C++ QDeclarativeAbstractBinding类代码示例

/*!
    Returns the binding associated with this property, or 0 if no binding 
    exists.
*/
QDeclarativeAbstractBinding *
QDeclarativePropertyPrivate::binding(const QDeclarativeProperty &that) 
{
    if (!that.isProperty() || !that.d->object)
        return 0;

    QDeclarativeDeclarativeData *data = QDeclarativeDeclarativeData::get(that.d->object);
    if (!data) 
        return 0;

    if (!data->hasBindingBit(that.d->core.coreIndex))
        return 0;

    QDeclarativeAbstractBinding *binding = data->bindings;
    while (binding && binding->propertyIndex() != that.d->core.coreIndex) 
        binding = binding->m_nextBinding;

    if (binding && that.d->valueType.valueTypeCoreIdx != -1) {
        if (binding->bindingType() == QDeclarativeAbstractBinding::ValueTypeProxy) {
            QDeclarativeValueTypeProxyBinding *proxy = static_cast<QDeclarativeValueTypeProxyBinding *>(binding);

            binding = proxy->binding(bindingIndex(that));
        }
    }

    return binding;
}

void QDeclarativeValueTypeScriptClass::setProperty(Object *obj, const Identifier &,
                                                   const QScriptValue &value)
{
    QDeclarativeValueTypeObject *o = static_cast<QDeclarativeValueTypeObject *>(obj);

    QVariant v = QDeclarativeEnginePrivate::get(engine)->scriptValueToVariant(value);

    if (o->objectType == QDeclarativeValueTypeObject::Reference) {
        QDeclarativeValueTypeReference *ref = static_cast<QDeclarativeValueTypeReference *>(obj);

        ref->type->read(ref->object, ref->property);
        QMetaProperty p = ref->type->metaObject()->property(m_lastIndex);

        QDeclarativeBinding *newBinding = 0;
        if (value.isFunction() && !value.isRegExp()) {
            QDeclarativeContextData *ctxt = QDeclarativeEnginePrivate::get(engine)->getContext(context());

            QDeclarativePropertyCache::Data cacheData;
            cacheData.flags = QDeclarativePropertyCache::Data::IsWritable;
            cacheData.propType = ref->object->metaObject()->property(ref->property).userType();
            cacheData.coreIndex = ref->property;

            QDeclarativePropertyCache::ValueTypeData valueTypeData;
            valueTypeData.valueTypeCoreIdx = m_lastIndex;
            valueTypeData.valueTypePropType = p.userType();

            newBinding = new QDeclarativeBinding(value, ref->object, ctxt);
            QScriptContextInfo ctxtInfo(context());
            newBinding->setSourceLocation(ctxtInfo.fileName(), ctxtInfo.functionStartLineNumber());
            QDeclarativeProperty prop = QDeclarativePropertyPrivate::restore(cacheData, valueTypeData, ref->object, ctxt);
            newBinding->setTarget(prop);
            if (newBinding->expression().contains(QLatin1String("this")))
                newBinding->setEvaluateFlags(newBinding->evaluateFlags() | QDeclarativeBinding::RequiresThisObject);
        }

        QDeclarativeAbstractBinding *delBinding =
            QDeclarativePropertyPrivate::setBinding(ref->object, ref->property, m_lastIndex, newBinding);
        if (delBinding)
            delBinding->destroy();

        if (p.isEnumType() && (QMetaType::Type)v.type() == QMetaType::Double)
            v = v.toInt();
        p.write(ref->type, v);
        ref->type->write(ref->object, ref->property, 0);

    } else {
        QDeclarativeValueTypeCopy *copy = static_cast<QDeclarativeValueTypeCopy *>(obj);
        copy->type->setValue(copy->value);
        QMetaProperty p = copy->type->metaObject()->property(m_lastIndex);
        p.write(copy->type, v);
        copy->value = copy->type->value();
    }
}

void QDeclarativeAbstractBinding::addToObject(QObject *object)
{
    Q_ASSERT(object);

    if (m_object == object)
        return;

    int index = propertyIndex();

    removeFromObject();

    Q_ASSERT(!m_prevBinding);

    m_object = object;
    QDeclarativeData *data = QDeclarativeData::get(object, true);

    if (index & 0xFF000000) {
        // Value type

        int coreIndex = index & 0xFFFFFF;

