tim/prune/gui/map/MapCanvas.java

   1 package tim.prune.gui.map;
   2
   3 import java.awt.BasicStroke;
   4 import java.awt.BorderLayout;
   5 import java.awt.Color;
   6 import java.awt.Dimension;
   7 import java.awt.FlowLayout;
   8 import java.awt.FontMetrics;
   9 import java.awt.Graphics;
  10 import java.awt.Graphics2D;
  11 import java.awt.Image;
  12 import java.awt.RenderingHints;
  13 import java.awt.event.ActionEvent;
  14 import java.awt.event.ActionListener;
  15 import java.awt.event.ItemEvent;
  16 import java.awt.event.ItemListener;
  17 import java.awt.event.KeyEvent;
  18 import java.awt.event.KeyListener;
  19 import java.awt.event.MouseEvent;
  20 import java.awt.event.MouseListener;
  21 import java.awt.event.MouseMotionListener;
  22 import java.awt.event.MouseWheelEvent;
  23 import java.awt.event.MouseWheelListener;
  24 import java.awt.image.BufferedImage;
  25 import java.awt.image.RescaleOp;
  26
  27 import javax.swing.BorderFactory;
  28 import javax.swing.BoxLayout;
  29 import javax.swing.JButton;
  30 import javax.swing.JCheckBox;
  31 import javax.swing.JMenuItem;
  32 import javax.swing.JPanel;
  33 import javax.swing.JPopupMenu;
  34 import javax.swing.JSlider;
  35 import javax.swing.event.ChangeEvent;
  36 import javax.swing.event.ChangeListener;
  37
  38 import tim.prune.App;
  39 import tim.prune.DataSubscriber;
  40 import tim.prune.FunctionLibrary;
  41 import tim.prune.I18nManager;
  42 import tim.prune.UpdateMessageBroker;
  43 import tim.prune.config.ColourScheme;
  44 import tim.prune.config.Config;
  45 import tim.prune.data.Checker;
  46 import tim.prune.data.Coordinate;
  47 import tim.prune.data.DataPoint;
  48 import tim.prune.data.DoubleRange;
  49 import tim.prune.data.Latitude;
  50 import tim.prune.data.Longitude;
  51 import tim.prune.data.Selection;
  52 import tim.prune.data.Track;
  53 import tim.prune.data.TrackInfo;
  54 import tim.prune.gui.IconManager;
  55
  56 /**
  57  * Class for the map canvas, to display a background map and draw on it
  58  */
  59 public class MapCanvas extends JPanel implements MouseListener, MouseMotionListener, DataSubscriber,
  60         KeyListener, MouseWheelListener
  61 {
  62         /** App object for callbacks */
  63         private App _app = null;
  64         /** Track object */
  65         private Track _track = null;
  66         /** TrackInfo object */
  67         private TrackInfo _trackInfo = null;
  68         /** Selection object */
  69         private Selection _selection = null;
  70         /** Previously selected point */
  71         private int _prevSelectedPoint = -1;
  72         /** Tile manager */
  73         private MapTileManager _tileManager = new MapTileManager(this);
  74         /** Image to display */
  75         private BufferedImage _mapImage = null;
  76         /** Slider for transparency */
  77         private JSlider _transparencySlider = null;
  78         /** Checkbox for scale bar */
  79         private JCheckBox _scaleCheckBox = null;
  80         /** Checkbox for maps */
  81         private JCheckBox _mapCheckBox = null;
  82         /** Checkbox for autopan */
  83         private JCheckBox _autopanCheckBox = null;
  84         /** Checkbox for connecting track points */
  85         private JCheckBox _connectCheckBox = null;
  86         /** Right-click popup menu */
  87         private JPopupMenu _popup = null;
  88         /** Top component panel */
  89         private JPanel _topPanel = null;
  90         /** Side component panel */
  91         private JPanel _sidePanel = null;
  92         /** Scale bar */
  93         private ScaleBar _scaleBar = null;
  94         /* Data */
  95         private DoubleRange _latRange = null, _lonRange = null;
  96         private DoubleRange _xRange = null, _yRange = null;
  97         private boolean _recalculate = false;
  98         /** Flag to check bounds on next paint */
  99         private boolean _checkBounds = false;
 100         /** Map position */
 101         private MapPosition _mapPosition = null;
 102         /** x coordinate of drag from point */
 103         private int _dragFromX = -1;
 104         /** y coordinate of drag from point */
 105         private int _dragFromY = -1;
 106         /** Flag set to true for right-click dragging */
 107         private boolean _zoomDragging = false;
 108         /** x coordinate of drag to point */
 109         private int _dragToX = -1;
 110         /** y coordinate of drag to point */
 111         private int _dragToY = -1;
 112         /** x coordinate of popup menu */
 113         private int _popupMenuX = -1;
 114         /** y coordinate of popup menu */
 115         private int _popupMenuY = -1;
 116         /** Flag to prevent showing too often the error message about loading maps */
 117         private boolean _shownOsmErrorAlready = false;
 118
 119         /** Constant for click sensitivity when selecting nearest point */
 120         private static final int CLICK_SENSITIVITY = 10;
 121         /** Constant for pan distance from key presses */
 122         private static final int PAN_DISTANCE = 20;
 123         /** Constant for pan distance from autopan */
 124         private static final int AUTOPAN_DISTANCE = 75;
 125
 126         // Colours
 127         private static final Color COLOR_MESSAGES   = Color.GRAY;
 128
 129
 130         /**
 131          * Constructor
 132          * @param inApp App object for callbacks
 133          * @param inTrackInfo track info object
 134          */
 135         public MapCanvas(App inApp, TrackInfo inTrackInfo)
 136         {
 137                 _app = inApp;
 138                 _trackInfo = inTrackInfo;
 139                 _track = inTrackInfo.getTrack();
 140                 _selection = inTrackInfo.getSelection();
 141                 _mapPosition = new MapPosition();
 142                 addMouseListener(this);
 143                 addMouseMotionListener(this);
 144                 addMouseWheelListener(this);
 145                 addKeyListener(this);
 146
 147                 // Make listener for changes to controls
 148                 ItemListener itemListener = new ItemListener() {
 149                         public void itemStateChanged(ItemEvent e)
 150                         {
 151                                 _recalculate = true;
 152                                 repaint();
 153                         }
 154                 };
 155                 // Make special listener for changes to map checkbox
 156                 ItemListener mapCheckListener = new ItemListener() {
 157                         public void itemStateChanged(ItemEvent e)
 158                         {
 159                                 _tileManager.clearMemoryCaches();
 160                                 _recalculate = true;
