diff --git a/src/FrameworkWidgetFactory.h b/src/FrameworkWidgetFactory.h
index c25e4d7b..13783a58 100644
--- a/src/FrameworkWidgetFactory.h
+++ b/src/FrameworkWidgetFactory.h
@@ -118,7 +118,7 @@ public:
 
     /// @brief Called internally by the framework to create a DropArea
     virtual View *createDropArea(Controllers::DropArea *, View *parent) const = 0;
-    virtual View *createMDILayout(MDILayoutWidget *, View *parent) const = 0;
+    virtual View *createMDILayout(MDILayout *, View *parent) const = 0;
 
     ///@brief Called internally by the framework to create a RubberBand to show as drop zone
     /// Returns a rubber band
diff --git a/src/MainWindowMDI.cpp b/src/MainWindowMDI.cpp
index d2ed7ab1..d77ffe5e 100644
--- a/src/MainWindowMDI.cpp
+++ b/src/MainWindowMDI.cpp
@@ -26,7 +26,7 @@ MainWindowMDI::~MainWindowMDI()
 
 void MainWindowMDI::addDockWidget(DockWidget *dockWidget, QPoint localPos, InitialOption addingOption)
 {
-    auto layout = static_cast<MDILayoutWidget *>(mainWindow()->layoutWidget());
+    auto layout = static_cast<MDILayout *>(mainWindow()->layoutWidget());
     layout->addDockWidget(dockWidget, localPos, addingOption);
 }
 
diff --git a/src/View.cpp b/src/View.cpp
index fa4150b4..b3d666c0 100644
--- a/src/View.cpp
+++ b/src/View.cpp
@@ -256,10 +256,10 @@ Controllers::DropArea *View::asDropAreaController() const
     return nullptr;
 }
 
-MDILayoutWidget *View::asMDILayoutController() const
+MDILayout *View::asMDILayoutController() const
 {
     if (!m_inDtor && m_controller && m_controller->is(Type::MDILayout))
-        return qobject_cast<MDILayoutWidget *>(m_controller);
+        return qobject_cast<MDILayout *>(m_controller);
 
     return nullptr;
 }
@@ -268,7 +268,7 @@ LayoutWidget *View::asLayout() const
 {
     if (Controllers::DropArea *da = asDropAreaController()) {
         return da;
-    } else if (MDILayoutWidget *mdi = asMDILayoutController()) {
+    } else if (MDILayout *mdi = asMDILayoutController()) {
         return mdi;
     }
 
diff --git a/src/View.h b/src/View.h
index b5a2cf68..e5ce92fb 100644
--- a/src/View.h
+++ b/src/View.h
@@ -38,7 +38,7 @@ namespace KDDockWidgets {
 class ViewWrapper;
 class Controller;
 class Window;
-class MDILayoutWidget;
+class MDILayout;
 class LayoutWidget;
 
 namespace Controllers {
@@ -246,7 +246,7 @@ public:
     Controllers::DockWidget *asDockWidgetController() const;
     Controllers::MainWindow *asMainWindowController() const;
     Controllers::DropArea *asDropAreaController() const;
-    MDILayoutWidget *asMDILayoutController() const;
+    MDILayout *asMDILayoutController() const;
     LayoutWidget *asLayout() const;
 
     /// @brief returns whether this view is inside the specified window
diff --git a/src/controllers/DockWidget.cpp b/src/controllers/DockWidget.cpp
index 68827c2d..2b57d47d 100644
--- a/src/controllers/DockWidget.cpp
+++ b/src/controllers/DockWidget.cpp
@@ -555,7 +555,7 @@ void DockWidget::Private::maybeMorphIntoFloatingWindow()
         morphIntoFloatingWindow();
 }
 
