tim/prune/undo/UndoLoadPhotos.java

   1 package tim.prune.undo;\r
   2 \r
   3 import tim.prune.I18nManager;\r
   4 import tim.prune.data.TrackInfo;\r
   5 \r
   6 /**\r
   7  * Operation to undo a load photos operation\r
   8  */\r
   9 public class UndoLoadPhotos implements UndoOperation\r
  10 {\r
  11         private int _numLoaded = -1;\r
  12 \r
  13         // TODO: Handle possibility of photos not having datapoints (yet)\r
  14 \r
  15         /**\r
  16          * Constructor\r
  17          * @param inNumLoaded number of photos loaded\r
  18          */\r
  19         public UndoLoadPhotos(int inNumLoaded)\r
  20         {\r
  21                 _numLoaded = inNumLoaded;\r
  22         }\r
  23 \r
  24 \r
  25         /**\r
  26          * @return description of operation including number of photos loaded\r
  27          */\r
  28         public String getDescription()\r
  29         {\r
  30                 String desc = I18nManager.getText("undo.loadphotos");\r
  31                 if (_numLoaded > 0)\r
  32                         desc = desc + " (" + _numLoaded + ")";\r
  33                 return desc;\r
  34         }\r
  35 \r
  36 \r
  37         /**\r
  38          * Perform the undo operation on the given Track\r
  39          * Delete both track points and Photo objects\r
  40          * @param inTrackInfo TrackInfo object on which to perform the operation\r
  41          */\r
  42         public void performUndo(TrackInfo inTrackInfo) throws UndoException\r
  43         {\r
  44                 // crop track to previous size\r
  45                 int cropIndex = inTrackInfo.getTrack().getNumPoints() - _numLoaded;\r
  46                 inTrackInfo.getTrack().cropTo(cropIndex);\r
  47                 // crop photo list to previous size\r
  48                 // (currently it is assumed that the number of points is the same as number of photos)\r
  49                 cropIndex = inTrackInfo.getPhotoList().getNumPhotos() - _numLoaded;\r
  50                 inTrackInfo.getPhotoList().cropTo(cropIndex);\r
  51                 // clear selection\r
  52                 inTrackInfo.getSelection().clearAll();\r
  53         }\r
  54 }