondColour);
 890                 for (int i=0; i<_track.getNumPoints(); i++)
 891                 {
 892                         if (_track.getPoint(i).hasMedia())
 893                         {
 894                                 int px = xPixels[i];
 895                                 int py = yPixels[i];
 896                                 if (px >= 0 && px < winWidth && py >= 0 && py < winHeight)
 897                                 {
 898                                         inG.drawRect(px-1, py-1, 2, 2);
 899                                         inG.drawRect(px-2, py-2, 4, 4);
 900                                         pointsPainted = true;
 901                                 }
 902                         }
 903                 }
 904
 905                 // Draw selected range
 906                 if (_selection.hasRangeSelected())
 907                 {
 908                         inG.setColor(rangeColour);
 909                         for (int i=_selection.getStart(); i<=_selection.getEnd(); i++)
 910                         {
 911                                 int px = xPixels[i];
 912                                 int py = yPixels[i];
 913                                 inG.drawRect(px-1, py-1, 2, 2);
 914                         }
 915                 }
 916
 917                 // Draw crosshairs at selected point
 918                 int selectedPoint = _selection.getCurrentPointIndex();
 919                 if (selectedPoint >= 0)
 920                 {
 921                         int px = xPixels[selectedPoint];
 922                         int py = yPixels[selectedPoint];
 923                         inG.setColor(currentColour);
 924                         // crosshairs
 925                         inG.drawLine(px, 0, px, winHeight);
 926                         inG.drawLine(0, py, winWidth, py);
 927                 }
 928                 // Return the number of points painted
 929                 return pointsPainted;
 930         }
 931
 932         /**
 933          * Wrap the given pixel value if appropriate and possible
 934          * @param inPx Pixel x coordinate
 935          * @param inWinWidth window width in pixels
 936          * @param inZoom zoom level
 937          * @return modified pixel x coordinate
 938          */
 939         private static int wrapLongitudeValue(int inPx, int inWinWidth, int inZoom)
 940         {
 941                 if (inPx > inWinWidth)
 942                 {
 943                         // Pixel is too far right, could we wrap it back onto the screen?
 944                         int px = inPx;
 945                         while (px > inWinWidth) {
 946                                 px -= (256 << inZoom);
 947                         }
 948                         if (px >= 0) {
 949                                 return px; // successfully wrapped back onto the screen
 950                         }
 951                 }
 952                 else if (inPx < 0)
 953                 {
 954                         // Pixel is too far left, could we wrap it back onto the screen?
 955                         int px = inPx;
 956                         while (px < 0) {
 957                                 px += (256 << inZoom);
 958                         }
 959                         if (px < inWinWidth) {
 960                                 return px; // successfully wrapped back onto the screen
 961                         }
 962                 }
 963                 // Either it's already on the screen or couldn't be wrapped
 964                 return inPx;
 965         }
 966
 967         /**
 968          * Draw the lines while dragging a point
 969          * @param inG graphics object
 970          * @param inPrevIndex index of point to draw from
 971          * @param inNextIndex index of point to draw to
 972          */
 973         private void drawDragLines(Graphics inG, int inPrevIndex, int inNextIndex)
 974         {
 975                 inG.setColor(Config.getColourScheme().getColour(ColourScheme.IDX_POINT));
 976                 // line from prev point to cursor
 977                 if (inPrevIndex > -1 && !_track.getPoint(inPrevIndex+1).getSegmentStart())
 978                 {
 979                         final int px = getWidth() / 2 + _mapPosition.getXFromCentre(_track.getX(inPrevIndex));
 980                         final int py = getHeight() / 2 + _mapPosition.getYFromCentre(_track.getY(inPrevIndex));
 981                         inG.drawLine(px, py, _dragToX, _dragToY);
 982                 }
 983                 if (inNextIndex < _track.getNumPoints() && !_track.getPoint(inNextIndex).getSegmentStart())
 984                 {
 985                         final int px = getWidth() / 2 + _mapPosition.getXFromCentre(_track.getX(inNextIndex));
 986                         final int py = getHeight() / 2 + _mapPosition.getYFromCentre(_track.getY(inNextIndex));
 987                         inG.drawLine(px, py, _dragToX, _dragToY);
 988                 }
 989         }
 990
 991         /**
 992          * Inform that tiles have been updated and the map can be repainted
