Menu & MenuItem: use widgets as a fallback

This makes context menus available on Windows and KDE. One more reason
to keep the module experimental. In the long run, platforms should
implement QPA menus so that we can remove the undesired dependency.

Change-Id: Ifd2d1e92512a05a95d3e7e7e7c00d712e06ce0cb
Reviewed-by: J-P Nurmi <jpnurmi@qt.io>

10 files changed, 655 insertions, 1 deletions

diff --git a/src/imports/platform/doc/src/includes/widgets.qdocinc b/src/imports/platform/doc/src/includes/widgets.qdocinc
new file mode 100644
index 00000000..c89c3ca0
--- /dev/null
+++ b/src/imports/platform/doc/src/includes/widgets.qdocinc
@@ -0,0 +1,29 @@
+//! [1]
+The Qt Labs Platform module uses Qt Widgets as a fallback on platforms that
+do not have a native implementation available. Therefore, applications that
+use types from the Qt Labs Platform module should link to QtWidgets and use
+\l QApplication instead of \l QGuiApplication.
+
+To link against the QtWidgets library, add the following to your qmake project
+file:
+
+\code
+QT += widgets
+\endcode
+
+Create an instance of \l QApplication in \c main():
+
+\code
+#include <QApplication>
+#include <QQmlApplicationEngine>
+
+int main(int argc, char *argv[])
+{
+    QApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
+    QApplication app(argc, argv);
+    QQmlApplicationEngine engine;
+    engine.load(QUrl(QStringLiteral("qrc:/main.qml")));
+    return app.exec();
+}
+\endcode
+//! [1]
diff --git a/src/imports/platform/platform.pro b/src/imports/platform/platform.pro
index 8126860b..f3926b07 100644
--- a/src/imports/platform/platform.pro
+++ b/src/imports/platform/platform.pro
@@ -16,6 +16,9 @@ SOURCES += \
     $$PWD/qtlabsplatformplugin.cpp
 
 include(platform.pri)
+qtHaveModule(widgets) {
+    win32|linux:include(widgets/widgets.pri)
+}
 
 CONFIG += no_cxx_module
 load(qml_plugin)
diff --git a/src/imports/platform/qquickplatformmenu.cpp b/src/imports/platform/qquickplatformmenu.cpp
index 4409564d..cbe07e71 100644
--- a/src/imports/platform/qquickplatformmenu.cpp
+++ b/src/imports/platform/qquickplatformmenu.cpp
@@ -51,6 +51,10 @@
 #include <QtQuick/qquickwindow.h>
 #include <QtQuick/qquickitem.h>
 
+#ifdef QT_WIDGETS_LIB
+#include "widgets/qwidgetplatformmenu_p.h"
+#endif
+
 QT_BEGIN_NAMESPACE
 
 /*!
@@ -93,7 +97,9 @@ QT_BEGIN_NAMESPACE
     }
     \endcode
 
-    Menu is currently available on the following platforms:
+    \section2 Availability
+
+    A native platform menu is currently available on the following platforms:
 
     \list
     \li OS X
@@ -102,6 +108,8 @@ QT_BEGIN_NAMESPACE
     \li Linux (only available as a stand-alone context menu when running with the GTK platform theme)
     \endlist
 
+    \input includes/widgets.qdocinc 1
+
     \labs
 
     \sa MenuItem, MenuBar
@@ -174,6 +182,11 @@ QPlatformMenu * QQuickPlatformMenu::create()
         if (!m_handle)
             m_handle = QGuiApplicationPrivate::platformTheme()->createPlatformMenu();
 
