qt-creator/tests/manual/dockwidgets/mainwindow.h

// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0

#pragma once

#include <QMainWindow>

class QLabel;

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow();

private:
    void createDockWindows();

    QLabel *centralWidget;
};