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 // Copyright (C) 2020 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
 #ifndef QSTYLEOPTION_H
 #define QSTYLEOPTION_H
 
 #include <QtWidgets/qtwidgetsglobal.h>
 #include <QtCore/qlocale.h>
 #include <QtCore/qvariant.h>
 #if QT_CONFIG(spinbox)
 #include <QtWidgets/qabstractspinbox.h>
 #endif
 #include <QtGui/qicon.h>
 #include <QtGui/qtransform.h>
 #if QT_CONFIG(slider)
 #include <QtWidgets/qslider.h>
 #endif
 #include <QtWidgets/qstyle.h>
 #if QT_CONFIG(tabbar)
 #include <QtWidgets/qtabbar.h>
 #endif
 #if QT_CONFIG(tabwidget)
 #include <QtWidgets/qtabwidget.h>
 #endif
 #if QT_CONFIG(rubberband)
 #include <QtWidgets/qrubberband.h>
 #endif
 #include <QtWidgets/qframe.h>
 #if QT_CONFIG(itemviews)
 #   include <QtCore/qabstractitemmodel.h>
 #endif
 
 QT_BEGIN_NAMESPACE
 
 
 class QDebug;
 
 class Q_WIDGETS_EXPORT QStyleOption
 {
 public:
     enum OptionType {
                       SO_Default, SO_FocusRect, SO_Button, SO_Tab, SO_MenuItem,
                       SO_Frame, SO_ProgressBar, SO_ToolBox, SO_Header,
                       SO_DockWidget, SO_ViewItem, SO_TabWidgetFrame,
                       SO_TabBarBase, SO_RubberBand, SO_ToolBar, SO_GraphicsItem,
 
                       SO_Complex = 0xf0000, SO_Slider, SO_SpinBox, SO_ToolButton, SO_ComboBox,
                       SO_TitleBar, SO_GroupBox, SO_SizeGrip,
 
                       SO_CustomBase = 0xf00,
                       SO_ComplexCustomBase = 0xf000000
                     };
 
     enum StyleOptionType { Type = SO_Default };
     enum StyleOptionVersion { Version = 1 };
 
     int version;
     int type;
     QStyle::State state;
     Qt::LayoutDirection direction;
     QRect rect;
     QFontMetrics fontMetrics;
     QPalette palette;
     QObject *styleObject;
 
     QStyleOption(int version = QStyleOption::Version, int type = SO_Default);
     QStyleOption(const QStyleOption &other);
     ~QStyleOption();
 
     void initFrom(const QWidget *w);
     QStyleOption &operator=(const QStyleOption &other);
 };
 
 class Q_WIDGETS_EXPORT QStyleOptionFocusRect : public QStyleOption
 {
 public:
     enum StyleOptionType { Type = SO_FocusRect };
     enum StyleOptionVersion { Version = 1 };
 
     QColor backgroundColor;
 
     QStyleOptionFocusRect();
     QStyleOptionFocusRect(const QStyleOptionFocusRect &other) : QStyleOption(Version, Type) { *this = other; }
     QStyleOptionFocusRect &operator=(const QStyleOptionFocusRect &) = default;
 
 protected:
     QStyleOptionFocusRect(int version);
 };
 
 class Q_WIDGETS_EXPORT QStyleOptionFrame : public QStyleOption
 {
 public:
     enum StyleOptionType { Type = SO_Frame };
     enum StyleOptionVersion { Version = 1 };
 
     int lineWidth;
     int midLineWidth;
     enum FrameFeature {
         None = 0x00,
         Flat = 0x01,
         Rounded = 0x02
     };
     Q_DECLARE_FLAGS(FrameFeatures, FrameFeature)
     FrameFeatures features;
     QFrame::Shape frameShape;
 
     QStyleOptionFrame();
     QStyleOptionFrame(const QStyleOptionFrame &other) : QStyleOption(Version, Type) { *this = other; }
     QStyleOptionFrame &operator=(const QStyleOptionFrame &) = default;
 
 protected:
     QStyleOptionFrame(int version);
 };
 
 Q_DECLARE_OPERATORS_FOR_FLAGS(QStyleOptionFrame::FrameFeatures)
 
