]> gitweb.fperrin.net Git - GpsPrune.git/blobdiff - tim/prune/gui/map/MapCanvas.java
Version 11, August 2010
[GpsPrune.git] / tim / prune / gui / map / MapCanvas.java
index a8df86efec37aedd2cfa77074ad23ddd7876e27b..97be7b5024e47124a92b940292052aa09277ec42 100644 (file)
@@ -1,11 +1,13 @@
 package tim.prune.gui.map;
 
+import java.awt.BasicStroke;
 import java.awt.BorderLayout;
 import java.awt.Color;
 import java.awt.Dimension;
 import java.awt.FlowLayout;
 import java.awt.FontMetrics;
 import java.awt.Graphics;
+import java.awt.Graphics2D;
 import java.awt.Image;
 import java.awt.RenderingHints;
 import java.awt.event.ActionEvent;
@@ -37,7 +39,15 @@ import tim.prune.App;
 import tim.prune.DataSubscriber;
 import tim.prune.FunctionLibrary;
 import tim.prune.I18nManager;
+import tim.prune.UpdateMessageBroker;
+import tim.prune.config.ColourScheme;
+import tim.prune.config.Config;
+import tim.prune.data.Checker;
+import tim.prune.data.Coordinate;
+import tim.prune.data.DataPoint;
 import tim.prune.data.DoubleRange;
+import tim.prune.data.Latitude;
+import tim.prune.data.Longitude;
 import tim.prune.data.Selection;
 import tim.prune.data.Track;
 import tim.prune.data.TrackInfo;
@@ -53,16 +63,20 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
        private App _app = null;
        /** Track object */
        private Track _track = null;
+       /** TrackInfo object */
+       private TrackInfo _trackInfo = null;
        /** Selection object */
        private Selection _selection = null;
        /** Previously selected point */
        private int _prevSelectedPoint = -1;
-       /** Tile cacher */
-       private MapTileCacher _tileCacher = new MapTileCacher(this);
+       /** Tile manager */
+       private MapTileManager _tileManager = new MapTileManager(this);
        /** Image to display */
        private BufferedImage _mapImage = null;
        /** Slider for transparency */
        private JSlider _transparencySlider = null;
+       /** Checkbox for scale bar */
+       private JCheckBox _scaleCheckBox = null;
        /** Checkbox for maps */
        private JCheckBox _mapCheckBox = null;
        /** Checkbox for autopan */
@@ -75,6 +89,8 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
        private JPanel _topPanel = null;
        /** Side component panel */
        private JPanel _sidePanel = null;
+       /** Scale bar */
+       private ScaleBar _scaleBar = null;
        /* Data */
        private DoubleRange _latRange = null, _lonRange = null;
        private DoubleRange _xRange = null, _yRange = null;
@@ -108,14 +124,7 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
        private static final int AUTOPAN_DISTANCE = 75;
 
        // Colours
-       private static final Color COLOR_BG         = Color.WHITE;
        private static final Color COLOR_MESSAGES   = Color.GRAY;
-       private static final Color COLOR_POINT      = Color.BLUE;
-       private static final Color COLOR_POINT_DELETED = Color.RED;
-       private static final Color COLOR_CURR_RANGE = Color.GREEN;
-       private static final Color COLOR_CROSSHAIRS = Color.RED;
-       private static final Color COLOR_WAYPT_NAME = Color.BLACK;
-       private static final Color COLOR_PHOTO_PT   = Color.ORANGE;
 
