tim/prune/gui/map/MapCanvas.java

   1 package tim.prune.gui.map;
   2
   3 import java.awt.BorderLayout;
   4 import java.awt.Color;
   5 import java.awt.Dimension;
   6 import java.awt.FlowLayout;
   7 import java.awt.FontMetrics;
   8 import java.awt.Graphics;
   9 import java.awt.Image;
  10 import java.awt.RenderingHints;
  11 import java.awt.event.ActionEvent;
  12 import java.awt.event.ActionListener;
  13 import java.awt.event.ItemEvent;
  14 import java.awt.event.ItemListener;
  15 import java.awt.event.KeyEvent;
  16 import java.awt.event.KeyListener;
  17 import java.awt.event.MouseEvent;
  18 import java.awt.event.MouseListener;
  19 import java.awt.event.MouseMotionListener;
  20 import java.awt.event.MouseWheelEvent;
  21 import java.awt.event.MouseWheelListener;
  22 import java.awt.image.BufferedImage;
  23 import java.awt.image.RescaleOp;
  24
  25 import javax.swing.BorderFactory;
  26 import javax.swing.BoxLayout;
  27 import javax.swing.JButton;
  28 import javax.swing.JCheckBox;
  29 import javax.swing.JMenuItem;
  30 import javax.swing.JPanel;
  31 import javax.swing.JPopupMenu;
  32 import javax.swing.JSlider;
  33 import javax.swing.event.ChangeEvent;
  34 import javax.swing.event.ChangeListener;
  35
  36 import tim.prune.App;
  37 import tim.prune.DataSubscriber;
  38 import tim.prune.FunctionLibrary;
  39 import tim.prune.I18nManager;
  40 import tim.prune.UpdateMessageBroker;
  41 import tim.prune.config.ColourScheme;
  42 import tim.prune.config.Config;
  43 import tim.prune.data.Checker;
  44 import tim.prune.data.Coordinate;
  45 import tim.prune.data.DataPoint;
  46 import tim.prune.data.DoubleRange;
  47 import tim.prune.data.Latitude;
  48 import tim.prune.data.Longitude;
  49 import tim.prune.data.Selection;
  50 import tim.prune.data.Track;
  51 import tim.prune.data.TrackInfo;
  52 import tim.prune.gui.IconManager;
  53
  54 /**
  55  * Class for the map canvas, to display a background map and draw on it
  56  */
  57 public class MapCanvas extends JPanel implements MouseListener, MouseMotionListener, DataSubscriber,
  58         KeyListener, MouseWheelListener
  59 {
  60         /** App object for callbacks */
  61         private App _app = null;
  62         /** Track object */
  63         private Track _track = null;
  64         /** TrackInfo object */
  65         private TrackInfo _trackInfo = null;
  66         /** Selection object */
  67         private Selection _selection = null;
  68         /** Previously selected point */
  69         private int _prevSelectedPoint = -1;
  70         /** Tile manager */
  71         private MapTileManager _tileManager = new MapTileManager(this);
  72         /** Image to display */
  73         private BufferedImage _mapImage = null;
  74         /** Slider for transparency */
  75         private JSlider _transparencySlider = null;
  76         /** Checkbox for scale bar */
  77         private JCheckBox _scaleCheckBox = null;
  78         /** Checkbox for maps */
  79         private JCheckBox _mapCheckBox = null;
  80         /** Checkbox for autopan */
  81         private JCheckBox _autopanCheckBox = null;
  82         /** Checkbox for connecting track points */
  83         private JCheckBox _connectCheckBox = null;
  84         /** Right-click popup menu */
  85         private JPopupMenu _popup = null;
  86         /** Top component panel */
  87         private JPanel _topPanel = null;
  88         /** Side component panel */
  89         private JPanel _sidePanel = null;
  90         /** Scale bar */
  91         private ScaleBar _scaleBar = null;
  92         /* Data */
  93         private DoubleRange _latRange = null, _lonRange = null;
  94         private DoubleRange _xRange = null, _yRange = null;
  95         private boolean _recalculate = false;
  96         /** Flag to check bounds on next paint */
  97         private boolean _checkBounds = false;
  98         /** Map position */
  99         private MapPosition _mapPosition = null;
 100         /** x coordinate of drag from point */
 101         private int _dragFromX = -1;
 102         /** y coordinate of drag from point */
 103         private int _dragFromY = -1;
 104         /** Flag set to true for right-click dragging */
 105         private boolean _zoomDragging = false;
 106         /** x coordinate of drag to point */
 107         private int _dragToX = -1;
 108         /** y coordinate of drag to point */
 109         private int _dragToY = -1;
 110         /** x coordinate of popup menu */
 111         private int _popupMenuX = -1;
 112         /** y coordinate of popup menu */
 113         private int _popupMenuY = -1;
 114         /** Flag to prevent showing too often the error message about loading maps */
 115         private boolean _shownOsmErrorAlready = false;
 116
 117         /** Constant for click sensitivity when selecting nearest point */
 118         private static final int CLICK_SENSITIVITY = 10;
 119         /** Constant for pan distance from key presses */
 120         private static final int PAN_DISTANCE = 20;
 121         /** Constant for pan distance from autopan */
 122         private static final int AUTOPAN_DISTANCE = 75;
 123
 124         // Colours
 125         private static final Color COLOR_MESSAGES   = Color.GRAY;
 126
 127
 128         /**
 129          * Constructor
 130          * @param inApp App object for callbacks
 131          * @param inTrackInfo track info object
 132          */
 133         public MapCanvas(App inApp, TrackInfo inTrackInfo)
 134         {
 135                 _app = inApp;
 136                 _trackInfo = inTrackInfo;
 137                 _track = inTrackInfo.getTrack();
 138                 _selection = inTrackInfo.getSelection();
 139                 _mapPosition = new MapPosition();
 140                 addMouseListener(this);
 141                 addMouseMotionListener(this);
 142                 addMouseWheelListener(this);
 143                 addKeyListener(this);
 144
 145                 // Make listener for changes to controls
 146                 ItemListener itemListener = new ItemListener() {
 147                         public void itemStateChanged(ItemEvent e)
 148                         {
 149                                 _recalculate = true;
 150                                 repaint();
 151                         }
 152                 };
 153                 // Make special listener for changes to map checkbox
 154                 ItemListener mapCheckListener = new ItemListener() {
 155                         public void itemStateChanged(ItemEvent e)
 156                         {
 157                                 _tileManager.clearMemoryCaches();
