1 files changed, 264 insertions, 0 deletions
diff --git a/src/declarative/qml/qmlboundsignal.cpp b/src/declarative/qml/qmlboundsignal.cpp
new file mode 100644
index 0000000..d42e7ba
--- /dev/null
+++ b/src/declarative/qml/qmlboundsignal.cpp
@@ -0,0 +1,264 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 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 "qmlboundsignal_p.h"
+
+#include "qmetaobjectbuilder_p.h"
+#include "qmlengine_p.h"
+#include "qmlexpression_p.h"
+#include "qmlcontext_p.h"
+#include "qmlmetatype.h"
+#include "qml.h"
+#include "qmlcontext.h"
+#include "qmlglobal_p.h"
+
+#include <QtCore/qdebug.h>
+
+QT_BEGIN_NAMESPACE
+
+class QmlBoundSignalParameters : public QObject
+{
+Q_OBJECT
+public:
+    QmlBoundSignalParameters(const QMetaMethod &, QObject * = 0);
+    ~QmlBoundSignalParameters();
+
+    void setValues(void **);
+    void clearValues();
+
+private:
+    friend class MetaObject;
+    int metaCall(QMetaObject::Call, int _id, void **);
+    struct MetaObject : public QAbstractDynamicMetaObject {
+        MetaObject(QmlBoundSignalParameters *b)
+            : parent(b) {}
+
+        int metaCall(QMetaObject::Call c, int id, void **a) { 
+            return parent->metaCall(c, id, a);
+        }
+        QmlBoundSignalParameters *parent;
+    };
+
+    int *types;
+    void **values;
+    QMetaObject *myMetaObject;
+};
+
+static int evaluateIdx = -1;
+
+QmlAbstractBoundSignal::QmlAbstractBoundSignal(QObject *parent)
+: QObject(parent)
+{
+}
+
+QmlAbstractBoundSignal::~QmlAbstractBoundSignal()
+{
+}
+
+QmlBoundSignal::QmlBoundSignal(QObject *scope, const QMetaMethod &signal, 
+                               QObject *parent)
+: m_expression(0), m_signal(signal), m_paramsValid(false), m_params(0)
+{
+    // A cached evaluation of the QmlExpression::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 = metaObject()->methodCount();
+
+    QmlGraphics_setParent_noEvent(this, parent);
+    QMetaObject::connect(scope, m_signal.methodIndex(), this, evaluateIdx);
+}
+
+QmlBoundSignal::QmlBoundSignal(QmlContext *ctxt, const QString &val, 
+                               QObject *scope, const QMetaMethod &signal,
+                               QObject *parent)
+: m_expression(0), m_signal(signal), m_paramsValid(false), m_params(0)
+{
+    // A cached evaluation of the QmlExpression::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 = metaObject()->methodCount();
+
+    QmlGraphics_setParent_noEvent(this, parent);
+    QMetaObject::connect(scope, m_signal.methodIndex(), this, evaluateIdx);
+
+    m_expression = new QmlExpression(ctxt, val, scope);
+    m_expression->setTrackChange(false);
+}
+
+QmlBoundSignal::~QmlBoundSignal()
+{
+    delete m_expression;
+    m_expression = 0;
+}
+
+int QmlBoundSignal::index() const 
+{ 
+    return m_signal.methodIndex();
+}
+
+/*!
+    Returns the signal expression.
+*/
+QmlExpression *QmlBoundSignal::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 QmlBoundSignal instance takes ownership of \a e.  The caller is 
+    assumes ownership of the returned QmlExpression.
+*/
+QmlExpression *QmlBoundSignal::setExpression(QmlExpression *e)
+{
+    QmlExpression *rv = m_expression;
+    m_expression = e;
+    if (m_expression) m_expression->setTrackChange(false);
+    return rv;
+}
+
+QmlBoundSignal *QmlBoundSignal::cast(QObject *o)
+{
+    QmlAbstractBoundSignal *s = qobject_cast<QmlAbstractBoundSignal*>(o);
+    return static_cast<QmlBoundSignal *>(s);
+}
+
+int QmlBoundSignal::qt_metacall(QMetaObject::Call c, int id, void **a)
+{
+    if (c == QMetaObject::InvokeMetaMethod && id == evaluateIdx) {
+        if (!m_paramsValid) {
+            if (!m_signal.parameterTypes().isEmpty())
+                m_params = new QmlBoundSignalParameters(m_signal, this);
+            m_paramsValid = true;
+        }
+
+        if (m_params) m_params->setValues(a);
+        if (m_expression) {
+            QmlExpressionPrivate::get(m_expression)->value(m_params);
+            if (m_expression && m_expression->hasError())
+                qWarning().nospace() << qPrintable(m_expression->error().toString());
+        }
+        if (m_params) m_params->clearValues();
+        return -1;
+    } else {
+        return QObject::qt_metacall(c, id, a);
+    }
+}
+
+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);
+    mob.setClassName("QmlBoundSignalParameters");
+
+    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::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;
+}
+
+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 (!values)
+        return -1;
+
+    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
+
+#include <qmlboundsignal.moc>