1 files changed, 3 insertions, 0 deletions
diff --git a/StarsEx/DataSource.h b/StarsEx/DataSource.h
index 5dbc1d7..cc69870 100644
--- a/StarsEx/DataSource.h
+++ b/StarsEx/DataSource.h
@@ -24,6 +24,7 @@ public:
     explicit DataSource(Group group=Group::DEFAULT);
     virtual ~DataSource();
 
+    int Id() const;
     Group GetGroup() const;
     void SetPrefix(const char* prefix=nullptr);
 
@@ -34,6 +35,8 @@ public:
 protected:
     Text m_prefix;
     Group m_group;
+    const int m_id;
+    static int s_next_id;
 };