/*

* 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: cuicscrollbar.cpp

*

*/

#include "cuicscrollbar.h"

#include "emailtrace.h"

#include <alf/alfenv.h>

#include <alf/alfevent.h>

#include <alf/alfimagevisual.h>

#include <alf/alftexture.h>

#include <alf/alfanchorlayout.h>

#include <alf/alfdecklayout.h>

// Constants

// Scroll bar opacity (visible)

const TReal32 KVisibleOpacity = 1.0f;

// Thumb opacity (visible)

const TReal32 KVisibleOpacityThumb = 0.85f;

// Background opacity (visible)

const TReal32 KVisibleOpacityBackground = 0.65f;

// How long scrollbar will be visible after change

const TReal32 KVisibleTimeout = 500;

// How long fading will take

const TReal32 KFadeTimeout = 500;

// Width of the scrollbar (this will be replaced with value from layout)

const TInt KScrollBarWidth = 18;

// CUiCCompositeImage

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

// CUiCCompositeImage::NewL

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

//

CUiCCompositeImage* CUiCCompositeImage::NewL( CAlfControl& aControl,

        CAlfLayout* aParentLayout, CAlfTexture& aTop,

        CAlfTexture& aMiddle, CAlfTexture& aBottom )

    {

    FUNC_LOG;

    CUiCCompositeImage* self = new (ELeave) CUiCCompositeImage();

    CleanupStack::PushL( self );

    self->ConstructL( aControl, aParentLayout, aTop, aMiddle, aBottom );

    CleanupStack::Pop(); // self

    return self;

    }

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

// CUiCCompositeImage::~CUiCCompositeImage

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

//

CUiCCompositeImage::~CUiCCompositeImage()

    {

    FUNC_LOG;

    }

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

// CUiCCompositeImage::Layout

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

//

CAlfLayout& CUiCCompositeImage::Layout()

    {

    FUNC_LOG;

    return *iLayout;

    }

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

// CUiCCompositeImage::CUiCCompositeImage

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

//

CUiCCompositeImage::CUiCCompositeImage()

    {

    FUNC_LOG;

    }

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

// CUiCCompositeImage::ConstructL

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

//

void CUiCCompositeImage::ConstructL( CAlfControl& aControl, CAlfLayout* aParentLayout,

        CAlfTexture& aTop, CAlfTexture& aMiddle, CAlfTexture& aBottom )

    {

    FUNC_LOG;

    iLayout = CAlfAnchorLayout::AddNewL( aControl, aParentLayout );

    iTop = CAlfImageVisual::AddNewL( aControl, iLayout );

    iTop->SetImage( TAlfImage( aTop ) );

    iMiddle = CAlfImageVisual::AddNewL( aControl, iLayout );

    iMiddle->SetImage( TAlfImage( aMiddle ) );

    iBottom = CAlfImageVisual::AddNewL( aControl, iLayout );

    iBottom->SetImage( TAlfImage( aBottom ) );

    SetAnchors();

    }

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

// CUiCCompositeImage::SetAnchors

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

//

void CUiCCompositeImage::SetAnchors()

    {

    FUNC_LOG;

    // iTop

    iLayout->SetAnchor(

            EAlfAnchorTopLeft, 0,

            EAlfAnchorOriginLeft, EAlfAnchorOriginTop,

            EAlfAnchorMetricAbsolute, EAlfAnchorMetricAbsolute,

            TAlfTimedPoint( 0, 0 ) );

    iLayout->SetAnchor(

            EAlfAnchorBottomRight, 0,

            EAlfAnchorOriginRight, EAlfAnchorOriginTop,

            EAlfAnchorMetricAbsolute, EAlfAnchorMetricAbsolute,

            TAlfTimedPoint( 0, KScrollBarWidth  ) );

    // iMiddle

    iLayout->SetAnchor(

            EAlfAnchorTopLeft, 1,

            EAlfAnchorOriginLeft, EAlfAnchorOriginTop,

            EAlfAnchorMetricAbsolute, EAlfAnchorMetricAbsolute,

            TAlfTimedPoint( 0, KScrollBarWidth ) );

    iLayout->SetAnchor(

            EAlfAnchorBottomRight, 1,

            EAlfAnchorOriginRight, EAlfAnchorOriginBottom,

            EAlfAnchorMetricAbsolute, EAlfAnchorMetricAbsolute,

            TAlfTimedPoint( 0, -KScrollBarWidth  ) );

