C++ QAccessibleInterface::indexOfChild方法代码示例

void tst_QQuickAccessible::basicPropertiesTest()
{
    QAccessibleInterface *app = QAccessible::queryAccessibleInterface(qApp);
    QCOMPARE(app->childCount(), 0);

    QQuickView *window = new QQuickView();
    window->setSource(testFileUrl("statictext.qml"));
    window->show();
    QCOMPARE(app->childCount(), 1);

    QAccessibleInterface *iface = QAccessible::queryAccessibleInterface(window);
    QVERIFY(iface);
    QCOMPARE(iface->childCount(), 1);

    QAccessibleInterface *item = iface->child(0);
    QVERIFY(item);
    QCOMPARE(item->childCount(), 2);
    QCOMPARE(item->rect().size(), QSize(400, 400));
    QCOMPARE(item->role(), QAccessible::Client);
    QCOMPARE(iface->indexOfChild(item), 0);

    QAccessibleInterface *text = item->child(0);
    QVERIFY(text);
    QCOMPARE(text->childCount(), 0);

    QCOMPARE(text->text(QAccessible::Name), QLatin1String("Hello Accessibility"));
    QCOMPARE(text->rect().size(), QSize(200, 50));
    QCOMPARE(text->rect().x(), item->rect().x() + 100);
    QCOMPARE(text->rect().y(), item->rect().y() + 20);
    QCOMPARE(text->role(), QAccessible::StaticText);
    QCOMPARE(item->indexOfChild(text), 0);

    QAccessibleInterface *text2 = item->child(1);
    QVERIFY(text2);
    QCOMPARE(text2->childCount(), 0);

    QCOMPARE(text2->text(QAccessible::Name), QLatin1String("The Hello 2 accessible text"));
    QCOMPARE(text2->rect().size(), QSize(100, 40));
    QCOMPARE(text2->rect().x(), item->rect().x() + 100);
    QCOMPARE(text2->rect().y(), item->rect().y() + 40);
    QCOMPARE(text2->role(), QAccessible::StaticText);
    QCOMPARE(item->indexOfChild(text2), 1);

    QCOMPARE(iface->indexOfChild(text2), -1);
    QCOMPARE(text2->indexOfChild(item), -1);

    delete window;
    QTestAccessibility::clearEvents();
}

//.........这里部分代码省略.........
                        delete sibling;
                        continue;
                    }
                    distp = sibp - startp;
                    break;
		default:
		    break;
                }

                int dist = (int)qSqrt((qreal)distp.x() * distp.x() + distp.y() * distp.y());
                if (dist < mindist) {
                    delete candidate;
                    candidate = sibling;
                    mindist = dist;
                } else {
                    delete sibling;
                }
            }
            delete pIface;
            *target = candidate;
            if (*target)
                return 0;
        }
        break;
    case Covers:
        if (entry > 0) {
            QAccessibleInterface *pIface = QAccessible::queryAccessibleInterface(parentObject());
            if (!pIface)
                return -1;

            QRect r = rect(0);
            int sibCount = pIface->childCount();
            QAccessibleInterface *sibling = 0;
            for (int i = pIface->indexOfChild(this) + 1; i <= sibCount && entry; ++i) {
                pIface->navigate(Child, i, &sibling);
                if (!sibling || (sibling->state(0) & Invisible)) {
                    delete sibling;
                    sibling = 0;
                    continue;
                }
                if (sibling->rect(0).intersects(r))
                    --entry;
                if (!entry)
                    break;
                delete sibling;
                sibling = 0;
            }
            delete pIface;
            *target = sibling;
            if (*target)
                return 0;
        }
        break;
    case Covered:
        if (entry > 0) {
            QAccessibleInterface *pIface = QAccessible::queryAccessibleInterface(parentObject());
            if (!pIface)
                return -1;

            QRect r = rect(0);
            int index = pIface->indexOfChild(this);
            QAccessibleInterface *sibling = 0;
            for (int i = 1; i < index && entry; ++i) {
                pIface->navigate(Child, i, &sibling);
                Q_ASSERT(sibling);
                if (!sibling || (sibling->state(0) & Invisible)) {

HRESULT STDMETHODCALLTYPE QWindowsAccessible::accNavigate(long navDir, VARIANT varStart, VARIANT *pvarEnd)
{
#ifdef DEBUG_SHOW_ATCLIENT_COMMANDS
    showDebug(__FUNCTION__, accessible);
#endif //DEBUG_SHOW_ATCLIENT_COMMANDS
    if (!accessible->isValid())
        return E_FAIL;