 158                                 _recalculate = true;
 159                                 Config.setConfigBoolean(Config.KEY_SHOW_MAP, e.getStateChange() == ItemEvent.SELECTED);
 160                                 UpdateMessageBroker.informSubscribers(); // to let menu know
 161                         }
 162                 };
 163                 _topPanel = new JPanel();
 164                 _topPanel.setLayout(new FlowLayout());
 165                 _topPanel.setOpaque(false);
 166                 // Make slider for transparency
 167                 _transparencySlider = new JSlider(0, 5, 0);
 168                 _transparencySlider.setPreferredSize(new Dimension(100, 20));
 169                 _transparencySlider.setMajorTickSpacing(1);
 170                 _transparencySlider.setSnapToTicks(true);
 171                 _transparencySlider.setOpaque(false);
 172                 _transparencySlider.addChangeListener(new ChangeListener() {
 173                         public void stateChanged(ChangeEvent e)
 174                         {
 175                                 _recalculate = true;
 176                                 repaint();
 177                         }
 178                 });
 179                 _transparencySlider.setFocusable(false); // stop slider from stealing keyboard focus
 180                 _topPanel.add(_transparencySlider);
 181                 // Add checkbox button for enabling scale bar
 182                 _scaleCheckBox = new JCheckBox(IconManager.getImageIcon(IconManager.SCALEBAR_BUTTON), true);
 183                 _scaleCheckBox.setSelectedIcon(IconManager.getImageIcon(IconManager.SCALEBAR_BUTTON_ON));
 184                 _scaleCheckBox.setOpaque(false);
 185                 _scaleCheckBox.setToolTipText(I18nManager.getText("menu.map.showscalebar"));
 186                 _scaleCheckBox.addItemListener(new ItemListener() {
 187                         public void itemStateChanged(ItemEvent e) {
 188                                 _scaleBar.setVisible(_scaleCheckBox.isSelected());
 189                         }
 190                 });
 191                 _scaleCheckBox.setFocusable(false); // stop button from stealing keyboard focus
 192                 _topPanel.add(_scaleCheckBox);
 193                 // Add checkbox button for enabling maps or not
 194                 _mapCheckBox = new JCheckBox(IconManager.getImageIcon(IconManager.MAP_BUTTON), false);
 195                 _mapCheckBox.setSelectedIcon(IconManager.getImageIcon(IconManager.MAP_BUTTON_ON));
 196                 _mapCheckBox.setOpaque(false);
 197                 _mapCheckBox.setToolTipText(I18nManager.getText("menu.map.showmap"));
 198                 _mapCheckBox.addItemListener(mapCheckListener);
 199                 _mapCheckBox.setFocusable(false); // stop button from stealing keyboard focus
 200                 _topPanel.add(_mapCheckBox);
 201                 // Add checkbox button for enabling autopan or not
 202                 _autopanCheckBox = new JCheckBox(IconManager.getImageIcon(IconManager.AUTOPAN_BUTTON), true);
 203                 _autopanCheckBox.setSelectedIcon(IconManager.getImageIcon(IconManager.AUTOPAN_BUTTON_ON));
 204                 _autopanCheckBox.setOpaque(false);
 205                 _autopanCheckBox.setToolTipText(I18nManager.getText("menu.map.autopan"));
 206                 _autopanCheckBox.addItemListener(itemListener);
 207                 _autopanCheckBox.setFocusable(false); // stop button from stealing keyboard focus
 208                 _topPanel.add(_autopanCheckBox);
 209                 // Add checkbox button for connecting points or not
 210                 _connectCheckBox = new JCheckBox(IconManager.getImageIcon(IconManager.POINTS_DISCONNECTED_BUTTON), true);
 211                 _connectCheckBox.setSelectedIcon(IconManager.getImageIcon(IconManager.POINTS_CONNECTED_BUTTON));
 212                 _connectCheckBox.setOpaque(false);
 213                 _connectCheckBox.setToolTipText(I18nManager.getText("menu.map.connect"));
 214                 _connectCheckBox.addItemListener(itemListener);
 215                 _connectCheckBox.setFocusable(false); // stop button from stealing keyboard focus
 216                 _topPanel.add(_connectCheckBox);
 217
 218                 // Add zoom in, zoom out buttons
 219                 _sidePanel = new JPanel();
 220                 _sidePanel.setLayout(new BoxLayout(_sidePanel, BoxLayout.Y_AXIS));
 221                 _sidePanel.setOpaque(false);
 222                 JButton zoomInButton = new JButton(IconManager.getImageIcon(IconManager.ZOOM_IN_BUTTON));
 223                 zoomInButton.setBorder(BorderFactory.createEmptyBorder(3, 3, 3, 3));
 224                 zoomInButton.setContentAreaFilled(false);
 225                 zoomInButton.setToolTipText(I18nManager.getText("menu.map.zoomin"));
 226                 zoomInButton.addActionListener(new ActionListener() {
 227                         public void actionPerformed(ActionEvent e)
 228                         {
 229                                 zoomIn();
 230                         }
 231                 });
 232                 zoomInButton.setFocusable(false); // stop button from stealing keyboard focus
 233                 _sidePanel.add(zoomInButton);
 234                 JButton zoomOutButton = new JButton(IconManager.getImageIcon(IconManager.ZOOM_OUT_BUTTON));
 235                 zoomOutButton.setBorder(BorderFactory.createEmptyBorder(3, 3, 3, 3));
 236                 zoomOutButton.setContentAreaFilled(false);
 237                 zoomOutButton.setToolTipText(I18nManager.getText("menu.map.zoomout"));
 238                 zoomOutButton.addActionListener(new ActionListener() {
 239                         public void actionPerformed(ActionEvent e)
 240                         {
 241                                 zoomOut();
 242                         }
 243                 });
 244                 zoomOutButton.setFocusable(false); // stop button from stealing keyboard focus
 245                 _sidePanel.add(zoomOutButton);
 246
 247                 // Bottom panel for scale bar
 248                 _scaleBar = new ScaleBar();
 249
 250                 // add control panels to this one
 251                 setLayout(new BorderLayout());
 252                 _topPanel.setVisible(false);
 253                 _sidePanel.setVisible(false);
 254                 add(_topPanel, BorderLayout.NORTH);
 255                 add(_sidePanel, BorderLayout.WEST);
 256                 add(_scaleBar, BorderLayout.SOUTH);
 257                 // Make popup menu
 258                 makePopup();
 259         }
 260
 261
 262         /**
 263          * Make the popup menu for right-clicking the map