    // iBottom

    iLayout->SetAnchor(

            EAlfAnchorTopLeft, 2,

            EAlfAnchorOriginLeft, EAlfAnchorOriginBottom,

            EAlfAnchorMetricAbsolute, EAlfAnchorMetricAbsolute,

            TAlfTimedPoint( 0, -KScrollBarWidth ) );

    iLayout->SetAnchor(

            EAlfAnchorBottomRight, 2,

            EAlfAnchorOriginRight, EAlfAnchorOriginBottom,

            EAlfAnchorMetricAbsolute, EAlfAnchorMetricAbsolute,

            TAlfTimedPoint( 0, 0  ) );

    iLayout->UpdateChildrenLayout();

    }

// CUiCScrollBar

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

// CUiCScrollBar::NewL

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

//

CUiCScrollBar* CUiCScrollBar::NewL( CAlfEnv& aEnv, CAlfLayout* aParentLayout )

    {

    FUNC_LOG;

    CUiCScrollBar* self = new (ELeave) CUiCScrollBar();

    CleanupStack::PushL( self );

    self->ConstructL( aEnv, aParentLayout );

    CleanupStack::Pop(); // self

    return self;

    }

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

// CUiCScrollBar::~CUiCScrollBar

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

//

void CUiCScrollBar::Destroy()

    {

    FUNC_LOG;

    delete this;

    }

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

// CUiCScrollBar::Show

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

//

void CUiCScrollBar::Show( const TBool aShow )

    {

    FUNC_LOG;

    Env().CancelCustomCommands( this );

    TAlfTimedValue opacity( aShow ? KVisibleOpacity : 0 );

    iDeck->SetOpacity( opacity );

    if ( aShow )

        {

        iThumbVisual->Layout().SetOpacity( KVisibleOpacityThumb );

        iBackGroundVisual->Layout().SetOpacity( KVisibleOpacityBackground );

        TAlfCustomEventCommand command( EFadeOut, this );

        Env().Send( command, KVisibleTimeout );

        }

    }

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

// CUiCScrollBar::UpdateModelL

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

//

void CUiCScrollBar::UpdateModelL( const TUiCScrollBarModel& aModel )

    {

    FUNC_LOG;

    iModel = aModel;

    if ( iModel.ScrollBarNeeded() )

        {

        SetThumbAnchors();

        Show( ETrue );

        }

    else

        {

        Show( EFalse );

        }

    }

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

// CUiCScrollBar::ThumbPosition

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

//

TInt CUiCScrollBar::ThumbPosition() const

    {

    FUNC_LOG;

    return iModel.ThumbPosition();

    }

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

// CUiCScrollBar::SetRect

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

//

void CUiCScrollBar::SetRect( const TRect& aRect )

    {

    FUNC_LOG;

    TAlfRealRect realRect( aRect );

    iDeck->SetRect( realRect );

    iDeck->UpdateChildrenLayout();

    }

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

// CUiCScrollBar::Redraw

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

//

void CUiCScrollBar::Redraw()

    {

    FUNC_LOG;

    }

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

// CUiCScrollBar::NotifyThemeChanged

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

//

void CUiCScrollBar::NotifyThemeChanged()

    {

    FUNC_LOG;

    }

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

// CUiCScrollBar::LayoutHints

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

//

TInt CUiCScrollBar::LayoutHints() const

    {

    FUNC_LOG;

    return ELayoutOnTopOfList | ELayoutRelativeToList |

        ELayoutAutomaticMirroring;

    }

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

// CUiCScrollBar::OfferEventL

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

//

TBool CUiCScrollBar::OfferEventL( const TAlfEvent& aEvent )

    {

    FUNC_LOG;

    TBool handled( EFalse );

    if ( aEvent.Type() == TAlfEvent::ETypeCustom )

        {

        if ( aEvent.CustomParameter() == EFadeOut )

            {

            handled = ETrue;

            TAlfTimedValue opacity( 0, KFadeTimeout );

            iDeck->SetOpacity( opacity );

            }

        }

    else

        {

        handled = CAlfControl::OfferEventL( aEvent );

        }

    return handled;

    }

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

// CUiCScrollBar::ProvideBitmapL

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

//

void CUiCScrollBar::ProvideBitmapL( TInt aId, CFbsBitmap*& aBitmap, CFbsBitmap*& aMaskBitmap )

    {

    FUNC_LOG;

