first std::function test

src/winkeyer.cpp

@@ -103,4 +103,10 @@ void WinKeyer::run(queue_t &queue)
             m_commandState = CommandState::None;
         }
     }
+}
+
+void WinKeyer::addObserver(std::function<void()> obs) {
+    m_observers.push_back(obs);
+
+    obs();
 }