Class MCoeMessageObserver

class MCoeMessageObserver;

Description

Interface for handling incoming window server messages.

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

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(MCoeMessageObserver &) during construction and CCoeEnv::RemoveMessageObserver(MCoeMessageObserver &) in their destructors.

Members

Defined in MCoeMessageObserver:

• EMessageHandledMessage handled.
• EMessageNotHandledMessage not handled.
• HandleMessageL(TUint32,TUid,const TDesC8 &)Handles window server messages.
• MCoeMessageObserver()
• MCoeMessageObserver_Reserved_1()
• MCoeMessageObserver_Reserved_2()
• TMessageResponseMessage response flags.

protected: IMPORT_C MCoeMessageObserver();

Description

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

MCoeMessageObserver::TMessageResponse Indicates whether the message was handled or not handled by the function.

private: IMPORT_C virtual void MCoeMessageObserver_Reserved_1();

Description

private: IMPORT_C virtual void MCoeMessageObserver_Reserved_2();

Description

TMessageResponse

Description

Message response flags.

EMessageNotHandled Message not handled. EMessageHandled Message handled.