 264          */
 265         private void makePopup()
 266         {
 267                 _popup = new JPopupMenu();
 268                 JMenuItem zoomInItem = new JMenuItem(I18nManager.getText("menu.map.zoomin"));
 269                 zoomInItem.addActionListener(new ActionListener() {
 270                         public void actionPerformed(ActionEvent e)
 271                         {
 272                                 zoomIn();
 273                         }});
 274                 zoomInItem.setEnabled(true);
 275                 _popup.add(zoomInItem);
 276                 JMenuItem zoomOutItem = new JMenuItem(I18nManager.getText("menu.map.zoomout"));
 277                 zoomOutItem.addActionListener(new ActionListener() {
 278                         public void actionPerformed(ActionEvent e)
 279                         {
 280                                 zoomOut();
 281                         }});
 282                 zoomOutItem.setEnabled(true);
 283                 _popup.add(zoomOutItem);
 284                 JMenuItem zoomFullItem = new JMenuItem(I18nManager.getText("menu.map.zoomfull"));
 285                 zoomFullItem.addActionListener(new ActionListener() {
 286                         public void actionPerformed(ActionEvent e)
 287                         {
 288                                 zoomToFit();
 289                                 _recalculate = true;
 290                                 repaint();
 291                         }});
 292                 zoomFullItem.setEnabled(true);
 293                 _popup.add(zoomFullItem);
 294                 _popup.addSeparator();
 295                 // Set background
 296                 JMenuItem setMapBgItem = new JMenuItem(
 297                         I18nManager.getText(FunctionLibrary.FUNCTION_SET_MAP_BG.getNameKey()));
 298                 setMapBgItem.addActionListener(new ActionListener() {
 299                         public void actionPerformed(ActionEvent e)
 300                         {
 301                                 FunctionLibrary.FUNCTION_SET_MAP_BG.begin();
 302                         }});
 303                 _popup.add(setMapBgItem);
 304                 // new point option
 305                 JMenuItem newPointItem = new JMenuItem(I18nManager.getText("menu.map.newpoint"));
 306                 newPointItem.addActionListener(new ActionListener() {
 307                         public void actionPerformed(ActionEvent e)
 308                         {
 309                                 double lat = MapUtils.getLatitudeFromY(_mapPosition.getYFromPixels(_popupMenuY, getHeight()));
 310                                 double lon = MapUtils.getLongitudeFromX(_mapPosition.getXFromPixels(_popupMenuX, getWidth()));
 311                                 _app.createPoint(new DataPoint(new Latitude(lat, Coordinate.FORMAT_NONE),
 312                                         new Longitude(lon, Coordinate.FORMAT_NONE), null));
 313                         }});
 314                 newPointItem.setEnabled(true);
 315                 _popup.add(newPointItem);
 316         }
 317
 318
 319         /**
 320          * Zoom to fit the current data area
 321          */
 322         private void zoomToFit()
 323         {
 324                 _latRange = _track.getLatRange();
 325                 _lonRange = _track.getLonRange();
 326                 _xRange = new DoubleRange(MapUtils.getXFromLongitude(_lonRange.getMinimum()),
 327                         MapUtils.getXFromLongitude(_lonRange.getMaximum()));
 328                 _yRange = new DoubleRange(MapUtils.getYFromLatitude(_latRange.getMinimum()),
 329                         MapUtils.getYFromLatitude(_latRange.getMaximum()));
 330                 _mapPosition.zoomToXY(_xRange.getMinimum(), _xRange.getMaximum(), _yRange.getMinimum(), _yRange.getMaximum(),
 331                                 getWidth(), getHeight());
 332         }
 333
 334
 335         /**
 336          * Paint method
 337          * @see java.awt.Canvas#paint(java.awt.Graphics)
 338          */
 339         public void paint(Graphics inG)
 340         {
 341                 super.paint(inG);
 342                 if (_mapImage != null && (_mapImage.getWidth() != getWidth() || _mapImage.getHeight() != getHeight())) {
 343                         _mapImage = null;
 344                 }
 345                 if (_track.getNumPoints() > 0)
 346                 {
 347                         // Check for autopan if enabled / necessary
 348                         if (_autopanCheckBox.isSelected())
 349                         {
 350                                 int selectedPoint = _selection.getCurrentPointIndex();
 351                                 if (selectedPoint >= 0 && _dragFromX == -1 && selectedPoint != _prevSelectedPoint)
 352                                 {
 353                                         int px = getWidth() / 2 + _mapPosition.getXFromCentre(_track.getX(selectedPoint));
 354                                         int py = getHeight() / 2 + _mapPosition.getYFromCentre(_track.getY(selectedPoint));
 355                                         int panX = 0;
 356                                         int panY = 0;
 357                                         if (px < PAN_DISTANCE) {
 358                                                 panX = px - AUTOPAN_DISTANCE;
 359                                         }
 360                                         else if (px > (getWidth()-PAN_DISTANCE)) {
 361                                                 panX = AUTOPAN_DISTANCE + px - getWidth();
 362                                         }
 363                                         if (py < PAN_DISTANCE) {
 364                                                 panY = py - AUTOPAN_DISTANCE;
 365                                         }
 366                                         if (py > (getHeight()-PAN_DISTANCE)) {
 367                                                 panY = AUTOPAN_DISTANCE + py - getHeight();
 368                                         }
 369                                         if (panX != 0 || panY != 0) {
 370                                                 _mapPosition.pan(panX, panY);
 371                                         }
 372                                 }
 373                                 _prevSelectedPoint = selectedPoint;
 374                         }
 375
 376                         // Draw the map contents if necessary
 377                         if ((_mapImage == null || _recalculate))
 378                         {
 379                                 paintMapContents();
