X-Git-Url: https://gitweb.fperrin.net/?p=GpsPrune.git;a=blobdiff_plain;f=src%2Ftim%2Fprune%2FDataStatus.java;fp=src%2Ftim%2Fprune%2FDataStatus.java;h=80ad838f7cfe147a0fd97cd0baf18ba967d325e4;hp=0000000000000000000000000000000000000000;hb=ce6f2161b8596f7018d6a76bff79bc9e571f35fd;hpb=2d8cb72e84d5cc1089ce77baf1e34ea3ea2f8465

diff --git a/src/tim/prune/DataStatus.java b/src/tim/prune/DataStatus.java
new file mode 100644
index 0000000..80ad838
--- /dev/null
+++ b/src/tim/prune/DataStatus.java
@@ -0,0 +1,34 @@
+package tim.prune;
+
+/**
+ * Class to remember the current status of the data,
+ * and make it possible to see whether the data has
+ * changed in any way since the DataStatus was requested
+ */
+public class DataStatus
+{
+	private int _undoSize = 0;
+	private int _numUndos = 0;
+
+	/**
+	 * Constructor
+	 * @param inUndoSize current size of undo stack
+	 * @param inNumUndos number of operations undone
+	 */
+	public DataStatus(int inUndoSize, int inNumUndos)
+	{
+		_undoSize = inUndoSize;
+		_numUndos = inNumUndos;
+	}
+
+	/**
+	 * Has the data changed compared to the previous status?
+	 * @param inPreviousStatus previous status obtained from App
+	 * @return true if the status is now different
+	 */
+	public boolean hasDataChanged(DataStatus inPreviousStatus)
+	{
+		return _undoSize != inPreviousStatus._undoSize
+			|| _numUndos != inPreviousStatus._numUndos;
+	}
+}