qstyleoption.cpp

奇趣公司比较新的qt/emd版本

*/

/*!
    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;
}


#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 don't 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 don't 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 type SO_ProgressBar and \l
    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 don't 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:

    \quotefromfile snippets/qstyleoption/main.cpp
    \skipto MyStyle::MyStyle()
    \skipto *progressBarOption
    \printuntil }

    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 don't 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