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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 |