        // Find the value type proxy (if there is one)
        QDeclarativeValueTypeProxyBinding *proxy = 0;
        if (data->hasBindingBit(coreIndex)) {
            QDeclarativeAbstractBinding *b = data->bindings;
            while (b && b->propertyIndex() != coreIndex)
                b = b->m_nextBinding;
            Q_ASSERT(b && b->bindingType() == QDeclarativeAbstractBinding::ValueTypeProxy);
            proxy = static_cast<QDeclarativeValueTypeProxyBinding *>(b);
        }

        if (!proxy) 
            proxy = new QDeclarativeValueTypeProxyBinding(object, coreIndex);
        proxy->addToObject(object);

        m_nextBinding = proxy->m_bindings;
        if (m_nextBinding) m_nextBinding->m_prevBinding = &m_nextBinding;
        m_prevBinding = &proxy->m_bindings;
        proxy->m_bindings = this;

    } else {
        m_nextBinding = data->bindings;
        if (m_nextBinding) m_nextBinding->m_prevBinding = &m_nextBinding;
        m_prevBinding = &data->bindings;
        data->bindings = this;

        data->setBindingBit(m_object, index);
    }
}

void ObjectNodeInstance::setPropertyBinding(const QString &name, const QString &expression)
{
    QDeclarativeProperty property(object(), name, context());

    if (!property.isValid())
        return;

    if (property.isProperty()) {
        QDeclarativeBinding *binding = new QDeclarativeBinding(expression, object(), context());
        binding->setTarget(property);
        binding->setNotifyOnValueChanged(true);
        QDeclarativeAbstractBinding *oldBinding = QDeclarativePropertyPrivate::setBinding(property, binding);
        if (oldBinding)
            oldBinding->destroy();
        binding->update();
    } else {
        qWarning() << "Cannot set binding for property" << name << ": property is unknown for type"
                   << (modelNode().isValid() ? modelNode().type() : "unknown");
    }
}

bool QDeclarativePropertyPrivate::writeValueProperty(const QVariant &value, WriteFlags flags)
{
    // Remove any existing bindings on this property
    if (!(flags & DontRemoveBinding)) {
        QDeclarativeAbstractBinding *binding = setBinding(*q, 0);
        if (binding) binding->destroy();
    }

    bool rv = false;
    if (isValueType()) {
        QDeclarativeEnginePrivate *ep = QDeclarativeEnginePrivate::get(context);

        QDeclarativeValueType *writeBack = 0;
        if (ep) {
            writeBack = ep->valueTypes[core.propType];
        } else {
            writeBack = QDeclarativeValueTypeFactory::valueType(core.propType);
        }

        writeBack->read(object, core.coreIndex);

        QDeclarativePropertyCache::Data data = core;
        data.flags = valueType.flags;
        data.coreIndex = valueType.valueTypeCoreIdx;
        data.propType = valueType.valueTypePropType;
        rv = write(writeBack, data, value, context, flags);

        writeBack->write(object, core.coreIndex, flags);
        if (!ep) delete writeBack;

    } else {

        rv = write(object, core, value, context, flags);

    }

    return rv;
}

//.........这里部分代码省略.........
            }

            id -= metaData->propertyCount;

            if (id < metaData->aliasCount) {

                QDeclarativeVMEMetaData::AliasData *d = metaData->aliasData() + id;

                if (d->flags & QML_ALIAS_FLAG_PTR && c == QMetaObject::ReadProperty) 
                        *reinterpret_cast<void **>(a[0]) = 0;

                if (!ctxt) return -1;

                QDeclarativeContext *context = ctxt->asQDeclarativeContext();
                QDeclarativeContextPrivate *ctxtPriv = QDeclarativeContextPrivate::get(context);

                QObject *target = ctxtPriv->data->idValues[d->contextIdx].data();
                if (!target) 
                    return -1;

                connectAlias(id);

                if (d->isObjectAlias()) {
                    *reinterpret_cast<QObject **>(a[0]) = target;
                    return -1;
                } 
                
