/*

* 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:  Location editors 

*

*/

#ifndef AKNLOCATIONED_H

#define AKNLOCATIONED_H

#include <eikmfne.h>

class TPosition;

class CLocationStrings;

/**

 * Editor for TPosition type; latitude and longitude editor

 *

 * There exists two ways to construct CAknLocationEditor:

 *

 * @code

 * CAknLocationEditor *editor = CAknLocationEditor::NewL(pos, context);

 * @endcode

 * 

 * Using resources:

 *

 * @code

 * CAknLocationEditor *editor = new (ELeave) CAknLocationEditor

 * TResourceReader reader;

 * iCoeEnv->CreateResourceReaderLC(reader,R_RES_ID_FOR_EDITOR);

 * editor->ConstructFromResourceL(reader);

 * editor->Set(pos);

 * CleanupStack::PopAndDestroy();

 * @endcode

 * 

 * Resource file format is as follows:

 * @code

 *     LATITUDE_EDITOR

 *        {

 *	      flags = ELocationEdFlagLatitude;

 *		  latlongresourceid = R_EIK_LATITUDE_AND_LONGITUDE;

 *        };

 * @endcode

 *  or:

 * @code

 *      LONGITUDE_EDITOR

 *        {

 *		  flags = ELocationEdFlagLongitude;

 *		  latlongresourceid = R_EIK_LATITUDE_AND_LONGITUDE;

 *        };

 * @endcode

 *

 *  @lib eikctl.lib

 *  @lib lbs.lib (for TPosition class)

 *  @since 3.2

 *  @see TPosition

 */

class CAknLocationEditor : public CEikMfne

	{

public:

	/**

	 * TLocationContext determines what part of TPosition class is used for this editor.

     *  ELongitudeOnly means only longitude part of TPosition is used.

     *  ELatitudeOnly means only latitude part of TPosition is used.

	 */

	enum TLocationContext

		{

		ELongitudeOnly = 0x1,

		ELatitudeOnly  = 0x2

		};

    /**

     * Constructor

     */

	IMPORT_C CAknLocationEditor();

    /**

     * Destructor

     */

	IMPORT_C ~CAknLocationEditor();

    /**

     * NewL()

     *    Creates location editor and initializes it's value to value determined by the aValue parameter.

	 *

     * @param aValue Initial value for location editor.

     * @param aContext Which part of the TPosition is used for this location editor

     */

	IMPORT_C static CAknLocationEditor* NewL( TPosition &aValue, TLocationContext aContext );

	/**

	 * ConstructFromResourceL

     *     Constructs location editor using information from resource files

     *

     * @param aResourceReader resource reader

	 */

	IMPORT_C void ConstructFromResourceL( TResourceReader& aResourceReader );

	/**

	 * DisplayableLocationL()

	 *    Converts TPosition into displayable descriptor usable for listboxes

     *

	 * @param aValue value of the location

	 * @param aContext which part of the TPosition is used

	 */

	IMPORT_C static HBufC* DisplayableLocationL( const TPosition &aValue, TLocationContext aContext );

    /**

     * PrepareForFocusLossL()

     *     detects focus changes to validate editor contents

     */

	IMPORT_C virtual void PrepareForFocusLossL();

	/**

     * Set()

     *     Sets either longitude or latitude values of aValue

     *

	 *  @param aValue new value for the editor

     */

	IMPORT_C void Set(const TPosition &aValue);

	/**

	 * Get()

     *      Gets either longitude or latitude values of aValue

     *

     * @param aValue TPosition object that will be modified

     */

	IMPORT_C void Get( TPosition &aValue ) const;

	/**

	 * OfferKeyEventL()

	 *         key event handling of location editor

	 */

	IMPORT_C TKeyResponse OfferKeyEventL(const TKeyEvent& aKeyEvent, TEventCode aType);

private:

	enum TLocationType

		{

		EDD,

		EDMM,

		EDMSD

		};

	TLocationType Type() const;

	static void Split( const TPosition &aValue, 

					   TLocationContext aContext, 

					   TInt &aDegrees, 

					   TInt &aDeciDegrees, 

					   TInt &aMinutes, 

					   TInt &aDeciMinutes, 

					   TInt &aSeconds, 

					   TInt &aDeciSeconds, 

					   TBool &aNeg, 

					   TBool &aNan );

	static void SplitDD( const TPosition &aValue, 

						 TLocationContext aContext, 

						 TInt &aDegrees,

						 TInt &aDeciDegrees, 

						 TBool &aNeg, 

						 TBool &aNan );

	static void SplitDMM( const TPosition &aValue, 

	                      TLocationContext aContext, 

	                      TInt &aDegrees, 

	                      TInt &aMinutes, 

	                      TInt &aDeciMinutes, 

	                      TBool &aNeg, 

	                      TBool &aNan );

	static void SplitDMSD( const TPosition &aValue, 

						   TLocationContext aContext, 

						   TInt &aDegrees, 

						   TInt &aMinutes, 

						   TInt &aSeconds, 

						   TInt &aDeciSeconds, 

						   TBool &aNeg, 

						   TBool &aNan );

	static void CombineDD( TPosition &aValue, 

						   TLocationContext aContext, 

						   TInt aDegrees, 

						   TInt aDeciDegrees, 

						   TBool aNeg, 

						   TBool aNan );

	static void CombineDMM( TPosition &aValue, 

							TLocationContext aContext, 

							TInt aDegrees, 

							TInt aMinutes, 

							TInt aDeciMinutes, 

							TBool aNeg, 

							TBool aNan );

	static void CombineDMSD( TPosition &aValue, 

							 TLocationContext aContext, 

							 TInt aDegrees, 

							 TInt aMinutes, 

							 TInt aSeconds, 

							 TInt aDeciSeconds, 

							 TBool aNeg, 

							 TBool aNan );

private:

	void SetUninitialised(TBool aInitialised);

	void RefreshFromLocale();

	void ConstructL( TPosition &aValue, TLocationContext aContext );

public:

	void HandleCenRepChangedL(TUint32 aKey, TInt aValue);

	void CreateMfneFieldsL(const TPosition &aValue);

private:

	void LoadStringsL( TInt aResourceId );

	/**

	* Maps logical MFNE field order to correct visual order.

	* @param aFieldNumber Field position in logical format.

	* @param aType Used location editor format.

	* @return Field position in visual format.

	*/

	TInt FieldMapping(const TInt aFieldNumber, const TLocationType aType) const;

protected:

	IMPORT_C virtual void* CAknLocationEditor_ExtensionInterface( TUid aInterface ); 

private:

	CLocationStrings* iStrings;

	TLocationContext iContext;

	};

#endif