4 files changed, 178 insertions, 0 deletions
diff --git a/plugins/!NotAdopted/WinterSpeak/general/observer/observer.cpp b/plugins/!NotAdopted/WinterSpeak/general/observer/observer.cpp
new file mode 100644
index 0000000000..99e0b3a081
--- /dev/null
+++ b/plugins/!NotAdopted/WinterSpeak/general/observer/observer.cpp
@@ -0,0 +1,19 @@
+//==============================================================================
+// General Code, © 2002 Ryan Winter
+//==============================================================================
+
+#include "observer.h"
+
+#include "subject.h"
+
+#include <general/debug/debug.h>
+
+//------------------------------------------------------------------------------
+// public:
+//------------------------------------------------------------------------------
+Observer::~Observer()
+{
+    CLASSCERR("Observer::~Observer");
+}
+
+//==============================================================================
diff --git a/plugins/!NotAdopted/WinterSpeak/general/observer/observer.h b/plugins/!NotAdopted/WinterSpeak/general/observer/observer.h
new file mode 100644
index 0000000000..9f93ea91f1
--- /dev/null
+++ b/plugins/!NotAdopted/WinterSpeak/general/observer/observer.h
@@ -0,0 +1,30 @@
+#ifndef guard_general_observer_observer_observer_h
+#define guard_general_observer_observer_observer_h
+//==============================================================================
+// General Code, © 2002 Ryan Winter
+//==============================================================================
+
+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;
+};
+
+//==============================================================================
+//
+//  Summary     : Observer side of the observer pattern
+//
+//  Description : 
+//
+//==============================================================================
+
+#endif
diff --git a/plugins/!NotAdopted/WinterSpeak/general/observer/subject.cpp b/plugins/!NotAdopted/WinterSpeak/general/observer/subject.cpp
new file mode 100644
index 0000000000..e28c66c44b
--- /dev/null
+++ b/plugins/!NotAdopted/WinterSpeak/general/observer/subject.cpp
@@ -0,0 +1,77 @@
+//==============================================================================
+// General Code, © 2002 Ryan Winter
+//==============================================================================
+
+#include "subject.h"
+
+#include <general/debug/debug.h>
+
+//------------------------------------------------------------------------------
+// public:
+//------------------------------------------------------------------------------
+Subject::Subject()
+    :
+    m_observer_list()
+{
+    CLASSCERR("Subject::Subject");
+}
+
+//------------------------------------------------------------------------------
+Subject::~Subject()
+{
+    CLASSCERR("Subject::~Subject");
+}
+
+//------------------------------------------------------------------------------
+void
+Subject::notify()
+{
+    CLASSCERR("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)
+{
+    CLASSCERR("Subject::attach(" << &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)
+{
+    CLASSCERR("Subject::detach(" << &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);
+        }
+    }
+}
+
+//==============================================================================
+
diff --git a/plugins/!NotAdopted/WinterSpeak/general/observer/subject.h b/plugins/!NotAdopted/WinterSpeak/general/observer/subject.h
new file mode 100644
index 0000000000..a086e80765
--- /dev/null
+++ b/plugins/!NotAdopted/WinterSpeak/general/observer/subject.h
@@ -0,0 +1,52 @@
+#ifndef guard_general_observer_subject_h
+#define guard_general_observer_subject_h
+//==============================================================================
+// General Code, © 2002 Ryan Winter
+//==============================================================================
+
+#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;
+};
+
+//==============================================================================
+//
+//  Summary     : Subject side of the observer pattern
+//
+//  Description : Instances of this class are what is observered by observers
+//
+//==============================================================================
+
+#endif