 993          * @param inIsOk true if data loaded ok, false for error
 994          */
 995         public void tilesUpdated(boolean inIsOk)
 996         {
 997                 synchronized(this)
 998                 {
 999                         // Show message if loading failed (but not too many times)
1000                         if (!inIsOk && !_shownMapLoadErrorAlready && _mapCheckBox.isSelected())
1001                         {
1002                                 _shownMapLoadErrorAlready = true;
1003                                 // use separate thread to show message about failing to load osm images
1004                                 new Thread(new Runnable() {
1005                                         public void run() {
1006                                                 try {Thread.sleep(500);} catch (InterruptedException ie) {}
1007                                                 _app.showErrorMessage("error.osmimage.dialogtitle", "error.osmimage.failed");
1008                                         }
1009                                 }).start();
1010                         }
1011                         _recalculate = true;
1012                         repaint();
1013                 }
1014         }
1015
1016         /**
1017          * Inform that a cache failure occurred
1018          */
1019         public void reportCacheFailure()
1020         {
1021                 // Cache can't be used, so disable it - user will be reminded to set it up by the tips
1022                 Config.setConfigString(Config.KEY_DISK_CACHE, null);
1023         }
1024
1025         /**
1026          * Zoom out, if not already at minimum zoom
1027          */
1028         public void zoomOut()
1029         {
1030                 _mapPosition.zoomOut();
1031                 _recalculate = true;
1032                 repaint();
1033         }
1034
1035         /**
1036          * Zoom in, if not already at maximum zoom
1037          */
1038         public void zoomIn()
1039         {
1040                 // See if selected point is currently visible, if so (and autopan on) then autopan after zoom to keep it visible
1041                 boolean wasVisible = _autopanCheckBox.isSelected() && isCurrentPointVisible();
1042                 _mapPosition.zoomIn();
1043                 if (wasVisible && !isCurrentPointVisible()) {
1044                         autopanToPoint(_selection.getCurrentPointIndex());
1045                 }
1046                 _recalculate = true;
1047                 repaint();
1048         }
1049
1050         /**
1051          * Pan map
1052          * @param inDeltaX x shift
1053          * @param inDeltaY y shift
1054          */
1055         public void panMap(int inDeltaX, int inDeltaY)
1056         {
1057                 _mapPosition.pan(inDeltaX, inDeltaY);
1058                 _recalculate = true;
1059                 repaint();
1060         }
1061
1062         /**
1063          * Create a DataPoint object from the given click coordinates
1064          * @param inX x coordinate of click
1065          * @param inY y coordinate of click
1066          * @return DataPoint with given coordinates and no altitude
1067          */
1068         private DataPoint createPointFromClick(int inX, int inY)
1069         {
1070                 double lat = MapUtils.getLatitudeFromY(_mapPosition.getYFromPixels(inY, getHeight()));
1071                 double lon = MapUtils.getLongitudeFromX(_mapPosition.getXFromPixels(inX, getWidth()));
1072                 return new DataPoint(new Latitude(lat, Coordinate.FORMAT_NONE),
1073                         new Longitude(lon, Coordinate.FORMAT_NONE), null);
1074         }
1075
1076         /**
1077          * Move a DataPoint object to the given mouse coordinates
1078          * @param startX start x coordinate of mouse
1079          * @param startY start y coordinate of mouse
1080          * @param endX end x coordinate of mouse
1081          * @param endY end y coordinate of mouse
1082          */
1083         private void movePointToMouse(int startX, int startY, int endX, int endY )
1084         {
1085                 double lat1 = MapUtils.getLatitudeFromY(_mapPosition.getYFromPixels(startY, getHeight()));
1086                 double lon1 = MapUtils.getLongitudeFromX(_mapPosition.getXFromPixels(startX, getWidth()));
1087                 double lat_delta = MapUtils.getLatitudeFromY(_mapPosition.getYFromPixels(endY, getHeight())) - lat1;
1088                 double lon_delta = MapUtils.getLongitudeFromX(_mapPosition.getXFromPixels(endX, getWidth())) - lon1;
1089
1090                 DataPoint point = _trackInfo.getCurrentPoint();
1091                 if (point == null) {
1092                         return;
1093                 }
1094
1095                 // Make lists for edit and undo, and add each changed field in turn
1096                 FieldEditList editList = new FieldEditList();
1097                 FieldEditList undoList = new FieldEditList();
1098
1099                 // Check field list
1100                 FieldList fieldList = _track.getFieldList();
1101                 int numFields = fieldList.getNumFields();
