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//! [0]

QAccessibleSlider::QAccessibleSlider(QWidget *w)

: QAccessibleAbstractSlider(w)

{

    Q_ASSERT(slider());

    addControllingSignal(QLatin1String("valueChanged(int)"));

}

//! [0]

QSlider *QAccessibleSlider::slider() const

{

    return qobject_cast<QSlider*>(object());

}

//! [1]

QRect QAccessibleSlider::rect(int child) const

{

//! [1]

    QRect rect;

    if (!slider()->isVisible())

        return rect;

    const QStyleOptionSlider option = qt_qsliderStyleOption(slider());

    QRect srect = slider()->style()->subControlRect(QStyle::CC_Slider, &option,

                                                    QStyle::SC_SliderHandle, slider());

//! [2]

    switch (child) {

    case PageLeft:

        if (slider()->orientation() == Qt::Vertical)

            rect = QRect(0, 0, slider()->width(), srect.y());

        else

            rect = QRect(0, 0, srect.x(), slider()->height());

        break;

    case Position:

        rect = srect;

        break;

    case PageRight:

        if (slider()->orientation() == Qt::Vertical)

            rect = QRect(0, srect.y() + srect.height(), slider()->width(), slider()->height()- srect.y() - srect.height());

        else

            rect = QRect(srect.x() + srect.width(), 0, slider()->width() - srect.x() - srect.width(), slider()->height());

        break;

    default:

        return QAccessibleAbstractSlider::rect(child);

    }

//! [2] //! [3]

    QPoint tp = slider()->mapToGlobal(QPoint(0,0));

    return QRect(tp.x() + rect.x(), tp.y() + rect.y(), rect.width(), rect.height());

}

//! [3]

int QAccessibleSlider::childCount() const

{

    if (!slider()->isVisible())

        return 0;

    return PageRight;

}

//! [4]

QString QAccessibleSlider::text(Text t, int child) const

{

    if (!slider()->isVisible())

        return QString();

    switch (t) {

    case Value:

        if (!child || child == 2)

            return QString::number(slider()->value());

        return QString();

    case Name:

        switch (child) {

        case PageLeft:

            return slider()->orientation() == Qt::Horizontal ?

                QSlider::tr("Page left") : QSlider::tr("Page up");

        case Position:

            return QSlider::tr("Position");

        case PageRight:

            return slider()->orientation() == Qt::Horizontal ?

                QSlider::tr("Page right") : QSlider::tr("Page down");

        }

        break;

    default:

        break;

    }

    return QAccessibleAbstractSlider::text(t, child);

}

//! [4]

//! [5]

QAccessible::Role QAccessibleSlider::role(int child) const

{

    switch (child) {

    case PageLeft:

    case PageRight:

        return PushButton;

    case Position:

        return Indicator;

    default:

        return Slider;

    }

}

//! [5]

//! [6]

QAccessible::State QAccessibleSlider::state(int child) const

{

    const State parentState = QAccessibleAbstractSlider::state(0);

//! [6]

    if (child == 0)

        return parentState;

    // Inherit the Invisible state from parent.

    State state = parentState & QAccessible::Invisible;

    // Disable left/right if we are at the minimum/maximum.

    const QSlider * const slider = QAccessibleSlider::slider();

//! [7]

    switch (child) {

    case PageLeft:

        if (slider->value() <= slider->minimum())

            state |= Unavailable;

        break;

    case PageRight:

        if (slider->value() >= slider->maximum())

            state |= Unavailable;

        break;

    case Position:

    default:

        break;

    }

    return state;

}

//! [7]

int QAccessibleSlider::defaultAction(int child) const

{

    switch (child) {

        case SliderSelf:

            return SetFocus;

        case PageLeft:

            return Press;

        case PageRight:

            return Press;

    }

    return 0;

}

// Name, Description, Value, Help, Accelerator

static const char * const actionTexts[][5] =

{

    {"Press", "Decreases the value of the slider", "", "", "Ctrl+L"},

    {"Press", "Increaces the value of the slider", "", "", "Ctrl+R"}

};

QString QAccessibleSlider::actionText(int action, Text text, int child) const

{

    if (action != Press || child < 1 || child > 2)

        return QAccessibleAbstractSlider::actionText(action, text, child);        

    return actionTexts[child - 1][t];

}

bool QAccessibleSlider::doAction(int action, int child)

{

    if (action != Press || child < 1 || child > 2)

        return false;

    if (child == PageLeft)

        slider()->setValue(slider()->value() - slider()->pageStep());

    else

        slider()->setValue(slider()->value() + slider()->pageStep());

}

QAccessibleAbstractSlider::QAccessibleAbstractSlider(QWidget *w, Role r)

    : QAccessibleWidgetEx(w, r)

{

    Q_ASSERT(qobject_cast<QAbstractSlider *>(w));

}

QVariant QAccessibleAbstractSlider::invokeMethodEx(Method method, int child, const QVariantList &params)

{

    switch (method) {

    case ListSupportedMethods: {

        QSet<QAccessible::Method> set;

        set << ListSupportedMethods;

        return qVariantFromValue(set | qvariant_cast<QSet<QAccessible::Method> >(

                    QAccessibleWidgetEx::invokeMethodEx(method, child, params)));

    }

    default:

        return QAccessibleWidgetEx::invokeMethodEx(method, child, params);

    }

}

QVariant QAccessibleAbstractSlider::currentValue()

{

    return abstractSlider()->value();

}

void QAccessibleAbstractSlider::setCurrentValue(const QVariant &value)

{

    abstractSlider()->setValue(value.toInt());

}

QVariant QAccessibleAbstractSlider::maximumValue()

{

    return abstractSlider()->maximum();

}

QVariant QAccessibleAbstractSlider::minimumValue()

{

    return abstractSlider()->minimum();

}

QAbstractSlider *QAccessibleAbstractSlider::abstractSlider() const

{

    return static_cast<QAbstractSlider *>(object());

}