 161                                 Config.setConfigBoolean(Config.KEY_SHOW_MAP, e.getStateChange() == ItemEvent.SELECTED);
 162                                 UpdateMessageBroker.informSubscribers(); // to let menu know
 163                         }
 164                 };
 165                 _topPanel = new JPanel();
 166                 _topPanel.setLayout(new FlowLayout());
 167                 _topPanel.setOpaque(false);
 168                 // Make slider for transparency
 169                 _transparencySlider = new JSlider(0, 5, 0);
 170                 _transparencySlider.setPreferredSize(new Dimension(100, 20));
 171                 _transparencySlider.setMajorTickSpacing(1);
 172                 _transparencySlider.setSnapToTicks(true);
 173                 _transparencySlider.setOpaque(false);
 174                 _transparencySlider.addChangeListener(new ChangeListener() {
 175                         public void stateChanged(ChangeEvent e)
 176                         {
 177                                 _recalculate = true;
 178                                 repaint();
 179                         }
 180                 });
 181                 _transparencySlider.setFocusable(false); // stop slider from stealing keyboard focus
 182                 _topPanel.add(_transparencySlider);
 183                 // Add checkbox button for enabling scale bar
 184                 _scaleCheckBox = new JCheckBox(IconManager.getImageIcon(IconManager.SCALEBAR_BUTTON), true);
 185                 _scaleCheckBox.setSelectedIcon(IconManager.getImageIcon(IconManager.SCALEBAR_BUTTON_ON));
 186                 _scaleCheckBox.setOpaque(false);
 187                 _scaleCheckBox.setToolTipText(I18nManager.getText("menu.map.showscalebar"));
 188                 _scaleCheckBox.addItemListener(new ItemListener() {
 189                         public void itemStateChanged(ItemEvent e) {
 190                                 _scaleBar.setVisible(_scaleCheckBox.isSelected());
 191                         }
 192                 });
 193                 _scaleCheckBox.setFocusable(false); // stop button from stealing keyboard focus
 194                 _topPanel.add(_scaleCheckBox);
 195                 // Add checkbox button for enabling maps or not
 196                 _mapCheckBox = new JCheckBox(IconManager.getImageIcon(IconManager.MAP_BUTTON), false);
 197                 _mapCheckBox.setSelectedIcon(IconManager.getImageIcon(IconManager.MAP_BUTTON_ON));
 198                 _mapCheckBox.setOpaque(false);
 199                 _mapCheckBox.setToolTipText(I18nManager.getText("menu.map.showmap"));
 200                 _mapCheckBox.addItemListener(mapCheckListener);
 201                 _mapCheckBox.setFocusable(false); // stop button from stealing keyboard focus
 202                 _topPanel.add(_mapCheckBox);
 203                 // Add checkbox button for enabling autopan or not
 204                 _autopanCheckBox = new JCheckBox(IconManager.getImageIcon(IconManager.AUTOPAN_BUTTON), true);
 205                 _autopanCheckBox.setSelectedIcon(IconManager.getImageIcon(IconManager.AUTOPAN_BUTTON_ON));
 206                 _autopanCheckBox.setOpaque(false);
 207                 _autopanCheckBox.setToolTipText(I18nManager.getText("menu.map.autopan"));
 208                 _autopanCheckBox.addItemListener(itemListener);
 209                 _autopanCheckBox.setFocusable(false); // stop button from stealing keyboard focus
 210                 _topPanel.add(_autopanCheckBox);
 211                 // Add checkbox button for connecting points or not
 212                 _connectCheckBox = new JCheckBox(IconManager.getImageIcon(IconManager.POINTS_DISCONNECTED_BUTTON), true);
 213                 _connectCheckBox.setSelectedIcon(IconManager.getImageIcon(IconManager.POINTS_CONNECTED_BUTTON));
 214                 _connectCheckBox.setOpaque(false);
 215                 _connectCheckBox.setToolTipText(I18nManager.getText("menu.map.connect"));
 216                 _connectCheckBox.addItemListener(itemListener);
 217                 _connectCheckBox.setFocusable(false); // stop button from stealing keyboard focus
 218                 _topPanel.add(_connectCheckBox);
 219
 220                 // Add zoom in, zoom out buttons
 221                 _sidePanel = new JPanel();
 222                 _sidePanel.setLayout(new BoxLayout(_sidePanel, BoxLayout.Y_AXIS));
 223                 _sidePanel.setOpaque(false);
 224                 JButton zoomInButton = new JButton(IconManager.getImageIcon(IconManager.ZOOM_IN_BUTTON));
 225                 zoomInButton.setBorder(BorderFactory.createEmptyBorder(3, 3, 3, 3));
 226                 zoomInButton.setContentAreaFilled(false);
 227                 zoomInButton.setToolTipText(I18nManager.getText("menu.map.zoomin"));
 228                 zoomInButton.addActionListener(new ActionListener() {
 229                         public void actionPerformed(ActionEvent e)
 230                         {
 231                                 zoomIn();
 232                         }
 233                 });
 234                 zoomInButton.setFocusable(false); // stop button from stealing keyboard focus
 235                 _sidePanel.add(zoomInButton);
 236                 JButton zoomOutButton = new JButton(IconManager.getImageIcon(IconManager.ZOOM_OUT_BUTTON));
 237                 zoomOutButton.setBorder(BorderFactory.createEmptyBorder(3, 3, 3, 3));
 238                 zoomOutButton.setContentAreaFilled(false);
 239                 zoomOutButton.setToolTipText(I18nManager.getText("menu.map.zoomout"));
 240                 zoomOutButton.addActionListener(new ActionListener() {
 241                         public void actionPerformed(ActionEvent e)
 242                         {
 243                                 zoomOut();
 244                         }
 245                 });
 246                 zoomOutButton.setFocusable(false); // stop button from stealing keyboard focus
 247                 _sidePanel.add(zoomOutButton);
 248
 249                 // Bottom panel for scale bar
 250                 _scaleBar = new ScaleBar();
 251
 252                 // add control panels to this one
 253                 setLayout(new BorderLayout());
 254                 _topPanel.setVisible(false);
 255                 _sidePanel.setVisible(false);
 256                 add(_topPanel, BorderLayout.NORTH);
 257                 add(_sidePanel, BorderLayout.WEST);
 258                 add(_scaleBar, BorderLayout.SOUTH);
 259                 // Make popup menu
 260                 makePopup();
 261         }
 262
 263
 264         /**
 265          * Make the popup menu for right-clicking the map
 266          */
 267         private void makePopup()
 268         {
 269                 _popup = new JPopupMenu();
