Adding upstream version 1:7.0.4.upstream/1%7.0.4upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

29 files changed, 2535 insertions, 0 deletions

diff --git a/vcl/inc/qt5/Qt5AccessibleEventListener.hxx b/vcl/inc/qt5/Qt5AccessibleEventListener.hxx
new file mode 100644
index 000000000..0fd3783ee
--- /dev/null
+++ b/vcl/inc/qt5/Qt5AccessibleEventListener.hxx
@@ -0,0 +1,38 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+#include <com/sun/star/accessibility/XAccessible.hpp>
+#include <com/sun/star/accessibility/XAccessibleEventListener.hpp>
+#include <com/sun/star/lang/EventObject.hpp>
+
+#include "Qt5AccessibleWidget.hxx"
+
+#include <cppuhelper/implbase.hxx>
+
+class Qt5AccessibleEventListener final
+    : public cppu::WeakImplHelper<css::accessibility::XAccessibleEventListener>
+{
+public:
+    Qt5AccessibleEventListener(
+        const css::uno::Reference<css::accessibility::XAccessible> xAccessible,
+        Qt5AccessibleWidget* pAccessibleWidget);
+
+    virtual void SAL_CALL
+    notifyEvent(const css::accessibility::AccessibleEventObject& aEvent) override;
+
+    virtual void SAL_CALL disposing(const css::lang::EventObject& Source) override;
+
+private:
+    css::uno::Reference<css::accessibility::XAccessible> m_xAccessible;
+    Qt5AccessibleWidget* m_pAccessibleWidget;
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/inc/qt5/Qt5AccessibleWidget.hxx b/vcl/inc/qt5/Qt5AccessibleWidget.hxx
new file mode 100644
index 000000000..aacaba9a8
--- /dev/null
+++ b/vcl/inc/qt5/Qt5AccessibleWidget.hxx
@@ -0,0 +1,144 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+#include <vclpluginapi.h>
+
+#include <QtCore/QObject>
+#include <QtCore/QPair>
+#include <QtCore/QString>
+#include <QtCore/QStringList>
+#include <QtCore/QVector>
+#include <QtGui/QAccessible>
+#include <QtGui/QAccessibleActionInterface>
+#include <QtGui/QAccessibleInterface>
+#include <QtGui/QAccessibleTableInterface>
+#include <QtGui/QAccessibleTextInterface>
+#include <QtGui/QAccessibleValueInterface>
+#include <QtGui/QColor>
+#include <QtGui/QWindow>
+
+#include <com/sun/star/accessibility/XAccessible.hpp>
+
+class Qt5Frame;
+class Qt5Widget;
+
+class Qt5AccessibleWidget final : public QObject,
+                                  public QAccessibleInterface,
+                                  public QAccessibleActionInterface,
+                                  public QAccessibleTextInterface,
+                                  public QAccessibleEditableTextInterface,
+                                  public QAccessibleTableInterface,
+                                  public QAccessibleValueInterface
+{
+    Q_OBJECT
+
+public:
+    Qt5AccessibleWidget(const css::uno::Reference<css::accessibility::XAccessible> xAccessible,
+                        QObject* pObject);
+    QWindow* window() const override;
+    int childCount() const override;
+    int indexOfChild(const QAccessibleInterface* child) const override;
+    QVector<QPair<QAccessibleInterface*, QAccessible::Relation>>
+    relations(QAccessible::Relation match = QAccessible::AllRelations) const override;
+    QAccessibleInterface* focusChild() const override;
+
+    QRect rect() const override;
+
+    QAccessibleInterface* parent() const override;
+    QAccessibleInterface* child(int index) const override;
+
+    QString text(QAccessible::Text t) const override;
+    QAccessible::Role role() const override;
+    QAccessible::State state() const override;
+
+    QColor foregroundColor() const override;
+    QColor backgroundColor() const override;
+
+    bool isValid() const override;
+    QObject* object() const override;
+    void setText(QAccessible::Text t, const QString& text) override;
+    QAccessibleInterface* childAt(int x, int y) const override;
+
+    void* interface_cast(QAccessible::InterfaceType t) override;
+
+    // QAccessibleActionInterface
+    QStringList actionNames() const override;
+    void doAction(const QString& actionName) override;
+    QStringList keyBindingsForAction(const QString& actionName) const override;
+
+    static QAccessibleValueInterface* valueInterface();
+    static QAccessibleTextInterface* textInterface();
+
+    // QAccessibleTextInterface
+    void addSelection(int startOffset, int endOffset) override;
+    QString attributes(int offset, int* startOffset, int* endOffset) const override;
+    int characterCount() const override;
+    QRect characterRect(int offset) const override;
+    int cursorPosition() const override;
+    int offsetAtPoint(const QPoint& point) const override;
+    void removeSelection(int selectionIndex) override;
+    void scrollToSubstring(int startIndex, int endIndex) override;
+    void selection(int selectionIndex, int* startOffset, int* endOffset) const override;
+    int selectionCount() const override;
+    void setCursorPosition(int position) override;
+    void setSelection(int selectionIndex, int startOffset, int endOffset) override;
+    QString text(int startOffset, int endOffset) const override;
+    QString textAfterOffset(int offset, QAccessible::TextBoundaryType boundaryType,
+                            int* startOffset, int* endOffset) const override;
+    QString textAtOffset(int offset, QAccessible::TextBoundaryType boundaryType, int* startOffset,
+                         int* endOffset) const override;
+    QString textBeforeOffset(int offset, QAccessible::TextBoundaryType boundaryType,
+                             int* startOffset, int* endOffset) const override;
+
+    // QAccessibleEditableTextInterface
+    virtual void deleteText(int startOffset, int endOffset) override;
+    virtual void insertText(int offset, const QString& text) override;
+    virtual void replaceText(int startOffset, int endOffset, const QString& text) override;
+
+    // QAccessibleValueInterface
+    QVariant currentValue() const override;
+    QVariant maximumValue() const override;
+    QVariant minimumStepSize() const override;
+    QVariant minimumValue() const override;
+    void setCurrentValue(const QVariant& value) override;
+
+    // QAccessibleTableInterface
+    virtual QAccessibleInterface* caption() const override;
+    virtual QAccessibleInterface* cellAt(int row, int column) const override;
+    virtual int columnCount() const override;
+    virtual QString columnDescription(int column) const override;
+    virtual bool isColumnSelected(int column) const override;
+    virtual bool isRowSelected(int row) const override;
+    virtual void modelChange(QAccessibleTableModelChangeEvent* event) override;
+    virtual int rowCount() const override;
+    virtual QString rowDescription(int row) const override;
+    virtual bool selectColumn(int column) override;
+    virtual bool selectRow(int row) override;
+    virtual int selectedCellCount() const override;
+    virtual QList<QAccessibleInterface*> selectedCells() const override;
+    virtual int selectedColumnCount() const override;
+    virtual QList<int> selectedColumns() const override;
+    virtual int selectedRowCount() const override;
+    virtual QList<int> selectedRows() const override;
+    virtual QAccessibleInterface* summary() const override;
+    virtual bool unselectColumn(int column) override;
+    virtual bool unselectRow(int row) override;
+
+    // Factory
+    static QAccessibleInterface* customFactory(const QString& classname, QObject* object);
+
+private:
+    css::uno::Reference<css::accessibility::XAccessible> m_xAccessible;
+    css::uno::Reference<css::accessibility::XAccessibleContext> getAccessibleContextImpl() const;
+    QObject* m_pObject;
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/inc/qt5/Qt5Bitmap.hxx b/vcl/inc/qt5/Qt5Bitmap.hxx
new file mode 100644
index 000000000..8ff4297e4
--- /dev/null
+++ b/vcl/inc/qt5/Qt5Bitmap.hxx
@@ -0,0 +1,66 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <salbmp.hxx>
+
+#include <memory>
+
+class QImage;
+
+class Qt5Bitmap final : public SalBitmap
+{
+    std::unique_ptr<QImage> m_pImage;
+    BitmapPalette m_aPalette;
+
+    // for 4bit support
+    std::unique_ptr<sal_uInt8[]> m_pBuffer;
+    Size m_aSize;
+    sal_uInt32 m_nScanline;
+
+public:
+    Qt5Bitmap();
+    Qt5Bitmap(const QImage& rQImage);
+
+    const QImage* GetQImage() const { return m_pImage.get(); }
+
+    virtual bool Create(const Size& rSize, sal_uInt16 nBitCount,
+                        const BitmapPalette& rPal) override;
+    virtual bool Create(const SalBitmap& rSalBmp) override;
+    virtual bool Create(const SalBitmap& rSalBmp, SalGraphics* pGraphics) override;
+    virtual bool Create(const SalBitmap& rSalBmp, sal_uInt16 nNewBitCount) override;
+    virtual bool Create(const css::uno::Reference<css::rendering::XBitmapCanvas>& rBitmapCanvas,
+                        Size& rSize, bool bMask = false) override;
+    virtual void Destroy() final override;
+    virtual Size GetSize() const override;
+    virtual sal_uInt16 GetBitCount() const override;
+
+    virtual BitmapBuffer* AcquireBuffer(BitmapAccessMode nMode) override;
+    virtual void ReleaseBuffer(BitmapBuffer* pBuffer, BitmapAccessMode nMode) override;
+    virtual bool GetSystemData(BitmapSystemData& rData) override;
+
+    virtual bool ScalingSupported() const override;
+    virtual bool Scale(const double& rScaleX, const double& rScaleY,
+                       BmpScaleFlag nScaleFlag) override;
+    virtual bool Replace(const Color& rSearchColor, const Color& rReplaceColor,
+                         sal_uInt8 nTol) override;
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/inc/qt5/Qt5Clipboard.hxx b/vcl/inc/qt5/Qt5Clipboard.hxx
new file mode 100644
index 000000000..b99534f59
--- /dev/null
+++ b/vcl/inc/qt5/Qt5Clipboard.hxx
@@ -0,0 +1,97 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ */
+
+#pragma once
+
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/datatransfer/XTransferable.hpp>
+#include <com/sun/star/datatransfer/clipboard/XSystemClipboard.hpp>
+#include <com/sun/star/datatransfer/clipboard/XFlushableClipboard.hpp>
+#include <com/sun/star/datatransfer/clipboard/XClipboardOwner.hpp>
+#include <com/sun/star/datatransfer/clipboard/XClipboardListener.hpp>
+#include <cppuhelper/compbase.hxx>
+
+#include <QtGui/QClipboard>
+
+/**
+ * This implementation has two main functions, which handle the clipboard content:
+ * the XClipboard::setContent function and the QClipboard::change signal handler.
+ *
+ * The first just sets the respective clipboard to the expected content from LO,
+ * the latter will handle any reported changes.