-MDILayoutWidget *DockWidget::Private::mdiLayout() const
+MDILayout *DockWidget::Private::mdiLayout() const
 {
     auto p = q->view()->parentView();
     while (p) {
@@ -907,7 +907,7 @@ int DockWidget::userType() const
 
 void DockWidget::setMDIPosition(QPoint pos)
 {
-    if (MDILayoutWidget *layout = d->mdiLayout()) {
+    if (MDILayout *layout = d->mdiLayout()) {
         if (auto wrapperDW = d->mdiDockWidgetWrapper()) {
             // Case of using Option_MDINestable. We need to layout the actual top level DW
             layout->moveDockWidget(wrapperDW, pos);
@@ -919,7 +919,7 @@ void DockWidget::setMDIPosition(QPoint pos)
 
 void DockWidget::setMDISize(QSize size)
 {
-    if (MDILayoutWidget *layout = d->mdiLayout()) {
+    if (MDILayout *layout = d->mdiLayout()) {
         if (auto wrapperDW = d->mdiDockWidgetWrapper()) {
             // Case of using Option_MDINestable. We need to layout the actual top level DW
             layout->resizeDockWidget(wrapperDW, size);
diff --git a/src/controllers/DockWidget_p.h b/src/controllers/DockWidget_p.h
index f4fbfea0..c991a794 100644
--- a/src/controllers/DockWidget_p.h
+++ b/src/controllers/DockWidget_p.h
@@ -140,7 +140,7 @@ public:
     void maybeMorphIntoFloatingWindow();
 
     /// @brief Returns the mdi layout this dock widget is in, if any.
-    MDILayoutWidget *mdiLayout() const;
+    MDILayout *mdiLayout() const;
 
     /// @brief Returns if this is an helper DockWidget created automatically to host a drop area inside MDI
     /// This is only used by the DockWidget::Option_MDINestable feature
diff --git a/src/controllers/Frame.cpp b/src/controllers/Frame.cpp
index a2fd2132..87e8bb91 100644
--- a/src/controllers/Frame.cpp
+++ b/src/controllers/Frame.cpp
@@ -935,7 +935,7 @@ DropArea *Frame::mdiDropAreaWrapper() const
     return nullptr;
 }
 
-MDILayoutWidget *Frame::mdiLayoutWidget() const
+MDILayout *Frame::mdiLayoutWidget() const
 {
     return m_layoutWidget ? m_layoutWidget->asMDILayout() : nullptr;
 }
diff --git a/src/controllers/Frame.h b/src/controllers/Frame.h
index afdb2efc..bb13374b 100644
--- a/src/controllers/Frame.h
+++ b/src/controllers/Frame.h
@@ -27,7 +27,7 @@
 class TestDocks;
 
 namespace KDDockWidgets {
-class MDILayoutWidget;
+class MDILayout;
 class WidgetResizeHandler;
 }
 
@@ -281,7 +281,7 @@ public:
     Frame *mdiFrame() const;
 
     /// @brief Returns the MDI layout. Or nullptr if this frame isn't in a MDI layout
-    MDILayoutWidget *mdiLayoutWidget() const;
+    MDILayout *mdiLayoutWidget() const;
 
     /// @brief If this frame is a MDI frame (isMDI() == true), returns whether it contains nested dock widgets (DockWidget::Option_MDINestable)
     /// @sa isMDI()
diff --git a/src/controllers/MDILayout.cpp b/src/controllers/MDILayout.cpp
index f1c3ffbc..330f7a77 100644
--- a/src/controllers/MDILayout.cpp
+++ b/src/controllers/MDILayout.cpp
@@ -19,18 +19,18 @@
 using namespace KDDockWidgets;
 using namespace KDDockWidgets::Controllers;
 
-MDILayoutWidget::MDILayoutWidget(View *parent)
+MDILayout::MDILayout(View *parent)
     : LayoutWidget(Type::MDILayout, Config::self().frameworkWidgetFactory()->createMDILayout(this, parent))
     , m_rootItem(new Layouting::ItemFreeContainer(view()))
 {
     setRootItem(m_rootItem);
 }
 
-MDILayoutWidget::~MDILayoutWidget()
+MDILayout::~MDILayout()
 {
 }
 
-void MDILayoutWidget::addDockWidget(Controllers::DockWidget *dw, QPoint localPt, InitialOption addingOption)
+void MDILayout::addDockWidget(Controllers::DockWidget *dw, QPoint localPt, InitialOption addingOption)
 {
     if (!dw) {
         qWarning() << Q_FUNC_INFO << "Refusing to add null dock widget";
@@ -62,7 +62,7 @@ void MDILayoutWidget::addDockWidget(Controllers::DockWidget *dw, QPoint localPt,
     }
 }
 