 380                                 _scaleBar.updateScale(_mapPosition.getZoom(), _mapPosition.getCentreTileY());
 381                         }
 382                         // Draw the prepared image onto the panel
 383                         if (_mapImage != null) {
 384                                 inG.drawImage(_mapImage, 0, 0, getWidth(), getHeight(), null);
 385                         }
 386                         // Draw the zoom rectangle if necessary
 387                         if (_zoomDragging)
 388                         {
 389                                 inG.setColor(Color.RED);
 390                                 inG.drawLine(_dragFromX, _dragFromY, _dragFromX, _dragToY);
 391                                 inG.drawLine(_dragFromX, _dragFromY, _dragToX, _dragFromY);
 392                                 inG.drawLine(_dragToX, _dragFromY, _dragToX, _dragToY);
 393                                 inG.drawLine(_dragFromX, _dragToY, _dragToX, _dragToY);
 394                         }
 395                 }
 396                 else
 397                 {
 398                         inG.setColor(Config.getColourScheme().getColour(ColourScheme.IDX_BACKGROUND));
 399                         inG.fillRect(0, 0, getWidth(), getHeight());
 400                         inG.setColor(COLOR_MESSAGES);
 401                         inG.drawString(I18nManager.getText("display.nodata"), 50, getHeight()/2);
 402                         _scaleBar.updateScale(-1, 0);
 403                 }
 404                 // Draw slider etc on top
 405                 paintChildren(inG);
 406         }
 407
 408
 409         /**
 410          * Paint the map tiles and the points on to the _mapImage
 411          */
 412         private void paintMapContents()
 413         {
 414                 if (_mapImage == null || _mapImage.getWidth() != getWidth() || _mapImage.getHeight() != getHeight())
 415                 {
 416                         _mapImage = new BufferedImage(getWidth(), getHeight(), BufferedImage.TYPE_INT_RGB);
 417                 }
 418
 419                 // Clear map
 420                 Graphics g = _mapImage.getGraphics();
 421                 // Clear to background
 422                 g.setColor(Config.getColourScheme().getColour(ColourScheme.IDX_BACKGROUND));
 423                 g.fillRect(0, 0, getWidth(), getHeight());
 424
 425                 // Check whether maps are on or not
 426                 boolean showMap = Config.getConfigBoolean(Config.KEY_SHOW_MAP);
 427                 _mapCheckBox.setSelected(showMap);
 428
 429                 // reset error message
 430                 if (!showMap) {_shownOsmErrorAlready = false;}
 431                 _recalculate = false;
 432                 // Only get map tiles if selected
 433                 if (showMap)
 434                 {
 435                         // init tile cacher
 436                         _tileManager.centreMap(_mapPosition.getZoom(), _mapPosition.getCentreTileX(), _mapPosition.getCentreTileY());
 437
 438                         boolean loadingFailed = false;
 439                         if (_mapImage == null) return;
 440
 441                         if (_tileManager.isOverzoomed())
 442                         {
 443                                 // display overzoom message
 444                                 g.setColor(COLOR_MESSAGES);
 445                                 g.drawString(I18nManager.getText("map.overzoom"), 50, getHeight()/2);
 446                         }
 447                         else
 448                         {
 449                                 int numLayers = _tileManager.getNumLayers();
 450                                 // Loop over tiles drawing each one
 451                                 int[] tileIndices = _mapPosition.getTileIndices(getWidth(), getHeight());
 452                                 int[] pixelOffsets = _mapPosition.getDisplayOffsets(getWidth(), getHeight());
 453                                 for (int tileX = tileIndices[0]; tileX <= tileIndices[1] && !loadingFailed; tileX++)
 454                                 {
 455                                         int x = (tileX - tileIndices[0]) * 256 - pixelOffsets[0];
 456                                         for (int tileY = tileIndices[2]; tileY <= tileIndices[3]; tileY++)
 457                                         {
 458                                                 int y = (tileY - tileIndices[2]) * 256 - pixelOffsets[1];
 459                                                 // Loop over layers
 460                                                 for (int l=0; l<numLayers; l++)
 461                                                 {
 462                                                         Image image = _tileManager.getTile(l, tileX, tileY);
 463                                                         if (image != null) {
 464                                                                 g.drawImage(image, x, y, 256, 256, null);
 465                                                         }
 466                                                 }
 467                                         }
 468                                 }
 469
 470                                 // Make maps brighter / fainter
 471                                 float[] scaleFactors = {1.0f, 1.05f, 1.1f, 1.2f, 1.6f, 2.0f};
 472                                 float scaleFactor = scaleFactors[_transparencySlider.getValue()];
 473                                 if (scaleFactor > 1.0f)
 474                                 {
 475                                         RenderingHints hints = new RenderingHints(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_OFF);
 476                                         hints.put(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
 477                                         RescaleOp op = new RescaleOp(scaleFactor, 0, hints);
 478                                         op.filter(_mapImage, _mapImage);
 479                                 }
 480                         }
 481                 }
 482
 483                 // Paint the track points on top
 484                 int pointsPainted = 1;
 485                 try
 486                 {
 487                         pointsPainted = paintPoints(g);
 488                 }
 489                 catch (NullPointerException npe) { // ignore, probably due to data being changed during drawing
 490                 }
 491
 492                 // free g
 493                 g.dispose();
 494
 495                 // Zoom to fit if no points found
 496                 if (pointsPainted <= 0 && _checkBounds) {
 497                         zoomToFit();
