tim/prune/undo/UndoDeletePoint.java

   1 package tim.prune.undo;\r
   2 \r
   3 import tim.prune.I18nManager;\r
   4 import tim.prune.data.DataPoint;\r
   5 import tim.prune.data.TrackInfo;\r
   6 \r
   7 /**\r
   8  * Operation to undo a delete of a single point\r
   9  */\r
  10 public class UndoDeletePoint implements UndoOperation\r
  11 {\r
  12         private int _pointIndex = -1;\r
  13         private DataPoint _point = null;\r
  14         private int _photoIndex = -1;\r
  15         private boolean _segmentStart = false;\r
  16 \r
  17 \r
  18         /**\r
  19          * Constructor\r
  20          * @param inPointIndex index number of point within track\r
  21          * @param inPoint data point\r
  22          * @param inPhotoIndex index number of photo within photo list\r
  23          * @param inSegmentStart true if following track point starts new segment\r
  24          */\r
  25         public UndoDeletePoint(int inPointIndex, DataPoint inPoint, int inPhotoIndex, boolean inSegmentStart)\r
  26         {\r
  27                 _pointIndex = inPointIndex;\r
  28                 _point = inPoint;\r
  29                 _photoIndex = inPhotoIndex;\r
  30                 _segmentStart = inSegmentStart;\r
  31         }\r
  32 \r
  33 \r
  34         /**\r
  35          * @return description of operation including point name if any\r
  36          */\r
  37         public String getDescription()\r
  38         {\r
  39                 String desc = I18nManager.getText("undo.deletepoint");\r
  40                 String pointName = _point.getWaypointName();\r
  41                 if (pointName != null && !pointName.equals(""))\r
  42                         desc = desc + " " + pointName;\r
  43                 return desc;\r
  44         }\r
  45 \r
  46 \r
  47         /**\r
  48          * Perform the undo operation on the given Track\r
  49          * @param inTrackInfo TrackInfo object on which to perform the operation\r
  50          */\r
  51         public void performUndo(TrackInfo inTrackInfo) throws UndoException\r
  52         {\r
  53                 // restore point into track\r
  54                 if (!inTrackInfo.getTrack().insertPoint(_point, _pointIndex))\r
  55                 {\r
  56                         throw new UndoException(getDescription());\r
  57                 }\r
  58                 // Re-attach / Re-insert photo into list if necessary\r
  59                 if (_point.getPhoto() != null && _photoIndex > -1)\r
  60                 {\r
  61                         // Check if photo is still in list\r
  62                         if (!inTrackInfo.getPhotoList().contains(_point.getPhoto()))\r
  63                         {\r
  64                                 // photo has been removed - need to reinsert\r
  65                                 inTrackInfo.getPhotoList().addPhoto(_point.getPhoto(), _photoIndex);\r
  66                         }\r
  67                         // Ensure that photo is associated with point\r
  68                         if (_point.getPhoto().getDataPoint() != _point) {\r
  69                                 _point.getPhoto().setDataPoint(_point);\r
  70                         }\r
  71                 }\r
  72                 // Restore previous status of following track point if necessary\r
  73                 if (!_segmentStart)\r
  74                 {\r
  75                         // Deletion of point can only set following point to true, so only need to set it back to false\r
  76                         DataPoint nextTrackPoint = inTrackInfo.getTrack().getNextTrackPoint(_pointIndex + 1);\r
  77                         if (nextTrackPoint != null) {\r
  78                                 nextTrackPoint.setSegmentStart(false);\r
  79                         }\r
  80                 }\r
  81         }\r
  82 }\r