Class MCoeMessageObserver

MCoeMessageObserver

Support

Supported from 6.0

Description

Interface for handling incoming window server messages.

This interface is used to enable FEPs to keep their settings synchronised across all running instances.

Writing derived classes:

Anything that needs to be notified of messages that get sent by the window-server's message-sending service should derive from this class and override its pure virtual function.

In addition, derived classes also need to call CCoeEnv::AddMessageObserverL() during construction and CCoeEnv::RemoveMessageObserver() in their destructors.

Defined in MCoeMessageObserver:
EMessageHandled, EMessageNotHandled, HandleMessageL(), TMessageResponse

virtual TMessageResponse HandleMessageL(TUint32 aClientHandleOfTargetWindowGroup, TUid aMessageUid, const TDesC8& aMessageParameters)=0;

Description

Handles window server messages.

Implementations should return EMessageHandled if they are able to handle the message, or EMessageNotHandled if the message is not appropriate to this observer.

Parameters

TUint32 aClientHandleOfTargetWindowGroup The window group that the message was sent to. Many implementations will not need this information. TUid aMessageUid The message UID. const TDesC8& aMessageParameters The message parameters.

Return value

TMessageResponse The message response — the message was either handled or not handled by the function.

TMessageResponse

Description

Message response flags.

EMessageNotHandled Message not handled. EMessageHandled Message handled.