 498                         _recalculate = true;
 499                         repaint();
 500                 }
 501                 _checkBounds = false;
 502                 // enable / disable transparency slider
 503                 _transparencySlider.setEnabled(showMap);
 504         }
 505
 506
 507         /**
 508          * Paint the points using the given graphics object
 509          * @param inG Graphics object to use for painting
 510          * @return number of points painted, if any
 511          */
 512         private int paintPoints(Graphics inG)
 513         {
 514                 // Set up colours
 515                 final Color pointColour = Config.getColourScheme().getColour(ColourScheme.IDX_POINT);
 516                 final Color rangeColour = Config.getColourScheme().getColour(ColourScheme.IDX_SELECTION);
 517                 final Color currentColour = Config.getColourScheme().getColour(ColourScheme.IDX_PRIMARY);
 518                 final Color secondColour = Config.getColourScheme().getColour(ColourScheme.IDX_SECONDARY);
 519                 final Color textColour = Config.getColourScheme().getColour(ColourScheme.IDX_TEXT);
 520
 521                 int pointsPainted = 0;
 522                 // draw track points
 523                 inG.setColor(pointColour);
 524                 int prevX = -1, prevY = -1;
 525                 boolean connectPoints = _connectCheckBox.isSelected();
 526                 boolean prevPointVisible = false, currPointVisible = false;
 527                 boolean anyWaypoints = false;
 528                 boolean isWaypoint = false;
 529                 for (int i=0; i<_track.getNumPoints(); i++)
 530                 {
 531                         int px = getWidth() / 2 + _mapPosition.getXFromCentre(_track.getX(i));
 532                         int py = getHeight() / 2 + _mapPosition.getYFromCentre(_track.getY(i));
 533                         currPointVisible = px >= 0 && px < getWidth() && py >= 0 && py < getHeight();
 534                         isWaypoint = _track.getPoint(i).isWaypoint();
 535                         anyWaypoints = anyWaypoints || isWaypoint;
 536                         if (currPointVisible)
 537                         {
 538                                 if (!isWaypoint)
 539                                 {
 540                                         // Draw rectangle for track point
 541                                         if (_track.getPoint(i).getDeleteFlag()) {
 542                                                 inG.setColor(currentColour);
 543                                         }
 544                                         else {
 545                                                 inG.setColor(pointColour);
 546                                         }
 547                                         inG.drawRect(px-2, py-2, 3, 3);
 548                                         pointsPainted++;
 549                                 }
 550                         }
 551                         if (!isWaypoint)
 552                         {
 553                                 // Connect track points if either of them are visible
 554                                 if (connectPoints && (currPointVisible || prevPointVisible)
 555                                  && !(prevX == -1 && prevY == -1)
 556                                  && !_track.getPoint(i).getSegmentStart())
 557                                 {
 558                                         inG.drawLine(prevX, prevY, px, py);
 559                                 }
 560                                 prevX = px; prevY = py;
 561                         }
 562                         prevPointVisible = currPointVisible;
 563                 }
 564
 565                 // Loop over points, just drawing blobs for waypoints
 566                 inG.setColor(textColour);
 567                 FontMetrics fm = inG.getFontMetrics();
 568                 int nameHeight = fm.getHeight();
 569                 int width = getWidth();
 570                 int height = getHeight();
 571                 if (anyWaypoints) {
 572                         for (int i=0; i<_track.getNumPoints(); i++)
 573                         {
 574                                 if (_track.getPoint(i).isWaypoint())
 575                                 {
 576                                         int px = getWidth() / 2 + _mapPosition.getXFromCentre(_track.getX(i));
 577                                         int py = getHeight() / 2 + _mapPosition.getYFromCentre(_track.getY(i));
 578                                         if (px >= 0 && px < getWidth() && py >= 0 && py < getHeight())
 579                                         {
 580                                                 inG.fillRect(px-3, py-3, 6, 6);
 581                                                 pointsPainted++;
 582                                         }
 583                                 }
 584                         }
 585                         // Loop over points again, now draw names for waypoints
 586                         for (int i=0; i<_track.getNumPoints(); i++)
 587                         {
 588                                 if (_track.getPoint(i).isWaypoint())
 589                                 {
 590                                         int px = getWidth() / 2 + _mapPosition.getXFromCentre(_track.getX(i));
 591                                         int py = getHeight() / 2 + _mapPosition.getYFromCentre(_track.getY(i));
 592                                         if (px >= 0 && px < getWidth() && py >= 0 && py < getHeight())
 593                                         {
 594                                                 // Figure out where to draw waypoint name so it doesn't obscure track
 595                                                 String waypointName = _track.getPoint(i).getWaypointName();
 596                                                 int nameWidth = fm.stringWidth(waypointName);
 597                                                 boolean drawnName = false;
 598                                                 // Make arrays for coordinates right left up down
 599                                                 int[] nameXs = {px + 2, px - nameWidth - 2, px - nameWidth/2, px - nameWidth/2};
 600                                                 int[] nameYs = {py + (nameHeight/2), py + (nameHeight/2), py - 2, py + nameHeight + 2};
 601                                                 for (int extraSpace = 4; extraSpace < 13 && !drawnName; extraSpace+=2)
 602                                                 {
 603                                                         // Shift arrays for coordinates right left up down
