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