tim/prune/gui/map/MapCanvas.java

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