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** Copyright (C) 2015 The Qt Company Ltd.
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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
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