PropertyChanged Event Datatypes

OcaPropertyChangeType

enum OcaPropertyChangeType : uint8_t

Enum describing property change type.

enumerator CurrentChanged = 1

Current value has changed.

enumerator MinChanged = 2

Minimum value has changed. Note that datatypes of min and max may not be the same as the datatype of the current value.

enumerator MaxChanged = 3

Maximum value has changed. Note that datatypes of min and max may not be the same as the datatype of the current value.

enumerator ItemAdded = 4

One or more items of a list, map, or multimap property have been added. PropertyValue field of event data contains the entire property value.

enumerator ItemChanged = 5

One or more items of a list, map, or multimap property have been changed. PropertyValue field of event data contains the entire property value.

enumerator ItemDeleted = 6

One or more items of a list, map, or multimap property have been deleted. PropertyValue field of event data contains the entire property value.

OcaPropertyChangedEventData

struct OcaPropertyChangedEventData

Template class that defines the event data parameter for events that return property values, such as the PropertyChanged event defined in OcaRoot, and the PeriodicObservation event define in OcaNumericObserver. The template parameter is the datatype of the affected property.

OcaPropertyID PropertyID

The property ID of the property that has changed.

variant PropertyValue

The new, changed, or deleted data. - “Affected property” means a property whose addition, change, or deletion has raised this event. - “Affected item” means an added, changed, or deleted member of an affected collection property. - “DT” is the template parameter DT:datatype. The datatype of this property shall be DT, except when the value of ChangeType is ItemAdded2, ItemChanged2, or ItemDeleted2 and the affected property is an OcaList, in which case the variant type shall be OcaMap<OcaUint16,DT>, and the value(s) of the map key(s) shall be the list index value(s) of the affected item(s). The value of this property shall be the entire value of the affected property, except when the value of ChangeType is ItemAdded2, ItemChanged2, or ItemDeleted2, in which case the value shall consist of only the affected item(s).

OcaPropertyChangeType ChangeType

Type of change : Current value, Min, Max, Item changed, Item added, Item deleted