refs #335, preparation for new cockpit

* allow nested info areas
* added cockpit info area
* fixed several finder methods to excluded nested info areas from child elements
* using QScopedPointer for ui
* placeholder GUI components for new cockpit

src/blackgui/components/cockpitinfoareacomponent.h

@@ -0,0 +1,54 @@
+/* Copyright (C) 2013
+ * 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_COCKPITINFOAREACOMPONENT_H
+#define BLACKGUI_COCKPITINFOAREACOMPONENT_H
+
+#include "../infoarea.h"
+#include <QMainWindow>
+#include <QScopedPointer>
+
+namespace Ui { class CCockpitInfoAreaComponent; }
+namespace BlackGui
+{
+    namespace Components
+    {
+        //! The cockpit itself is part of the main info area, but itself also an info area.
+        //! hence windows can be docked in the cockpit too.
+        class CCockpitInfoAreaComponent : public CInfoArea
+        {
+            Q_OBJECT
+
+        public:
+            //! Destructor
+            explicit CCockpitInfoAreaComponent(QWidget *parent = nullptr);
+
+            //! Destructor
+            ~CCockpitInfoAreaComponent();
+
+        public slots:
+            //! CInfoArea::toggleFloating
+            virtual void toggleFloating() override;
+
+        protected:
+            //! \copydoc CInfoArea::getPreferredSizeWhenFloating
+            virtual QSize getPreferredSizeWhenFloating(int areaIndex) const override;
+
+            //! \copydoc CInfoArea::indexToPixmap
+            virtual const QPixmap &indexToPixmap(int areaIndex) const override;
+
+        private:
+            QScopedPointer<Ui::CCockpitInfoAreaComponent> ui;
+        };
+
+    } // namespace
+} // namespace
+#endif // guard