/*

* Copyright (c) 2007-2009 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:  ESMR field storage definition

*

*/

#ifndef CESMRFIELDSTORAGE_H

#define CESMRFIELDSTORAGE_H

#include <e32base.h>

//<cmail>

#include "esmrdef.h"

//</cmail>

#include "mesmrfieldstorage.h"

#include "cesmrfieldbuilderinterface.h"

class CESMRField;

class MESMRCalEntry;

class MESMRFieldEventObserver;

class CESMRFieldEventQueue;

/**

 * CESMRFieldStorage is a base class for different storage classes.

 * Storage class owns the fields needed to draw UI. This class also has methods

 * to add new fields into field array.

 *

 * fields for the ui are created are created in a separate ecom plugin 

 * loaded here

 */

NONSHARABLE_CLASS( CESMRFieldStorage ): public CBase, 

										public MESMRFieldStorage

    {

public:

    // Destructor

    virtual ~CESMRFieldStorage();

public:

    /**

     * Adds new field into field array.

     *

     * @param aField - field to be added

     */

    void AddFieldL( CESMRField* aField );

    /**

     * Adds new field into field array.

     *

     * @param aField - field to be added

     * @param aVisible - is this field visible by default ot not.

     */

    void AddFieldL( CESMRField* aField, TBool aVisible );

   /**

     * Creates editor field.

     *

     * @param aValidator - time validator

     * @param aField - field to be created

     */

    CESMRField* CreateEditorFieldL(

                MESMRFieldValidator* aValidator,

                TESMREntryField aField );

    /**

     * Creates viewer field.

     *

     * @param aResponseObserver - observer to be called when e.g.

     *                            answer is ready to be sent.

     * @param aField - field to be created

     * @param aResponseReady - NOT IN USE

     */

    CESMRField* CreateViewerFieldL(

                MESMRResponseObserver* aResponseObserver,

                TESMREntryField aField,

                TBool aResponseReady );

public: // From MESMRFieldStorage

    TInt Count() const;

    CESMRField* Field( TInt aInd ) const;

    CESMRField* FieldById( TESMREntryFieldId aId ) const;

    virtual void InternalizeL( MESMRCalEntry& aEntry );

    virtual void ExternalizeL( MESMRCalEntry& aEntry );

    virtual TInt Validate( TESMREntryFieldId& aId, TBool aForceValidate );

protected:

    // C++ constructor

    CESMRFieldStorage(

            MESMRFieldEventObserver& aEventObserver );

    void BaseConstructL();

    CESMRFieldEventQueue& EventQueueL();

private:

    /**

     * loads fieldbuilder ecom plugin

     * delayed until the first time the plugin is needed

     */

    void LoadPluginL();

    MESMRFieldBuilder* FieldBuilderL();    

private:

    /// Own: Array that owns all the fields

    RPointerArray< CESMRField > iArray;

    /// Own: ecom field builder interface

    CESMRFieldBuilderInterface* iPlugin;

    /// Ref: composite class of field builder interface

    MESMRFieldBuilder* iFieldBuilder;

    /// Ref: Event observer

    MESMRFieldEventObserver& iEventObserver;

    /// Own: Event Queue

    CESMRFieldEventQueue* iEventQueue;

    };

#endif // CESMRFIELDSTORAGE_H

// EOF