+#ifdef QT_WIDGETS_LIB
+        if (!m_handle)
+            m_handle = new QWidgetPlatformMenu;
+#endif
+
         if (m_handle) {
             connect(m_handle, &QPlatformMenu::aboutToShow, this, &QQuickPlatformMenu::aboutToShow);
             connect(m_handle, &QPlatformMenu::aboutToHide, this, &QQuickPlatformMenu::aboutToHide);
diff --git a/src/imports/platform/qquickplatformmenuitem.cpp b/src/imports/platform/qquickplatformmenuitem.cpp
index 115714f8..5417c3e0 100644
--- a/src/imports/platform/qquickplatformmenuitem.cpp
+++ b/src/imports/platform/qquickplatformmenuitem.cpp
@@ -44,6 +44,10 @@
 #include <QtGui/qpa/qplatformtheme.h>
 #include <QtGui/private/qguiapplication_p.h>
 
+#ifdef QT_WIDGETS_LIB
+#include "widgets/qwidgetplatformmenuitem_p.h"
+#endif
+
 QT_BEGIN_NAMESPACE
 
 /*!
@@ -138,6 +142,11 @@ QPlatformMenuItem *QQuickPlatformMenuItem::create()
         if (!m_handle)
             m_handle = QGuiApplicationPrivate::platformTheme()->createPlatformMenuItem();
 
