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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 "qmlboundsignal_p.h"
#include "private/qmetaobjectbuilder_p.h"
#include "private/qmlengine_p.h"
#include "private/qmlcontext_p.h"
#include <qfxglobal.h>
#include <qmlmetatype.h>
#include <qml.h>
#include <qmlcontext.h>
QT_BEGIN_NAMESPACE
int QmlBoundSignal::evaluateIdx = -1;
QmlBoundSignal::QmlBoundSignal(QmlContext *ctxt, const QString &val, QObject *me, int idx, QObject *parent)
: QmlExpressionObject(ctxt, val, me, false), _idx(idx)
{
// A cached evaluation of the QmlExpressionObject::value() slot index.
//
// This is thread safe. Although it may be updated by two threads, they
// will both set it to the same value - so the worst thing that can happen
// is that they both do the work to figure it out. Boo hoo.
if(evaluateIdx == -1) evaluateIdx = QmlExpressionObject::staticMetaObject.indexOfMethod("value()");
setTrackChange(false);
QFx_setParent_noEvent(this, parent);
QMetaObject::connect(me, _idx, this, evaluateIdx);
}
QmlBoundSignalProxy::QmlBoundSignalProxy(QmlContext *ctxt, const QString &val, QObject *me, int idx, QObject *parent)
: QmlBoundSignal(ctxt, val, me, idx, parent)
{
QMetaMethod signal = me->metaObject()->method(idx);
params = new QmlBoundSignalParameters(signal, this);
ctxt->d_func()->addDefaultObject(params, QmlContextPrivate::HighPriority);
}
int QmlBoundSignalProxy::qt_metacall(QMetaObject::Call c, int id, void **a)
{
if(c == QMetaObject::InvokeMetaMethod && id == evaluateIdx) {
params->setValues(a);
value();
params->clearValues();
return -1;
} else {
return QmlBoundSignal::qt_metacall(c, id, a);
}
}
#include <QDebug>
QmlBoundSignalParameters::QmlBoundSignalParameters(const QMetaMethod &method,
QObject *parent)
: QObject(parent), types(0), values(0)
{
MetaObject *mo = new MetaObject(this);
// ### Optimize!
// ### Ensure only supported types are allowed, otherwise it might crash
QMetaObjectBuilder mob;
mob.setSuperClass(&QmlBoundSignalParameters::staticMetaObject);
QList<QByteArray> paramTypes = method.parameterTypes();
QList<QByteArray> paramNames = method.parameterNames();
types = new int[paramTypes.count()];
for(int ii = 0; ii < paramTypes.count(); ++ii) {
const QByteArray &type = paramTypes.at(ii);
const QByteArray &name = paramNames.at(ii);
if(name.isEmpty() || type.isEmpty()) {
types[ii] = 0;
continue;
}
QVariant::Type t = (QVariant::Type)QMetaType::type(type.constData());
if(QmlMetaType::isObject(t)) {
types[ii] = QMetaType::QObjectStar;
QMetaPropertyBuilder prop = mob.addProperty(name, "QObject*");
prop.setWritable(false);
} else {
types[ii] = t;
QMetaPropertyBuilder prop = mob.addProperty(name, type);
prop.setWritable(false);
}
}
myMetaObject = mob.toMetaObject();
*static_cast<QMetaObject *>(mo) = *myMetaObject;
d_ptr->metaObject = mo;
}
QmlBoundSignalParameters::~QmlBoundSignalParameters()
{
delete [] types;
qFree(myMetaObject);
}
void QmlBoundSignalParameters::setValues(void **v)
{
values = v;
}
void QmlBoundSignalParameters::clearValues()
{
values = 0;
}
int QmlBoundSignalParameters::metaCall(QMetaObject::Call c, int id, void **a)
{
if(c == QMetaObject::ReadProperty && id >= 1) {
QmlMetaType::copy(types[id - 1], a[0], values[id]);
return -1;
} else {
return qt_metacall(c, id, a);
}
}
QT_END_NAMESPACE
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