Version 10, May 2010

[GpsPrune.git] / tim / prune / undo / UndoLookupSrtm.java

diff --git a/tim/prune/undo/UndoLookupSrtm.java b/tim/prune/undo/UndoLookupSrtm.java
new file mode 100644 (file)
index 0000000..2672bd5
--- /dev/null
+++ b/tim/prune/undo/UndoLookupSrtm.java
@@ -0,0 +1,64 @@
+package tim.prune.undo;
+
+import tim.prune.I18nManager;
+import tim.prune.UpdateMessageBroker;
+import tim.prune.data.DataPoint;
+import tim.prune.data.Field;
+import tim.prune.data.Track;
+import tim.prune.data.TrackInfo;
+
+/**
+ * Undo lookup of altitudes from SRTM data
+ */
+public class UndoLookupSrtm implements UndoOperation
+{
+       /** DataPoint objects which didn't have altitudes before */
+       private DataPoint[] _points;
+
+
+       /**
+        * Constructor
+        * @param inTrackInfo track info object
+        */
+       public UndoLookupSrtm(TrackInfo inTrackInfo)
+       {
+               Track track = inTrackInfo.getTrack();
+               int numPoints = track.getNumPoints();
+               // Make array of points without altitudes
+               _points = new DataPoint[numPoints];
+               for (int i=0; i<numPoints; i++) {
+                       DataPoint point = track.getPoint(i);
+                       if (!point.hasAltitude()) {
+                               _points[i] = point;
+                       }
+               }
+       }
+
+
+       /**
+        * @return description of operation
+        */
+       public String getDescription()
+       {
+               return I18nManager.getText("undo.lookupsrtm");
+       }
+
+
+       /**
+        * 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
+       {
+               // Loop through points again, and reset altitudes if they have one
+               final int numPoints = _points.length;
+               for (int i=0; i<numPoints; i++) {
+                       DataPoint point = _points[i];
+                       if (point != null && point.hasAltitude()) {
+                               point.setFieldValue(Field.ALTITUDE, null, true);
+                       }
+               }
+               _points = null;
+               UpdateMessageBroker.informSubscribers();
+       }
+}