C++ qstatemachine::SignalEvent类代码示例

bool ReceivedMessageTransition::eventTest(QEvent* event) {
    if (!QSignalTransition::eventTest(event)) {
        return false;
    }

    QStateMachine::SignalEvent* signalEvent = static_cast<QStateMachine::SignalEvent*>(event);
    const QVariant& qVariant(signalEvent->arguments().at(0));
    if (!qVariant.canConvert<AddressedMessage>()) {
        LOG(ERROR) << "ReceivedMessageTransition::eventTest(): "
                   << "cannot convert to AddressedMessage...";
        return false;
    }

    const AddressedMessage& message = qVariant.value<AddressedMessage>();

    if (message.getMessage().getMessageNumber() == expectedMessageNumber) {
        return true;
    } else {
        LOG(ERROR) << "ReceivedMessageTransition::eventTest(): "
                   << "recevied wrong message number: " << message.getMessage().getMessageNumber()
                   << ", expected: " << expectedMessageNumber;
        return false;
    }

}

bool SignalTransition::eventTest(QEvent *event)
{
    Q_ASSERT(event);
    if (!QSignalTransition::eventTest(event))
        return false;

    if (m_guard.isEmpty())
        return true;

    QQmlContext *outerContext = QQmlEngine::contextForObject(this);
    QQmlContext context(outerContext);
    QQmlContextData::get(outerContext)->imports->addref();
    QQmlContextData::get(&context)->imports = QQmlContextData::get(outerContext)->imports;

    QStateMachine::SignalEvent *e = static_cast<QStateMachine::SignalEvent*>(event);

    // Set arguments as context properties
    int count = e->arguments().count();
    QMetaMethod metaMethod = e->sender()->metaObject()->method(e->signalIndex());
    for (int i = 0; i < count; i++)
        context.setContextProperty(metaMethod.parameterNames()[i], QVariant::fromValue(e->arguments().at(i)));

    QQmlExpression expr(m_guard, &context, this);
    QVariant result = expr.evaluate();

    return result.toBool();
}

void SignalTransition::onTransition(QEvent *event)
{
    if (m_signalExpression) {
        QStateMachine::SignalEvent *e = static_cast<QStateMachine::SignalEvent*>(event);
        m_signalExpression->evaluate(e->arguments());
    }
    QSignalTransition::onTransition(event);
}

//virtual
void PropertySettingSignalTransition::onTransition(QEvent * e)
{
	if (m_qp_targetObject)
	{
		QStateMachine::SignalEvent *se = static_cast<QStateMachine::SignalEvent*>(e);
		if (!se->arguments().isEmpty())
		{
            m_qp_targetObject->setProperty(m_propertyName.toLatin1().constData(),se->arguments().at(0));
        }
	}
	QSignalTransition::onTransition(e);
}

/*!
  \reimp

  The default implementation returns true if the \a event is a
  QStateMachine::SignalEvent object and the event's sender and signal index
  match this transition, and returns false otherwise.
*/
bool QSignalTransition::eventTest(QEvent *event)
{
    Q_D(const QSignalTransition);
    if (event->type() == QEvent::StateMachineSignal) {
        if (d->signalIndex == -1)
            return false;
        QStateMachine::SignalEvent *se = static_cast<QStateMachine::SignalEvent*>(event);
        return (se->sender() == d->sender)
            && (se->signalIndex() == d->signalIndex);
    }
    return false;
}

void ReorderState::onEntry(QEvent* event)
{
	CardWindowManagerState::onEntry(event);

	QStateMachine::SignalEvent* se = static_cast<QStateMachine::SignalEvent*>(event);
	if (se && !se->arguments().isEmpty()) {
		QPoint pt = se->arguments().at(0).toPoint();		
		m_wm->enterReorder(pt);
		//int slice = se->arguments().at(1).toInt();
		//m_grid = new ReorderGrid(m_wm, slice);
	}

	SystemUiController::instance()->enterOrExitCardReorder(true);
}

void ReorderState::onExit(QEvent* event)
{
	CardWindowManagerState::onExit(event);

	QStateMachine::SignalEvent* se = static_cast<QStateMachine::SignalEvent*>(event);
	if (se && !se->arguments().isEmpty()) {
		bool canceled = se->arguments().at(0).toBool();
		if (canceled)
			m_wm->cancelReorder();
	}

	//delete m_grid;
	SystemUiController::instance()->enterOrExitCardReorder(false);
}

bool MaximizeToFocusTransition::eventTest(QEvent* event)
{
	if (!QSignalTransition::eventTest(event))
		return false;

	QStateMachine::SignalEvent* se = static_cast<QStateMachine::SignalEvent*>(event);
	CardWindow* win = se->arguments().at(0).value<CardWindow*>();
	CardWindowManager* wm = static_cast<CardWindowManager*>(senderObject());
	if (win == wm->activeWindow()) {
		// window is already focused
		SystemUiController::instance()->setCardWindowMaximized(true);
		return false;
	}

	return true;
}

static PyObject *meth_QStateMachine_SignalEvent_sender(PyObject *sipSelf, PyObject *sipArgs)
{
    PyObject *sipParseErr = NULL;

    {
        QStateMachine::SignalEvent *sipCpp;

        if (sipParseArgs(&sipParseErr, sipArgs, "B", &sipSelf, sipType_QStateMachine_SignalEvent, &sipCpp))
        {
            QObject *sipRes;

            Py_BEGIN_ALLOW_THREADS
            sipRes = sipCpp->sender();
            Py_END_ALLOW_THREADS

            return sipConvertFromType(sipRes,sipType_QObject,NULL);
        }
    }