1102                 for (int i=0; i<numFields; i++)
1103                 {
1104                         Field field = fieldList.getField(i);
1105                         if (field == Field.LATITUDE) {
1106                                 editList.addEdit(new FieldEdit(field, Double.toString(point.getLatitude().getDouble() + lat_delta)));
1107                                 undoList.addEdit(new FieldEdit(field, point.getFieldValue(Field.LATITUDE)));
1108                         }
1109                         else if (field == Field.LONGITUDE) {
1110                                 editList.addEdit(new FieldEdit(field, Double.toString(point.getLongitude().getDouble() + lon_delta)));
1111                                 undoList.addEdit(new FieldEdit(field, point.getFieldValue(Field.LONGITUDE)));
1112                         }
1113                 }
1114                 _app.completePointEdit(editList, undoList);
1115         }
1116
1117
1118         /**
1119          * @see javax.swing.JComponent#getMinimumSize()
1120          */
1121         public Dimension getMinimumSize()
1122         {
1123                 final Dimension minSize = new Dimension(512, 300);
1124                 return minSize;
1125         }
1126
1127         /**
1128          * @see javax.swing.JComponent#getPreferredSize()
1129          */
1130         public Dimension getPreferredSize()
1131         {
1132                 return getMinimumSize();
1133         }
1134
1135
1136         /**
1137          * Respond to mouse click events
1138          * @see java.awt.event.MouseListener#mouseClicked(java.awt.event.MouseEvent)
1139          */
1140         public void mouseClicked(MouseEvent inE)
1141         {
1142                 final boolean showMap = Config.getConfigBoolean(Config.KEY_SHOW_MAP);
1143                 final boolean hasPoints = _track != null && _track.getNumPoints() > 0;
1144                 if (showMap || hasPoints)
1145                 {
1146                         // select point if it's a left-click
1147                         if (!inE.isMetaDown())
1148                         {
1149                                 if (inE.getClickCount() == 1)
1150                                 {
1151                                         // single left click
1152                                         if (_drawMode == MODE_DEFAULT && hasPoints)
1153                                         {
1154                                                 int pointIndex = _clickedPoint;
1155                                                 if (pointIndex == INDEX_UNKNOWN)
1156                                                 {
1157                                                         // index hasn't been calculated yet
1158                                                         pointIndex = _track.getNearestPointIndex(
1159                                                          _mapPosition.getXFromPixels(inE.getX(), getWidth()),
1160                                                          _mapPosition.getYFromPixels(inE.getY(), getHeight()),
1161                                                          _mapPosition.getBoundsFromPixels(CLICK_SENSITIVITY), false);
1162                                                 }
1163                                                 // Extend selection for shift-click
1164                                                 if (inE.isShiftDown()) {
1165                                                         _trackInfo.extendSelection(pointIndex);
1166                                                 }
1167                                                 else {
1168                                                         _trackInfo.selectPoint(pointIndex);
1169                                                 }
1170                                         }
1171                                         else if (_drawMode == MODE_DRAW_POINTS_START)
1172                                         {
1173                                                 _app.createPoint(createPointFromClick(inE.getX(), inE.getY()));
1174                                                 _dragToX = inE.getX();
1175                                                 _dragToY = inE.getY();
1176                                                 _drawMode = MODE_DRAW_POINTS_CONT;
1177                                         }
1178                                         else if (_drawMode == MODE_DRAW_POINTS_CONT)
1179                                         {
1180                                                 DataPoint point = createPointFromClick(inE.getX(), inE.getY());
1181                                                 _app.createPoint(point, false); // not a new segment
1182                                         }
1183                                 }
1184                                 else if (inE.getClickCount() == 2)
1185                                 {
1186                                         // double click
1187                                         if (_drawMode == MODE_DEFAULT) {
1188                                                 panMap(inE.getX() - getWidth()/2, inE.getY() - getHeight()/2);