 #if QT_CONFIG(tabwidget)
 class Q_WIDGETS_EXPORT QStyleOptionTabWidgetFrame : public QStyleOption
 {
 public:
     enum StyleOptionType { Type = SO_TabWidgetFrame };
     enum StyleOptionVersion { Version = 1 };
 
     int lineWidth;
     int midLineWidth;
     QTabBar::Shape shape;
     QSize tabBarSize;
     QSize rightCornerWidgetSize;
     QSize leftCornerWidgetSize;
     QRect tabBarRect;
     QRect selectedTabRect;
 
     QStyleOptionTabWidgetFrame();
     inline QStyleOptionTabWidgetFrame(const QStyleOptionTabWidgetFrame &other)
         : QStyleOption(Version, Type) { *this = other; }
     QStyleOptionTabWidgetFrame &operator=(const QStyleOptionTabWidgetFrame &) = default;
 
 protected:
     QStyleOptionTabWidgetFrame(int version);
 };
 
 #endif // QT_CONFIG(tabwidget)
 
 
 #if QT_CONFIG(tabbar)
 class Q_WIDGETS_EXPORT QStyleOptionTabBarBase : public QStyleOption
 {
 public:
     enum StyleOptionType { Type = SO_TabBarBase };
     enum StyleOptionVersion { Version = 1 };
 
     QTabBar::Shape shape;
     QRect tabBarRect;
     QRect selectedTabRect;
     bool documentMode;
 
     QStyleOptionTabBarBase();
     QStyleOptionTabBarBase(const QStyleOptionTabBarBase &other) : QStyleOption(Version, Type) { *this = other; }
     QStyleOptionTabBarBase &operator=(const QStyleOptionTabBarBase &) = default;
 
 protected:
     QStyleOptionTabBarBase(int version);
 };
 
 #endif // QT_CONFIG(tabbar)
 
 class Q_WIDGETS_EXPORT QStyleOptionHeader : public QStyleOption
 {
 public:
     enum StyleOptionType { Type = SO_Header };
     enum StyleOptionVersion { Version = 1 };
 
     enum SectionPosition { Beginning, Middle, End, OnlyOneSection };
     enum SelectedPosition { NotAdjacent, NextIsSelected, PreviousIsSelected,
                             NextAndPreviousAreSelected };
     enum SortIndicator { None, SortUp, SortDown };
 
     int section;
     QString text;
     Qt::Alignment textAlignment;
     QIcon icon;
     Qt::Alignment iconAlignment;
     SectionPosition position;
     SelectedPosition selectedPosition;
     SortIndicator sortIndicator;
     Qt::Orientation orientation;
 
     QStyleOptionHeader();
     QStyleOptionHeader(const QStyleOptionHeader &other) : QStyleOption(Version, Type) { *this = other; }
     QStyleOptionHeader &operator=(const QStyleOptionHeader &) = default;
 
 protected:
     QStyleOptionHeader(int version);
 };
 
 // ### Qt7: merge with QStyleOptionHeader
 class Q_WIDGETS_EXPORT QStyleOptionHeaderV2 : public QStyleOptionHeader
 {
 public:
     enum StyleOptionType { Type = SO_Header };
     enum StyleOptionVersion { Version = 2 };
 
     QStyleOptionHeaderV2();
     QStyleOptionHeaderV2(const QStyleOptionHeaderV2 &other) : QStyleOptionHeader(Version) { *this = other; }
     QStyleOptionHeaderV2 &operator=(const QStyleOptionHeaderV2 &) = default;
 
     Qt::TextElideMode textElideMode:2;
     bool isSectionDragTarget:1;
     int unused:29;
 
 protected:
     QStyleOptionHeaderV2(int version);
 };
 
 class Q_WIDGETS_EXPORT QStyleOptionButton : public QStyleOption
 {
 public:
     enum StyleOptionType { Type = SO_Button };
     enum StyleOptionVersion { Version = 1 };
 
     enum ButtonFeature { None = 0x00, Flat = 0x01, HasMenu = 0x02, DefaultButton = 0x04,
                          AutoDefaultButton = 0x08, CommandLinkButton = 0x10  };
     Q_DECLARE_FLAGS(ButtonFeatures, ButtonFeature)
 
