refs #743, progress (bar) interface

a class supporting a kind of progress indicator can implement the interface and be updated in utility functions

src/blackcore/progress.h

@@ -0,0 +1,36 @@
+/* Copyright (C) 2016
+ * 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.
+ */
+
+#ifndef BLACKCORE_PROGRESS_H
+#define BLACKCORE_PROGRESS_H
+
+#include "application.h"
+
+namespace BlackCore
+{
+    /*!
+     * Implementing class features a progress bar or something similar.
+     * Hence such an object can be passed and the progress monitored.
+     */
+    class IProgressIndicator
+    {
+    public:
+        //! Update the progress indicator 0..100
+        virtual void updateProgressIndicator(int percentage) = 0;
+
+        //! Same as updateProgressIndicator but processing events
+        void updateProgressIndicatorAndProcessEvents(int percentage)
+        {
+            this->updateProgressIndicator(percentage);
+            BlackCore::CApplication::processEventsFor(10);
+        }
+    };
+} // ns
+
+#endif // guard