                // Remove binding (if any) on write
                if(c == QMetaObject::WriteProperty) {
                    int flags = *reinterpret_cast<int*>(a[3]);
                    if (flags & QDeclarativePropertyPrivate::RemoveBindingOnAliasWrite) {
                        QDeclarativeData *targetData = QDeclarativeData::get(target);
                        if (targetData && targetData->hasBindingBit(d->propertyIndex())) {
                            QDeclarativeAbstractBinding *binding = QDeclarativePropertyPrivate::setBinding(target, d->propertyIndex(), d->isValueTypeAlias()?d->valueTypeIndex():-1, 0);
                            if (binding) binding->destroy();
                        }
                    }
                }
                
                if (d->isValueTypeAlias()) {
                    // Value type property
                    QDeclarativeEnginePrivate *ep = QDeclarativeEnginePrivate::get(ctxt->engine);

                    QDeclarativeValueType *valueType = ep->valueTypes[d->valueType()];
                    Q_ASSERT(valueType);

                    valueType->read(target, d->propertyIndex());
                    int rv = QMetaObject::metacall(valueType, c, d->valueTypeIndex(), a);
                    
                    if (c == QMetaObject::WriteProperty)
                        valueType->write(target, d->propertyIndex(), 0x00);

                    return rv;

                } else {
                    return QMetaObject::metacall(target, c, d->propertyIndex(), a);
                }

            }
            return -1;

        }

    } else if(c == QMetaObject::InvokeMetaMethod) {

        if (id >= methodOffset) {

QObject *QDeclarativeVME::run(QDeclarativeVMEObjectStack &stack, 
                              QDeclarativeContextData *ctxt, 
                              QDeclarativeCompiledData *comp, 
                              int start, int count, 
                              const QBitField &bindingSkipList)
{
    Q_ASSERT(comp);
    Q_ASSERT(ctxt);
    const QList<QDeclarativeCompiledData::TypeReference> &types = comp->types;
    const QList<QString> &primitives = comp->primitives;
    const QList<QByteArray> &datas = comp->datas;
    const QList<QDeclarativeCompiledData::CustomTypeData> &customTypeData = comp->customTypeData;
    const QList<int> &intData = comp->intData;
    const QList<float> &floatData = comp->floatData;
    const QList<QDeclarativePropertyCache *> &propertyCaches = comp->propertyCaches;
    const QList<QDeclarativeParser::Object::ScriptBlock> &scripts = comp->scripts;
    const QList<QUrl> &urls = comp->urls;

    QDeclarativeEnginePrivate::SimpleList<QDeclarativeAbstractBinding> bindValues;
    QDeclarativeEnginePrivate::SimpleList<QDeclarativeParserStatus> parserStatus;

    QDeclarativeVMEStack<ListInstance> qliststack;

    vmeErrors.clear();
    QDeclarativeEnginePrivate *ep = QDeclarativeEnginePrivate::get(ctxt->engine);

    int status = -1;    //for dbus
    QDeclarativePropertyPrivate::WriteFlags flags = QDeclarativePropertyPrivate::BypassInterceptor |
                                                    QDeclarativePropertyPrivate::RemoveBindingOnAliasWrite;

    for (int ii = start; !isError() && ii < (start + count); ++ii) {
        const QDeclarativeInstruction &instr = comp->bytecode.at(ii);

        switch(instr.type) {
        case QDeclarativeInstruction::Init:
            {
                if (instr.init.bindingsSize) 
                    bindValues = QDeclarativeEnginePrivate::SimpleList<QDeclarativeAbstractBinding>(instr.init.bindingsSize);
                if (instr.init.parserStatusSize)
                    parserStatus = QDeclarativeEnginePrivate::SimpleList<QDeclarativeParserStatus>(instr.init.parserStatusSize);
                if (instr.init.contextCache != -1) 
                    ctxt->setIdPropertyData(comp->contextCaches.at(instr.init.contextCache));
                if (instr.init.compiledBinding != -1) 
                    ctxt->optimizedBindings = new QDeclarativeCompiledBindings(datas.at(instr.init.compiledBinding).constData(), ctxt, comp);
            }
            break;

        case QDeclarativeInstruction::CreateObject:
            {
                QBitField bindings;
                if (instr.create.bindingBits != -1) {
                    const QByteArray &bits = datas.at(instr.create.bindingBits);
                    bindings = QBitField((const quint32*)bits.constData(),
                                         bits.size() * 8);
                }
                if (stack.isEmpty())
                    bindings = bindings.united(bindingSkipList);

