qaccessiblewidget.cpp

奇趣公司比较新的qt/emd版本

            }
            */
        }
        break;
    case Label:
        if (entry > 0) {
            QAccessibleInterface *pIface = QAccessible::queryAccessibleInterface(parentObject());
            if (!pIface)
                return -1;

            // first check for all siblings that are labels to us
            // ideally we would go through all objects and check, but that
            // will be too expensive
            int sibCount = pIface->childCount();
            QAccessibleInterface *candidate = 0;
            for (int i = 0; i < sibCount && entry; ++i) {
                pIface->navigate(Child, i+1, &candidate);
                Q_ASSERT(candidate);
                if (candidate->relationTo(0, this, 0) & Label)
                    --entry;
                if (!entry)
                    break;
                delete candidate;
                candidate = 0;
            }
            if (!candidate) {
                if (pIface->relationTo(0, this, 0) & Label)
                    --entry;
                if (!entry)
                    candidate = pIface;
            }
            if (pIface != candidate)
                delete pIface;

            *target = candidate;
            if (*target)
                return 0;
        }
        break;
    case Labelled: // only implemented in subclasses
        break;
    case Controller:
        if (entry > 0) {
            // check all senders we are connected to,
            // and figure out which one are controllers to us
            QACConnectionObject *connectionObject = (QACConnectionObject*)object();
            QObjectList allSenders = connectionObject->senderList();
            QObjectList senders;
            for (int s = 0; s < allSenders.size(); ++s) {
                QObject *sender = allSenders.at(s);
                QAccessibleInterface *candidate = QAccessible::queryAccessibleInterface(sender);
                if (!candidate)
                    continue;
                if (candidate->relationTo(0, this, 0)&Controller)
                    senders << sender;
                delete candidate;
            }
            if (entry <= senders.size())
                targetObject = senders.at(entry-1);
        }
        break;
    case Controlled:
        if (entry > 0) {
            QObjectList allReceivers;
            QACConnectionObject *connectionObject = (QACConnectionObject*)object();
            for (int sig = 0; sig < d->primarySignals.count(); ++sig) {
                QObjectList receivers = connectionObject->receiverList(d->primarySignals.at(sig).toAscii());
                allReceivers += receivers;
            }
            if (entry <= allReceivers.size())
                targetObject = allReceivers.at(entry-1);
        }
        break;
    default:
        break;
    }

    *target = QAccessible::queryAccessibleInterface(targetObject);
    return *target ? 0 : -1;
}

/*! \reimp */
int QAccessibleWidget::childCount() const
{
    QWidgetList cl = childWidgets(widget());
    return cl.size();
}

/*! \reimp */
int QAccessibleWidget::indexOfChild(const QAccessibleInterface *child) const
{
    QWidgetList cl = childWidgets(widget());
    int index = cl.indexOf(qobject_cast<QWidget *>(child->object()));
    if (index != -1)
        ++index;
    return index;
}

// from qwidget.cpp
extern QString qt_setWindowTitle_helperHelper(const QString &, QWidget*);

/*! \reimp */
QString QAccessibleWidget::text(Text t, int child) const
{
    QString str;

    switch (t) {
    case Name:
        if (!d->name.isEmpty()) {
            str = d->name;
        } else if (!widget()->accessibleName().isEmpty()) {
            str = widget()->accessibleName();
        } else if (!child && widget()->isWindow()) {
            if (widget()->isMinimized())
                str = qt_setWindowTitle_helperHelper(widget()->windowIconText(), widget());
            else
                str = qt_setWindowTitle_helperHelper(widget()->windowTitle(), widget());
        } else {
            str = qt_accStripAmp(buddyString(widget()));
        }
        break;
    case Description:
        if (!d->description.isEmpty())
            str = d->description;
        else if (!widget()->accessibleDescription().isEmpty())
            str = widget()->accessibleDescription();
#ifndef QT_NO_TOOLTIP
        else
            str = widget()->toolTip();
#endif
        break;
    case Help:
        if (!d->help.isEmpty())
            str = d->help;
#ifndef QT_NO_WHATSTHIS
        else
            str = widget()->whatsThis();
#endif
        break;
    case Accelerator:
        if (!d->accelerator.isEmpty())
            str = d->accelerator;
        else
            str = qt_accHotKey(buddyString(widget()));
        break;
    case Value:
        str = d->value;
        break;
    default:
        break;
    }
    return str;
}

