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                 {
  35                         for (int i=0; i<_track.getNumPoints(); i++)
  36                         {
  37                                 try
  38                                 {
  39                                         DataPoint point = _track.getPoint(i);
  40                                         if (point != null && point.hasAltitude())
  41                                         {
  42                                                 // Point has an altitude - if it's the first one, use its format
  43                                                 if (_altitudeFormat == Altitude.Format.NO_FORMAT)
  44                                                 {
  45                                                         _altitudeFormat = point.getAltitude().getFormat();
  46                                                         _minValue = _maxValue = point.getAltitude().getValue();
  47                                                 }
  48                                                 // Store the value and maintain max and min values
  49                                                 double value = point.getAltitude().getValue(_altitudeFormat);
  50                                                 _pointValues[i] = value;
  51                                                 if (value < _minValue) {_minValue = value;}
  52                                                 if (value > _maxValue) {_maxValue = value;}
  53
  54                                                 _hasData = true;
  55                                                 _pointHasData[i] = true;
  56                                         }
  57                                         else _pointHasData[i] = false;
  58                                 }
  59                                 catch (ArrayIndexOutOfBoundsException obe)
  60                                 {} // must be due to the track size changing during calculation
  61                                    // assume that a redraw will be triggered
  62                         }
  63                 }
  64         }
  65
  66         /**
  67          * @return text description including units
  68          */
  69         public String getLabel()
  70         {
  71                 return I18nManager.getText("fieldname.altitude") + " ("
  72                         + I18nManager.getText(_altitudeFormat==Altitude.Format.FEET?"units.feet.short":"units.metres.short")
  73                         + ")";
  74         }
  75
  76         /**
  77          * @return key for message when no altitudes present
  78          */
  79         public String getNoDataKey() {
  80                 return "display.noaltitudes";
  81         }
  82 }