 
        /**
@@ -126,6 +135,7 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
        public MapCanvas(App inApp, TrackInfo inTrackInfo)
        {
                _app = inApp;
+               _trackInfo = inTrackInfo;
                _track = inTrackInfo.getTrack();
                _selection = inTrackInfo.getSelection();
                _mapPosition = new MapPosition();
@@ -146,9 +156,10 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
                ItemListener mapCheckListener = new ItemListener() {
                        public void itemStateChanged(ItemEvent e)
                        {
-                               _tileCacher.clearAll();
+                               _tileManager.clearMemoryCaches();
                                _recalculate = true;
-                               repaint();
+                               Config.setConfigBoolean(Config.KEY_SHOW_MAP, e.getStateChange() == ItemEvent.SELECTED);
+                               UpdateMessageBroker.informSubscribers(); // to let menu know
                        }
                };
                _topPanel = new JPanel();
@@ -169,6 +180,18 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
                });
                _transparencySlider.setFocusable(false); // stop slider from stealing keyboard focus
                _topPanel.add(_transparencySlider);
+               // Add checkbox button for enabling scale bar
+               _scaleCheckBox = new JCheckBox(IconManager.getImageIcon(IconManager.SCALEBAR_BUTTON), true);
+               _scaleCheckBox.setSelectedIcon(IconManager.getImageIcon(IconManager.SCALEBAR_BUTTON_ON));
+               _scaleCheckBox.setOpaque(false);
+               _scaleCheckBox.setToolTipText(I18nManager.getText("menu.map.showscalebar"));
+               _scaleCheckBox.addItemListener(new ItemListener() {
+                       public void itemStateChanged(ItemEvent e) {
+                               _scaleBar.setVisible(_scaleCheckBox.isSelected());
+                       }
+               });
+               _scaleCheckBox.setFocusable(false); // stop button from stealing keyboard focus
+               _topPanel.add(_scaleCheckBox);
                // Add checkbox button for enabling maps or not
                _mapCheckBox = new JCheckBox(IconManager.getImageIcon(IconManager.MAP_BUTTON), false);
                _mapCheckBox.setSelectedIcon(IconManager.getImageIcon(IconManager.MAP_BUTTON_ON));
@@ -223,12 +246,16 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
                zoomOutButton.setFocusable(false); // stop button from stealing keyboard focus
                _sidePanel.add(zoomOutButton);
 
+               // Bottom panel for scale bar
+               _scaleBar = new ScaleBar();
+
                // add control panels to this one
                setLayout(new BorderLayout());
                _topPanel.setVisible(false);
                _sidePanel.setVisible(false);
                add(_topPanel, BorderLayout.NORTH);
                add(_sidePanel, BorderLayout.WEST);
+               add(_scaleBar, BorderLayout.SOUTH);
                // Make popup menu
                makePopup();
        }
@@ -281,8 +308,10 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
                newPointItem.addActionListener(new ActionListener() {
                        public void actionPerformed(ActionEvent e)
                        {
-                               _app.createPoint(MapUtils.getLatitudeFromY(_mapPosition.getYFromPixels(_popupMenuY, getHeight())),
-                                       MapUtils.getLongitudeFromX(_mapPosition.getXFromPixels(_popupMenuX, getWidth())));
+                               double lat = MapUtils.getLatitudeFromY(_mapPosition.getYFromPixels(_popupMenuY, getHeight()));
+                               double lon = MapUtils.getLongitudeFromX(_mapPosition.getXFromPixels(_popupMenuX, getWidth()));
+                               _app.createPoint(new DataPoint(new Latitude(lat, Coordinate.FORMAT_NONE),
+                                       new Longitude(lon, Coordinate.FORMAT_NONE), null));
                        }});
                newPointItem.setEnabled(true);
                _popup.add(newPointItem);
@@ -346,9 +375,11 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
                                _prevSelectedPoint = selectedPoint;
                        }
 
-                       // Draw the mapImage if necessary
-                       if ((_mapImage == null || _recalculate)) {
-                               getMapTiles();
+                       // Draw the map contents if necessary
+                       if ((_mapImage == null || _recalculate))
+                       {
+                               paintMapContents();
+                               _scaleBar.updateScale(_mapPosition.getZoom(), _mapPosition.getYFromPixels(0, 0));
                        }
                        // Draw the prepared image onto the panel
                        if (_mapImage != null) {
@@ -366,10 +397,11 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
                }
                else
                {
-                       inG.setColor(COLOR_BG);
+                       inG.setColor(Config.getColourScheme().getColour(ColourScheme.IDX_BACKGROUND));
                        inG.fillRect(0, 0, getWidth(), getHeight());
                        inG.setColor(COLOR_MESSAGES);
                        inG.drawString(I18nManager.getText("display.nodata"), 50, getHeight()/2);
+                       _scaleBar.updateScale(-1, 0);
                }
                // Draw slider etc on top
                paintChildren(inG);
@@ -377,9 +409,9 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
 
