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