 604                                                         nameXs[0] += 2; nameXs[1] -= 2;
 605                                                         nameYs[2] -= 2; nameYs[3] += 2;
 606                                                         // Check each direction in turn right left up down
 607                                                         for (int a=0; a<4; a++)
 608                                                         {
 609                                                                 if (nameXs[a] > 0 && (nameXs[a] + nameWidth) < width
 610                                                                         && nameYs[a] < height && (nameYs[a] - nameHeight) > 0
 611                                                                         && !overlapsPoints(nameXs[a], nameYs[a], nameWidth, nameHeight, textColour))
 612                                                                 {
 613                                                                         // Found a rectangle to fit - draw name here and quit
 614                                                                         inG.drawString(waypointName, nameXs[a], nameYs[a]);
 615                                                                         drawnName = true;
 616                                                                         break;
 617                                                                 }
 618                                                         }
 619                                                 }
 620                                         }
 621                                 }
 622                         }
 623                 }
 624                 // Loop over points, drawing blobs for photo points
 625                 inG.setColor(secondColour);
 626                 for (int i=0; i<_track.getNumPoints(); i++)
 627                 {
 628                         if (_track.getPoint(i).getPhoto() != null)
 629                         {
 630                                 int px = getWidth() / 2 + _mapPosition.getXFromCentre(_track.getX(i));
 631                                 int py = getHeight() / 2 + _mapPosition.getYFromCentre(_track.getY(i));
 632                                 if (px >= 0 && px < getWidth() && py >= 0 && py < getHeight())
 633                                 {
 634                                         inG.drawRect(px-1, py-1, 2, 2);
 635                                         inG.drawRect(px-2, py-2, 4, 4);
 636                                         pointsPainted++;
 637                                 }
 638                         }
 639                 }
 640
 641                 // Draw selected range
 642                 if (_selection.hasRangeSelected())
 643                 {
 644                         inG.setColor(rangeColour);
 645                         for (int i=_selection.getStart(); i<=_selection.getEnd(); i++)
 646                         {
 647                                 int px = getWidth() / 2 + _mapPosition.getXFromCentre(_track.getX(i));
 648                                 int py = getHeight() / 2 + _mapPosition.getYFromCentre(_track.getY(i));
 649                                 inG.drawRect(px-1, py-1, 2, 2);
 650                         }
 651                 }
 652
 653                 // Draw selected point, crosshairs
 654                 int selectedPoint = _selection.getCurrentPointIndex();
 655                 if (selectedPoint >= 0)
 656                 {
 657                         int px = getWidth() / 2 + _mapPosition.getXFromCentre(_track.getX(selectedPoint));
 658                         int py = getHeight() / 2 + _mapPosition.getYFromCentre(_track.getY(selectedPoint));
 659                         inG.setColor(currentColour);
 660                         // crosshairs
 661                         inG.drawLine(px, 0, px, getHeight());
 662                         inG.drawLine(0, py, getWidth(), py);
 663                         // oval
 664                         inG.drawOval(px - 2, py - 2, 4, 4);
 665                         inG.drawOval(px - 3, py - 3, 6, 6);
 666                 }
 667                 // Return the number of points painted
 668                 return pointsPainted;
 669         }
 670
 671
 672         /**
 673          * Tests whether there are any dark pixels within the specified x,y rectangle
 674          * @param inX left X coordinate
 675          * @param inY bottom Y coordinate
 676          * @param inWidth width of rectangle
 677          * @param inHeight height of rectangle
 678          * @param inTextColour colour of text
 679          * @return true if the rectangle overlaps stuff too close to the given colour
 680          */
 681         private boolean overlapsPoints(int inX, int inY, int inWidth, int inHeight, Color inTextColour)
 682         {
 683                 // each of the colour channels must be further away than this to count as empty
 684                 final int BRIGHTNESS_LIMIT = 80;
 685                 final int textRGB = inTextColour.getRGB();
 686                 final int textLow = textRGB & 255;
 687                 final int textMid = (textRGB >> 8) & 255;
 688                 final int textHigh = (textRGB >> 16) & 255;
 689                 try
 690                 {
 691                         // loop over x coordinate of rectangle
 692                         for (int x=0; x<inWidth; x++)
 693                         {
 694                                 // loop over y coordinate of rectangle
 695                                 for (int y=0; y<inHeight; y++)
 696                                 {
 697                                         int pixelColor = _mapImage.getRGB(inX + x, inY - y);
 698                                         // split into four components rgba
 699                                         int pixLow = pixelColor & 255;
 700                                         int pixMid = (pixelColor >> 8) & 255;
 701                                         int pixHigh = (pixelColor >> 16) & 255;
 702                                         //int fourthBit = (pixelColor >> 24) & 255; // alpha ignored
 703                                         // If colours are too close in any channel then it's an overlap
 704                                         if (Math.abs(pixLow-textLow) < BRIGHTNESS_LIMIT ||
 705                                                 Math.abs(pixMid-textMid) < BRIGHTNESS_LIMIT ||
 706                                                 Math.abs(pixHigh-textHigh) < BRIGHTNESS_LIMIT) {return true;}
 707                                 }
 708                         }
 709                 }
