tim/prune/undo/UndoDisconnectPhoto.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 the disconnection of a photo from a point\r
  11  */\r
  12 public class UndoDisconnectPhoto implements UndoOperation\r
  13 {\r
  14         private DataPoint _point = null;\r
  15         private Photo _photo = null;\r
  16         private String _filename = null;\r
  17 \r
  18 \r
  19         /**\r
  20          * Constructor\r
  21          * @param inPoint data point\r
  22          * @param inFilename filename of photo\r
  23          */\r
  24         public UndoDisconnectPhoto(DataPoint inPoint, String inFilename)\r
  25         {\r
  26                 _point = inPoint;\r
  27                 _photo = inPoint.getPhoto();\r
  28                 _filename = inFilename;\r
  29         }\r
  30 \r
  31 \r
  32         /**\r
  33          * @return description of operation including photo filename\r
  34          */\r
  35         public String getDescription()\r
  36         {\r
  37                 String desc = I18nManager.getText("undo.disconnectphoto") + " " + _filename;\r
  38                 return desc;\r
  39         }\r
  40 \r
  41 \r
  42         /**\r
  43          * Perform the undo operation on the given Track\r
  44          * @param inTrackInfo TrackInfo object on which to perform the operation\r
  45          */\r
  46         public void performUndo(TrackInfo inTrackInfo) throws UndoException\r
  47         {\r
  48                 // Connect again\r
  49                 if (_point != null && _photo != null)\r
  50                 {\r
  51                         _point.setPhoto(_photo);\r
  52                         _photo.setDataPoint(_point);\r
  53                         // inform subscribers\r
  54                         UpdateMessageBroker.informSubscribers();\r
  55                 }\r
  56                 else\r
  57                 {\r
  58                         // throw exception if failed\r
  59                         throw new UndoException(getDescription());\r
  60                 }\r
  61         }\r
  62 }