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/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtScxml module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:COMM$
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** $QT_END_LICENSE$
**
**
**
**
**
**
**
**
**
**
**
**
**
**
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**
**
**
****************************************************************************/
#include "eventconnection_p.h"
QT_BEGIN_NAMESPACE
/*!
\qmltype EventConnection
\instantiates QScxmlEventConnection
\inqmlmodule QtScxml
\since QtScxml 5.8
\brief Connects to events sent out by state machines.
To receive a notification when a state machine sends out an event, a
connection can be created to the corresponding signal.
*/
/*!
\qmlproperty stringlist EventConnection::events
The list of SCXML event specifiers that describe the events to listen for.
Even though spaces are allowed in event specifications in SCXML documents,
they are not allowed in this list. However, the list can contain multiple
specifiers, to the same effect.
*/
/*!
\qmlproperty ScxmlStateMachine EventConnection::stateMachine
The state machine that sends out the event.
*/
/*!
\qmlsignal EventConnection::occurred(event)
This signal is emitted when the event \a event occurrs.
The corresponding signal handler is \c onOccurred.
\sa QScxmlEvent
*/
QScxmlEventConnection::QScxmlEventConnection(QObject *parent) :
QObject(parent), m_stateMachine(nullptr)
{
}
QStringList QScxmlEventConnection::events() const
{
return m_events;
}
void QScxmlEventConnection::setEvents(const QStringList &events)
{
if (events != m_events) {
m_events = events;
doConnect();
emit eventsChanged();
}
}
QScxmlStateMachine *QScxmlEventConnection::stateMachine() const
{
return m_stateMachine;
}
void QScxmlEventConnection::setStateMachine(QScxmlStateMachine *stateMachine)
{
if (stateMachine != m_stateMachine) {
m_stateMachine = stateMachine;
doConnect();
emit stateMachineChanged();
}
}
void QScxmlEventConnection::doConnect()
{
for (const QMetaObject::Connection &connection : qAsConst(m_connections))
disconnect(connection);
m_connections.clear();
if (m_stateMachine) {
for (const QString &event : qAsConst(m_events)) {
m_connections.append(m_stateMachine->connectToEvent(event, this,
&QScxmlEventConnection::occurred));
}
}
}
void QScxmlEventConnection::classBegin()
{
}
void QScxmlEventConnection::componentComplete()
{
if (!m_stateMachine) {
if ((m_stateMachine = qobject_cast<QScxmlStateMachine *>(parent())))
doConnect();
}
}
QT_END_NAMESPACE
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