--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/declarative/qml/qdeclarativeboundsignal.cpp Tue Jul 06 15:10:48 2010 +0300
@@ -0,0 +1,261 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "private/qdeclarativeboundsignal_p.h"
+
+#include "private/qmetaobjectbuilder_p.h"
+#include "private/qdeclarativeengine_p.h"
+#include "private/qdeclarativeexpression_p.h"
+#include "private/qdeclarativecontext_p.h"
+#include "private/qdeclarativemetatype_p.h"
+#include "qdeclarative.h"
+#include "qdeclarativecontext.h"
+#include "private/qdeclarativeglobal_p.h"
+
+#include <QtCore/qdebug.h>
+
+QT_BEGIN_NAMESPACE
+
+class QDeclarativeBoundSignalParameters : public QObject
+{
+Q_OBJECT
+public:
+ QDeclarativeBoundSignalParameters(const QMetaMethod &, QObject * = 0);
+ ~QDeclarativeBoundSignalParameters();
+
+ void setValues(void **);
+ void clearValues();
+
+private:
+ friend class MetaObject;
+ int metaCall(QMetaObject::Call, int _id, void **);
+ struct MetaObject : public QAbstractDynamicMetaObject {
+ MetaObject(QDeclarativeBoundSignalParameters *b)
+ : parent(b) {}
+
+ int metaCall(QMetaObject::Call c, int id, void **a) {
+ return parent->metaCall(c, id, a);
+ }
+ QDeclarativeBoundSignalParameters *parent;
+ };
+
+ int *types;
+ void **values;
+ QMetaObject *myMetaObject;
+};
+
+static int evaluateIdx = -1;
+
+QDeclarativeAbstractBoundSignal::QDeclarativeAbstractBoundSignal(QObject *parent)
+: QObject(parent)
+{
+}
+
+QDeclarativeAbstractBoundSignal::~QDeclarativeAbstractBoundSignal()
+{
+}
+
+QDeclarativeBoundSignal::QDeclarativeBoundSignal(QObject *scope, const QMetaMethod &signal,
+ QObject *parent)
+: m_expression(0), m_signal(signal), m_paramsValid(false), m_isEvaluating(false), m_params(0)
+{
+ // 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 = metaObject()->methodCount();
+
+ QDeclarative_setParent_noEvent(this, parent);
+ QMetaObject::connect(scope, m_signal.methodIndex(), this, evaluateIdx);
+}
+
+QDeclarativeBoundSignal::QDeclarativeBoundSignal(QDeclarativeContext *ctxt, const QString &val,
+ QObject *scope, const QMetaMethod &signal,
+ QObject *parent)
+: m_expression(0), m_signal(signal), m_paramsValid(false), m_isEvaluating(false), m_params(0)
+{
+ // 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 = metaObject()->methodCount();
+
+ QDeclarative_setParent_noEvent(this, parent);
+ QMetaObject::connect(scope, m_signal.methodIndex(), this, evaluateIdx);
+
+ m_expression = new QDeclarativeExpression(ctxt, scope, val);
+}
+
+QDeclarativeBoundSignal::~QDeclarativeBoundSignal()
+{
+ delete m_expression;
+ m_expression = 0;
+}
+
+int QDeclarativeBoundSignal::index() const
+{
+ return m_signal.methodIndex();
+}
+
+/*!
+ Returns the signal expression.
+*/
+QDeclarativeExpression *QDeclarativeBoundSignal::expression() const
+{
+ return m_expression;
+}
+
+/*!
+ Sets the signal expression to \a e. Returns the current signal expression,
+ or null if there is no signal expression.
+
+ The QDeclarativeBoundSignal instance takes ownership of \a e. The caller is
+ assumes ownership of the returned QDeclarativeExpression.
+*/
+QDeclarativeExpression *QDeclarativeBoundSignal::setExpression(QDeclarativeExpression *e)
+{
+ QDeclarativeExpression *rv = m_expression;
+ m_expression = e;
+ if (m_expression) m_expression->setNotifyOnValueChanged(false);
+ return rv;
+}
+
+QDeclarativeBoundSignal *QDeclarativeBoundSignal::cast(QObject *o)
+{
+ QDeclarativeAbstractBoundSignal *s = qobject_cast<QDeclarativeAbstractBoundSignal*>(o);
+ return static_cast<QDeclarativeBoundSignal *>(s);
+}
+
+int QDeclarativeBoundSignal::qt_metacall(QMetaObject::Call c, int id, void **a)
+{
+ if (c == QMetaObject::InvokeMetaMethod && id == evaluateIdx) {
+ m_isEvaluating = true;
+ if (!m_paramsValid) {
+ if (!m_signal.parameterTypes().isEmpty())
+ m_params = new QDeclarativeBoundSignalParameters(m_signal, this);
+ m_paramsValid = true;
+ }
+
+ if (m_params) m_params->setValues(a);
+ if (m_expression && m_expression->engine()) {
+ QDeclarativeExpressionPrivate::get(m_expression)->value(m_params);
+ if (m_expression && m_expression->hasError())
+ QDeclarativeEnginePrivate::warning(m_expression->engine(), m_expression->error());
+ }
+ if (m_params) m_params->clearValues();
+ m_isEvaluating = false;
+ return -1;
+ } else {
+ return QObject::qt_metacall(c, id, a);
+ }
+}
+
+QDeclarativeBoundSignalParameters::QDeclarativeBoundSignalParameters(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(&QDeclarativeBoundSignalParameters::staticMetaObject);
+ mob.setClassName("QDeclarativeBoundSignalParameters");
+
+ 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 (QDeclarativeMetaType::isQObject(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;
+}
+
+QDeclarativeBoundSignalParameters::~QDeclarativeBoundSignalParameters()
+{
+ delete [] types;
+ qFree(myMetaObject);
+}
+
+void QDeclarativeBoundSignalParameters::setValues(void **v)
+{
+ values = v;
+}
+
+void QDeclarativeBoundSignalParameters::clearValues()
+{
+ values = 0;
+}
+
+int QDeclarativeBoundSignalParameters::metaCall(QMetaObject::Call c, int id, void **a)
+{
+ if (!values)
+ return -1;
+
+ if (c == QMetaObject::ReadProperty && id >= 1) {
+ QDeclarativeMetaType::copy(types[id - 1], a[0], values[id]);
+ return -1;
+ } else {
+ return qt_metacall(c, id, a);
+ }
+}
+
+QT_END_NAMESPACE
+
+#include <qdeclarativeboundsignal.moc>