1189                                                 zoomIn();
1190                                         }
1191                                         else if (_drawMode == MODE_DRAW_POINTS_START || _drawMode == MODE_DRAW_POINTS_CONT) {
1192                                                 _drawMode = MODE_DEFAULT;
1193                                         }
1194                                 }
1195                         }
1196                         else
1197                         {
1198                                 // show the popup menu for right-clicks
1199                                 _popupMenuX = inE.getX();
1200                                 _popupMenuY = inE.getY();
1201                                 _popup.show(this, _popupMenuX, _popupMenuY);
1202                         }
1203                 }
1204                 // Reset app mode
1205                 _app.setCurrentMode(App.AppMode.NORMAL);
1206                 if (_drawMode == MODE_MARK_RECTANGLE) _drawMode = MODE_DEFAULT;
1207         }
1208
1209         /**
1210          * Ignore mouse enter events
1211          * @see java.awt.event.MouseListener#mouseEntered(java.awt.event.MouseEvent)
1212          */
1213         public void mouseEntered(MouseEvent inE)
1214         {
1215                 // ignore
1216         }
1217
1218         /**
1219          * Ignore mouse exited events
1220          * @see java.awt.event.MouseListener#mouseExited(java.awt.event.MouseEvent)
1221          */
1222         public void mouseExited(MouseEvent inE)
1223         {
1224                 // ignore
1225         }
1226
1227         /**
1228          * React to mouse pressed events to initiate a point drag
1229          * @see java.awt.event.MouseListener#mousePressed(java.awt.event.MouseEvent)
1230          */
1231         public void mousePressed(MouseEvent inE)
1232         {
1233                 _clickedPoint = INDEX_UNKNOWN;
1234                 if (_track == null || _track.getNumPoints() <= 0)
1235                         return;
1236                 if (!inE.isMetaDown())
1237                 {
1238                         // Left mouse drag - check if point is near; if so select it for dragging
1239                         if (_drawMode == MODE_DEFAULT)
1240                         {
1241                                 /* Drag points if edit mode is enabled OR ALT is pressed */
1242                                 if (_editmodeCheckBox.isSelected() || inE.isAltDown() || inE.isAltGraphDown())
1243                                 {
1244                                         final double clickX = _mapPosition.getXFromPixels(inE.getX(), getWidth());
1245                                         final double clickY = _mapPosition.getYFromPixels(inE.getY(), getHeight());
1246                                         final double clickSens = _mapPosition.getBoundsFromPixels(CLICK_SENSITIVITY);
1247                                         _clickedPoint = _track.getNearestPointIndex(clickX, clickY, clickSens, false);
1248
1249                                         if (_clickedPoint >= 0)
1250                                         {
1251                                                 // TODO: maybe use another color of the cross or remove the cross while dragging???
1252
1253                                                 _trackInfo.selectPoint(_clickedPoint);
1254                                                 if (_trackInfo.getCurrentPoint() != null)
1255                                                 {
1256                                                         _drawMode = MODE_DRAG_POINT;
1257                                                         _dragFromX = _dragToX = inE.getX();
1258                                                         _dragFromY = _dragToY = inE.getY();
1259                                                 }
1260                                         }
1261                                         else
1262                                         {
1263                                                 // Not a click on a point, so check half-way between two (connected) trackpoints
1264                                                 int midpointIndex = _midpoints.getNearestPointIndex(clickX, clickY, clickSens);
1265                                                 if (midpointIndex > 0)
1266                                                 {
1267                                                         _drawMode = MODE_CREATE_MIDPOINT;
1268                                                         _clickedPoint = midpointIndex;
1269                                                         _dragFromX = _dragToX = inE.getX();
1270                                                         _dragFromY = _dragToY = inE.getY();
1271                                                 }
1272                                         }
1273                                 }
1274                         }
1275                 }
1276                 // else right-press ignored
1277         }
1278
1279         /**
1280          * Respond to mouse released events
