Symbian^3 Application Developer Library >

CSsmPropertyObserver Class Reference

class CSsmPropertyObserver : public CActive

Provide an abstract class for observing RProperty value changes from the SSM Utility Server.

Inherits from

Public Member Functions
CSsmPropertyObserver ( TUid , TUint )
IMPORT_C void InitializeL ()
TBool PropertyChangedL ( TInt )
IMPORT_C void Release ()
IMPORT_C void StartL ()
Protected Member Functions
~CSsmPropertyObserver ()
IMPORT_C void DoCancel ()
IMPORT_C TInt RunError ( TInt )
IMPORT_C void RunL ()
void doRunL ()
Inherited Functions
CActive::CActive(TInt)
CActive::Cancel()
CActive::Deque()
CActive::Extension_(TUint,TAny *&,TAny *)
CActive::IsActive()const
CActive::IsAdded()const
CActive::Priority()const
CActive::SetActive()
CActive::SetPriority(TInt)
CActive::~CActive()
CBase::CBase()
CBase::Delete(CBase *)
CBase::operator new(TUint)
CBase::operator new(TUint,TAny *)
CBase::operator new(TUint,TLeave)
CBase::operator new(TUint,TLeave,TUint)
CBase::operator new(TUint,TUint)
CBase::~CBase()
Inherited Enumerations
CActive:TPriority
Protected Attributes
const TUid iCategory
const TUint iKey
RProperty iProperty
TInt iReserved
Inherited Attributes
CActive::iStatus

Constructor & Destructor Documentation

CSsmPropertyObserver(TUid, TUint)

IMPORT_C CSsmPropertyObserver ( TUid aCategory,
TUint aKey
)

Creates a new CSsmProperty Observer.

Parameters

TUid aCategory The category of the property to monitor.
TUint aKey The key of the property to monitor.

~CSsmPropertyObserver()

IMPORT_C ~CSsmPropertyObserver ( ) [protected, virtual]

Releases any resources allocated to this object.

Member Functions Documentation

DoCancel()

IMPORT_C void DoCancel ( ) [protected, virtual]

Cancels monitoring for this property

InitializeL()

IMPORT_C void InitializeL ( ) [virtual]

Initialises this object but does not start responding to changes to the monitored property.

PropertyChangedL(TInt)

TBool PropertyChangedL ( TInt aValue ) [pure virtual]

Function that is called everytime the property for this observer changes.

This is also called once when the observation is first started using StartL() .

Note:

If EFalse is returned from this object then this object is not destroyed.

Parameters

TInt aValue The new value for the observed property.

Release()

IMPORT_C void Release ( ) [virtual]

Releases this object freeing any resources allocated to it.

Using this object after calling release will have undefined behaviour.

RunError(TInt)

IMPORT_C TInt RunError ( TInt aError ) [protected, virtual]

CActive::RunError implementation

Parameters

TInt aError

RunL()

IMPORT_C void RunL ( ) [protected, virtual]

CActive::RunL implementation to call the observer function and to re-request monitoring.

StartL()

IMPORT_C void StartL ( ) [virtual]

Starts this observer responding to the monitored property.

doRunL()

void doRunL ( ) [protected]

Internal RunL helper method

Member Data Documentation

const TUid iCategory

const TUid iCategory [protected]

const TUint iKey

const TUint iKey [protected]

RProperty iProperty

RProperty iProperty [protected]

TInt iReserved

TInt iReserved [protected]

Copyright ©2010 Nokia Corporation and/or its subsidiary(-ies).
All rights reserved. Unless otherwise stated, these materials are provided under the terms of the Eclipse Public License v1.0.