tim/prune/function/compress/MarkPointsInRectangleFunction.java

   1 package tim.prune.function.compress;
   2
   3 import tim.prune.App;
   4 import tim.prune.UpdateMessageBroker;
   5 import tim.prune.data.DataPoint;
   6
   7 /**
   8  * Function to mark all the points in the selected rectangle
   9  */
  10 public class MarkPointsInRectangleFunction extends MarkAndDeleteFunction
  11 {
  12         /** Minimum and maximum latitude values of rectangle */
  13         private double _minLat = 0.0, _maxLat = 0.0;
  14         /** Minimum and maximum longitude values of rectangle */
  15         private double _minLon = 0.0, _maxLon = 0.0;
  16
  17
  18         /**
  19          * Constructor
  20          * @param inApp App object
  21          */
  22         public MarkPointsInRectangleFunction(App inApp)
  23         {
  24                 super(inApp);
  25         }
  26
  27         /** @return name key */
  28         public String getNameKey() {
  29                 return "menu.track.markrectangle";
  30         }
  31
  32         /**
  33          * Set the coordinates of the rectangle
  34          * @param inLon1 first longitude value
  35          * @param inLat1 first latitude value
  36          * @param inLon2 second longitude value
  37          * @param inLat2 second latitude value
  38          */
  39         public void setRectCoords(double inLon1, double inLat1, double inLon2, double inLat2)
  40         {
  41                 if (inLon1 == inLon2 || inLat1 == inLat2)
  42                 {
  43                         // Coordinates not valid
  44                         _minLat = _maxLat = _minLon = _maxLon = 0.0;
  45                 }
  46                 else
  47                 {
  48                         if (inLon2 > inLon1) {
  49                                 _minLon = inLon1; _maxLon = inLon2;
  50                         }
  51                         else {
  52                                 _minLon = inLon2; _maxLon = inLon1;
  53                         }
  54                         if (inLat2 > inLat1) {
  55                                 _minLat = inLat1; _maxLat = inLat2;
  56                         }
  57                         else {
  58                                 _minLat = inLat2; _maxLat = inLat1;
  59                         }
  60                 }
  61         }
  62
  63         /**
  64          * Begin the function using the set parameters
  65          */
  66         public void begin()
  67         {
  68                 if (_maxLon == _minLon || _maxLat == _minLat) {
  69                         return;
  70                 }
  71
  72                 // Loop over all points in track
  73                 final int numPoints = _app.getTrackInfo().getTrack().getNumPoints();
  74                 int numMarked = 0;
  75                 for (int i=0; i<numPoints; i++)
  76                 {
  77                         DataPoint point = _app.getTrackInfo().getTrack().getPoint(i);
  78                         // For each point, see if it's within the rectangle
  79                         final double pointLon = point.getLongitude().getDouble();
  80                         final double pointLat = point.getLatitude().getDouble();
  81                         final boolean insideRect = (pointLon >= _minLon && pointLon <= _maxLon
  82                                 && pointLat >= _minLat && pointLat <= _maxLat);
  83                         // Mark it accordingly (also resetting points outside the rect to false)
  84                         point.setMarkedForDeletion(insideRect);
  85                         if (insideRect) {
  86                                 numMarked++;
  87                         }
  88                 }
  89
  90                 // Inform subscribers to update display
  91                 UpdateMessageBroker.informSubscribers();
  92                 // Confirm message showing how many marked
  93                 if (numMarked > 0)
  94                 {
  95                         optionallyDeleteMarkedPoints(numMarked);
  96                 }
  97         }
  98 }