1281          * @see java.awt.event.MouseListener#mouseReleased(java.awt.event.MouseEvent)
1282          */
1283         public void mouseReleased(MouseEvent inE)
1284         {
1285                 _recalculate = true;
1286
1287                 if (_drawMode == MODE_DRAG_POINT)
1288                 {
1289                         if (Math.abs(_dragToX - _dragFromX) > 2
1290                                 || Math.abs(_dragToY - _dragFromY) > 2)
1291                         {
1292                                 movePointToMouse(_dragFromX, _dragFromY, _dragToX, _dragToY );
1293                         }
1294                         _drawMode = MODE_DEFAULT;
1295                 }
1296                 else if (_drawMode == MODE_CREATE_MIDPOINT)
1297                 {
1298                         _drawMode = MODE_DEFAULT;
1299                         _app.createPoint(createPointFromClick(_dragToX, _dragToY), _clickedPoint);
1300                 }
1301                 else if (_drawMode == MODE_ZOOM_RECT)
1302                 {
1303                         if (Math.abs(_dragToX - _dragFromX) > 20
1304                          && Math.abs(_dragToY - _dragFromY) > 20)
1305                         {
1306                                 _mapPosition.zoomToPixels(_dragFromX, _dragToX, _dragFromY, _dragToY, getWidth(), getHeight());
1307                         }
1308                         _drawMode = MODE_DEFAULT;
1309                 }
1310                 else if (_drawMode == MODE_MARK_RECTANGLE)
1311                 {
1312                         // Reset app mode
1313                         _app.setCurrentMode(App.AppMode.NORMAL);
1314                         _drawMode = MODE_DEFAULT;
1315                         // Call a function to mark the points
1316                         MarkPointsInRectangleFunction marker = (MarkPointsInRectangleFunction) FunctionLibrary.FUNCTION_MARK_IN_RECTANGLE;
1317                         double lon1 = MapUtils.getLongitudeFromX(_mapPosition.getXFromPixels(_dragFromX, getWidth()));
1318                         double lat1 = MapUtils.getLatitudeFromY(_mapPosition.getYFromPixels(_dragFromY, getHeight()));
1319                         double lon2 = MapUtils.getLongitudeFromX(_mapPosition.getXFromPixels(_dragToX, getWidth()));
1320                         double lat2 = MapUtils.getLatitudeFromY(_mapPosition.getYFromPixels(_dragToY, getHeight()));
1321                         // Invalidate rectangle if pixel coords are (-1,-1)
1322                         if (_dragFromX < 0 || _dragFromY < 0) {
1323                                 lon1 = lon2;
1324                                 lat1 = lat2;
1325                         }
1326                         marker.setRectCoords(lon1, lat1, lon2, lat2);
1327                         marker.begin();
1328                 }
1329                 _dragFromX = _dragFromY = -1;
1330                 repaint();
1331         }
1332
1333         /**
1334          * Respond to mouse drag events
1335          * @see java.awt.event.MouseMotionListener#mouseDragged(java.awt.event.MouseEvent)
1336          */
1337         public void mouseDragged(MouseEvent inE)
1338         {
1339                 // Note: One would expect inE.isMetaDown() to give information about whether this is a
1340                 //       drag with the right mouse button or not - but since java 9 this is buggy,
1341                 //       so we use the beautifully-named getModifiersEx() instead.
1342                 //       And logically BUTTON3 refers to the secondary mouse button, not the tertiary one!
1343                 final boolean isRightDrag = (inE.getModifiersEx() & InputEvent.BUTTON3_DOWN_MASK) > 0;
1344                 if (isRightDrag)
1345                 {
1346                         // Right-click and drag - update rectangle
1347                         _drawMode = MODE_ZOOM_RECT;
1348                         if (_dragFromX == -1) {
1349                                 _dragFromX = inE.getX();
1350                                 _dragFromY = inE.getY();
1351                         }
1352                         _dragToX = inE.getX();
1353                         _dragToY = inE.getY();
1354                         repaint();
1355                 }
1356                 else
1357                 {
1358                         // Left mouse drag - decide whether to drag the point, drag the
1359                         // marking rectangle or pan the map
1360                         if (_drawMode == MODE_DRAG_POINT || _drawMode == MODE_CREATE_MIDPOINT)
1361                         {
1362                                 // move point
1363                                 _dragToX = inE.getX();
1364                                 _dragToY = inE.getY();
1365                                 _recalculate = true;
1366                                 repaint();
1367                         }
1368                         else if (_drawMode == MODE_MARK_RECTANGLE)
1369                         {
1370                                 // draw a rectangle for marking points
1371                                 if (_dragFromX == -1) {
1372                                         _dragFromX = inE.getX();
