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diff --git a/src/libs/advanceddockingsystem/dockfocuscontroller.h b/src/libs/advanceddockingsystem/dockfocuscontroller.h
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+/****************************************************************************
+**
+** Copyright (C) 2020 Uwe Kindler
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 or (at your option) any later version.
+** The licenses are as published by the Free Software Foundation
+** and appearing in the file LICENSE.LGPLv21 included in the packaging
+** of this file. Please review the following information to ensure
+** the GNU Lesser General Public License version 2.1 requirements
+** will be met: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 or (at your option) any later version
+** approved by the KDE Free Qt Foundation. The licenses are as published by
+** the Free Software Foundation and appearing in the file LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#pragma once
+
+#include "ads_globals.h"
+#include "dockmanager.h"
+
+#include <QObject>
+
+namespace ADS {
+
+class DockFocusControllerPrivate;
+class DockManager;
+class FloatingDockContainer;
+
+/**
+ * Manages focus styling of dock widgets and handling of focus changes
+ */
+class ADS_EXPORT DockFocusController : public QObject
+{
+    Q_OBJECT
+
+private:
+    DockFocusControllerPrivate* d; ///< private data (pimpl)
+    friend class DockFocusControllerPrivate;
+
+private:
+    void onApplicationFocusChanged(QWidget *old, QWidget *now);
+    void onFocusedDockAreaViewToggled(bool open);
+    void onStateRestored();
+
+public:
+    /**
+     * Default Constructor
+     */
+    DockFocusController(DockManager *dockManager);
+
+    /**
+     * Virtual Destructor
+     */
+    ~DockFocusController() override;
+
+    /**
+     * Helper function to set focus depending on the configuration of the
+     * FocusStyling flag
+     */
+    template <class QWidgetPtr>
+    static void setWidgetFocus(QWidgetPtr widget)
+    {
+        if (!DockManager::testConfigFlag(DockManager::FocusHighlighting))
+            return;
+
+        widget->setFocus(Qt::OtherFocusReason);
+    }
+
+    /**
+     * A container needs to call this function if a widget has been dropped
+     * into it
+     */
+    void notifyWidgetOrAreaRelocation(QWidget *relocatedWidget);
+
+    /**
+     * This function is called, if a floating widget has been dropped into
+     * an new position.
+     * When this function is called, all dock widgets of the FloatingWidget
+     * are already inserted into its new position
+     */
+    void notifyFloatingWidgetDrop(FloatingDockContainer *floatingWidget);
+
+    /**
+     * Request a focus change to the given dock widget
+     */
+    void setDockWidgetFocused(DockWidget *focusedNow);
+}; // class DockFocusController
+
+} // namespace ADS