// Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).

 // All rights reserved.

 // This component and the accompanying materials are made available

 // under the terms of the License "Symbian Foundation License v1.0" to Symbian Foundation members and "Symbian Foundation End User License Agreement v1.0" to non-members

 // which accompanies this distribution, and is available

 // at the URL "http://www.symbianfoundation.org/legal/licencesv10.html".

 //

 // Initial Contributors:

 // Nokia Corporation - initial contribution.

 //

 // Contributors:

 //

 // Description:

 //

 #ifndef __EIKCMOBS_H__

 #define __EIKCMOBS_H__

 #include <e32def.h>

 class CCoeControl;

 /** Command observers respond to user commands, and have the secondary function 

 of creating custom controls on request for classes such as CEikToolbar, or 

 user-defined classes.

 An implementation of the pure virtual function ProcessCommandL() must be provided 

 for each concrete class derived from MEikCommandObserver. CreateCustomCommandControlL() 

 may also be re-implemented. 

 @publishedAll 

 @released */

 class MEikCommandObserver

 	{

 public:

 	/** Processes user commands.

 	Derived classes must provide an implementation of this function which responds 

 	to user commands appropriately based on a user-defined ID for the command.

 	@param aCommandId ID of the command to respond to. */

 	virtual void ProcessCommandL(TInt aCommandId)=0;

 	/** Glue for creating custom controls.

 	This function can be called to create custom controls on request from their 

 	control ID. Custom controls are user-supplied control classes.

 	Given the ID of a custom control, this function should return a pointer to 

 	a newly-instantiated and fully constructed control. If the ID is unrecognised, 

 	NULL should be returned. The control returned will be owned by the caller.

 	@param aControlType A custom control ID. 

 	@return By default, NULL. */

 	IMPORT_C virtual CCoeControl* CreateCustomCommandControlL(TInt aControlType);

 protected:

 	IMPORT_C MEikCommandObserver();

 private:

 	IMPORT_C virtual void MEikCommandObserver_Reserved1();

 	IMPORT_C virtual void MEikCommandObserver_Reserved2();

 private:

 	TInt iMEikCommandObserver_Reserved1;

 	};

 #endif	// __EIKCMOBS_H__