tim/prune/undo/UndoCompress.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.Track;\r
   6 import tim.prune.data.TrackInfo;\r
   7 \r
   8 /**\r
   9  * Operation to undo a track compression\r
  10  */\r
  11 public class UndoCompress implements UndoOperation\r
  12 {\r
  13         private DataPoint[] _contents = null;\r
  14         protected int _numPointsDeleted = -1;\r
  15 \r
  16 \r
  17         /**\r
  18          * Constructor\r
  19          * @param inTrack track contents to copy\r
  20          */\r
  21         public UndoCompress(Track inTrack)\r
  22         {\r
  23                 _contents = inTrack.cloneContents();\r
  24         }\r
  25 \r
  26 \r
  27         /**\r
  28          * Set the number of points deleted\r
  29          * (only known after attempted compression)\r
  30          * @param inNum number of points deleted\r
  31          */\r
  32         public void setNumPointsDeleted(int inNum)\r
  33         {\r
  34                 _numPointsDeleted = inNum;\r
  35         }\r
  36 \r
  37 \r
  38         /**\r
  39          * @return description of operation including parameters\r
  40          */\r
  41         public String getDescription()\r
  42         {\r
  43                 String desc = I18nManager.getText("undo.compress");\r
  44                 if (_numPointsDeleted > 0)\r
  45                         desc = desc + " (" + _numPointsDeleted + ")";\r
  46                 return desc;\r
  47         }\r
  48 \r
  49 \r
  50         /**\r
  51          * Perform the undo operation on the given Track\r
  52          * @param inTrackInfo TrackInfo object on which to perform the operation\r
  53          */\r
  54         public void performUndo(TrackInfo inTrackInfo) throws UndoException\r
  55         {\r
  56                 // restore track to previous values\r
  57                 inTrackInfo.getTrack().replaceContents(_contents);\r
  58                 // clear selection\r
  59                 inTrackInfo.getSelection().clearAll();\r
  60         }\r
  61 }