 270                 JMenuItem zoomInItem = new JMenuItem(I18nManager.getText("menu.map.zoomin"));
 271                 zoomInItem.addActionListener(new ActionListener() {
 272                         public void actionPerformed(ActionEvent e)
 273                         {
 274                                 zoomIn();
 275                         }});
 276                 zoomInItem.setEnabled(true);
 277                 _popup.add(zoomInItem);
 278                 JMenuItem zoomOutItem = new JMenuItem(I18nManager.getText("menu.map.zoomout"));
 279                 zoomOutItem.addActionListener(new ActionListener() {
 280                         public void actionPerformed(ActionEvent e)
 281                         {
 282                                 zoomOut();
 283                         }});
 284                 zoomOutItem.setEnabled(true);
 285                 _popup.add(zoomOutItem);
 286                 JMenuItem zoomFullItem = new JMenuItem(I18nManager.getText("menu.map.zoomfull"));
 287                 zoomFullItem.addActionListener(new ActionListener() {
 288                         public void actionPerformed(ActionEvent e)
 289                         {
 290                                 zoomToFit();
 291                                 _recalculate = true;
 292                                 repaint();
 293                         }});
 294                 zoomFullItem.setEnabled(true);
 295                 _popup.add(zoomFullItem);
 296                 _popup.addSeparator();
 297                 // Set background
 298                 JMenuItem setMapBgItem = new JMenuItem(
 299                         I18nManager.getText(FunctionLibrary.FUNCTION_SET_MAP_BG.getNameKey()));
 300                 setMapBgItem.addActionListener(new ActionListener() {
 301                         public void actionPerformed(ActionEvent e)
 302                         {
 303                                 FunctionLibrary.FUNCTION_SET_MAP_BG.begin();
 304                         }});
 305                 _popup.add(setMapBgItem);
 306                 // new point option
 307                 JMenuItem newPointItem = new JMenuItem(I18nManager.getText("menu.map.newpoint"));
 308                 newPointItem.addActionListener(new ActionListener() {
 309                         public void actionPerformed(ActionEvent e)
 310                         {
 311                                 double lat = MapUtils.getLatitudeFromY(_mapPosition.getYFromPixels(_popupMenuY, getHeight()));
 312                                 double lon = MapUtils.getLongitudeFromX(_mapPosition.getXFromPixels(_popupMenuX, getWidth()));
 313                                 _app.createPoint(new DataPoint(new Latitude(lat, Coordinate.FORMAT_NONE),
 314                                         new Longitude(lon, Coordinate.FORMAT_NONE), null));
 315                         }});
 316                 newPointItem.setEnabled(true);
 317                 _popup.add(newPointItem);
 318         }
 319
 320
 321         /**
 322          * Zoom to fit the current data area
 323          */
 324         private void zoomToFit()
 325         {
 326                 _latRange = _track.getLatRange();
 327                 _lonRange = _track.getLonRange();
 328                 _xRange = new DoubleRange(MapUtils.getXFromLongitude(_lonRange.getMinimum()),
 329                         MapUtils.getXFromLongitude(_lonRange.getMaximum()));
 330                 _yRange = new DoubleRange(MapUtils.getYFromLatitude(_latRange.getMinimum()),
 331                         MapUtils.getYFromLatitude(_latRange.getMaximum()));
 332                 _mapPosition.zoomToXY(_xRange.getMinimum(), _xRange.getMaximum(), _yRange.getMinimum(), _yRange.getMaximum(),
 333                                 getWidth(), getHeight());
 334         }
 335
 336
 337         /**
 338          * Paint method
 339          * @see java.awt.Canvas#paint(java.awt.Graphics)
 340          */
 341         public void paint(Graphics inG)
 342         {
 343                 super.paint(inG);
 344                 if (_mapImage != null && (_mapImage.getWidth() != getWidth() || _mapImage.getHeight() != getHeight())) {
 345                         _mapImage = null;
 346                 }
 347                 if (_track.getNumPoints() > 0)
 348                 {
 349                         // Check for autopan if enabled / necessary
 350                         if (_autopanCheckBox.isSelected())
 351                         {
 352                                 int selectedPoint = _selection.getCurrentPointIndex();
 353                                 if (selectedPoint >= 0 && _dragFromX == -1 && selectedPoint != _prevSelectedPoint)
 354                                 {
 355                                         int px = getWidth() / 2 + _mapPosition.getXFromCentre(_track.getX(selectedPoint));
 356                                         int py = getHeight() / 2 + _mapPosition.getYFromCentre(_track.getY(selectedPoint));
 357                                         int panX = 0;
 358                                         int panY = 0;
 359                                         if (px < PAN_DISTANCE) {
 360                                                 panX = px - AUTOPAN_DISTANCE;
 361                                         }
 362                                         else if (px > (getWidth()-PAN_DISTANCE)) {
 363                                                 panX = AUTOPAN_DISTANCE + px - getWidth();
 364                                         }
 365                                         if (py < PAN_DISTANCE) {
 366                                                 panY = py - AUTOPAN_DISTANCE;
 367                                         }
 368                                         if (py > (getHeight()-PAN_DISTANCE)) {
 369                                                 panY = AUTOPAN_DISTANCE + py - getHeight();
 370                                         }
 371                                         if (panX != 0 || panY != 0) {
 372                                                 _mapPosition.pan(panX, panY);
 373                                         }
 374                                 }
 375                                 _prevSelectedPoint = selectedPoint;
 376                         }
 377
 378                         // Draw the map contents if necessary
 379                         if ((_mapImage == null || _recalculate))
 380                         {
 381                                 paintMapContents();
 382                                 _scaleBar.updateScale(_mapPosition.getZoom(), _mapPosition.getYFromPixels(0, 0));
 383                         }
 384                         // Draw the prepared image onto the panel
 385                         if (_mapImage != null) {
