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

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