#ifndef QT_NO_ACTION

/*! \reimp */
int QAccessibleWidget::userActionCount(int child) const
{
    if (child)
        return 0;
    return widget()->actions().count();
}

/*! \reimp */
QString QAccessibleWidget::actionText(int action, Text t, int child) const
{
    if (action == DefaultAction)
        action = SetFocus;

    if (action > 0 && !child) {
        QAction *act = widget()->actions().value(action - 1);
        if (act) {
            switch (t) {
            case Name:
                return act->text();
            case Description:
                return act->toolTip();
#ifndef QT_NO_SHORTCUT
            case Accelerator:
                return act->shortcut().toString();
#endif
            default:
                break;
            }
        }
    }

    return QAccessibleObject::actionText(action, t, child);
}

/*! \reimp */
bool QAccessibleWidget::doAction(int action, int child, const QVariantList &params)
{
    if (action == SetFocus || action == DefaultAction) {
        if (child || !widget()->isEnabled())
            return false;
        if (widget()->focusPolicy() != Qt::NoFocus)
            widget()->setFocus();
        else if (widget()->isWindow())
            widget()->activateWindow();
        else
            return false;
        return true;
    } else if (action > 0) {
        if (QAction *act = widget()->actions().value(action - 1)) {
            act->trigger();
            return true;
        }
    }
    return QAccessibleObject::doAction(action, child, params);
}

#endif // QT_NO_ACTION

/*! \reimp */
QAccessible::Role QAccessibleWidget::role(int child) const
{
    if (!child)
        return d->role;

    QWidgetList childList = childWidgets(widget());
    if (childList.count() > 0 && child <= childList.count()) {
        QWidget *targetWidget = childList.at(child - 1);
        QAccessibleInterface *iface = QAccessible::queryAccessibleInterface(targetWidget);
        if (iface) {
            QAccessible::Role role = iface->role(0);
            delete iface;
            return role;
        }
    }

    return NoRole;
}

/*! \reimp */
QAccessible::State QAccessibleWidget::state(int child) const
{
    if (child)
        return Normal;

    QAccessible::State state = Normal;

    QWidget *w = widget();
    if (w->testAttribute(Qt::WA_WState_Visible) == false)
        state |= Invisible;
    if (w->focusPolicy() != Qt::NoFocus && w->isActiveWindow())
        state |= Focusable;
    if (w->hasFocus())
        state |= Focused;
    if (!w->isEnabled())
        state |= Unavailable;
    if (w->isWindow()) {
        if (w->windowFlags() & Qt::WindowSystemMenuHint)
            state |= Movable;
        if (w->minimumSize() != w->maximumSize())
            state |= Sizeable;
    }

    return state;
}

// ### Qt 5: remove me - binary compatibility hack
QAccessibleWidgetEx::QAccessibleWidgetEx(QWidget *o, Role role, const QString& name)
    : QAccessibleObjectEx(o)
{
    Q_ASSERT(widget());
    d = new QAccessibleWidgetPrivate();
    d->role = role;
    d->name = name;
    d->asking = 0;
}

int QAccessibleWidgetEx::childCount() const
{ return reinterpret_cast<const QAccessibleWidget *>(this)->QAccessibleWidget::childCount(); }
int QAccessibleWidgetEx::indexOfChild(const QAccessibleInterface *child) const
{ return reinterpret_cast<const QAccessibleWidget *>(this)->QAccessibleWidget::indexOfChild(child); }
QAccessible::Relation QAccessibleWidgetEx::relationTo(int child, const QAccessibleInterface *other, int otherChild) const
{ return reinterpret_cast<const QAccessibleWidget *>(this)->QAccessibleWidget::relationTo(child, other, otherChild); }