 386                                 inG.drawImage(_mapImage, 0, 0, getWidth(), getHeight(), null);
 387                         }
 388                         // Draw the zoom rectangle if necessary
 389                         if (_zoomDragging)
 390                         {
 391                                 inG.setColor(Color.RED);
 392                                 inG.drawLine(_dragFromX, _dragFromY, _dragFromX, _dragToY);
 393                                 inG.drawLine(_dragFromX, _dragFromY, _dragToX, _dragFromY);
 394                                 inG.drawLine(_dragToX, _dragFromY, _dragToX, _dragToY);
 395                                 inG.drawLine(_dragFromX, _dragToY, _dragToX, _dragToY);
 396                         }
 397                 }
 398                 else
 399                 {
 400                         inG.setColor(Config.getColourScheme().getColour(ColourScheme.IDX_BACKGROUND));
 401                         inG.fillRect(0, 0, getWidth(), getHeight());
 402                         inG.setColor(COLOR_MESSAGES);
 403                         inG.drawString(I18nManager.getText("display.nodata"), 50, getHeight()/2);
 404                         _scaleBar.updateScale(-1, 0);
 405                 }
 406                 // Draw slider etc on top
 407                 paintChildren(inG);
 408         }
 409
 410
 411         /**
 412          * Paint the map tiles and the points on to the _mapImage
 413          */
 414         private void paintMapContents()
 415         {
 416                 if (_mapImage == null || _mapImage.getWidth() != getWidth() || _mapImage.getHeight() != getHeight())
 417                 {
 418                         _mapImage = new BufferedImage(getWidth(), getHeight(), BufferedImage.TYPE_INT_RGB);
 419                 }
 420
 421                 // Clear map
 422                 Graphics g = _mapImage.getGraphics();
 423                 // Clear to background
 424                 g.setColor(Config.getColourScheme().getColour(ColourScheme.IDX_BACKGROUND));
 425                 g.fillRect(0, 0, getWidth(), getHeight());
 426
 427                 // Check whether maps are on or not
 428                 boolean showMap = Config.getConfigBoolean(Config.KEY_SHOW_MAP);
 429                 _mapCheckBox.setSelected(showMap);
 430
 431                 // reset error message
 432                 if (!showMap) {_shownOsmErrorAlready = false;}
 433                 _recalculate = false;
 434                 // Only get map tiles if selected
 435                 if (showMap)
 436                 {
 437                         // init tile cacher
 438                         _tileManager.centreMap(_mapPosition.getZoom(), _mapPosition.getCentreTileX(), _mapPosition.getCentreTileY());
 439
 440                         boolean loadingFailed = false;
 441                         if (_mapImage == null) return;
 442
 443                         if (_tileManager.isOverzoomed())
 444                         {
 445                                 // display overzoom message
 446                                 g.setColor(COLOR_MESSAGES);
 447                                 g.drawString(I18nManager.getText("map.overzoom"), 50, getHeight()/2);
 448                         }
 449                         else
 450                         {
 451                                 int numLayers = _tileManager.getNumLayers();
 452                                 // Loop over tiles drawing each one
 453                                 int[] tileIndices = _mapPosition.getTileIndices(getWidth(), getHeight());
 454                                 int[] pixelOffsets = _mapPosition.getDisplayOffsets(getWidth(), getHeight());
 455                                 for (int tileX = tileIndices[0]; tileX <= tileIndices[1] && !loadingFailed; tileX++)
 456                                 {
 457                                         int x = (tileX - tileIndices[0]) * 256 - pixelOffsets[0];
 458                                         for (int tileY = tileIndices[2]; tileY <= tileIndices[3]; tileY++)
 459                                         {
 460                                                 int y = (tileY - tileIndices[2]) * 256 - pixelOffsets[1];
 461                                                 // Loop over layers
 462                                                 for (int l=0; l<numLayers; l++)
 463                                                 {
 464                                                         Image image = _tileManager.getTile(l, tileX, tileY);
 465                                                         if (image != null) {
 466                                                                 g.drawImage(image, x, y, 256, 256, null);
 467                                                         }
 468                                                 }
 469                                         }
 470                                 }
 471
 472                                 // Make maps brighter / fainter
 473                                 final float[] scaleFactors = {1.0f, 1.05f, 1.1f, 1.2f, 1.6f, 2.2f};
 474                                 final float scaleFactor = scaleFactors[_transparencySlider.getValue()];
 475                                 if (scaleFactor > 1.0f)
 476                                 {
 477                                         RenderingHints hints = new RenderingHints(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_OFF);
 478                                         hints.put(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
 479                                         RescaleOp op = new RescaleOp(scaleFactor, 0, hints);
 480                                         op.filter(_mapImage, _mapImage);
 481                                 }
 482                         }
 483                 }
 484
 485                 // Paint the track points on top
 486                 int pointsPainted = 1;
 487                 try
 488                 {
 489                         pointsPainted = paintPoints(g);
 490                 }
 491                 catch (NullPointerException npe) { // ignore, probably due to data being changed during drawing
 492                 }
 493
 494                 // free g
 495                 g.dispose();
 496
 497                 // Zoom to fit if no points found
 498                 if (pointsPainted <= 0 && _checkBounds) {
 499                         zoomToFit();
 500                         _recalculate = true;
 501                         repaint();
 502                 }
 503                 _checkBounds = false;
 504                 // enable / disable transparency slider
 505                 _transparencySlider.setEnabled(showMap);
 506         }
 507
 508
 509         /**
 510          * Paint the points using the given graphics object
