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diff --git a/src/quick/items/qquickpalette_p.h b/src/quick/items/qquickpalette_p.h
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+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the QtQuick 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 QQUICKPALETTE_H
+#define QQUICKPALETTE_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists for the convenience
+// of QQuickPalette. This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <vector> // Workaround: I think we should include vector to qflatmap_p.h
+#include <QtCore/private/qflatmap_p.h>
+
+#include <QtQuick/private/qquickcolorgroup_p.h>
+
+QT_BEGIN_NAMESPACE
+
+class QQuickAbstractPaletteProvider;
+
+class Q_QUICK_PRIVATE_EXPORT QQuickPalette : public QQuickColorGroup
+{
+    Q_OBJECT
+
+    Q_PROPERTY(QQuickColorGroup *active READ active WRITE setActive NOTIFY activeChanged)
+    Q_PROPERTY(QQuickColorGroup *inactive READ inactive WRITE setInactive NOTIFY inactiveChanged)
+    Q_PROPERTY(QQuickColorGroup *disabled READ disabled WRITE setDisabled NOTIFY disabledChanged)
+
+    QML_NAMED_ELEMENT(Palette)
+    QML_ADDED_IN_VERSION(6, 0)
+
+public: // Types
+    using PalettePtr = QPointer<QQuickPalette>;
+
+public:
+    Q_DISABLE_COPY_MOVE(QQuickPalette)
+    explicit QQuickPalette(QObject *parent = nullptr);
+
+    QQuickColorGroup *active() const;
+    QQuickColorGroup *inactive() const;
+    QQuickColorGroup *disabled() const;
+
+    QPalette::ColorGroup currentColorGroup() const;
+    void setCurrentGroup(QPalette::ColorGroup currentGroup);
+
+    void fromQPalette(QPalette palette);
+    QPalette toQPalette() const;
+
+    const QQuickAbstractPaletteProvider *paletteProvider() const;
+    void setPaletteProvider(const QQuickAbstractPaletteProvider *paletteProvider);
+
+    void reset();
+
+    void inheritPalette(const QPalette &palette);
+
+public Q_SLOTS:
+    void setActive(QQuickColorGroup *active);
+    void setInactive(QQuickColorGroup *inactive);
+    void setDisabled(QQuickColorGroup *disabled);
+
+Q_SIGNALS:
+    void activeChanged();
+    void inactiveChanged();
+    void disabledChanged();
+
+private:
+    void setColorGroup(QPalette::ColorGroup groupTag,
+                       const QQuickColorGroup::GroupPtr &group,
+                       void (QQuickPalette::*notifier)());
+    QQuickColorGroup::GroupPtr colorGroup(QPalette::ColorGroup groupTag) const;
+    QQuickColorGroup::GroupPtr findColorGroup(QPalette::ColorGroup groupTag) const;
+
+    void registerColorGroup(QQuickColorGroup *group, QPalette::ColorGroup groupTag);
+
+    bool isValidColorGroup(QPalette::ColorGroup groupTag,
+                           const QQuickColorGroup::GroupPtr &colorGroup) const;
+
+    static constexpr QPalette::ColorGroup defaultCurrentGroup() { return QPalette::Active; }
+
+private:
+    QFlatMap<QPalette::ColorGroup, QQuickColorGroup::GroupPtr> m_colorGroups;
+    QPalette::ColorGroup m_currentGroup;
+};
+
+QT_END_NAMESPACE
+
+QML_DECLARE_TYPE(QQuickPalette)
+
+#endif // QQUICKPALETTE_H