 
        /**
-        * Get the map tiles for the current zoom level and given tile parameters
+        * Paint the map tiles and the points on to the _mapImage
         */
-       private void getMapTiles()
+       private void paintMapContents()
        {
                if (_mapImage == null || _mapImage.getWidth() != getWidth() || _mapImage.getHeight() != getHeight())
                {
@@ -388,22 +420,27 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
 
                // Clear map
                Graphics g = _mapImage.getGraphics();
-               // Clear to white
-               g.setColor(COLOR_BG);
+               // Clear to background
+               g.setColor(Config.getColourScheme().getColour(ColourScheme.IDX_BACKGROUND));
                g.fillRect(0, 0, getWidth(), getHeight());
 
+               // Check whether maps are on or not
+               boolean showMap = Config.getConfigBoolean(Config.KEY_SHOW_MAP);
+               _mapCheckBox.setSelected(showMap);
+
                // reset error message
-               if (!_mapCheckBox.isSelected()) {_shownOsmErrorAlready = false;}
+               if (!showMap) {_shownOsmErrorAlready = false;}
+               _recalculate = false;
                // Only get map tiles if selected
-               if (_mapCheckBox.isSelected())
+               if (showMap)
                {
                        // init tile cacher
-                       _tileCacher.centreMap(_mapPosition.getZoom(), _mapPosition.getCentreTileX(), _mapPosition.getCentreTileY());
+                       _tileManager.centreMap(_mapPosition.getZoom(), _mapPosition.getCentreTileX(), _mapPosition.getCentreTileY());
 
                        boolean loadingFailed = false;
                        if (_mapImage == null) return;
 
-                       if (_tileCacher.isOverzoomed())
+                       if (_tileManager.isOverzoomed())
                        {
                                // display overzoom message
                                g.setColor(COLOR_MESSAGES);
@@ -411,6 +448,7 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
                        }
                        else
                        {
+                               int numLayers = _tileManager.getNumLayers();
                                // Loop over tiles drawing each one
                                int[] tileIndices = _mapPosition.getTileIndices(getWidth(), getHeight());
                                int[] pixelOffsets = _mapPosition.getDisplayOffsets(getWidth(), getHeight());
@@ -420,17 +458,22 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
                                        for (int tileY = tileIndices[2]; tileY <= tileIndices[3]; tileY++)
                                        {
                                                int y = (tileY - tileIndices[2]) * 256 - pixelOffsets[1];
-                                               Image image = _tileCacher.getTile(tileX, tileY);
-                                               if (image != null) {
-                                                       g.drawImage(image, x, y, 256, 256, null);
+                                               // Loop over layers
+                                               for (int l=0; l<numLayers; l++)
+                                               {
+                                                       Image image = _tileManager.getTile(l, tileX, tileY);
+                                                       if (image != null) {
+                                                               g.drawImage(image, x, y, 256, 256, null);
+                                                       }
                                                }
                                        }
                                }
 
                                // Make maps brighter / fainter
-                               float[] scaleFactors = {1.0f, 1.05f, 1.1f, 1.2f, 1.6f, 2.0f};
-                               float scaleFactor = scaleFactors[_transparencySlider.getValue()];
-                               if (scaleFactor > 1.0f) {
+                               final float[] scaleFactors = {1.0f, 1.05f, 1.1f, 1.2f, 1.6f, 2.2f};
+                               final float scaleFactor = scaleFactors[_transparencySlider.getValue()];
+                               if (scaleFactor > 1.0f)
+                               {
                                        RenderingHints hints = new RenderingHints(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_OFF);
                                        hints.put(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
                                        RescaleOp op = new RescaleOp(scaleFactor, 0, hints);
@@ -451,7 +494,6 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
                // free g
                g.dispose();
 
