/*

* Copyright (c) 2009-2010 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 CXEAUTOFOCUSCONTROLSYMBIAN_H

#define CXEAUTOFOCUSCONTROLSYMBIAN_H

#include <QVariant>

#include <ecam.h> // CCamera

#include <ecam/ecamadvsettingsintf.h> // CCamera

#include "cxenamespace.h"

#include "cxeautofocuscontrol.h"

#include "cxestatemachine.h"

//forward declarations

class CxeCameraDevice;

class CxeSettings;

/**

 * CxeAutoFocusControl is responsible for handling Autofocus events from the camera adaptation.

 * It also routes the Autofocus successful and failed events to the clients interested in Žknowing the

 * status of Autofocus.

 */

class CxeAutoFocusControlSymbian : public CxeAutoFocusControl,

                                   public CxeStateMachine

    {

    Q_OBJECT

public:

    CxeAutoFocusControlSymbian( CxeCameraDevice &cameraDevice, CxeSettings &settings );

    virtual ~CxeAutoFocusControlSymbian();

    CxeError::Id  start(bool soundEnabled = true);

    void cancel();

    void setMode( CxeAutoFocusControl::Mode newMode );

    CxeAutoFocusControl::Mode mode() const;

    bool isFixedFocusMode(CxeAutoFocusControl::Mode mode) const;

    CxeAutoFocusControl::State state() const;

    bool supported() const;

    bool isSoundEnabled() const;

protected: // from CxeStateMachine

    void handleStateChanged( int newStateId, CxeError::Id error );

protected:

    void initializeStates();

    // intializes all the resources we need for AF functionality

    void initializeResources();

    void setFocusRange(CCamera::CCameraAdvancedSettings::TFocusRange range);

    CCamera::CCameraAdvancedSettings::TFocusRange  focusRange() const;

    void setFocusType(CCamera::CCameraAdvancedSettings::TAutoFocusType type);

    int supportedFocusTypes() const;

    CCamera::CCameraAdvancedSettings::TAutoFocusType focusType() const;

protected slots:

    // notifications when camera reference is changed

    void prepareForCameraDelete();

    void handleCameraAllocated(CxeError::Id error);

    // notification for when camera is released

    void prepareForRelease();

    // Handle ECam events

    void handleCameraEvent( int eventUid, int error );

    void handleSceneChanged(const QVariant &scene);

    void handleSettingValueChanged(const QString &settingId, QVariant newValue);

private:

    // handles to-do things if the event is AF event

    void handleAfEvent(int eventUid, int error);

protected:

    CxeCameraDevice &mCameraDevice;

    CCamera::CCameraAdvancedSettings *mAdvancedSettings; // not owned

    CxeAutoFocusControl::Mode mAfMode;

    CCamera::CCameraAdvancedSettings::TFocusRange mAFRange;

    CxeSettings &mSettings;

    bool mCancelled;

    bool mSoundEnabled;

    bool mFaceTrackingOverride; //need for temporary override of the AF mode if FT is enabled by user

    CxeAutoFocusControl::Mode mPreviousAFMode; //for restoring previous AF mode in case of FT override

    };

#endif // CXEAUTOFOCUSCONTROLSYMBIAN_H