 511          * @param inG Graphics object to use for painting
 512          * @return number of points painted, if any
 513          */
 514         private int paintPoints(Graphics inG)
 515         {
 516                 // Set up colours
 517                 final Color pointColour = Config.getColourScheme().getColour(ColourScheme.IDX_POINT);
 518                 final Color rangeColour = Config.getColourScheme().getColour(ColourScheme.IDX_SELECTION);
 519                 final Color currentColour = Config.getColourScheme().getColour(ColourScheme.IDX_PRIMARY);
 520                 final Color secondColour = Config.getColourScheme().getColour(ColourScheme.IDX_SECONDARY);
 521                 final Color textColour = Config.getColourScheme().getColour(ColourScheme.IDX_TEXT);
 522
 523                 // try to set double line width for painting
 524                 if (inG instanceof Graphics2D) {
 525                         ((Graphics2D) inG).setStroke(new BasicStroke(2.0f));
 526                 }
 527                 int pointsPainted = 0;
 528                 // draw track points
 529                 inG.setColor(pointColour);
 530                 int prevX = -1, prevY = -1;
 531                 boolean connectPoints = _connectCheckBox.isSelected();
 532                 boolean prevPointVisible = false, currPointVisible = false;
 533                 boolean anyWaypoints = false;
 534                 boolean isWaypoint = false;
 535                 for (int i=0; i<_track.getNumPoints(); i++)
 536                 {
 537                         int px = getWidth() / 2 + _mapPosition.getXFromCentre(_track.getX(i));
 538                         int py = getHeight() / 2 + _mapPosition.getYFromCentre(_track.getY(i));
 539                         currPointVisible = px >= 0 && px < getWidth() && py >= 0 && py < getHeight();
 540                         isWaypoint = _track.getPoint(i).isWaypoint();
 541                         anyWaypoints = anyWaypoints || isWaypoint;
 542                         if (currPointVisible)
 543                         {
 544                                 if (!isWaypoint)
 545                                 {
 546                                         // Draw rectangle for track point
 547                                         if (_track.getPoint(i).getDeleteFlag()) {
 548                                                 inG.setColor(currentColour);
 549                                         }
 550                                         else {
 551                                                 inG.setColor(pointColour);
 552                                         }
 553                                         inG.drawRect(px-2, py-2, 3, 3);
 554                                         pointsPainted++;
 555                                 }
 556                         }
 557                         if (!isWaypoint)
 558                         {
 559                                 // Connect track points if either of them are visible
 560                                 if (connectPoints && (currPointVisible || prevPointVisible)
 561                                  && !(prevX == -1 && prevY == -1)
 562                                  && !_track.getPoint(i).getSegmentStart())
 563                                 {
 564                                         inG.drawLine(prevX, prevY, px, py);
 565                                 }
 566                                 prevX = px; prevY = py;
 567                         }
 568                         prevPointVisible = currPointVisible;
 569                 }
 570
 571                 // Loop over points, just drawing blobs for waypoints
 572                 inG.setColor(textColour);
 573                 FontMetrics fm = inG.getFontMetrics();
 574                 int nameHeight = fm.getHeight();
 575                 int width = getWidth();
 576                 int height = getHeight();
 577                 if (anyWaypoints) {
 578                         for (int i=0; i<_track.getNumPoints(); i++)
 579                         {
 580                                 if (_track.getPoint(i).isWaypoint())
 581                                 {
 582                                         int px = getWidth() / 2 + _mapPosition.getXFromCentre(_track.getX(i));
 583                                         int py = getHeight() / 2 + _mapPosition.getYFromCentre(_track.getY(i));
 584                                         if (px >= 0 && px < getWidth() && py >= 0 && py < getHeight())
 585                                         {
 586                                                 inG.fillRect(px-3, py-3, 6, 6);
 587                                                 pointsPainted++;
 588                                         }
 589                                 }
 590                         }
 591                         // Loop over points again, now draw names for waypoints
 592                         for (int i=0; i<_track.getNumPoints(); i++)
 593                         {
 594                                 if (_track.getPoint(i).isWaypoint())
 595                                 {
 596                                         int px = getWidth() / 2 + _mapPosition.getXFromCentre(_track.getX(i));
 597                                         int py = getHeight() / 2 + _mapPosition.getYFromCentre(_track.getY(i));
 598                                         if (px >= 0 && px < getWidth() && py >= 0 && py < getHeight())
 599                                         {
 600                                                 // Figure out where to draw waypoint name so it doesn't obscure track
 601                                                 String waypointName = _track.getPoint(i).getWaypointName();
 602                                                 int nameWidth = fm.stringWidth(waypointName);
 603                                                 boolean drawnName = false;
 604                                                 // Make arrays for coordinates right left up down
 605                                                 int[] nameXs = {px + 2, px - nameWidth - 2, px - nameWidth/2, px - nameWidth/2};
 606                                                 int[] nameYs = {py + (nameHeight/2), py + (nameHeight/2), py - 2, py + nameHeight + 2};
 607                                                 for (int extraSpace = 4; extraSpace < 13 && !drawnName; extraSpace+=2)
 608                                                 {
 609                                                         // Shift arrays for coordinates right left up down
 610                                                         nameXs[0] += 2; nameXs[1] -= 2;
 611                                                         nameYs[2] -= 2; nameYs[3] += 2;
 612                                                         // Check each direction in turn right left up down