+ **/
+class Qt5Clipboard final
+    : public QObject,
+      public cppu::WeakComponentImplHelper<css::datatransfer::clipboard::XSystemClipboard,
+                                           css::datatransfer::clipboard::XFlushableClipboard,
+                                           css::lang::XServiceInfo>
+{
+    Q_OBJECT
+
+    osl::Mutex m_aMutex;
+    const OUString m_aClipboardName;
+    const QClipboard::Mode m_aClipboardMode;
+    // has to be set, if LO changes the QClipboard itself, so it won't instantly lose
+    // ownership by it's self-triggered QClipboard::changed handler
+    bool m_bOwnClipboardChange;
+    // true, if LO really wants to give up clipboard ownership
+    bool m_bDoClear;
+
+    // if not empty, this holds the setContents provided XTransferable or a Qt5ClipboardTransferable
+    css::uno::Reference<css::datatransfer::XTransferable> m_aContents;
+    // the owner of the current contents, which must be informed on content change
+    css::uno::Reference<css::datatransfer::clipboard::XClipboardOwner> m_aOwner;
+    std::vector<css::uno::Reference<css::datatransfer::clipboard::XClipboardListener>> m_aListeners;
+
+    static bool isOwner(const QClipboard::Mode aMode);
+    static bool isSupported(const QClipboard::Mode aMode);
+
+    explicit Qt5Clipboard(const OUString& aModeString, const QClipboard::Mode aMode);
+
+private Q_SLOTS:
+    void handleChanged(QClipboard::Mode mode);
+    void handleClearClipboard();
+
+signals:
+    void clearClipboard();
+
+public:
+    // factory function to construct only valid Qt5Clipboard objects by name
+    static css::uno::Reference<css::uno::XInterface> create(const OUString& aModeString);
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService(const OUString& ServiceName) override;
+    virtual css::uno::Sequence<OUString> SAL_CALL getSupportedServiceNames() override;
+
+    // XClipboard
+    virtual css::uno::Reference<css::datatransfer::XTransferable> SAL_CALL getContents() override;
+    virtual void SAL_CALL setContents(
+        const css::uno::Reference<css::datatransfer::XTransferable>& xTrans,
+        const css::uno::Reference<css::datatransfer::clipboard::XClipboardOwner>& xClipboardOwner)
+        override;
+    virtual OUString SAL_CALL getName() override;
+
+    // XClipboardEx
+    virtual sal_Int8 SAL_CALL getRenderingCapabilities() override;
+
+    // XFlushableClipboard
+    virtual void SAL_CALL flushClipboard() override;
+
+    // XClipboardNotifier
+    virtual void SAL_CALL addClipboardListener(
+        const css::uno::Reference<css::datatransfer::clipboard::XClipboardListener>& listener)
+        override;
+    virtual void SAL_CALL removeClipboardListener(
+        const css::uno::Reference<css::datatransfer::clipboard::XClipboardListener>& listener)
+        override;
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/inc/qt5/Qt5Data.hxx b/vcl/inc/qt5/Qt5Data.hxx
new file mode 100644
index 000000000..1834835d3
--- /dev/null
+++ b/vcl/inc/qt5/Qt5Data.hxx
@@ -0,0 +1,47 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <unx/gendata.hxx>
+
+#include <o3tl/enumarray.hxx>
+#include <vcl/ptrstyle.hxx>
+#include <memory>
+#include <vclpluginapi.h>
+
+class QCursor;
+
+class VCLPLUG_QT5_PUBLIC Qt5Data final : public GenericUnixSalData
+{
+    o3tl::enumarray<PointerStyle, std::unique_ptr<QCursor>> m_aCursors;
+
+public:
+    explicit Qt5Data(SalInstance* pInstance);
+    virtual ~Qt5Data() override;
+
+    virtual void ErrorTrapPush() override;
+    virtual bool ErrorTrapPop(bool bIgnoreError = true) override;
+
+    QCursor& getCursor(PointerStyle ePointerStyle);
+
+    static bool noNativeControls();
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/inc/qt5/Qt5DragAndDrop.hxx b/vcl/inc/qt5/Qt5DragAndDrop.hxx
new file mode 100644
index 000000000..c88465ab3
--- /dev/null
+++ b/vcl/inc/qt5/Qt5DragAndDrop.hxx
@@ -0,0 +1,115 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ */
+
+#pragma once
+
+#include <com/sun/star/datatransfer/dnd/XDragSource.hpp>
+#include <com/sun/star/datatransfer/dnd/XDropTarget.hpp>
+#include <com/sun/star/lang/XInitialization.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <cppuhelper/compbase.hxx>
+
+class Qt5Frame;
+
+class Qt5DragSource final
+    : public cppu::WeakComponentImplHelper<css::datatransfer::dnd::XDragSource,
+                                           css::lang::XInitialization, css::lang::XServiceInfo>
+{
+    osl::Mutex m_aMutex;
+    Qt5Frame* m_pFrame;
+    css::uno::Reference<css::datatransfer::dnd::XDragSourceListener> m_xListener;
+
+public:
+    Qt5DragSource()
+        : WeakComponentImplHelper(m_aMutex)
+        , m_pFrame(nullptr)
+    {
+    }
+
+    virtual ~Qt5DragSource() override;
+
+    // XDragSource
+    virtual sal_Bool SAL_CALL isDragImageSupported() override;
+    virtual sal_Int32 SAL_CALL getDefaultCursor(sal_Int8 dragAction) override;
+    virtual void SAL_CALL startDrag(
+        const css::datatransfer::dnd::DragGestureEvent& trigger, sal_Int8 sourceActions,
+        sal_Int32 cursor, sal_Int32 image,
+        const css::uno::Reference<css::datatransfer::XTransferable>& transferable,
+        const css::uno::Reference<css::datatransfer::dnd::XDragSourceListener>& listener) override;
+
+    // XInitialization
+    virtual void SAL_CALL initialize(const css::uno::Sequence<css::uno::Any>& rArguments) override;
+    void deinitialize();
+
+    OUString SAL_CALL getImplementationName() override;
+
+    sal_Bool SAL_CALL supportsService(OUString const& ServiceName) override;
+
+    css::uno::Sequence<OUString> SAL_CALL getSupportedServiceNames() override;
+
+    void fire_dragEnd(sal_Int8 nAction, bool bSuccessful);
+};
+
+class Qt5DropTarget final
+    : public cppu::WeakComponentImplHelper<css::datatransfer::dnd::XDropTarget,
+                                           css::datatransfer::dnd::XDropTargetDragContext,
+                                           css::datatransfer::dnd::XDropTargetDropContext,
+                                           css::lang::XInitialization, css::lang::XServiceInfo>
+{
+    osl::Mutex m_aMutex;
+    Qt5Frame* m_pFrame;
+    sal_Int8 m_nDropAction;
+    bool m_bActive;
+    sal_Int8 m_nDefaultActions;
+    std::vector<css::uno::Reference<css::datatransfer::dnd::XDropTargetListener>> m_aListeners;
+    bool m_bDropSuccessful;
+
+public:
+    Qt5DropTarget();
+    virtual ~Qt5DropTarget() override;
+
+    // XInitialization
+    virtual void SAL_CALL initialize(const css::uno::Sequence<css::uno::Any>& rArgs) override;
+    void deinitialize();
+
+    // XDropTarget
+    virtual void SAL_CALL addDropTargetListener(
+        const css::uno::Reference<css::datatransfer::dnd::XDropTargetListener>&) override;
+    virtual void SAL_CALL removeDropTargetListener(
+        const css::uno::Reference<css::datatransfer::dnd::XDropTargetListener>&) override;
+    virtual sal_Bool SAL_CALL isActive() override;
+    virtual void SAL_CALL setActive(sal_Bool active) override;
+    virtual sal_Int8 SAL_CALL getDefaultActions() override;
+    virtual void SAL_CALL setDefaultActions(sal_Int8 actions) override;
+
+    // XDropTargetDragContext
+    virtual void SAL_CALL acceptDrag(sal_Int8 dragOperation) override;
+    virtual void SAL_CALL rejectDrag() override;
+
+    // XDropTargetDropContext
+    virtual void SAL_CALL acceptDrop(sal_Int8 dropOperation) override;
+    virtual void SAL_CALL rejectDrop() override;
+    virtual void SAL_CALL dropComplete(sal_Bool success) override;
+
+    // XServiceInfo
+    OUString SAL_CALL getImplementationName() override;
+    sal_Bool SAL_CALL supportsService(OUString const& ServiceName) override;
+    css::uno::Sequence<OUString> SAL_CALL getSupportedServiceNames() override;
+
+    void fire_dragEnter(const css::datatransfer::dnd::DropTargetDragEnterEvent& dtde);
+    void fire_dragExit(const css::datatransfer::dnd::DropTargetEvent& dte);
+    void fire_dragOver(const css::datatransfer::dnd::DropTargetDragEnterEvent& dtde);
+    void fire_drop(const css::datatransfer::dnd::DropTargetDropEvent& dtde);
+
+    sal_Int8 proposedDropAction() const { return m_nDropAction; }
+    bool dropSuccessful() const { return m_bDropSuccessful; }
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/inc/qt5/Qt5FilePicker.hxx b/vcl/inc/qt5/Qt5FilePicker.hxx
new file mode 100644
index 000000000..5fef2aaea
--- /dev/null
+++ b/vcl/inc/qt5/Qt5FilePicker.hxx
@@ -0,0 +1,175 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <vclpluginapi.h>
+
+#include <cppuhelper/compbase.hxx>
+
+#include <com/sun/star/frame/XTerminateListener.hpp>
+#include <com/sun/star/lang/XInitialization.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/ui/dialogs/XFilePicker3.hpp>
+#include <com/sun/star/ui/dialogs/XFilePickerControlAccess.hpp>
+#include <com/sun/star/ui/dialogs/XFolderPicker2.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+
+#include <osl/conditn.hxx>
+#include <osl/mutex.hxx>
+
+#include <QtCore/QObject>
+#include <QtCore/QString>
+#include <QtCore/QStringList>
+#include <QtCore/QHash>
+#include <QtWidgets/QFileDialog>
+
+#include <memory>
+
+class QComboBox;
+class QGridLayout;
+class QLabel;
+class QWidget;
+
+typedef ::cppu::WeakComponentImplHelper<css::frame::XTerminateListener, css::lang::XInitialization,
+                                        css::lang::XServiceInfo, css::ui::dialogs::XFilePicker3,
+                                        css::ui::dialogs::XFilePickerControlAccess,
+                                        css::ui::dialogs::XFolderPicker2>
+    Qt5FilePicker_Base;
+
+class VCLPLUG_QT5_PUBLIC Qt5FilePicker : public QObject, public Qt5FilePicker_Base
+{
+    Q_OBJECT
+
+private:
+    css::uno::Reference<css::uno::XComponentContext> m_context;
+
+    css::uno::Reference<css::ui::dialogs::XFilePickerListener> m_xListener;
+