     ButtonFeatures features;
     QString text;
     QIcon icon;
     QSize iconSize;
 
     QStyleOptionButton();
     QStyleOptionButton(const QStyleOptionButton &other) : QStyleOption(Version, Type) { *this = other; }
     QStyleOptionButton &operator=(const QStyleOptionButton &) = default;
 
 protected:
     QStyleOptionButton(int version);
 };
 
 Q_DECLARE_OPERATORS_FOR_FLAGS(QStyleOptionButton::ButtonFeatures)
 
 #if QT_CONFIG(tabbar)
 class Q_WIDGETS_EXPORT QStyleOptionTab : public QStyleOption
 {
 public:
     enum StyleOptionType { Type = SO_Tab };
     enum StyleOptionVersion { Version = 1 };
 
     enum TabPosition { Beginning, Middle, End, OnlyOneTab, Moving };
     enum SelectedPosition { NotAdjacent, NextIsSelected, PreviousIsSelected };
     enum CornerWidget { NoCornerWidgets = 0x00, LeftCornerWidget = 0x01,
                         RightCornerWidget = 0x02 };
     enum TabFeature { None = 0x00, HasFrame = 0x01, MinimumSizeHint = 0x02 };
     Q_DECLARE_FLAGS(CornerWidgets, CornerWidget)
     Q_DECLARE_FLAGS(TabFeatures, TabFeature)
 
     QTabBar::Shape shape;
     QString text;
     QIcon icon;
     int row;
     TabPosition position;
     SelectedPosition selectedPosition;
     CornerWidgets cornerWidgets;
     QSize iconSize;
     bool documentMode;
     QSize leftButtonSize;
     QSize rightButtonSize;
     TabFeatures features;
     int tabIndex = -1;
 
     QStyleOptionTab();
     QStyleOptionTab(const QStyleOptionTab &other) : QStyleOption(Version, Type) { *this = other; }
     QStyleOptionTab &operator=(const QStyleOptionTab &) = default;
 
 protected:
     QStyleOptionTab(int version);
 };
 
 Q_DECLARE_OPERATORS_FOR_FLAGS(QStyleOptionTab::CornerWidgets)
 
 #endif // QT_CONFIG(tabbar)
 
 
 #if QT_CONFIG(toolbar)
 
 class Q_WIDGETS_EXPORT QStyleOptionToolBar : public QStyleOption
 {
 public:
     enum StyleOptionType { Type = SO_ToolBar };
     enum StyleOptionVersion { Version = 1 };
     enum ToolBarPosition { Beginning, Middle, End, OnlyOne };
     enum ToolBarFeature { None = 0x0, Movable = 0x1 };
     Q_DECLARE_FLAGS(ToolBarFeatures, ToolBarFeature)
     ToolBarPosition positionOfLine; // The toolbar line position
     ToolBarPosition positionWithinLine; // The position within a toolbar
     Qt::ToolBarArea toolBarArea; // The toolbar docking area
     ToolBarFeatures features;
     int lineWidth;
     int midLineWidth;
     QStyleOptionToolBar();
     QStyleOptionToolBar(const QStyleOptionToolBar &other) : QStyleOption(Version, Type) { *this = other; }
     QStyleOptionToolBar &operator=(const QStyleOptionToolBar &) = default;
 
 protected:
     QStyleOptionToolBar(int version);
 };
 
 Q_DECLARE_OPERATORS_FOR_FLAGS(QStyleOptionToolBar::ToolBarFeatures)
 
 #endif // QT_CONFIG(toolbar)
 
 class Q_WIDGETS_EXPORT QStyleOptionProgressBar : public QStyleOption
 {
 public:
     enum StyleOptionType { Type = SO_ProgressBar };
     enum StyleOptionVersion { Version = 1 };
 
     int minimum;
     int maximum;
     int progress;
     QString text;
     Qt::Alignment textAlignment;
     bool textVisible;
     bool invertedAppearance;
     bool bottomToTop;
 
