/*

* Copyright (c) 2006-2007 Nokia Corporation and/or its subsidiary(-ies). 

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:    The settings model for the slideshow

 *

*/

#ifndef SHWGESTURECONTROL_H

#define SHWGESTURECONTROL_H

#include <gestureobserver.h>

#include <gesturecontrol.h>

#include "shwgestureobserver.h"

//namespace

using namespace GestureHelper;

//Forward declaration

class CAlfEnv;

class CGestureHelper;

class MGestureObserver;

class CShwSlideshowEngine;

/**

* CShwGestureControl is used to enable handling of gesture events in slide show

* Gesture support is necessary to handle swipes in "Manual Mode" 

* @ MC Photos Slideshow UI spec DeSW R8 v. 1.0.doc

* Not exposed, for internal use of Slide show

* For documentation Gesture Helper Classes ,

* see @ref MGestureObserver.

* see @ref CGestureControl

*/

NONSHARABLE_CLASS( CShwGestureControl ) : public CAlfControl, 

                     public GestureHelper::MGestureObserver

	{	

public: 

	/**

	 * NewL

	 * static function for 2-phased object creation

	 * NewLC not provided as the CShwGestureControl is primarily intended to be a

	 * member variable

	 * @param aEngine, handle to the slide show engine

	 * @param aEnv, handle to CAlfEnv 

	 * @param aDisplay, handle to CAlfDisplay

	 */ 

	 static CShwGestureControl* NewL(CAlfEnv& aEnv,CAlfDisplay& aDisplay); 

	/**

	 * HandleGestureL

	 * From MGestureObserver

	 * see @ref MGestureObserver

	 */ 

    void HandleGestureL( const GestureHelper::MGestureEvent& aEvent );

	/**

	 * ~CShwGestureControl

	 * standard C++ destructor 

	 */ 

    ~CShwGestureControl();

    /**

     * AddObserverL

     * Add an Observer 

     * @param aObserver, Observer to be added. 

     */ 

    void AddObserverL(MShwGestureObserver* aObserver); 

    /**

     * RemoveObserver

     * Remove an Observer  

     * @param aEngine, handle to the slide show engine

     */ 

    void RemoveObserver(MShwGestureObserver* aObserver);

private:

	/**

	 * CShwGestureControl

	 * C++ constructor

	 */

	CShwGestureControl();

	/**

	 * ConstructL

	 * 2nd Phase constructor

	 */ 

	void ConstructL( CAlfEnv& aEnv,CAlfDisplay& aDisplay ); 

private:

    /** Array of observers (does not own ) */

	// As per present design of the SS view, there is need only for one observer, 

	// but this is more generic. Also this doesnt seem like a perfomance critical path 

    RPointerArray<MShwGestureObserver> iObservers;

	};

#endif //SHWGESTURECONTROL_H