X-Git-Url: http://gitweb.fperrin.net/?p=GpsPrune.git;a=blobdiff_plain;f=src%2Ftim%2Fprune%2Fundo%2FUndoAddAltitudeOffset.java;fp=src%2Ftim%2Fprune%2Fundo%2FUndoAddAltitudeOffset.java;h=ffaabdd7ca77021a6c3de9126cb66d4cc81754b5;hp=0000000000000000000000000000000000000000;hb=ce6f2161b8596f7018d6a76bff79bc9e571f35fd;hpb=2d8cb72e84d5cc1089ce77baf1e34ea3ea2f8465

diff --git a/src/tim/prune/undo/UndoAddAltitudeOffset.java b/src/tim/prune/undo/UndoAddAltitudeOffset.java
new file mode 100644
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+++ b/src/tim/prune/undo/UndoAddAltitudeOffset.java
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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();
+	}
+}