+    osl::Mutex m_aHelperMutex; ///< mutex used by the WeakComponentImplHelper
+
+    QStringList m_aNamedFilterList; ///< to keep the original sequence
+    QHash<QString, QString> m_aTitleToFilterMap;
+    // to retrieve the filename extension for a given filter
+    QHash<QString, QString> m_aNamedFilterToExtensionMap;
+    QString m_aCurrentFilter;
+
+    QGridLayout* m_pLayout; ///< layout for extra custom controls
+    QHash<sal_Int16, QWidget*> m_aCustomWidgetsMap; ///< map of SAL control ID's to widget
+
+    const bool m_bIsFolderPicker;
+
+    QWidget* m_pParentWidget;
+
+protected:
+    std::unique_ptr<QFileDialog> m_pFileDialog; ///< the file picker dialog
+    QWidget* m_pExtraControls; ///< widget to contain extra custom controls
+
+public:
+    // use non-native file dialog by default; there's no easy way to add custom widgets
+    // in a generic way in the native one
+    explicit Qt5FilePicker(css::uno::Reference<css::uno::XComponentContext> const& context,
+                           QFileDialog::FileMode, bool bUseNative = false);
+    virtual ~Qt5FilePicker() override;
+
+    // XFilePickerNotifier
+    virtual void SAL_CALL addFilePickerListener(
+        const css::uno::Reference<css::ui::dialogs::XFilePickerListener>& xListener) override;
+    virtual void SAL_CALL removeFilePickerListener(
+        const css::uno::Reference<css::ui::dialogs::XFilePickerListener>& xListener) override;
+
+    // XFilterManager functions
+    virtual void SAL_CALL appendFilter(const OUString& rTitle, const OUString& rFilter) override;
+    virtual void SAL_CALL setCurrentFilter(const OUString& rTitle) override;
+    virtual OUString SAL_CALL getCurrentFilter() override;
+
+    // XFilterGroupManager functions
+    virtual void SAL_CALL
+    appendFilterGroup(const OUString& rGroupTitle,
+                      const css::uno::Sequence<css::beans::StringPair>& rFilters) override;
+
+    // XCancellable
+    virtual void SAL_CALL cancel() override;
+
+    // XExecutableDialog functions
+    virtual void SAL_CALL setTitle(const OUString& rTitle) override;
+    virtual sal_Int16 SAL_CALL execute() override;
+
+    // XFilePicker functions
+    virtual void SAL_CALL setMultiSelectionMode(sal_Bool bMode) override;
+    virtual void SAL_CALL setDefaultName(const OUString& rName) override;
+    virtual void SAL_CALL setDisplayDirectory(const OUString& rDirectory) override;
+    virtual OUString SAL_CALL getDisplayDirectory() override;
+    virtual css::uno::Sequence<OUString> SAL_CALL getFiles() override;
+
+    // XFilePickerControlAccess functions
+    virtual void SAL_CALL setValue(sal_Int16 nControlId, sal_Int16 nControlAction,
+                                   const css::uno::Any& rValue) override;
+    virtual css::uno::Any SAL_CALL getValue(sal_Int16 nControlId,
+                                            sal_Int16 nControlAction) override;
+    virtual void SAL_CALL enableControl(sal_Int16 nControlId, sal_Bool bEnable) override;
+    virtual void SAL_CALL setLabel(sal_Int16 nControlId, const OUString& rLabel) override;
+    virtual OUString SAL_CALL getLabel(sal_Int16 nControlId) override;
+
+    // XFilePicker2 functions
+    virtual css::uno::Sequence<OUString> SAL_CALL getSelectedFiles() override;
+
+    // XInitialization
+    virtual void SAL_CALL initialize(const css::uno::Sequence<css::uno::Any>& rArguments) override;
+
+    // XEventListener
+    void SAL_CALL disposing(const css::lang::EventObject& rEvent) override;
+    using cppu::WeakComponentImplHelperBase::disposing;
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService(const OUString& rServiceName) override;
+    virtual css::uno::Sequence<OUString> SAL_CALL getSupportedServiceNames() override;
+
+    // XFolderPicker functions
+    virtual OUString SAL_CALL getDirectory() override;
+    virtual void SAL_CALL setDescription(const OUString& rDescription) override;
+
+    // XTerminateListener
+    void SAL_CALL queryTermination(const css::lang::EventObject& aEvent) override;
+    void SAL_CALL notifyTermination(const css::lang::EventObject& aEvent) override;
+
+protected:
+    virtual void addCustomControl(sal_Int16 controlId);
+    void setCustomControlWidgetLayout(QGridLayout* pLayout) { m_pLayout = pLayout; }
+
+private:
+    Qt5FilePicker(const Qt5FilePicker&) = delete;
+    Qt5FilePicker& operator=(const Qt5FilePicker&) = delete;
+
+    static QString getResString(const char* pRedId);
+    static css::uno::Any handleGetListValue(const QComboBox* pWidget, sal_Int16 nControlAction);
+    static void handleSetListValue(QComboBox* pQComboBox, sal_Int16 nAction,
+                                   const css::uno::Any& rValue);
+
+private Q_SLOTS:
+    // emit XFilePickerListener controlStateChanged event
+    void filterSelected(const QString&);
+    // emit XFilePickerListener fileSelectionChanged event
+    void currentChanged(const QString&);
+    // (un)set automatic file extension
+    virtual void updateAutomaticFileExtension();
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/inc/qt5/Qt5Font.hxx b/vcl/inc/qt5/Qt5Font.hxx
new file mode 100644
index 000000000..0720be931
--- /dev/null
+++ b/vcl/inc/qt5/Qt5Font.hxx
@@ -0,0 +1,41 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <fontinstance.hxx>
+
+#include <QtGui/QFont>
+
+#include "Qt5FontFace.hxx"
+
+class Qt5Font final : public QFont, public LogicalFontInstance
+{
+    friend rtl::Reference<LogicalFontInstance>
+    Qt5FontFace::CreateFontInstance(const FontSelectPattern&) const;
+
+    bool GetGlyphOutline(sal_GlyphId, basegfx::B2DPolyPolygon&, bool) const override;
+    bool ImplGetGlyphBoundRect(sal_GlyphId, tools::Rectangle&, bool) const override;
+
+    virtual hb_font_t* ImplInitHbFont() override;
+
+    explicit Qt5Font(const PhysicalFontFace&, const FontSelectPattern&);
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/inc/qt5/Qt5FontFace.hxx b/vcl/inc/qt5/Qt5FontFace.hxx
new file mode 100644
index 000000000..585f4aaa8
--- /dev/null
+++ b/vcl/inc/qt5/Qt5FontFace.hxx
@@ -0,0 +1,67 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <vclpluginapi.h>
+#include <PhysicalFontFace.hxx>
+
+#include <tools/ref.hxx>
+#include <vcl/fontcapabilities.hxx>
+#include <vcl/fontcharmap.hxx>
+
+#include <QtCore/QString>
+#include <QtGui/QFont>
+
+class FontAttributes;
+class FontSelectPattern;
+
+class Qt5FontFace final : public PhysicalFontFace
+{
+public:
+    static Qt5FontFace* fromQFont(const QFont& rFont);
+    static Qt5FontFace* fromQFontDatabase(const QString& aFamily, const QString& aStyle);
+    static void fillAttributesFromQFont(const QFont& rFont, FontAttributes& rFA);
+
+    VCLPLUG_QT5_PUBLIC static FontWeight toFontWeight(const int nWeight);
+    VCLPLUG_QT5_PUBLIC static FontWidth toFontWidth(const int nStretch);
+    VCLPLUG_QT5_PUBLIC static FontItalic toFontItalic(const QFont::Style eStyle);
+
+    sal_IntPtr GetFontId() const override;
+
+    int GetFontTable(const char pTagName[5], unsigned char*) const;
+
+    const FontCharMapRef& GetFontCharMap() const;
+    bool GetFontCapabilities(vcl::FontCapabilities& rFontCapabilities) const;
+    bool HasChar(sal_uInt32 cChar) const;
+
+    rtl::Reference<LogicalFontInstance>
+    CreateFontInstance(const FontSelectPattern& rFSD) const override;
+
+private:
+    Qt5FontFace(const Qt5FontFace&);
+    Qt5FontFace(const FontAttributes& rFA, const QString& rFontID);
+
+    const QString m_aFontId;
+    mutable FontCharMapRef m_xCharMap;
+    mutable vcl::FontCapabilities m_aFontCapabilities;
+    mutable bool m_bFontCapabilitiesRead;
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/inc/qt5/Qt5Frame.hxx b/vcl/inc/qt5/Qt5Frame.hxx
new file mode 100644
index 000000000..0caf1bc3e
--- /dev/null
+++ b/vcl/inc/qt5/Qt5Frame.hxx
@@ -0,0 +1,225 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <config_vclplug.h>
+
+#include <salframe.hxx>
+#include <vclpluginapi.h>
+
+#include "Qt5Tools.hxx"
+
+#include <headless/svpgdi.hxx>
+#include <vcl/svapp.hxx>
+#include <vcl/sysdata.hxx>
+
+#include <QtCore/QObject>
+
+#if QT5_USING_X11
+#include <unx/screensaverinhibitor.hxx>
+// any better way to get rid of the X11 / Qt type clashes?
+#undef Bool
+#undef CursorShape
+#undef Expose
+#undef KeyPress
+#undef KeyRelease
+#undef FocusIn
+#undef FocusOut
+#undef FontChange
+#undef None
+#undef Status
+#undef Unsorted
+#endif
+
+class Qt5DragSource;
+class Qt5DropTarget;
+class Qt5Graphics;
+class Qt5Instance;
+class Qt5MainWindow;
+class Qt5Menu;
+class Qt5SvpGraphics;
+
+class QDragMoveEvent;
+class QDropEvent;
+class QImage;
+class QMimeData;
+class QPaintDevice;
+class QScreen;
+class QWidget;
+
+class VCLPLUG_QT5_PUBLIC Qt5Frame : public QObject, public SalFrame
+{
+    Q_OBJECT
+
+    friend class Qt5Widget;
+
+    QWidget* m_pQWidget;
+    Qt5MainWindow* m_pTopLevel;
+
+    const bool m_bUseCairo;
+    std::unique_ptr<QImage> m_pQImage;
+    std::unique_ptr<Qt5Graphics> m_pQt5Graphics;
+    UniqueCairoSurface m_pSurface;
+    std::unique_ptr<Qt5SvpGraphics> m_pOurSvpGraphics;
+    // in base class, this ptr is the same as m_pOurSvpGraphic
+    // in derived class, it can point to a derivative
+    // of Qt5SvpGraphics (which the derived class then owns)
+    Qt5SvpGraphics* m_pSvpGraphics;
+    DamageHandler m_aDamageHandler;
+    QRegion m_aRegion;
+    bool m_bNullRegion;
+
+    bool m_bGraphicsInUse;
+    bool m_bGraphicsInvalid;
+    SalFrameStyleFlags m_nStyle;
+    Qt5Frame* m_pParent;
+    PointerStyle m_ePointerStyle;
+
+    SystemEnvData m_aSystemData;
+
+    Qt5Menu* m_pSalMenu;
+
+    Qt5DragSource* m_pDragSource;
+    Qt5DropTarget* m_pDropTarget;
+    bool m_bInDrag;
+
+    bool m_bDefaultSize;
+    bool m_bDefaultPos;
+    bool m_bFullScreen;
+    bool m_bFullScreenSpanAll;
+    sal_uInt32 m_nRestoreScreen;
+    QRect m_aRestoreGeometry;
+
+#if QT5_USING_X11
+    ScreenSaverInhibitor m_ScreenSaverInhibitor;
