tim/prune/undo/UndoLookupSrtm.java

   1 package tim.prune.undo;
   2
   3 import tim.prune.I18nManager;
   4 import tim.prune.UpdateMessageBroker;
   5 import tim.prune.data.DataPoint;
   6 import tim.prune.data.Field;
   7 import tim.prune.data.Track;
   8 import tim.prune.data.TrackInfo;
   9
  10 /**
  11  * Undo lookup of altitudes from SRTM data
  12  */
  13 public class UndoLookupSrtm implements UndoOperation
  14 {
  15         /** DataPoint objects which didn't have altitudes before */
  16         private DataPoint[] _points;
  17
  18
  19         /**
  20          * Constructor
  21          * @param inTrackInfo track info object
  22          */
  23         public UndoLookupSrtm(TrackInfo inTrackInfo)
  24         {
  25                 Track track = inTrackInfo.getTrack();
  26                 int numPoints = track.getNumPoints();
  27                 // Make array of points without altitudes
  28                 _points = new DataPoint[numPoints];
  29                 for (int i=0; i<numPoints; i++) {
  30                         DataPoint point = track.getPoint(i);
  31                         if (!point.hasAltitude()) {
  32                                 _points[i] = point;
  33                         }
  34                 }
  35         }
  36
  37
  38         /**
  39          * @return description of operation
  40          */
  41         public String getDescription()
  42         {
  43                 return I18nManager.getText("undo.lookupsrtm");
  44         }
  45
  46
  47         /**
  48          * Perform the undo operation on the given Track
  49          * @param inTrackInfo TrackInfo object on which to perform the operation
  50          */
  51         public void performUndo(TrackInfo inTrackInfo) throws UndoException
  52         {
  53                 // Loop through points again, and reset altitudes if they have one
  54                 final int numPoints = _points.length;
  55                 for (int i=0; i<numPoints; i++) {
  56                         DataPoint point = _points[i];
  57                         if (point != null && point.hasAltitude()) {
  58                                 point.setFieldValue(Field.ALTITUDE, null, true);
  59                         }
  60                 }
  61                 _points = null;
  62                 UpdateMessageBroker.informSubscribers();
  63         }
  64 }