     QStyleOptionProgressBar();
     QStyleOptionProgressBar(const QStyleOptionProgressBar &other) : QStyleOption(Version, Type) { *this = other; }
     QStyleOptionProgressBar &operator=(const QStyleOptionProgressBar &) = default;
 
 protected:
     QStyleOptionProgressBar(int version);
 };
 
 class Q_WIDGETS_EXPORT QStyleOptionMenuItem : public QStyleOption
 {
 public:
     enum StyleOptionType { Type = SO_MenuItem };
     enum StyleOptionVersion { Version = 1 };
 
     enum MenuItemType { Normal, DefaultItem, Separator, SubMenu, Scroller, TearOff, Margin,
                         EmptyArea };
     enum CheckType { NotCheckable, Exclusive, NonExclusive };
 
     MenuItemType menuItemType;
     CheckType checkType;
     bool checked;
     bool menuHasCheckableItems;
     QRect menuRect;
     QString text;
     QIcon icon;
     int maxIconWidth;
     int reservedShortcutWidth;
     QFont font;
 
     QStyleOptionMenuItem();
     QStyleOptionMenuItem(const QStyleOptionMenuItem &other) : QStyleOption(Version, Type) { *this = other; }
     QStyleOptionMenuItem &operator=(const QStyleOptionMenuItem &) = default;
 
 protected:
     QStyleOptionMenuItem(int version);
 };
 
 class Q_WIDGETS_EXPORT QStyleOptionDockWidget : public QStyleOption
 {
 public:
     enum StyleOptionType { Type = SO_DockWidget };
     enum StyleOptionVersion { Version = 1 };
 
     QString title;
     bool closable;
     bool movable;
     bool floatable;
     bool verticalTitleBar;
 
     QStyleOptionDockWidget();
     QStyleOptionDockWidget(const QStyleOptionDockWidget &other) : QStyleOption(Version, Type) { *this = other; }
     QStyleOptionDockWidget &operator=(const QStyleOptionDockWidget &) = default;
 
 protected:
     QStyleOptionDockWidget(int version);
 };
 
 #if QT_CONFIG(itemviews)
 
 class Q_WIDGETS_EXPORT QStyleOptionViewItem : public QStyleOption
 {
 public:
     enum StyleOptionType { Type = SO_ViewItem };
     enum StyleOptionVersion { Version = 1 };
 
     enum Position { Left, Right, Top, Bottom };
 
     Qt::Alignment displayAlignment;
     Qt::Alignment decorationAlignment;
     Qt::TextElideMode textElideMode;
     Position decorationPosition;
     QSize decorationSize;
     QFont font;
     bool showDecorationSelected;
 
     enum ViewItemFeature {
         None = 0x00,
         WrapText = 0x01,
         Alternate = 0x02,
         HasCheckIndicator = 0x04,
         HasDisplay = 0x08,
         HasDecoration = 0x10,
         IsDecoratedRootColumn = 0x20,
         IsDecorationForRootColumn = 0x40,
     };
     Q_DECLARE_FLAGS(ViewItemFeatures, ViewItemFeature)
 
     ViewItemFeatures features;
 
     QLocale locale;
     const QWidget *widget;
 
     enum ViewItemPosition { Invalid, Beginning, Middle, End, OnlyOne };
 
     QModelIndex index;
     Qt::CheckState checkState;
     QIcon icon;
     QString text;
     ViewItemPosition viewItemPosition;
     QBrush backgroundBrush;
 
     QStyleOptionViewItem();
     QStyleOptionViewItem(const QStyleOptionViewItem &other) : QStyleOption(Version, Type) { *this = other; }
     QStyleOptionViewItem &operator=(const QStyleOptionViewItem &) = default;
 
 protected:
     QStyleOptionViewItem(int version);
 };
 
 Q_DECLARE_OPERATORS_FOR_FLAGS(QStyleOptionViewItem::ViewItemFeatures)
 
 #endif // QT_CONFIG(itemviews)
 
 class Q_WIDGETS_EXPORT QStyleOptionToolBox : public QStyleOption
 {
 public:
     enum StyleOptionType { Type = SO_ToolBox };
     enum StyleOptionVersion { Version = 1 };
 
