1 files changed, 55 insertions, 0 deletions
diff --git a/plugins/WinterSpeak/src/Subject.cpp b/plugins/WinterSpeak/src/Subject.cpp
new file mode 100644
index 0000000000..b502aac4fb
--- /dev/null
+++ b/plugins/WinterSpeak/src/Subject.cpp
@@ -0,0 +1,55 @@
+#include "Common.h"
+#include "Subject.h"
+#include "Observer.h"
+
+
+//------------------------------------------------------------------------------
+// public:
+//------------------------------------------------------------------------------
+Subject::Subject() : m_observer_list()
+{
+}
+
+//------------------------------------------------------------------------------
+Subject::~Subject()
+{
+}
+
+//------------------------------------------------------------------------------
+void Subject::notify()
+{
+    // call update for all observers in the list
+    for (std::list<Observer *>::iterator iter = m_observer_list.begin(); iter != m_observer_list.end(); ++iter)
+    {
+        (*iter)->update(*this);
+    }
+}
+
+//------------------------------------------------------------------------------
+void Subject::attach(Observer &observer)
+{
+    for (std::list<Observer *>::iterator iter = m_observer_list.begin(); iter != m_observer_list.end(); ++iter)
+    {
+        if (*iter == &observer)
+        {
+            return;
+        }
+    }
+    m_observer_list.push_back(&observer);
+}
+
+//------------------------------------------------------------------------------
+void Subject::detach(const Observer &observer)
+{
+    for (std::list<Observer *>::iterator iter = m_observer_list.begin(); iter != m_observer_list.end(); ++iter)
+    {
+        if (*iter == &observer)
+        {
+            m_observer_list.erase(iter);
+        }
+    }
+}
+
+//==============================================================================
+
+