+#endif
+
+    void SetDefaultPos();
+    Size CalcDefaultSize();
+    void SetDefaultSize();
+
+    bool isChild(bool bPlug = true, bool bSysChild = true) const
+    {
+        SalFrameStyleFlags nMask = SalFrameStyleFlags::NONE;
+        if (bPlug)
+            nMask |= SalFrameStyleFlags::PLUG;
+        if (bSysChild)
+            nMask |= SalFrameStyleFlags::SYSTEMCHILD;
+        return bool(m_nStyle & nMask);
+    }
+
+    bool isWindow() const;
+    QWindow* windowHandle() const;
+    QScreen* screen() const;
+    bool isMinimized() const;
+    bool isMaximized() const;
+    void SetWindowStateImpl(Qt::WindowStates eState);
+
+    void fixICCCMwindowGroup();
+
+public:
+    Qt5Frame(Qt5Frame* pParent, SalFrameStyleFlags nSalFrameStyle, bool bUseCairo);
+    virtual ~Qt5Frame() override;
+
+    QWidget* GetQWidget() const { return m_pQWidget; }
+    Qt5MainWindow* GetTopLevelWindow() const { return m_pTopLevel; }
+    QWidget* asChild() const;
+    qreal devicePixelRatioF() const;
+
+    void Damage(sal_Int32 nExtentsX, sal_Int32 nExtentsY, sal_Int32 nExtentsWidth,
+                sal_Int32 nExtentsHeight) const;
+
+    void InitQt5SvpGraphics(Qt5SvpGraphics* pQt5SvpGraphics);
+    virtual SalGraphics* AcquireGraphics() override;
+    virtual void ReleaseGraphics(SalGraphics* pGraphics) override;
+
+    virtual bool PostEvent(std::unique_ptr<ImplSVEvent> pData) override;
+
+    virtual void SetTitle(const OUString& rTitle) override;
+    virtual void SetIcon(sal_uInt16 nIcon) override;
+    virtual void SetMenu(SalMenu* pMenu) override;
+    virtual void DrawMenuBar() override;
+
+    virtual void registerDragSource(Qt5DragSource* pDragSource);
+    virtual void deregisterDragSource(Qt5DragSource const* pDragSource);
+    virtual void registerDropTarget(Qt5DropTarget* pDropTarget);
+    virtual void deregisterDropTarget(Qt5DropTarget const* pDropTarget);
+
+    void handleDragLeave();
+    void handleDragMove(QDragMoveEvent* pEvent);
+    void handleDrop(QDropEvent* pEvent);
+
+    virtual void SetExtendedFrameStyle(SalExtStyle nExtStyle) override;
+    virtual void Show(bool bVisible, bool bNoActivate = false) override;
+    virtual void SetMinClientSize(long nWidth, long nHeight) override;
+    virtual void SetMaxClientSize(long nWidth, long nHeight) override;
+    virtual void SetPosSize(long nX, long nY, long nWidth, long nHeight,
+                            sal_uInt16 nFlags) override;
+    virtual void GetClientSize(long& rWidth, long& rHeight) override;
+    virtual void GetWorkArea(tools::Rectangle& rRect) override;
+    virtual SalFrame* GetParent() const override;
+    virtual void SetModal(bool bModal) override;
+    virtual bool GetModal() const override;
+    virtual void SetWindowState(const SalFrameState* pState) override;
+    virtual bool GetWindowState(SalFrameState* pState) override;
+    virtual void ShowFullScreen(bool bFullScreen, sal_Int32 nDisplay) override;
+    virtual void StartPresentation(bool bStart) override;
+    virtual void SetAlwaysOnTop(bool bOnTop) override;
+    virtual void ToTop(SalFrameToTop nFlags) override;
+    virtual void SetPointer(PointerStyle ePointerStyle) override;
+    virtual void CaptureMouse(bool bMouse) override;
+    virtual void SetPointerPos(long nX, long nY) override;
+    virtual bool ShowTooltip(const OUString& rText, const tools::Rectangle& rHelpArea) override;
+    using SalFrame::Flush;
+    virtual void Flush() override;
+    virtual void SetInputContext(SalInputContext* pContext) override;
+    virtual void EndExtTextInput(EndExtTextInputFlags nFlags) override;
+    virtual OUString GetKeyName(sal_uInt16 nKeyCode) override;
+    virtual bool MapUnicodeToKeyCode(sal_Unicode aUnicode, LanguageType aLangType,
+                                     vcl::KeyCode& rKeyCode) override;
+    virtual LanguageType GetInputLanguage() override;
+    virtual void UpdateSettings(AllSettings& rSettings) override;
+    virtual void Beep() override;
+    virtual const SystemEnvData* GetSystemData() const override { return &m_aSystemData; }
+    virtual SalPointerState GetPointerState() override;
+    virtual KeyIndicatorState GetIndicatorState() override;
+    virtual void SimulateKeyPress(sal_uInt16 nKeyCode) override;
+    virtual void SetParent(SalFrame* pNewParent) override;
+    virtual bool SetPluginParent(SystemParentData* pNewParent) override;
+    virtual void ResetClipRegion() override;
+    virtual void BeginSetClipRegion(sal_uInt32 nRects) override;
+    virtual void UnionClipRegion(long nX, long nY, long nWidth, long nHeight) override;
+    virtual void EndSetClipRegion() override;
+
+    virtual void SetScreenNumber(unsigned int) override;
+    virtual void SetApplicationID(const OUString&) override;
+
+    inline bool CallCallback(SalEvent nEvent, const void* pEvent) const;
+
+    cairo_t* getCairoContext() const;
+};
+
+inline bool Qt5Frame::CallCallback(SalEvent nEvent, const void* pEvent) const
+{
+    SolarMutexGuard aGuard;
+    return SalFrame::CallCallback(nEvent, pEvent);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/inc/qt5/Qt5Graphics.hxx b/vcl/inc/qt5/Qt5Graphics.hxx
new file mode 100644
index 000000000..bc4870ee7
--- /dev/null
+++ b/vcl/inc/qt5/Qt5Graphics.hxx
@@ -0,0 +1,202 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <salgdi.hxx>
+
+#include <memory>
+
+#include <QtGui/QPainter>
+#include <QtGui/QPainterPath>
+#include <QtGui/QRegion>
+
+#include "Qt5GraphicsBase.hxx"
+
+class PhysicalFontCollection;
+class QImage;
+class QPushButton;
+class Qt5Font;
+class Qt5FontFace;
+class Qt5Frame;
+class Qt5Painter;
+
+class Qt5Graphics final : public SalGraphics, public Qt5GraphicsBase
+{
+    friend class Qt5Bitmap;
+    friend class Qt5Painter;
+
+    Qt5Frame* m_pFrame;
+    QImage* m_pQImage;
+    QRegion m_aClipRegion;
+    QPainterPath m_aClipPath;
+    Color m_aLineColor;
+    Color m_aFillColor;
+    QPainter::CompositionMode m_eCompositionMode;
+
+    PhysicalFontCollection* m_pFontCollection;
+    rtl::Reference<Qt5Font> m_pTextStyle[MAX_FALLBACK];
+    Color m_aTextColor;
+    std::unique_ptr<QPushButton> m_focusedButton;
+    std::unique_ptr<QImage> m_image;
+    QRect m_lastPopupRect;
+
+    Qt5Graphics(Qt5Frame* pFrame, QImage* pQImage);
+
+    void drawScaledImage(const SalTwoRect& rPosAry, const QImage& rImage);
+
+    void handleDamage(const tools::Rectangle&) override;
+
+public:
+    Qt5Graphics(Qt5Frame* pFrame)
+        : Qt5Graphics(pFrame, nullptr)
+    {
+    }
+    Qt5Graphics(QImage* pQImage)
+        : Qt5Graphics(nullptr, pQImage)
+    {
+    }
+    virtual ~Qt5Graphics() override;
+
+    void ChangeQImage(QImage* pImage);
+
+    virtual SalGraphicsImpl* GetImpl() const override;
+    virtual SystemGraphicsData GetGraphicsData() const override;
+    virtual bool supportsOperation(OutDevSupportType) const override;
+    virtual OUString getRenderBackendName() const override { return "qt5"; }
+
+#if ENABLE_CAIRO_CANVAS
+    virtual bool SupportsCairo() const override;
+    virtual cairo::SurfaceSharedPtr
+    CreateSurface(const cairo::CairoSurfaceSharedPtr& rSurface) const override;
+    virtual cairo::SurfaceSharedPtr CreateSurface(const OutputDevice& rRefDevice, int x, int y,
+                                                  int width, int height) const override;
+    virtual cairo::SurfaceSharedPtr CreateBitmapSurface(const OutputDevice& rRefDevice,
+                                                        const BitmapSystemData& rData,
+                                                        const Size& rSize) const override;
+    virtual css::uno::Any GetNativeSurfaceHandle(cairo::SurfaceSharedPtr& rSurface,
+                                                 const basegfx::B2ISize& rSize) const override;
+    virtual SystemFontData GetSysFontData(int nFallbacklevel) const override;
+#endif // ENABLE_CAIRO_CANVAS
+
+    // GDI
+
+    virtual bool setClipRegion(const vcl::Region&) override;
+    virtual void ResetClipRegion() override;
+
+    virtual void drawPixel(long nX, long nY) override;
+    virtual void drawPixel(long nX, long nY, Color nColor) override;
+    virtual void drawLine(long nX1, long nY1, long nX2, long nY2) override;
+    virtual void drawRect(long nX, long nY, long nWidth, long nHeight) override;
+    virtual void drawPolyLine(sal_uInt32 nPoints, const SalPoint* pPtAry) override;
+    virtual void drawPolygon(sal_uInt32 nPoints, const SalPoint* pPtAry) override;
+    virtual void drawPolyPolygon(sal_uInt32 nPoly, const sal_uInt32* pPoints,
+                                 PCONSTSALPOINT* pPtAry) override;
+    virtual bool drawPolyPolygon(const basegfx::B2DHomMatrix& rObjectToDevice,
+                                 const basegfx::B2DPolyPolygon&, double fTransparency) override;
+    virtual bool drawPolyLineBezier(sal_uInt32 nPoints, const SalPoint* pPtAry,
+                                    const PolyFlags* pFlgAry) override;
+    virtual bool drawPolygonBezier(sal_uInt32 nPoints, const SalPoint* pPtAry,
+                                   const PolyFlags* pFlgAry) override;
+    virtual bool drawPolyPolygonBezier(sal_uInt32 nPoly, const sal_uInt32* pPoints,
+                                       const SalPoint* const* pPtAry,
+                                       const PolyFlags* const* pFlgAry) override;
+    virtual bool drawPolyLine(const basegfx::B2DHomMatrix& rObjectToDevice,
+                              const basegfx::B2DPolygon&, double fTransparency, double fLineWidths,
+                              const std::vector<double>* pStroke, // MM01
+                              basegfx::B2DLineJoin, css::drawing::LineCap eLineCap,
+                              double fMiterMinimumAngle, bool bPixelSnapHairline) override;
+    virtual bool drawGradient(const tools::PolyPolygon&, const Gradient&) override;
+
