/*

* Copyright (c) 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:  Fade effect implementation.

*

*/

//////SYSTEM INCLUDES

//////TOOLKIT INCLUDES

// <cmail> SF

#include "emailtrace.h"

#include <alf/alfvisual.h>

#include <alf/alftimedvalue.h>

#include <alf/alflayout.h>

#include <alf/alfenv.h>

#include <alf/alfcommand.h>

#include <alf/alfcontrol.h>

#include <alf/alfevent.h>

// </cmail>

//////PROJECT INCLUDES

//<cmail> removed __FS_ALFRED_SUPPORT flag

//#include <fsconfig.h>

//</cmail> removed __FS_ALFRED_SUPPORT flag

#include "fsfadeeffect.h"

//<cmail>

#include "fsfadeeffectobserver.h"

//</cmail>

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

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

// Two-phased constructor.

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

//

CFsFadeEffect* CFsFadeEffect::NewL(CAlfControl* aControl,CAlfVisual* aRoot, TInt aTime)

    {

    FUNC_LOG;

    CFsFadeEffect* self = new (ELeave) CFsFadeEffect(aControl, aRoot, aTime);

    return self;

    }

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

// Two-phased constructor.

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

//    

CFsFadeEffect* CFsFadeEffect::NewL(

    CAlfControl* aControl,

    MFsFadeEffectObserver* aObserver, 

    CAlfVisual* aRoot, 

    TInt aTime)

    {

    FUNC_LOG;

    CFsFadeEffect* self = new (ELeave) CFsFadeEffect(aControl, aObserver, aRoot, aTime);    

    return self;

    }

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

// Constructor.

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

//    

CFsFadeEffect::CFsFadeEffect(CAlfControl* aControl,CAlfVisual* aRoot, TInt aTime)

    : iControl( aControl ), 

      iRoot(aRoot), 

      iTime(aTime)

    {

    FUNC_LOG;

    //No implementation nedeed

    }

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

// Constructor.

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

//

CFsFadeEffect::CFsFadeEffect(

    CAlfControl* aControl,

    MFsFadeEffectObserver* aObserver, 

    CAlfVisual* aRoot, TInt aTime)

    : iControl( aControl ),

      iRoot(aRoot),

      iObserver(aObserver), 

      iTime(aTime)

    {

    FUNC_LOG;

    //No implementation nedeed

    }

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

// Launches fade in effect.

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

//    

void CFsFadeEffect::FadeIn()

    {

    FUNC_LOG;

    TAlfTimedValue opacity;

    opacity.SetValueNow( 0 );

    iRoot->SetOpacity( opacity );

    opacity.SetTarget( 1.0f, iTime );    

    iRoot->SetOpacity(opacity); 

    if (iObserver)

        {

        iObserver->FadeEffectEvent(MFsFadeEffectObserver::EFadingIn);

        }

    //cancel pending events

    if ( iControl )

        {

        iControl->Env().CancelCustomCommands(this);

        //send a command to inform about an end of fade out effect

        TInt error = iControl->Env().Send(TAlfCustomEventCommand(ECustomEventFadeInFinished, this), iTime);

        if (error != KErrNone)

            {

            }

        }

    }

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

// Launches fade out effect.

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

//        

void CFsFadeEffect::FadeOut()

    {

    FUNC_LOG;

    TAlfTimedValue opacity;

    opacity.SetTarget( 0.0f, iTime ); 

    iRoot->SetOpacity(opacity);

    if (iObserver)

        {

        iObserver->FadeEffectEvent(MFsFadeEffectObserver::EFadingOut);

        }

    //cancel pending events

    if ( iControl )

        {

        iControl->Env().CancelCustomCommands(this);

        //send a command to inform about an end of fade out effect

        TInt error = iControl->Env().Send(TAlfCustomEventCommand(ECustomEventFadeOutFinished, this), iTime);

        if (error != KErrNone)

            {

            }

        }

    }

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

// Sets speed of fade in/out effect.

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

//        

void CFsFadeEffect::SetTime( const TInt aTime)

    {

    FUNC_LOG;

    iTime = aTime;

    }

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

// Returns speed of fade in/out effect.

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

//    

TInt CFsFadeEffect::Time() const

    {

    FUNC_LOG;

    return iTime;    

    }

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

// From MAlfEventHandler

// Called when an input event is being offered to this object.

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

//

TBool CFsFadeEffect::OfferEventL(const TAlfEvent& aEvent)

    {

    FUNC_LOG;

    TBool result(EFalse);

    if( aEvent.IsCustomEvent() )

        {

        if ( aEvent.CustomParameter() == ECustomEventFadeInFinished )

            {

            result = ETrue;

            //inform observer

            if ( iObserver )

                {

                iObserver->FadeEffectEvent(MFsFadeEffectObserver::EFadeInFinished);

                }

            }

        else if ( aEvent.CustomParameter() == ECustomEventFadeOutFinished )

            {

            result = ETrue;

            //inform observer

            if ( iObserver )

                {

                iObserver->FadeEffectEvent(MFsFadeEffectObserver::EFadeOutFinished);

                }

            }

        }

    else

        {

        result = EFalse;

        }

    return result;

    }

//End Of File