(svn r25867) -Fix [FS#5764]: Shift dates on link graphs when using scenario editor date tool.

src/linkgraph/linkgraphschedule.cpp

@@ -125,6 +125,19 @@ void LinkGraphSchedule::SpawnAll()
 	inst->schedule.clear();
 }
 
+/**
+ * Shift all dates (join dates and edge annotations) of link graphs and link
+ * graph jobs by the number of days given.
+ * @param interval Number of days to be added or subtracted.
+ */
+void LinkGraphSchedule::ShiftDates(int interval)
+{
+	LinkGraph *lg;
+	FOR_ALL_LINK_GRAPHS(lg) lg->ShiftDates(interval);
+	LinkGraphJob *lgj;
+	FOR_ALL_LINK_GRAPH_JOBS(lgj) lgj->ShiftJoinDate(interval);
+}
+
 /**
  * Create a link graph schedule and initialize its handlers.
  */