+    virtual void copyArea(long nDestX, long nDestY, long nSrcX, long nSrcY, long nSrcWidth,
+                          long nSrcHeight, bool bWindowInvalidate) override;
+
+    virtual void copyBits(const SalTwoRect& rPosAry, SalGraphics* pSrcGraphics) override;
+    virtual void drawBitmap(const SalTwoRect& rPosAry, const SalBitmap& rSalBitmap) override;
+    virtual void drawBitmap(const SalTwoRect& rPosAry, const SalBitmap& rSalBitmap,
+                            const SalBitmap& rTransparentBitmap) override;
+    virtual void drawMask(const SalTwoRect& rPosAry, const SalBitmap& rSalBitmap,
+                          Color nMaskColor) override;
+
+    virtual std::shared_ptr<SalBitmap> getBitmap(long nX, long nY, long nWidth,
+                                                 long nHeight) override;
+    virtual Color getPixel(long nX, long nY) override;
+
+    virtual void invert(long nX, long nY, long nWidth, long nHeight, SalInvert nFlags) override;
+    virtual void invert(sal_uInt32 nPoints, const SalPoint* pPtAry, SalInvert nFlags) override;
+
+    virtual bool drawEPS(long nX, long nY, long nWidth, long nHeight, void* pPtr,
+                         sal_uInt32 nSize) override;
+
+    virtual bool blendBitmap(const SalTwoRect&, const SalBitmap& rBitmap) override;
+
+    virtual bool blendAlphaBitmap(const SalTwoRect&, const SalBitmap& rSrcBitmap,
+                                  const SalBitmap& rMaskBitmap,
+                                  const SalBitmap& rAlphaBitmap) override;
+
+    virtual bool drawAlphaBitmap(const SalTwoRect&, const SalBitmap& rSourceBitmap,
+                                 const SalBitmap& rAlphaBitmap) override;
+
+    bool drawTransformedBitmap(const basegfx::B2DPoint& rNull, const basegfx::B2DPoint& rX,
+                               const basegfx::B2DPoint& rY, const SalBitmap& rSourceBitmap,
+                               const SalBitmap* pAlphaBitmap) override;
+
+    virtual bool drawAlphaRect(long nX, long nY, long nWidth, long nHeight,
+                               sal_uInt8 nTransparency) override;
+
+    virtual void GetResolution(sal_Int32& rDPIX, sal_Int32& rDPIY) override;
+    virtual sal_uInt16 GetBitCount() const override;
+    virtual long GetGraphicsWidth() const override;
+
+    virtual void SetLineColor() override;
+    virtual void SetLineColor(Color nColor) override;
+    virtual void SetFillColor() override;
+    virtual void SetFillColor(Color nColor) override;
+    virtual void SetXORMode(bool bSet, bool bInvertOnly) override;
+    virtual void SetROPLineColor(SalROPColor nROPColor) override;
+    virtual void SetROPFillColor(SalROPColor nROPColor) override;
+
+    // Text rendering + font support
+
+    virtual void SetTextColor(Color nColor) override;
+    virtual void SetFont(LogicalFontInstance*, int nFallbackLevel) override;
+    virtual void GetFontMetric(ImplFontMetricDataRef&, int nFallbackLevel) override;
+    virtual FontCharMapRef GetFontCharMap() const override;
+    virtual bool GetFontCapabilities(vcl::FontCapabilities& rFontCapabilities) const override;
+    virtual void GetDevFontList(PhysicalFontCollection*) override;
+    virtual void ClearDevFontCache() override;
+    virtual bool AddTempDevFont(PhysicalFontCollection*, const OUString& rFileURL,
+                                const OUString& rFontName) override;
+    virtual bool CreateFontSubset(const OUString& rToFile, const PhysicalFontFace* pFont,
+                                  const sal_GlyphId* pGlyphIds, const sal_uInt8* pEncoding,
+                                  sal_Int32* pWidths, int nGlyphs,
+                                  FontSubsetInfo& rInfo // out parameter
+                                  ) override;
+
+    virtual const void* GetEmbedFontData(const PhysicalFontFace*, long* pDataLen) override;
+    virtual void FreeEmbedFontData(const void* pData, long nDataLen) override;
+
+    virtual void GetGlyphWidths(const PhysicalFontFace*, bool bVertical,
+                                std::vector<sal_Int32>& rWidths, Ucs2UIntMap& rUnicodeEnc) override;
+
+    virtual std::unique_ptr<GenericSalLayout> GetTextLayout(int nFallbackLevel) override;
+    virtual void DrawTextLayout(const GenericSalLayout&) override;
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/inc/qt5/Qt5GraphicsBase.hxx b/vcl/inc/qt5/Qt5GraphicsBase.hxx
new file mode 100644
index 000000000..ef7955186
--- /dev/null
+++ b/vcl/inc/qt5/Qt5GraphicsBase.hxx
@@ -0,0 +1,30 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+#include <QtWidgets/QApplication>
+
+class Qt5GraphicsBase
+{
+    qreal m_fDPR;
+
+protected:
+    Qt5GraphicsBase()
+        : m_fDPR(qApp ? qApp->devicePixelRatio() : 1.0)
+    {
+    }
+
+    void setDevicePixelRatioF(qreal fDPR) { m_fDPR = fDPR; }
+
+public:
+    qreal devicePixelRatioF() const { return m_fDPR; }
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/inc/qt5/Qt5Graphics_Controls.hxx b/vcl/inc/qt5/Qt5Graphics_Controls.hxx
new file mode 100644
index 000000000..325e5c351
--- /dev/null
+++ b/vcl/inc/qt5/Qt5Graphics_Controls.hxx
@@ -0,0 +1,97 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <vclpluginapi.h>
+#include <WidgetDrawInterface.hxx>
+
+#include <memory>
+
+#include <QtGui/QImage>
+#include <QtGui/QPainter>
+#include <QtGui/QRegion>
+#include <QtWidgets/QPushButton>
+#include <QtWidgets/QStyle>
+#include <QtWidgets/QStyleOption>
+
+class Qt5GraphicsBase;
+
+class Qt5Graphics_Controls final : public vcl::WidgetDrawInterface
+{
+    std::unique_ptr<QImage> m_image;
+    QRect m_lastPopupRect;
+    Qt5GraphicsBase const& m_rGraphics;
+
+public:
+    Qt5Graphics_Controls(const Qt5GraphicsBase& rGraphics);
+
+    QImage* getImage() { return m_image.get(); }
+
+    bool isNativeControlSupported(ControlType nType, ControlPart nPart) override;
+    bool hitTestNativeControl(ControlType nType, ControlPart nPart,
+                              const tools::Rectangle& rControlRegion, const Point& aPos,
+                              bool& rIsInside) override;
+    bool drawNativeControl(ControlType nType, ControlPart nPart,
+                           const tools::Rectangle& rControlRegion, ControlState nState,
+                           const ImplControlValue& aValue, const OUString& aCaption,
+                           const Color& rBackgroundColor) override;
+    bool getNativeControlRegion(ControlType nType, ControlPart nPart,
+                                const tools::Rectangle& rControlRegion, ControlState nState,
+                                const ImplControlValue& aValue, const OUString& aCaption,
+                                tools::Rectangle& rNativeBoundingRegion,
+                                tools::Rectangle& rNativeContentRegion) override;
+
+private:
+    static int pixelMetric(QStyle::PixelMetric metric, const QStyleOption* option = nullptr);
+    static QSize sizeFromContents(QStyle::ContentsType type, const QStyleOption* option,
+                                  const QSize& contentsSize);
+    static QRect subControlRect(QStyle::ComplexControl control, const QStyleOptionComplex* option,
+                                QStyle::SubControl subControl);
+    static QRect subElementRect(QStyle::SubElement element, const QStyleOption* option);
+
+    void draw(QStyle::ControlElement element, QStyleOption* option, QImage* image,
+              QStyle::State const state = QStyle::State_None, QRect rect = QRect());
+    void draw(QStyle::PrimitiveElement element, QStyleOption* option, QImage* image,
+              QStyle::State const state = QStyle::State_None, QRect rect = QRect());
+    void draw(QStyle::ComplexControl element, QStyleOptionComplex* option, QImage* image,
+              QStyle::State const state = QStyle::State_None);
+    void drawFrame(QStyle::PrimitiveElement element, QImage* image, QStyle::State const& state,
+                   bool bClip = true,
+                   QStyle::PixelMetric eLineMetric = QStyle::PM_DefaultFrameWidth);
+
+    static void fillQStyleOptionTab(const ImplControlValue& value, QStyleOptionTab& sot);
+    void fullQStyleOptionTabWidgetFrame(QStyleOptionTabWidgetFrame& option, bool bDownscale);
+
+    enum class Round
+    {
+        Floor,
+        Ceil,
+    };
+
+    int downscale(int value, Round eRound);
+    int upscale(int value, Round eRound);
+    QRect downscale(const QRect& rect);
+    QRect upscale(const QRect& rect);
+    QSize downscale(const QSize& size, Round eRound);
+    QSize upscale(const QSize& size, Round eRound);
+    QPoint upscale(const QPoint& point, Round eRound);
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/inc/qt5/Qt5Instance.hxx b/vcl/inc/qt5/Qt5Instance.hxx
new file mode 100644
index 000000000..361eca0fc
--- /dev/null
+++ b/vcl/inc/qt5/Qt5Instance.hxx
@@ -0,0 +1,161 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <vclpluginapi.h>
+#include <unx/geninst.h>
+#include <salusereventlist.hxx>
+#include <vcl/timer.hxx>
+
+#include <osl/conditn.hxx>
+
+#include <QtCore/QObject>
+
+#include <cstdlib>
+#include <functional>
+#include <memory>
+#include <vector>
+
+#include "Qt5FilePicker.hxx"
+
+class QApplication;
+class SalYieldMutex;
+class SalFrame;
+
+struct StdFreeCStr
+{
+    void operator()(char* arg) const noexcept { std::free(arg); }
+};
+using FreeableCStr = std::unique_ptr<char[], StdFreeCStr>;
+
+class VCLPLUG_QT5_PUBLIC Qt5Instance : public QObject,
+                                       public SalGenericInstance,
+                                       public SalUserEventList
+{
+    Q_OBJECT
+
+    osl::Condition m_aWaitingYieldCond;
+    int m_postUserEventId;
+    const bool m_bUseCairo;
+    std::unordered_map<OUString, css::uno::Reference<css::uno::XInterface>> m_aClipboards;
+
+    std::unique_ptr<QApplication> m_pQApplication;
+    std::vector<FreeableCStr> m_pFakeArgvFreeable;
