Add menu item to remove altitudes from track

[GpsPrune.git] / src / tim / prune / undo / UndoRemoveAltitudes.java

diff --git a/src/tim/prune/undo/UndoRemoveAltitudes.java b/src/tim/prune/undo/UndoRemoveAltitudes.java
new file mode 100644 (file)
index 0000000..48f0aba
--- /dev/null
+++ b/src/tim/prune/undo/UndoRemoveAltitudes.java
@@ -0,0 +1,65 @@
+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 UndoRemoveAltitudes implements UndoOperation
+{
+       /** Start index of section */
+       private int _startIndex;
+       /** altitude values before operation */
+       private Altitude[] _altitudes;
+
+
+       /**
+        * Constructor
+        * @param inTrackInfo track info object
+        */
+       public UndoRemoveAltitudes(TrackInfo inTrackInfo, int inStart, int inEnd)
+       {
+               _startIndex = inStart;
+               final int numPoints = inEnd - inStart + 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.removealtitudes") + " (" + (_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();
+       }
+}