+#ifdef QT_WIDGETS_LIB
+        if (!m_handle)
+            m_handle = new QWidgetPlatformMenuItem;
+#endif
+
         if (m_handle) {
             connect(m_handle, &QPlatformMenuItem::activated, this, &QQuickPlatformMenuItem::triggered);
             connect(m_handle, &QPlatformMenuItem::hovered, this, &QQuickPlatformMenuItem::hovered);
diff --git a/src/imports/platform/widgets/qwidgetplatform_p.h b/src/imports/platform/widgets/qwidgetplatform_p.h
new file mode 100644
index 00000000..212900cf
--- /dev/null
+++ b/src/imports/platform/widgets/qwidgetplatform_p.h
@@ -0,0 +1,72 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the Qt Labs Platform module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QWIDGETPLATFORM_P_H
+#define QWIDGETPLATFORM_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QtCore/qdebug.h>
+#include <QtWidgets/qapplication.h>
+
+QT_BEGIN_NAMESPACE
+
+namespace QWidgetPlatform
+{
+    static inline bool isAvailable(const char *type)
+    {
+        if (!qobject_cast<QApplication *>(QCoreApplication::instance())) {
+            qCritical("\nERROR: No native %s implementation available."
+                      "\nQt Labs Platform requires Qt Widgets on this platform."
+                      "\nAdd 'QT += widgets' to .pro and create QApplication in main().\n", type);
+            return false;
+        }
+        return true;
+    }
+}
+
+QT_END_NAMESPACE
+
+#endif // QWIDGETPLATFORM_P_H
diff --git a/src/imports/platform/widgets/qwidgetplatformmenu.cpp b/src/imports/platform/widgets/qwidgetplatformmenu.cpp
new file mode 100644
index 00000000..a3faafa0
--- /dev/null
+++ b/src/imports/platform/widgets/qwidgetplatformmenu.cpp
@@ -0,0 +1,199 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the Qt Labs Platform module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qwidgetplatformmenu_p.h"
+#include "qwidgetplatformmenuitem_p.h"
+#include "qwidgetplatform_p.h"
+
+#include <QtGui/qwindow.h>
+#include <QtWidgets/qmenu.h>
+#include <QtWidgets/qaction.h>
+
+QT_BEGIN_NAMESPACE
+
+QWidgetPlatformMenu::QWidgetPlatformMenu(QObject *parent)
+{
+    setParent(parent);
+
+    static bool available = QWidgetPlatform::isAvailable("menu");
+    if (available) {
+        m_menu.reset(new QMenu);
+        connect(m_menu.data(), &QMenu::aboutToShow, this, &QPlatformMenu::aboutToShow);
+        connect(m_menu.data(), &QMenu::aboutToHide, this, &QPlatformMenu::aboutToHide);
+    }
+}
+
+QWidgetPlatformMenu::~QWidgetPlatformMenu()
+{
+}
+
+QMenu *QWidgetPlatformMenu::menu() const
+{
+    return m_menu.data();
+}
+
+void QWidgetPlatformMenu::insertMenuItem(QPlatformMenuItem *item, QPlatformMenuItem *before)
+{
+    QWidgetPlatformMenuItem *widgetItem = qobject_cast<QWidgetPlatformMenuItem *>(item);
+    if (!widgetItem || !m_menu)
+        return;
+
+    QWidgetPlatformMenuItem *widgetBefore = qobject_cast<QWidgetPlatformMenuItem *>(before);
+    m_menu->insertAction(widgetBefore ? widgetBefore->action() : nullptr, widgetItem->action());
+}
+
+void QWidgetPlatformMenu::removeMenuItem(QPlatformMenuItem *item)
+{
+    QWidgetPlatformMenuItem *widgetItem = qobject_cast<QWidgetPlatformMenuItem *>(item);
+    if (!widgetItem || !m_menu)
+        return;
+
+    m_menu->removeAction(widgetItem->action());
+}
+
+void QWidgetPlatformMenu::syncMenuItem(QPlatformMenuItem *item)
+{
+    Q_UNUSED(item);
+}
+
+void QWidgetPlatformMenu::syncSeparatorsCollapsible(bool enable)
+{
+    Q_UNUSED(enable);
+}
+
+quintptr QWidgetPlatformMenu::tag() const
+{
+    return 0;
+}
+
+void QWidgetPlatformMenu::setTag(quintptr tag)
+{
+    Q_UNUSED(tag);
+}
+
+void QWidgetPlatformMenu::setText(const QString &text)
+{
+    if (m_menu)
+        m_menu->setTitle(text);
+}
+
+void QWidgetPlatformMenu::setIcon(const QIcon &icon)
+{
+    if (m_menu)
+        m_menu->setIcon(icon);
+}
+
+void QWidgetPlatformMenu::setEnabled(bool enabled)
+{
+    if (m_menu)
+        m_menu->menuAction()->setEnabled(enabled);
+}
+
+bool QWidgetPlatformMenu::isEnabled() const
+{