                QObject *o = 
                    types.at(instr.create.type).createInstance(ctxt, bindings, &vmeErrors);

                if (!o) {
                    VME_EXCEPTION(QCoreApplication::translate("QDeclarativeVME","Unable to create object of type %1").arg(QString::fromLatin1(types.at(instr.create.type).className)));
                }

                QDeclarativeData *ddata = QDeclarativeData::get(o);
                Q_ASSERT(ddata);

                if (stack.isEmpty()) {
                    if (ddata->context) {
                        Q_ASSERT(ddata->context != ctxt);
                        Q_ASSERT(ddata->outerContext);
                        Q_ASSERT(ddata->outerContext != ctxt);
                        QDeclarativeContextData *c = ddata->context;
                        while (c->linkedContext) c = c->linkedContext;
                        c->linkedContext = ctxt;
                    } else {
                        ctxt->addObject(o);
                    }

                    ddata->ownContext = true;
                } else if (!ddata->context) {
                    ctxt->addObject(o);
                }

                ddata->setImplicitDestructible();
                ddata->outerContext = ctxt;
                ddata->lineNumber = instr.line;
                ddata->columnNumber = instr.create.column;

                if (instr.create.data != -1) {
                    QDeclarativeCustomParser *customParser =
                        types.at(instr.create.type).type->customParser();
                    customParser->setCustomData(o, datas.at(instr.create.data));
                }
                if (!stack.isEmpty()) {
                    QObject *parent = stack.top();
                    if (o->isWidgetType()) { 
                        QWidget *widget = static_cast<QWidget*>(o); 
                        if (parent->isWidgetType()) { 
//.........这里部分代码省略.........

static void removeBindingOnProperty(QObject *o, int index)
{
    QDeclarativeAbstractBinding *binding = QDeclarativePropertyPrivate::setBinding(o, index, -1, 0);
    if (binding) binding->destroy();
}

void QDeclarativeObjectScriptClass::setProperty(QObject *obj,
                                                const Identifier &name,
                                                const QScriptValue &value,
                                                QScriptContext *context,
                                                QDeclarativeContextData *evalContext)
{
    Q_UNUSED(name);

    Q_ASSERT(obj);
    Q_ASSERT(lastData);
    Q_ASSERT(context);

    if (!lastData->isValid()) {
        QString error = QLatin1String("Cannot assign to non-existent property \"") +
                        toString(name) + QLatin1Char('\"');
        context->throwError(error);
        return;
    }

    if (!(lastData->flags & QDeclarativePropertyCache::Data::IsWritable) && 
        !(lastData->flags & QDeclarativePropertyCache::Data::IsQList)) {
        QString error = QLatin1String("Cannot assign to read-only property \"") +
                        toString(name) + QLatin1Char('\"');
        context->throwError(error);
        return;
    }

    QDeclarativeEnginePrivate *enginePriv = QDeclarativeEnginePrivate::get(engine);

    if (!evalContext) {
        // Global object, QScriptContext activation object, QDeclarativeContext object
        QScriptValue scopeNode = scopeChainValue(context, -3);
        if (scopeNode.isValid()) {
            Q_ASSERT(scriptClass(scopeNode) == enginePriv->contextClass);

            evalContext = enginePriv->contextClass->contextFromValue(scopeNode);
        }
    }

    QDeclarativeAbstractBinding *delBinding =
        QDeclarativePropertyPrivate::setBinding(obj, lastData->coreIndex, -1, 0);
    if (delBinding)
        delBinding->destroy();

    if (value.isNull() && lastData->flags & QDeclarativePropertyCache::Data::IsQObjectDerived) {
        QObject *o = 0;
        int status = -1;
        int flags = 0;
        void *argv[] = { &o, 0, &status, &flags };
        QMetaObject::metacall(obj, QMetaObject::WriteProperty, lastData->coreIndex, argv);
    } else if (value.isUndefined() && lastData->flags & QDeclarativePropertyCache::Data::IsResettable) {
        void *a[] = { 0 };
        QMetaObject::metacall(obj, QMetaObject::ResetProperty, lastData->coreIndex, a);
    } else if (value.isUndefined() && lastData->propType == qMetaTypeId<QVariant>()) {
        QDeclarativePropertyPrivate::write(obj, *lastData, QVariant(), evalContext);
    } else if (value.isUndefined()) {
        QString error = QLatin1String("Cannot assign [undefined] to ") +
                        QLatin1String(QMetaType::typeName(lastData->propType));
        context->throwError(error);
    } else {
        QVariant v;
        if (lastData->flags & QDeclarativePropertyCache::Data::IsQList)
            v = enginePriv->scriptValueToVariant(value, qMetaTypeId<QList<QObject *> >());
        else
            v = enginePriv->scriptValueToVariant(value, lastData->propType);

