tim/prune/undo/UndoLoad.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.PhotoList;\r
   6 import tim.prune.data.TrackInfo;\r
   7 \r
   8 /**\r
   9  * Operation to undo a load operation\r
  10  */\r
  11 public class UndoLoad implements UndoOperation\r
  12 {\r
  13         private int _cropIndex = -1;\r
  14         private int _numLoaded = -1;\r
  15         private DataPoint[] _contents = null;\r
  16         private String _previousFilename = null;\r
  17         private PhotoList _photoList = null;\r
  18 \r
  19 \r
  20         /**\r
  21          * Constructor for appending\r
  22          * @param inIndex index number of crop point\r
  23          * @param inNumLoaded number of points loaded\r
  24          */\r
  25         public UndoLoad(int inIndex, int inNumLoaded)\r
  26         {\r
  27                 _cropIndex = inIndex;\r
  28                 _numLoaded = inNumLoaded;\r
  29                 _contents = null;\r
  30                 _previousFilename = null;\r
  31         }\r
  32 \r
  33 \r
  34         /**\r
  35          * Constructor for replacing\r
  36          * @param inOldTrackInfo track info being replaced\r
  37          * @param inNumLoaded number of points loaded\r
  38          * @param inPhotoList photo list, if any\r
  39          */\r
  40         public UndoLoad(TrackInfo inOldTrackInfo, int inNumLoaded, PhotoList inPhotoList)\r
  41         {\r
  42                 _cropIndex = -1;\r
  43                 _numLoaded = inNumLoaded;\r
  44                 _contents = inOldTrackInfo.getTrack().cloneContents();\r
  45                 if (inOldTrackInfo.getFileInfo().getNumFiles() == 1)\r
  46                         _previousFilename = inOldTrackInfo.getFileInfo().getFilename();\r
  47                 _photoList = inPhotoList;\r
  48         }\r
  49 \r
  50 \r
  51         /**\r
  52          * @return description of operation including number of points loaded\r
  53          */\r
  54         public String getDescription()\r
  55         {\r
  56                 String desc = I18nManager.getText("undo.load");\r
  57                 if (_numLoaded > 0)\r
  58                         desc = desc + " (" + _numLoaded + ")";\r
  59                 return desc;\r
  60         }\r
  61 \r
  62 \r
  63         /**\r
  64          * Perform the undo operation on the given Track\r
  65          * @param inTrackInfo TrackInfo object on which to perform the operation\r
  66          */\r
  67         public void performUndo(TrackInfo inTrackInfo) throws UndoException\r
  68         {\r
  69                 // remove file from fileinfo\r
  70                 inTrackInfo.getFileInfo().removeFile();\r
  71                 if (_previousFilename != null)\r
  72                 {\r
  73                         inTrackInfo.getFileInfo().setFile(_previousFilename);\r
  74                 }\r
  75                 // Crop / replace\r
  76                 if (_contents == null)\r
  77                 {\r
  78                         // crop track to previous size\r
  79                         inTrackInfo.getTrack().cropTo(_cropIndex);\r
  80                 }\r
  81                 else\r
  82                 {\r
  83                         // replace photos how they were\r
  84                         if (_photoList != null)\r
  85                         {\r
  86                                 inTrackInfo.getPhotoList().restore(_photoList);\r
  87                         }\r
  88                         // replace track contents with old\r
  89                         if (!inTrackInfo.getTrack().replaceContents(_contents))\r
  90                         {\r
  91                                 throw new UndoException(getDescription());\r
  92                         }\r
  93                 }\r
  94                 // clear selection\r
  95                 inTrackInfo.getSelection().clearAll();\r
  96         }\r
  97 }