 613                                                         for (int a=0; a<4; a++)
 614                                                         {
 615                                                                 if (nameXs[a] > 0 && (nameXs[a] + nameWidth) < width
 616                                                                         && nameYs[a] < height && (nameYs[a] - nameHeight) > 0
 617                                                                         && !overlapsPoints(nameXs[a], nameYs[a], nameWidth, nameHeight, textColour))
 618                                                                 {
 619                                                                         // Found a rectangle to fit - draw name here and quit
 620                                                                         inG.drawString(waypointName, nameXs[a], nameYs[a]);
 621                                                                         drawnName = true;
 622                                                                         break;
 623                                                                 }
 624                                                         }
 625                                                 }
 626                                         }
 627                                 }
 628                         }
 629                 }
 630                 // Loop over points, drawing blobs for photo points
 631                 inG.setColor(secondColour);
 632                 for (int i=0; i<_track.getNumPoints(); i++)
 633                 {
 634                         if (_track.getPoint(i).getPhoto() != null)
 635                         {
 636                                 int px = getWidth() / 2 + _mapPosition.getXFromCentre(_track.getX(i));
 637                                 int py = getHeight() / 2 + _mapPosition.getYFromCentre(_track.getY(i));
 638                                 if (px >= 0 && px < getWidth() && py >= 0 && py < getHeight())
 639                                 {
 640                                         inG.drawRect(px-1, py-1, 2, 2);
 641                                         inG.drawRect(px-2, py-2, 4, 4);
 642                                         pointsPainted++;
 643                                 }
 644                         }
 645                 }
 646
 647                 // Draw selected range
 648                 if (_selection.hasRangeSelected())
 649                 {
 650                         inG.setColor(rangeColour);
 651                         for (int i=_selection.getStart(); i<=_selection.getEnd(); i++)
 652                         {
 653                                 int px = getWidth() / 2 + _mapPosition.getXFromCentre(_track.getX(i));
 654                                 int py = getHeight() / 2 + _mapPosition.getYFromCentre(_track.getY(i));
 655                                 inG.drawRect(px-1, py-1, 2, 2);
 656                         }
 657                 }
 658
 659                 // Draw selected point, crosshairs
 660                 int selectedPoint = _selection.getCurrentPointIndex();
 661                 if (selectedPoint >= 0)
 662                 {
 663                         int px = getWidth() / 2 + _mapPosition.getXFromCentre(_track.getX(selectedPoint));
 664                         int py = getHeight() / 2 + _mapPosition.getYFromCentre(_track.getY(selectedPoint));
 665                         inG.setColor(currentColour);
 666                         // crosshairs
 667                         inG.drawLine(px, 0, px, getHeight());
 668                         inG.drawLine(0, py, getWidth(), py);
 669                         // oval
 670                         inG.drawOval(px - 2, py - 2, 4, 4);
 671                         inG.drawOval(px - 3, py - 3, 6, 6);
 672                 }
 673                 // Return the number of points painted
 674                 return pointsPainted;
 675         }
 676
 677
 678         /**
 679          * Tests whether there are any dark pixels within the specified x,y rectangle
 680          * @param inX left X coordinate
 681          * @param inY bottom Y coordinate
 682          * @param inWidth width of rectangle
 683          * @param inHeight height of rectangle
 684          * @param inTextColour colour of text
 685          * @return true if the rectangle overlaps stuff too close to the given colour
 686          */
 687         private boolean overlapsPoints(int inX, int inY, int inWidth, int inHeight, Color inTextColour)
 688         {
 689                 // each of the colour channels must be further away than this to count as empty
 690                 final int BRIGHTNESS_LIMIT = 80;
 691                 final int textRGB = inTextColour.getRGB();
 692                 final int textLow = textRGB & 255;
 693                 final int textMid = (textRGB >> 8) & 255;
 694                 final int textHigh = (textRGB >> 16) & 255;
 695                 try
 696                 {
 697                         // loop over x coordinate of rectangle
 698                         for (int x=0; x<inWidth; x++)
 699                         {
 700                                 // loop over y coordinate of rectangle
 701                                 for (int y=0; y<inHeight; y++)
 702                                 {
 703                                         int pixelColor = _mapImage.getRGB(inX + x, inY - y);
 704                                         // split into four components rgba
 705                                         int pixLow = pixelColor & 255;
 706                                         int pixMid = (pixelColor >> 8) & 255;
 707                                         int pixHigh = (pixelColor >> 16) & 255;
 708                                         //int fourthBit = (pixelColor >> 24) & 255; // alpha ignored
 709                                         // If colours are too close in any channel then it's an overlap
 710                                         if (Math.abs(pixLow-textLow) < BRIGHTNESS_LIMIT ||
 711                                                 Math.abs(pixMid-textMid) < BRIGHTNESS_LIMIT ||
 712                                                 Math.abs(pixHigh-textHigh) < BRIGHTNESS_LIMIT) {return true;}
 713                                 }
 714                         }
 715                 }
 716                 catch (NullPointerException e) {
 717                         // ignore null pointers, just return false
 718                 }
 719                 return false;
 720         }
 721
 722
 723         /**
 724          * Inform that tiles have been updated and the map can be repainted
 725          * @param inIsOk true if data loaded ok, false for error
 726          */
