X-Git-Url: https://gitweb.fperrin.net/?a=blobdiff_plain;f=tim%2Fprune%2Fdata%2FTrack.java;h=9b88ade102519207d2bb730a44edc9b477386157;hb=140e9d165f85c3d4f0435a311e091209313faa2a;hp=d33886ea3f22eb2eee5057cba3bbd6a2cd9a8524;hpb=1ee49ae3c8ef3aa2e63eadd458531e5f8bd4f92c;p=GpsPrune.git

diff --git a/tim/prune/data/Track.java b/tim/prune/data/Track.java
index d33886e..9b88ade 100644
--- a/tim/prune/data/Track.java
+++ b/tim/prune/data/Track.java
@@ -292,9 +292,10 @@ public class Track
 	 * @param inStart start of range
 	 * @param inEnd end of range
 	 * @param inOffset offset to add (-ve to subtract)
+	 * @param inUndo true for undo operation
 	 * @return true on success
 	 */
-	public boolean addTimeOffset(int inStart, int inEnd, long inOffset)
+	public boolean addTimeOffset(int inStart, int inEnd, long inOffset, boolean inUndo)
 	{
 		// sanity check
 		if (inStart < 0 || inEnd < 0 || inStart >= inEnd || inEnd >= _numPoints) {
@@ -310,6 +311,7 @@ public class Track
 				// This point has a timestamp so add the offset to it
 				foundTimestamp = true;
 				timestamp.addOffset(inOffset);
+				_dataPoints[i].setModified(inUndo);
 			}
 		}
 		return foundTimestamp;
@@ -341,6 +343,7 @@ public class Track
 				// This point has an altitude so add the offset to it
 				foundAlt = true;
 				alt.addOffset(inOffset, inFormat, inDecimals);
+				_dataPoints[i].setModified(false);
 			}
 		}
 		// needs to be scaled again
@@ -748,11 +751,14 @@ public class Track
 	}
 
 	/**
-	 * @return true if track has altitude data (which are not all zero)
+	 * @return true if track has altitude data
 	 */
 	public boolean hasAltitudeData()
 	{
-		return getAltitudeRange().getMaximum() > 0;
+		for (int i=0; i<_numPoints; i++) {
+			if (_dataPoints[i].hasAltitude()) {return true;}
+		}
+		return false;
 	}
 
 	/**