refs #392 Added BlackGui::IPluginConfig

* BlackGui::IPluginConfig is an interface for plugin configurations
* Added plugin_xplane_config target
* Adapted IPluginManager
* Adapted CPluginManagerSimulator
* Adaptem CSettingsSimulatorComponent

src/blackgui/pluginconfig.h

@@ -0,0 +1,36 @@
+/* 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.
+ *
+ * Class based on qLed: Copyright (C) 2010 by P. Sereno, http://www.sereno-online.com
+ */
+
+//! \file
+
+#ifndef BLACKGUI_PLUGINCONFIG_H
+#define BCLAKGUI_PLUGINCONFIG_H
+
+#include "blackgui/blackguiexport.h"
+#include <QtWidgets/QWidget>
+#include <QtPlugin>
+
+namespace BlackGui
+{
+    class BLACKGUI_EXPORT IPluginConfig
+    {
+
+    public:
+        virtual ~IPluginConfig() = default;
+
+        virtual QWidget *createConfigWindow() = 0;
+
+    };
+}
+
+Q_DECLARE_INTERFACE(BlackGui::IPluginConfig, "org.swift-project.blackgui.pluginconfiginterface")
+
+#endif // guard