src/tim/prune/undo/UndoMergeTrackSegments.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.Track;
   7 import tim.prune.data.TrackInfo;
   8
   9 /**
  10  * Undo merging of track segments
  11  */
  12 public class UndoMergeTrackSegments implements UndoOperation
  13 {
  14         /** Start index */
  15         private int _startIndex;
  16         /** array of segment flags */
  17         private boolean[] _segmentFlags = null;
  18         /** Following point, if any */
  19         private DataPoint _nextTrackPoint = null;
  20         /** Segment flag of next point */
  21         private boolean _nextSegmentFlag = false;
  22
  23
  24         /**
  25          * Constructor
  26          * @param inTrack track object for copying segment flags
  27          * @param inStart start index of section
  28          * @param inEnd end index of section
  29          */
  30         public UndoMergeTrackSegments(Track inTrack, int inStart, int inEnd)
  31         {
  32                 _startIndex = inStart;
  33                 // Store booleans for all points within selection
  34                 int numPoints = inEnd - inStart + 1;
  35                 _segmentFlags = new boolean[numPoints];
  36                 for (int i=inStart; i<=inEnd; i++) {
  37                         _segmentFlags[i-inStart] = inTrack.getPoint(i).getSegmentStart();
  38                 }
  39                 // Look for following track point, store flag
  40                 _nextTrackPoint = inTrack.getNextTrackPoint(inEnd + 1);
  41                 if (_nextTrackPoint != null) {
  42                         _nextSegmentFlag = _nextTrackPoint.getSegmentStart();
  43                 }
  44         }
  45
  46
  47         /**
  48          * @return description of operation
  49          */
  50         public String getDescription()
  51         {
  52                 return I18nManager.getText("undo.mergetracksegments");
  53         }
  54
  55
  56         /**
  57          * Perform the undo operation on the given Track
  58          * @param inTrackInfo TrackInfo object on which to perform the operation
  59          */
  60         public void performUndo(TrackInfo inTrackInfo) throws UndoException
  61         {
  62                 // Loop through points replacing segment start flags
  63                 for (int i=0; i<_segmentFlags.length; i++) {
  64                         DataPoint point = inTrackInfo.getTrack().getPoint(_startIndex + i);
  65                         if (!point.isWaypoint()) {
  66                                 point.setSegmentStart(_segmentFlags[i]);
  67                         }
  68                 }
  69                 // Restore segment start flag for following point
  70                 if (_nextTrackPoint != null) {
  71                         _nextTrackPoint.setSegmentStart(_nextSegmentFlag);
  72                 }
  73                 UpdateMessageBroker.informSubscribers();
  74         }
  75 }