-               _recalculate = false;
                // Zoom to fit if no points found
                if (pointsPainted <= 0 && _checkBounds) {
                        zoomToFit();
@@ -460,7 +502,7 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
                }
                _checkBounds = false;
                // enable / disable transparency slider
-               _transparencySlider.setEnabled(_mapCheckBox.isSelected());
+               _transparencySlider.setEnabled(showMap);
        }
 
 
@@ -471,33 +513,48 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
         */
        private int paintPoints(Graphics inG)
        {
+               // Set up colours
+               final Color pointColour = Config.getColourScheme().getColour(ColourScheme.IDX_POINT);
+               final Color rangeColour = Config.getColourScheme().getColour(ColourScheme.IDX_SELECTION);
+               final Color currentColour = Config.getColourScheme().getColour(ColourScheme.IDX_PRIMARY);
+               final Color secondColour = Config.getColourScheme().getColour(ColourScheme.IDX_SECONDARY);
+               final Color textColour = Config.getColourScheme().getColour(ColourScheme.IDX_TEXT);
+
+               // try to set double line width for painting
+               if (inG instanceof Graphics2D) {
+                       ((Graphics2D) inG).setStroke(new BasicStroke(2.0f));
+               }
                int pointsPainted = 0;
                // draw track points
-               inG.setColor(COLOR_POINT);
+               inG.setColor(pointColour);
                int prevX = -1, prevY = -1;
                boolean connectPoints = _connectCheckBox.isSelected();
                boolean prevPointVisible = false, currPointVisible = false;
+               boolean anyWaypoints = false;
+               boolean isWaypoint = false;
                for (int i=0; i<_track.getNumPoints(); i++)
                {
                        int px = getWidth() / 2 + _mapPosition.getXFromCentre(_track.getX(i));
                        int py = getHeight() / 2 + _mapPosition.getYFromCentre(_track.getY(i));
                        currPointVisible = px >= 0 && px < getWidth() && py >= 0 && py < getHeight();
+                       isWaypoint = _track.getPoint(i).isWaypoint();
+                       anyWaypoints = anyWaypoints || isWaypoint;
                        if (currPointVisible)
                        {
-                               if (!_track.getPoint(i).isWaypoint())
+                               if (!isWaypoint)
                                {
                                        // Draw rectangle for track point
                                        if (_track.getPoint(i).getDeleteFlag()) {
-                                               inG.setColor(COLOR_POINT_DELETED);
+                                               inG.setColor(currentColour);
                                        }
                                        else {
-                                               inG.setColor(COLOR_POINT);
+                                               inG.setColor(pointColour);
                                        }
                                        inG.drawRect(px-2, py-2, 3, 3);
                                        pointsPainted++;
                                }
                        }
-                       if (!_track.getPoint(i).isWaypoint())
+                       if (!isWaypoint)
                        {
                                // Connect track points if either of them are visible
                                if (connectPoints && (currPointVisible || prevPointVisible)
@@ -512,56 +569,58 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
                }
 
