/*

* Copyright (c) 2003-2009 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:  ????????????????

*

*/

//INCLUDES

#include "CamZoomUpdateManager.h"

#include "CamUtility.h"

#include "CameraUiConfigManager.h"

//MACROS

// Cooldown period inbetween camera driver updates

const TInt KCamZoomCooldown    = 200000;  // .2  seconds

const TInt KCamMaxZoomCooldown = 250000;  // .25 seconds

// ====================== MEMBER FUNCTIONS =====================

// -----------------------------------------------------------------------------

// CCamZoomUpdateManager::NewL

// Two-phased constructor.

// -----------------------------------------------------------------------------

//

CCamZoomUpdateManager* CCamZoomUpdateManager::NewL( CCamAppController& aController )

    {

    PRINT((_L("CCamZoomUpdateManager::NewL in")));

    CCamZoomUpdateManager* self = new(ELeave) CCamZoomUpdateManager( aController );

    CleanupStack::PushL(self);

    self->ConstructL ();

    CleanupStack::Pop();

    PRINT((_L("CCamZoomUpdateManager::NewL out")));

    return self;

    }

// -----------------------------------------------------------------------------

// CCamZoomUpdateManager::CCamZoomUpdateManager

// C++ default constructor can NOT contain any code, that

// might leave.

// -----------------------------------------------------------------------------

//

CCamZoomUpdateManager::CCamZoomUpdateManager( CCamAppController& aController ) :

        CActive( /*EPriorityStandard*/ EPriorityUserInput ),

        iController( aController )

    {

    iDelayedUpdate = EFalse;

    }

// -----------------------------------------------------------------------------

// CCamZoomUpdateManager::~CCamZoomUpdateManager

// Destructor.

// -----------------------------------------------------------------------------

//

CCamZoomUpdateManager::~CCamZoomUpdateManager()

{

    PRINT((_L("CCamZoomUpdateManager::~CCamZoomUpdateManager() in")));

    Cancel();

    iTimer.Close();

    PRINT((_L("CCamZoomUpdateManager::~CCamZoomUpdateManager() out")));

}

// -----------------------------------------------------------------------------

// CCamZoomUpdateTimer::ConstructL

// Symbian 2nd phase constructor.

// -----------------------------------------------------------------------------

//

void CCamZoomUpdateManager::ConstructL()

    {

    PRINT((_L("CCamZoomUpdateManager::ConstructL() in")));

    TRAPD( err, ReadDelayValuesL() );

    if( err )

        {

        PRINT((_L("CCamZoomUpdateManager::ConstructL() error in reading delay values")));

        }

    User::LeaveIfError(iTimer.CreateLocal());

    CActiveScheduler::Add(this);

    PRINT((_L("CCamZoomUpdateManager::ConstructL() out")));

    }

// -----------------------------------------------------------------------------

// CCamZoomUpdateManager::SetZoomValue

// 

// -----------------------------------------------------------------------------

//

void CCamZoomUpdateManager::SetZoomValue( TInt aValue )

    {

    PRINT((_L("CCamZoomUpdateManager::SetZoomValue() => in")));

    // PUT IN MUTEX????

    // update value

    iValue = aValue;

    if ( IsActive() )

        {

        // check for starvation

        TTime current;

        current.UniversalTime();

        TInt64 delay = current.MicroSecondsFrom(iCooldownStart).Int64();

        if ( delay > iCamMaxZoomCooldown )

            {

            PRINT((_L("CCamZoomUpdateManager::SetZoomValue() <> IsActive, starved")));

            // force update if active object is starved

            Cancel();

            UpdateAndStartWait();

            }

        else

            {

            PRINT((_L("CCamZoomUpdateManager::SetZoomValue() <> IsActive, updating iValue")));

            // set the delayed update flag and wait

            iDelayedUpdate = ETrue;    

            }

        }

    else

        {

        PRINT((_L("CCamZoomUpdateManager::SetZoomValue() <> IsNotActive, setting zoom")));

        // notify controller and set active

        UpdateAndStartWait();

        }

    PRINT((_L("CCamZoomUpdateManager::SetZoomValue() <= out")));

    }

// -----------------------------------------------------------------------------

// CCamZoomUpdateManager::UpdateAndStartWait

// 

// -----------------------------------------------------------------------------

//

void CCamZoomUpdateManager::UpdateAndStartWait()

    {

    // update cooldown start time

    iCooldownStart.UniversalTime();

    // reset delayed update flag

    iDelayedUpdate = EFalse;

    // notify iController

    iController.SetZoomValue( iValue );

    // activate cooldown period

    SetActive();

    iTimer.After( iStatus, iCamZoomCooldown );

    }

// -----------------------------------------------------------------------------

// CCamZoomUpdateManager::RunL

// 

// -----------------------------------------------------------------------------

//

void CCamZoomUpdateManager::RunL()

    {

    PRINT((_L("CCamZoomUpdateManager::RunL() in")));

    //PUT IN MUTEX??

    if ( iDelayedUpdate )

        {

        // notify controller and set active

        UpdateAndStartWait();

        }

    PRINT((_L("CCamZoomUpdateManager::RunL() out")));

    }

// -----------------------------------------------------------------------------

// CCamZoomUpdateManager::DoCancel

// Cancels the timer

// -----------------------------------------------------------------------------

//

void CCamZoomUpdateManager::DoCancel()

    {

    PRINT((_L("CCamZoomUpdateManager::DoCancel() in")));

    // cancel the timer

    iTimer.Cancel();

    PRINT((_L("CCamZoomUpdateManager::DoCancel() out")));

    }

// -----------------------------------------------------------------------------

// CCamZoomUpdateManager::ReadDelayValuesL

// Gets delay values from cenrep

// -----------------------------------------------------------------------------

//

void CCamZoomUpdateManager::ReadDelayValuesL()

    {

    // default values are used in case of error

    iCamZoomCooldown = KCamZoomCooldown;

    iCamMaxZoomCooldown = KCamMaxZoomCooldown;

    RArray<TInt> delayValues;

    if( iController.UiConfigManagerPtr() )

        {

        iController.UiConfigManagerPtr()->SupportedZoomDelaysL( delayValues );

        iCamZoomCooldown = delayValues[0]*1000;

        iCamMaxZoomCooldown = delayValues[1]*1000;

        }

    }

// End of File