 710                 catch (NullPointerException e) {
 711                         // ignore null pointers, just return false
 712                 }
 713                 return false;
 714         }
 715
 716
 717         /**
 718          * Inform that tiles have been updated and the map can be repainted
 719          * @param inIsOk true if data loaded ok, false for error
 720          */
 721         public synchronized void tilesUpdated(boolean inIsOk)
 722         {
 723                 // Show message if loading failed (but not too many times)
 724                 if (!inIsOk && !_shownOsmErrorAlready && _mapCheckBox.isSelected())
 725                 {
 726                         _shownOsmErrorAlready = true;
 727                         // use separate thread to show message about failing to load osm images
 728                         new Thread(new Runnable() {
 729                                 public void run() {
 730                                         try {Thread.sleep(500);} catch (InterruptedException ie) {}
 731                                         _app.showErrorMessage("error.osmimage.dialogtitle", "error.osmimage.failed");
 732                                 }
 733                         }).start();
 734                 }
 735                 _recalculate = true;
 736                 repaint();
 737         }
 738
 739         /**
 740          * Zoom out, if not already at minimum zoom
 741          */
 742         public void zoomOut()
 743         {
 744                 _mapPosition.zoomOut();
 745                 _recalculate = true;
 746                 repaint();
 747         }
 748
 749         /**
 750          * Zoom in, if not already at maximum zoom
 751          */
 752         public void zoomIn()
 753         {
 754                 _mapPosition.zoomIn();
 755                 _recalculate = true;
 756                 repaint();
 757         }
 758
 759         /**
 760          * Pan map
 761          * @param inDeltaX x shift
 762          * @param inDeltaY y shift
 763          */
 764         public void panMap(int inDeltaX, int inDeltaY)
 765         {
 766                 _mapPosition.pan(inDeltaX, inDeltaY);
 767                 _recalculate = true;
 768                 repaint();
 769         }
 770
 771         /**
 772          * @see javax.swing.JComponent#getMinimumSize()
 773          */
 774         public Dimension getMinimumSize()
 775         {
 776                 final Dimension minSize = new Dimension(512, 300);
 777                 return minSize;
 778         }
 779
 780         /**
 781          * @see javax.swing.JComponent#getPreferredSize()
 782          */
 783         public Dimension getPreferredSize()
 784         {
 785                 return getMinimumSize();
 786         }
 787
 788
 789         /**
 790          * Respond to mouse click events
 791          * @see java.awt.event.MouseListener#mouseClicked(java.awt.event.MouseEvent)
 792          */
 793         public void mouseClicked(MouseEvent inE)
 794         {
 795                 if (_track != null && _track.getNumPoints() > 0)
 796                 {
 797                          // select point if it's a left-click
 798                         if (!inE.isMetaDown())
 799                         {
 800                                 int pointIndex = _track.getNearestPointIndex(
 801                                          _mapPosition.getXFromPixels(inE.getX(), getWidth()),
 802                                          _mapPosition.getYFromPixels(inE.getY(), getHeight()),
 803                                          _mapPosition.getBoundsFromPixels(CLICK_SENSITIVITY), false);
 804                                 // Extend selection for shift-click
 805                                 if (inE.isShiftDown()) {
 806                                         _trackInfo.extendSelection(pointIndex);
 807                                 }
 808                                 else {
 809                                         _trackInfo.selectPoint(pointIndex);
 810                                 }
 811                         }
 812                         else
 813                         {
 814                                 // show the popup menu for right-clicks
 815                                 _popupMenuX = inE.getX();
 816                                 _popupMenuY = inE.getY();
 817                                 _popup.show(this, _popupMenuX, _popupMenuY);
 818                         }
 819                 }
 820         }
 821
 822         /**
 823          * Ignore mouse enter events
 824          * @see java.awt.event.MouseListener#mouseEntered(java.awt.event.MouseEvent)
 825          */
 826         public void mouseEntered(MouseEvent inE)
 827         {
 828                 // ignore
 829         }
 830
 831         /**
 832          * Ignore mouse exited events
 833          * @see java.awt.event.MouseListener#mouseExited(java.awt.event.MouseEvent)
 834          */
 835         public void mouseExited(MouseEvent inE)
 836         {
 837                 // ignore
 838         }
 839
 840         /**
 841          * Ignore mouse pressed events
 842          * @see java.awt.event.MouseListener#mousePressed(java.awt.event.MouseEvent)
 843          */
 844         public void mousePressed(MouseEvent inE)
 845         {
 846                 // ignore
 847         }
 848
 849         /**
 850          * Respond to mouse released events
 851          * @see java.awt.event.MouseListener#mouseReleased(java.awt.event.MouseEvent)
 852          */
 853         public void mouseReleased(MouseEvent inE)
 854         {
 855                 _recalculate = true;
 856                 if (_zoomDragging && Math.abs(_dragToX - _dragFromX) > 20 && Math.abs(_dragToY - _dragFromY) > 20)
 857                 {
 858                         //System.out.println("Finished zoom: " + _dragFromX + ", " + _dragFromY + " to " + _dragToX + ", " + _dragToY);
 859                         _mapPosition.zoomToPixels(_dragFromX, _dragToX, _dragFromY, _dragToY, getWidth(), getHeight());
 860                 }
 861                 _dragFromX = _dragFromY = -1;
 862                 _zoomDragging = false;
 863                 repaint();
 864         }
 865
 866         /**
 867          * Respond to mouse drag events
 868          * @see java.awt.event.MouseMotionListener#mouseDragged(java.awt.event.MouseEvent)
 869          */
 870         public void mouseDragged(MouseEvent inE)
 871         {
 872                 if (!inE.isMetaDown())
 873                 {
 874                         // Left mouse drag - pan map by appropriate amount
 875                         _zoomDragging = false;