1373                                         _dragFromY = inE.getY();
1374                                 }
1375                                 _dragToX = inE.getX();
1376                                 _dragToY = inE.getY();
1377                                 repaint();
1378                         }
1379                         else
1380                         {
1381                                 // regular left-drag pans map by appropriate amount
1382                                 if (_dragFromX != -1)
1383                                 {
1384                                         panMap(_dragFromX - inE.getX(), _dragFromY - inE.getY());
1385                                 }
1386                                 _dragFromX = _dragToX = inE.getX();
1387                                 _dragFromY = _dragToY = inE.getY();
1388                         }
1389                 }
1390         }
1391
1392         /**
1393          * Respond to mouse move events without button pressed
1394          * @param inEvent ignored
1395          */
1396         public void mouseMoved(MouseEvent inEvent)
1397         {
1398                 boolean useCrosshairs = false;
1399                 boolean useResize     = false;
1400                 // Ignore unless we're drawing points
1401                 if (_drawMode == MODE_DRAW_POINTS_CONT)
1402                 {
1403                         _dragToX = inEvent.getX();
1404                         _dragToY = inEvent.getY();
1405                         repaint();
1406                 }
1407                 else if (_drawMode == MODE_MARK_RECTANGLE) {
1408                         useResize = true;
1409                 }
1410                 else if (_editmodeCheckBox.isSelected() || inEvent.isAltDown() || inEvent.isAltGraphDown())
1411                 {
1412                         // Try to find a point or a midpoint at this location, and if there is one
1413                         // then change the cursor to crosshairs
1414                         final double clickX = _mapPosition.getXFromPixels(inEvent.getX(), getWidth());
1415                         final double clickY = _mapPosition.getYFromPixels(inEvent.getY(), getHeight());
1416                         final double clickSens = _mapPosition.getBoundsFromPixels(CLICK_SENSITIVITY);
1417                         useCrosshairs = (_track.getNearestPointIndex(clickX, clickY, clickSens, false) >= 0
1418                                 || _midpoints.getNearestPointIndex(clickX, clickY, clickSens) >= 0
1419                         );
1420                 }
1421                 if (useCrosshairs && !isCursorSet()) {
1422                         setCursor(Cursor.getPredefinedCursor(Cursor.CROSSHAIR_CURSOR));
1423                 }
1424                 else if (useResize && !isCursorSet()) {
1425                         setCursor(Cursor.getPredefinedCursor(Cursor.SE_RESIZE_CURSOR));
1426                 }
1427                 else if (!useCrosshairs && !useResize && isCursorSet()) {
1428                         setCursor(null);
1429                 }
1430         }
1431
1432         /**
1433          * Respond to status bar message from broker
1434          * @param inMessage message, ignored
1435          */
1436         public void actionCompleted(String inMessage)
1437         {
1438                 // ignore
1439         }
1440
1441         /**
1442          * Respond to data updated message from broker
1443          * @param inUpdateType type of update
1444          */
1445         public void dataUpdated(byte inUpdateType)
1446         {
1447                 _recalculate = true;
1448                 if ((inUpdateType & DataSubscriber.DATA_ADDED_OR_REMOVED) > 0) {
1449                         _checkBounds = true;
1450                 }
1451                 if ((inUpdateType & DataSubscriber.MAPSERVER_CHANGED) > 0)
1452                 {
1453                         // Get the selected map source index and pass to tile manager
1454                         _tileManager.setMapSource(Config.getConfigInt(Config.KEY_MAPSOURCE_INDEX));
1455                         final int wpType = Config.getConfigInt(Config.KEY_WAYPOINT_ICONS);
1456                         if (wpType == WpIconLibrary.WAYPT_DEFAULT)
1457                         {
1458                                 _waypointIconDefinition = null;
1459                         }
1460                         else
1461                         {
1462                                 final int wpSize = Config.getConfigInt(Config.KEY_WAYPOINT_ICON_SIZE);
1463                                 _waypointIconDefinition = WpIconLibrary.getIconDefinition(wpType, wpSize);
1464                         }
1465                 }
1466                 if ((inUpdateType & (DataSubscriber.DATA_ADDED_OR_REMOVED + DataSubscriber.DATA_EDITED)) > 0) {
1467                         _midpoints.updateData(_track);
1468                 }
1469                 // See if rect mode has been activated
1470                 if (_app.getCurrentMode() == App.AppMode.DRAWRECT)
1471                 {
1472                         _drawMode = MODE_MARK_RECTANGLE;
