X-Git-Url: http://gitweb.fperrin.net/?a=blobdiff_plain;f=tim%2Fprune%2Fundo%2FUndoAddAltitudeOffset.java;fp=tim%2Fprune%2Fundo%2FUndoAddAltitudeOffset.java;h=4dbdd08f3dc4b6f5c06d9e428662629b6d71e593;hb=112bb0c9b46894adca9a33ed8c99ea712b253185;hp=0000000000000000000000000000000000000000;hpb=54b9d8bc8f0025ccf97a67d9dd217ef1f9cf082f;p=GpsPrune.git

diff --git a/tim/prune/undo/UndoAddAltitudeOffset.java b/tim/prune/undo/UndoAddAltitudeOffset.java
new file mode 100644
index 0000000..4dbdd08
--- /dev/null
+++ b/tim/prune/undo/UndoAddAltitudeOffset.java
@@ -0,0 +1,62 @@
+package tim.prune.undo;
+
+import tim.prune.I18nManager;
+import tim.prune.UpdateMessageBroker;
+import tim.prune.data.Altitude;
+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++) {
+			inTrackInfo.getTrack().getPoint(i+_startIndex).getAltitude().reset(_altitudes[i]);
+		}
+		_altitudes = null;
+		UpdateMessageBroker.informSubscribers();
+	}
+}