/*

* Copyright (c) 2006-2009 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:  An interface to Location Trail.

*

*/

#ifndef R_RLOCATIONTRAIL_H

#define R_RLOCATIONTRAIL_H

#include <e32base.h>

#include <etel3rdparty.h>

#include <lbsposition.h>

#include <rlocationmanager.h>

#include <locationdatatype.h>

typedef TPckg<TLocality> TLocalityPckg;

/**

 *  RLocationManager class is used for creating a Location Manager session.

 *  Location Manager is used to start and stop the location trail, retrieve 

 *  location information and write the location information to images.

 *

 *  @lib LocationManager.lib

 *  @since S60 3.1

 */

NONSHARABLE_CLASS( RLocationTrail ) : public RLocationManager

    {

public:

    /**

     * Location trail states.

     */

    enum TTrailState

        {

        ETrailStopped,

        EWaitingGPSData,

        ESearchingGPS,

        ETrailStarted,

        ETrailStopping,

        ETrailStarting

        };

    enum TTrailCaptureSetting

    	{

    	EOff,

    	ECaptureNetworkInfo,

    	ECaptureAll 

    	};

public:

	IMPORT_C RLocationTrail();

	IMPORT_C ~RLocationTrail();

    /**

     * Starts recording location information to location trail.

     * @since S60 3.2

     * @param aState, an enumeration of ECaptureNetworkInfo  

     * (only cell ID stored) and ECaptureAll 

     * (GPS coordinates and cell ID stored).

     * @return KErrNone if successful, otherwise one of the other 

     *         system-wide error codes.

     */

    IMPORT_C TInt StartLocationTrail(TTrailCaptureSetting aState);

    /**

     * Stops recording location information to location trail.

     * @since S60 3.1

     * @param None.

     * @return KErrNone if successful, otherwise one of the other 

     *         system-wide error codes.

     */

    IMPORT_C TInt StopLocationTrail();

    /**

     * Retuns the current state of the location trail.

     * @since S60 3.1

     * @param aState, The state of the trail is returned.

     * @return KErrNone if successful, otherwise one of the other 

     *         system-wide error codes.

     */

    IMPORT_C TInt GetLocationTrailState( TTrailState& aState );

    /**

     * Get notification when the location trail state changes.

     * @since S60 3.1

     * @param aStatus, The request status. 

     * @return None.

     */

    IMPORT_C void NotifyLocationTrailStateChange( TRequestStatus& aStatus ); 

    /**

     * Cancel notification request for the location trail state change.

     * @since S60 3.1

     * @param None.

     * @return None.

     */

    IMPORT_C void CancelNotificationRequest();    

    /**

     * Get location by time stamp. If the TLocality for given time stamp is 

     * found from the trail, it is returned even if the data in it wouldn't 

     * be valid.

     * @since S60 3.1

     * @param aTimeStamp, Time stamp to get corresponding location.

     * @param aPosition, Position value returned.

     * @param aNetworkInfo, Network value returned.

     * @param aState, State of the trail at given time.

     * @return KErrNone if successful, otherwise one of the other 

     *         system-wide error codes.

     */                                

    IMPORT_C TInt RetrieveLocation( const TTime& aTimeStamp, 

    								TLocationData& aLocationData,

                                    TTrailState& aState );

    /**

     * Retrieve current location. If request is completed successfully, the 

     * result is returned via the aLocationInfo and aNetworkInfo arguments. 

     * The function is asynchronous, because it may take 

     * several minutes to get location information. 

     * @since S60 3.2

     * @param aStatus, The request status.

     * @param aLocationData, locationData encapsulates all location data

     * @return None.

     */

    IMPORT_C void CurrentLocation( TRequestStatus& aStatus, 

    							   TLocationData& aLocationData);					

    /**

     * Cancel asynchronous location request.

     * @since S60 3.1

     * @param None.

     * @return None.

     */

    IMPORT_C void CancelLocationRequest();

    /**

     * Get current trail capture setting.

     * @return EOff, ECaptureNetworkInfo or ECaptureAll

     */

    IMPORT_C TInt GetTrailCaptureSetting( TTrailCaptureSetting& aCaptureSetting );

private:

	TPckg<TLocationData>* iCurrentLocData;

    };

#endif // R_RLOCATIONTRAIL_H

//End of File