tim/prune/gui/profile/AltitudeData.java

   1 package tim.prune.gui.profile;
   2
   3 import tim.prune.I18nManager;
   4 import tim.prune.data.Altitude;
   5 import tim.prune.data.DataPoint;
   6 import tim.prune.data.Track;
   7
   8 /**
   9  * Class to provide a source of altitude data for the profile chart
  10  */
  11 public class AltitudeData extends ProfileData
  12 {
  13         /** Altitude format for values */
  14         private Altitude.Format _altitudeFormat = Altitude.Format.NO_FORMAT;
  15
  16
  17         /**
  18          * Constructor
  19          * @param inTrack track object
  20          */
  21         public AltitudeData(Track inTrack) {
  22                 super(inTrack);
  23         }
  24
  25         /**
  26          * Get the data and populate the instance arrays
  27          */
  28         public void init()
  29         {
  30                 initArrays();
  31                 _hasData = false;
  32                 _altitudeFormat = Altitude.Format.NO_FORMAT;
  33                 if (_track != null) {
  34                         for (int i=0; i<_track.getNumPoints(); i++)
  35                         {
  36                                 DataPoint point = _track.getPoint(i);
  37                                 if (point != null && point.hasAltitude())
  38                                 {
  39                                         // Point has an altitude - if it's the first one, use its format
  40                                         if (_altitudeFormat == Altitude.Format.NO_FORMAT)
  41                                         {
  42                                                 _altitudeFormat = point.getAltitude().getFormat();
  43                                                 _minValue = _maxValue = point.getAltitude().getValue();
  44                                         }
  45                                         // Store the value and maintain max and min values
  46                                         double value = point.getAltitude().getValue(_altitudeFormat);
  47                                         _pointValues[i] = value;
  48                                         if (value < _minValue) {_minValue = value;}
  49                                         if (value > _maxValue) {_maxValue = value;}
  50
  51                                         _hasData = true;
  52                                         _pointHasData[i] = true;
  53                                 }
  54                                 else _pointHasData[i] = false;
  55                         }
  56                 }
  57         }
  58
  59         /**
  60          * @return text description including units
  61          */
  62         public String getLabel()
  63         {
  64                 return I18nManager.getText("fieldname.altitude") + " ("
  65                         + I18nManager.getText(_altitudeFormat==Altitude.Format.FEET?"units.feet.short":"units.metres.short")
  66                         + ")";
  67         }
  68
  69         /**
  70          * @return key for message when no altitudes present
  71          */
  72         public String getNoDataKey() {
  73                 return "display.noaltitudes";
  74         }
  75 }