                // Loop over points, just drawing blobs for waypoints
-               inG.setColor(COLOR_WAYPT_NAME);
+               inG.setColor(textColour);
                FontMetrics fm = inG.getFontMetrics();
                int nameHeight = fm.getHeight();
                int width = getWidth();
                int height = getHeight();
-               for (int i=0; i<_track.getNumPoints(); i++)
-               {
-                       if (_track.getPoint(i).isWaypoint())
+               if (anyWaypoints) {
+                       for (int i=0; i<_track.getNumPoints(); i++)
                        {
-                               int px = getWidth() / 2 + _mapPosition.getXFromCentre(_track.getX(i));
-                               int py = getHeight() / 2 + _mapPosition.getYFromCentre(_track.getY(i));
-                               if (px >= 0 && px < getWidth() && py >= 0 && py < getHeight())
+                               if (_track.getPoint(i).isWaypoint())
                                {
-                                       inG.fillRect(px-3, py-3, 6, 6);
-                                       pointsPainted++;
+                                       int px = getWidth() / 2 + _mapPosition.getXFromCentre(_track.getX(i));
+                                       int py = getHeight() / 2 + _mapPosition.getYFromCentre(_track.getY(i));
+                                       if (px >= 0 && px < getWidth() && py >= 0 && py < getHeight())
+                                       {
+                                               inG.fillRect(px-3, py-3, 6, 6);
+                                               pointsPainted++;
+                                       }
                                }
                        }
-               }
-               // Loop over points again, now draw names for waypoints
-               for (int i=0; i<_track.getNumPoints(); i++)
-               {
-                       if (_track.getPoint(i).isWaypoint())
+                       // Loop over points again, now draw names for waypoints
+                       for (int i=0; i<_track.getNumPoints(); i++)
                        {
-                               int px = getWidth() / 2 + _mapPosition.getXFromCentre(_track.getX(i));
-                               int py = getHeight() / 2 + _mapPosition.getYFromCentre(_track.getY(i));
-                               if (px >= 0 && px < getWidth() && py >= 0 && py < getHeight())
+                               if (_track.getPoint(i).isWaypoint())
                                {
-                                       // Figure out where to draw waypoint name so it doesn't obscure track
-                                       String waypointName = _track.getPoint(i).getWaypointName();
-                                       int nameWidth = fm.stringWidth(waypointName);
-                                       boolean drawnName = false;
-                                       // Make arrays for coordinates right left up down
-                                       int[] nameXs = {px + 2, px - nameWidth - 2, px - nameWidth/2, px - nameWidth/2};
-                                       int[] nameYs = {py + (nameHeight/2), py + (nameHeight/2), py - 2, py + nameHeight + 2};
-                                       for (int extraSpace = 4; extraSpace < 13 && !drawnName; extraSpace+=2)
+                                       int px = getWidth() / 2 + _mapPosition.getXFromCentre(_track.getX(i));
+                                       int py = getHeight() / 2 + _mapPosition.getYFromCentre(_track.getY(i));
+                                       if (px >= 0 && px < getWidth() && py >= 0 && py < getHeight())
                                        {
-                                               // Shift arrays for coordinates right left up down
-                                               nameXs[0] += 2; nameXs[1] -= 2;
-                                               nameYs[2] -= 2; nameYs[3] += 2;
-                                               // Check each direction in turn right left up down
-                                               for (int a=0; a<4; a++)
+                                               // Figure out where to draw waypoint name so it doesn't obscure track
+                                               String waypointName = _track.getPoint(i).getWaypointName();
+                                               int nameWidth = fm.stringWidth(waypointName);
+                                               boolean drawnName = false;
+                                               // Make arrays for coordinates right left up down
+                                               int[] nameXs = {px + 2, px - nameWidth - 2, px - nameWidth/2, px - nameWidth/2};
+                                               int[] nameYs = {py + (nameHeight/2), py + (nameHeight/2), py - 2, py + nameHeight + 2};
+                                               for (int extraSpace = 4; extraSpace < 13 && !drawnName; extraSpace+=2)
                                                {
-                                                       if (nameXs[a] > 0 && (nameXs[a] + nameWidth) < width
-                                                               && nameYs[a] < height && (nameYs[a] - nameHeight) > 0
-                                                               && !overlapsPoints(nameXs[a], nameYs[a], nameWidth, nameHeight))
+                                                       // Shift arrays for coordinates right left up down
+                                                       nameXs[0] += 2; nameXs[1] -= 2;
+                                                       nameYs[2] -= 2; nameYs[3] += 2;
+                                                       // Check each direction in turn right left up down