+    return m_menu && m_menu->menuAction()->isEnabled();
+}
+
+void QWidgetPlatformMenu::setVisible(bool visible)
+{
+    if (m_menu)
+        m_menu->menuAction()->setVisible(visible);
+}
+
+void QWidgetPlatformMenu::setMinimumWidth(int width)
+{
+    if (m_menu && width > 0)
+        m_menu->setMinimumWidth(width);
+}
+
+void QWidgetPlatformMenu::setFont(const QFont &font)
+{
+    if (m_menu)
+        m_menu->setFont(font);
+}
+
+void QWidgetPlatformMenu::setMenuType(MenuType type)
+{
+    Q_UNUSED(type);
+}
+
+void QWidgetPlatformMenu::showPopup(const QWindow *window, const QRect &targetRect, const QPlatformMenuItem *item)
+{
+    if (!m_menu)
+        return;
+
+    m_menu->createWinId();
+    QWindow *handle = m_menu->windowHandle();
+    Q_ASSERT(handle);
+    handle->setTransientParent(const_cast<QWindow *>(window));
+
+    QPoint targetPos = targetRect.bottomLeft();
+    if (window)
+        targetPos = window->mapToGlobal(targetPos);
+
+    const QWidgetPlatformMenuItem *widgetItem = qobject_cast<const QWidgetPlatformMenuItem *>(item);
+    m_menu->popup(targetPos, widgetItem ? widgetItem->action() : nullptr);
+}
+
+void QWidgetPlatformMenu::dismiss()
+{
+    if (m_menu)
+        m_menu->close();
+}
+
+QPlatformMenuItem *QWidgetPlatformMenu::menuItemAt(int position) const
+{
+    Q_UNUSED(position);
+    return nullptr;
+}
+
+QPlatformMenuItem *QWidgetPlatformMenu::menuItemForTag(quintptr tag) const
+{
+    Q_UNUSED(tag);
+    return nullptr;
+}
+
+QPlatformMenuItem *QWidgetPlatformMenu::createMenuItem() const
+{
+    return nullptr;
+}
+
+QPlatformMenu *QWidgetPlatformMenu::createSubMenu() const
+{
+    return nullptr;
+}
+
+QT_END_NAMESPACE
diff --git a/src/imports/platform/widgets/qwidgetplatformmenu_p.h b/src/imports/platform/widgets/qwidgetplatformmenu_p.h
new file mode 100644
index 00000000..d53a7e96
--- /dev/null
+++ b/src/imports/platform/widgets/qwidgetplatformmenu_p.h
@@ -0,0 +1,99 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the Qt Labs Platform module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QWIDGETPLATFORMMENU_P_H
+#define QWIDGETPLATFORMMENU_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QtGui/qpa/qplatformmenu.h>
+
+QT_BEGIN_NAMESPACE
+
+class QMenu;
+
+class QWidgetPlatformMenu : public QPlatformMenu
+{
+    Q_OBJECT
+
+public:
+    explicit QWidgetPlatformMenu(QObject *parent = nullptr);
+    ~QWidgetPlatformMenu();
+
+    QMenu *menu() const;
+
+    void insertMenuItem(QPlatformMenuItem *item, QPlatformMenuItem *before) override;
+    void removeMenuItem(QPlatformMenuItem *item) override;
+    void syncMenuItem(QPlatformMenuItem *item) override;
+    void syncSeparatorsCollapsible(bool enable) override;
+
+    quintptr tag()const override;
+    void setTag(quintptr tag) override;
+
+    void setText(const QString &text) override;
+    void setIcon(const QIcon &icon) override;
+    void setEnabled(bool enabled) override;
+    bool isEnabled() const override;
+    void setVisible(bool visible) override;
+    void setMinimumWidth(int width) override;
+    void setFont(const QFont &font) override;
+    void setMenuType(MenuType type) override;
+
+    void showPopup(const QWindow *window, const QRect &targetRect, const QPlatformMenuItem *item);
+    void dismiss() override;
+
+    QPlatformMenuItem *menuItemAt(int position) const override;
+    QPlatformMenuItem *menuItemForTag(quintptr tag) const override;
+
+    QPlatformMenuItem *createMenuItem() const;
+    QPlatformMenu *createSubMenu() const;
+
+private:
+    QScopedPointer<QMenu> m_menu;
+};
+
+QT_END_NAMESPACE
+
+#endif // QWIDGETPLATFORMMENU_P_H
diff --git a/src/imports/platform/widgets/qwidgetplatformmenuitem.cpp b/src/imports/platform/widgets/qwidgetplatformmenuitem.cpp
new file mode 100644
index 00000000..4d168f7a
--- /dev/null
+++ b/src/imports/platform/widgets/qwidgetplatformmenuitem.cpp
@@ -0,0 +1,131 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the Qt Labs Platform module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qwidgetplatformmenuitem_p.h"
