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package tim.prune.undo;
import tim.prune.I18nManager;
import tim.prune.UpdateMessageBroker;
import tim.prune.data.Altitude;
import tim.prune.data.DataPoint;
import tim.prune.data.TrackInfo;
/**
* Undo addition/subtraction of an altitude offset
*/
public class UndoAddAltitudeOffset implements UndoOperation
{
/** Start index of section */
private int _startIndex;
/** altitude values before operation */
private Altitude[] _altitudes;
/**
* Constructor
* @param inTrackInfo track info object
*/
public UndoAddAltitudeOffset(TrackInfo inTrackInfo)
{
_startIndex = inTrackInfo.getSelection().getStart();
final int endIndex = inTrackInfo.getSelection().getEnd();
final int numPoints = endIndex - _startIndex + 1;
// Make array of cloned altitude objects
_altitudes = new Altitude[numPoints];
for (int i=0; i<numPoints; i++) {
Altitude a = inTrackInfo.getTrack().getPoint(_startIndex+i).getAltitude();
if (a != null && a.isValid()) {
_altitudes[i] = a.clone();
}
}
}
/**
* @return description of operation including number of points adjusted
*/
public String getDescription()
{
return I18nManager.getText("undo.addaltitudeoffset") + " (" + (_altitudes.length) + ")";
}
/**
* 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
{
// Perform the inverse operation
final int numPoints = _altitudes.length;
for (int i=0; i<numPoints; i++)
{
DataPoint point = inTrackInfo.getTrack().getPoint(i+_startIndex);
point.resetAltitude(_altitudes[i]);
}
_altitudes = null;
inTrackInfo.getSelection().markInvalid();
UpdateMessageBroker.informSubscribers();
}
}
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