refs #475, added a utility class so the load indicator of a view can be triggered from the framing component

src/blackgui/enableforviewbasedindicator.h

@@ -0,0 +1,50 @@
+/* Copyright (C) 2015
+ * 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 and at http://www.swift-project.org/license.html. 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 BLACKGUI_ENABLEFORVIEWBASEDINDICATOR_H
+#define BLACKGUI_ENABLEFORVIEWBASEDINDICATOR_H
+
+#include "blackgui/blackguiexport.h"
+
+namespace BlackGui { namespace Views { class CViewBaseNonTemplate; }}
+
+namespace BlackGui
+{
+    //! Hand over indication task to an embedded view
+    class BLACKGUI_EXPORT CEnableForViewBasedIndicator
+    {
+    public:
+        //! Enable loading indicator
+        void enableLoadIndicator(bool enable);
+
+        //! Showing load indicator
+        bool isShowingLoadIndicator() const;
+
+        //! Show loading indicator
+        void showLoadIndicator();
+
+        //! Hide loading indicator
+        void hideLoadIndicator();
+
+    protected:
+        //! Constructor
+        CEnableForViewBasedIndicator(BlackGui::Views::CViewBaseNonTemplate *viewWithIndicator = nullptr);
+
+        //! Set the corresponding view
+        void setViewWithIndicator(BlackGui::Views::CViewBaseNonTemplate *viewWithIndicator);
+
+    private:
+        BlackGui::Views::CViewBaseNonTemplate *m_viewWithIndicator = nullptr;
+    };
+
+} // namespace
+
+#endif // guard