int QAccessibleWidgetEx::childAt(int x, int y) const
{ return reinterpret_cast<const QAccessibleWidget *>(this)->QAccessibleWidget::childAt(x, y); }
QRect QAccessibleWidgetEx::rect(int child) const
{ return reinterpret_cast<const QAccessibleWidget *>(this)->QAccessibleWidget::rect(child); }
int QAccessibleWidgetEx::navigate(RelationFlag rel, int entry, QAccessibleInterface **target) const
{ return reinterpret_cast<const QAccessibleWidget *>(this)->QAccessibleWidget::navigate(rel, entry, target); }

QString QAccessibleWidgetEx::text(Text t, int child) const
{ return reinterpret_cast<const QAccessibleWidget *>(this)->QAccessibleWidget::text(t, child); }
QAccessible::Role QAccessibleWidgetEx::role(int child) const
{ return reinterpret_cast<const QAccessibleWidget *>(this)->QAccessibleWidget::role(child); }
QAccessible::State QAccessibleWidgetEx::state(int child) const
{ return (reinterpret_cast<const QAccessibleWidget *>(this)->QAccessibleWidget::state(child))
    | HasInvokeExtension; }

QString QAccessibleWidgetEx::actionText(int action, Text t, int child) const
{ return reinterpret_cast<const QAccessibleWidget *>(this)->QAccessibleWidget::actionText(action, t, child); }
bool QAccessibleWidgetEx::doAction(int action, int child, const QVariantList &params)
{ return reinterpret_cast<QAccessibleWidget *>(this)->QAccessibleWidget::doAction(action, child, params); }

QAccessibleWidgetEx::~QAccessibleWidgetEx()
{ delete d; }
QWidget *QAccessibleWidgetEx::widget() const
{ return reinterpret_cast<const QAccessibleWidget *>(this)->QAccessibleWidget::widget(); }
QObject *QAccessibleWidgetEx::parentObject() const
{ return reinterpret_cast<const QAccessibleWidget *>(this)->QAccessibleWidget::parentObject(); }

void QAccessibleWidgetEx::addControllingSignal(const QString &signal)
{ reinterpret_cast<QAccessibleWidget *>(this)->QAccessibleWidget::addControllingSignal(signal); }
void QAccessibleWidgetEx::setValue(const QString &value)
{ reinterpret_cast<QAccessibleWidget *>(this)->QAccessibleWidget::setValue(value); }
void QAccessibleWidgetEx::setDescription(const QString &desc)
{ reinterpret_cast<QAccessibleWidget *>(this)->QAccessibleWidget::setDescription(desc); }
void QAccessibleWidgetEx::setHelp(const QString &help)
{ reinterpret_cast<QAccessibleWidget *>(this)->QAccessibleWidget::setHelp(help); }
void QAccessibleWidgetEx::setAccelerator(const QString &accel)
{ reinterpret_cast<QAccessibleWidget *>(this)->QAccessibleWidget::setAccelerator(accel); }

QVariant QAccessibleWidgetEx::invokeMethodEx(Method method, int child, const QVariantList & /*params*/)
{
    if (child)
        return QVariant();

    switch (method) {
    case ListSupportedMethods: {
        QSet<QAccessible::Method> set;
        set << ListSupportedMethods << ForegroundColor << BackgroundColor;
        return qVariantFromValue(set);
    }
    case ForegroundColor:
        return widget()->palette().color(widget()->foregroundRole());
    case BackgroundColor:
        return widget()->palette().color(widget()->backgroundRole());
    default:
        return QVariant();
    }
}

#endif //QT_NO_ACCESSIBILITY