     QString text;
     QIcon icon;
 
     enum TabPosition { Beginning, Middle, End, OnlyOneTab };
     enum SelectedPosition { NotAdjacent, NextIsSelected, PreviousIsSelected };
 
     TabPosition position;
     SelectedPosition selectedPosition;
 
     QStyleOptionToolBox();
     QStyleOptionToolBox(const QStyleOptionToolBox &other) : QStyleOption(Version, Type) { *this = other; }
     QStyleOptionToolBox &operator=(const QStyleOptionToolBox &) = default;
 
 protected:
     QStyleOptionToolBox(int version);
 };
 
 #if QT_CONFIG(rubberband)
 class Q_WIDGETS_EXPORT QStyleOptionRubberBand : public QStyleOption
 {
 public:
     enum StyleOptionType { Type = SO_RubberBand };
     enum StyleOptionVersion { Version = 1 };
 
     QRubberBand::Shape shape;
     bool opaque;
 
     QStyleOptionRubberBand();
     QStyleOptionRubberBand(const QStyleOptionRubberBand &other) : QStyleOption(Version, Type) { *this = other; }
     QStyleOptionRubberBand &operator=(const QStyleOptionRubberBand &) = default;
 
 protected:
     QStyleOptionRubberBand(int version);
 };
 #endif // QT_CONFIG(rubberband)
 
 // -------------------------- Complex style options -------------------------------
 class Q_WIDGETS_EXPORT QStyleOptionComplex : public QStyleOption
 {
 public:
     enum StyleOptionType { Type = SO_Complex };
     enum StyleOptionVersion { Version = 1 };
 
     QStyle::SubControls subControls;
     QStyle::SubControls activeSubControls;
 
     QStyleOptionComplex(int version = QStyleOptionComplex::Version, int type = SO_Complex);
     QStyleOptionComplex(const QStyleOptionComplex &other) : QStyleOption(Version, Type) { *this = other; }
     QStyleOptionComplex &operator=(const QStyleOptionComplex &) = default;
 };
 
 #if QT_CONFIG(slider)
 class Q_WIDGETS_EXPORT QStyleOptionSlider : public QStyleOptionComplex
 {
 public:
     enum StyleOptionType { Type = SO_Slider };
     enum StyleOptionVersion { Version = 1 };
 
     Qt::Orientation orientation;
     int minimum;
     int maximum;
     QSlider::TickPosition tickPosition;
     int tickInterval;
     bool upsideDown;
     int sliderPosition;
     int sliderValue;
     int singleStep;
     int pageStep;
     qreal notchTarget;
     bool dialWrapping;
     Qt::KeyboardModifiers keyboardModifiers;
 
     QStyleOptionSlider();
     QStyleOptionSlider(const QStyleOptionSlider &other) : QStyleOptionComplex(Version, Type) { *this = other; }
     QStyleOptionSlider &operator=(const QStyleOptionSlider &) = default;
 
 protected:
     QStyleOptionSlider(int version);
 };
 #endif // QT_CONFIG(slider)
 
 #if QT_CONFIG(spinbox)
 class Q_WIDGETS_EXPORT QStyleOptionSpinBox : public QStyleOptionComplex
 {
 public:
     enum StyleOptionType { Type = SO_SpinBox };
     enum StyleOptionVersion { Version = 1 };
 
     QAbstractSpinBox::ButtonSymbols buttonSymbols;
     QAbstractSpinBox::StepEnabled stepEnabled;
     bool frame;
 
     QStyleOptionSpinBox();
     QStyleOptionSpinBox(const QStyleOptionSpinBox &other) : QStyleOptionComplex(Version, Type) { *this = other; }
     QStyleOptionSpinBox &operator=(const QStyleOptionSpinBox &) = default;
 
 protected:
     QStyleOptionSpinBox(int version);
 };
 #endif // QT_CONFIG(spinbox)
 
