C++ QDeclarativeProperty类代码示例

bool QDeclarativePropertyPrivate::write(const QDeclarativeProperty &that,
                                            const QVariant &value, WriteFlags flags) 
{
    if (that.d->object && that.type() & QDeclarativeProperty::Property && 
        that.d->core.isValid() && that.isWritable()) 
        return that.d->writeValueProperty(value, flags);
    else 
        return false;
}

void ObjectNodeInstance::deleteObjectsInList(const QDeclarativeProperty &property)
{
    QObjectList objectList;
    QDeclarativeListReference list = qvariant_cast<QDeclarativeListReference>(property.read());

    if (!hasFullImplementedListInterface(list)) {
        qWarning() << "Property list interface not fully implemented for Class " << property.property().typeName() << " in property " << property.name() << "!";
        return;
    }

    for(int i = 0; i < list.count(); i++) {
        objectList += list.at(i);
    }

    list.clear();
}

static PyObject *meth_QDeclarativeProperty_type(PyObject *sipSelf, PyObject *sipArgs)
{
    PyObject *sipParseErr = NULL;

    {
        QDeclarativeProperty *sipCpp;

        if (sipParseArgs(&sipParseErr, sipArgs, "B", &sipSelf, sipType_QDeclarativeProperty, &sipCpp))
        {
            QDeclarativeProperty::Type sipRes;

            Py_BEGIN_ALLOW_THREADS
            sipRes = sipCpp->type();
            Py_END_ALLOW_THREADS

            return sipConvertFromEnum(sipRes,sipType_QDeclarativeProperty_Type);
        }
    }

void QDeclarativeBehavior::setTarget(const QDeclarativeProperty &property)
{
    Q_D(QDeclarativeBehavior);
    d->property = property;
    d->currentValue = property.read();
    if (d->animation)
        d->animation->setDefaultTarget(property);

    QDeclarativeEnginePrivate *engPriv = QDeclarativeEnginePrivate::get(qmlEngine(this));
    engPriv->registerFinalizedParserStatusObject(this, this->metaObject()->indexOfSlot("componentFinalized()"));
}

static void removeObjectFromList(const QDeclarativeProperty &property, QObject *objectToBeRemoved, QDeclarativeEngine * engine)
{
    QDeclarativeListReference listReference(property.object(), property.name().toLatin1(), engine);

    if (!hasFullImplementedListInterface(listReference)) {
        qWarning() << "Property list interface not fully implemented for Class " << property.property().typeName() << " in property " << property.name() << "!";
        return;
    }

    int count = listReference.count();

    QObjectList objectList;

    for(int i = 0; i < count; i ++) {
        QObject *listItem = listReference.at(i);
        if (listItem != objectToBeRemoved)
            objectList.append(listItem);
    }

    listReference.clear();

    foreach(QObject *object, objectList)
        listReference.append(object);
}

void PQBaseItem::serializeProperty(QTextStream &stream, const QDeclarativeProperty &property, unsigned indentSize) const
{
    QString str;
    QTextStream outStream(&str);
    if (property.propertyTypeCategory() == QDeclarativeProperty::Normal) { // Normal value property
        const int propertyType = property.propertyType();
        const QString propertyValue = property.read().toString();
        if (propertyType >= QVariant::Bool && propertyType <= QVariant::Double) { // Numerical, unquoted values
            outStream << propertyValue;
        } else {
            if (!propertyValue.isEmpty()) {
                QString value = propertyValue;
                value.replace(QLatin1Char('\\'), QLatin1String("\\\\")) // escape backslashes in rich text
                     .replace(QLatin1Char('"'), QLatin1String("\\\"")); // escape quotes
                value = QLatin1Char('"') % value % QLatin1Char('"');
                outStream << value;
            }
        }
    } else if (property.propertyTypeCategory() == QDeclarativeProperty::Object) { // Complex Object type
        const QVariant variantValue = property.read();
        if (variantValue.isValid() && !variantValue.isNull()) {
            serializeObject(outStream, variantValue.value<QObject *>(), indentSize);
        }
    } else if (property.propertyTypeCategory() == QDeclarativeProperty::List) { // List of objects
        const QDeclarativeListReference list = qvariant_cast<QDeclarativeListReference>(property.read());

        outStream << QLatin1Char('[') << endl;
        for (int itemIndex = 0, c = list.count(); itemIndex < c; ++itemIndex) {
            QObject *item = list.at(itemIndex);
            serializeObject(outStream, item, indentSize+1);
            if (itemIndex + 1 != list.count()) {
                outStream << QLatin1Char(','); // separator
            }
            outStream << endl;
        }
        outStream << PQSerializer::indentStep().repeated(indentSize) << QLatin1String("]"); // close list
    }

    if (!str.isEmpty()) {
        stream << PQSerializer::indentStep().repeated(indentSize) 
               << property.name() << QLatin1String(": ") << str
               << endl;
    }
}

static bool isObject(const QDeclarativeProperty &property)
{
    return property.propertyTypeCategory() == QDeclarativeProperty::Object;
}

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 bool isObject(const QDeclarativeProperty &property)
{
    return (property.propertyTypeCategory() == QDeclarativeProperty::Object) ||
            //QVariant can also store QObjects. Lets trust our model.
           (QLatin1String(property.propertyTypeName()) == QLatin1String("QVariant"));
}

void QDeclarativeSpringFollow::setTarget(const QDeclarativeProperty &property)
{
    Q_D(QDeclarativeSpringFollow);
    d->property = property;
    d->currentValue = property.read().toReal();
}