+                                                       for (int a=0; a<4; a++)
                                                        {
-                                                               // Found a rectangle to fit - draw name here and quit
-                                                               inG.drawString(waypointName, nameXs[a], nameYs[a]);
-                                                               drawnName = true;
-                                                               break;
+                                                               if (nameXs[a] > 0 && (nameXs[a] + nameWidth) < width
+                                                                       && nameYs[a] < height && (nameYs[a] - nameHeight) > 0
+                                                                       && !overlapsPoints(nameXs[a], nameYs[a], nameWidth, nameHeight, textColour))
+                                                               {
+                                                                       // Found a rectangle to fit - draw name here and quit
+                                                                       inG.drawString(waypointName, nameXs[a], nameYs[a]);
+                                                                       drawnName = true;
+                                                                       break;
+                                                               }
                                                        }
                                                }
                                        }
@@ -569,7 +628,7 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
                        }
                }
                // Loop over points, drawing blobs for photo points
-               inG.setColor(COLOR_PHOTO_PT);
+               inG.setColor(secondColour);
                for (int i=0; i<_track.getNumPoints(); i++)
                {
                        if (_track.getPoint(i).getPhoto() != null)
@@ -588,7 +647,7 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
                // Draw selected range
                if (_selection.hasRangeSelected())
                {
-                       inG.setColor(COLOR_CURR_RANGE);
+                       inG.setColor(rangeColour);
                        for (int i=_selection.getStart(); i<=_selection.getEnd(); i++)
                        {
                                int px = getWidth() / 2 + _mapPosition.getXFromCentre(_track.getX(i));
@@ -603,7 +662,7 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
                {
                        int px = getWidth() / 2 + _mapPosition.getXFromCentre(_track.getX(selectedPoint));
                        int py = getHeight() / 2 + _mapPosition.getYFromCentre(_track.getY(selectedPoint));
-                       inG.setColor(COLOR_CROSSHAIRS);
+                       inG.setColor(currentColour);
                        // crosshairs
                        inG.drawLine(px, 0, px, getHeight());
                        inG.drawLine(0, py, getWidth(), py);
@@ -622,12 +681,17 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
         * @param inY bottom Y coordinate
         * @param inWidth width of rectangle
         * @param inHeight height of rectangle
-        * @return true if there's at least one data point in the rectangle
+        * @param inTextColour colour of text
+        * @return true if the rectangle overlaps stuff too close to the given colour
         */
-       private boolean overlapsPoints(int inX, int inY, int inWidth, int inHeight)
+       private boolean overlapsPoints(int inX, int inY, int inWidth, int inHeight, Color inTextColour)
        {
-               // each of the colour channels must be brighter than this to count as empty
-               final int BRIGHTNESS_LIMIT = 210;
+               // each of the colour channels must be further away than this to count as empty
+               final int BRIGHTNESS_LIMIT = 80;
+               final int textRGB = inTextColour.getRGB();
+               final int textLow = textRGB & 255;
+               final int textMid = (textRGB >> 8) & 255;
+               final int textHigh = (textRGB >> 16) & 255;
                try
                {
                        // loop over x coordinate of rectangle
@@ -638,11 +702,14 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
                                {
                                        int pixelColor = _mapImage.getRGB(inX + x, inY - y);
                                        // split into four components rgba
-                                       int lowestBit = pixelColor & 255;
-                                       int secondBit = (pixelColor >> 8) & 255;
-                                       int thirdBit = (pixelColor >> 16) & 255;
+                                       int pixLow = pixelColor & 255;
+                                       int pixMid = (pixelColor >> 8) & 255;
+                                       int pixHigh = (pixelColor >> 16) & 255;
                                        //int fourthBit = (pixelColor >> 24) & 255; // alpha ignored
-                                       if (lowestBit < BRIGHTNESS_LIMIT || secondBit < BRIGHTNESS_LIMIT || thirdBit < BRIGHTNESS_LIMIT) return true;
+                                       // If colours are too close in any channel then it's an overlap
+                                       if (Math.abs(pixLow-textLow) < BRIGHTNESS_LIMIT ||
+                                               Math.abs(pixMid-textMid) < BRIGHTNESS_LIMIT ||
+                                               Math.abs(pixHigh-textHigh) < BRIGHTNESS_LIMIT) {return true;}
                                }