 876                         if (_dragFromX != -1)
 877                         {
 878                                 panMap(_dragFromX - inE.getX(), _dragFromY - inE.getY());
 879                                 _recalculate = true;
 880                                 repaint();
 881                         }
 882                         _dragFromX = inE.getX();
 883                         _dragFromY = inE.getY();
 884                 }
 885                 else
 886                 {
 887                         // Right-click and drag - draw rectangle and control zoom
 888                         _zoomDragging = true;
 889                         if (_dragFromX == -1) {
 890                                 _dragFromX = inE.getX();
 891                                 _dragFromY = inE.getY();
 892                         }
 893                         _dragToX = inE.getX();
 894                         _dragToY = inE.getY();
 895                         repaint();
 896                 }
 897         }
 898
 899         /**
 900          * Respond to mouse move events without button pressed
 901          * @param inEvent ignored
 902          */
 903         public void mouseMoved(MouseEvent inEvent)
 904         {
 905                 // ignore
 906         }
 907
 908         /**
 909          * Respond to status bar message from broker
 910          * @param inMessage message, ignored
 911          */
 912         public void actionCompleted(String inMessage)
 913         {
 914                 // ignore
 915         }
 916
 917         /**
 918          * Respond to data updated message from broker
 919          * @param inUpdateType type of update
 920          */
 921         public void dataUpdated(byte inUpdateType)
 922         {
 923                 _recalculate = true;
 924                 if ((inUpdateType & DataSubscriber.DATA_ADDED_OR_REMOVED) > 0) {
 925                         _checkBounds = true;
 926                 }
 927                 if ((inUpdateType & DataSubscriber.MAPSERVER_CHANGED) > 0) {
 928                         _tileManager.resetConfig();
 929                 }
 930                 repaint();
 931                 // enable or disable components
 932                 boolean hasData = _track.getNumPoints() > 0;
 933                 _topPanel.setVisible(hasData);
 934                 _sidePanel.setVisible(hasData);
 935                 // grab focus for the key presses
 936                 this.requestFocus();
 937         }
 938
 939         /**
 940          * Respond to key presses on the map canvas
 941          * @param inE key event
 942          */
 943         public void keyPressed(KeyEvent inE)
 944         {
 945                 int code = inE.getKeyCode();
 946                 int currPointIndex = _selection.getCurrentPointIndex();
 947                 // Check for Ctrl key (for Linux/Win) or meta key (Clover key for Mac)
 948                 if (inE.isControlDown() || inE.isMetaDown())
 949                 {
 950                         // Check for arrow keys to zoom in and out
 951                         if (code == KeyEvent.VK_UP)
 952                                 zoomIn();
 953                         else if (code == KeyEvent.VK_DOWN)
 954                                 zoomOut();
 955                         // Key nav for next/prev point
 956                         else if (code == KeyEvent.VK_LEFT && currPointIndex > 0)
 957                                 _trackInfo.selectPoint(currPointIndex-1);
 958                         else if (code == KeyEvent.VK_RIGHT)
 959                                 _trackInfo.selectPoint(currPointIndex+1);
 960                         else if (code == KeyEvent.VK_PAGE_UP)
 961                                 _trackInfo.selectPoint(Checker.getPreviousSegmentStart(
 962                                         _trackInfo.getTrack(), _trackInfo.getSelection().getCurrentPointIndex()));
 963                         else if (code == KeyEvent.VK_PAGE_DOWN)
 964                                 _trackInfo.selectPoint(Checker.getNextSegmentStart(
 965                                         _trackInfo.getTrack(), _trackInfo.getSelection().getCurrentPointIndex()));
 966                         // Check for home and end
 967                         else if (code == KeyEvent.VK_HOME)
 968                                 _trackInfo.selectPoint(0);
 969                         else if (code == KeyEvent.VK_END)
 970                                 _trackInfo.selectPoint(_trackInfo.getTrack().getNumPoints()-1);
 971                 }
 972                 else
 973                 {
 974                         // Check for arrow keys to pan
 975                         int upwardsPan = 0;
 976                         if (code == KeyEvent.VK_UP)
 977                                 upwardsPan = -PAN_DISTANCE;
 978                         else if (code == KeyEvent.VK_DOWN)
 979                                 upwardsPan = PAN_DISTANCE;
 980                         int rightwardsPan = 0;
 981                         if (code == KeyEvent.VK_RIGHT)
 982                                 rightwardsPan = PAN_DISTANCE;
 983                         else if (code == KeyEvent.VK_LEFT)
 984                                 rightwardsPan = -PAN_DISTANCE;
 985                         panMap(rightwardsPan, upwardsPan);
 986                         // Check for backspace key to delete current point (delete key already handled by menu)
 987                         if (code == KeyEvent.VK_BACK_SPACE && currPointIndex >= 0) {
 988                                 _app.deleteCurrentPoint();
 989                         }
 990                 }
 991         }
 992
 993         /**
 994          * @param inE key released event, ignored
 995          */
 996         public void keyReleased(KeyEvent e)
 997         {
 998                 // ignore
 999         }
1000
1001         /**
1002          * @param inE key typed event, ignored
1003          */
1004         public void keyTyped(KeyEvent inE)
1005         {
1006                 // ignore
1007         }
1008
1009         /**
1010          * @param inE mouse wheel event indicating scroll direction
1011          */
1012         public void mouseWheelMoved(MouseWheelEvent inE)
1013         {
1014                 int clicks = inE.getWheelRotation();
1015                 if (clicks < 0)
1016                         zoomIn();
1017                 else if (clicks > 0)
1018                         zoomOut();
1019         }
1020
1021         /**
1022          * @return current map position
1023          */
1024         public MapPosition getMapPosition()
1025         {
1026                 return _mapPosition;
1027         }
1028 }