-void MDILayoutWidget::setDockWidgetGeometry(Controllers::Frame *frame, QRect geometry)
+void MDILayout::setDockWidgetGeometry(Controllers::Frame *frame, QRect geometry)
 {
     if (!frame)
         return;
@@ -76,12 +76,12 @@ void MDILayoutWidget::setDockWidgetGeometry(Controllers::Frame *frame, QRect geo
     item->setGeometry(geometry);
 }
 
-void MDILayoutWidget::moveDockWidget(Controllers::DockWidget *dw, QPoint pos)
+void MDILayout::moveDockWidget(Controllers::DockWidget *dw, QPoint pos)
 {
     moveDockWidget(dw->d->frame(), pos);
 }
 
-void MDILayoutWidget::moveDockWidget(Controllers::Frame *frame, QPoint pos)
+void MDILayout::moveDockWidget(Controllers::Frame *frame, QPoint pos)
 {
     if (!frame)
         return;
@@ -97,12 +97,12 @@ void MDILayoutWidget::moveDockWidget(Controllers::Frame *frame, QPoint pos)
     item->setGeometry(geo);
 }
 
-void MDILayoutWidget::resizeDockWidget(Controllers::DockWidget *dw, QSize size)
+void MDILayout::resizeDockWidget(Controllers::DockWidget *dw, QSize size)
 {
     resizeDockWidget(dw->d->frame(), size);
 }
 
-void MDILayoutWidget::resizeDockWidget(Controllers::Frame *frame, QSize size)
+void MDILayout::resizeDockWidget(Controllers::Frame *frame, QSize size)
 {
     if (!frame)
         return;
diff --git a/src/controllers/MDILayout.h b/src/controllers/MDILayout.h
index de15c7e8..aec898f2 100644
--- a/src/controllers/MDILayout.h
+++ b/src/controllers/MDILayout.h
@@ -32,12 +32,12 @@ namespace KDDockWidgets {
  * @brief The MDILayoutWidget class implements a layout suitable for MDI style docking.
  * Where dock widgets are free to be positioned in arbitrary positions, not restricted by layouting.
  */
-class DOCKS_EXPORT MDILayoutWidget : public LayoutWidget
+class DOCKS_EXPORT MDILayout : public LayoutWidget
 {
     Q_OBJECT
 public:
-    explicit MDILayoutWidget(View *parent = nullptr);
-    ~MDILayoutWidget() override;
+    explicit MDILayout(View *parent = nullptr);
+    ~MDILayout() override;
 
     /// @brief docks the dock widgets into this MDI area, at the specified position
     void addDockWidget(Controllers::DockWidget *dw, QPoint localPt, InitialOption addingOption = {});
diff --git a/src/controllers/MainWindow.cpp b/src/controllers/MainWindow.cpp
index 06904090..6c6ed94c 100644
--- a/src/controllers/MainWindow.cpp
+++ b/src/controllers/MainWindow.cpp
@@ -41,7 +41,7 @@ using namespace KDDockWidgets::Controllers;
 static LayoutWidget *createLayoutWidget(MainWindow *mainWindow, MainWindowOptions options)
 {
     if (options & MainWindowOption_MDI)
-        return new MDILayoutWidget(mainWindow->view());
+        return new MDILayout(mainWindow->view());
 
     return new DropArea(mainWindow->view(), options);
 }
@@ -217,7 +217,7 @@ LayoutWidget *MainWindow::layoutWidget() const
     return d->m_layoutWidget;
 }
 
-MDILayoutWidget *MainWindow::mdiLayoutWidget() const
+MDILayout *MainWindow::mdiLayoutWidget() const
 {
     return d->m_layoutWidget->asMDILayout();
 }
diff --git a/src/controllers/MainWindow.h b/src/controllers/MainWindow.h
index 406ba479..861c3574 100644
--- a/src/controllers/MainWindow.h
+++ b/src/controllers/MainWindow.h
@@ -32,7 +32,7 @@ class TestDocks;
 
 namespace KDDockWidgets {
 
-class MDILayoutWidget;
+class MDILayout;
 class LayoutWidget;
 
 namespace Controllers {
@@ -128,7 +128,7 @@ public:
 
     ///@internal
     ///@brief Returns the MDI layout. Or nullptr if this isn't a MDI main window
-    MDILayoutWidget *mdiLayoutWidget() const;
+    MDILayout *mdiLayoutWidget() const;
 