 727         public synchronized void tilesUpdated(boolean inIsOk)
 728         {
 729                 // Show message if loading failed (but not too many times)
 730                 if (!inIsOk && !_shownOsmErrorAlready && _mapCheckBox.isSelected())
 731                 {
 732                         _shownOsmErrorAlready = true;
 733                         // use separate thread to show message about failing to load osm images
 734                         new Thread(new Runnable() {
 735                                 public void run() {
 736                                         try {Thread.sleep(500);} catch (InterruptedException ie) {}
 737                                         _app.showErrorMessage("error.osmimage.dialogtitle", "error.osmimage.failed");
 738                                 }
 739                         }).start();
 740                 }
 741                 _recalculate = true;
 742                 repaint();
 743         }
 744
 745         /**
 746          * Zoom out, if not already at minimum zoom
 747          */
 748         public void zoomOut()
 749         {
 750                 _mapPosition.zoomOut();
 751                 _recalculate = true;
 752                 repaint();
 753         }
 754
 755         /**
 756          * Zoom in, if not already at maximum zoom
 757          */
 758         public void zoomIn()
 759         {
 760                 _mapPosition.zoomIn();
 761                 _recalculate = true;
 762                 repaint();
 763         }
 764
 765         /**
 766          * Pan map
 767          * @param inDeltaX x shift
 768          * @param inDeltaY y shift
 769          */
 770         public void panMap(int inDeltaX, int inDeltaY)
 771         {
 772                 _mapPosition.pan(inDeltaX, inDeltaY);
 773                 _recalculate = true;
 774                 repaint();
 775         }
 776
 777         /**
 778          * @see javax.swing.JComponent#getMinimumSize()
 779          */
 780         public Dimension getMinimumSize()
 781         {
 782                 final Dimension minSize = new Dimension(512, 300);
 783                 return minSize;
 784         }
 785
 786         /**
 787          * @see javax.swing.JComponent#getPreferredSize()
 788          */
 789         public Dimension getPreferredSize()
 790         {
 791                 return getMinimumSize();
 792         }
 793
 794
 795         /**
 796          * Respond to mouse click events
 797          * @see java.awt.event.MouseListener#mouseClicked(java.awt.event.MouseEvent)
 798          */
 799         public void mouseClicked(MouseEvent inE)
 800         {
 801                 if (_track != null && _track.getNumPoints() > 0)
 802                 {
 803                          // select point if it's a left-click
 804                         if (!inE.isMetaDown())
 805                         {
 806                                 if (inE.getClickCount() == 1)
 807                                 {
 808                                         // single click
 809                                         int pointIndex = _track.getNearestPointIndex(
 810                                                  _mapPosition.getXFromPixels(inE.getX(), getWidth()),
 811                                                  _mapPosition.getYFromPixels(inE.getY(), getHeight()),
 812                                                  _mapPosition.getBoundsFromPixels(CLICK_SENSITIVITY), false);
 813                                         // Extend selection for shift-click
 814                                         if (inE.isShiftDown()) {
 815                                                 _trackInfo.extendSelection(pointIndex);
 816                                         }
 817                                         else {
 818                                                 _trackInfo.selectPoint(pointIndex);
 819                                         }
 820                                 }
 821                                 else if (inE.getClickCount() == 2) {
 822                                         // double click
 823                                         panMap(inE.getX() - getWidth()/2, inE.getY() - getHeight()/2);
 824                                         zoomIn();
 825                                 }
 826                         }
 827                         else
 828                         {
 829                                 // show the popup menu for right-clicks
 830                                 _popupMenuX = inE.getX();
 831                                 _popupMenuY = inE.getY();
 832                                 _popup.show(this, _popupMenuX, _popupMenuY);
 833                         }
 834                 }
 835         }
 836
 837         /**
 838          * Ignore mouse enter events
 839          * @see java.awt.event.MouseListener#mouseEntered(java.awt.event.MouseEvent)
 840          */
 841         public void mouseEntered(MouseEvent inE)
 842         {
 843                 // ignore
 844         }
 845
 846         /**
 847          * Ignore mouse exited events
 848          * @see java.awt.event.MouseListener#mouseExited(java.awt.event.MouseEvent)
 849          */
 850         public void mouseExited(MouseEvent inE)
 851         {
 852                 // ignore
 853         }
 854
 855         /**
 856          * Ignore mouse pressed events
 857          * @see java.awt.event.MouseListener#mousePressed(java.awt.event.MouseEvent)
 858          */
 859         public void mousePressed(MouseEvent inE)
 860         {
 861                 // ignore
 862         }
 863
 864         /**
 865          * Respond to mouse released events
 866          * @see java.awt.event.MouseListener#mouseReleased(java.awt.event.MouseEvent)
 867          */
 868         public void mouseReleased(MouseEvent inE)
 869         {
 870                 _recalculate = true;
 871                 if (_zoomDragging && Math.abs(_dragToX - _dragFromX) > 20 && Math.abs(_dragToY - _dragFromY) > 20)
 872                 {
 873                         //System.out.println("Finished zoom: " + _dragFromX + ", " + _dragFromY + " to " + _dragToX + ", " + _dragToY);
 874                         _mapPosition.zoomToPixels(_dragFromX, _dragToX, _dragFromY, _dragToY, getWidth(), getHeight());
 875                 }
 876                 _dragFromX = _dragFromY = -1;
 877                 _zoomDragging = false;
 878                 repaint();
 879         }
 880
 881         /**
 882          * Respond to mouse drag events
 883          * @see java.awt.event.MouseMotionListener#mouseDragged(java.awt.event.MouseEvent)
 884          */
 885         public void mouseDragged(MouseEvent inE)
 886         {
 887                 if (!inE.isMetaDown())
 888                 {
