/*

* Copyright (c) 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:

*

*/

#ifndef CAMVIEWFINDERGRID_H

#define CAMVIEWFINDERGRID_H

#include <e32base.h>

class CBitmapContext;

/**

* Interface for viewfinder grid usage.

*/

class MCamVfGridDrawer

  {

  public:

    virtual void  InitL( TAny* aParam ) = 0;

    virtual void  Draw( CBitmapContext& aGc ) const = 0;

    virtual void  Draw( const TRect&          aRect,

                              CBitmapContext& aGc    ) const = 0;

    virtual void  SetVisible( TBool aVisible ) = 0;

    virtual TBool IsVisible() const = 0;

    // Essential to be able to destroy via mixin pointer.

    // Otherwise delete causes USER 42 panic.

    virtual ~MCamVfGridDrawer() 

      {}; 

  };

/**

* Factory class to instantiate viewfinder grid.

*/

class CCamVfGridFactory : public CBase

  {

  public:

    /**

    * CreateVfGridDrawer

    * @param  aUid The implementation id of grid drawer.

    * @return      Pointer to object of the implementing class

    *              or NULL if uid not supported.

    */

    static MCamVfGridDrawer* CreateVfGridDrawerL( TUid aUid );

  };

#endif