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package tim.prune.undo;
import tim.prune.I18nManager;
import tim.prune.data.DataPoint;
import tim.prune.data.Track;
import tim.prune.data.TrackInfo;
/**
* Operation to undo the deletion of marked points
*/
public class UndoDeleteMarked implements UndoOperation
{
private DataPoint[] _contents = null;
protected int _numPointsDeleted = -1;
private boolean[] _segmentStarts = null;
/**
* Constructor
* @param inTrack track contents to copy
*/
public UndoDeleteMarked(Track inTrack)
{
_contents = inTrack.cloneContents();
// Copy boolean segment start flags
_segmentStarts = new boolean[inTrack.getNumPoints()];
for (int i=0; i<inTrack.getNumPoints(); i++) {
_segmentStarts[i] = inTrack.getPoint(i).getSegmentStart();
}
}
/**
* Set the number of points deleted
* (only known after attempted compression)
* @param inNum number of points deleted
*/
public void setNumPointsDeleted(int inNum)
{
_numPointsDeleted = inNum;
}
/**
* @return description of operation including parameters
*/
public String getDescription()
{
String desc = I18nManager.getText("undo.deletemarked");
if (_numPointsDeleted > 0)
desc = desc + " (" + _numPointsDeleted + ")";
return desc;
}
/**
* Perform the undo operation on the given Track
* @param inTrackInfo TrackInfo object on which to perform the operation
*/
public void performUndo(TrackInfo inTrackInfo) throws UndoException
{
// restore track to previous values
inTrackInfo.getTrack().replaceContents(_contents);
// Copy boolean segment start flags
Track track = inTrackInfo.getTrack();
if (_segmentStarts.length != track.getNumPoints())
throw new UndoException("Cannot undo delete - track length no longer matches");
for (int i=0; i<_segmentStarts.length; i++) {
track.getPoint(i).setSegmentStart(_segmentStarts[i]);
}
// clear selection
inTrackInfo.getSelection().clearAll();
}
}
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