     /**
      * @brief Sets the affinities names. Dock widgets can only dock into main windows of the same affinity.
diff --git a/src/private/LayoutWidget.cpp b/src/private/LayoutWidget.cpp
index c4c3e810..7db8474d 100644
--- a/src/private/LayoutWidget.cpp
+++ b/src/private/LayoutWidget.cpp
@@ -325,7 +325,7 @@ Controllers::DropArea *LayoutWidget::asDropArea() const
     return view()->asDropAreaController();
 }
 
-MDILayoutWidget *LayoutWidget::asMDILayout() const
+MDILayout *LayoutWidget::asMDILayout() const
 {
     return view()->asMDILayoutController();
 }
diff --git a/src/private/LayoutWidget_p.h b/src/private/LayoutWidget_p.h
index 73c0ee48..9d7479f3 100644
--- a/src/private/LayoutWidget_p.h
+++ b/src/private/LayoutWidget_p.h
@@ -191,7 +191,7 @@ public:
     LayoutSaver::MultiSplitter serialize() const;
 
     Controllers::DropArea *asDropArea() const;
-    MDILayoutWidget *asMDILayout() const;
+    MDILayout *asMDILayout() const;
 
     /// @brief Emitted when the count of visible widgets changes
     KDBindings::Signal<int> visibleWidgetCountChanged;
diff --git a/src/private/MDILayoutWidget_p.h b/src/private/MDILayoutWidget_p.h
new file mode 100644
index 00000000..3ae0aa79
--- /dev/null
+++ b/src/private/MDILayoutWidget_p.h
@@ -0,0 +1,68 @@
+/*
+  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.
+*/
+
+
+
+#ifndef KDDOCKWIDGETS_MDI_LAYOUT_WIDGET_P_H
+#define KDDOCKWIDGETS_MDI_LAYOUT_WIDGET_P_H
+
+#include "LayoutWidget_p.h"
+#include "kddockwidgets/KDDockWidgets.h"
+#include "kddockwidgets/docks_export.h"
+
+#include "qtwidgets/views/View_qtwidgets.h"
+
+namespace Layouting {
+class ItemFreeContainer;
+}
+
+// TODOv2: Move to controllers/
+
+namespace KDDockWidgets {
+
+/**
+ * @brief The MDILayoutWidget class implements a layout suitable for MDI style docking.
+ * Where dock widgets are free to be positioned in arbitrary positions, not restricted by layouting.
+ */
+class DOCKS_EXPORT MDILayout : public LayoutWidget
+{
+    Q_OBJECT
+public:
+    explicit MDILayout(View *parent = nullptr);
+    ~MDILayout() override;
+
+    /// @brief docks the dock widgets into this MDI area, at the specified position
+    void addDockWidget(Controllers::DockWidget *dw, QPoint localPt, InitialOption addingOption = {});
+
+    /// @brief Moves a dock widget @p dw to point @p pos
+    void moveDockWidget(Controllers::DockWidget *dw, QPoint pos);
+
+    /// @brief Moves a dock widget @p f to point @p pos
+    /// Convenience overload.
+    void moveDockWidget(Controllers::Frame *f, QPoint pos);
+
+    /// @brief Sets the size of dock widget @p dw to @p size
+    void resizeDockWidget(Controllers::DockWidget *dw, QSize size);
+
+    /// @brief Sets the size of dock widget @p f to @p size
+    /// Convenience overload.
+    void resizeDockWidget(Controllers::Frame *f, QSize size);
+
+    /// @brief sets the size and position of the dock widget @p f
+    void setDockWidgetGeometry(Controllers::Frame *f, QRect);
+
+private:
+    Layouting::ItemFreeContainer *const m_rootItem;
+};
+
+}
+
+#endif
diff --git a/src/qtquick/FrameworkWidgetFactory_qtquick.cpp b/src/qtquick/FrameworkWidgetFactory_qtquick.cpp
index 47afcbe9..79551025 100644
--- a/src/qtquick/FrameworkWidgetFactory_qtquick.cpp
+++ b/src/qtquick/FrameworkWidgetFactory_qtquick.cpp
@@ -187,7 +187,7 @@ View *DefaultWidgetFactory_qtquick::createDropArea(Controllers::DropArea *contro
     return new Views::DropArea_qtquick(controller, parent);
 }
 