+
+#include <QtWidgets/qmenu.h>
+#include <QtWidgets/qaction.h>
+
+QT_BEGIN_NAMESPACE
+
+QWidgetPlatformMenuItem::QWidgetPlatformMenuItem(QObject *parent)
+    : m_action(new QAction)
+{
+    setParent(parent);
+    connect(m_action.data(), &QAction::hovered, this, &QPlatformMenuItem::hovered);
+    connect(m_action.data(), &QAction::triggered, this, &QPlatformMenuItem::activated);
+}
+
+QWidgetPlatformMenuItem::~QWidgetPlatformMenuItem()
+{
+}
+
+QAction *QWidgetPlatformMenuItem::action() const
+{
+    return m_action.data();
+}
+
+quintptr QWidgetPlatformMenuItem::tag() const
+{
+    return 0;
+}
+
+void QWidgetPlatformMenuItem::setTag(quintptr tag)
+{
+    Q_UNUSED(tag);
+}
+
+void QWidgetPlatformMenuItem::setText(const QString &text)
+{
+    m_action->setText(text);
+}
+
+void QWidgetPlatformMenuItem::setIcon(const QIcon &icon)
+{
+    m_action->setIcon(icon);
+}
+
+void QWidgetPlatformMenuItem::setMenu(QPlatformMenu *menu)
+{
+    m_action->setMenu(qobject_cast<QMenu *>(menu));
+}
+
+void QWidgetPlatformMenuItem::setVisible(bool visible)
+{
+    m_action->setVisible(visible);
+}
+
+void QWidgetPlatformMenuItem::setIsSeparator(bool separator)
+{
+    m_action->setSeparator(separator);
+}
+
+void QWidgetPlatformMenuItem::setFont(const QFont &font)
+{
+    m_action->setFont(font);
+}
+
+void QWidgetPlatformMenuItem::setRole(MenuRole role)
+{
+    m_action->setMenuRole(static_cast<QAction::MenuRole>(role));
+}
+
+void QWidgetPlatformMenuItem::setCheckable(bool checkable)
+{
+    m_action->setCheckable(checkable);
+}
+
+void QWidgetPlatformMenuItem::setChecked(bool checked)
+{
+    m_action->setChecked(checked);
+}
+
+void QWidgetPlatformMenuItem::setShortcut(const QKeySequence &shortcut)
+{
+    m_action->setShortcut(shortcut);
+}
+
+void QWidgetPlatformMenuItem::setEnabled(bool enabled)
+{
+    m_action->setEnabled(enabled);
+}
+
+void QWidgetPlatformMenuItem::setIconSize(int size)
+{
+    Q_UNUSED(size);
+}
+
+QT_END_NAMESPACE
diff --git a/src/imports/platform/widgets/qwidgetplatformmenuitem_p.h b/src/imports/platform/widgets/qwidgetplatformmenuitem_p.h
new file mode 100644
index 00000000..d1a08187
--- /dev/null
+++ b/src/imports/platform/widgets/qwidgetplatformmenuitem_p.h
@@ -0,0 +1,89 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the Qt Labs Platform module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QWIDGETPLATFORMMENUITEM_P_H
+#define QWIDGETPLATFORMMENUITEM_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QtGui/qpa/qplatformmenu.h>
+
+QT_BEGIN_NAMESPACE
+
+class QAction;
+
+class QWidgetPlatformMenuItem : public QPlatformMenuItem
+{
+    Q_OBJECT
+
+public:
+    explicit QWidgetPlatformMenuItem(QObject *parent = nullptr);
+    ~QWidgetPlatformMenuItem();
+
+    QAction *action() const;
+
+    quintptr tag()const override;
+    void setTag(quintptr tag) override;
+
+    void setText(const QString &text) override;
+    void setIcon(const QIcon &icon) override;
+    void setMenu(QPlatformMenu *menu) override;
+    void setVisible(bool visible) override;
+    void setIsSeparator(bool separator) override;
+    void setFont(const QFont &font) override;
+    void setRole(MenuRole role) override;
+    void setCheckable(bool checkable) override;
+    void setChecked(bool checked) override;
+    void setShortcut(const QKeySequence& shortcut) override;
+    void setEnabled(bool enabled) override;
+    void setIconSize(int size) override;
+
+private:
+    QScopedPointer<QAction> m_action;
+};
+
+QT_END_NAMESPACE
+
+#endif // QWIDGETPLATFORMMENUITEM_P_H
diff --git a/src/imports/platform/widgets/widgets.pri b/src/imports/platform/widgets/widgets.pri
new file mode 100644
index 00000000..8759a655
--- /dev/null
+++ b/src/imports/platform/widgets/widgets.pri
@@ -0,0 +1,10 @@
+QT += widgets
+
+HEADERS += \
+    $$PWD/qwidgetplatform_p.h \
+    $$PWD/qwidgetplatformmenu_p.h \
+    $$PWD/qwidgetplatformmenuitem_p.h
+
+SOURCES += \
+    $$PWD/qwidgetplatformmenu.cpp \
+    $$PWD/qwidgetplatformmenuitem.cpp