 #if QT_CONFIG(toolbutton)
 class Q_WIDGETS_EXPORT QStyleOptionToolButton : public QStyleOptionComplex
 {
 public:
     enum StyleOptionType { Type = SO_ToolButton };
     enum StyleOptionVersion { Version = 1 };
 
     enum ToolButtonFeature { None = 0x00, Arrow = 0x01, Menu = 0x04, MenuButtonPopup = Menu, PopupDelay = 0x08,
                              HasMenu = 0x10 };
     Q_DECLARE_FLAGS(ToolButtonFeatures, ToolButtonFeature)
 
     ToolButtonFeatures features;
     QIcon icon;
     QSize iconSize;
     QString text;
     Qt::ArrowType arrowType;
     Qt::ToolButtonStyle toolButtonStyle;
     QPoint pos;
     QFont font;
 
     QStyleOptionToolButton();
     QStyleOptionToolButton(const QStyleOptionToolButton &other) : QStyleOptionComplex(Version, Type) { *this = other; }
     QStyleOptionToolButton &operator=(const QStyleOptionToolButton &) = default;
 
 protected:
     QStyleOptionToolButton(int version);
 };
 
 Q_DECLARE_OPERATORS_FOR_FLAGS(QStyleOptionToolButton::ToolButtonFeatures)
 #endif  // QT_CONFIG(toolbutton)
 
 class Q_WIDGETS_EXPORT QStyleOptionComboBox : public QStyleOptionComplex
 {
 public:
     enum StyleOptionType { Type = SO_ComboBox };
     enum StyleOptionVersion { Version = 1 };
 
     bool editable;
     QRect popupRect;
     bool frame;
     QString currentText;
     QIcon currentIcon;
     QSize iconSize;
     Qt::Alignment textAlignment = Qt::AlignLeft | Qt::AlignVCenter;
 
     QStyleOptionComboBox();
     QStyleOptionComboBox(const QStyleOptionComboBox &other) : QStyleOptionComplex(Version, Type) { *this = other; }
     QStyleOptionComboBox &operator=(const QStyleOptionComboBox &) = default;
 
 protected:
     QStyleOptionComboBox(int version);
 };
 
 class Q_WIDGETS_EXPORT QStyleOptionTitleBar : public QStyleOptionComplex
 {
 public:
     enum StyleOptionType { Type = SO_TitleBar };
     enum StyleOptionVersion { Version = 1 };
 
     QString text;
     QIcon icon;
     int titleBarState;
     Qt::WindowFlags titleBarFlags;
 
     QStyleOptionTitleBar();
     QStyleOptionTitleBar(const QStyleOptionTitleBar &other) : QStyleOptionComplex(Version, Type) { *this = other; }
     QStyleOptionTitleBar &operator=(const QStyleOptionTitleBar &) = default;
 
 protected:
     QStyleOptionTitleBar(int version);
 };
 
 class Q_WIDGETS_EXPORT QStyleOptionGroupBox : public QStyleOptionComplex
 {
 public:
     enum StyleOptionType { Type = SO_GroupBox };
     enum StyleOptionVersion { Version = 1 };
 
     QStyleOptionFrame::FrameFeatures features;
     QString text;
     Qt::Alignment textAlignment;
     QColor textColor;
     int lineWidth;
     int midLineWidth;
 
     QStyleOptionGroupBox();
     QStyleOptionGroupBox(const QStyleOptionGroupBox &other) : QStyleOptionComplex(Version, Type) { *this = other; }
     QStyleOptionGroupBox &operator=(const QStyleOptionGroupBox &) = default;
 protected:
     QStyleOptionGroupBox(int version);
 };
 
 class Q_WIDGETS_EXPORT QStyleOptionSizeGrip : public QStyleOptionComplex
 {
 public:
     enum StyleOptionType { Type = SO_SizeGrip };
     enum StyleOptionVersion { Version = 1 };
 
     Qt::Corner corner;
 
     QStyleOptionSizeGrip();
     QStyleOptionSizeGrip(const QStyleOptionSizeGrip &other) : QStyleOptionComplex(Version, Type) { *this = other; }
     QStyleOptionSizeGrip &operator=(const QStyleOptionSizeGrip &) = default;
 protected:
     QStyleOptionSizeGrip(int version);
 };
 
 class Q_WIDGETS_EXPORT QStyleOptionGraphicsItem : public QStyleOption
 {
 public:
     enum StyleOptionType { Type = SO_GraphicsItem };
     enum StyleOptionVersion { Version = 1 };
 