+    std::unique_ptr<char* []> m_pFakeArgv;
+    std::unique_ptr<int> m_pFakeArgc;
+
+    Timer m_aUpdateStyleTimer;
+    bool m_bUpdateFonts;
+
+    DECL_LINK(updateStyleHdl, Timer*, void);
+    void AfterAppInit() override;
+
+private Q_SLOTS:
+    bool ImplYield(bool bWait, bool bHandleAllCurrentEvents);
+    void ImplRunInMain();
+    static void deleteObjectLater(QObject* pObject);
+
+Q_SIGNALS:
+    bool ImplYieldSignal(bool bWait, bool bHandleAllCurrentEvents);
+    void ImplRunInMainSignal();
+    void deleteObjectLaterSignal(QObject* pObject);
+
+protected:
+    virtual Qt5FilePicker*
+    createPicker(css::uno::Reference<css::uno::XComponentContext> const& context,
+                 QFileDialog::FileMode);
+
+public:
+    explicit Qt5Instance(std::unique_ptr<QApplication>& pQApp, bool bUseCairo = false);
+    virtual ~Qt5Instance() override;
+
+    // handle common SalInstance setup
+    static void AllocFakeCmdlineArgs(std::unique_ptr<char* []>& rFakeArgv,
+                                     std::unique_ptr<int>& rFakeArgc,
+                                     std::vector<FreeableCStr>& rFakeArgvFreeable);
+    void MoveFakeCmdlineArgs(std::unique_ptr<char* []>& rFakeArgv, std::unique_ptr<int>& rFakeArgc,
+                             std::vector<FreeableCStr>& rFakeArgvFreeable);
+    static std::unique_ptr<QApplication> CreateQApplication(int& nArgc, char** pArgv);
+
+    void RunInMainThread(std::function<void()> func);
+
+    virtual SalFrame* CreateFrame(SalFrame* pParent, SalFrameStyleFlags nStyle) override;
+    virtual SalFrame* CreateChildFrame(SystemParentData* pParent,
+                                       SalFrameStyleFlags nStyle) override;
+    virtual void DestroyFrame(SalFrame* pFrame) override;
+
+    virtual SalObject* CreateObject(SalFrame* pParent, SystemWindowData* pWindowData,
+                                    bool bShow) override;
+    virtual void DestroyObject(SalObject* pObject) override;
+
+    virtual std::unique_ptr<SalVirtualDevice>
+    CreateVirtualDevice(SalGraphics* pGraphics, long& nDX, long& nDY, DeviceFormat eFormat,
+                        const SystemGraphicsData* pData = nullptr) override;
+
+    virtual SalInfoPrinter* CreateInfoPrinter(SalPrinterQueueInfo* pQueueInfo,
+                                              ImplJobSetup* pSetupData) override;
+    virtual void DestroyInfoPrinter(SalInfoPrinter* pPrinter) override;
+    virtual std::unique_ptr<SalPrinter> CreatePrinter(SalInfoPrinter* pInfoPrinter) override;
+    virtual void GetPrinterQueueInfo(ImplPrnQueueList* pList) override;
+    virtual void GetPrinterQueueState(SalPrinterQueueInfo* pInfo) override;
+    virtual OUString GetDefaultPrinter() override;
+    virtual void PostPrintersChanged() override;
+
+    virtual std::unique_ptr<SalMenu> CreateMenu(bool, Menu*) override;
+    virtual std::unique_ptr<SalMenuItem> CreateMenuItem(const SalItemParams&) override;
+
+    virtual SalTimer* CreateSalTimer() override;
+    virtual SalSystem* CreateSalSystem() override;
+    virtual std::shared_ptr<SalBitmap> CreateSalBitmap() override;
+
+    virtual bool DoYield(bool bWait, bool bHandleAllCurrentEvents) override;
+    virtual bool AnyInput(VclInputFlags nType) override;
+
+    virtual OpenGLContext* CreateOpenGLContext() override;
+
+    virtual OUString GetConnectionIdentifier() override;
+
+    virtual void AddToRecentDocumentList(const OUString& rFileUrl, const OUString& rMimeType,
+                                         const OUString& rDocumentService) override;
+
+    virtual std::unique_ptr<GenPspGraphics> CreatePrintGraphics() override;
+
+    virtual bool IsMainThread() const override;
+
+    virtual void TriggerUserEventProcessing() override;
+    virtual void ProcessEvent(SalUserEvent aEvent) override;
+
+    bool hasNativeFileSelection() const override { return true; }
+    css::uno::Reference<css::ui::dialogs::XFilePicker2>
+    createFilePicker(const css::uno::Reference<css::uno::XComponentContext>&) override;
+    css::uno::Reference<css::ui::dialogs::XFolderPicker2>
+    createFolderPicker(const css::uno::Reference<css::uno::XComponentContext>&) override;
+
+    virtual css::uno::Reference<css::uno::XInterface>
+    CreateClipboard(const css::uno::Sequence<css::uno::Any>& i_rArguments) override;
+    virtual css::uno::Reference<css::uno::XInterface> CreateDragSource() override;
+    virtual css::uno::Reference<css::uno::XInterface> CreateDropTarget() override;
+
+    void UpdateStyle(bool bFontsChanged);
+
+    void* CreateGStreamerSink(const SystemChildWindow*) override;
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/inc/qt5/Qt5MainWindow.hxx b/vcl/inc/qt5/Qt5MainWindow.hxx
new file mode 100644
index 000000000..f1e91b489
--- /dev/null
+++ b/vcl/inc/qt5/Qt5MainWindow.hxx
@@ -0,0 +1,40 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <QtWidgets/QWidget>
+#include <QtWidgets/QMainWindow>
+
+#include "Qt5Frame.hxx"
+
+class Qt5MainWindow : public QMainWindow
+{
+    Q_OBJECT
+
+    Qt5Frame& m_rFrame;
+
+    virtual void closeEvent(QCloseEvent* pEvent) override;
+    void moveEvent(QMoveEvent*) override;
+
+public:
+    Qt5MainWindow(Qt5Frame& rFrame, Qt::WindowFlags f = Qt::WindowFlags());
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/inc/qt5/Qt5Menu.hxx b/vcl/inc/qt5/Qt5Menu.hxx
new file mode 100644
index 000000000..2e5434f4d
--- /dev/null
+++ b/vcl/inc/qt5/Qt5Menu.hxx
@@ -0,0 +1,122 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+#include <salmenu.hxx>
+
+#include <QtCore/QObject>
+
+#include <memory>
+
+class MenuItemList;
+class QAction;
+class QActionGroup;
+class QPushButton;
+class QMenu;
+class QMenuBar;
+class Qt5MenuItem;
+class Qt5Frame;
+
+/*
+ * Qt5Menu can represent
+ * (1) the top-level menu of a menubar, in which case 'mbMenuBar' is true and
+ *     'mpQMenuBar' refers to the corresponding QMenuBar
+ * (2) another kind of menu (like a PopupMenu), in which case the corresponding QMenu
+ *     object is instantiated and owned by this Qt5Menu (held in 'mpOwnedQMenu').
+ * (3) a "submenu" in an existing menu (like (1)), in which case the corresponding
+ *     QMenu object is owned by the corresponding Qt5MenuItem.
+ *
+ * For (2) and (3), member 'mpQMenu' points to the corresponding QMenu object.
+ */
+class Qt5Menu : public QObject, public SalMenu
+{
+    Q_OBJECT
+private:
+    std::vector<Qt5MenuItem*> maItems;
+    VclPtr<Menu> mpVCLMenu;
+    Qt5Menu* mpParentSalMenu;
+    Qt5Frame* mpFrame;
+    bool mbMenuBar;
+    QMenuBar* mpQMenuBar;
+    // self-created QMenu that this Qt5Menu represents, if applicable (s. comment for class)
+    std::unique_ptr<QMenu> mpOwnedQMenu;
+    // pointer to QMenu owned by the corresponding Qt5MenuItem or self (-> mpOwnedQMenu)
+    QMenu* mpQMenu;
+    QPushButton* mpCloseButton;
+    QMetaObject::Connection maCloseButtonConnection;
+
+    void DoFullMenuUpdate(Menu* pMenuBar);
+    static void NativeItemText(OUString& rItemText);
+
+    void InsertMenuItem(Qt5MenuItem* pSalMenuItem, unsigned nPos);
+
+    void ReinitializeActionGroup(unsigned nPos);
+    void ResetAllActionGroups();
+    void UpdateActionGroupItem(const Qt5MenuItem* pSalMenuItem);
+
+public:
+    Qt5Menu(bool bMenuBar);
+
+    virtual bool VisibleMenuBar() override; // must return TRUE to actually DISPLAY native menu bars
+
+    virtual void InsertItem(SalMenuItem* pSalMenuItem, unsigned nPos) override;
+    virtual void RemoveItem(unsigned nPos) override;
+    virtual void SetSubMenu(SalMenuItem* pSalMenuItem, SalMenu* pSubMenu, unsigned nPos) override;
+    virtual void SetFrame(const SalFrame* pFrame) override;
+    const Qt5Frame* GetFrame() const;
+    virtual void ShowMenuBar(bool bVisible) override;
+    virtual bool ShowNativePopupMenu(FloatingWindow* pWin, const tools::Rectangle& rRect,
+                                     FloatWinPopupFlags nFlags) override;
+    Qt5Menu* GetTopLevel();
+    virtual void SetItemBits(unsigned nPos, MenuItemBits nBits) override;
+    virtual void CheckItem(unsigned nPos, bool bCheck) override;
+    virtual void EnableItem(unsigned nPos, bool bEnable) override;
+    virtual void ShowItem(unsigned nPos, bool bShow) override;
+    virtual void SetItemText(unsigned nPos, SalMenuItem* pSalMenuItem,
+                             const OUString& rText) override;
+    virtual void SetItemImage(unsigned nPos, SalMenuItem* pSalMenuItem,
+                              const Image& rImage) override;
+    virtual void SetAccelerator(unsigned nPos, SalMenuItem* pSalMenuItem,
+                                const vcl::KeyCode& rKeyCode, const OUString& rKeyName) override;
+    virtual void GetSystemMenuData(SystemMenuData* pData) override;
+    virtual void ShowCloseButton(bool bShow) override;
+
+    void SetMenu(Menu* pMenu) { mpVCLMenu = pMenu; }
+    Menu* GetMenu() { return mpVCLMenu; }
+    unsigned GetItemCount() const { return maItems.size(); }
+    Qt5MenuItem* GetItemAtPos(unsigned nPos) { return maItems[nPos]; }
+
+private slots:
+    static void slotMenuTriggered(Qt5MenuItem* pQItem);
+    static void slotMenuAboutToShow(Qt5MenuItem* pQItem);
+    static void slotMenuAboutToHide(Qt5MenuItem* pQItem);
+    void slotCloseDocument();
+};
+
+class Qt5MenuItem : public SalMenuItem
+{
+public:
+    Qt5MenuItem(const SalItemParams*);
+
+    QAction* getAction() const;
+
+    Qt5Menu* mpParentMenu; // The menu into which this menu item is inserted
+    Qt5Menu* mpSubMenu; // Submenu of this item (if defined)
+    std::unique_ptr<QAction> mpAction; // action corresponding to this item
+    std::unique_ptr<QMenu> mpMenu; // menu corresponding to this item
+    std::shared_ptr<QActionGroup> mpActionGroup; // empty if it's a separator element
+    sal_uInt16 mnId; // Item ID
+    MenuItemType mnType; // Item type
+    bool mbVisible; // Item visibility.
+    bool mbEnabled; // Item active.
