Version 20.1, December 2020

[GpsPrune.git] / src / tim / prune / gui / map / MapCanvas.java

diff --git a/src/tim/prune/gui/map/MapCanvas.java b/src/tim/prune/gui/map/MapCanvas.java
index d305d1c4f7bd3b9dae59066bf4f32423b9426c39..a469e99d014c4254d3c5529402589baa58ab05df 100644 (file)
--- a/src/tim/prune/gui/map/MapCanvas.java
+++ b/src/tim/prune/gui/map/MapCanvas.java
@@ -85,7 +85,7 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
        /** coordinates of popup menu */
        private int _popupMenuX = -1, _popupMenuY = -1;
        /** Flag to prevent showing too often the error message about loading maps */
-       private boolean _shownOsmErrorAlready = false;
+       private boolean _shownMapLoadErrorAlready = false;
        /** Current drawing mode */
        private int _drawMode = MODE_DEFAULT;
        /** Current waypoint icon definition */
@@ -339,8 +339,16 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
         */
        private void zoomToFit()
        {
-               _latRange = _track.getLatRange();
-               _lonRange = _track.getLonRange();
+               if (_track.getNumPoints() > 0)
+               {
+                       _latRange = _track.getLatRange();
+                       _lonRange = _track.getLonRange();
+               }
+               if (_latRange == null || _lonRange == null
+                       || !_latRange.hasData() || !_lonRange.hasData())
+               {
+                       setDefaultLatLonRange();
+               }
                _xRange = new DoubleRange(MapUtils.getXFromLongitude(_lonRange.getMinimum()),
                        MapUtils.getXFromLongitude(_lonRange.getMaximum()));
                _yRange = new DoubleRange(MapUtils.getYFromLatitude(_latRange.getMinimum()),
@@ -349,6 +357,37 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
                        getWidth(), getHeight());
        }
 
+       /**
+        * Track data is empty, so find a default area on the map to show
+        */
+       private void setDefaultLatLonRange()
+       {
+               String storedRange = Config.getConfigString(Config.KEY_LATLON_RANGE);
+               // Parse it into four latlon values
+               try
+               {
+                       String[] values = storedRange.split(";");
+                       if (values.length == 4)
+                       {
+                               final double lat1 = Double.valueOf(values[0]);
+                               final double lat2 = Double.valueOf(values[1]);
+                               if (lat1 >= -90.0 && lat1 <= 90.0 && lat2 >= -90.0 && lat2 <= 90.0 && lat1 != lat2)
+                               {
+                                       _latRange = new DoubleRange(lat1, lat2);
+                                       final double lon1 = Double.valueOf(values[2]);
+                                       final double lon2 = Double.valueOf(values[3]);
+                                       if (lon1 >= -180.0 && lon1 <= 180.0 && lon2 >= -180.0 && lon2 <= 180.0 && lon1 != lon2)
+                                       {
+                                               _lonRange = new DoubleRange(lon1, lon2);
+                                               return;
+                                       }
+                               }
+                       }
+               }
+               catch (Exception e) {}
+               _latRange = new DoubleRange(45.8, 47.9);
+               _lonRange = new DoubleRange(5.9, 10.6);
+       }
 
        /**
         * Paint method
@@ -360,7 +399,9 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
                if (_mapImage != null && (_mapImage.getWidth() != getWidth() || _mapImage.getHeight() != getHeight())) {
                        _mapImage = null;
                }
-               if (_track.getNumPoints() > 0)
+               final boolean showMap = Config.getConfigBoolean(Config.KEY_SHOW_MAP);
+               final boolean showSomething = _track.getNumPoints() > 0 || showMap;
+               if (showSomething)
                {
                        // Check for autopan if enabled / necessary
                        if (_autopanCheckBox.isSelected())
@@ -373,6 +414,14 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
                                _prevSelectedPoint = selectedPoint;
                        }
 
+                       // Recognise empty map position, if no data has been loaded
+                       if (_mapPosition.isEmpty())
+                       {
+                               // Set to some default area
+                               zoomToFit();
+                               _recalculate = true;
+                       }
+
                        // Draw the map contents if necessary
                        if (_mapImage == null || _recalculate)
                        {
@@ -425,6 +474,9 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
                        inG.drawString(I18nManager.getText("display.nodata"), 50, getHeight()/2);
                        _scaleBar.updateScale(-1, 0);
                }
+               // enable or disable panels
+               _topPanel.setVisible(showSomething);
+               _sidePanel.setVisible(showSomething);
                // Draw slider etc on top
                paintChildren(inG);
        }
@@ -503,7 +555,7 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
                }
 
                // reset error message
-               if (!showMap) {_shownOsmErrorAlready = false;}
+               if (!showMap) {_shownMapLoadErrorAlready = false;}
                _recalculate = false;
                // Only get map tiles if selected
                if (showMap)
@@ -941,9 +993,9 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
                synchronized(this)
                {
                        // Show message if loading failed (but not too many times)
-                       if (!inIsOk && !_shownOsmErrorAlready && _mapCheckBox.isSelected())
+                       if (!inIsOk && !_shownMapLoadErrorAlready && _mapCheckBox.isSelected())
                        {
-                               _shownOsmErrorAlready = true;
+                               _shownMapLoadErrorAlready = true;
                                // use separate thread to show message about failing to load osm images
                                new Thread(new Runnable() {
                                        public void run() {
@@ -957,6 +1009,15 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
                }
        }
 
+       /**
+        * Inform that a cache failure occurred
+        */
+       public void reportCacheFailure()
+       {
+               // Cache can't be used, so disable it - user will be reminded to set it up by the tips
+               Config.setConfigString(Config.KEY_DISK_CACHE, null);
+       }
+
        /**
         * Zoom out, if not already at minimum zoom
         */
@@ -1074,15 +1135,17 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
         */
        public void mouseClicked(MouseEvent inE)
        {
-               if (_track != null && _track.getNumPoints() > 0)
+               final boolean showMap = Config.getConfigBoolean(Config.KEY_SHOW_MAP);
+               final boolean hasPoints = _track != null && _track.getNumPoints() > 0;
+               if (showMap || hasPoints)
                {
                        // select point if it's a left-click
                        if (!inE.isMetaDown())
                        {
                                if (inE.getClickCount() == 1)
                                {
-                                       // single click
-                                       if (_drawMode == MODE_DEFAULT)
+                                       // single left click
+                                       if (_drawMode == MODE_DEFAULT && hasPoints)
                                        {
                                                int pointIndex = _clickedPoint;
                                                if (pointIndex == INDEX_UNKNOWN)
@@ -1408,10 +1471,6 @@ public class MapCanvas extends JPanel implements MouseListener, MouseMotionListe
                        }
                }
                repaint();
-               // enable or disable components
-               boolean hasData = _track.getNumPoints() > 0;
-               _topPanel.setVisible(hasData);
-               _sidePanel.setVisible(hasData);
                // grab focus for the key presses
                this.requestFocus();
        }