        if (!QDeclarativePropertyPrivate::write(obj, *lastData, v, evalContext)) {
            const char *valueType = 0;
            if (v.userType() == QVariant::Invalid) valueType = "null";
            else valueType = QMetaType::typeName(v.userType());

            QString error = QLatin1String("Cannot assign ") +
                            QLatin1String(valueType) +
                            QLatin1String(" to ") +
                            QLatin1String(QMetaType::typeName(lastData->propType));
            context->throwError(error);
        }
    }
}

void QDeclarativeObjectScriptClass::setProperty(QObject *obj,
                                                const Identifier &name,
                                                const QScriptValue &value,
                                                QScriptContext *context,
                                                QDeclarativeContextData *evalContext)
{
    Q_UNUSED(name);

    Q_ASSERT(obj);
    Q_ASSERT(lastData);
    Q_ASSERT(context);

    if (!lastData->isValid()) {
        QString error = QLatin1String("Cannot assign to non-existent property \"") +
                        toString(name) + QLatin1Char('\"');
        context->throwError(error);
        return;
    }

    if (!(lastData->flags & QDeclarativePropertyCache::Data::IsWritable) && 
        !(lastData->flags & QDeclarativePropertyCache::Data::IsQList)) {
        QString error = QLatin1String("Cannot assign to read-only property \"") +
                        toString(name) + QLatin1Char('\"');
        context->throwError(error);
        return;
    }

    QDeclarativeEnginePrivate *enginePriv = QDeclarativeEnginePrivate::get(engine);

    if (!evalContext) {
        // Global object, QScriptContext activation object, QDeclarativeContext object
        QScriptValue scopeNode = scopeChainValue(context, -3);
        if (scopeNode.isValid()) {
            Q_ASSERT(scriptClass(scopeNode) == enginePriv->contextClass);

            evalContext = enginePriv->contextClass->contextFromValue(scopeNode);
        }
    }

    QDeclarativeBinding *newBinding = 0;
    if (value.isFunction() && !value.isRegExp()) {
        QScriptContextInfo ctxtInfo(context);
        QDeclarativePropertyCache::ValueTypeData valueTypeData;

        newBinding = new QDeclarativeBinding(value, obj, evalContext);
        newBinding->setSourceLocation(ctxtInfo.fileName(), ctxtInfo.functionStartLineNumber());
        newBinding->setTarget(QDeclarativePropertyPrivate::restore(*lastData, valueTypeData, obj, evalContext));
        if (newBinding->expression().contains(QLatin1String("this")))
            newBinding->setEvaluateFlags(newBinding->evaluateFlags() | QDeclarativeBinding::RequiresThisObject);
    }

    QDeclarativeAbstractBinding *delBinding =
        QDeclarativePropertyPrivate::setBinding(obj, lastData->coreIndex, -1, newBinding);
    if (delBinding)
        delBinding->destroy();