-View *DefaultWidgetFactory_qtquick::createMDILayout(MDILayoutWidget *controller, View *parent) const
+View *DefaultWidgetFactory_qtquick::createMDILayout(MDILayout *controller, View *parent) const
 {
     return new Views::MDILayout_qtquick(controller, parent);
 }
diff --git a/src/qtquick/FrameworkWidgetFactory_qtquick.h b/src/qtquick/FrameworkWidgetFactory_qtquick.h
index 418c1478..eab26e93 100644
--- a/src/qtquick/FrameworkWidgetFactory_qtquick.h
+++ b/src/qtquick/FrameworkWidgetFactory_qtquick.h
@@ -69,7 +69,7 @@ public:
     View *createRubberBand(View *parent) const override;
     View *createSideBar(Controllers::SideBar *, Controllers::MainWindow *parent) const override;
     View *createDropArea(Controllers::DropArea *, View *parent) const override;
-    View *createMDILayout(MDILayoutWidget *, View *parent) const override;
+    View *createMDILayout(MDILayout *, View *parent) const override;
 
     Q_INVOKABLE QUrl titleBarFilename() const;
     QUrl dockwidgetFilename() const;
diff --git a/src/qtquick/views/MDILayout_qtquick.cpp b/src/qtquick/views/MDILayout_qtquick.cpp
index 66fad56b..85028b21 100644
--- a/src/qtquick/views/MDILayout_qtquick.cpp
+++ b/src/qtquick/views/MDILayout_qtquick.cpp
@@ -15,7 +15,7 @@
 using namespace KDDockWidgets;
 using namespace KDDockWidgets::Views;
 
-MDILayout_qtquick::MDILayout_qtquick(MDILayoutWidget *controller, View *parent)
+MDILayout_qtquick::MDILayout_qtquick(MDILayout *controller, View *parent)
     : Views::View_qtquick(controller, Type::MDILayout, asQQuickItem(parent))
     , m_controller(controller)
 {
diff --git a/src/qtquick/views/MDILayout_qtquick.h b/src/qtquick/views/MDILayout_qtquick.h
index 42fa2af2..195e9230 100644
--- a/src/qtquick/views/MDILayout_qtquick.h
+++ b/src/qtquick/views/MDILayout_qtquick.h
@@ -15,7 +15,7 @@
 #include "View_qtquick.h"
 
 namespace KDDockWidgets {
-class MDILayoutWidget;
+class MDILayout;
 
 namespace Views {
 
@@ -23,7 +23,7 @@ class DOCKS_EXPORT MDILayout_qtquick : public Views::View_qtquick
 {
     Q_OBJECT
 public:
-    explicit MDILayout_qtquick(MDILayoutWidget *controller, View *parent);
+    explicit MDILayout_qtquick(MDILayout *controller, View *parent);
     ~MDILayout_qtquick();
 
     /// TODOv2
@@ -31,7 +31,7 @@ public:
     bool onResize(QSize newSize) override;
 
 private:
-    MDILayoutWidget *const m_controller;
+    MDILayout *const m_controller;
 };
 
 }
diff --git a/src/qtwidgets/FrameworkWidgetFactory_qtwidgets.cpp b/src/qtwidgets/FrameworkWidgetFactory_qtwidgets.cpp
index f0726d2d..2cd5c055 100644
--- a/src/qtwidgets/FrameworkWidgetFactory_qtwidgets.cpp
+++ b/src/qtwidgets/FrameworkWidgetFactory_qtwidgets.cpp
@@ -192,7 +192,7 @@ View *DefaultWidgetFactory_qtwidgets::createDropArea(Controllers::DropArea *cont
     return new Views::DropArea_qtwidgets(controller, parent);
 }
 
