QOpcUaHistoryEvent Class
This class stores historical events from a node. More...
| Header: | #include <QOpcUaHistoryEvent> |
| CMake: | find_package(Qt6 REQUIRED COMPONENTS OpcUa) target_link_libraries(mytarget PRIVATE Qt6::OpcUa) |
| qmake: | QT += opcua |
| Since: | Qt 6.7 |
Public Functions
| QOpcUaHistoryEvent() | |
| QOpcUaHistoryEvent(const QString &nodeId) | |
| QOpcUaHistoryEvent(const QOpcUaHistoryEvent &other) | |
| QOpcUaHistoryEvent(QOpcUaHistoryEvent &&other) | |
| ~QOpcUaHistoryEvent() | |
| void | addEvent(const QVariantList &value) |
| int | count() const |
| QList<QVariantList> | events() const |
| QString | nodeId() const |
| void | setNodeId(const QString &nodeId) |
| void | setStatusCode(QOpcUa::UaStatusCode statusCode) |
| QOpcUa::UaStatusCode | statusCode() const |
| void | swap(QOpcUaHistoryEvent &other) |
| QOpcUaHistoryEvent & | operator=(QOpcUaHistoryEvent &&other) |
| QOpcUaHistoryEvent & | operator=(const QOpcUaHistoryEvent &other) |
Related Non-Members
| bool | operator!=(const QOpcUaHistoryEvent &lhs, const QOpcUaHistoryEvent &rhs) |
| bool | operator==(const QOpcUaHistoryEvent &lhs, const QOpcUaHistoryEvent &rhs) |
Detailed Description
When a request to read history events is being handled, instances of this class are used to store information about which node has been read, its events and the status code. The finished signal of a history read response will return a list of QOpcUaHistoryEvent objects which can be parsed to review the results of the request.
Member Function Documentation
QOpcUaHistoryEvent::QOpcUaHistoryEvent()
Constructs an invalid history event item.
[explicit] QOpcUaHistoryEvent::QOpcUaHistoryEvent(const QString &nodeId)
Constructs a history event item and stores which node it corresponds to.
QOpcUaHistoryEvent::QOpcUaHistoryEvent(const QOpcUaHistoryEvent &other)
Constructs a history event item from other.
[noexcept] QOpcUaHistoryEvent::QOpcUaHistoryEvent(QOpcUaHistoryEvent &&other)
Move-constructs a new history event object from other.
Note: The moved-from object other is placed in a partially-formed state, in which the only valid operations are destruction and assignment of a new value.
[noexcept] QOpcUaHistoryEvent::~QOpcUaHistoryEvent()
Destroys the history event item.
void QOpcUaHistoryEvent::addEvent(const QVariantList &value)
Adds an event field list given by value.
int QOpcUaHistoryEvent::count() const
Returns the number of available events.
QList<QVariantList> QOpcUaHistoryEvent::events() const
Returns the list of QVariantList objects which contain the results of the history read request.
QString QOpcUaHistoryEvent::nodeId() const
Returns the nodeId of the node whose events have been stored.
See also setNodeId().
void QOpcUaHistoryEvent::setNodeId(const QString &nodeId)
Sets the nodeId to nodeId.
See also nodeId().
void QOpcUaHistoryEvent::setStatusCode(QOpcUa::UaStatusCode statusCode)
Sets the status code to statusCode.
See also statusCode().
QOpcUa::UaStatusCode QOpcUaHistoryEvent::statusCode() const
Returns the status code which indicates if an error occurred while fetching the history events.
See also setStatusCode().
[noexcept] void QOpcUaHistoryEvent::swap(QOpcUaHistoryEvent &other)
Swaps history event object other with this history event object. This operation is very fast and never fails.
[noexcept] QOpcUaHistoryEvent &QOpcUaHistoryEvent::operator=(QOpcUaHistoryEvent &&other)
Move-assigns other to this QOpcUaHistoryEvent instance.
Note: The moved-from object other is placed in a partially-formed state, in which the only valid operations are destruction and assignment of a new value.
QOpcUaHistoryEvent &QOpcUaHistoryEvent::operator=(const QOpcUaHistoryEvent &other)
Sets the values from other in this history event item.
Related Non-Members
[noexcept] bool operator!=(const QOpcUaHistoryEvent &lhs, const QOpcUaHistoryEvent &rhs)
Returns true if lhs is not equal to rhs.
[noexcept] bool operator==(const QOpcUaHistoryEvent &lhs, const QOpcUaHistoryEvent &rhs)
Returns true if rhs and lhs contain the same values.
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