/*

* Copyright (c) 2007-2008 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:    Control to create a black background for the slideshow

*

*/

#include "shwslideshowblackoutcontrol.h"

#include <uiacceltk/huienv.h> 

#include <uiacceltk/huidisplay.h>

#include <uiacceltk/huiImageVisual.h>

#include <uiacceltk/huiAnchorLayout.h>

#include "glxhuiutility.h"

namespace

	{

	/**

	 * Time to complete blackout

	 */

	const TInt KShwBlackoutDelay = 0;

	/**

	 * Opacity value - fully opaque

	 */

	const TInt KShwOpaque = 1;

	/**

	 * Opacity value - transparent

	 */

	const TInt KShwTransparent = 0;

	const TInt KShwScreenSizeMultiplier = 3;

	const TInt KShwOrigin = 0;

	}

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

// Constructor

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

//

CShwBlackoutControl* CShwBlackoutControl::NewL( CHuiEnv& aEnv,

	CHuiDisplay& aDisplay )

    {

    CShwBlackoutControl* self = new( ELeave )

        CShwBlackoutControl( aEnv, aDisplay );

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop( self );

    return self;

    }

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

// Constructor

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

//

CShwBlackoutControl::CShwBlackoutControl( CHuiEnv& aEnv, CHuiDisplay& aDisplay )

        : CHuiControl( aEnv ), iDisplay( aDisplay )

    {    

    BindDisplay( aDisplay );

    }

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

// ConstructL

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

//

void CShwBlackoutControl::ConstructL()

    {

    // Create the black background to fade out the rest of the screen

	iBlackoutTexture = CHuiTexture::NewL();

	CGlxHuiUtility::UploadFlatColourToTextureL( KRgbBlack, iBlackoutTexture );

	iBlackoutLayout = CHuiAnchorLayout::AddNewL( *this );

	iBlackoutLayout->SetClipping( EFalse );

	iBlackoutImageVisual = CHuiImageVisual::AddNewL( *this, iBlackoutLayout );

	iBlackoutImageVisual->SetImage( THuiImage( *iBlackoutTexture ) );

	iBlackoutImageVisual->iOpacity.Set( KShwTransparent );

	iBlackoutImageVisual->SetFlag( EHuiVisualFlagManualLayout );

	TSize displaySize = iDisplay.Size();

	iBlackoutImageVisual->SetSize( THuiRealSize(

	    displaySize.iWidth * KShwScreenSizeMultiplier,

		displaySize.iHeight * KShwScreenSizeMultiplier ));

	iBlackoutImageVisual->SetPos( THuiRealPoint( KShwOrigin, KShwOrigin) );

    }

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

// Destructor

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

//

CShwBlackoutControl::~CShwBlackoutControl()

    {   

    delete iBlackoutTexture;

    }

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

// ActivateL

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

//

void CShwBlackoutControl::ActivateL()

    {

    if ( !iActivated )

        {        

        iBlackoutImageVisual->iOpacity.Set( KShwOpaque, KShwBlackoutDelay );

        iActivated = ETrue;

        }

    }

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

// Deactivate

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

//

void CShwBlackoutControl::Deactivate()

    {

    if ( iActivated )

        {

        iBlackoutImageVisual->iOpacity.Set( KShwTransparent,

            KShwBlackoutDelay );

        iActivated = EFalse;

        }

    }