-View *DefaultWidgetFactory_qtwidgets::createMDILayout(MDILayoutWidget *controller, View *parent) const
+View *DefaultWidgetFactory_qtwidgets::createMDILayout(MDILayout *controller, View *parent) const
 {
     return new Views::MDILayout_qtwidgets(controller, parent);
 }
diff --git a/src/qtwidgets/FrameworkWidgetFactory_qtwidgets.h b/src/qtwidgets/FrameworkWidgetFactory_qtwidgets.h
index 7d2181be..de8e62f7 100644
--- a/src/qtwidgets/FrameworkWidgetFactory_qtwidgets.h
+++ b/src/qtwidgets/FrameworkWidgetFactory_qtwidgets.h
@@ -69,7 +69,7 @@ public:
     View *createRubberBand(View *parent) const override;
     View *createSideBar(Controllers::SideBar *, Controllers::MainWindow *parent) const override;
     View *createDropArea(Controllers::DropArea *, View *parent) const override;
-    View *createMDILayout(MDILayoutWidget *, View *parent) const override;
+    View *createMDILayout(MDILayout *, View *parent) const override;
     QIcon iconForButtonType(TitleBarButtonType type, qreal dpr) const override;
     QAbstractButton *createTitleBarButton(QWidget *parent, TitleBarButtonType) const;
 
diff --git a/src/qtwidgets/MDIArea.cpp b/src/qtwidgets/MDIArea.cpp
index 7340de0d..ecae5312 100644
--- a/src/qtwidgets/MDIArea.cpp
+++ b/src/qtwidgets/MDIArea.cpp
@@ -30,7 +30,7 @@ class MDIArea::Private
 {
 public:
     Private(View *parent)
-        : layoutWidget(new MDILayoutWidget(parent))
+        : layoutWidget(new MDILayout(parent))
     {
     }
 
@@ -39,7 +39,7 @@ public:
         delete layoutWidget;
     }
 
-    MDILayoutWidget *const layoutWidget;
+    MDILayout *const layoutWidget;
 };
 
 MDIArea::MDIArea(QWidget *parent)
diff --git a/src/qtwidgets/MDIArea.h b/src/qtwidgets/MDIArea.h
index 6782c7b0..f9538882 100644
--- a/src/qtwidgets/MDIArea.h
+++ b/src/qtwidgets/MDIArea.h
@@ -18,7 +18,7 @@
 
 namespace KDDockWidgets {
 
-class MDILayoutWidget;
+class MDILayout;
 
 namespace Controllers {
 class Frame;
diff --git a/src/qtwidgets/views/MDILayout_qtwidgets.cpp b/src/qtwidgets/views/MDILayout_qtwidgets.cpp
index 66611cc9..9a99890f 100644
--- a/src/qtwidgets/views/MDILayout_qtwidgets.cpp
+++ b/src/qtwidgets/views/MDILayout_qtwidgets.cpp
@@ -15,7 +15,7 @@
 using namespace KDDockWidgets;
 using namespace KDDockWidgets::Views;
 
-MDILayout_qtwidgets::MDILayout_qtwidgets(MDILayoutWidget *controller, View *parent)
+MDILayout_qtwidgets::MDILayout_qtwidgets(MDILayout *controller, View *parent)
     : Views::View_qtwidgets<QWidget>(controller, Type::MDILayout, parent ? qobject_cast<QWidget *>(parent->asQObject()) : nullptr)
     , m_controller(controller)
 {
diff --git a/src/qtwidgets/views/MDILayout_qtwidgets.h b/src/qtwidgets/views/MDILayout_qtwidgets.h
index 7a4ee50a..c09e568d 100644
--- a/src/qtwidgets/views/MDILayout_qtwidgets.h
+++ b/src/qtwidgets/views/MDILayout_qtwidgets.h
@@ -15,7 +15,7 @@
 #include "qtwidgets/views/View_qtwidgets.h"
 
 namespace KDDockWidgets {
-class MDILayoutWidget;
+class MDILayout;
 
 namespace Views {
 
@@ -23,7 +23,7 @@ class DOCKS_EXPORT MDILayout_qtwidgets : public Views::View_qtwidgets<QWidget>
 {
     Q_OBJECT
 public:
-    explicit MDILayout_qtwidgets(MDILayoutWidget *controller, View *parent);
+    explicit MDILayout_qtwidgets(MDILayout *controller, View *parent);
     ~MDILayout_qtwidgets();
 
     /// TODOv2
@@ -31,7 +31,7 @@ public:
     bool onResize(QSize newSize) override;
 
 private:
-    MDILayoutWidget *const m_controller;
+    MDILayout *const m_controller;
 };
 
 }