src/tim/prune/gui/profile/AltitudeData.java

   1 package tim.prune.gui.profile;
   2
   3 import tim.prune.I18nManager;
   4 import tim.prune.data.DataPoint;
   5 import tim.prune.data.Track;
   6 import tim.prune.data.UnitSet;
   7
   8 /**
   9  * Class to provide a source of altitude data for the profile chart
  10  */
  11 public class AltitudeData extends ProfileData
  12 {
  13         /**
  14          * Constructor
  15          * @param inTrack track object
  16          */
  17         public AltitudeData(Track inTrack) {
  18                 super(inTrack);
  19         }
  20
  21         /**
  22          * Get the data and populate the instance arrays
  23          */
  24         public void init(UnitSet inUnitSet)
  25         {
  26                 setUnitSet(inUnitSet);
  27                 initArrays();
  28                 _hasData = false;
  29                 // multiplication factor for unit conversion
  30                 final double multFactor = _unitSet.getAltitudeUnit().getMultFactorFromStd();
  31                 if (_track != null)
  32                 {
  33                         try
  34                         {
  35                                 for (int i=0; i<_track.getNumPoints(); i++)
  36                                 {
  37                                         DataPoint point = _track.getPoint(i);
  38                                         if (point != null && point.hasAltitude())
  39                                         {
  40                                                 // Point has an altitude - store value and maintain max and min values
  41                                                 double value = point.getAltitude().getMetricValue() * multFactor;
  42                                                 _pointValues[i] = value;
  43                                                 if (value < _minValue || !_hasData) {_minValue = value;}
  44                                                 if (value > _maxValue || !_hasData) {_maxValue = value;}
  45
  46                                                 // if all values are zero then that's no data
  47                                                 _hasData = _hasData || (point.getAltitude().getValue() != 0);
  48                                                 _pointHasData[i] = true;
  49                                         }
  50                                         else _pointHasData[i] = false;
  51                                 }
  52                         }
  53                         catch (ArrayIndexOutOfBoundsException obe)
  54                         {} // must be due to the track size changing during calculation
  55                            // assume that a redraw will be triggered
  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(_unitSet.getAltitudeUnit().getShortnameKey())
  66                         + ")";
  67         }
  68
  69         /**
  70          * @return key for message when no altitudes present
  71          */
  72         public String getNoDataKey() {
  73                 return "display.noaltitudes";
  74         }
  75 }