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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the QtDeclarative module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at qt-sales@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#include <qml.h>
#include "qmlbindablevalue.h"
#include "qmlbindablevalue_p.h"
#include <qmlcontext.h>
#include <qmlinfo.h>
#include <QVariant>
#include <qfxperf.h>
#include <QtCore/qdebug.h>
QT_BEGIN_NAMESPACE
DEFINE_BOOL_CONFIG_OPTION(scriptWarnings, QML_SCRIPT_WARNINGS);
QmlBindableValuePrivate::QmlBindableValuePrivate()
: inited(false), updating(false), mePtr(0)
{
}
QML_DEFINE_NOCREATE_TYPE(QmlBindableValue);
QmlBindableValue::QmlBindableValue(QObject *parent)
: QmlPropertyValueSource(*new QmlBindableValuePrivate, parent)
{
qFatal("QmlBindableValue: Default constructor not supported");
}
QmlBindableValue::QmlBindableValue(void *data, QmlRefCount *rc, QObject *obj, QObject *parent)
: QmlPropertyValueSource(*new QmlBindableValuePrivate, parent), QmlExpression(QmlContext::activeContext(), data, rc, obj)
{
}
QmlBindableValue::QmlBindableValue(const QString &str, QObject *obj, bool sse, QObject *parent)
: QmlPropertyValueSource(*new QmlBindableValuePrivate, parent), QmlExpression(QmlContext::activeContext(), str, obj, sse)
{
}
QmlBindableValue::~QmlBindableValue()
{
Q_D(QmlBindableValue);
if(d->mePtr)
*(d->mePtr) = 0;
}
void QmlBindableValue::setTarget(const QmlMetaProperty &prop)
{
Q_D(QmlBindableValue);
d->property = prop;
update();
}
QmlMetaProperty QmlBindableValue::property() const
{
Q_D(const QmlBindableValue);
return d->property;
}
void QmlBindableValue::init()
{
Q_D(QmlBindableValue);
if (d->inited)
return;
d->inited = true;
update();
}
void QmlBindableValue::setExpression(const QString &expr)
{
QmlExpression::setExpression(expr);
update();
}
Q_DECLARE_METATYPE(QList<QObject *>);
void QmlBindableValue::update()
{
Q_D(QmlBindableValue);
#ifdef Q_ENABLE_PERFORMANCE_LOG
QFxPerfTimer<QFxPerf::BindableValueUpdate> bu;
#endif
if (!d->inited)
return;
if (!d->updating) {
d->updating = true;
if (d->property.propertyCategory() == QmlMetaProperty::List) {
QVariant value = this->value();
int listType = QmlMetaType::listType(d->property.propertyType());
if (value.userType() == qMetaTypeId<QList<QObject *> >()) {
const QList<QObject *> &list =
qvariant_cast<QList<QObject *> >(value);
QVariant listVar = d->property.read();
QmlMetaType::clear(listVar);
for (int ii = 0; ii < list.count(); ++ii) {
QVariant v = QmlMetaType::fromObject(list.at(ii), listType);
QmlMetaType::append(listVar, v);
}
} else if (value.type() == uint(listType) ||
value.userType() == listType) {
QVariant listVar = d->property.read();
QmlMetaType::clear(listVar);
QmlMetaType::append(listVar, value);
}
} else if (d->property.propertyCategory() == QmlMetaProperty::QmlList) {
// XXX - optimize!
QVariant value = this->value();
QVariant list = d->property.read();
QmlPrivate::ListInterface *li =
*(QmlPrivate::ListInterface **)list.constData();
int type = li->type();
if (QObject *obj = QmlMetaType::toQObject(value)) {
const QMetaObject *mo =
QmlMetaType::rawMetaObjectForType(type);
const QMetaObject *objMo = obj->metaObject();
bool found = false;
while(!found && objMo) {
if (objMo == mo)
found = true;
else
objMo = objMo->superClass();
}
if (!found) {
qWarning() << "Unable to assign object to list";
return;
}
// NOTE: This assumes a cast to QObject does not alter
// the object pointer
void *d = (void *)&obj;
li->append(d);
}
} else if (d->property.propertyCategory() == QmlMetaProperty::Bindable) {
// NOTE: We assume that only core properties can have
// propertyType == Bindable
int idx = d->property.coreIndex();
Q_ASSERT(idx != -1);
void *a[1];
QmlBindableValue *t = this;
a[0] = (void *)&t;
d->property.object()->qt_metacall(QMetaObject::WriteProperty,
idx, a);
} else if (d->property.propertyCategory() == QmlMetaProperty::Object) {
QVariant value = this->value();
if ((int)value.type() != qMetaTypeId<QObject *>()) {
if (scriptWarnings()) {
if (!value.isValid()) {
qWarning() << "QmlBindableValue: Unable to assign invalid value to object property";
} else {
qWarning() << "QmlBindableValue: Unable to assign non-object to object property";
}
}
return;
}
// NOTE: This assumes a cast to QObject does not alter the
// object pointer
QObject *obj = *(QObject **)value.data();
// NOTE: We assume that only core properties can have
// propertyType == Object
int idx = d->property.coreIndex();
Q_ASSERT(idx != -1);
void *a[1];
a[0] = (void *)&obj;
d->property.object()->qt_metacall(QMetaObject::WriteProperty,
idx, a);
} else if (d->property.propertyCategory() == QmlMetaProperty::Normal) {
QVariant value = this->value();
d->property.write(value);
}
d->updating = false;
} else {
qmlInfo(d->property.object()) << "Binding loop detected for property" << d->property.name();
}
}
void QmlBindableValue::valueChanged()
{
update();
}
QT_END_NAMESPACE
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