 889                         // Left mouse drag - pan map by appropriate amount
 890                         _zoomDragging = false;
 891                         if (_dragFromX != -1)
 892                         {
 893                                 panMap(_dragFromX - inE.getX(), _dragFromY - inE.getY());
 894                                 _recalculate = true;
 895                                 repaint();
 896                         }
 897                         _dragFromX = inE.getX();
 898                         _dragFromY = inE.getY();
 899                 }
 900                 else
 901                 {
 902                         // Right-click and drag - draw rectangle and control zoom
 903                         _zoomDragging = true;
 904                         if (_dragFromX == -1) {
 905                                 _dragFromX = inE.getX();
 906                                 _dragFromY = inE.getY();
 907                         }
 908                         _dragToX = inE.getX();
 909                         _dragToY = inE.getY();
 910                         repaint();
 911                 }
 912         }
 913
 914         /**
 915          * Respond to mouse move events without button pressed
 916          * @param inEvent ignored
 917          */
 918         public void mouseMoved(MouseEvent inEvent)
 919         {
 920                 // ignore
 921         }
 922
 923         /**
 924          * Respond to status bar message from broker
 925          * @param inMessage message, ignored
 926          */
 927         public void actionCompleted(String inMessage)
 928         {
 929                 // ignore
 930         }
 931
 932         /**
 933          * Respond to data updated message from broker
 934          * @param inUpdateType type of update
 935          */
 936         public void dataUpdated(byte inUpdateType)
 937         {
 938                 _recalculate = true;
 939                 if ((inUpdateType & DataSubscriber.DATA_ADDED_OR_REMOVED) > 0) {
 940                         _checkBounds = true;
 941                 }
 942                 if ((inUpdateType & DataSubscriber.MAPSERVER_CHANGED) > 0) {
 943                         _tileManager.resetConfig();
 944                 }
 945                 repaint();
 946                 // enable or disable components
 947                 boolean hasData = _track.getNumPoints() > 0;
 948                 _topPanel.setVisible(hasData);
 949                 _sidePanel.setVisible(hasData);
 950                 // grab focus for the key presses
 951                 this.requestFocus();
 952         }
 953
 954         /**
 955          * Respond to key presses on the map canvas
 956          * @param inE key event
 957          */
 958         public void keyPressed(KeyEvent inE)
 959         {
 960                 int code = inE.getKeyCode();
 961                 int currPointIndex = _selection.getCurrentPointIndex();
 962                 // Check for Ctrl key (for Linux/Win) or meta key (Clover key for Mac)
 963                 if (inE.isControlDown() || inE.isMetaDown())
 964                 {
 965                         // Check for arrow keys to zoom in and out
 966                         if (code == KeyEvent.VK_UP)
 967                                 zoomIn();
 968                         else if (code == KeyEvent.VK_DOWN)
 969                                 zoomOut();
 970                         // Key nav for next/prev point
 971                         else if (code == KeyEvent.VK_LEFT && currPointIndex > 0)
 972                                 _trackInfo.selectPoint(currPointIndex-1);
 973                         else if (code == KeyEvent.VK_RIGHT)
 974                                 _trackInfo.selectPoint(currPointIndex+1);
 975                         else if (code == KeyEvent.VK_PAGE_UP)
 976                                 _trackInfo.selectPoint(Checker.getPreviousSegmentStart(
 977                                         _trackInfo.getTrack(), _trackInfo.getSelection().getCurrentPointIndex()));
 978                         else if (code == KeyEvent.VK_PAGE_DOWN)
 979                                 _trackInfo.selectPoint(Checker.getNextSegmentStart(
 980                                         _trackInfo.getTrack(), _trackInfo.getSelection().getCurrentPointIndex()));
 981                         // Check for home and end
 982                         else if (code == KeyEvent.VK_HOME)
 983                                 _trackInfo.selectPoint(0);
 984                         else if (code == KeyEvent.VK_END)
 985                                 _trackInfo.selectPoint(_trackInfo.getTrack().getNumPoints()-1);
 986                 }
 987                 else
 988                 {
 989                         // Check for arrow keys to pan
 990                         int upwardsPan = 0;
 991                         if (code == KeyEvent.VK_UP)
 992                                 upwardsPan = -PAN_DISTANCE;
 993                         else if (code == KeyEvent.VK_DOWN)
 994                                 upwardsPan = PAN_DISTANCE;
 995                         int rightwardsPan = 0;
 996                         if (code == KeyEvent.VK_RIGHT)
 997                                 rightwardsPan = PAN_DISTANCE;
 998                         else if (code == KeyEvent.VK_LEFT)
 999                                 rightwardsPan = -PAN_DISTANCE;
1000                         panMap(rightwardsPan, upwardsPan);
1001                         // Check for backspace key to delete current point (delete key already handled by menu)
1002                         if (code == KeyEvent.VK_BACK_SPACE && currPointIndex >= 0) {
1003                                 _app.deleteCurrentPoint();
1004                         }
1005                 }
1006         }
1007
1008         /**
1009          * @param inE key released event, ignored
1010          */
1011         public void keyReleased(KeyEvent e)
1012         {
1013                 // ignore
1014         }
1015
1016         /**
1017          * @param inE key typed event, ignored
1018          */
1019         public void keyTyped(KeyEvent inE)
1020         {
1021                 // ignore
1022         }
1023
1024         /**
1025          * @param inE mouse wheel event indicating scroll direction
1026          */
1027         public void mouseWheelMoved(MouseWheelEvent inE)
1028         {
1029                 int clicks = inE.getWheelRotation();
1030                 if (clicks < 0)
1031                         zoomIn();
1032                 else if (clicks > 0)
1033                         zoomOut();
1034         }
1035
1036         /**
1037          * @return current map position
1038          */
1039         public MapPosition getMapPosition()
1040         {
1041                 return _mapPosition;
1042         }
1043 }