/*

* Copyright (c) 2002 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:  

*     This class is a data container of unit conversion parameters

*     for a single unit.

*     It is able to construct itself from a resource file.

*

*/

#ifndef __TCNVUNIT_H__

#define __TCNVUNIT_H__

// INCLUDES

#include <e32base.h>

#include "CCnvConverter.h"

// FORWARD DECLARATIONS

class TResourceReader;

class RWriteStream;

// CONSTANTS

const TInt KMaxUnitNameLength = 36;

// CLASS DEFINITION

/**

* This class is a data container of unit conversion parameters

* for a single unit.

* It is able to construct itself from a resource file.

*/

class TCnvUnit

	{

	public: // Constructors

		TCnvUnit();

	public:	// new methods.

		/**

		* Constructs this unit from a CNV_UNIT or CNV_UNIT_TEMPERATURE

		* resource.

		* @param aReader A resource reader object initialised to a resource.

		* @param aIsTemperature EFalse if we are going to read a CNV_UNIT

		*        resource, ETrue if a CNV_UNIT_TEMPERATURE.

		*/

		void ReadFromResource( TResourceReader& aReader,

							   TBool aIsTemperature = EFalse, TBool aIsCurrencyUnit =EFalse);

		/**

		* Stores the member variables to the given stream.

		* @param aStream Stream for writing.

		*/

		void ExternalizeL( RWriteStream& aStream ) const;

		/**

		* Loads the member variables from the given stream.

		* @param aStream Stream for reading.

		*/

		void InternalizeL( RReadStream& aStream , TBool aIsCurrencyCategory = EFalse);

	public: // data

		/**

		* The factor for converting this unit to the base unit.

		*/

		TReal iFactor;

		/**

		* The offset for converting this unit to the base unit.

		* Used only with temperature units.

		*/

		TReal iOffset;

		/**

		* Minimum allowable unit amount in conversion.

		* Used only with temperature units.

		*/

		TReal iMinimum;

		/**

		* Unit name. Max lengh of 35 used in unit name queries.

		*/

		TBuf< KMaxUnitNameLength > iName;

		/**

		* Id of the unit. Used to identify unit among all other units.

		* Unique.

		*/

		TUint iId;

//	private: // data

		/**

		* ETrue if this unit defines a temperature, EFalse otherwise.

		*/

		TBool iIsTemperatureUnit;

		TBool iIsCurrencyUnit;

		TCurrencyType iNameType;

	};

#endif // __TCNVUNIT_H__