+    Image maImage; // Item image
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/inc/qt5/Qt5Object.hxx b/vcl/inc/qt5/Qt5Object.hxx
new file mode 100644
index 000000000..0479db2d6
--- /dev/null
+++ b/vcl/inc/qt5/Qt5Object.hxx
@@ -0,0 +1,79 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <salobj.hxx>
+#include <vcl/sysdata.hxx>
+
+#include <QtCore/QObject>
+#include <QtGui/QRegion>
+#include <QtGui/QWindow>
+
+class Qt5Frame;
+class QWidget;
+
+class Qt5Object final : public QObject, public SalObject
+{
+    Q_OBJECT
+
+    SystemEnvData m_aSystemData;
+    Qt5Frame* m_pParent;
+    QWidget* m_pQWidget; // main widget, container
+    QWindow* m_pQWindow; // contained window, used for opengl rendering
+    QRegion m_pRegion;
+
+public:
+    Qt5Object(Qt5Frame* pParent, bool bShow);
+    ~Qt5Object() override;
+
+    Qt5Frame* frame() const { return m_pParent; }
+    QWidget* widget() const { return m_pQWidget; }
+    QWindow* windowHandle() const { return m_pQWindow; }
+
+    virtual void ResetClipRegion() override;
+    virtual void BeginSetClipRegion(sal_uInt32 nRects) override;
+    virtual void UnionClipRegion(long nX, long nY, long nWidth, long nHeight) override;
+    virtual void EndSetClipRegion() override;
+
+    virtual void SetPosSize(long nX, long nY, long nWidth, long nHeight) override;
+    virtual void Show(bool bVisible) override;
+
+    virtual void SetForwardKey(bool bEnable) override;
+
+    virtual const SystemEnvData* GetSystemData() const override { return &m_aSystemData; }
+};
+
+class Qt5ObjectWindow final : public QWindow
+{
+    Qt5Object& m_rParent;
+
+    bool event(QEvent*) override;
+    void focusInEvent(QFocusEvent*) override;
+    void focusOutEvent(QFocusEvent*) override;
+    void mousePressEvent(QMouseEvent*) override;
+    void mouseReleaseEvent(QMouseEvent*) override;
+    // keyPressEvent(QKeyEvent*) is handled via event(QEvent*); see comment in Qt5Widget::event
+    void keyReleaseEvent(QKeyEvent*) override;
+
+public:
+    explicit Qt5ObjectWindow(Qt5Object& rParent);
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/inc/qt5/Qt5OpenGLContext.hxx b/vcl/inc/qt5/Qt5OpenGLContext.hxx
new file mode 100644
index 000000000..df5424620
--- /dev/null
+++ b/vcl/inc/qt5/Qt5OpenGLContext.hxx
@@ -0,0 +1,50 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <vcl/opengl/OpenGLContext.hxx>
+
+class QWindow;
+class QOpenGLContext;
+
+class Qt5OpenGLContext final : public OpenGLContext
+{
+public:
+    virtual void initWindow() override;
+
+private:
+    virtual const GLWindow& getOpenGLWindow() const override { return m_aGLWin; }
+    virtual GLWindow& getModifiableOpenGLWindow() override { return m_aGLWin; }
+    virtual bool ImplInit() override;
+
+    virtual void makeCurrent() override;
+    virtual void destroyCurrentContext() override;
+    virtual bool isCurrent() override;
+    virtual bool isAnyCurrent() override;
+    virtual void resetCurrent() override;
+    virtual void swapBuffers() override;
+
+    static bool g_bAnyCurrent;
+
+    GLWindow m_aGLWin;
+
+    QWindow* m_pWindow;
+    QOpenGLContext* m_pContext;
+};
diff --git a/vcl/inc/qt5/Qt5Painter.hxx b/vcl/inc/qt5/Qt5Painter.hxx
new file mode 100644
index 000000000..51ddc3d69
--- /dev/null
+++ b/vcl/inc/qt5/Qt5Painter.hxx
@@ -0,0 +1,67 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <QtCore/QRectF>
+#include <QtGui/QPainter>
+#include <QtWidgets/QWidget>
+
+#include "Qt5Frame.hxx"
+#include "Qt5Graphics.hxx"
+
+class Qt5Painter final : public QPainter
+{
+    Qt5Graphics& m_rGraphics;
+    QRegion m_aRegion;
+
+public:
+    Qt5Painter(Qt5Graphics& rGraphics, bool bPrepareBrush = false, sal_uInt8 nTransparency = 255);
+    ~Qt5Painter()
+    {
+        if (m_rGraphics.m_pFrame && !m_aRegion.isEmpty())
+            m_rGraphics.m_pFrame->GetQWidget()->update(m_aRegion);
+    }
+
+    void update(int nx, int ny, int nw, int nh)
+    {
+        if (m_rGraphics.m_pFrame)
+            m_aRegion += scaledQRect({ nx, ny, nw, nh }, 1 / m_rGraphics.devicePixelRatioF());
+    }
+
+    void update(const QRect& rRect)
+    {
+        if (m_rGraphics.m_pFrame)
+            m_aRegion += scaledQRect(rRect, 1 / m_rGraphics.devicePixelRatioF());
+    }
+
+    void update(const QRectF& rRectF)
+    {
+        if (m_rGraphics.m_pFrame)
+            update(scaledQRect(rRectF.toAlignedRect(), 1 / m_rGraphics.devicePixelRatioF()));
+    }
+
+    void update()
+    {
+        if (m_rGraphics.m_pFrame)
+            m_aRegion += m_rGraphics.m_pFrame->GetQWidget()->rect();
+    }
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/inc/qt5/Qt5Printer.hxx b/vcl/inc/qt5/Qt5Printer.hxx
new file mode 100644
index 000000000..23f5428ca
--- /dev/null
+++ b/vcl/inc/qt5/Qt5Printer.hxx
@@ -0,0 +1,32 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <unx/genprn.h>
+
+class SalFrame;
+
+class Qt5Printer final : public PspSalPrinter
+{
+public:
+    Qt5Printer(SalInfoPrinter* pInfoPrinter);
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/inc/qt5/Qt5SvpGraphics.hxx b/vcl/inc/qt5/Qt5SvpGraphics.hxx
new file mode 100644
index 000000000..2ea5e6ad9
--- /dev/null
+++ b/vcl/inc/qt5/Qt5SvpGraphics.hxx
@@ -0,0 +1,55 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <vclpluginapi.h>
+#include <headless/svpgdi.hxx>
+
+#include "Qt5GraphicsBase.hxx"
+
+class Qt5Frame;
+
+class VCLPLUG_QT5_PUBLIC Qt5SvpGraphics : public SvpSalGraphics, public Qt5GraphicsBase
+{
+    Qt5Frame* const m_pFrame;
+
+protected:
+    void handleDamage(const tools::Rectangle&) override;
+
+public:
+    Qt5SvpGraphics(Qt5Frame* pFrame);
+    ~Qt5SvpGraphics() override;
+
+    void updateQWidget() const;
+
+#if ENABLE_CAIRO_CANVAS
+    bool SupportsCairo() const override;
+    cairo::SurfaceSharedPtr
+    CreateSurface(const cairo::CairoSurfaceSharedPtr& rSurface) const override;
+    cairo::SurfaceSharedPtr CreateSurface(const OutputDevice& rRefDevice, int x, int y, int width,
+                                          int height) const override;
+#endif // ENABLE_CAIRO_CANVAS
+
+    virtual void GetResolution(sal_Int32& rDPIX, sal_Int32& rDPIY) override;
+
+    virtual OUString getRenderBackendName() const override { return "qt5svp"; }
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/inc/qt5/Qt5SvpSurface.hxx b/vcl/inc/qt5/Qt5SvpSurface.hxx
new file mode 100644
index 000000000..0e4da4877
--- /dev/null
+++ b/vcl/inc/qt5/Qt5SvpSurface.hxx
@@ -0,0 +1,44 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <vcl/cairo.hxx>
+
+class Qt5SvpGraphics;
+class OutputDevice;
+
+namespace cairo
+{
+class Qt5SvpSurface final : public Surface
+{
+    const Qt5SvpGraphics* m_pGraphics;
+    cairo_t* const m_pCairoContext;
+    CairoSurfaceSharedPtr m_pSurface;
+
+public:
+    /// takes over ownership of passed cairo_surface
+    explicit Qt5SvpSurface(const CairoSurfaceSharedPtr& pSurface);
+    /// create surface on subarea of given drawable
+    explicit Qt5SvpSurface(const Qt5SvpGraphics* pGraphics, int x, int y, int width, int height);
+    ~Qt5SvpSurface() override;
+
+    // Surface interface
+    CairoSharedPtr getCairo() const override;
+    CairoSurfaceSharedPtr getCairoSurface() const override { return m_pSurface; }
+    SurfaceSharedPtr getSimilar(int nContentType, int width, int height) const override;
+
+    VclPtr<VirtualDevice> createVirtualDevice() const override;
+    void flush() const override;
+};
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/inc/qt5/Qt5System.hxx b/vcl/inc/qt5/Qt5System.hxx
new file mode 100644
index 000000000..63a7e9bde
--- /dev/null
+++ b/vcl/inc/qt5/Qt5System.hxx
@@ -0,0 +1,23 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+#include <unx/gensys.h>
+
+class Qt5System final : public SalGenericSystem
+{
+public:
+    virtual unsigned int GetDisplayScreenCount() override;
+    virtual tools::Rectangle GetDisplayScreenPosSizePixel(unsigned int nScreen) override;
+    virtual int ShowNativeDialog(const OUString& rTitle, const OUString& rMessage,
+                                 const std::vector<OUString>& rButtons) override;
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/inc/qt5/Qt5Timer.hxx b/vcl/inc/qt5/Qt5Timer.hxx
new file mode 100644
index 000000000..20b2a4c70
--- /dev/null
+++ b/vcl/inc/qt5/Qt5Timer.hxx
@@ -0,0 +1,47 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <saltimer.hxx>
+#include <QtCore/QTimer>
+
+class Qt5Timer final : public QObject, public SalTimer
+{
+    Q_OBJECT
+
+    QTimer m_aTimer;
+
+private Q_SLOTS:
+    void timeoutActivated();
+    void startTimer(int);
+    void stopTimer();
+
+Q_SIGNALS:
+    void startTimerSignal(int);
+    void stopTimerSignal();
+
+public:
+    Qt5Timer();
+
+    virtual void Start(sal_uInt64 nMS) override;
+    virtual void Stop() override;
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/inc/qt5/Qt5Tools.hxx b/vcl/inc/qt5/Qt5Tools.hxx
new file mode 100644
index 000000000..1b58750ec
--- /dev/null
+++ b/vcl/inc/qt5/Qt5Tools.hxx
@@ -0,0 +1,154 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <QtCore/QPoint>
+#include <QtCore/QRect>
+#include <QtCore/QSize>
+#include <QtCore/QString>
+#include <QtGui/QImage>
+
+#include <rtl/string.hxx>
+#include <rtl/ustring.hxx>
+#include <tools/color.hxx>
+#include <tools/gen.hxx>
+
+#include <com/sun/star/uno/Sequence.hxx>
+#include <com/sun/star/datatransfer/dnd/DNDConstants.hpp>
+
+#include <memory>
+
+class Image;
+class QImage;
+
+inline OUString toOUString(const QString& s)
+{
+    // QString stores UTF16, just like OUString
+    return OUString(reinterpret_cast<const sal_Unicode*>(s.data()), s.length());
+}
+
+inline QString toQString(const OUString& s)
+{
+    return QString::fromUtf16(reinterpret_cast<ushort const*>(s.getStr()), s.getLength());
+}
+
+inline QRect toQRect(const tools::Rectangle& rRect)
+{
+    return QRect(rRect.Left(), rRect.Top(), rRect.GetWidth(), rRect.GetHeight());
+}
+
+inline QRect toQRect(const tools::Rectangle& rRect, const qreal fScale)
+{
+    return QRect(floor(rRect.Left() * fScale), floor(rRect.Top() * fScale),
+                 ceil(rRect.GetWidth() * fScale), ceil(rRect.GetHeight() * fScale));
+}
+
+inline QRect scaledQRect(const QRect& rRect, const qreal fScale)
+{
+    return QRect(floor(rRect.x() * fScale), floor(rRect.y() * fScale), ceil(rRect.width() * fScale),
+                 ceil(rRect.height() * fScale));
+}
+
+inline tools::Rectangle toRectangle(const QRect& rRect)
+{
+    return tools::Rectangle(rRect.left(), rRect.top(), rRect.right(), rRect.bottom());
+}
+
+inline QSize toQSize(const Size& rSize) { return QSize(rSize.Width(), rSize.Height()); }
+
+inline Size toSize(const QSize& rSize) { return Size(rSize.width(), rSize.height()); }
+
+inline Point toPoint(const QPoint& rPoint) { return Point(rPoint.x(), rPoint.y()); }
+
+inline QColor toQColor(const Color& rColor)
+{
+    return QColor(rColor.GetRed(), rColor.GetGreen(), rColor.GetBlue(),
+                  255 - rColor.GetTransparency());
+}
+
+Qt::DropActions toQtDropActions(sal_Int8 dragOperation);
+sal_Int8 toVclDropActions(Qt::DropActions dragOperation);
+sal_Int8 toVclDropAction(Qt::DropAction dragOperation);
+Qt::DropAction getPreferredDropAction(sal_Int8 dragOperation);
+
+inline QList<int> toQList(const css::uno::Sequence<sal_Int32>& aSequence)
+{
+    QList<int> aList;
+    for (sal_Int32 i : aSequence)
+    {
+        aList.append(i);
+    }
+    return aList;
+}
+
+static constexpr QImage::Format Qt5_DefaultFormat32 = QImage::Format_ARGB32;
+
+inline QImage::Format getBitFormat(sal_uInt16 nBitCount)
+{
+    switch (nBitCount)
+    {
+        case 1:
+            return QImage::Format_Mono;
+        case 8:
+            return QImage::Format_Indexed8;
+        case 24:
+            return QImage::Format_RGB888;
+        case 32:
+            return Qt5_DefaultFormat32;
+        default:
+            std::abort();
+            break;
+    }
+    return QImage::Format_Invalid;
+}
+
+inline sal_uInt16 getFormatBits(QImage::Format eFormat)
+{
+    switch (eFormat)
+    {
+        case QImage::Format_Mono:
+            return 1;
+        case QImage::Format_Indexed8:
+            return 8;
+        case QImage::Format_RGB888:
+            return 24;
+        case Qt5_DefaultFormat32:
+        case QImage::Format_ARGB32_Premultiplied:
+            return 32;
+        default:
+            std::abort();
+            return 0;
+    }
+}
+
+typedef struct _cairo_surface cairo_surface_t;
+struct CairoDeleter
+{
+    void operator()(cairo_surface_t* pSurface) const;
+};
+
+typedef std::unique_ptr<cairo_surface_t, CairoDeleter> UniqueCairoSurface;
+
+sal_uInt16 GetKeyModCode(Qt::KeyboardModifiers eKeyModifiers);
+sal_uInt16 GetMouseModCode(Qt::MouseButtons eButtons);
+
+QImage toQImage(const Image& rImage);
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/inc/qt5/Qt5Transferable.hxx b/vcl/inc/qt5/Qt5Transferable.hxx
new file mode 100644
index 000000000..0d1cc7050
--- /dev/null
+++ b/vcl/inc/qt5/Qt5Transferable.hxx
@@ -0,0 +1,124 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ */
+
+#pragma once
+
+#include <cppuhelper/compbase.hxx>
+#include <com/sun/star/datatransfer/XTransferable.hpp>
+
+#include <QtCore/QMimeData>
+#include <QtCore/QStringList>
+#include <QtGui/QClipboard>
+
+/**
+ * Qt5Transferable classes are used to read QMimeData via the XTransferable
+ * interface. All the functionality is already implemented in the Qt5Transferable.