    QAccessibleInterface *acc = 0;
    int control = -1;
    switch(navDir) {
    case NAVDIR_FIRSTCHILD:
        control = accessible->navigate(Child, 1, &acc);
        break;
    case NAVDIR_LASTCHILD:
        control = accessible->navigate(Child, accessible->childCount(), &acc);
        break;
    case NAVDIR_NEXT:
    case NAVDIR_PREVIOUS:
        if (!varStart.lVal){
            QAccessibleInterface *parent = 0;
            accessible->navigate(Ancestor, 1, &parent);
            if (parent) {
                int index = parent->indexOfChild(accessible);
                index += (navDir == NAVDIR_NEXT) ? 1 : -1;
                if (index > 0 && index <= parent->childCount())
                    control = parent->navigate(Child, index, &acc);
                delete parent;
            }
        } else {
            int index = varStart.lVal;
            index += (navDir == NAVDIR_NEXT) ? 1 : -1;
            if (index > 0 && index <= accessible->childCount())
                control = accessible->navigate(Child, index, &acc);
        }
        break;
    case NAVDIR_UP:
        control = accessible->navigate(Up, varStart.lVal, &acc);
        break;
    case NAVDIR_DOWN:
        control = accessible->navigate(Down, varStart.lVal, &acc);
        break;
    case NAVDIR_LEFT:
        control = accessible->navigate(Left, varStart.lVal, &acc);
        break;
    case NAVDIR_RIGHT:
        control = accessible->navigate(Right, varStart.lVal, &acc);
        break;
    default:
        break;
    }
    if (control == -1) {
        (*pvarEnd).vt = VT_EMPTY;
        return S_FALSE;
    }
    if (!acc) {
        (*pvarEnd).vt = VT_I4;
        (*pvarEnd).lVal = control;
        return S_OK;
    }

    QWindowsAccessible* wacc = new QWindowsAccessible(acc);

    IDispatch *iface = 0;
    wacc->QueryInterface(IID_IDispatch, (void**)&iface);
    if (iface) {
        (*pvarEnd).vt = VT_DISPATCH;
        (*pvarEnd).pdispVal = iface;
        return S_OK;
    } else {
        delete wacc;
    }

    (*pvarEnd).vt = VT_EMPTY;
    return S_FALSE;
}

/*! \reimp */
QAccessible::Relation QAccessibleWidget::relationTo(int child,
            const QAccessibleInterface *other, int otherChild) const
{
    Relation relation = Unrelated;
    if (d->asking == this) // recursive call
        return relation;

    QObject *o = other ? other->object() : 0;
    if (!o)
        return relation;

    QWidget *focus = widget()->focusWidget();
    if (object() == focus && isAncestor(o, focus))
        relation |= FocusChild;

    QACConnectionObject *connectionObject = (QACConnectionObject*)object();
    for (int sig = 0; sig < d->primarySignals.count(); ++sig) {
        if (connectionObject->isSender(o, d->primarySignals.at(sig).toAscii())) {
            relation |= Controller;
            break;
        }
    }
    // test for passive relationships.
    // d->asking protects from endless recursion.
    d->asking = this;
    int inverse = other->relationTo(otherChild, this, child);
    d->asking = 0;

    if (inverse & Controller)
        relation |= Controlled;
    if (inverse & Label)
        relation |= Labelled;

    if(o == object()) {
        if (child && !otherChild)
            return relation | Child;
        if (!child && otherChild)
            return relation | Ancestor;
        if (!child && !otherChild)
            return relation | Self;
    }

    QObject *parent = object()->parent();
    if (o == parent)
        return relation | Child;

    if (o->parent() == parent) {
        relation |= Sibling;
        QAccessibleInterface *sibIface = QAccessible::queryAccessibleInterface(o);
        Q_ASSERT(sibIface);
        QRect wg = rect(0);
        QRect sg = sibIface->rect(0);
        if (wg.intersects(sg)) {
            QAccessibleInterface *pIface = 0;
            sibIface->navigate(Ancestor, 1, &pIface);
            if (pIface && !((sibIface->state(0) | state(0)) & Invisible)) {
                int wi = pIface->indexOfChild(this);
                int si = pIface->indexOfChild(sibIface);

                if (wi > si)
                    relation |= QAccessible::Covers;
                else
                    relation |= QAccessible::Covered;
            }
            delete pIface;
        } else {
            QPoint wc = wg.center();
            QPoint sc = sg.center();
            if (wc.x() < sc.x())
                relation |= QAccessible::Left;
            else if(wc.x() > sc.x())
                relation |= QAccessible::Right;
            if (wc.y() < sc.y())
                relation |= QAccessible::Up;
            else if (wc.y() > sc.y())
                relation |= QAccessible::Down;
        }
        delete sibIface;

        return relation;
    }

    if (isAncestor(o, object()))
        return relation | Descendent;
    if (isAncestor(object(), o))
        return relation | Ancestor;

    return relation;
}