Issue #15 Classes for sharing a single value object,

built on top of the lower level API

src/blackmisc/sharedstate/scalarmutator.h

@@ -0,0 +1,66 @@
+/* Copyright (C) 2017
+ * swift Project Community / Contributors
+ *
+ * This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
+ * directory of this distribution. No part of swift project, including this file, may be copied, modified, propagated,
+ * or distributed except according to the terms contained in the LICENSE file.
+ */
+
+//! \file
+
+#ifndef BLACKMISC_SHAREDSTATE_SCALARMUTATOR_H
+#define BLACKMISC_SHAREDSTATE_SCALARMUTATOR_H
+
+#include "blackmisc/sharedstate/passivemutator.h"
+#include "blackmisc/variant.h"
+#include "blackmisc/blackmiscexport.h"
+#include <QObject>
+#include <QMutex>
+
+namespace BlackMisc
+{
+    namespace SharedState
+    {
+        class IDataLink;
+
+        /*!
+         * Non-template base class for CScalarMutator.
+         */
+        class BLACKMISC_EXPORT CGenericScalarMutator : public QObject
+        {
+            Q_OBJECT
+
+        public:
+            //! Publish using the given transport mechanism.
+            void initialize(IDataLink *);
+
+        protected:
+            //! Constructor.
+            CGenericScalarMutator(QObject *parent) : QObject(parent) {}
+
+            //! Set scalar value as variant.
+            void setValue(const CVariant &value);
+
+        private:
+            QSharedPointer<CPassiveMutator> m_mutator = CPassiveMutator::create(this);
+        };
+
+        /*!
+         * Base class for an object that shares state with a corresponding CScalarObserver subclass object.
+         * \tparam T Datatype encapsulating the state to be shared.
+         */
+        template <typename T>
+        class CScalarMutator : public CGenericScalarMutator
+        {
+        protected:
+            //! Constructor.
+            CScalarMutator(QObject *parent) : CGenericScalarMutator(parent) {}
+
+        public:
+            //! Set scalar value.
+            void setValue(const T &value) { CGenericScalarMutator::setValue(CVariant::from(value)); }
+        };
+    }
+}
+
+#endif