MSensrvChannelListener Class Reference

#include <sensrvchannellistener.h>

class MSensrvChannelListener

Public Member Functions
pure virtual void	ChannelChangeDetected(const TSensrvChannelInfo &, TSensrvChannelChangeType)
pure virtual void	ChannelDetectionError(CSensrvChannelFinder &, TSensrvErrorSeverity)
pure virtual void	GetChannelListenerInterfaceL(TUid, TAny *&)

Detailed Description

Channel listener callback interface to indicate when channels have been added or removed.

This class is for use with the CSensrvChannelFinder::SetChannelListenerL() method. Clients wishing to find channels must inherit from this class and provide a reference to an instance of it in CSensrvChannelFinder::SetChannelListenerL().

library: sensrvclient.lib

Since: S60 5.0

Member Function Documentation

ChannelChangeDetected ( const TSensrvChannelInfo &, TSensrvChannelChangeType )

void	ChannelChangeDetected	(	const TSensrvChannelInfo &	aDetectedChannel,
			TSensrvChannelChangeType	aChangeType
		)	[pure virtual]

Callback implemented by a client so that they can be notified when channels are added or removed from the system when new software is installed or uninstalled.

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.

Since: S60 5.0

Parameter	Description
aDetectedChannel	Information for the channel that has been added or removed
aChangeType	If ESensrvChannelAdded, channel is a newly available channel. If ESensrvChannelRemoved, channel has been removed and is no longer available.

ChannelDetectionError ( CSensrvChannelFinder &, TSensrvErrorSeverity )

void	ChannelDetectionError	(	CSensrvChannelFinder &	aChannelFinder,
			TSensrvErrorSeverity	aError
		)	[pure virtual]

Callback implemented by a client so that they can be notified when channel listening has failed. If the error is fatal the sensor server session has been terminated and the channel finder is no longer useable. If the error is minor some notifications have potentially been lost, 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.

Since: S60 5.0

Parameter	Description
aChannelFinder	Reference to the related channelfinder object
aError	The error severity

GetChannelListenerInterfaceL ( TUid, TAny *& )

void	GetChannelListenerInterfaceL	(	TUid	aInterfaceUid,
			TAny *&	aInterface
		)	[pure virtual]

Callback to future proof this API so that additional callbacks can be added in the future without breaking binary compatibility.

Since: S60 5.0

leave: One of the system-wide error codes

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.