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