1 files changed, 38 insertions, 0 deletions
diff --git a/plugins/WinterSpeak/src/Subject.h b/plugins/WinterSpeak/src/Subject.h
new file mode 100644
index 0000000000..f4bba3b075
--- /dev/null
+++ b/plugins/WinterSpeak/src/Subject.h
@@ -0,0 +1,38 @@
+#pragma once
+
+#include "Observer.h"
+
+#include <list>
+class Subject
+{
+public:
+    Subject();
+    virtual ~Subject();
+
+    //--------------------------------------------------------------------------
+    // Description : Notify all observers of a state change
+    //--------------------------------------------------------------------------
+    void notify();
+
+    //--------------------------------------------------------------------------
+    // Description : Attach an observer to the subject
+    // Parameters  : observer - the observer
+    //--------------------------------------------------------------------------
+    void attach(Observer &observer);
+
+    //--------------------------------------------------------------------------
+    // Description : Detach an observer from the subject
+    // Parameters  : observer - the observer
+    //--------------------------------------------------------------------------
+    void detach(const Observer &observer);
+
+  private:
+    //--------------------------------------------------------------------------
+    // Description : Disallow assignment operator and copy constructor
+    //--------------------------------------------------------------------------
+    Subject(const Subject &rhs);
+    const Subject & operator=(const Subject &rhs);
+
+    std::list<Observer *> m_observer_list;
+};
+