#include <sensrvpropertylistener.h>
| class MSensrvPropertyListener |
| Public Member Functions | |
|---|---|
| pure virtual void | GetPropertyListenerInterfaceL(TUid, TAny *&) |
| pure virtual void | PropertyChanged(CSensrvChannel &, const TSensrvProperty &) |
| pure virtual void | PropertyError(CSensrvChannel &, TSensrvErrorSeverity) |
| pure virtual void | SetPropertySuccessIndicationChanged(TSetPropertySuccessIndicator) |
Property listener callback interface to indicate when a property has changed or when clients access to setting properties has changed.
This class is for use with the CSensrvChannel::SetPropertyListenerL() method. Clients wishing to use property listening must inherit from this class and provide a reference to an instance of it in CSensrvChannel::SetPropertyListenerL().
See also: CSensrvChannel::SetPropertyListenerL()
Callback to future proof this API so that additional callbacks can be added in the future without breaking binary compatibility.
| Parameter | Description |
|---|---|
| aInterfaceUid | Identifier for the interface to be retrieved |
| aInterface | A reference to a pointer for the specified interface. Implementation sets aInterface to a valid pointer if the M-class identified by aInterfaceUid is supported, otherwise it is set to NULL on exit. |
| void | PropertyChanged | ( | CSensrvChannel & | aChannel, |
| const TSensrvProperty & | aChangedProperty | |||
| ) | [pure virtual] | |||
Callback implemented by a client so that they can be notified when the value of a property has changed. The client that set the property will not be notified.
Clients providing an implementation for this callback must ensure that the operation does not leave. If a leave does occur then the behaviour is undefined.
| Parameter | Description |
|---|---|
| aChannel | Channel associated with the listener |
| aChangedProperty | The property that has changed |
| void | PropertyError | ( | CSensrvChannel & | aChannel, |
| TSensrvErrorSeverity | aError | |||
| ) | [pure virtual] | |||
Callback implemented by a client so that they can be notified when property listening has failed. If the error is fatal the channel will be closed, the sensor server session has been terminated and the channel object is no longer useable. If the error is minor, some property changes have potentially been missed, however listening is still active.
Clients providing an implementation for this callback must ensure that the operation does not leave. If a leave does occur then the behaviour is undefined.
| Parameter | Description |
|---|---|
| aChannel | Channel associated with the listener |
| aError | The error severity |
| void | SetPropertySuccessIndicationChanged | ( | TSetPropertySuccessIndicator | aIndication | ) | [pure virtual] |
Callback implemented by a client so that they can be notified when the clients access for setting properties has changed.
Clients providing an implementation for this callback must ensure that the operation does not leave. If a leave does occur then the behaviour is undefined.
| Parameter | Description |
|---|---|
| aIndication | Indication of the clients access for setting of properties |