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****************************************************************************/

#ifndef QSIGNALSPY_H

#define QSIGNALSPY_H

#include <QtCore/qbytearray.h>

#include <QtCore/qlist.h>

#include <QtCore/qobject.h>

#include <QtCore/qmetaobject.h>

#include <QtCore/qvariant.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Test)

class QVariant;

/* ### Qt5: change the class to use regular BC mechanisms, such that we can

 * implement things like suggested in task 160192. */

class QSignalSpy: public QObject, public QList<QList<QVariant> >

{

public:

    QSignalSpy(QObject *obj, const char *aSignal)

    {

#ifdef Q_CC_BOR

        const int memberOffset = QObject::staticMetaObject.methodCount();

#else

        static const int memberOffset = QObject::staticMetaObject.methodCount();

#endif

        Q_ASSERT(obj);

        Q_ASSERT(aSignal);

        if (((aSignal[0] - '0') & 0x03) != QSIGNAL_CODE) {

            qWarning("QSignalSpy: Not a valid signal, use the SIGNAL macro");

            return;

        }

        QByteArray ba = QMetaObject::normalizedSignature(aSignal + 1);

        const QMetaObject *mo = obj->metaObject();

        int sigIndex = mo->indexOfMethod(ba.constData());

        if (sigIndex < 0) {

            qWarning("QSignalSpy: No such signal: '%s'", ba.constData());

            return;

        }

        if (!QMetaObject::connect(obj, sigIndex, this, memberOffset,

                    Qt::DirectConnection, 0)) {

            qWarning("QSignalSpy: QMetaObject::connect returned false. Unable to connect.");

            return;

        }

        sig = ba;

        initArgs(mo->method(sigIndex));

    }

    inline bool isValid() const { return !sig.isEmpty(); }

    inline QByteArray signal() const { return sig; }

    int qt_metacall(QMetaObject::Call call, int methodId, void **a)

    {

        methodId = QObject::qt_metacall(call, methodId, a);

        if (methodId < 0)

            return methodId;

        if (call == QMetaObject::InvokeMetaMethod) {

            if (methodId == 0) {

                appendArgs(a);

            }

            --methodId;

        }

        return methodId;

    }

private:

    void initArgs(const QMetaMethod &member)

    {

        QList<QByteArray> params = member.parameterTypes();

        for (int i = 0; i < params.count(); ++i) {

            int tp = QMetaType::type(params.at(i).constData());

            if (tp == QMetaType::Void)

                qWarning("Don't know how to handle '%s', use qRegisterMetaType to register it.",

                         params.at(i).constData());

            args << tp;

        }

    }

    void appendArgs(void **a)

    {

        QList<QVariant> list;

        for (int i = 0; i < args.count(); ++i) {

            QMetaType::Type type = static_cast<QMetaType::Type>(args.at(i));

            list << QVariant(type, a[i + 1]);

        }

        append(list);

    }

    // the full, normalized signal name

    QByteArray sig;

    // holds the QMetaType types for the argument list of the signal

    QList<int> args;

};

QT_END_NAMESPACE

QT_END_HEADER

#endif