CLbtTriggerFiringEventNotifier Class Reference

class CLbtTriggerFiringEventNotifier : public CActive

Helper class to receive trigger firing event through observer interface.


S60 5.1

Inherits from

Constructor & Destructor Documentation

CLbtTriggerFiringEventNotifier(RLbt &, MLbtTriggerFiringEventObserver &, TInt)

CLbtTriggerFiringEventNotifier(RLbt &aLbt,
MLbtTriggerFiringEventObserver &aObserver,
TIntaPriority = CActive::EPriorityStandard

Default constructor


RLbt & aLbt
MLbtTriggerFiringEventObserver & aObserver
TInt aPriority = CActive::EPriorityStandard




If the notification is started, the destructor will cancel the notification.

Member Functions Documentation



Second phase constructor


voidDoCancel()[private, virtual]

Implements cancellation of an outstanding request.

This function is called as part of the active object's Cancel().

It must call the appropriate cancel function offered by the active object's asynchronous service provider. The asynchronous service provider's cancel is expected to act immediately.

DoCancel() must not wait for event completion; this is handled by Cancel().


NewL(RLbt &, MLbtTriggerFiringEventObserver &, TInt)

IMPORT_C CLbtTriggerFiringEventNotifier *NewL(RLbt &aLbt,
MLbtTriggerFiringEventObserver &aObserver,
TIntaPriority = CActive::EPriorityStandard

Construct a trigger firing event notifier object.

When the object is constructed. The trigger firing event notification request is not issued to the Location Triggering Server. Client shall call CLbtTriggerFiringEventNotifier::Start() to start notification.

LocTriggering ELbtServerBadHandle If the subsession of aLbt is not opened.


RLbt & aLbtA referece to RLbt object. The subsession must be opened. Otherwise a panic is raised.
MLbtTriggerFiringEventObserver & aObserverA referece to the observer object to receive trigger firing event.
TInt aPriority = CActive::EPriorityStandardAn integer specifying the priority of this active object. CActive::TPriority defines a standard set of priorities.


TInt RunError(TIntaError)[private, virtual]


TInt aError


voidRunL()[private, virtual]

Handles an active object's request completion event.

A derived class must provide an implementation to handle the completed request. If appropriate, it may issue another request.

The function is called by the active scheduler when a request completion event occurs, i.e. after the active scheduler's WaitForAnyRequest() function completes.

Before calling this active object's RunL() function, the active scheduler has:

1. decided that this is the highest priority active object with a completed request

2. marked this active object's request as complete (i.e. the request is no longer outstanding)

RunL() runs under a trap harness in the active scheduler. If it leaves, then the active scheduler calls RunError() to handle the leave.

Note that once the active scheduler's Start() function has been called, all user code is run under one of the program's active object's RunL() or RunError() functions.

CActiveScheduler::Start CActiveScheduler::Error CActiveScheduler::WaitForAnyRequest TRAPD


IMPORT_C voidStart()

Start trigger firing event notification.

After this function is called, when a trigger is fired, the client will be notified from the observer interface.

Client shall call Cancel() function to stop the trigger firing event notification.

Member Data Documentation

TLbtTriggerFireInfo iFiringEvent

TLbtTriggerFireInfo iFiringEvent[private]

Trigger fire info

RLbt & iLbt

RLbt &iLbt[private]

Reference to Lbt subsession.

MLbtTriggerFiringEventObserver & iObserver

MLbtTriggerFiringEventObserver &iObserver[private]

Reference to trigger fire event observer