1 files changed, 17 insertions, 0 deletions
diff --git a/plugins/WinterSpeak/src/Observer.h b/plugins/WinterSpeak/src/Observer.h
new file mode 100644
index 0000000000..ec52b2c4d3
--- /dev/null
+++ b/plugins/WinterSpeak/src/Observer.h
@@ -0,0 +1,17 @@
+#pragma once
+
+
+class Subject;
+
+class Observer
+{
+  public:
+    virtual ~Observer();
+
+    //--------------------------------------------------------------------------
+    // Description : Called by a subject that this observer is observing
+    //               to signify a change in state
+    // Parameters  : subject - the subject that changed
+    //--------------------------------------------------------------------------
+    virtual void update(Subject &subject) = 0;
+};
+\ No newline at end of file