tim/prune/undo/UndoDeletePhoto.java

   1 package tim.prune.undo;\r
   2 \r
   3 import tim.prune.I18nManager;\r
   4 import tim.prune.UpdateMessageBroker;\r
   5 import tim.prune.data.DataPoint;\r
   6 import tim.prune.data.Photo;\r
   7 import tim.prune.data.TrackInfo;\r
   8 \r
   9 /**\r
  10  * Operation to undo a delete of a single photo, either with or without point\r
  11  */\r
  12 public class UndoDeletePhoto implements UndoOperation\r
  13 {\r
  14         private int _photoIndex = -1;\r
  15         private Photo _photo = null;\r
  16         private int _pointIndex = -1;\r
  17         private DataPoint _point = null;\r
  18 \r
  19 \r
  20         /**\r
  21          * Constructor\r
  22          * @param inPhoto photo\r
  23          * @param inPhotoIndex index number of photo within photo list\r
  24          * @param inPoint data point\r
  25          * @param inPointIndex index number of point within track\r
  26          */\r
  27         public UndoDeletePhoto(Photo inPhoto, int inPhotoIndex, DataPoint inPoint, int inPointIndex)\r
  28         {\r
  29                 _photo = inPhoto;\r
  30                 _photoIndex = inPhotoIndex;\r
  31                 _point = inPoint;\r
  32                 _pointIndex = inPointIndex;\r
  33         }\r
  34 \r
  35 \r
  36         /**\r
  37          * @return description of operation including photo name\r
  38          */\r
  39         public String getDescription()\r
  40         {\r
  41                 String desc = I18nManager.getText("undo.deletephoto") + " " + _photo.getFile().getName();\r
  42                 return desc;\r
  43         }\r
  44 \r
  45 \r
  46         /**\r
  47          * Perform the undo operation on the given Track\r
  48          * @param inTrackInfo TrackInfo object on which to perform the operation\r
  49          */\r
  50         public void performUndo(TrackInfo inTrackInfo) throws UndoException\r
  51         {\r
  52                 // restore photo\r
  53                 inTrackInfo.getPhotoList().addPhoto(_photo, _photoIndex);\r
  54                 // if there's a point to restore, restore it\r
  55                 if (_point != null)\r
  56                 {\r
  57                         if (!inTrackInfo.getTrack().insertPoint(_point, _pointIndex))\r
  58                         {\r
  59                                 throw new UndoException(getDescription());\r
  60                         }\r
  61                 }\r
  62                 else\r
  63                 {\r
  64                         // update needed if not already triggered by track update\r
  65                         UpdateMessageBroker.informSubscribers();\r
  66                 }\r
  67                 // Ensure that photo is associated with point and vice versa\r
  68                 _photo.setDataPoint(_point);\r
  69                 if (_point != null)\r
  70                 {\r
  71                         _point.setPhoto(_photo);\r
  72                 }\r
  73         }\r
  74 }\r