1473                         if (!isCursorSet()) {
1474                                 setCursor(Cursor.getPredefinedCursor(Cursor.SE_RESIZE_CURSOR));
1475                         }
1476                 }
1477                 repaint();
1478                 // grab focus for the key presses
1479                 this.requestFocus();
1480         }
1481
1482         /**
1483          * Respond to key presses on the map canvas
1484          * @param inE key event
1485          */
1486         public void keyPressed(KeyEvent inE)
1487         {
1488                 int code = inE.getKeyCode();
1489                 int currPointIndex = _selection.getCurrentPointIndex();
1490                 // Check for Ctrl key (for Linux/Win) or meta key (Clover key for Mac)
1491                 if (inE.isControlDown() || inE.isMetaDown())
1492                 {
1493                         // Shift as well makes things faster
1494                         final int pointIncrement = inE.isShiftDown()?3:1;
1495                         // Check for arrow keys to zoom in and out
1496                         if (code == KeyEvent.VK_UP)
1497                                 zoomIn();
1498                         else if (code == KeyEvent.VK_DOWN)
1499                                 zoomOut();
1500                         // Key nav for next/prev point
1501                         else if (code == KeyEvent.VK_LEFT && currPointIndex > 0)
1502                                 _trackInfo.incrementPointIndex(-pointIncrement);
1503                         else if (code == KeyEvent.VK_RIGHT)
1504                                 _trackInfo.incrementPointIndex(pointIncrement);
1505                         else if (code == KeyEvent.VK_PAGE_UP)
1506                                 _trackInfo.selectPoint(Checker.getPreviousSegmentStart(
1507                                         _trackInfo.getTrack(), _trackInfo.getSelection().getCurrentPointIndex()));
1508                         else if (code == KeyEvent.VK_PAGE_DOWN)
1509                                 _trackInfo.selectPoint(Checker.getNextSegmentStart(
1510                                         _trackInfo.getTrack(), _trackInfo.getSelection().getCurrentPointIndex()));
1511                         // Check for home and end
1512                         else if (code == KeyEvent.VK_HOME)
1513                                 _trackInfo.selectPoint(0);
1514                         else if (code == KeyEvent.VK_END)
1515                                 _trackInfo.selectPoint(_trackInfo.getTrack().getNumPoints()-1);
1516                 }
1517                 else
1518                 {
1519                         // Check for arrow keys to pan
1520                         int upwardsPan = 0;
1521                         if (code == KeyEvent.VK_UP)
1522                                 upwardsPan = -PAN_DISTANCE;
1523                         else if (code == KeyEvent.VK_DOWN)
1524                                 upwardsPan = PAN_DISTANCE;
1525                         int rightwardsPan = 0;
1526                         if (code == KeyEvent.VK_RIGHT)
1527                                 rightwardsPan = PAN_DISTANCE;
1528                         else if (code == KeyEvent.VK_LEFT)
1529                                 rightwardsPan = -PAN_DISTANCE;
1530                         panMap(rightwardsPan, upwardsPan);
1531                         // Check for escape
1532                         if (code == KeyEvent.VK_ESCAPE)
1533                                 _drawMode = MODE_DEFAULT;
1534                         // Check for backspace key to delete current point (delete key already handled by menu)
1535                         else if (code == KeyEvent.VK_BACK_SPACE && currPointIndex >= 0) {
1536                                 _app.deleteCurrentPoint();
1537                         }
1538                 }
1539         }
1540
1541         /**
1542          * @param inE key released event, ignored
1543          */
1544         public void keyReleased(KeyEvent e)
1545         {
1546                 // ignore
1547         }
1548
1549         /**
1550          * @param inE key typed event, ignored
1551          */
1552         public void keyTyped(KeyEvent inE)
1553         {
1554                 // ignore
1555         }
1556
1557         /**
1558          * @param inE mouse wheel event indicating scroll direction
1559          */
1560         public void mouseWheelMoved(MouseWheelEvent inE)
1561         {
1562                 int clicks = inE.getWheelRotation();
1563                 if (clicks < 0) {
1564                         panMap((inE.getX() - getWidth()/2)/2, (inE.getY() - getHeight()/2)/2);
1565                         zoomIn();
1566                 }
1567                 else if (clicks > 0) {
1568                         panMap(-(inE.getX() - getWidth()/2), -(inE.getY() - getHeight()/2));
1569                         zoomOut();
1570                 }
1571         }
1572
1573         /**
1574          * @return current map position
1575          */
1576         public MapPosition getMapPosition()
1577         {
1578                 return _mapPosition;
1579         }
1580 }