+ *
+ * The specialisations map to the two users, which provide QMimeData: the Clipboard
+ * and the Drag'n'Drop functionality.
+ *
+ * LO itself seem to just accept "text/plain;charset=utf-16", so it relies on the
+ * backend to convert to this charset, but still offers "text/plain" itself.
+ *
+ * It's the "mirror" interface of the Qt5MimeData, which is defined below.
+ **/
+class Qt5Transferable : public cppu::WeakImplHelper<css::datatransfer::XTransferable>
+{
+    Qt5Transferable(const Qt5Transferable&) = delete;
+
+    const QMimeData* m_pMimeData;
+    osl::Mutex m_aMutex;
+    bool m_bConvertFromLocale;
+    css::uno::Sequence<css::datatransfer::DataFlavor> m_aMimeTypeSeq;
+
+public:
+    Qt5Transferable(const QMimeData* pMimeData);
+    const QMimeData* mimeData() const { return m_pMimeData; }
+
+    css::uno::Sequence<css::datatransfer::DataFlavor> SAL_CALL getTransferDataFlavors() override;
+    sal_Bool SAL_CALL isDataFlavorSupported(const css::datatransfer::DataFlavor& rFlavor) override;
+    css::uno::Any SAL_CALL getTransferData(const css::datatransfer::DataFlavor& rFlavor) override;
+};
+
+/**
+ * The QClipboard's QMimeData is volatile. As written in the QClipboard::mimeData
+ * documentation, "the pointer returned might become invalidated when the contents
+ * of the clipboard changes". Therefore it can just be accessed reliably inside
+ * the QClipboard's object thread, which is the QApplication's thread, so all of
+ * the access has to go through RunInMainThread().
+ *
+ * If we detect a QMimeData change, we simply drop reporting any content. In theory
+ * we can recover in the case where there hadn't been any calls of the XTransferable
+ * interface, but currently we don't. But we ensure to never report mixed content,
+ * so we'll just cease operation on QMimeData change.
+ **/
+class Qt5ClipboardTransferable final : public Qt5Transferable
+{
+    // to detect in-flight QMimeData changes
+    const QClipboard::Mode m_aMode;
+
+    bool hasInFlightChanged() const;
+
+public:
+    explicit Qt5ClipboardTransferable(const QClipboard::Mode aMode, const QMimeData* pMimeData);
+
+    // these are the same then Qt5Transferable, except they go through RunInMainThread
+    css::uno::Sequence<css::datatransfer::DataFlavor> SAL_CALL getTransferDataFlavors() override;
+    sal_Bool SAL_CALL isDataFlavorSupported(const css::datatransfer::DataFlavor& rFlavor) override;
+    css::uno::Any SAL_CALL getTransferData(const css::datatransfer::DataFlavor& rFlavor) override;
+};
+
+/**
+ * Convenience typedef for better code readability
+ *
+ * This just uses the QMimeData provided by the QWidgets D'n'D events.
+ **/
+typedef Qt5Transferable Qt5DnDTransferable;
+
+/**
+ * A lazy loading QMimeData for XTransferable reads
+ *
+ * This is an interface class to make a XTransferable read accessible as a
+ * QMimeData. The mime data is just stored inside the XTransferable, never
+ * in the QMimeData itself! It's objects are just used for QClipboard to read
+ * the XTransferable data.
+ *
+ * Like XTransferable itself, this class should be considered an immutable
+ * container for mime data. There is no need to ever set any of its data.
+ *
+ * LO will offer at least UTF-16, if there is a viable text representation.
+ * If LO misses to offer a UTF-8 or a locale encoded string, these objects
+ * will offer them themselves and convert from UTF-16 on demand.
+ *
+ * It's the "mirror" interface of the Qt5Transferable.
+ **/
+class Qt5MimeData final : public QMimeData
+{
+    friend class Qt5ClipboardTransferable;
+
+    const css::uno::Reference<css::datatransfer::XTransferable> m_aContents;
+    mutable bool m_bHaveNoCharset; // = uses the locale charset
+    mutable bool m_bHaveUTF8;
+    mutable QStringList m_aMimeTypeList;
+
+    QVariant retrieveData(const QString& mimeType, QVariant::Type type) const override;
+
+public:
+    explicit Qt5MimeData(const css::uno::Reference<css::datatransfer::XTransferable>& aContents);
+
+    bool hasFormat(const QString& mimeType) const override;
+    QStringList formats() const override;
+
+    bool deepCopy(QMimeData** const) const;
+
+    css::datatransfer::XTransferable* xTransferable() const { return m_aContents.get(); }
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/inc/qt5/Qt5VirtualDevice.hxx b/vcl/inc/qt5/Qt5VirtualDevice.hxx
new file mode 100644
index 000000000..89251c96d
--- /dev/null
+++ b/vcl/inc/qt5/Qt5VirtualDevice.hxx
@@ -0,0 +1,56 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <salvd.hxx>
+
+#include <memory>
+#include <list>
+
+#include <QtCore/QSize>
+
+class Qt5Graphics;
+class QImage;
+enum class DeviceFormat;
+
+class Qt5VirtualDevice final : public SalVirtualDevice
+{
+    std::list<Qt5Graphics*> m_aGraphics;
+    std::unique_ptr<QImage> m_pImage;
+    DeviceFormat m_eFormat;
+    QSize m_aFrameSize;
+    double m_fScale;
+
+public:
+    Qt5VirtualDevice(DeviceFormat eFormat, double fScale);
+
+    // SalVirtualDevice
+    virtual SalGraphics* AcquireGraphics() override;
+    virtual void ReleaseGraphics(SalGraphics* pGraphics) override;
+
+    virtual bool SetSize(long nNewDX, long nNewDY) override;
+    virtual bool SetSizeUsingBuffer(long nNewDX, long nNewDY, sal_uInt8* pBuffer) override;
+
+    // SalGeometryProvider
+    virtual long GetWidth() const override;
+    virtual long GetHeight() const override;
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/inc/qt5/Qt5Widget.hxx b/vcl/inc/qt5/Qt5Widget.hxx
new file mode 100644
index 000000000..159794b2d
--- /dev/null
+++ b/vcl/inc/qt5/Qt5Widget.hxx
@@ -0,0 +1,103 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <QtWidgets/QWidget>
+#include <rtl/ustring.hxx>
+
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/accessibility/XAccessibleEditableText.hpp>
+
+class Qt5Frame;
+class Qt5Object;
+
+class Qt5Widget : public QWidget
+{
+    Q_OBJECT
+
+    Qt5Frame& m_rFrame;
+    bool m_bNonEmptyIMPreeditSeen;
+    int m_nDeltaX;
+    int m_nDeltaY;
+
+    enum class ButtonKeyState
+    {
+        Pressed,
+        Released
+    };
+
+    static void commitText(Qt5Frame&, const QString& aText);
+    static bool handleKeyEvent(Qt5Frame&, const QWidget&, QKeyEvent*, const ButtonKeyState);
+    static void handleMouseButtonEvent(const Qt5Frame&, const QMouseEvent*, const ButtonKeyState);
+
+    virtual bool event(QEvent*) override;
+
+    virtual void focusInEvent(QFocusEvent*) override;
+    virtual void focusOutEvent(QFocusEvent*) override;
+    // keyPressEvent(QKeyEvent*) is handled via event(QEvent*); see comment
+    virtual void keyReleaseEvent(QKeyEvent*) override;
+    virtual void mouseMoveEvent(QMouseEvent*) override;
+    virtual void mousePressEvent(QMouseEvent*) override;
+    virtual void mouseReleaseEvent(QMouseEvent*) override;
+    virtual void dragEnterEvent(QDragEnterEvent*) override;
+    virtual void dragLeaveEvent(QDragLeaveEvent*) override;
+    virtual void dragMoveEvent(QDragMoveEvent*) override;
+    virtual void dropEvent(QDropEvent*) override;
+    virtual void moveEvent(QMoveEvent*) override;
+    virtual void paintEvent(QPaintEvent*) override;
+    virtual void resizeEvent(QResizeEvent*) override;
+    virtual void showEvent(QShowEvent*) override;
+    virtual void wheelEvent(QWheelEvent*) override;
+    virtual void closeEvent(QCloseEvent*) override;
+    virtual void changeEvent(QEvent*) override;
+
+    void inputMethodEvent(QInputMethodEvent*) override;
+    QVariant inputMethodQuery(Qt::InputMethodQuery) const override;
+
+public:
+    Qt5Widget(Qt5Frame& rFrame, Qt::WindowFlags f = Qt::WindowFlags());
+
+    Qt5Frame& frame() const { return m_rFrame; }
+    void endExtTextInput();
+
+    static bool handleEvent(Qt5Frame&, const QWidget&, QEvent*);
+    // key events might be propagated further down => call base on false
+    static inline bool handleKeyReleaseEvent(Qt5Frame&, const QWidget&, QKeyEvent*);
+    // mouse events are always accepted
+    static inline void handleMousePressEvent(const Qt5Frame&, const QMouseEvent*);
+    static inline void handleMouseReleaseEvent(const Qt5Frame&, const QMouseEvent*);
+};
+
+bool Qt5Widget::handleKeyReleaseEvent(Qt5Frame& rFrame, const QWidget& rWidget, QKeyEvent* pEvent)
+{
+    return handleKeyEvent(rFrame, rWidget, pEvent, ButtonKeyState::Released);
+}
+
+void Qt5Widget::handleMousePressEvent(const Qt5Frame& rFrame, const QMouseEvent* pEvent)
+{
+    handleMouseButtonEvent(rFrame, pEvent, ButtonKeyState::Pressed);
+}
+
+void Qt5Widget::handleMouseReleaseEvent(const Qt5Frame& rFrame, const QMouseEvent* pEvent)
+{
+    handleMouseButtonEvent(rFrame, pEvent, ButtonKeyState::Released);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/inc/qt5/Qt5XAccessible.hxx b/vcl/inc/qt5/Qt5XAccessible.hxx
new file mode 100644
index 000000000..fe8e424e4
--- /dev/null
+++ b/vcl/inc/qt5/Qt5XAccessible.hxx
@@ -0,0 +1,34 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+#include <vclpluginapi.h>
+
+#include <QtCore/QObject>
+
+#include <com/sun/star/accessibility/XAccessible.hpp>
+
+#include <vcl/window.hxx>
+
+class Qt5Frame;
+class Qt5Widget;
+
+// Wrapper class to hold a css::accessibility::XAccessible object
+// while being able to pass it as a QObject
+class Qt5XAccessible : public QObject
+{
+    Q_OBJECT
+
+public:
+    Qt5XAccessible(css::uno::Reference<css::accessibility::XAccessible> xAccessible);
+    css::uno::Reference<css::accessibility::XAccessible> m_xAccessible;
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */