Long live Qt!

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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 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 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qstyleoption.h"
+#include "qapplication.h"
+#ifdef Q_WS_MAC
+# include "private/qt_mac_p.h"
+# include "qmacstyle_mac.h"
+#endif
+#ifndef QT_NO_DEBUG
+#include <qdebug.h>
+#endif
+
+QT_BEGIN_NAMESPACE
+
+/*!
+    \class QStyleOption
+    \brief The QStyleOption class stores the parameters used by QStyle functions.
+
+    \ingroup appearance
+
+    QStyleOption and its subclasses contain all the information that
+    QStyle functions need to draw a graphical element.
+
+    For performance reasons, there are few member functions and the
+    access to the member variables is direct (i.e., using the \c . or
+    \c -> operator). This low-level feel makes the structures
+    straightforward to use and emphasizes that these are simply
+    parameters used by the style functions.
+
+    The caller of a QStyle function usually creates QStyleOption
+    objects on the stack. This combined with Qt's extensive use of
+    \l{implicit sharing} for types such as QString, QPalette, and
+    QColor ensures that no memory allocation needlessly takes place.
+
+    The following code snippet shows how to use a specific
+    QStyleOption subclass to paint a push button:
+
+    \snippet doc/src/snippets/qstyleoption/main.cpp 0
+
+    In our example, the control is a QStyle::CE_PushButton, and
+    according to the QStyle::drawControl() documentation the
+    corresponding class is QStyleOptionButton.
+
+    When reimplementing QStyle functions that take a QStyleOption
+    parameter, you often need to cast the QStyleOption to a subclass.
+    For safety, you can use qstyleoption_cast() to ensure that the
+    pointer type is correct. For example:
+
+    \snippet doc/src/snippets/qstyleoption/main.cpp 4
+
+    The qstyleoption_cast() function will return 0 if the object to
+    which \c option points is not of the correct type.
+
+    For an example demonstrating how style options can be used, see
+    the \l {widgets/styles}{Styles} example.
+
+    \sa QStyle, QStylePainter
+*/
+
+/*!
+    \enum QStyleOption::OptionType
+
+    This enum is used internally by QStyleOption, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleOption subclass and your own styles.
+
+    \value SO_Button \l QStyleOptionButton
+    \value SO_ComboBox \l QStyleOptionComboBox
+    \value SO_Complex \l QStyleOptionComplex
+    \value SO_Default QStyleOption
+    \value SO_DockWidget \l QStyleOptionDockWidget
+    \value SO_FocusRect \l QStyleOptionFocusRect
+    \value SO_Frame \l QStyleOptionFrame \l QStyleOptionFrameV2
+    \value SO_GraphicsItem \l QStyleOptionGraphicsItem
+    \value SO_GroupBox \l QStyleOptionGroupBox
+    \value SO_Header \l QStyleOptionHeader
+    \value SO_MenuItem \l QStyleOptionMenuItem
+    \value SO_ProgressBar \l QStyleOptionProgressBar \l QStyleOptionProgressBarV2
+    \value SO_RubberBand \l QStyleOptionRubberBand
+    \value SO_SizeGrip \l QStyleOptionSizeGrip
+    \value SO_Slider \l QStyleOptionSlider
+    \value SO_SpinBox \l QStyleOptionSpinBox
+    \value SO_Tab \l QStyleOptionTab
+    \value SO_TabBarBase \l QStyleOptionTabBarBase
+    \value SO_TabWidgetFrame \l QStyleOptionTabWidgetFrame
+    \value SO_TitleBar \l QStyleOptionTitleBar
+    \value SO_ToolBar \l QStyleOptionToolBar
+    \value SO_ToolBox \l QStyleOptionToolBox
+    \value SO_ToolButton \l QStyleOptionToolButton
+    \value SO_ViewItem \l QStyleOptionViewItem (used in Interviews)
+
+    The following values are used for custom controls:
+
+    \value SO_CustomBase Reserved for custom QStyleOptions;
+                         all custom controls values must be above this value
+    \value SO_ComplexCustomBase Reserved for custom QStyleOptions;
+                         all custom complex controls values must be above this value
+
+    Some style options are defined for various Qt3Support controls:
+
+    \value SO_Q3DockWindow \l QStyleOptionQ3DockWindow
+    \value SO_Q3ListView \l QStyleOptionQ3ListView
+    \value SO_Q3ListViewItem \l QStyleOptionQ3ListViewItem
+
+    \sa type
+*/
+
+/*!
+    Constructs a QStyleOption with the specified \a version and \a
+    type.
+
+    The version has no special meaning for QStyleOption; it can be
+    used by subclasses to distinguish between different version of
+    the same option type.
+
+    The \l state member variable is initialized to
+    QStyle::State_None.
+
+    \sa version, type
+*/
+
+QStyleOption::QStyleOption(int version, int type)
+    : version(version), type(type), state(QStyle::State_None),
+      direction(QApplication::layoutDirection()), fontMetrics(QFont())
+{
+}
+
+
+/*!
+    Destroys this style option object.
+*/
+QStyleOption::~QStyleOption()
+{
+}
+
+/*!
+    \fn void QStyleOption::initFrom(const QWidget *widget)
+    \since 4.1
+
+    Initializes the \l state, \l direction, \l rect, \l palette, and
+    \l fontMetrics member variables based on the specified \a widget.
+
+    This is a convenience function; the member variables can also be
+    initialized manually.
+
+    \sa QWidget::layoutDirection(), QWidget::rect(),
+        QWidget::palette(), QWidget::fontMetrics()
+*/
+
+/*!
+    \obsolete
+
+    Use initFrom(\a widget) instead.
+*/
+void QStyleOption::init(const QWidget *widget)
+{
+    QWidget *window = widget->window();
+    state = QStyle::State_None;
+    if (widget->isEnabled())
+        state |= QStyle::State_Enabled;
+    if (widget->hasFocus())
+        state |= QStyle::State_HasFocus;
+    if (window->testAttribute(Qt::WA_KeyboardFocusChange))
+        state |= QStyle::State_KeyboardFocusChange;
+    if (widget->underMouse())
+        state |= QStyle::State_MouseOver;
+    if (window->isActiveWindow())
+        state |= QStyle::State_Active;
+    if (widget->isWindow())
+        state |= QStyle::State_Window;
+#ifdef Q_WS_MAC
+    extern bool qt_mac_can_clickThrough(const QWidget *w); //qwidget_mac.cpp
+    if (!(state & QStyle::State_Active) && !qt_mac_can_clickThrough(widget))
+        state &= ~QStyle::State_Enabled;
+
+    switch (QMacStyle::widgetSizePolicy(widget)) {
+    case QMacStyle::SizeSmall:
+        state |= QStyle::State_Small;
+        break;
+    case QMacStyle::SizeMini:
+        state |= QStyle::State_Mini;
+        break;
+    default:
+        ;
+    }
+#endif
+#ifdef QT_KEYPAD_NAVIGATION
+    if (widget->hasEditFocus())
+        state |= QStyle::State_HasEditFocus;
+#endif
+
+    direction = widget->layoutDirection();
+    rect = widget->rect();
+    palette = widget->palette();
+    fontMetrics = widget->fontMetrics();
+}
+
+/*!
+   Constructs a copy of \a other.
+*/
+QStyleOption::QStyleOption(const QStyleOption &other)
+    : version(Version), type(Type), state(other.state),
+      direction(other.direction), rect(other.rect), fontMetrics(other.fontMetrics),
+      palette(other.palette)
+{
+}
+
+/*!
+    Assign \a other to this QStyleOption.
+*/
+QStyleOption &QStyleOption::operator=(const QStyleOption &other)
+{
+    state = other.state;
+    direction = other.direction;
+    rect = other.rect;
+    fontMetrics = other.fontMetrics;
+    palette = other.palette;
+    return *this;
+}
+
+/*!
+    \enum QStyleOption::StyleOptionType
+
+    This enum is used to hold information about the type of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Type The type of style option provided (\l{SO_Default} for
+           this class).
+
+    The type is used internally by QStyleOption, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleOption subclass and your own styles.
+
+    \sa StyleOptionVersion
+*/
+
+/*!
+    \enum QStyleOption::StyleOptionVersion
+
+    This enum is used to hold information about the version of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Version 1
+
+    The version is used by QStyleOption subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+/*!
+    \variable QStyleOption::palette
+    \brief the palette that should be used when painting the control
+
+    By default, the application's default palette is used.
+
+    \sa initFrom()
+*/
+
+/*!
+    \variable QStyleOption::direction
+    \brief the text layout direction that should be used when drawing text in the control
+
+    By default, the layout direction is Qt::LeftToRight.
+
+    \sa initFrom()
+*/
+
+/*!
+    \variable QStyleOption::fontMetrics
+    \brief the font metrics that should be used when drawing text in the control
+
+    By default, the application's default font is used.
+
+    \sa initFrom()
+*/
+
+/*!
+    \variable QStyleOption::rect
+    \brief the area that should be used for various calculations and painting
+
+    This can have different meanings for different types of elements.
+    For example, for a \l QStyle::CE_PushButton element it would be
+    the rectangle for the entire button, while for a \l
+    QStyle::CE_PushButtonLabel element it would be just the area for
+    the push button label.
+
+    The default value is a null rectangle, i.e. a rectangle with both
+    the width and the height set to 0.
+
+    \sa initFrom()
+*/
+
+/*!
+    \variable QStyleOption::state
+    \brief the style flags that are used when drawing the control
+
+    The default value is QStyle::State_None.
+
+    \sa initFrom(), QStyle::drawPrimitive(), QStyle::drawControl(),
+    QStyle::drawComplexControl(), QStyle::State
+*/
+
+/*!
+    \variable QStyleOption::type
+    \brief the option type of the style option
+
+    The default value is SO_Default.
+
+    \sa OptionType
+*/
+
+/*!
+    \variable QStyleOption::version
+    \brief the version of the style option
+
+    This value can be used by subclasses to implement extensions
+    without breaking compatibility. If you use the qstyleoption_cast()
+    function, you normally do not need to check it.
+
+    The default value is 1.
+*/
+
+/*!
+    \class QStyleOptionFocusRect
+    \brief The QStyleOptionFocusRect class is used to describe the
+    parameters for drawing a focus rectangle with QStyle.
+
+    For performance reasons, the access to the member variables is
+    direct (i.e., using the \c . or \c -> operator). This low-level feel
+    makes the structures straightforward to use and emphasizes that
+    these are simply parameters used by the style functions.
+
+    For an example demonstrating how style options can be used, see
+    the \l {widgets/styles}{Styles} example.
+
+    \sa QStyleOption
+*/
+
+/*!
+    Constructs a QStyleOptionFocusRect, initializing the members
+    variables to their default values.
+*/
+
+QStyleOptionFocusRect::QStyleOptionFocusRect()
+    : QStyleOption(Version, SO_FocusRect)
+{
+    state |= QStyle::State_KeyboardFocusChange; // assume we had one, will be corrected in initFrom()
+}
+
+/*!
+    \internal
+*/
+QStyleOptionFocusRect::QStyleOptionFocusRect(int version)
+    : QStyleOption(version, SO_FocusRect)
+{
+    state |= QStyle::State_KeyboardFocusChange;  // assume we had one, will be corrected in initFrom()
+}
+
+/*!
+    \enum QStyleOptionFocusRect::StyleOptionType
+
+    This enum is used to hold information about the type of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Type The type of style option provided (\l{SO_FocusRect} for this class).
+
+    The type is used internally by QStyleOption, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleOption subclass and your own styles.
+
+    \sa StyleOptionVersion
+*/
+
+/*!
+    \enum QStyleOptionFocusRect::StyleOptionVersion
+
+    This enum is used to hold information about the version of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Version 1
+
+    The version is used by QStyleOption subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+/*!
+    \fn QStyleOptionFocusRect::QStyleOptionFocusRect(const QStyleOptionFocusRect &other)
+
+    Constructs a copy of the \a other style option.
+*/
+
+/*!
+    \variable QStyleOptionFocusRect::backgroundColor
+    \brief the background color on which the focus rectangle is being drawn
+
+    The default value is an invalid color with the RGB value (0, 0,
+    0). An invalid color is a color that is not properly set up for
+    the underlying window system.
+*/
+
+/*!
+    \class QStyleOptionFrame
+    \brief The QStyleOptionFrame class is used to describe the
+    parameters for drawing a frame.
+
+    QStyleOptionFrame is used for drawing several built-in Qt widgets,
+    including QFrame, QGroupBox, QLineEdit, and QMenu. Note that to
+    describe the parameters necessary for drawing a frame in Qt 4.1 or
+    above, you must use the QStyleOptionFrameV2 subclass.
+
+    An instance of the QStyleOptionFrame class has
+    \l{QStyleOption::type} {type} SO_Frame and \l{QStyleOption::version}
+    {version} 1.
+
+    The type is used internally by QStyleOption, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleOption subclass and your own styles.  The
+    version is used by QStyleOption subclasses to implement extensions
+    without breaking compatibility. If you use qstyleoption_cast(),
+    you normally do not need to check it.
+
+    If you create your own QStyle subclass, you should handle both
+    QStyleOptionFrame and QStyleOptionFrameV2.
+
+    For an example demonstrating how style options can be used, see
+    the \l {widgets/styles}{Styles} example.
+
+    \sa QStyleOptionFrameV2, QStyleOption
+*/
+
+/*!
+    Constructs a QStyleOptionFrame, initializing the members
+    variables to their default values.
+*/
+
+QStyleOptionFrame::QStyleOptionFrame()
+    : QStyleOption(Version, SO_Frame), lineWidth(0), midLineWidth(0)
+{
+}
+
+/*!
+    \internal
+*/
+QStyleOptionFrame::QStyleOptionFrame(int version)
+    : QStyleOption(version, SO_Frame), lineWidth(0), midLineWidth(0)
+{
+}
+
+/*!
+    \fn QStyleOptionFrame::QStyleOptionFrame(const QStyleOptionFrame &other)
+
+    Constructs a copy of the \a other style option.
+*/
+
+/*!
+    \enum QStyleOptionFrame::StyleOptionType
+
+    This enum is used to hold information about the type of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Type The type of style option provided (\l{SO_Frame} for this class).
+
+    The type is used internally by QStyleOption, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleOption subclass and your own styles.
+
+    \sa StyleOptionVersion
+*/
+
+/*!
+    \enum QStyleOptionFrame::StyleOptionVersion
+
+    This enum is used to hold information about the version of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Version 1
+
+    The version is used by QStyleOption subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+/*!
+    \variable QStyleOptionFrame::lineWidth
+    \brief the line width for drawing the frame
+
+    The default value is 0.
+
+    \sa QFrame::lineWidth
+*/
+
+/*!
+    \variable QStyleOptionFrame::midLineWidth
+    \brief the mid-line width for drawing the frame
+
+    This is usually used in drawing sunken or raised frames.
+
+    The default value is 0.
+
+    \sa QFrame::midLineWidth
+*/
+
+/*!
+    \class QStyleOptionFrameV2
+    \brief The QStyleOptionFrameV2 class is used to describe the
+    parameters necessary for drawing a frame in Qt 4.1 or above.
+
+    \since 4.1
+
+    QStyleOptionFrameV2 inherits QStyleOptionFrame which is used for
+    drawing several built-in Qt widgets, including QFrame, QGroupBox,
+    QLineEdit, and QMenu.
+
+    An instance of the QStyleOptionFrameV2 class has
+    \l{QStyleOption::type} {type} SO_Frame and
+    \l{QStyleOption::version} {version} 2.  The type is used
+    internally by QStyleOption, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleOption subclass and your own styles. The
+    version is used by QStyleOption subclasses to implement extensions
+    without breaking compatibility. If you use qstyleoption_cast(),
+    you normally do not need to check it.
+
+    If you create your own QStyle subclass, you should handle both
+    QStyleOptionFrame and QStyleOptionFrameV2. One way to achieve this
+    is to use the QStyleOptionFrameV2 copy constructor. For example:
+
+    \snippet doc/src/snippets/qstyleoption/main.cpp 1
+
+    In the example above: If the \c frameOption's version is 1, \l
+    FrameFeature is set to \l None for \c frameOptionV2. If \c
+    frameOption's version is 2, the constructor will simply copy the
+    \c frameOption's \l FrameFeature value.
+
+    For an example demonstrating how style options can be used, see
+    the \l {widgets/styles}{Styles} example.
+
+    \sa QStyleOptionFrame, QStyleOption
+*/
+
+/*!
+    Constructs a QStyleOptionFrameV2 object.
+*/
+QStyleOptionFrameV2::QStyleOptionFrameV2()
+    : QStyleOptionFrame(Version), features(None)
+{
+}
+
+/*!
+    \fn QStyleOptionFrameV2::QStyleOptionFrameV2(const QStyleOptionFrameV2 &other)
+
+    Constructs a QStyleOptionFrameV2 copy of the \a other style option.
+*/
+
+/*!
+    \internal
+*/
+QStyleOptionFrameV2::QStyleOptionFrameV2(int version)
+    : QStyleOptionFrame(version), features(None)
+{
+}
+
+/*!
+    Constructs a QStyleOptionFrameV2 copy of the \a other style option
+    which can be either of the QStyleOptionFrameV2 or
+    QStyleOptionFrame types.
+
+    If the \a other style option's version is 1, the new style option's \l
+    FrameFeature value is set to \l QStyleOptionFrameV2::None. If its
+    version is 2, its \l FrameFeature value is simply copied to the
+    new style option.
+
+    \sa version
+*/
+QStyleOptionFrameV2::QStyleOptionFrameV2(const QStyleOptionFrame &other)
+{
+    QStyleOptionFrame::operator=(other);
+
+    const QStyleOptionFrameV2 *f2 = qstyleoption_cast<const QStyleOptionFrameV2 *>(&other);
+    features = f2 ? f2->features : FrameFeatures(QStyleOptionFrameV2::None);
+    version = Version;
+}
+
+/*!
+    Assigns the \a other style option to this style option. The \a
+    other style option can be either of the QStyleOptionFrameV2 or
+    QStyleOptionFrame types.
+
+    If the \a{other} style option's version is 1, this style option's
+    \l FrameFeature value is set to \l QStyleOptionFrameV2::None. If
+    its version is 2, its \l FrameFeature value is simply copied to
+    this style option.
+*/
+QStyleOptionFrameV2 &QStyleOptionFrameV2::operator=(const QStyleOptionFrame &other)
+{
+    QStyleOptionFrame::operator=(other);
+
+    const QStyleOptionFrameV2 *f2 = qstyleoption_cast<const QStyleOptionFrameV2 *>(&other);
+    features = f2 ? f2->features : FrameFeatures(QStyleOptionFrameV2::None);
+    version = Version;
+    return *this;
+}
+
+/*!
+    \enum QStyleOptionFrameV2::FrameFeature
+
+    This enum describles the different types of features a frame can have.
+
+    \value None Indicates a normal frame.
+    \value Flat Indicates a flat frame.
+*/
+
+/*!
+    \variable QStyleOptionFrameV2::features
+    \brief a bitwise OR of the features that describe this frame.
+
+    \sa FrameFeature
+*/
+
+/*!
+    \enum QStyleOptionFrameV2::StyleOptionVersion
+
+    This enum is used to hold information about the version of the
+    style option, and is defined for each QStyleOption subclass.
+
+    \value Version 2
+
+    The version is used by QStyleOption subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+/*!
+    \class QStyleOptionFrameV3
+    \brief The QStyleOptionFrameV3 class is used to describe the
+    parameters necessary for drawing a frame in Qt 4.1 or above.
+
+    \since 4.5
+
+    QStyleOptionFrameV3 inherits QStyleOptionFrameV2
+
+    An instance of the QStyleOptionFrameV3 class has
+    \l{QStyleOption::type} {type} SO_Frame and
+    \l{QStyleOption::version} {version} 3.  The type is used
+    internally by QStyleOption, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleOption subclass and your own styles. The
+    version is used by QStyleOption subclasses to implement extensions
+    without breaking compatibility. If you use qstyleoption_cast(),
+    you normally do not need to check it.
+
+    \sa QStyleOptionFrameV2, QStyleOption
+*/
+
+/*!
+    Constructs a QStyleOptionFrameV3 object.
+*/
+QStyleOptionFrameV3::QStyleOptionFrameV3()
+    : QStyleOptionFrameV2(Version), frameShape(QFrame::NoFrame)
+{
+}
+
+/*!
+    \fn QStyleOptionFrameV3::QStyleOptionFrameV3(const QStyleOptionFrameV3 &other)
+
+    Constructs a QStyleOptionFrameV3 copy of the \a other style option.
+*/
+
+/*!
+    \internal
+*/
+QStyleOptionFrameV3::QStyleOptionFrameV3(int version)
+    : QStyleOptionFrameV2(version), frameShape(QFrame::NoFrame)
+{
+}
+
+/*!
+    Constructs a QStyleOptionFrameV3 copy of the \a other style option
+    which can be either of the QStyleOptionFrameV3 or
+    QStyleOptionFrame types.
+
+    If the \a other style option's version is 1, the new style
+    option's \l FrameFeature value is set to
+    \l{QStyleOptionFrameV2::None}. If its version is 2 or lower,
+    \l{QStyleOptionFrameV3::frameShape} value is QFrame::NoFrame
+
+    \sa version
+*/
+QStyleOptionFrameV3::QStyleOptionFrameV3(const QStyleOptionFrame &other)
+{
+    operator=(other);
+}
+
+/*!
+    Assigns the \a other style option to this style option. The \a
+    other style option can be either of the QStyleOptionFrameV3,
+    QStyleOptionFrameV2 or QStyleOptionFrame types.
+
+    If the \a other style option's version is 1, the new style
+    option's \l FrameFeature value is set to
+    \l{QStyleOptionFrameV2::None}. If its version is 2 or lower,
+    \l{QStyleOptionFrameV3::frameShape} value is QFrame::NoFrame
+*/
+QStyleOptionFrameV3 &QStyleOptionFrameV3::operator=(const QStyleOptionFrame &other)
+{
+    QStyleOptionFrameV2::operator=(other);
+
+    const QStyleOptionFrameV3 *f3 = qstyleoption_cast<const QStyleOptionFrameV3 *>(&other);
+    frameShape = f3 ? f3->frameShape : QFrame::NoFrame;
+    version = Version;
+    return *this;
+}
+
+
+/*!
+    \variable QStyleOptionFrameV3::frameShape
+    \brief This property holds the frame shape value of the frame.
+
+    \sa QFrame::frameShape
+*/
+
+/*!
+    \enum QStyleOptionFrameV3::StyleOptionVersion
+
+    This enum is used to hold information about the version of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Version 3
+
+    The version is used by QStyleOption subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+/*!
+    \class QStyleOptionViewItemV2
+    \brief The QStyleOptionViewItemV2 class is used to describe the
+    parameters necessary for drawing a frame in Qt 4.2 or above.
+    \since 4.2
+
+    QStyleOptionViewItemV2 inherits QStyleOptionViewItem.
+
+    An instance of the QStyleOptionViewItemV2 class has
+    \l{QStyleOption::type} {type} SO_ViewItem and
+    \l{QStyleOption::version} {version} 2. The type is used internally
+    by QStyleOption, its subclasses, and qstyleoption_cast() to
+    determine the type of style option. In general you do not need to
+    worry about this unless you want to create your own QStyleOption
+    subclass and your own styles. The version is used by QStyleOption
+    subclasses to implement extensions without breaking
+    compatibility. If you use qstyleoption_cast(), you normally do not
+    need to check it.
+
+    See QStyleOptionFrameV2's detailed description for a discussion
+    of how to handle "V2" classes.
+
+    \sa QStyleOptionViewItem, QStyleOption
+*/
+
+/*!
+    \enum QStyleOptionViewItemV2::StyleOptionVersion
+
+    This enum is used to hold information about the version of the
+    style option, and is defined for each QStyleOption subclass.
+
+    \value Version 2
+
+    The version is used by QStyleOption subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+/*!
+    \variable QStyleOptionViewItemV2::features
+    \brief a bitwise OR of the features that describe this view item
+
+    \sa ViewItemFeature
+*/
+
+/*!
+    Constructs a QStyleOptionViewItemV2 object.
+*/
+QStyleOptionViewItemV2::QStyleOptionViewItemV2()
+    : QStyleOptionViewItem(Version), features(None)
+{
+}
+
+/*!
+    \fn QStyleOptionViewItemV2::QStyleOptionViewItemV2(const QStyleOptionViewItemV2 &other)
+
+    Constructs a copy of \a other.
+*/
+
+/*!
+    Constructs a QStyleOptionViewItemV2 copy of the \a other style option
+    which can be either of the QStyleOptionViewItemV2 or
+    QStyleOptionViewItem types.
+
+    If the \a other style option's version is 1, the new style option's \l
+    ViewItemFeature value is set to \l QStyleOptionViewItemV2::None. If its
+    version is 2, its \l ViewItemFeature value is simply copied to the
+    new style option.
+
+    \sa version
+*/
+QStyleOptionViewItemV2::QStyleOptionViewItemV2(const QStyleOptionViewItem &other)
+    : QStyleOptionViewItem(Version)
+{
+    (void)QStyleOptionViewItemV2::operator=(other);
+}
+
+/*!
+    \internal
+*/
+QStyleOptionViewItemV2::QStyleOptionViewItemV2(int version)
+    : QStyleOptionViewItem(version)
+{
+
+}
+
+/*!
+    Assigns the \a other style option to this style option. The \a
+    other style option can be either of the QStyleOptionViewItemV2 or
+    QStyleOptionViewItem types.
+
+    If the \a{other} style option's version is 1, this style option's
+    \l ViewItemFeature value is set to \l QStyleOptionViewItemV2::None.
+    If its version is 2, its \l ViewItemFeature value is simply copied
+    to this style option.
+*/
+QStyleOptionViewItemV2 &QStyleOptionViewItemV2::operator=(const QStyleOptionViewItem &other)
+{
+    QStyleOptionViewItem::operator=(other);
+    const QStyleOptionViewItemV2 *v2 = qstyleoption_cast<const QStyleOptionViewItemV2 *>(&other);
+    features = v2 ? v2->features : ViewItemFeatures(QStyleOptionViewItemV2::None);
+    return *this;
+}
+
+/*!
+    \enum QStyleOptionViewItemV2::ViewItemFeature
+
+    This enum describles the different types of features an item can have.
+
+    \value None      Indicates a normal item.
+    \value WrapText  Indicates an item with wrapped text.
+    \value Alternate Indicates that the item's background is rendered using alternateBase.
+    \value HasCheckIndicator Indicates that the item has a check state indicator.
+    \value HasDisplay        Indicates that the item has a display role.
+    \value HasDecoration     Indicates that the item has a decoration role.
+*/
+
+
+
+/*!
+    \class QStyleOptionViewItemV3
+    \brief The QStyleOptionViewItemV3 class is used to describe the
+    parameters necessary for drawing a frame in Qt 4.3 or above.
+    \since 4.3
+
+    QStyleOptionViewItemV3 inherits QStyleOptionViewItem.
+
+    An instance of the QStyleOptionViewItemV3 class has
+    \l{QStyleOption::type} {type} SO_ViewItem and \l{QStyleOption::version}
+    {version} 3. The type is used internally by QStyleOption, its subclasses,
+    and qstyleoption_cast() to determine the type of style option. In general
+    you do not need to worry about this unless you want to create your own
+    QStyleOption subclass and your own styles. The version is used by
+    QStyleOption subclasses to implement extensions without breaking
+    compatibility. If you use qstyleoption_cast(), you normally do not need to
+    check it.
+
+    See QStyleOptionFrameV2's detailed description for a discussion
+    of how to handle "V2" and other versioned classes.
+
+    \sa QStyleOptionViewItem, QStyleOption
+*/
+
+/*!
+    \enum QStyleOptionViewItemV3::StyleOptionVersion
+
+    This enum is used to hold information about the version of the
+    style option, and is defined for each QStyleOption subclass.
+
+    \value Version 3
+
+    The version is used by QStyleOption subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+/*!
+    Constructs a QStyleOptionViewItemV3 object.
+*/
+QStyleOptionViewItemV3::QStyleOptionViewItemV3()
+    : QStyleOptionViewItemV2(Version)
+{
+}
+
+/*!
+    Constructs a copy of \a other.
+*/
+QStyleOptionViewItemV3::QStyleOptionViewItemV3(const QStyleOptionViewItem &other)
+    : QStyleOptionViewItemV2(Version)
+{
+    (void)QStyleOptionViewItemV3::operator=(other);
+}
+
+/*!
+    \fn QStyleOptionViewItemV3::QStyleOptionViewItemV3(const QStyleOptionViewItemV3 &other)
+
+    Constructs a copy of \a other.
+*/
+
+/*!
+    Assigns the \a other style option to this style option. The \a
+    other style option can be an instance of the QStyleOptionViewItemV2,
+    QStyleOptionViewItemV3 or QStyleOptionViewItem types.
+*/
+QStyleOptionViewItemV3 &QStyleOptionViewItemV3::operator = (const QStyleOptionViewItem &other)
+{
+    QStyleOptionViewItemV2::operator=(other);
+    const QStyleOptionViewItemV3 *v3 = qstyleoption_cast<const QStyleOptionViewItemV3*>(&other);
+    locale = v3 ? v3->locale : QLocale();
+    widget = v3 ? v3->widget : 0;
+    return *this;
+}
+
+/*!
+    \internal
+*/
+QStyleOptionViewItemV3::QStyleOptionViewItemV3(int version)
+    : QStyleOptionViewItemV2(version)
+{
+}
+
+#ifndef QT_NO_ITEMVIEWS
+
+/*!
+    \class QStyleOptionViewItemV4
+    \brief The QStyleOptionViewItemV4 class is used to describe the
+    parameters necessary for drawing a frame in Qt 4.4 or above.
+    \since 4.4
+
+    QStyleOptionViewItemV4 inherits QStyleOptionViewItemV3.
+
+    An instance of the QStyleOptionViewItemV4 class has
+    \l{QStyleOption::type} {type} SO_ViewItem and
+    \l{QStyleOption::version} {version} 4. The type is used internally
+    by QStyleOption, its subclasses, and qstyleoption_cast() to
+    determine the type of style option. In general you do not need to
+    worry about this unless you want to create your own QStyleOption
+    subclass and your own styles. The version is used by QStyleOption
+    subclasses to implement extensions without breaking
+    compatibility. If you use qstyleoption_cast(), you normally do not
+    need to check it.
+
+    See QStyleOptionViewItemV3's detailed description for a discussion
+    of how to handle "V3" classes.
+
+    \sa QStyleOptionViewItem, QStyleOption
+*/
+
+/*!
+    \variable QStyleOptionViewItemV4::index
+
+    The model index that is to be drawn.
+*/
+
+/*!
+    \variable QStyleOptionViewItemV4::checkState
+
+    If this view item is checkable, i.e.,
+    ViewItemFeature::HasCheckIndicator is true, \c checkState is true
+    if the item is checked; otherwise, it is false.
+
+*/
+
+/*!
+    \variable QStyleOptionViewItemV4::icon
+
+    The icon (if any) to be drawn in the view item.
+*/
+
+
+/*!
+    \variable QStyleOptionViewItemV4::text
+
+    The text (if any) to be drawn in the view item.
+*/
+
+/*!
+    \variable QStyleOptionViewItemV4::backgroundBrush
+
+    The QBrush that should be used to paint the view items
+    background.
+*/
+
+/*!
+    \variable QStyleOptionViewItemV4::viewItemPosition
+
+    Gives the position of this view item relative to other items. See
+    the \l{QStyleOptionViewItemV4::}{ViewItemPosition} enum for the
+    details.
+*/
+
+/*!
+    \enum QStyleOptionViewItemV4::StyleOptionVersion
+
+    This enum is used to hold information about the version of the
+    style option, and is defined for each QStyleOption subclass.
+
+    \value Version 4
+
+    The version is used by QStyleOption subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+/*!
+    \enum QStyleOptionViewItemV4::ViewItemPosition
+
+    This enum is used to represent the placement of the item on
+    a row. This can be used to draw items differently depending
+    on their placement, for example by putting rounded edges at
+    the beginning and end, and straight edges in between.
+
+    \value Invalid   The ViewItemPosition is unknown and should be
+                     disregarded.
+    \value Beginning The item appears at the beginning of the row.
+    \value Middle    The item appears in the middle of the row.
+    \value End       The item appears at the end of the row.
+    \value OnlyOne   The item is the only one on the row, and is
+                     therefore both at the beginning and the end.
+*/
+
+
+/*!
+    Constructs a QStyleOptionViewItemV4 object.
+*/
+QStyleOptionViewItemV4::QStyleOptionViewItemV4()
+: QStyleOptionViewItemV3(Version), checkState(Qt::Unchecked), viewItemPosition(QStyleOptionViewItemV4::Invalid)
+{
+}
+
+/*!
+    \fn QStyleOptionViewItemV4::QStyleOptionViewItemV4(const QStyleOptionViewItemV4 &other)
+
+    Constructs a copy of \a other.
+*/
+
+/*!
+    Constructs a QStyleOptionViewItemV4 copy of the \a other style option
+    which can be either of the QStyleOptionViewItemV3 or
+    QStyleOptionViewItem types.
+
+    \sa version
+*/
+QStyleOptionViewItemV4::QStyleOptionViewItemV4(const QStyleOptionViewItem &other)
+    : QStyleOptionViewItemV3(Version)
+{
+    (void)QStyleOptionViewItemV4::operator=(other);
+}
+
+/*!
+    Assigns the \a other style option to this style option. The \a
+    other style option can be either of the QStyleOptionViewItemV3 or
+    QStyleOptionViewItem types.
+*/
+QStyleOptionViewItemV4 &QStyleOptionViewItemV4::operator = (const QStyleOptionViewItem &other)
+{
+    QStyleOptionViewItemV3::operator=(other);
+    if (const QStyleOptionViewItemV4 *v4 = qstyleoption_cast<const QStyleOptionViewItemV4*>(&other)) {
+        index = v4->index;
+        checkState = v4->checkState;
+        text = v4->text;
+        viewItemPosition = v4->viewItemPosition;
+        backgroundBrush = v4->backgroundBrush;
+        icon = v4->icon;
+    } else {
+        viewItemPosition = QStyleOptionViewItemV4::Invalid;
+        checkState = Qt::Unchecked;
+    }
+    return *this;
+}
+
+/*!
+    \internal
+*/
+QStyleOptionViewItemV4::QStyleOptionViewItemV4(int version)
+    : QStyleOptionViewItemV3(version)
+{
+}
+#endif // QT_NO_ITEMVIEWS
+
+/*!
+    \class QStyleOptionGroupBox
+    \brief The QStyleOptionGroupBox class describes the parameters for
+    drawing a group box.
+
+    \since 4.1
+
+    QStyleOptionButton contains all the information that QStyle
+    functions need the various graphical elements of a group box.
+
+    It holds the lineWidth and the midLineWidth for drawing the panel,
+    the group box's \l {text}{title} and the title's \l
+    {textAlignment}{alignment} and \l {textColor}{color}.
+
+    For performance reasons, the access to the member variables is
+    direct (i.e., using the \c . or \c -> operator). This low-level feel
+    makes the structures straightforward to use and emphasizes that
+    these are simply parameters used by the style functions.
+
+    For an example demonstrating how style options can be used, see
+    the \l {widgets/styles}{Styles} example.
+
+    \sa QStyleOption, QStyleOptionComplex, QGroupBox
+*/
+
+/*!
+    \enum QStyleOptionGroupBox::StyleOptionType
+
+    This enum is used to hold information about the type of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Type The type of style option provided (\l{SO_GroupBox} for this class).
+
+    The type is used internally by QStyleOption, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleOption subclass and your own styles.
+
+    \sa StyleOptionVersion
+*/
+
+/*!
+    \enum QStyleOptionGroupBox::StyleOptionVersion
+
+    This enum is used to hold information about the version of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Version 1
+
+    The version is used by QStyleOption subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+/*!
+    \variable QStyleOptionGroupBox::lineWidth
+    \brief the line width for drawing the panel
+
+    The value of this variable is, currently, always 1.
+
+    \sa QFrame::lineWidth
+*/
+
+/*!
+    \variable QStyleOptionGroupBox::midLineWidth
+    \brief the mid-line width for drawing the panel
+
+    The mid-line width is usually used when drawing sunken or raised
+    group box frames. The value of this variable is, currently, always 0.
+
+    \sa QFrame::midLineWidth
+*/
+
+/*!
+    \variable QStyleOptionGroupBox::text
+    \brief the text of the group box
+
+    The default value is an empty string.
+
+    \sa QGroupBox::title
+*/
+
+/*!
+    \variable QStyleOptionGroupBox::textAlignment
+    \brief the alignment of the group box title
+
+    The default value is Qt::AlignLeft.
+
+    \sa QGroupBox::alignment
+*/
+
+/*!
+    \variable QStyleOptionGroupBox::features
+    \brief the features of the group box frame
+
+    The frame is flat by default.
+    
+    \sa QStyleOptionFrameV2::FrameFeature
+*/
+
+/*!
+    \variable QStyleOptionGroupBox::textColor
+    \brief the color of the group box title
+
+    The default value is an invalid color with the RGB value (0, 0,
+    0). An invalid color is a color that is not properly set up for
+    the underlying window system.
+*/
+
+/*!
+    Constructs a QStyleOptionGroupBox, initializing the members
+    variables to their default values.
+*/
+QStyleOptionGroupBox::QStyleOptionGroupBox()
+    : QStyleOptionComplex(Version, Type), features(QStyleOptionFrameV2::None),
+      textAlignment(Qt::AlignLeft), lineWidth(0), midLineWidth(0)
+{
+}
+
+/*!
+    \fn QStyleOptionGroupBox::QStyleOptionGroupBox(const QStyleOptionGroupBox &other)
+
+    Constructs a copy of the \a other style option.
+*/
+
+/*!
+    \internal
+*/
+QStyleOptionGroupBox::QStyleOptionGroupBox(int version)
+    : QStyleOptionComplex(version, Type), features(QStyleOptionFrameV2::None),
+      textAlignment(Qt::AlignLeft), lineWidth(0), midLineWidth(0)
+{
+}
+
+/*!
+    \class QStyleOptionHeader
+    \brief The QStyleOptionHeader class is used to describe the
+    parameters for drawing a header.
+
+    QStyleOptionHeader contains all the information that QStyle
+    functions need to draw the item views' header pane, header sort
+    arrow, and header label.
+
+    For performance reasons, the access to the member variables is
+    direct (i.e., using the \c . or \c -> operator). This low-level feel
+    makes the structures straightforward to use and emphasizes that
+    these are simply parameters used by the style functions.
+
+    For an example demonstrating how style options can be used, see
+    the \l {widgets/styles}{Styles} example.
+
+    \sa QStyleOption
+*/
+
+/*!
+    Constructs a QStyleOptionHeader, initializing the members
+    variables to their default values.
+*/
+
+QStyleOptionHeader::QStyleOptionHeader()
+    : QStyleOption(QStyleOptionHeader::Version, SO_Header),
+      section(0), textAlignment(Qt::AlignLeft), iconAlignment(Qt::AlignLeft),
+      position(QStyleOptionHeader::Beginning),
+      selectedPosition(QStyleOptionHeader::NotAdjacent), sortIndicator(None),
+      orientation(Qt::Horizontal)
+{
+}
+
+/*!
+    \internal
+*/
+QStyleOptionHeader::QStyleOptionHeader(int version)
+    : QStyleOption(version, SO_Header),
+      section(0), textAlignment(Qt::AlignLeft), iconAlignment(Qt::AlignLeft),
+      position(QStyleOptionHeader::Beginning),
+      selectedPosition(QStyleOptionHeader::NotAdjacent), sortIndicator(None),
+      orientation(Qt::Horizontal)
+{
+}
+
+/*!
+    \variable QStyleOptionHeader::orientation
+    \brief the header's orientation (horizontal or vertical)
+
+    The default orientation is Qt::Horizontal
+*/
+
+/*!
+    \fn QStyleOptionHeader::QStyleOptionHeader(const QStyleOptionHeader &other)
+
+    Constructs a copy of the \a other style option.
+*/
+
+/*!
+    \enum QStyleOptionHeader::StyleOptionType
+
+    This enum is used to hold information about the type of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Type The type of style option provided (\l{SO_Header} for this class).
+
+    The type is used internally by QStyleOption, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleOption subclass and your own styles.
+
+    \sa StyleOptionVersion
+*/
+
+/*!
+    \enum QStyleOptionHeader::StyleOptionVersion
+
+    This enum is used to hold information about the version of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Version 1
+
+    The version is used by QStyleOption subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+/*!
+    \variable QStyleOptionHeader::section
+    \brief which section of the header is being painted
+
+    The default value is 0.
+*/
+
+/*!
+    \variable QStyleOptionHeader::text
+    \brief the text of the header
+
+    The default value is an empty string.
+*/
+
+/*!
+    \variable QStyleOptionHeader::textAlignment
+    \brief the alignment flags for the text of the header
+
+    The default value is Qt::AlignLeft.
+*/
+
+/*!
+    \variable QStyleOptionHeader::icon
+    \brief the icon of the header
+
+    The default value is an empty icon, i.e. an icon with neither a
+    pixmap nor a filename.
+*/
+
+/*!
+    \variable QStyleOptionHeader::iconAlignment
+    \brief the alignment flags for the icon of the header
+
+    The default value is Qt::AlignLeft.
+*/
+
+/*!
+    \variable QStyleOptionHeader::position
+    \brief the section's position in relation to the other sections
+
+    The default value is QStyleOptionHeader::Beginning.
+*/
+
+/*!
+    \variable QStyleOptionHeader::selectedPosition
+    \brief the section's position in relation to the selected section
+
+    The default value is QStyleOptionHeader::NotAdjacent
+*/
+
+/*!
+    \variable QStyleOptionHeader::sortIndicator
+    \brief the direction the sort indicator should be drawn
+
+    The default value is QStyleOptionHeader::None.
+*/
+
+/*!
+    \enum QStyleOptionHeader::SectionPosition
+
+    This enum lets you know where the section's position is in relation to the other sections.
+
+    \value Beginning At the beginining of the header
+    \value Middle In the middle of the header
+    \value End At the end of the header
+    \value OnlyOneSection Only one header section
+
+    \sa position
+*/
+
+/*!
+    \enum QStyleOptionHeader::SelectedPosition
+
+    This enum lets you know where the section's position is in relation to the selected section.
+
+    \value NotAdjacent Not adjacent to the selected section
+    \value NextIsSelected The next section is selected
+    \value PreviousIsSelected The previous section is selected
+    \value NextAndPreviousAreSelected Both the next and previous section are selected
+
+    \sa selectedPosition
+*/
+
+/*!
+    \enum QStyleOptionHeader::SortIndicator
+
+    Indicates which direction the sort indicator should be drawn
+
+    \value None No sort indicator is needed
+    \value SortUp Draw an up indicator
+    \value SortDown Draw a down indicator
+
+    \sa sortIndicator
+*/
+
+/*!
+    \class QStyleOptionButton
+    \brief The QStyleOptionButton class is used to describe the
+    parameters for drawing buttons.
+
+    QStyleOptionButton contains all the information that QStyle
+    functions need to draw graphical elements like QPushButton,
+    QCheckBox, and QRadioButton.
+
+    For performance reasons, the access to the member variables is
+    direct (i.e., using the \c . or \c -> operator). This low-level feel
+    makes the structures straightforward to use and emphasizes that
+    these are simply parameters used by the style functions.
+
+    For an example demonstrating how style options can be used, see
+    the \l {widgets/styles}{Styles} example.
+
+    \sa QStyleOption, QStyleOptionToolButton
+*/
+
+/*!
+    \enum QStyleOptionButton::ButtonFeature
+
+    This enum describes the different types of features a push button can have.
+
+    \value None Indicates a normal push button.
+    \value Flat Indicates a flat push button.
+    \value HasMenu Indicates that the button has a drop down menu.
+    \value DefaultButton Indicates that the button is a default button.
+    \value AutoDefaultButton Indicates that the button is an auto default button.
+    \value CommandLinkButton Indicates that the button is a Windows Vista type command link.
+
+    \sa features
+*/
+
+/*!
+    Constructs a QStyleOptionButton, initializing the members
+    variables to their default values.
+*/
+
+QStyleOptionButton::QStyleOptionButton()
+    : QStyleOption(QStyleOptionButton::Version, SO_Button), features(None)
+{
+}
+
+/*!
+    \internal
+*/
+QStyleOptionButton::QStyleOptionButton(int version)
+    : QStyleOption(version, SO_Button), features(None)
+{
+}
+
+/*!
+    \fn QStyleOptionButton::QStyleOptionButton(const QStyleOptionButton &other)
+
+    Constructs a copy of the \a other style option.
+*/
+
+/*!
+    \enum QStyleOptionButton::StyleOptionType
+
+    This enum is used to hold information about the type of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Type The type of style option provided (\l{SO_Button} for this class).
+
+    The type is used internally by QStyleOption, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleOption subclass and your own styles.
+
+    \sa StyleOptionVersion
+*/
+
+/*!
+    \enum QStyleOptionButton::StyleOptionVersion
+
+    This enum is used to hold information about the version of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Version 1
+
+    The version is used by QStyleOption subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+/*!
+    \variable QStyleOptionButton::features
+    \brief a bitwise OR of the features that describe this button
+
+    \sa ButtonFeature
+*/
+
+/*!
+    \variable QStyleOptionButton::text
+    \brief the text of the button
+
+    The default value is an empty string.
+*/
+
+/*!
+    \variable QStyleOptionButton::icon
+    \brief the icon of the button
+
+    The default value is an empty icon, i.e. an icon with neither a
+    pixmap nor a filename.
+
+    \sa iconSize
+*/
+
+/*!
+    \variable QStyleOptionButton::iconSize
+    \brief the size of the icon for the button
+
+    The default value is QSize(-1, -1), i.e. an invalid size.
+*/
+
+
+#ifndef QT_NO_TOOLBAR
+/*!
+    \class QStyleOptionToolBar
+    \brief The QStyleOptionToolBar class is used to describe the
+    parameters for drawing a toolbar.
+
+    \since 4.1
+
+    QStyleOptionToolBar contains all the information that QStyle
+    functions need to draw QToolBar.
+
+    For performance reasons, the access to the member variables is
+    direct (i.e., using the \c . or \c -> operator). This low-level feel
+    makes the structures straightforward to use and emphasizes that
+    these are simply parameters used by the style functions.
+
+    The QStyleOptionToolBar class holds the lineWidth and the
+    midLineWidth for drawing the widget. It also stores information
+    about which \l {toolBarArea}{area} the toolbar should be located
+    in, whether it is movable or not, which position the toolbar line
+    should have (positionOfLine), and the toolbar's position within
+    the line (positionWithinLine).
+
+    In addition, the class provides a couple of enums: The
+    ToolBarFeature enum is used to describe whether a toolbar is
+    movable or not, and the ToolBarPosition enum is used to describe
+    the position of a toolbar line, as well as the toolbar's position
+    within the line.
+
+    For an example demonstrating how style options can be used, see
+    the \l {widgets/styles}{Styles} example.
+
+    \sa QStyleOption
+*/
+
+/*!
+    Constructs a QStyleOptionToolBar, initializing the members
+    variables to their default values.
+*/
+
+QStyleOptionToolBar::QStyleOptionToolBar()
+    : QStyleOption(Version, SO_ToolBar), positionOfLine(OnlyOne), positionWithinLine(OnlyOne),
+      toolBarArea(Qt::TopToolBarArea), features(None), lineWidth(0), midLineWidth(0)
+{
+}
+
+/*!
+    \fn QStyleOptionToolBar::QStyleOptionToolBar(const QStyleOptionToolBar &other)
+
+    Constructs a copy of the \a other style option.
+*/
+
+/*!
+    \internal
+*/
+QStyleOptionToolBar::QStyleOptionToolBar(int version)
+: QStyleOption(version, SO_ToolBar), positionOfLine(OnlyOne), positionWithinLine(OnlyOne),
+  toolBarArea(Qt::TopToolBarArea), features(None), lineWidth(0), midLineWidth(0)
+{
+
+}
+
+/*!
+    \enum QStyleOptionToolBar::ToolBarPosition
+
+    \image qstyleoptiontoolbar-position.png
+
+    This enum is used to describe the position of a toolbar line, as
+    well as the toolbar's position within the line.
+
+    The order of the positions within a line starts at the top of a
+    vertical line, and from the left within a horizontal line. The
+    order of the positions for the lines is always from the the
+    parent widget's boundary edges.
+
+    \value Beginning The toolbar is located at the beginning of the line,
+           or the toolbar line is the first of several lines. There can
+           only be one toolbar (and only one line) with this position.
+    \value Middle The toolbar is located in the middle of the line,
+           or the toolbar line is in the middle of several lines. There can
+           several toolbars (and lines) with this position.
+    \value End The toolbar is located at the end of the line,
+           or the toolbar line is the last of several lines. There can
+           only be one toolbar (and only one line) with this position.
+    \value OnlyOne There is only one toolbar or line. This is the default value
+           of the positionOfLine and positionWithinLine variables.
+
+    \sa positionWithinLine, positionOfLine
+*/
+
+/*!
+    \enum QStyleOptionToolBar::ToolBarFeature
+
+    This enum is used to describe whether a toolbar is movable or not.
+
+    \value None The toolbar cannot be moved. The default value.
+    \value Movable The toolbar is movable, and a handle will appear when
+           holding the cursor over the toolbar's boundary.
+
+    \sa features, QToolBar::isMovable()
+*/
+
+/*!
+    \variable QStyleOptionToolBar::positionOfLine
+
+    This variable holds the position of the toolbar line.
+
+    The default value is QStyleOptionToolBar::OnlyOne.
+*/
+
+/*!
+    \variable QStyleOptionToolBar::positionWithinLine
+
+    This variable holds the position of the toolbar within a line.
+
+    The default value is QStyleOptionToolBar::OnlyOne.
+*/
+
+/*!
+    \variable QStyleOptionToolBar::toolBarArea
+
+    This variable holds the location for drawing the toolbar.
+
+    The default value is Qt::TopToolBarArea.
+
+    \sa Qt::ToolBarArea
+*/
+
+/*!
+    \variable QStyleOptionToolBar::features
+
+    This variable holds whether the toolbar is movable or not.
+
+    The default value is \l None.
+*/
+
+/*!
+    \variable QStyleOptionToolBar::lineWidth
+
+    This variable holds the line width for drawing the toolbar.
+
+    The default value is 0.
+*/
+
+/*!
+    \variable QStyleOptionToolBar::midLineWidth
+
+    This variable holds the mid-line width for drawing the toolbar.
+
+    The default value is 0.
+*/
+
+/*!
+    \enum QStyleOptionToolBar::StyleOptionType
+
+    This enum is used to hold information about the type of the style
+    option, and is defined for each QStyleOption subclass.
+
+    \value Type The type of style option provided (\l{SO_ToolBar} for
+    this class).
+
+    The type is used internally by QStyleOption, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleOption subclass and your own styles.
+
+    \sa StyleOptionVersion
+*/
+
+/*!
+    \enum QStyleOptionToolBar::StyleOptionVersion
+
+    This enum is used to hold information about the version of the
+    style option, and is defined for each QStyleOption subclass.
+
+    \value Version 1
+
+    The version is used by QStyleOption subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+#endif
+
+#ifndef QT_NO_TABBAR
+/*!
+    \class QStyleOptionTab
+    \brief The QStyleOptionTab class is used to describe the
+    parameters for drawing a tab bar.
+
+    The QStyleOptionTab class is used for drawing several built-in Qt
+    widgets including \l QTabBar and the panel for \l QTabWidget. Note
+    that to describe the parameters necessary for drawing a frame in
+    Qt 4.1 or above, you must use the QStyleOptionFrameV2 subclass.
+
+    An instance of the QStyleOptiontabV2 class has
+    \l{QStyleOption::type} {type} \l SO_Tab and
+    \l{QStyleOption::version} {version} 1. The type is used internally
+    by QStyleOption, its subclasses, and qstyleoption_cast() to
+    determine the type of style option. In general you do not need to
+    worry about this unless you want to create your own QStyleOption
+    subclass and your own styles. The version is used by QStyleOption
+    subclasses to implement extensions without breaking
+    compatibility. If you use qstyleoption_cast(), you normally do not
+    need to check it.
+
+    If you create your own QStyle subclass, you should handle both
+    QStyleOptionTab and QStyleOptionTabV2.
+
+    For an example demonstrating how style options can be used, see
+    the \l {widgets/styles}{Styles} example.
+
+    \sa QStyleOptionTabV2, QStyleOption
+*/
+
+/*!
+    Constructs a QStyleOptionTab object, initializing the members
+    variables to their default values.
+*/
+
+QStyleOptionTab::QStyleOptionTab()
+    : QStyleOption(QStyleOptionTab::Version, SO_Tab),
+      shape(QTabBar::RoundedNorth),
+      row(0),
+      position(Beginning),
+      selectedPosition(NotAdjacent), cornerWidgets(QStyleOptionTab::NoCornerWidgets)
+{
+}
+
+/*!
+    \internal
+*/
+QStyleOptionTab::QStyleOptionTab(int version)
+    : QStyleOption(version, SO_Tab),
+      shape(QTabBar::RoundedNorth),
+      row(0),
+      position(Beginning),
+      selectedPosition(NotAdjacent), cornerWidgets(QStyleOptionTab::NoCornerWidgets)
+{
+}
+
+/*!
+    \fn QStyleOptionTab::QStyleOptionTab(const QStyleOptionTab &other)
+
+    Constructs a copy of the \a other style option.
+*/
+
+/*!
+    \enum QStyleOptionTab::StyleOptionType
+
+    This enum is used to hold information about the type of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Type The type of style option provided (\l{SO_Tab} for this class).
+
+    The type is used internally by QStyleOption, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleOption subclass and your own styles.
+
+    \sa StyleOptionVersion
+*/
+
+/*!
+    \enum QStyleOptionTab::StyleOptionVersion
+
+    This enum is used to hold information about the version of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Version 1
+
+    The version is used by QStyleOption subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+/*!
+    \enum QStyleOptionTab::TabPosition
+
+    This enum describes the position of the tab.
+
+    \value Beginning The tab is the first tab in the tab bar.
+    \value Middle The tab is neither the first nor the last tab in the tab bar.
+    \value End The tab is the last tab in the tab bar.
+    \value OnlyOneTab The tab is both the first and the last tab in the tab bar.
+
+    \sa position
+*/
+
+/*!
+    \enum QStyleOptionTab::CornerWidget
+
+    These flags indicate the corner widgets in a tab.
+
+    \value NoCornerWidgets  There are no corner widgets
+    \value LeftCornerWidget  Left corner widget
+    \value RightCornerWidget Right corner widget
+
+    \sa cornerWidgets
+*/
+
+/*! \enum QStyleOptionTab::SelectedPosition
+
+    This enum describes the position of the selected tab. Some styles
+    need to draw a tab differently depending on whether or not it is
+    adjacent to the selected tab.
+
+    \value NotAdjacent The tab is not adjacent to a selected tab (or is the selected tab).
+    \value NextIsSelected The next tab (typically the tab on the right) is selected.
+    \value PreviousIsSelected The previous tab (typically the tab on the left) is selected.
+
+    \sa selectedPosition
+*/
+
+/*!
+    \variable QStyleOptionTab::selectedPosition
+    \brief the position of the selected tab in relation to this tab
+
+    The default value is NotAdjacent, i.e. the tab is not adjacent to
+    a selected tab nor is it the selected tab.
+*/
+
+/*!
+    \variable QStyleOptionTab::cornerWidgets
+    \brief an OR combination of CornerWidget values indicating the
+    corner widgets of the tab bar
+
+    The default value is NoCornerWidgets.
+
+    \sa CornerWidget
+*/
+
+
+/*!
+    \variable QStyleOptionTab::shape
+    \brief the tab shape used to draw the tab; by default
+    QTabBar::RoundedNorth
+
+    \sa QTabBar::Shape
+*/
+
+/*!
+    \variable QStyleOptionTab::text
+    \brief the text of the tab
+
+    The default value is an empty string.
+*/
+
+/*!
+    \variable QStyleOptionTab::icon
+    \brief the icon for the tab
+
+    The default value is an empty icon, i.e. an icon with neither a
+    pixmap nor a filename.
+*/
+
+/*!
+    \variable QStyleOptionTab::row
+    \brief which row the tab is currently in
+
+    The default value is 0, indicating the front row.  Currently this
+    property can only be 0.
+*/
+
+/*!
+    \variable QStyleOptionTab::position
+    \brief the position of the tab in the tab bar
+
+    The default value is \l Beginning, i.e. the tab is the first tab
+    in the tab bar.
+*/
+
+/*!
+    \class QStyleOptionTabV2
+    \brief The QStyleOptionTabV2 class is used to describe the
+    parameters necessary for drawing a tabs in Qt 4.1 or above.
+
+    \since 4.1
+
+    An instance of the QStyleOptionTabV2 class has
+    \l{QStyleOption::type} {type} \l SO_Tab and
+    \l{QStyleOption::version} {version} 2. The type is used internally
+    by QStyleOption, its subclasses, and qstyleoption_cast() to
+    determine the type of style option. In general you do not need to
+    worry about this unless you want to create your own QStyleOption
+    subclass and your own styles. The version is used by QStyleOption
+    subclasses to implement extensions without breaking
+    compatibility. If you use qstyleoption_cast(), you normally do not
+    need to check it.
+
+    If you create your own QStyle subclass, you should handle both
+    QStyleOptionTab and QStyleOptionTabV2. One way to achieve this is
+    to use the QStyleOptionTabV2 copy constructor. For example:
+
+    \snippet doc/src/snippets/qstyleoption/main.cpp 3
+
+    In the example above: If \c tabOption's version is 1, the extra
+    member (\l iconSize) will be set to an invalid size for \c tabV2.
+    If \c tabOption's version is 2, the constructor will simply copy
+    the \c tab's iconSize.
+
+    For an example demonstrating how style options can be used, see
+    the \l {widgets/styles}{Styles} example.
+
+    \sa QStyleOptionTab, QStyleOption
+*/
+
+/*!
+    \enum QStyleOptionTabV2::StyleOptionVersion
+
+    This enum is used to hold information about the version of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Version 2
+
+    The version is used by QStyleOption subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+/*!
+    \variable QStyleOptionTabV2::iconSize
+    \brief the size for the icons
+
+    The default value is QSize(-1, -1), i.e. an invalid size; use
+    QStyle::pixelMetric() to find the default icon size for tab bars.
+
+    \sa QTabBar::iconSize()
+*/
+
+/*!
+    Constructs a QStyleOptionTabV2.
+*/
+QStyleOptionTabV2::QStyleOptionTabV2()
+    : QStyleOptionTab(Version)
+{
+}
+
+/*!
+    \internal
+*/
+QStyleOptionTabV2::QStyleOptionTabV2(int version)
+    : QStyleOptionTab(version)
+{
+}
+
+/*!
+    \fn QStyleOptionTabV2::QStyleOptionTabV2(const QStyleOptionTabV2 &other)
+
+    Constructs a copy of the \a other style option.
+*/
+
+/*!
+    Constructs a QStyleOptionTabV2 copy of the \a other style option
+    which can be either of the QStyleOptionTabV2 or QStyleOptionTab
+    types.
+
+    If the other style option's version is 1, the new style option's
+    \c iconSize is set to an invalid value. If its version is 2, its
+    \c iconSize value is simply copied to the new style option.
+*/
+QStyleOptionTabV2::QStyleOptionTabV2(const QStyleOptionTab &other)
+    : QStyleOptionTab(Version)
+{
+    if (const QStyleOptionTabV2 *tab = qstyleoption_cast<const QStyleOptionTabV2 *>(&other)) {
+        *this = *tab;
+    } else {
+        *((QStyleOptionTab *)this) = other;
+        version = Version;
+    }
+}
+
+/*!
+    Assigns the \a other style option to this QStyleOptionTabV2. The
+    \a other style option can be either of the QStyleOptionTabV2 or
+    QStyleOptionTab types.
+
+    If the other style option's version is 1, this style option's \c
+    iconSize is set to an invalid size. If its version is 2, its \c
+    iconSize value is simply copied to this style option.
+*/
+QStyleOptionTabV2 &QStyleOptionTabV2::operator=(const QStyleOptionTab &other)
+{
+    QStyleOptionTab::operator=(other);
+
+    if (const QStyleOptionTabV2 *tab = qstyleoption_cast<const QStyleOptionTabV2 *>(&other))
+        iconSize = tab->iconSize;
+    else
+        iconSize = QSize();
+    return *this;
+}
+
+/*!
+    \class QStyleOptionTabV3
+    \brief The QStyleOptionTabV3 class is used to describe the
+    parameters necessary for drawing a tabs in Qt 4.5 or above.
+
+    \since 4.5
+
+    An instance of the QStyleOptionTabV3 class has
+    \l{QStyleOption::type} {type} \l SO_Tab and
+    \l{QStyleOption::version} {version} 3. The type is used internally
+    by QStyleOption, its subclasses, and qstyleoption_cast() to
+    determine the type of style option. In general you do not need to
+    worry about this unless you want to create your own QStyleOption
+    subclass and your own styles. The version is used by QStyleOption
+    subclasses to implement extensions without breaking
+    compatibility. If you use qstyleoption_cast(), you normally do not
+    need to check it.
+
+    If you create your own QStyle subclass, you should handle both
+    QStyleOptionTab, QStyleOptionTabV2 and QStyleOptionTabV3.
+    One way to achieve this is to use the QStyleOptionTabV3 copy
+    constructor. For example:
+
+    \snippet doc/src/snippets/qstyleoption/main.cpp 3
+
+    In the example above: If \c tabOption's version is 1, the extra
+    member (\l{QStyleOptionTabV2::iconSize}{iconSize}) will be set to
+    an invalid size for \c tabV2.  If \c tabOption's version is 2, the
+    constructor will simply copy the \c tab's iconSize.
+
+    For an example demonstrating how style options can be used, see
+    the \l {widgets/styles}{Styles} example.
+
+    \sa QStyleOptionTab, QStyleOption
+*/
+
+/*!
+    \enum QStyleOptionTabV3::StyleOptionVersion
+
+    This enum is used to hold information about the version of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Version 3
+
+    The version is used by QStyleOption subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+/*!
+    \variable QStyleOptionTabV3::documentMode
+    \brief whether the tabbar is in document mode.
+
+    The default value is false;
+*/
+
+/*!
+    \variable QStyleOptionTabV3::leftButtonSize
+    \brief the size for the left widget on the tab.
+
+    The default value is QSize(-1, -1), i.e. an invalid size;
+*/
+
+/*!
+    \variable QStyleOptionTabV3::rightButtonSize
+    \brief the size for the right widget on the tab.
+
+    The default value is QSize(-1, -1), i.e. an invalid size;
+*/
+
+/*!
+    Constructs a QStyleOptionTabV3.
+*/
+
+QStyleOptionTabV3::QStyleOptionTabV3()
+    : QStyleOptionTabV2(Version)
+    , documentMode(false)
+{
+}
+
+/*!
+    \internal
+*/
+QStyleOptionTabV3::QStyleOptionTabV3(int version)
+    : QStyleOptionTabV2(version)
+{
+}
+
+/*!
+    \fn QStyleOptionTabV3::QStyleOptionTabV3(const QStyleOptionTabV3 &other)
+
+    Constructs a copy of the \a other style option.
+*/
+
+/*!
+    \fn QStyleOptionTabV3::QStyleOptionTabV3(const QStyleOptionTabV2 &other)
+
+    Constructs a copy of the \a other style option.
+*/
+
+/*!
+    Constructs a QStyleOptionTabV3 copy of the \a other style option
+    which can be either of the QStyleOptionTabV3, QStyleOptionTabV2
+    or QStyleOptionTab types.
+
+    If the other style option's version is 1 or 2, the new style option's
+    \c leftButtonSize and \c rightButtonSize is set to an invalid value.  If
+    its version is 3, its \c leftButtonSize and \c rightButtonSize values
+    are simply copied to the new style option.
+*/
+QStyleOptionTabV3::QStyleOptionTabV3(const QStyleOptionTab &other)
+    : QStyleOptionTabV2(Version)
+{
+    if (const QStyleOptionTabV3 *tab = qstyleoption_cast<const QStyleOptionTabV3 *>(&other)) {
+        *this = *tab;
+    } else {
+        *((QStyleOptionTabV2 *)this) = other;
+        version = Version;
+    }
+}
+
+/*!
+    Assigns the \a other style option to this QStyleOptionTabV3. The
+    \a other style option can be either of the QStyleOptionTabV3,
+    QStyleOptionTabV2 or QStyleOptionTab types.
+
+    If the other style option's version is 1 or 2, the new style option's
+    \c leftButtonSize and \c rightButtonSize is set to an invalid value.  If
+    its version is 3, its \c leftButtonSize and \c rightButtonSize values
+    are simply copied to the new style option.
+*/
+QStyleOptionTabV3 &QStyleOptionTabV3::operator=(const QStyleOptionTab &other)
+{
+    QStyleOptionTabV2::operator=(other);
+
+    if (const QStyleOptionTabV3 *tab = qstyleoption_cast<const QStyleOptionTabV3 *>(&other)) {
+        leftButtonSize = tab->leftButtonSize;
+        rightButtonSize = tab->rightButtonSize;
+    } else {
+        leftButtonSize = QSize();
+        rightButtonSize = QSize();
+        documentMode = false;
+    }
+    return *this;
+}
+
+#endif // QT_NO_TABBAR
+
+/*!
+    \class QStyleOptionProgressBar
+    \brief The QStyleOptionProgressBar class is used to describe the
+    parameters necessary for drawing a progress bar.
+
+    Since Qt 4.1, Qt uses the QStyleOptionProgressBarV2 subclass for
+    drawing QProgressBar.
+
+    An instance of the QStyleOptionProgressBar class has type
+    SO_ProgressBar and version 1.
+
+    The type is used internally by QStyleOption, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleOption subclass and your own styles.  The
+    version is used by QStyleOption subclasses to implement extensions
+    without breaking compatibility. If you use qstyleoption_cast(),
+    you normally do not need to check it.
+
+    If you create your own QStyle subclass, you should handle both
+    QStyleOptionProgressBar and QStyleOptionProgressBarV2.
+
+    For an example demonstrating how style options can be used, see
+    the \l {widgets/styles}{Styles} example.
+
+    \sa QStyleOptionProgressBarV2, QStyleOption
+*/
+
+/*!
+    Constructs a QStyleOptionProgressBar, initializing the members
+    variables to their default values.
+*/
+
+QStyleOptionProgressBar::QStyleOptionProgressBar()
+    : QStyleOption(QStyleOptionProgressBar::Version, SO_ProgressBar),
+      minimum(0), maximum(0), progress(0), textAlignment(Qt::AlignLeft), textVisible(false)
+{
+}
+
+/*!
+    \internal
+*/
+QStyleOptionProgressBar::QStyleOptionProgressBar(int version)
+    : QStyleOption(version, SO_ProgressBar),
+      minimum(0), maximum(0), progress(0), textAlignment(Qt::AlignLeft), textVisible(false)
+{
+}
+
+/*!
+    \fn QStyleOptionProgressBar::QStyleOptionProgressBar(const QStyleOptionProgressBar &other)
+
+    Constructs a copy of the \a other style option.
+*/
+
+/*!
+    \enum QStyleOptionProgressBar::StyleOptionType
+
+    This enum is used to hold information about the type of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Type The type of style option provided (\l{SO_ProgressBar} for this class).
+
+    The type is used internally by QStyleOption, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleOption subclass and your own styles.
+
+    \sa StyleOptionVersion
+*/
+
+/*!
+    \enum QStyleOptionProgressBar::StyleOptionVersion
+
+    This enum is used to hold information about the version of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Version 1
+
+    The version is used by QStyleOption subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+/*!
+    \variable QStyleOptionProgressBar::minimum
+    \brief the minimum value for the progress bar
+
+    This is the minimum value in the progress bar. The default value
+    is 0.
+
+    \sa QProgressBar::minimum
+*/
+
+/*!
+    \variable QStyleOptionProgressBar::maximum
+    \brief the maximum value for the progress bar
+
+    This is the maximum value in the progress bar. The default value
+    is 0.
+
+    \sa QProgressBar::maximum
+*/
+
+/*!
+    \variable QStyleOptionProgressBar::text
+    \brief the text for the progress bar
+
+    The progress bar text is usually just the progress expressed as a
+    string.  An empty string indicates that the progress bar has not
+    started yet. The default value is an empty string.
+
+    \sa QProgressBar::text
+*/
+
+/*!
+    \variable QStyleOptionProgressBar::textVisible
+    \brief a flag indicating whether or not text is visible
+
+    If this flag is true then the text is visible. Otherwise, the text
+    is not visible. The default value is false.
+
+    \sa QProgressBar::textVisible
+*/
+
+
+/*!
+    \variable QStyleOptionProgressBar::textAlignment
+    \brief the text alignment for the text in the QProgressBar
+
+    This can be used as a guide on where the text should be in the
+    progress bar. The default value is Qt::AlignLeft.
+*/
+
+/*!
+    \variable QStyleOptionProgressBar::progress
+    \brief the current progress for the progress bar
+
+    The current progress. A value of QStyleOptionProgressBar::minimum
+    - 1 indicates that the progress hasn't started yet. The default
+    value is 0.
+
+    \sa QProgressBar::value
+*/
+
+/*!
+    \class QStyleOptionProgressBarV2
+    \brief The QStyleOptionProgressBarV2 class is used to describe the
+    parameters necessary for drawing a progress bar in Qt 4.1 or above.
+
+    \since 4.1
+
+    An instance of this class has \l{QStyleOption::type} {type}
+    SO_ProgressBar and \l{QStyleOption::version} {version} 2.
+
+    The type is used internally by QStyleOption, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleOption subclass and your own styles. The
+    version is used by QStyleOption subclasses to implement extensions
+    without breaking compatibility. If you use qstyleoption_cast(),
+    you normally do not need to check it.
+
+    If you create your own QStyle subclass, you should handle both
+    QStyleOptionProgressBar and QStyleOptionProgressBarV2. One way
+    to achieve this is to use the QStyleOptionProgressBarV2 copy
+    constructor. For example:
+
+    \snippet doc/src/snippets/qstyleoption/main.cpp 2
+
+    In the example above: If the \c progressBarOption's version is 1,
+    the extra members (\l orientation, \l invertedAppearance, and \l
+    bottomToTop) are set to default values for \c progressBarV2. If
+    the \c progressBarOption's version is 2, the constructor will
+    simply copy the extra members to progressBarV2.
+
+    For an example demonstrating how style options can be used, see
+    the \l {widgets/styles}{Styles} example.
+
+    \sa QStyleOptionProgressBar, QStyleOption
+*/
+
+/*!
+    Constructs a QStyleOptionProgressBarV2, initializing he members
+    variables to their default values.
+*/
+
+QStyleOptionProgressBarV2::QStyleOptionProgressBarV2()
+    : QStyleOptionProgressBar(2),
+      orientation(Qt::Horizontal), invertedAppearance(false), bottomToTop(false)
+{
+}
+
+/*!
+    \internal
+*/
+QStyleOptionProgressBarV2::QStyleOptionProgressBarV2(int version)
+    : QStyleOptionProgressBar(version),
+      orientation(Qt::Horizontal), invertedAppearance(false), bottomToTop(false)
+{
+}
+
+/*!
+    Constructs a copy of the \a other style option which can be either
+    of the QStyleOptionProgressBar and QStyleOptionProgressBarV2
+    types.
+
+    If the \a{other} style option's version is 1, the extra members (\l
+    orientation, \l invertedAppearance, and \l bottomToTop) are set
+    to default values for the new style option. If \a{other}'s version
+    is 2, the extra members are simply copied.
+
+    \sa version
+*/
+QStyleOptionProgressBarV2::QStyleOptionProgressBarV2(const QStyleOptionProgressBar &other)
+    : QStyleOptionProgressBar(2), orientation(Qt::Horizontal), invertedAppearance(false), bottomToTop(false)
+{
+    const QStyleOptionProgressBarV2 *pb2 = qstyleoption_cast<const QStyleOptionProgressBarV2 *>(&other);
+    if (pb2)
+        *this = *pb2;
+    else
+        *((QStyleOptionProgressBar *)this) = other;
+}
+
+/*!
+    Constructs a copy of the \a other style option.
+*/
+QStyleOptionProgressBarV2::QStyleOptionProgressBarV2(const QStyleOptionProgressBarV2 &other)
+    : QStyleOptionProgressBar(2), orientation(Qt::Horizontal), invertedAppearance(false), bottomToTop(false)
+{
+    *this = other;
+}
+
+/*!
+    Assigns the \a other style option to this style option. The \a
+    other style option can be either of the QStyleOptionProgressBarV2
+    or QStyleOptionProgressBar types.
+
+    If the \a{other} style option's version is 1, the extra members
+    (\l orientation, \l invertedAppearance, and \l bottomToTop) are
+    set to default values for this style option. If \a{other}'s
+    version is 2, the extra members are simply copied to this style
+    option.
+*/
+QStyleOptionProgressBarV2 &QStyleOptionProgressBarV2::operator=(const QStyleOptionProgressBar &other)
+{
+    QStyleOptionProgressBar::operator=(other);
+
+    const QStyleOptionProgressBarV2 *pb2 = qstyleoption_cast<const QStyleOptionProgressBarV2 *>(&other);
+    orientation = pb2 ? pb2->orientation : Qt::Horizontal;
+    invertedAppearance = pb2 ? pb2->invertedAppearance : false;
+    bottomToTop = pb2 ? pb2->bottomToTop : false;
+    return *this;
+}
+
+/*!
+    \variable QStyleOptionProgressBarV2::orientation
+    \brief the progress bar's orientation (horizontal or vertical);
+    the default orentation is Qt::Horizontal
+
+    \sa QProgressBar::orientation
+*/
+
+/*!
+    \variable QStyleOptionProgressBarV2::invertedAppearance
+    \brief whether the progress bar's appearance is inverted
+
+    The default value is false.
+
+    \sa QProgressBar::invertedAppearance
+*/
+
+/*!
+    \variable QStyleOptionProgressBarV2::bottomToTop
+    \brief whether the text reads from bottom to top when the progress
+    bar is vertical
+
+    The default value is false.
+
+    \sa QProgressBar::textDirection
+*/
+
+/*!
+    \enum QStyleOptionProgressBarV2::StyleOptionType
+
+    This enum is used to hold information about the type of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Type The type of style option provided (\l{SO_ProgressBar} for this class).
+
+    The type is used internally by QStyleOption, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleOption subclass and your own styles.
+
+    \sa StyleOptionVersion
+*/
+
+/*!
+    \enum QStyleOptionProgressBarV2::StyleOptionVersion
+
+    This enum is used to hold information about the version of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Version 2
+
+    The version is used by QStyleOption subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+
+/*!
+    \class QStyleOptionMenuItem
+    \brief The QStyleOptionMenuItem class is used to describe the
+    parameter necessary for drawing a menu item.
+
+    QStyleOptionMenuItem contains all the information that QStyle
+    functions need to draw the menu items from \l QMenu. It is also
+    used for drawing other menu-related widgets.
+
+    For performance reasons, the access to the member variables is
+    direct (i.e., using the \c . or \c -> operator). This low-level feel
+    makes the structures straightforward to use and emphasizes that
+    these are simply parameters used by the style functions.
+
+    For an example demonstrating how style options can be used, see
+    the \l {widgets/styles}{Styles} example.
+
+    \sa QStyleOption
+*/
+
+/*!
+    Constructs a QStyleOptionMenuItem, initializing the members
+    variables to their default values.
+*/
+
+QStyleOptionMenuItem::QStyleOptionMenuItem()
+    : QStyleOption(QStyleOptionMenuItem::Version, SO_MenuItem), menuItemType(Normal),
+      checkType(NotCheckable), checked(false), menuHasCheckableItems(true), maxIconWidth(0), tabWidth(0)
+{
+}
+
+/*!
+    \internal
+*/
+QStyleOptionMenuItem::QStyleOptionMenuItem(int version)
+    : QStyleOption(version, SO_MenuItem), menuItemType(Normal),
+      checkType(NotCheckable), checked(false), menuHasCheckableItems(true), maxIconWidth(0), tabWidth(0)
+{
+}
+
+/*!
+    \fn QStyleOptionMenuItem::QStyleOptionMenuItem(const QStyleOptionMenuItem &other)
+
+    Constructs a copy of the \a other style option.
+*/
+
+/*!
+    \enum QStyleOptionMenuItem::StyleOptionType
+
+    This enum is used to hold information about the type of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Type The type of style option provided (\l{SO_MenuItem} for this class).
+
+    The type is used internally by QStyleOption, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleOption subclass and your own styles.
+
+    \sa StyleOptionVersion
+*/
+
+/*!
+    \enum QStyleOptionMenuItem::StyleOptionVersion
+
+    This enum is used to hold information about the version of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Version 1
+
+    The version is used by QStyleOption subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+/*!
+    \enum QStyleOptionMenuItem::MenuItemType
+
+    This enum indicates the type of menu item that the structure describes.
+
+    \value Normal A normal menu item.
+    \value DefaultItem A menu item that is the default action as specified with \l QMenu::defaultAction().
+    \value Separator A menu separator.
+    \value SubMenu Indicates the menu item points to a sub-menu.
+    \value Scroller A popup menu scroller (currently only used on Mac OS X).
+    \value TearOff A tear-off handle for the menu.
+    \value Margin The margin of the menu.
+    \value EmptyArea The empty area of the menu.
+
+    \sa menuItemType
+*/
+
+/*!
+    \enum QStyleOptionMenuItem::CheckType
+
+    This enum is used to indicate whether or not a check mark should be
+    drawn for the item, or even if it should be drawn at all.
+
+    \value NotCheckable The item is not checkable.
+    \value Exclusive The item is an exclusive check item (like a radio button).
+    \value NonExclusive The item is a non-exclusive check item (like a check box).
+
+    \sa checkType, QAction::checkable, QAction::checked, QActionGroup::exclusive
+*/
+
+/*!
+    \variable QStyleOptionMenuItem::menuItemType
+    \brief the type of menu item
+
+    The default value is \l Normal.
+
+    \sa MenuItemType
+*/
+
+/*!
+    \variable QStyleOptionMenuItem::checkType
+    \brief the type of checkmark of the menu item
+
+    The default value is \l NotCheckable.
+
+    \sa CheckType
+*/
+
+/*!
+    \variable QStyleOptionMenuItem::checked
+    \brief whether the menu item is checked or not
+
+    The default value is false.
+*/
+
+/*!
+    \variable QStyleOptionMenuItem::menuHasCheckableItems
+    \brief whether the menu as a whole has checkable items or not
+
+    The default value is true.
+
+    If this option is set to false, then the menu has no checkable
+    items. This makes it possible for GUI styles to save some
+    horizontal space that would normally be used for the check column.
+*/
+
+/*!
+    \variable QStyleOptionMenuItem::menuRect
+    \brief the rectangle for the entire menu
+
+    The default value is a null rectangle, i.e. a rectangle with both
+    the width and the height set to 0.
+*/
+
+/*!
+    \variable QStyleOptionMenuItem::text
+    \brief the text for the menu item
+
+    Note that the text format is something like this "Menu
+    text\bold{\\t}Shortcut".
+
+    If the menu item doesn't have a shortcut, it will just contain the
+    menu item's text. The default value is an empty string.
+*/
+
+/*!
+    \variable QStyleOptionMenuItem::icon
+    \brief the icon for the menu item
+
+    The default value is an empty icon, i.e. an icon with neither a
+    pixmap nor a filename.
+*/
+
+/*!
+    \variable QStyleOptionMenuItem::maxIconWidth
+    \brief the maximum icon width for the icon in the menu item
+
+    This can be used for drawing the icon into the correct place or
+    properly aligning items. The variable must be set regardless of
+    whether or not the menu item has an icon. The default value is 0.
+*/
+
+/*!
+    \variable QStyleOptionMenuItem::tabWidth
+    \brief the tab width for the menu item
+
+    The tab width is the distance between the text of the menu item
+    and the shortcut. The default value is 0.
+*/
+
+
+/*!
+    \variable QStyleOptionMenuItem::font
+    \brief the font used for the menu item text
+
+    This is the font that should be used for drawing the menu text
+    minus the shortcut. The shortcut is usually drawn using the
+    painter's font. By default, the application's default font is
+    used.
+*/
+
+/*!
+    \class QStyleOptionComplex
+    \brief The QStyleOptionComplex class is used to hold parameters that are
+    common to all complex controls.
+
+    This class is not used on its own. Instead it is used to derive
+    other complex control options, for example QStyleOptionSlider and
+    QStyleOptionSpinBox.
+
+    For performance reasons, the access to the member variables is
+    direct (i.e., using the \c . or \c -> operator).
+
+    For an example demonstrating how style options can be used, see
+    the \l {widgets/styles}{Styles} example.
+
+    \sa QStyleOption
+*/
+
+/*!
+    Constructs a QStyleOptionComplex of the specified \a type and \a
+    version, initializing the member variables to their default
+    values. This constructor is usually called by subclasses.
+*/
+
+QStyleOptionComplex::QStyleOptionComplex(int version, int type)
+    : QStyleOption(version, type), subControls(QStyle::SC_All), activeSubControls(QStyle::SC_None)
+{
+}
+
+/*!
+    \fn QStyleOptionComplex::QStyleOptionComplex(const QStyleOptionComplex &other)
+
+    Constructs a copy of the \a other style option.
+*/
+
+/*!
+    \enum QStyleOptionComplex::StyleOptionType
+
+    This enum is used to hold information about the type of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Type The type of style option provided (\l{SO_Complex} for this class).
+
+    The type is used internally by QStyleOption, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleOption subclass and your own styles.
+
+    \sa StyleOptionVersion
+*/
+
+/*!
+    \enum QStyleOptionComplex::StyleOptionVersion
+
+    This enum is used to hold information about the version of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Version 1
+
+    The version is used by QStyleOption subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+/*!
+    \variable QStyleOptionComplex::subControls
+    \brief a bitwise OR of the various sub-controls that need to be
+    drawn for the complex control
+
+    The default value is QStyle::SC_All.
+
+    \sa QStyle::SubControl
+*/
+
+/*!
+    \variable QStyleOptionComplex::activeSubControls
+    \brief a bitwise OR of the various sub-controls that are active
+    (pressed) for the complex control
+
+    The default value is QStyle::SC_None.
+
+    \sa QStyle::SubControl
+*/
+
+#ifndef QT_NO_SLIDER
+/*!
+    \class QStyleOptionSlider
+    \brief The QStyleOptionSlider class is used to describe the
+    parameters needed for drawing a slider.
+
+    QStyleOptionSlider contains all the information that QStyle
+    functions need to draw QSlider and QScrollBar.
+
+    For performance reasons, the access to the member variables is
+    direct (i.e., using the \c . or \c -> operator). This low-level feel
+    makes the structures straightforward to use and emphasizes that
+    these are simply parameters used by the style functions.
+
+    For an example demonstrating how style options can be used, see
+    the \l {widgets/styles}{Styles} example.
+
+    \sa QStyleOptionComplex, QSlider, QScrollBar
+*/
+
+/*!
+    Constructs a QStyleOptionSlider, initializing the members
+    variables to their default values.
+*/
+
+QStyleOptionSlider::QStyleOptionSlider()
+    : QStyleOptionComplex(Version, SO_Slider), orientation(Qt::Horizontal), minimum(0), maximum(0),
+      tickPosition(QSlider::NoTicks), tickInterval(0), upsideDown(false),
+      sliderPosition(0), sliderValue(0), singleStep(0), pageStep(0), notchTarget(0.0),
+      dialWrapping(false)
+{
+}
+
+/*!
+    \internal
+*/
+QStyleOptionSlider::QStyleOptionSlider(int version)
+    : QStyleOptionComplex(version, SO_Slider), orientation(Qt::Horizontal), minimum(0), maximum(0),
+      tickPosition(QSlider::NoTicks), tickInterval(0), upsideDown(false),
+      sliderPosition(0), sliderValue(0), singleStep(0), pageStep(0), notchTarget(0.0),
+      dialWrapping(false)
+{
+}
+
+/*!
+    \fn QStyleOptionSlider::QStyleOptionSlider(const QStyleOptionSlider &other)
+
+    Constructs a copy of the \a other style option.
+*/
+
+/*!
+    \enum QStyleOptionSlider::StyleOptionType
+
+    This enum is used to hold information about the type of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Type The type of style option provided (\l{SO_Slider} for this class).
+
+    The type is used internally by QStyleOption, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleOption subclass and your own styles.
+
+    \sa StyleOptionVersion
+*/
+
+/*!
+    \enum QStyleOptionSlider::StyleOptionVersion
+
+    This enum is used to hold information about the version of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Version 1
+
+    The version is used by QStyleOption subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+/*!
+    \variable QStyleOptionSlider::orientation
+    \brief the slider's orientation (horizontal or vertical)
+
+    The default orientation is Qt::Horizontal.
+
+    \sa Qt::Orientation
+*/
+
+/*!
+    \variable QStyleOptionSlider::minimum
+    \brief the minimum value for the slider
+
+    The default value is 0.
+*/
+
+/*!
+    \variable QStyleOptionSlider::maximum
+    \brief the maximum value for the slider
+
+    The default value is 0.
+*/
+
+/*!
+    \variable QStyleOptionSlider::tickPosition
+    \brief the position of the slider's tick marks, if any
+
+    The default value is QSlider::NoTicks.
+
+    \sa QSlider::TickPosition
+*/
+
+/*!
+    \variable QStyleOptionSlider::tickInterval
+    \brief the interval that should be drawn between tick marks
+
+    The default value is 0.
+*/
+
+/*!
+    \variable QStyleOptionSlider::notchTarget
+    \brief the number of pixel between notches
+
+    The default value is 0.0.
+
+    \sa QDial::notchTarget()
+*/
+
+/*!
+    \variable QStyleOptionSlider::dialWrapping
+    \brief whether the dial should wrap or not
+
+    The default value is false, i.e. the dial is not wrapped.
+
+    \sa QDial::wrapping()
+*/
+
+/*!
+    \variable QStyleOptionSlider::upsideDown
+    \brief the slider control orientation
+
+    Normally a slider increases as it moves up or to the right;
+    upsideDown indicates that it should do the opposite (increase as
+    it moves down or to the left).  The default value is false,
+    i.e. the slider increases as it moves up or to the right.
+
+    \sa QStyle::sliderPositionFromValue(),
+    QStyle::sliderValueFromPosition(),
+    QAbstractSlider::invertedAppearance
+*/
+
+/*!
+    \variable QStyleOptionSlider::sliderPosition
+    \brief the position of the slider handle
+
+    If the slider has active feedback (i.e.,
+    QAbstractSlider::tracking is true), this value will be the same as
+    \l sliderValue. Otherwise, it will have the current position of
+    the handle. The default value is 0.
+
+    \sa QAbstractSlider::tracking, sliderValue
+*/
+
+/*!
+    \variable QStyleOptionSlider::sliderValue
+    \brief the value of the slider
+
+    If the slider has active feedback (i.e.,
+    QAbstractSlider::tracking is true), this value will be the same
+    as \l sliderPosition. Otherwise, it will have the value the
+    slider had before the mouse was pressed.
+
+    The default value is 0.
+
+    \sa QAbstractSlider::tracking sliderPosition
+*/
+
+/*!
+    \variable QStyleOptionSlider::singleStep
+    \brief the size of the single step of the slider
+
+    The default value is 0.
+
+    \sa QAbstractSlider::singleStep
+*/
+
+/*!
+    \variable QStyleOptionSlider::pageStep
+    \brief the size of the page step of the slider
+
+    The default value is 0.
+
+    \sa QAbstractSlider::pageStep
+*/
+#endif // QT_NO_SLIDER
+
+#ifndef QT_NO_SPINBOX
+/*!
+    \class QStyleOptionSpinBox
+    \brief The QStyleOptionSpinBox class is used to describe the
+    parameters necessary for drawing a spin box.
+
+    QStyleOptionSpinBox contains all the information that QStyle
+    functions need to draw QSpinBox and QDateTimeEdit.
+
+    For performance reasons, the access to the member variables is
+    direct (i.e., using the \c . or \c -> operator). This low-level feel
+    makes the structures straightforward to use and emphasizes that
+    these are simply parameters used by the style functions.
+
+    For an example demonstrating how style options can be used, see
+    the \l {widgets/styles}{Styles} example.
+
+    \sa QStyleOption, QStyleOptionComplex
+*/
+
+/*!
+    Constructs a QStyleOptionSpinBox, initializing the members
+    variables to their default values.
+*/
+
+QStyleOptionSpinBox::QStyleOptionSpinBox()
+    : QStyleOptionComplex(Version, SO_SpinBox), buttonSymbols(QAbstractSpinBox::UpDownArrows),
+      stepEnabled(QAbstractSpinBox::StepNone), frame(false)
+{
+}
+
+/*!
+    \internal
+*/
+QStyleOptionSpinBox::QStyleOptionSpinBox(int version)
+    : QStyleOptionComplex(version, SO_SpinBox), buttonSymbols(QAbstractSpinBox::UpDownArrows),
+      stepEnabled(QAbstractSpinBox::StepNone), frame(false)
+{
+}
+
+/*!
+    \fn QStyleOptionSpinBox::QStyleOptionSpinBox(const QStyleOptionSpinBox &other)
+
+    Constructs a copy of the \a other style option.
+*/
+
+/*!
+    \enum QStyleOptionSpinBox::StyleOptionType
+
+    This enum is used to hold information about the type of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Type The type of style option provided (\l{SO_SpinBox} for this class).
+
+    The type is used internally by QStyleOption, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleOption subclass and your own styles.
+
+    \sa StyleOptionVersion
+*/
+
+/*!
+    \enum QStyleOptionSpinBox::StyleOptionVersion
+
+    This enum is used to hold information about the version of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Version 1
+
+    The version is used by QStyleOption subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+/*!
+    \variable QStyleOptionSpinBox::buttonSymbols
+    \brief the type of button symbols to draw for the spin box
+
+    The default value is QAbstractSpinBox::UpDownArrows specufying
+    little arrows in the classic style.
+
+    \sa QAbstractSpinBox::ButtonSymbols
+*/
+
+/*!
+    \variable QStyleOptionSpinBox::stepEnabled
+    \brief which buttons of the spin box that are enabled
+
+    The default value is QAbstractSpinBox::StepNone.
+
+    \sa QAbstractSpinBox::StepEnabled
+*/
+
+/*!
+    \variable QStyleOptionSpinBox::frame
+    \brief whether the spin box has a frame
+
+    The default value is false, i.e. the spin box has no frame.
+*/
+#endif // QT_NO_SPINBOX
+
+/*!
+    \class QStyleOptionQ3ListViewItem
+    \brief The QStyleOptionQ3ListViewItem class is used to describe an
+    item drawn in a Q3ListView.
+
+    This class is used for drawing the compatibility Q3ListView's
+    items. \bold {It is not recommended for new classes}.
+
+    QStyleOptionQ3ListViewItem contains all the information that
+    QStyle functions need to draw the Q3ListView items.
+
+    For performance reasons, the access to the member variables is
+    direct (i.e., using the \c . or \c -> operator). This low-level feel
+    makes the structures straightforward to use and emphasizes that
+    these are simply parameters used by the style functions.
+
+    For an example demonstrating how style options can be used, see
+    the \l {widgets/styles}{Styles} example.
+
+    \sa QStyleOption, QStyleOptionQ3ListView, Q3ListViewItem
+*/
+
+/*!
+    \enum QStyleOptionQ3ListViewItem::Q3ListViewItemFeature
+
+    This enum describes the features a list view item can have.
+
+    \value None A standard item.
+    \value Expandable The item has children that can be shown.
+    \value MultiLine The item is more than one line tall.
+    \value Visible The item is visible.
+    \value ParentControl The item's parent is a type of item control (Q3CheckListItem::Controller).
+
+    \sa features, Q3ListViewItem::isVisible(), Q3ListViewItem::multiLinesEnabled(),
+        Q3ListViewItem::isExpandable()
+*/
+
+/*!
+    Constructs a QStyleOptionQ3ListViewItem, initializing the members
+    variables to their default values.
+*/
+
+QStyleOptionQ3ListViewItem::QStyleOptionQ3ListViewItem()
+    : QStyleOption(Version, SO_Q3ListViewItem), features(None), height(0), totalHeight(0),
+      itemY(0), childCount(0)
+{
+}
+
+/*!
+    \internal
+*/
+QStyleOptionQ3ListViewItem::QStyleOptionQ3ListViewItem(int version)
+    : QStyleOption(version, SO_Q3ListViewItem), features(None), height(0), totalHeight(0),
+      itemY(0), childCount(0)
+{
+}
+
+/*!
+    \fn QStyleOptionQ3ListViewItem::QStyleOptionQ3ListViewItem(const QStyleOptionQ3ListViewItem &other)
+
+    Constructs a copy of the \a other style option.
+*/
+
+/*!
+    \enum QStyleOptionQ3ListViewItem::StyleOptionType
+
+    This enum is used to hold information about the type of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Type The type of style option provided (\l{SO_Q3ListViewItem} for this class).
+
+    The type is used internally by QStyleOption, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleOption subclass and your own styles.
+
+    \sa StyleOptionVersion
+*/
+
+/*!
+    \enum QStyleOptionQ3ListViewItem::StyleOptionVersion
+
+    This enum is used to hold information about the version of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Version 1
+
+    The version is used by QStyleOption subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+/*!
+    \variable QStyleOptionQ3ListViewItem::features
+    \brief the features for this item
+
+    This variable is a bitwise OR of the features of the item. The deafult value is \l None.
+
+    \sa Q3ListViewItemFeature
+*/
+
+/*!
+    \variable QStyleOptionQ3ListViewItem::height
+    \brief the height of the item
+
+    This doesn't include the height of the item's children. The default height is 0.
+
+    \sa Q3ListViewItem::height()
+*/
+
+/*!
+    \variable QStyleOptionQ3ListViewItem::totalHeight
+    \brief the total height of the item, including its children
+
+    The default total height is 0.
+
+    \sa Q3ListViewItem::totalHeight()
+*/
+
+/*!
+    \variable QStyleOptionQ3ListViewItem::itemY
+    \brief the Y-coordinate for the item
+
+    The default value is 0.
+
+    \sa Q3ListViewItem::itemPos()
+*/
+
+/*!
+    \variable QStyleOptionQ3ListViewItem::childCount
+    \brief the number of children the item has
+*/
+
+/*!
+    \class QStyleOptionQ3ListView
+    \brief The QStyleOptionQ3ListView class is used to describe the
+    parameters for drawing a Q3ListView.
+
+    This class is used for drawing the compatibility Q3ListView. \bold
+    {It is not recommended for new classes}.
+
+    QStyleOptionQ3ListView contains all the information that QStyle
+    functions need to draw Q3ListView.
+
+    For performance reasons, the access to the member variables is
+    direct (i.e., using the \c . or \c -> operator). This low-level feel
+    makes the structures straightforward to use and emphasizes that
+    these are simply parameters used by the style functions.
+
+    For an example demonstrating how style options can be used, see
+    the \l {widgets/styles}{Styles} example.
+
+    \sa QStyleOptionComplex, Q3ListView, QStyleOptionQ3ListViewItem
+*/
+
+/*!
+    Creates a QStyleOptionQ3ListView, initializing the members
+    variables to their default values.
+*/
+
+QStyleOptionQ3ListView::QStyleOptionQ3ListView()
+    : QStyleOptionComplex(Version, SO_Q3ListView), viewportBGRole(QPalette::Base),
+      sortColumn(0), itemMargin(0), treeStepSize(0), rootIsDecorated(false)
+{
+}
+
+/*!
+    \internal
+*/
+QStyleOptionQ3ListView::QStyleOptionQ3ListView(int version)
+    : QStyleOptionComplex(version, SO_Q3ListView),  viewportBGRole(QPalette::Base),
+      sortColumn(0), itemMargin(0), treeStepSize(0), rootIsDecorated(false)
+{
+}
+
+/*!
+    \fn QStyleOptionQ3ListView::QStyleOptionQ3ListView(const QStyleOptionQ3ListView &other)
+
+    Constructs a copy of the \a other style option.
+*/
+
+/*!
+    \enum QStyleOptionQ3ListView::StyleOptionType
+
+    This enum is used to hold information about the type of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Type The type of style option provided (\l{SO_Q3ListView} for this class).
+
+    The type is used internally by QStyleOption, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleOption subclass and your own styles.
+
+    \sa StyleOptionVersion
+*/
+
+/*!
+    \enum QStyleOptionQ3ListView::StyleOptionVersion
+
+    This enum is used to hold information about the version of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Version 1
+
+    The version is used by QStyleOption subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+/*!
+    \variable QStyleOptionQ3ListView::items
+    \brief a list of items in the Q3ListView
+
+    This is a list of \l {QStyleOptionQ3ListViewItem}s. The first item
+    can be used for most of the calculation that are needed for
+    drawing a list view. Any additional items are the children of
+    this first item, which may be used for additional information.
+
+    \sa QStyleOptionQ3ListViewItem
+*/
+
+/*!
+    \variable QStyleOptionQ3ListView::viewportPalette
+    \brief the palette of Q3ListView's viewport
+
+    By default, the application's default palette is used.
+*/
+
+/*!
+    \variable QStyleOptionQ3ListView::viewportBGRole
+    \brief the background role of Q3ListView's viewport
+
+    The default value is QPalette::Base.
+
+    \sa QWidget::backgroundRole()
+*/
+
+/*!
+    \variable QStyleOptionQ3ListView::sortColumn
+    \brief the sort column of the list view
+
+    The default value is 0.
+
+    \sa Q3ListView::sortColumn()
+*/
+
+/*!
+    \variable QStyleOptionQ3ListView::itemMargin
+    \brief the margin for items in the list view
+
+    The default value is 0.
+
+    \sa Q3ListView::itemMargin()
+*/
+
+/*!
+    \variable QStyleOptionQ3ListView::treeStepSize
+    \brief the number of pixel to offset children items from their
+    parents
+
+    The default value is 0.
+
+    \sa Q3ListView::treeStepSize()
+*/
+
+/*!
+    \variable QStyleOptionQ3ListView::rootIsDecorated
+    \brief whether root items are decorated
+
+    The default value is false.
+
+    \sa Q3ListView::rootIsDecorated()
+*/
+
+/*!
+    \class QStyleOptionQ3DockWindow
+    \brief The QStyleOptionQ3DockWindow class is used to describe the
+    parameters for drawing various parts of a Q3DockWindow.
+
+    This class is used for drawing the old Q3DockWindow and its
+    parts. \bold {It is not recommended for new classes}.
+
+    QStyleOptionQ3DockWindow contains all the information that QStyle
+    functions need to draw Q3DockWindow and its parts.
+
+    For performance reasons, the access to the member variables is
+    direct (i.e., using the \c . or \c -> operator). This low-level feel
+    makes the structures straightforward to use and emphasizes that
+    these are simply parameters used by the style functions.
+
+    For an example demonstrating how style options can be used, see
+    the \l {widgets/styles}{Styles} example.
+
+    \sa QStyleOption,  Q3DockWindow
+*/
+
+/*!
+    Constructs a QStyleOptionQ3DockWindow, initializing the member
+    variables to their default values.
+*/
+
+QStyleOptionQ3DockWindow::QStyleOptionQ3DockWindow()
+    : QStyleOption(Version, SO_Q3DockWindow), docked(false), closeEnabled(false)
+{
+}
+
+/*!
+    \internal
+*/
+QStyleOptionQ3DockWindow::QStyleOptionQ3DockWindow(int version)
+    : QStyleOption(version, SO_Q3DockWindow), docked(false), closeEnabled(false)
+{
+}
+
+/*!
+    \fn QStyleOptionQ3DockWindow::QStyleOptionQ3DockWindow(const QStyleOptionQ3DockWindow &other)
+
+    Constructs a copy of the \a other style option.
+*/
+
+/*!
+    \enum QStyleOptionQ3DockWindow::StyleOptionType
+
+    This enum is used to hold information about the type of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Type The type of style option provided (\l{SO_Q3DockWindow} for this class).
+
+    The type is used internally by QStyleOption, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleOption subclass and your own styles.
+
+    \sa StyleOptionVersion
+*/
+
+/*!
+    \enum QStyleOptionQ3DockWindow::StyleOptionVersion
+
+    This enum is used to hold information about the version of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Version 1
+
+    The version is used by QStyleOption subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+/*!
+    \variable QStyleOptionQ3DockWindow::docked
+    \brief whether the dock window is currently docked
+
+    The default value is false.
+*/
+
+/*!
+    \variable QStyleOptionQ3DockWindow::closeEnabled
+    \brief whether the dock window has a close button
+
+    The default value is false.
+*/
+
+/*!
+    \class QStyleOptionDockWidget
+    \brief The QStyleOptionDockWidget class is used to describe the
+    parameters for drawing a dock widget.
+
+    QStyleOptionDockWidget contains all the information that QStyle
+    functions need to draw graphical elements like QDockWidget.
+
+    For performance reasons, the access to the member variables is
+    direct (i.e., using the \c . or \c -> operator). This low-level feel
+    makes the structures straightforward to use and emphasizes that
+    these are simply parameters used by the style functions.
+
+    For an example demonstrating how style options can be used, see
+    the \l {widgets/styles}{Styles} example.
+
+    \sa QStyleOption
+*/
+
+/*!
+    Constructs a QStyleOptionDockWidget, initializing the member
+    variables to their default values.
+*/
+
+QStyleOptionDockWidget::QStyleOptionDockWidget()
+    : QStyleOption(Version, SO_DockWidget), movable(false)
+{
+}
+
+/*!
+    \internal
+*/
+QStyleOptionDockWidget::QStyleOptionDockWidget(int version)
+    : QStyleOption(version, SO_DockWidget), closable(false),
+      movable(false), floatable(false)
+{
+}
+
+QStyleOptionDockWidgetV2::QStyleOptionDockWidgetV2()
+    : QStyleOptionDockWidget(Version), verticalTitleBar(false)
+{
+}
+
+QStyleOptionDockWidgetV2::QStyleOptionDockWidgetV2(
+                                    const QStyleOptionDockWidget &other)
+    : QStyleOptionDockWidget(Version)
+{
+    (void)QStyleOptionDockWidgetV2::operator=(other);
+}
+
+QStyleOptionDockWidgetV2 &QStyleOptionDockWidgetV2::operator = (
+                                    const QStyleOptionDockWidget &other)
+{
+    QStyleOptionDockWidget::operator=(other);
+    const QStyleOptionDockWidgetV2 *v2
+        = qstyleoption_cast<const QStyleOptionDockWidgetV2*>(&other);
+    verticalTitleBar = v2 ? v2->verticalTitleBar : false;
+    return *this;
+}
+
+QStyleOptionDockWidgetV2::QStyleOptionDockWidgetV2(int version)
+    : QStyleOptionDockWidget(version), verticalTitleBar(false)
+{
+}
+
+/*!
+    \fn QStyleOptionDockWidget::QStyleOptionDockWidget(const QStyleOptionDockWidget &other)
+
+    Constructs a copy of the \a other style option.
+*/
+
+/*!
+    \enum QStyleOptionDockWidget::StyleOptionType
+
+    This enum is used to hold information about the type of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Type The type of style option provided (\l{SO_DockWidget} for this class).
+
+    The type is used internally by QStyleOption, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleOption subclass and your own styles.
+
+    \sa StyleOptionVersion
+*/
+
+/*!
+    \enum QStyleOptionDockWidget::StyleOptionVersion
+
+    This enum is used to hold information about the version of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Version 1
+
+    The version is used by QStyleOption subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+/*!
+    \variable QStyleOptionDockWidget::title
+    \brief the title of the dock window
+
+    The default value is an empty string.
+*/
+
+/*!
+    \variable QStyleOptionDockWidget::closable
+    \brief whether the dock window is closable
+
+    The default value is true.
+*/
+
+/*!
+    \variable QStyleOptionDockWidget::movable
+    \brief whether the dock window is movable
+
+    The default value is false.
+*/
+
+/*!
+    \variable QStyleOptionDockWidget::floatable
+    \brief whether the dock window is floatable
+
+    The default value is true.
+*/
+
+/*!
+    \class QStyleOptionToolButton
+    \brief The QStyleOptionToolButton class is used to describe the
+    parameters for drawing a tool button.
+
+    QStyleOptionToolButton contains all the information that QStyle
+    functions need to draw QToolButton.
+
+    For performance reasons, the access to the member variables is
+    direct (i.e., using the \c . or \c -> operator). This low-level feel
+    makes the structures straightforward to use and emphasizes that
+    these are simply parameters used by the style functions.
+
+    For an example demonstrating how style options can be used, see
+    the \l {widgets/styles}{Styles} example.
+
+    \sa QStyleOption, QStyleOptionComplex, QStyleOptionButton
+*/
+
+/*!
+    \enum QStyleOptionToolButton::ToolButtonFeature
+    Describes the various features that a tool button can have.
+
+    \value None A normal tool button.
+    \value Arrow The tool button is an arrow.
+    \value Menu The tool button has a menu.
+    \value PopupDelay There is a delay to showing the menu.
+    \value HasMenu The button has a popup menu.
+    \value MenuButtonPopup The button should display an arrow to
+           indicate that a menu is present.
+
+    \sa features, QToolButton::toolButtonStyle(), QToolButton::popupMode()
+*/
+
+/*!
+    Constructs a QStyleOptionToolButton, initializing the members
+    variables to their default values.
+*/
+
+QStyleOptionToolButton::QStyleOptionToolButton()
+    : QStyleOptionComplex(Version, SO_ToolButton), features(None), arrowType(Qt::DownArrow)
+    , toolButtonStyle(Qt::ToolButtonIconOnly)
+{
+}
+
+/*!
+    \internal
+*/
+QStyleOptionToolButton::QStyleOptionToolButton(int version)
+    : QStyleOptionComplex(version, SO_ToolButton), features(None), arrowType(Qt::DownArrow)
+    , toolButtonStyle(Qt::ToolButtonIconOnly)
+
+{
+}
+
+/*!
+    \fn QStyleOptionToolButton::QStyleOptionToolButton(const QStyleOptionToolButton &other)
+
+    Constructs a copy of the \a other style option.
+*/
+
+/*!
+    \enum QStyleOptionToolButton::StyleOptionType
+
+    This enum is used to hold information about the type of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Type The type of style option provided (\l{SO_ToolButton} for this class).
+
+    The type is used internally by QStyleOption, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleOption subclass and your own styles.
+
+    \sa StyleOptionVersion
+*/
+
+/*!
+    \enum QStyleOptionToolButton::StyleOptionVersion
+
+    This enum is used to hold information about the version of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Version 1
+
+    The version is used by QStyleOption subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+/*!
+    \variable QStyleOptionToolButton::features
+    \brief an OR combination of the tool button's features
+
+    The default value is \l None.
+
+    \sa ToolButtonFeature
+*/
+
+/*!
+    \variable QStyleOptionToolButton::icon
+    \brief the icon for the tool button
+
+    The default value is an empty icon, i.e. an icon with neither a
+    pixmap nor a filename.
+
+    \sa iconSize
+*/
+
+/*!
+    \variable QStyleOptionToolButton::iconSize
+    \brief the size of the icon for the tool button
+
+    The default value is QSize(-1, -1), i.e. an invalid size.
+*/
+
+/*!
+    \variable QStyleOptionToolButton::text
+    \brief the text of the tool button
+
+    This value is only used if toolButtonStyle is
+    Qt::ToolButtonTextUnderIcon, Qt::ToolButtonTextBesideIcon, or
+    Qt::ToolButtonTextOnly. The default value is an empty string.
+*/
+
+/*!
+    \variable QStyleOptionToolButton::arrowType
+    \brief the direction of the arrow for the tool button
+
+    This value is only used if \l features includes \l Arrow. The
+    default value is Qt::DownArrow.
+*/
+
+/*!
+    \variable QStyleOptionToolButton::toolButtonStyle
+    \brief a Qt::ToolButtonStyle value describing the appearance of
+    the tool button
+
+    The default value is Qt::ToolButtonIconOnly.
+
+    \sa QToolButton::toolButtonStyle()
+*/
+
+/*!
+    \variable QStyleOptionToolButton::pos
+    \brief the position of the tool button
+
+    The default value is a null point, i.e. (0, 0)
+*/
+
+/*!
+    \variable QStyleOptionToolButton::font
+    \brief the font that is used for the text
+
+    This value is only used if toolButtonStyle is
+    Qt::ToolButtonTextUnderIcon, Qt::ToolButtonTextBesideIcon, or
+    Qt::ToolButtonTextOnly. By default, the application's default font
+    is used.
+*/
+
+/*!
+    \class QStyleOptionComboBox
+    \brief The QStyleOptionComboBox class is used to describe the
+    parameter for drawing a combobox.
+
+    QStyleOptionButton contains all the information that QStyle
+    functions need to draw QComboBox.
+
+    For performance reasons, the access to the member variables is
+    direct (i.e., using the \c . or \c -> operator). This low-level feel
+    makes the structures straightforward to use and emphasizes that
+    these are simply parameters used by the style functions.
+
+    For an example demonstrating how style options can be used, see
+    the \l {widgets/styles}{Styles} example.
+
+    \sa QStyleOption, QStyleOptionComplex, QComboBox
+*/
+
+/*!
+    Creates a QStyleOptionComboBox, initializing the members variables
+    to their default values.
+*/
+
+QStyleOptionComboBox::QStyleOptionComboBox()
+    : QStyleOptionComplex(Version, SO_ComboBox), editable(false), frame(true)
+{
+}
+
+/*!
+    \internal
+*/
+QStyleOptionComboBox::QStyleOptionComboBox(int version)
+    : QStyleOptionComplex(version, SO_ComboBox), editable(false), frame(true)
+{
+}
+
+/*!
+    \fn QStyleOptionComboBox::QStyleOptionComboBox(const QStyleOptionComboBox &other)
+
+    Constructs a copy of the \a other style option.
+*/
+
+/*!
+    \enum QStyleOptionComboBox::StyleOptionType
+
+    This enum is used to hold information about the type of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Type The type of style option provided (\l{SO_ComboBox} for this class).
+
+    The type is used internally by QStyleOption, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleOption subclass and your own styles.
+
+    \sa StyleOptionVersion
+*/
+
+/*!
+    \enum QStyleOptionComboBox::StyleOptionVersion
+
+    This enum is used to hold information about the version of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Version 1
+
+    The version is used by QStyleOption subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+/*!
+    \variable QStyleOptionComboBox::editable
+    \brief whether or not the combobox is editable or not
+
+    the default
+    value is false
+
+    \sa QComboBox::isEditable()
+*/
+
+
+/*!
+    \variable QStyleOptionComboBox::frame
+    \brief whether the combo box has a frame
+
+    The default value is true.
+*/
+
+/*!
+    \variable QStyleOptionComboBox::currentText
+    \brief the text for the current item of the combo box
+
+    The default value is an empty string.
+*/
+
+/*!
+    \variable QStyleOptionComboBox::currentIcon
+    \brief the icon for the current item of the combo box
+
+    The default value is an empty icon, i.e. an icon with neither a
+    pixmap nor a filename.
+*/
+
+/*!
+    \variable QStyleOptionComboBox::iconSize
+    \brief the icon size for the current item of the combo box
+
+    The default value is QSize(-1, -1), i.e. an invalid size.
+*/
+
+/*!
+    \variable QStyleOptionComboBox::popupRect
+    \brief the popup rectangle for the combobox
+
+    The default value is a null rectangle, i.e. a rectangle with both
+    the width and the height set to 0.
+
+    This variable is currently unused. You can safely ignore it.
+
+    \sa QStyle::SC_ComboBoxListBoxPopup
+*/
+
+/*!
+    \class QStyleOptionToolBox
+    \brief The QStyleOptionToolBox class is used to describe the
+    parameters needed for drawing a tool box.
+
+    QStyleOptionToolBox contains all the information that QStyle
+    functions need to draw QToolBox.
+
+    For performance reasons, the access to the member variables is
+    direct (i.e., using the \c . or \c -> operator). This low-level feel
+    makes the structures straightforward to use and emphasizes that
+    these are simply parameters used by the style functions.
+
+    For an example demonstrating how style options can be used, see
+    the \l {widgets/styles}{Styles} example.
+
+    \sa QStyleOption, QToolBox
+*/
+
+/*!
+    Creates a QStyleOptionToolBox, initializing the members variables
+    to their default values.
+*/
+
+QStyleOptionToolBox::QStyleOptionToolBox()
+    : QStyleOption(Version, SO_ToolBox)
+{
+}
+
+/*!
+    \internal
+*/
+QStyleOptionToolBox::QStyleOptionToolBox(int version)
+    : QStyleOption(version, SO_ToolBox)
+{
+}
+
+/*!
+    \fn QStyleOptionToolBox::QStyleOptionToolBox(const QStyleOptionToolBox &other)
+
+    Constructs a copy of the \a other style option.
+*/
+
+/*!
+    \enum QStyleOptionToolBox::StyleOptionType
+
+    This enum is used to hold information about the type of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Type The type of style option provided (\l{SO_ToolBox} for this class).
+
+    The type is used internally by QStyleOption, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleOption subclass and your own styles.
+
+    \sa StyleOptionVersion
+*/
+
+/*!
+    \enum QStyleOptionToolBox::StyleOptionVersion
+
+    This enum is used to hold information about the version of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Version 1
+
+    The version is used by QStyleOption subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+/*!
+    \variable QStyleOptionToolBox::icon
+    \brief the icon for the tool box tab
+
+   The default value is an empty icon, i.e. an icon with neither a
+   pixmap nor a filename.
+*/
+
+/*!
+    \variable QStyleOptionToolBox::text
+    \brief the text for the tool box tab
+
+    The default value is an empty string.
+*/
+
+/*!
+    \class QStyleOptionToolBoxV2
+    \brief The QStyleOptionToolBoxV2 class is used to describe the parameters necessary for drawing a frame in Qt 4.3 or above.
+
+    \since 4.3
+    QStyleOptionToolBoxV2 inherits QStyleOptionToolBox which is used for
+    drawing the tabs in a QToolBox.
+
+    An instance of the QStyleOptionToolBoxV2 class has
+    \l{QStyleOption::type} {type} SO_ToolBox and
+    \l{QStyleOption::version} {version} 2.  The type is used
+    internally by QStyleOption, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleOption subclass and your own styles. The
+    version is used by QStyleOption subclasses to implement extensions
+    without breaking compatibility. If you use qstyleoption_cast(),
+    you normally do not need to check it.
+
+    If you create your own QStyle subclass, you should handle both
+    QStyleOptionToolBox and QStyleOptionToolBoxV2.
+
+    \sa QStyleOptionToolBox, QStyleOption
+*/
+
+/*!
+    Contsructs a QStyleOptionToolBoxV2 object.
+*/
+QStyleOptionToolBoxV2::QStyleOptionToolBoxV2()
+    : QStyleOptionToolBox(Version), position(Beginning), selectedPosition(NotAdjacent)
+{
+}
+
+/*!
+    \fn QStyleOptionToolBoxV2::QStyleOptionToolBoxV2(const QStyleOptionToolBoxV2 &other)
+
+    Constructs a QStyleOptionToolBoxV2 copy of the \a other style option.
+*/
+
+/*!
+    \internal
+*/
+QStyleOptionToolBoxV2::QStyleOptionToolBoxV2(int version)
+    : QStyleOptionToolBox(version), position(Beginning), selectedPosition(NotAdjacent)
+{
+}
+
+/*!
+    Constructs a QStyleOptionToolBoxV2 copy of the \a other style option
+    which can be either of the QStyleOptionToolBoxV2 or
+    QStyleOptionToolBox types.
+
+    If the \a other style option's version is 1, the new style
+    option's \l{QStyleOptionTab::position} {position} value is set to
+    \l QStyleOptionToolBoxV2::Beginning and \l selectedPosition is set
+    to \l QStyleOptionToolBoxV2::NotAdjacent. If its version is 2, the
+    \l{QStyleOptionTab::position} {position} selectedPosition values
+    are simply copied to the new style option.
+
+    \sa version
+*/
+QStyleOptionToolBoxV2::QStyleOptionToolBoxV2(const QStyleOptionToolBox &other)
+{
+    QStyleOptionToolBox::operator=(other);
+
+    const QStyleOptionToolBoxV2 *f2 = qstyleoption_cast<const QStyleOptionToolBoxV2 *>(&other);
+    position = f2 ? f2->position : Beginning;
+    selectedPosition = f2 ? f2->selectedPosition : NotAdjacent;
+    version = Version;
+}
+
+/*!
+    Assigns the \a other style option to this style option. The \a
+    other style option can be either of the QStyleOptionToolBoxV2 or
+    QStyleOptionToolBox types.
+
+    If the \a{other} style option's version is 1, this style option's
+    \l{QStyleOptionTab::position} {position} and \l selectedPosition
+    values are set to \l QStyleOptionToolBoxV2::Beginning and \l
+    QStyleOptionToolBoxV2::NotAdjacent respectively. If its
+    \l{QStyleOption::version} {version} is 2, these values are simply
+    copied to this style option.
+*/
+QStyleOptionToolBoxV2 &QStyleOptionToolBoxV2::operator=(const QStyleOptionToolBox &other)
+{
+    QStyleOptionToolBox::operator=(other);
+
+    const QStyleOptionToolBoxV2 *f2 = qstyleoption_cast<const QStyleOptionToolBoxV2 *>(&other);
+    position = f2 ? f2->position : Beginning;
+    selectedPosition = f2 ? f2->selectedPosition : NotAdjacent;
+    version = Version;
+    return *this;
+}
+
+
+/*!
+    \enum QStyleOptionToolBoxV2::SelectedPosition
+
+    This enum describes the position of the selected tab. Some styles
+    need to draw a tab differently depending on whether or not it is
+    adjacent to the selected tab.
+
+    \value NotAdjacent The tab is not adjacent to a selected tab (or is the selected tab).
+    \value NextIsSelected The next tab (typically the tab on the right) is selected.
+    \value PreviousIsSelected The previous tab (typically the tab on the left) is selected.
+
+    \sa selectedPosition
+*/
+
+/*!
+    \enum QStyleOptionToolBoxV2::StyleOptionVersion
+
+    This enum holds the version of this style option
+
+    \value Version 2
+*/
+
+/*!
+    \enum QStyleOptionToolBoxV2::TabPosition
+
+    This enum describes tab positions relative to other tabs.
+
+    \value Beginning The tab is the first (i.e., top-most) tab in
+           the toolbox.
+    \value Middle The tab is placed in the middle of the toolbox.
+    \value End The tab is placed at the bottom of the toolbox.
+    \value OnlyOneTab There is only one tab in the toolbox.
+*/
+
+/*!
+    \variable QStyleOptionToolBoxV2::selectedPosition
+    \brief the position of the selected tab in relation to this tab
+
+    The default value is NotAdjacent, i.e. the tab is not adjacent to
+    a selected tab nor is it the selected tab.
+*/
+
+#ifndef QT_NO_RUBBERBAND
+/*!
+    \class QStyleOptionRubberBand
+    \brief The QStyleOptionRubberBand class is used to describe the
+    parameters needed for drawing a rubber band.
+
+    QStyleOptionRubberBand contains all the information that
+    QStyle functions need to draw QRubberBand.
+
+    For performance reasons, the access to the member variables is
+    direct (i.e., using the \c . or \c -> operator). This low-level feel
+    makes the structures straightforward to use and emphasizes that
+    these are simply parameters used by the style functions.
+
+    For an example demonstrating how style options can be used, see
+    the \l {widgets/styles}{Styles} example.
+
+    \sa QStyleOption, QRubberBand
+*/
+
+/*!
+    Creates a QStyleOptionRubberBand, initializing the members
+    variables to their default values.
+*/
+
+QStyleOptionRubberBand::QStyleOptionRubberBand()
+    : QStyleOption(Version, SO_RubberBand), shape(QRubberBand::Line), opaque(false)
+{
+}
+
+/*!
+    \internal
+*/
+QStyleOptionRubberBand::QStyleOptionRubberBand(int version)
+    : QStyleOption(version, SO_RubberBand), shape(QRubberBand::Line), opaque(false)
+{
+}
+
+/*!
+    \fn QStyleOptionRubberBand::QStyleOptionRubberBand(const QStyleOptionRubberBand &other)
+
+    Constructs a copy of the \a other style option.
+*/
+
+/*!
+    \enum QStyleOptionRubberBand::StyleOptionType
+
+    This enum is used to hold information about the type of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Type The type of style option provided (\l{SO_RubberBand} for this class).
+
+    The type is used internally by QStyleOption, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleOption subclass and your own styles.
+
+    \sa StyleOptionVersion
+*/
+
+/*!
+    \enum QStyleOptionRubberBand::StyleOptionVersion
+
+    This enum is used to hold information about the version of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Version 1
+
+    The version is used by QStyleOption subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+/*!
+    \variable QStyleOptionRubberBand::shape
+    \brief the shape of the rubber band
+
+    The default shape is QRubberBand::Line.
+*/
+
+/*!
+    \variable QStyleOptionRubberBand::opaque
+    \brief whether the rubber band is required to be drawn in an opaque style
+
+    The default value is true.
+*/
+#endif // QT_NO_RUBBERBAND
+
+/*!
+    \class QStyleOptionTitleBar
+    \brief The QStyleOptionTitleBar class is used to describe the
+    parameters for drawing a title bar.
+
+    QStyleOptionTitleBar contains all the information that QStyle
+    functions need to draw the title bars of QWorkspace's MDI
+    children.
+
+    For performance reasons, the access to the member variables is
+    direct (i.e., using the \c . or \c -> operator). This low-level feel
+    makes the structures straightforward to use and emphasizes that
+    these are simply parameters used by the style functions.
+
+    For an example demonstrating how style options can be used, see
+    the \l {widgets/styles}{Styles} example.
+
+    \sa QStyleOption, QStyleOptionComplex, QWorkspace
+*/
+
+/*!
+    Constructs a QStyleOptionTitleBar, initializing the members
+    variables to their default values.
+*/
+
+QStyleOptionTitleBar::QStyleOptionTitleBar()
+    : QStyleOptionComplex(Version, SO_TitleBar), titleBarState(0), titleBarFlags(0)
+{
+}
+
+/*!
+    \fn QStyleOptionTitleBar::QStyleOptionTitleBar(const QStyleOptionTitleBar &other)
+
+    Constructs a copy of the \a other style option.
+*/
+
+/*!
+    \enum QStyleOptionTitleBar::StyleOptionType
+
+    This enum is used to hold information about the type of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Type The type of style option provided (\l{SO_TitleBar} for this class).
+
+    The type is used internally by QStyleOption, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleOption subclass and your own styles.
+
+    \sa StyleOptionVersion
+*/
+
+/*!
+    \enum QStyleOptionTitleBar::StyleOptionVersion
+
+    This enum is used to hold information about the version of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Version 1
+
+    The version is used by QStyleOption subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+/*!
+    \internal
+*/
+QStyleOptionTitleBar::QStyleOptionTitleBar(int version)
+    : QStyleOptionComplex(version, SO_TitleBar), titleBarState(0), titleBarFlags(0)
+{
+}
+
+
+/*!
+    \variable QStyleOptionTitleBar::text
+    \brief the text of the title bar
+
+    The default value is an empty string.
+*/
+
+/*!
+    \variable QStyleOptionTitleBar::icon
+    \brief the icon for the title bar
+
+    The default value is an empty icon, i.e. an icon with neither a
+    pixmap nor a filename.
+*/
+
+/*!
+    \variable QStyleOptionTitleBar::titleBarState
+    \brief the state of the title bar
+
+    This is basically the window state of the underlying widget. The
+    default value is 0.
+
+    \sa QWidget::windowState()
+*/
+
+/*!
+    \variable QStyleOptionTitleBar::titleBarFlags
+    \brief the widget flags for the title bar
+
+    The default value is Qt::Widget.
+
+    \sa Qt::WindowFlags
+*/
+
+/*!
+    \class QStyleOptionViewItem
+    \brief The QStyleOptionViewItem class is used to describe the
+    parameters used to draw an item in a view widget.
+
+    QStyleOptionViewItem contains all the information that QStyle
+    functions need to draw the items for Qt's model/view classes.
+
+    For performance reasons, the access to the member variables is
+    direct (i.e., using the \c . or \c -> operator). This low-level feel
+    makes the structures straightforward to use and emphasizes that
+    these are simply parameters used by the style functions.
+
+    For an example demonstrating how style options can be used, see
+    the \l {widgets/styles}{Styles} example.
+
+    \sa QStyleOption, {model-view-programming.html}{Model/View
+    Programming}
+*/
+
+/*!
+    \enum QStyleOptionViewItem::Position
+
+    This enum describes the position of the item's decoration.
+
+    \value Left On the left of the text.
+    \value Right On the right of the text.
+    \value Top Above the text.
+    \value Bottom Below the text.
+
+    \sa decorationPosition
+*/
+
+/*!
+    \variable QStyleOptionViewItem::showDecorationSelected
+    \brief whether the decoration should be highlighted on selected
+    items
+
+    If this option is true, the branch and any decorations on selected items
+    should be highlighted, indicating that the item is selected; otherwise, no
+    highlighting is required. The default value is false.
+
+    \sa QStyle::SH_ItemView_ShowDecorationSelected, QAbstractItemView
+*/
+
+/*!
+    \variable QStyleOptionViewItem::textElideMode
+    \brief where ellipsis should be added for text that is too long to fit
+    into an item
+
+    The default value is Qt::ElideMiddle, i.e. the ellipsis appears in
+    the middle of the text.
+
+    \sa Qt::TextElideMode, QStyle::SH_ItemView_EllipsisLocation
+*/
+
+/*!
+    Constructs a QStyleOptionViewItem, initializing the members
+    variables to their default values.
+*/
+
+QStyleOptionViewItem::QStyleOptionViewItem()
+    : QStyleOption(Version, SO_ViewItem),
+      displayAlignment(Qt::AlignLeft), decorationAlignment(Qt::AlignLeft),
+      textElideMode(Qt::ElideMiddle), decorationPosition(Left),
+      showDecorationSelected(false)
+{
+}
+
+/*!
+    \internal
+*/
+QStyleOptionViewItem::QStyleOptionViewItem(int version)
+    : QStyleOption(version, SO_ViewItem),
+      displayAlignment(Qt::AlignLeft), decorationAlignment(Qt::AlignLeft),
+      textElideMode(Qt::ElideMiddle), decorationPosition(Left),
+      showDecorationSelected(false)
+{
+}
+
+/*!
+    \fn QStyleOptionViewItem::QStyleOptionViewItem(const QStyleOptionViewItem &other)
+
+    Constructs a copy of the \a other style option.
+*/
+
+/*!
+    \enum QStyleOptionViewItem::StyleOptionType
+
+    This enum is used to hold information about the type of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Type The type of style option provided (\l{SO_ViewItem} for this class).
+
+    The type is used internally by QStyleOption, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleOption subclass and your own styles.
+
+    \sa StyleOptionVersion
+*/
+
+/*!
+    \enum QStyleOptionViewItem::StyleOptionVersion
+
+    This enum is used to hold information about the version of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Version 1
+
+    The version is used by QStyleOption subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+/*!
+    \variable QStyleOptionViewItem::displayAlignment
+    \brief the alignment of the display value for the item
+
+    The default value is Qt::AlignLeft.
+*/
+
+/*!
+    \variable QStyleOptionViewItem::decorationAlignment
+    \brief the alignment of the decoration for the item
+
+    The default value is Qt::AlignLeft.
+*/
+
+/*!
+    \variable QStyleOptionViewItem::decorationPosition
+    \brief the position of the decoration for the item
+
+    The default value is \l Left.
+
+    \sa Position
+*/
+
+/*!
+    \variable QStyleOptionViewItem::decorationSize
+    \brief the size of the decoration for the item
+
+    The default value is QSize(-1, -1), i.e. an invalid size.
+
+    \sa decorationAlignment, decorationPosition
+*/
+
+/*!
+    \variable QStyleOptionViewItem::font
+    \brief the font used for the item
+
+    By default, the application's default font is used.
+
+    \sa QFont
+*/
+
+/*!
+    \fn T qstyleoption_cast<T>(const QStyleOption *option)
+    \relates QStyleOption
+
+    Returns a T or 0 depending on the \l{QStyleOption::type}{type} and
+    \l{QStyleOption::version}{version} of the given \a option.
+
+    Example:
+
+    \snippet doc/src/snippets/qstyleoption/main.cpp 4
+
+    \sa QStyleOption::type, QStyleOption::version
+*/
+
+/*!
+    \fn T qstyleoption_cast<T>(QStyleOption *option)
+    \overload
+    \relates QStyleOption
+
+    Returns a T or 0 depending on the type of the given \a option.
+*/
+
+#ifndef QT_NO_TABWIDGET
+/*!
+    \class QStyleOptionTabWidgetFrame
+    \brief The QStyleOptionTabWidgetFrame class is used to describe the
+    parameters for drawing the frame around a tab widget.
+
+    QStyleOptionTabWidgetFrame contains all the information that
+    QStyle functions need to draw the frame around QTabWidget.
+
+    For performance reasons, the access to the member variables is
+    direct (i.e., using the \c . or \c -> operator). This low-level feel
+    makes the structures straightforward to use and emphasizes that
+    these are simply parameters used by the style functions.
+
+    For an example demonstrating how style options can be used, see
+    the \l {widgets/styles}{Styles} example.
+
+    \sa QStyleOption, QTabWidget
+*/
+
+/*!
+    Constructs a QStyleOptionTabWidgetFrame, initializing the members
+    variables to their default values.
+*/
+QStyleOptionTabWidgetFrame::QStyleOptionTabWidgetFrame()
+    : QStyleOption(Version, SO_TabWidgetFrame), lineWidth(0), midLineWidth(0),
+      shape(QTabBar::RoundedNorth)
+{
+}
+
+/*!
+    \fn QStyleOptionTabWidgetFrame::QStyleOptionTabWidgetFrame(const QStyleOptionTabWidgetFrame &other)
+
+    Constructs a copy of \a other.
+*/
+
+/*! \internal */
+QStyleOptionTabWidgetFrame::QStyleOptionTabWidgetFrame(int version)
+    : QStyleOption(version, SO_TabWidgetFrame), lineWidth(0), midLineWidth(0),
+      shape(QTabBar::RoundedNorth)
+{
+}
+
+/*!
+    \enum QStyleOptionTabWidgetFrame::StyleOptionType
+
+    This enum is used to hold information about the type of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Type The type of style option provided (\l{SO_TabWidgetFrame} for this class).
+
+    The type is used internally by QStyleOption, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleOption subclass and your own styles.
+
+    \sa StyleOptionVersion
+*/
+
+/*!
+    \enum QStyleOptionTabWidgetFrame::StyleOptionVersion
+
+    This enum is used to hold information about the version of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Version 1
+
+    The version is used by QStyleOption subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+/*!
+    \variable QStyleOptionTabWidgetFrame::lineWidth
+    \brief the line width for drawing the panel
+
+    The default value is 0.
+*/
+
+/*!
+    \variable QStyleOptionTabWidgetFrame::midLineWidth
+    \brief the mid-line width for drawing the panel
+
+    The mid line width is usually used in drawing sunken or raised
+    frames. The default value is 0.
+*/
+
+/*!
+    \variable QStyleOptionTabWidgetFrame::shape
+    \brief the tab shape used to draw the tabs
+
+    The default value is QTabBar::RoundedNorth.
+*/
+
+/*!
+    \variable QStyleOptionTabWidgetFrame::tabBarSize
+    \brief the size of the tab bar
+
+    The default value is QSize(-1, -1), i.e. an invalid size.
+*/
+
+/*!
+    \variable QStyleOptionTabWidgetFrame::rightCornerWidgetSize
+    \brief the size of the right-corner widget
+
+    The default value is QSize(-1, -1), i.e. an invalid size.
+*/
+
+/*! \variable QStyleOptionTabWidgetFrame::leftCornerWidgetSize
+    \brief the size of the left-corner widget
+
+    The default value is QSize(-1, -1), i.e. an invalid size.
+*/
+#endif // QT_NO_TABWIDGET
+
+#ifndef QT_NO_TABBAR
+
+/*!
+    \class QStyleOptionTabBarBase
+    \brief The QStyleOptionTabBarBase class is used to describe
+    the base of a tab bar, i.e. the part that the tab bar usually
+    overlaps with.
+
+    QStyleOptionTabBarBase  contains all the information that QStyle
+    functions need to draw the tab bar base. Note that this is only
+    drawn for a standalone QTabBar (one that isn't part of a
+    QTabWidget).
+
+    For performance reasons, the access to the member variables is
+    direct (i.e., using the \c . or \c -> operator). This low-level feel
+    makes the structures straightforward to use and emphasizes that
+    these are simply parameters used by the style functions.
+
+    For an example demonstrating how style options can be used, see
+    the \l {widgets/styles}{Styles} example.
+
+    \sa QStyleOption, QTabBar::drawBase()
+*/
+
+/*!
+    Construct a QStyleOptionTabBarBase, initializing the members
+    vaiables to their default values.
+*/
+QStyleOptionTabBarBase::QStyleOptionTabBarBase()
+    : QStyleOption(Version, SO_TabBarBase), shape(QTabBar::RoundedNorth)
+{
+}
+
+/*! \internal */
+QStyleOptionTabBarBase::QStyleOptionTabBarBase(int version)
+    : QStyleOption(version, SO_TabBarBase), shape(QTabBar::RoundedNorth)
+{
+}
+
+/*!
+    \fn QStyleOptionTabBarBase::QStyleOptionTabBarBase(const QStyleOptionTabBarBase &other)
+
+    Constructs a copy of \a other.
+*/
+
+/*!
+    \enum QStyleOptionTabBarBase::StyleOptionType
+
+    This enum is used to hold information about the type of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Type The type of style option provided (\l{SO_TabBarBase} for this class).
+
+    The type is used internally by QStyleOption, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleOption subclass and your own styles.
+
+    \sa StyleOptionVersion
+*/
+
+/*!
+    \enum QStyleOptionTabBarBase::StyleOptionVersion
+
+    This enum is used to hold information about the version of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Version 1
+
+    The version is used by QStyleOption subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+/*!
+    \variable QStyleOptionTabBarBase::shape
+    \brief the shape of the tab bar
+
+    The default value is QTabBar::RoundedNorth.
+*/
+
+/*!
+    \variable QStyleOptionTabBarBase::tabBarRect
+    \brief the rectangle containing all the tabs
+
+    The default value is a null rectangle, i.e. a rectangle with both
+    the width and the height set to 0.
+*/
+
+/*!
+    \variable QStyleOptionTabBarBase::selectedTabRect
+    \brief the rectangle containing the selected tab
+
+    This rectangle is contained within the tabBarRect. The default
+    value is a null rectangle, i.e. a rectangle with both the width
+    and the height set to 0.
+*/
+
+
+/*!
+    \class QStyleOptionTabBarBaseV2
+    \brief The QStyleOptionTabBarBaseV2 class is used to describe
+    the base of a tab bar, i.e. the part that the tab bar usually
+    overlaps with.
+    \since 4.5
+
+    QStyleOptionTabBarBase  contains all the information that QStyle
+    functions need to draw the tab bar base.
+
+    For performance reasons, the access to the member variables is
+    direct (i.e., using the \c . or \c -> operator). This low-level feel
+    makes the structures straightforward to use and emphasizes that
+    these are simply parameters used by the style functions.
+
+    For an example demonstrating how style options can be used, see
+    the \l {widgets/styles}{Styles} example.
+
+    \sa QStyleOption, QTabBar::drawBase()
+*/
+
+/*!
+    \enum QStyleOptionTabBarBaseV2::StyleOptionVersion
+
+    This enum is used to hold information about the version of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Version 2
+
+    The version is used by QStyleOption subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+/*!
+    \variable QStyleOptionTabBarBaseV2::documentMode
+    \brief whether the tabbar is in document mode.
+
+    The default value is false;
+*/
+
+/*!
+    Construct a QStyleOptionTabBarBaseV2, initializing the members
+    vaiables to their default values.
+*/
+QStyleOptionTabBarBaseV2::QStyleOptionTabBarBaseV2()
+    : QStyleOptionTabBarBase(Version)
+    , documentMode(false)
+{
+}
+
+/*!
+    \fn QStyleOptionTabBarBaseV2::QStyleOptionTabBarBaseV2(const QStyleOptionTabBarBaseV2 &other)
+
+    Constructs a copy of \a other.
+*/
+
+/*!
+    Constructs a copy of \a other.
+*/
+QStyleOptionTabBarBaseV2::QStyleOptionTabBarBaseV2(const QStyleOptionTabBarBase &other)
+    : QStyleOptionTabBarBase(Version)
+{
+    (void)QStyleOptionTabBarBaseV2::operator=(other);
+}
+
+/*!
+    Constructs a QStyleOptionTabBarBaseV2 copy of the \a other style option
+    which can be either of the QStyleOptionTabBarBaseV2, or QStyleOptionTabBarBase types.
+
+    If the other style option's version is not 1, the new style option's
+    \c documentMode is set to false.  If its version is 2, its \c documentMode value
+    is simply copied to the new style option.
+*/
+QStyleOptionTabBarBaseV2 &QStyleOptionTabBarBaseV2::operator = (const QStyleOptionTabBarBase &other)
+{
+    QStyleOptionTabBarBase::operator=(other);
+    const QStyleOptionTabBarBaseV2 *v2 = qstyleoption_cast<const QStyleOptionTabBarBaseV2*>(&other);
+    documentMode = v2 ? v2->documentMode : false;
+    return *this;
+}
+
+/*! \internal */
+QStyleOptionTabBarBaseV2::QStyleOptionTabBarBaseV2(int version)
+    : QStyleOptionTabBarBase(version)
+{
+}
+
+#endif // QT_NO_TABBAR
+
+#ifndef QT_NO_SIZEGRIP
+/*!
+    \class QStyleOptionSizeGrip
+    \brief The QStyleOptionSizeGrip class is used to describe the
+    parameter for drawing a size grip.
+    \since 4.2
+
+    QStyleOptionButton contains all the information that QStyle
+    functions need to draw QSizeGrip.
+
+    For performance reasons, the access to the member variables is
+    direct (i.e., using the \c . or \c -> operator). This low-level feel
+    makes the structures straightforward to use and emphasizes that
+    these are simply parameters used by the style functions.
+
+    For an example demonstrating how style options can be used, see
+    the \l {widgets/styles}{Styles} example.
+
+    \sa QStyleOption, QStyleOptionComplex, QSizeGrip
+*/
+
+/*!
+    Constructs a QStyleOptionSizeGrip.
+*/
+QStyleOptionSizeGrip::QStyleOptionSizeGrip()
+    : QStyleOptionComplex(Version, Type), corner(Qt::BottomRightCorner)
+{
+}
+
+/*!
+    \fn QStyleOptionSizeGrip::QStyleOptionSizeGrip(const QStyleOptionSizeGrip &other)
+
+    Constructs a copy of the \a other style option.
+*/
+
+/*!
+    \internal
+*/
+QStyleOptionSizeGrip::QStyleOptionSizeGrip(int version)
+    : QStyleOptionComplex(version, Type), corner(Qt::BottomRightCorner)
+{
+}
+
+/*!
+    \variable QStyleOptionSizeGrip::corner
+
+    The corner in which the size grip is located.
+*/
+
+/*!
+    \enum QStyleOptionSizeGrip::StyleOptionType
+
+    This enum is used to hold information about the type of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Type The type of style option provided (\l{SO_TabBarBase} for this class).
+
+    The type is used internally by QStyleOption, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleOption subclass and your own styles.
+
+    \sa StyleOptionVersion
+*/
+
+/*!
+    \enum QStyleOptionSizeGrip::StyleOptionVersion
+
+    This enum is used to hold information about the version of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Version 1
+
+    The version is used by QStyleOption subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+#endif // QT_NO_SIZEGRIP
+
+/*!
+    \class QStyleOptionGraphicsItem
+    \brief The QStyleOptionGraphicsItem class is used to describe
+    the parameters needed to draw a QGraphicsItem.
+    \since 4.2
+    \ingroup multimedia
+
+    For performance reasons, the access to the member variables is
+    direct (i.e., using the \c . or \c -> operator). This low-level feel
+    makes the structures straightforward to use and emphasizes that
+    these are simply parameters.
+
+    For an example demonstrating how style options can be used, see
+    the \l {widgets/styles}{Styles} example.
+
+    \sa QStyleOption, QGraphicsItem::paint()
+*/
+
+/*!
+    \enum QStyleOptionGraphicsItem::StyleOptionType
+
+    This enum is used to hold information about the type of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Type The type of style option provided (\l SO_GraphicsItem for this class).
+
+    The type is used internally by QStyleOption, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleOption subclass and your own styles.
+
+    \sa StyleOptionVersion
+*/
+
+/*!
+    \enum QStyleOptionGraphicsItem::StyleOptionVersion
+
+    This enum is used to hold information about the version of the style option, and
+    is defined for each QStyleOption subclass.
+
+    \value Version 1
+
+    The version is used by QStyleOption subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+/*!
+    Constructs a QStyleOptionGraphicsItem. The levelOfDetail parameter is
+    initialized to 1.
+*/
+QStyleOptionGraphicsItem::QStyleOptionGraphicsItem()
+    : QStyleOption(Version, Type), levelOfDetail(1)
+{
+}
+
+/*!
+    \internal
+*/
+QStyleOptionGraphicsItem::QStyleOptionGraphicsItem(int version)
+    : QStyleOption(version, Type), levelOfDetail(1)
+{
+}
+
+/*!
+    \fn QStyleOptionGraphicsItem::QStyleOptionGraphicsItem(const QStyleOptionGraphicsItem &other)
+
+    Constructs a copy of \a other.
+*/
+
+/*!
+    \variable QStyleOptionGraphicsItem::exposedRect
+    \brief the exposed rectangle, in item coordinates
+
+    Make use of this rectangle to speed up item drawing when only parts of the
+    item are exposed. If the whole item is exposed, this rectangle will be the
+    same as QGraphicsItem::boundingRect().
+*/
+
+/*!
+     \variable QStyleOptionGraphicsItem::matrix
+     \brief the complete transformation matrix for the item
+
+     This matrix is the sum of the item's scene matrix and the matrix of the
+     painter used for drawing the item. It is provided for convenience,
+     allowing anvanced level-of-detail metrics that can be used to speed up
+     item drawing.
+
+     To find the dimentions of an item in screen coordinates (i.e., pixels),
+     you can use the mapping functions of QMatrix, such as QMatrix::map().
+
+     \sa QStyleOptionGraphicsItem::levelOfDetail
+*/
+
+/*!
+    \variable QStyleOptionGraphicsItem::levelOfDetail
+    \brief a simple metric for determining an item's level of detail
+
+    This simple metric provides an easy way to determine the level of detail
+    for an item. Its value represents the maximum value of the height and
+    width of a unity rectangle, mapped using the complete transformation
+    matrix of the painter used to draw the item. By default, if no
+    transformations are applied, its value is 1. If zoomed out 1:2, the level
+    of detail will be 0.5, and if zoomed in 2:1, its value is 2.
+
+    For more advanced level-of-detail metrics, use
+    QStyleOptionGraphicsItem::matrix directly.
+
+    \sa QStyleOptionGraphicsItem::matrix
+*/
+
+/*!
+    \class QStyleHintReturn
+    \brief The QStyleHintReturn class provides style hints that return more
+    than basic data types.
+
+    \ingroup appearance
+
+    QStyleHintReturn and its subclasses are used to pass information
+    from a style back to the querying widget. This is most useful
+    when the return value from QStyle::styleHint() does not provide enough
+    detail; for example, when a mask is to be returned.
+
+    \omit
+    ### --Sam
+    \endomit
+*/
+
+/*!
+    \enum QStyleHintReturn::HintReturnType
+
+    \value SH_Default QStyleHintReturn
+    \value SH_Mask \l QStyle::SH_RubberBand_Mask QStyle::SH_FocusFrame_Mask
+    \value SH_Variant \l QStyle::SH_TextControl_FocusIndicatorTextCharFormat
+*/
+
+/*!
+    \enum QStyleHintReturn::StyleOptionType
+
+    This enum is used to hold information about the type of the style option, and
+    is defined for each QStyleHintReturn subclass.
+
+    \value Type The type of style option provided (\l SH_Default for
+           this class).
+
+    The type is used internally by QStyleHintReturn, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleHintReturn subclass and your own styles.
+
+    \sa StyleOptionVersion
+*/
+
+/*!
+    \enum QStyleHintReturn::StyleOptionVersion
+
+    This enum is used to hold information about the version of the style option, and
+    is defined for each QStyleHintReturn subclass.
+
+    \value Version 1
+
+    The version is used by QStyleHintReturn subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+/*!
+    \variable QStyleHintReturn::type
+    \brief the type of the style hint container
+
+    \sa HintReturnType
+*/
+
+/*!
+    \variable QStyleHintReturn::version
+    \brief the version of the style hint return container
+
+    This value can be used by subclasses to implement extensions
+    without breaking compatibility. If you use qstyleoption_cast<T>(), you
+    normally do not need to check it.
+*/
+
+/*!
+    Constructs a QStyleHintReturn with version \a version and type \a
+    type.
+
+    The version has no special meaning for QStyleHintReturn; it can be
+    used by subclasses to distinguish between different version of
+    the same hint type.
+
+    \sa QStyleOption::version, QStyleOption::type
+*/
+
+QStyleHintReturn::QStyleHintReturn(int version, int type)
+    : version(version), type(type)
+{
+}
+
+/*!
+    \internal
+*/
+
+QStyleHintReturn::~QStyleHintReturn()
+{
+
+}
+
+/*!
+    \class QStyleHintReturnMask
+    \brief The QStyleHintReturnMask class provides style hints that return a QRegion.
+
+    \ingroup appearance
+
+    \omit
+    ### --Sam
+    \endomit
+*/
+
+/*!
+    \variable QStyleHintReturnMask::region
+    \brief the region for style hints that return a QRegion
+*/
+
+/*!
+    Constructs a QStyleHintReturnMask. The member variables are
+    initialized to default values.
+*/
+QStyleHintReturnMask::QStyleHintReturnMask() : QStyleHintReturn(Version, Type)
+{
+}
+
+/*!
+    \enum QStyleHintReturnMask::StyleOptionType
+
+    This enum is used to hold information about the type of the style option, and
+    is defined for each QStyleHintReturn subclass.
+
+    \value Type The type of style option provided (\l{SH_Mask} for
+           this class).
+
+    The type is used internally by QStyleHintReturn, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleHintReturn subclass and your own styles.
+
+    \sa StyleOptionVersion
+*/
+
+/*!
+    \enum QStyleHintReturnMask::StyleOptionVersion
+
+    This enum is used to hold information about the version of the style option, and
+    is defined for each QStyleHintReturn subclass.
+
+    \value Version 1
+
+    The version is used by QStyleHintReturn subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+/*!
+    \class QStyleHintReturnVariant
+    \brief The QStyleHintReturnVariant class provides style hints that return a QVariant.
+    \since 4.3
+    \ingroup appearance
+*/
+
+/*!
+    \variable QStyleHintReturnVariant::variant
+    \brief the variant for style hints that return a QVariant
+*/
+
+/*!
+    Constructs a QStyleHintReturnVariant. The member variables are
+    initialized to default values.
+*/
+QStyleHintReturnVariant::QStyleHintReturnVariant() : QStyleHintReturn(Version, Type)
+{
+}
+
+/*!
+    \enum QStyleHintReturnVariant::StyleOptionType
+
+    This enum is used to hold information about the type of the style option, and
+    is defined for each QStyleHintReturn subclass.
+
+    \value Type The type of style option provided (\l{SH_Variant} for
+           this class).
+
+    The type is used internally by QStyleHintReturn, its subclasses, and
+    qstyleoption_cast() to determine the type of style option. In
+    general you do not need to worry about this unless you want to
+    create your own QStyleHintReturn subclass and your own styles.
+
+    \sa StyleOptionVersion
+*/
+
+/*!
+    \enum QStyleHintReturnVariant::StyleOptionVersion
+
+    This enum is used to hold information about the version of the style option, and
+    is defined for each QStyleHintReturn subclass.
+
+    \value Version 1
+
+    The version is used by QStyleHintReturn subclasses to implement
+    extensions without breaking compatibility. If you use
+    qstyleoption_cast(), you normally do not need to check it.
+
+    \sa StyleOptionType
+*/
+
+/*!
+    \fn T qstyleoption_cast<T>(const QStyleHintReturn *hint)
+    \relates QStyleHintReturn
+
+    Returns a T or 0 depending on the \l{QStyleHintReturn::type}{type}
+    and \l{QStyleHintReturn::version}{version} of \a hint.
+
+    Example:
+
+    \snippet doc/src/snippets/code/src_gui_styles_qstyleoption.cpp 0
+
+    \sa QStyleHintReturn::type, QStyleHintReturn::version
+*/
+
+/*!
+    \fn T qstyleoption_cast<T>(QStyleHintReturn *hint)
+    \overload
+    \relates QStyleHintReturn
+
+    Returns a T or 0 depending on the type of \a hint.
+*/
+
+#if !defined(QT_NO_DEBUG) && !defined(QT_NO_DEBUG_STREAM)
+QDebug operator<<(QDebug debug, const QStyleOption::OptionType &optionType)
+{
+    switch (optionType) {
+    case QStyleOption::SO_Default:
+        debug << "SO_Default"; break;
+    case QStyleOption::SO_FocusRect:
+        debug << "SO_FocusRect"; break;
+    case QStyleOption::SO_Button:
+        debug << "SO_Button"; break;
+    case QStyleOption::SO_Tab:
+        debug << "SO_Tab"; break;
+    case QStyleOption::SO_MenuItem:
+        debug << "SO_MenuItem"; break;
+    case QStyleOption::SO_Frame:
+        debug << "SO_Frame"; break;
+    case QStyleOption::SO_ProgressBar:
+        debug << "SO_ProgressBar"; break;
+    case QStyleOption::SO_ToolBox:
+        debug << "SO_ToolBox"; break;
+    case QStyleOption::SO_Header:
+        debug << "SO_Header"; break;
+    case QStyleOption::SO_Q3DockWindow:
+        debug << "SO_Q3DockWindow"; break;
+    case QStyleOption::SO_DockWidget:
+        debug << "SO_DockWidget"; break;
+    case QStyleOption::SO_Q3ListViewItem:
+        debug << "SO_Q3ListViewItem"; break;
+    case QStyleOption::SO_ViewItem:
+        debug << "SO_ViewItem"; break;
+    case QStyleOption::SO_TabWidgetFrame:
+        debug << "SO_TabWidgetFrame"; break;
+    case QStyleOption::SO_TabBarBase:
+        debug << "SO_TabBarBase"; break;
+    case QStyleOption::SO_RubberBand:
+        debug << "SO_RubberBand"; break;
+    case QStyleOption::SO_Complex:
+        debug << "SO_Complex"; break;
+    case QStyleOption::SO_Slider:
+        debug << "SO_Slider"; break;
+    case QStyleOption::SO_SpinBox:
+        debug << "SO_SpinBox"; break;
+    case QStyleOption::SO_ToolButton:
+        debug << "SO_ToolButton"; break;
+    case QStyleOption::SO_ComboBox:
+        debug << "SO_ComboBox"; break;
+    case QStyleOption::SO_Q3ListView:
+        debug << "SO_Q3ListView"; break;
+    case QStyleOption::SO_TitleBar:
+        debug << "SO_TitleBar"; break;
+    case QStyleOption::SO_CustomBase:
+        debug << "SO_CustomBase"; break;
+    case QStyleOption::SO_GroupBox:
+        debug << "SO_GroupBox"; break;
+    case QStyleOption::SO_ToolBar:
+        debug << "SO_ToolBar"; break;
+    case QStyleOption::SO_ComplexCustomBase:
+        debug << "SO_ComplexCustomBase"; break;
+    case QStyleOption::SO_SizeGrip:
+        debug << "SO_SizeGrip"; break;
+    case QStyleOption::SO_GraphicsItem:
+        debug << "SO_GraphicsItem"; break;
+    }
+    return debug;
+}
+
+QDebug operator<<(QDebug debug, const QStyleOption &option)
+{
+    debug << "QStyleOption(";
+    debug << QStyleOption::OptionType(option.type);
+    debug << "," << (option.direction == Qt::RightToLeft ? "RightToLeft" : "LeftToRight");
+    debug << "," << option.state;
+    debug << "," << option.rect;
+    debug << ")";
+    return debug;
+}
+#endif
+
+QT_END_NAMESPACE