     QRectF exposedRect;
 
     QStyleOptionGraphicsItem();
     QStyleOptionGraphicsItem(const QStyleOptionGraphicsItem &other) : QStyleOption(Version, Type) { *this = other; }
     QStyleOptionGraphicsItem &operator=(const QStyleOptionGraphicsItem &) = default;
     static qreal levelOfDetailFromTransform(const QTransform &worldTransform);
 protected:
     QStyleOptionGraphicsItem(int version);
 };
 
 template <typename T>
 T qstyleoption_cast(const QStyleOption *opt)
 {
     typedef typename std::remove_cv<typename std::remove_pointer<T>::type>::type Opt;
     if (opt && opt->version >= Opt::Version && (opt->type == Opt::Type
         || int(Opt::Type) == QStyleOption::SO_Default
         || (int(Opt::Type) == QStyleOption::SO_Complex
             && opt->type > QStyleOption::SO_Complex)))
         return static_cast<T>(opt);
     return nullptr;
 }
 
 template <typename T>
 T qstyleoption_cast(QStyleOption *opt)
 {
     typedef typename std::remove_cv<typename std::remove_pointer<T>::type>::type Opt;
     if (opt && opt->version >= Opt::Version && (opt->type == Opt::Type
         || int(Opt::Type) == QStyleOption::SO_Default
         || (int(Opt::Type) == QStyleOption::SO_Complex
             && opt->type > QStyleOption::SO_Complex)))
         return static_cast<T>(opt);
     return nullptr;
 }
 
 // -------------------------- QStyleHintReturn -------------------------------
 class Q_WIDGETS_EXPORT QStyleHintReturn {
 public:
     enum HintReturnType {
         SH_Default=0xf000, SH_Mask, SH_Variant
     };
 
     enum StyleOptionType { Type = SH_Default };
     enum StyleOptionVersion { Version = 1 };
 
     QStyleHintReturn(int version = QStyleOption::Version, int type = SH_Default);
     ~QStyleHintReturn();
 
     int version;
     int type;
 };
 
 class Q_WIDGETS_EXPORT QStyleHintReturnMask : public QStyleHintReturn {
 public:
     enum StyleOptionType { Type = SH_Mask };
     enum StyleOptionVersion { Version = 1 };
 
     QStyleHintReturnMask();
     ~QStyleHintReturnMask();
 
     QRegion region;
 };
 
 class Q_WIDGETS_EXPORT QStyleHintReturnVariant : public QStyleHintReturn {
 public:
     enum StyleOptionType { Type = SH_Variant };
     enum StyleOptionVersion { Version = 1 };
 
     QStyleHintReturnVariant();
     ~QStyleHintReturnVariant();
 
     QVariant variant;
 };
 
 template <typename T>
 T qstyleoption_cast(const QStyleHintReturn *hint)
 {
     typedef typename std::remove_cv<typename std::remove_pointer<T>::type>::type Opt;
     if (hint && hint->version <= Opt::Version &&
         (hint->type == Opt::Type || int(Opt::Type) == QStyleHintReturn::SH_Default))
         return static_cast<T>(hint);
     return nullptr;
 }
 
 template <typename T>
 T qstyleoption_cast(QStyleHintReturn *hint)
 {
     typedef typename std::remove_cv<typename std::remove_pointer<T>::type>::type Opt;
     if (hint && hint->version <= Opt::Version &&
         (hint->type == Opt::Type || int(Opt::Type) == QStyleHintReturn::SH_Default))
         return static_cast<T>(hint);
     return nullptr;
 }
 
 #if !defined(QT_NO_DEBUG_STREAM)
 Q_WIDGETS_EXPORT QDebug operator<<(QDebug debug, const QStyleOption::OptionType &optionType);
 Q_WIDGETS_EXPORT QDebug operator<<(QDebug debug, const QStyleOption &option);
 #endif
 
 QT_END_NAMESPACE
 
 #endif // QSTYLEOPTION_H

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