    if (value.isNull() && lastData->flags & QDeclarativePropertyCache::Data::IsQObjectDerived) {
        QObject *o = 0;
        int status = -1;
        int flags = 0;
        void *argv[] = { &o, 0, &status, &flags };
        QMetaObject::metacall(obj, QMetaObject::WriteProperty, lastData->coreIndex, argv);
    } else if (value.isUndefined() && lastData->flags & QDeclarativePropertyCache::Data::IsResettable) {
        void *a[] = { 0 };
        QMetaObject::metacall(obj, QMetaObject::ResetProperty, lastData->coreIndex, a);
    } else if (value.isUndefined() && lastData->propType == qMetaTypeId<QVariant>()) {
        QDeclarativePropertyPrivate::write(obj, *lastData, QVariant(), evalContext);
    } else if (value.isUndefined()) {
        QString error = QLatin1String("Cannot assign [undefined] to ") +
                        QLatin1String(QMetaType::typeName(lastData->propType));
        context->throwError(error);
    } else if (value.isFunction() && !value.isRegExp()) {
        // this is handled by the binding creation above
    } else {
        //### expand optimization for other known types
        if (lastData->propType == QMetaType::Int && value.isNumber()) {
            int rawValue = qRoundDouble(value.toNumber());
            int status = -1;
            int flags = 0;
            void *a[] = { (void *)&rawValue, 0, &status, &flags };
            QMetaObject::metacall(obj, QMetaObject::WriteProperty,
                                  lastData->coreIndex, a);
            return;
        } else if (lastData->propType == QMetaType::QReal && value.isNumber()) {
            qreal rawValue = qreal(value.toNumber());
            int status = -1;
            int flags = 0;
            void *a[] = { (void *)&rawValue, 0, &status, &flags };
            QMetaObject::metacall(obj, QMetaObject::WriteProperty,
                                  lastData->coreIndex, a);
            return;
        } else if (lastData->propType == QMetaType::QString && value.isString()) {
            const QString &rawValue = value.toString();
            int status = -1;
            int flags = 0;
            void *a[] = { (void *)&rawValue, 0, &status, &flags };
            QMetaObject::metacall(obj, QMetaObject::WriteProperty,
                                  lastData->coreIndex, a);
            return;
        }
//.........这里部分代码省略.........

void tst_QDeclarativeDebug::recursiveObjectTest(QObject *o, const QDeclarativeDebugObjectReference &oref, bool recursive) const
{
    const QMetaObject *meta = o->metaObject();

    QDeclarativeType *type = QDeclarativeMetaType::qmlType(meta);
    QString className = type ? QString(type->qmlTypeName()) : QString(meta->className());
    className = className.mid(className.lastIndexOf(QLatin1Char('/'))+1);

    QCOMPARE(oref.debugId(), QDeclarativeDebugService::idForObject(o));
    QCOMPARE(oref.name(), o->objectName());
    QCOMPARE(oref.className(), className);
    QCOMPARE(oref.contextDebugId(), QDeclarativeDebugService::idForObject(qmlContext(o)));

    const QObjectList &children = o->children();
    for (int i=0; i<children.count(); i++) {
        QObject *child = children[i];
        if (!qmlContext(child))
            continue;
        int debugId = QDeclarativeDebugService::idForObject(child);
        QVERIFY(debugId >= 0);

        QDeclarativeDebugObjectReference cref;
        foreach (const QDeclarativeDebugObjectReference &ref, oref.children()) {
            if (ref.debugId() == debugId) {
                cref = ref;
                break;
            }
        }
        QVERIFY(cref.debugId() >= 0);

        if (recursive)
            recursiveObjectTest(child, cref, true);
    }

    foreach (const QDeclarativeDebugPropertyReference &p, oref.properties()) {
        QCOMPARE(p.objectDebugId(), QDeclarativeDebugService::idForObject(o));

        // signal properties are fake - they are generated from QDeclarativeBoundSignal children
        if (p.name().startsWith("on") && p.name().length() > 2 && p.name()[2].isUpper()) {
            QVERIFY(p.value().toString().startsWith('{') && p.value().toString().endsWith('}'));
            QVERIFY(p.valueTypeName().isEmpty());
            QVERIFY(p.binding().isEmpty());
            QVERIFY(!p.hasNotifySignal());
            continue;
        }

        QMetaProperty pmeta = meta->property(meta->indexOfProperty(p.name().toUtf8().constData()));

        QCOMPARE(p.name(), QString::fromUtf8(pmeta.name()));

        if (pmeta.type() > 0 && pmeta.type() < QVariant::UserType) // TODO test complex types
            QCOMPARE(p.value(), pmeta.read(o));

        if (p.name() == "parent")
            QVERIFY(p.valueTypeName() == "QGraphicsObject*" || p.valueTypeName() == "QDeclarativeItem*");
        else
            QCOMPARE(p.valueTypeName(), QString::fromUtf8(pmeta.typeName()));

        QDeclarativeAbstractBinding *binding = 
            QDeclarativePropertyPrivate::binding(QDeclarativeProperty(o, p.name()));
        if (binding)
            QCOMPARE(binding->expression(), p.binding());

        QCOMPARE(p.hasNotifySignal(), pmeta.hasNotifySignal());

        QVERIFY(pmeta.isValid());
    }
}