DataChangeFilter Class
class QOpcUaMonitoringParameters::DataChangeFilterDefines a DataChangeFilter for a monitored item. More...
Public Types
| enum class | DataChangeTrigger { Status, StatusOrValue, StatusOrValueOrTimestamp } |
| enum class | DeadbandType { None, Absolute, Percent } |
Public Functions
| DataChangeFilter(DataChangeFilter::DataChangeTrigger trigger, DataChangeFilter::DeadbandType deadbandType, double deadbandValue) | |
| DataChangeFilter(const DataChangeFilter &rhs) | |
| DataChangeFilter() | |
| DataChangeFilter & | operator=(const DataChangeFilter &rhs) |
| DataChangeFilter::DeadbandType | deadbandType() const |
| double | deadbandValue() const |
| void | setDeadbandType(DataChangeFilter::DeadbandType deadbandType) |
| void | setDeadbandValue(double deadbandValue) |
| void | setTrigger(DataChangeFilter::DataChangeTrigger trigger) |
| DataChangeFilter::DataChangeTrigger | trigger() const |
| QVariant | operator QVariant() const |
| bool | operator==(const DataChangeFilter &rhs) const |
Detailed Description
This class is used to set up filtering for a DataChange monitored item. It is defined in OPC-UA part 4, 7.12.2.
Member Type Documentation
enum class DataChangeFilter::DataChangeTrigger
Enumerates the possible triggers for a DataChangeFilter.
| Constant | Value | Description |
|---|---|---|
QOpcUaMonitoringParameters::DataChangeFilter::DataChangeTrigger::Status | 0 | Triggers if the value's status code changes. |
QOpcUaMonitoringParameters::DataChangeFilter::DataChangeTrigger::StatusOrValue | 1 | Triggers if the value's status code or the value itself changes. |
QOpcUaMonitoringParameters::DataChangeFilter::DataChangeTrigger::StatusOrValueOrTimestamp | 2 | Triggers if the value's status code, the value itself or the source timestamp changes. |
enum class DataChangeFilter::DeadbandType
Enumerates the possible deadband types for a DataChangeFilter.
| Constant | Value | Description |
|---|---|---|
QOpcUaMonitoringParameters::DataChangeFilter::DeadbandType::None | 0 | No deadband filtering. |
QOpcUaMonitoringParameters::DataChangeFilter::DeadbandType::Absolute | 1 | A notification is generated if the absolute value of the difference between the last cached value and the current value is greater than the deadband value. |
QOpcUaMonitoringParameters::DataChangeFilter::DeadbandType::Percent | 2 | Only valid for AnalogItems with an EURange property. A notification is generated if the absolute value of the difference between the last cached value and the current value is greater than value percent of the EURange. |
Member Function Documentation
DataChangeFilter::DataChangeFilter(DataChangeFilter::DataChangeTrigger trigger, DataChangeFilter::DeadbandType deadbandType, double deadbandValue)
Constructs a data change filter with trigger trigger, deadband type deadbandType and deadband value deadbandValue.
DataChangeFilter::DataChangeFilter(const DataChangeFilter &rhs)
Constructs a data change filter from rhs.
DataChangeFilter::DataChangeFilter()
Constructs a data change filter with trigger on status, deadband type none and deadbandValue 0.
DataChangeFilter &DataChangeFilter::operator=(const DataChangeFilter &rhs)
Sets the values from rhs in this data change filter.
DataChangeFilter::DeadbandType DataChangeFilter::deadbandType() const
Returns the deadband type.
See also setDeadbandType().
double DataChangeFilter::deadbandValue() const
Returns the deadband value.
See also setDeadbandValue().
void DataChangeFilter::setDeadbandType(DataChangeFilter::DeadbandType deadbandType)
Sets the deadband type to deadbandType.
See also deadbandType().
void DataChangeFilter::setDeadbandValue(double deadbandValue)
Sets the deadband value to deadbandValue.
See also deadbandValue().
void DataChangeFilter::setTrigger(DataChangeFilter::DataChangeTrigger trigger)
Sets the trigger to trigger.
See also trigger().
DataChangeFilter::DataChangeTrigger DataChangeFilter::trigger() const
Returns the trigger.
See also setTrigger().
QVariant DataChangeFilter::operator QVariant() const
Converts this data change filter to QVariant.
bool DataChangeFilter::operator==(const DataChangeFilter &rhs) const
Returns true if this data change filter has the same value as rhs.
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