Add a DockWidgetViewInterface

to share code between both QtQuick and QtWidget DockWidget views

src/views/DockWidgetViewInterface.h

@@ -0,0 +1,33 @@
+/*
+  This file is part of KDDockWidgets.
+
+  SPDX-FileCopyrightText: 2020-2022 Klarälvdalens Datakonsult AB, a KDAB Group company <info@kdab.com>
+  Author: Sérgio Martins <sergio.martins@kdab.com>
+
+  SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only
+
+  Contact KDAB at <info@kdab.com> for commercial licensing options.
+*/
+
+#pragma once
+
+#include "kddockwidgets/KDDockWidgets.h"
+
+namespace KDDockWidgets {
+
+namespace Controllers {
+class DockWidget;
+}
+
+namespace Views {
+
+/// @brief The interface that DockWidget views should implement
+class DOCKS_EXPORT DockWidgetViewInterface
+{
+public:
+    virtual ~DockWidgetViewInterface();
+};
+
+}
+
+}