                        }
                }
@@ -736,11 +803,26 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
                         // select point if it's a left-click
                        if (!inE.isMetaDown())
                        {
-                               int pointIndex = _track.getNearestPointIndex(
-                                        _mapPosition.getXFromPixels(inE.getX(), getWidth()),
-                                        _mapPosition.getYFromPixels(inE.getY(), getHeight()),
-                                        _mapPosition.getBoundsFromPixels(CLICK_SENSITIVITY), false);
-                               _selection.selectPoint(pointIndex);
+                               if (inE.getClickCount() == 1)
+                               {
+                                       // single click
+                                       int pointIndex = _track.getNearestPointIndex(
+                                                _mapPosition.getXFromPixels(inE.getX(), getWidth()),
+                                                _mapPosition.getYFromPixels(inE.getY(), getHeight()),
+                                                _mapPosition.getBoundsFromPixels(CLICK_SENSITIVITY), false);
+                                       // Extend selection for shift-click
+                                       if (inE.isShiftDown()) {
+                                               _trackInfo.extendSelection(pointIndex);
+                                       }
+                                       else {
+                                               _trackInfo.selectPoint(pointIndex);
+                                       }
+                               }
+                               else if (inE.getClickCount() == 2) {
+                                       // double click
+                                       panMap(inE.getX() - getWidth()/2, inE.getY() - getHeight()/2);
+                                       zoomIn();
+                               }
                        }
                        else
                        {
@@ -858,7 +940,7 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
                        _checkBounds = true;
                }
                if ((inUpdateType & DataSubscriber.MAPSERVER_CHANGED) > 0) {
-                       _tileCacher.setTileConfig(new MapTileConfig());
+                       _tileManager.resetConfig();
                }
                repaint();
                // enable or disable components
@@ -876,8 +958,9 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
        public void keyPressed(KeyEvent inE)
        {
                int code = inE.getKeyCode();
-               // Check for meta key
-               if (inE.isControlDown())
+               int currPointIndex = _selection.getCurrentPointIndex();
+               // Check for Ctrl key (for Linux/Win) or meta key (Clover key for Mac)
+               if (inE.isControlDown() || inE.isMetaDown())
                {
                        // Check for arrow keys to zoom in and out
                        if (code == KeyEvent.VK_UP)
@@ -885,10 +968,21 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
                        else if (code == KeyEvent.VK_DOWN)
                                zoomOut();
                        // Key nav for next/prev point
-                       else if (code == KeyEvent.VK_LEFT)
-                               _selection.selectPreviousPoint();
+                       else if (code == KeyEvent.VK_LEFT && currPointIndex > 0)
+                               _trackInfo.selectPoint(currPointIndex-1);
                        else if (code == KeyEvent.VK_RIGHT)
-                               _selection.selectNextPoint();
+                               _trackInfo.selectPoint(currPointIndex+1);
+                       else if (code == KeyEvent.VK_PAGE_UP)
+                               _trackInfo.selectPoint(Checker.getPreviousSegmentStart(
+                                       _trackInfo.getTrack(), _trackInfo.getSelection().getCurrentPointIndex()));
+                       else if (code == KeyEvent.VK_PAGE_DOWN)
+                               _trackInfo.selectPoint(Checker.getNextSegmentStart(
+                                       _trackInfo.getTrack(), _trackInfo.getSelection().getCurrentPointIndex()));
+                       // Check for home and end
+                       else if (code == KeyEvent.VK_HOME)
+                               _trackInfo.selectPoint(0);
+                       else if (code == KeyEvent.VK_END)
+                               _trackInfo.selectPoint(_trackInfo.getTrack().getNumPoints()-1);
                }
                else
                {
@@ -904,9 +998,8 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
                        else if (code == KeyEvent.VK_LEFT)
                                rightwardsPan = -PAN_DISTANCE;
                        panMap(rightwardsPan, upwardsPan);
-                       // Check for delete key to delete current point
-                       if (code == KeyEvent.VK_DELETE && _selection.getCurrentPointIndex() >= 0)
-                       {
+                       // Check for backspace key to delete current point (delete key already handled by menu)
+                       if (code == KeyEvent.VK_BACK_SPACE && currPointIndex >= 0) {
                                _app.deleteCurrentPoint();
                        }
                }
@@ -939,4 +1032,12 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
                else if (clicks > 0)
                        zoomOut();
        }
+
+       /**
+        * @return current map position
+        */
+       public MapPosition getMapPosition()
+       {
+               return _mapPosition;
+       }
 }