    TAknsItemID itemId;

    switch ( aId )

        {

        case EThumbTop:

            itemId = KAknsIIDQsnCpScrollHandleTop;

            break;

        case EThumbMiddle:

            itemId = KAknsIIDQsnCpScrollHandleMiddle;

            break;

        case EThumbBottom:

            itemId = KAknsIIDQsnCpScrollHandleBottom;

            break;

        case EBackgroundTop:

            itemId = KAknsIIDQsnCpScrollBgTop;

            break;

        case EBackgroundMiddle:

            itemId = KAknsIIDQsnCpScrollBgMiddle;

            break;

        case EBackgroundBottom:

            itemId = KAknsIIDQsnCpScrollBgBottom;

            break;

        default:

            User::Leave( KErrNotFound );

        }

    AknsUtils::CreateIconL( AknsUtils::SkinInstance(), itemId, aBitmap, aMaskBitmap, KNullDesC, -1, -1 );

    if ( aBitmap )

        {

        TAknContentDimensions origDim;

        AknIconUtils::GetContentDimensions( aBitmap, origDim );

        TSize iconSize( origDim.iWidth, origDim.iHeight );

        if (iconSize.iWidth != KScrollBarWidth && iconSize.iWidth > 0)

            {

            iconSize.iHeight = iconSize.iHeight * KScrollBarWidth / iconSize.iWidth;

            iconSize.iWidth = KScrollBarWidth;

            }

        AknIconUtils::DisableCompression( aBitmap );

        AknIconUtils::SetSize( aBitmap, iconSize, EAspectRatioNotPreserved );

        if ( aMaskBitmap )

            {

            AknIconUtils::DisableCompression( aMaskBitmap );

            AknIconUtils::SetSize( aMaskBitmap, iconSize, EAspectRatioNotPreserved );

            }

        }

    }

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

// CUiCScrollBar::~CUiCScrollBar

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

//

CUiCScrollBar::~CUiCScrollBar()

    {

    FUNC_LOG;

    Env().CancelCommands( this );

    if ( iDeck )

        {

        iDeck->RemoveAndDestroyAllD();

        }

    delete iBackGroundVisual;

    delete iThumbVisual;

    }

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

// CUiCScrollBar::CUiCScrollBar

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

//

CUiCScrollBar::CUiCScrollBar()

    {

    FUNC_LOG;

    }

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

// CUiCScrollBar::ConstructL

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

//

void CUiCScrollBar::ConstructL( CAlfEnv& aEnv, CAlfLayout* aParentLayout )

    {

    FUNC_LOG;

    CAlfControl::ConstructL( aEnv );

    iDeck = CAlfDeckLayout::AddNewL( *this, aParentLayout );

    iDeck->SetFlags( EAlfVisualFlagManualLayout |

            EAlfVisualFlagAutomaticLocaleMirroringEnabled );

    iBgLayout = CAlfAnchorLayout::AddNewL( *this, iDeck );

    iBgLayout->SetFlags( EAlfVisualFlagAutomaticLocaleMirroringEnabled );

    iBackGroundVisual = CUiCCompositeImage::NewL( *this, iBgLayout,

            Env().TextureManager().CreateTextureL( EBackgroundTop, this, EAlfTextureFlagSkinContent ),

            Env().TextureManager().CreateTextureL( EBackgroundMiddle, this, EAlfTextureFlagSkinContent ),

            Env().TextureManager().CreateTextureL( EBackgroundBottom, this, EAlfTextureFlagSkinContent ) );

    iThumbLayout = CAlfAnchorLayout::AddNewL( *this, iDeck );

    iThumbLayout->SetFlags( EAlfVisualFlagAutomaticLocaleMirroringEnabled );

    iThumbLayout->SetClipping( ETrue );

    iThumbVisual = CUiCCompositeImage::NewL( *this, iThumbLayout,

            Env().TextureManager().CreateTextureL( EThumbTop, this, EAlfTextureFlagSkinContent ),

            Env().TextureManager().CreateTextureL( EThumbMiddle, this, EAlfTextureFlagSkinContent ),

            Env().TextureManager().CreateTextureL( EThumbBottom, this, EAlfTextureFlagSkinContent ) );

    iThumbVisual->Layout().SetFlags( EAlfVisualFlagDrawAfterOthers );

    SetAnchors();

    }

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

// CUiCScrollBar::ConstructL

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

//

void CUiCScrollBar::SetAnchors()

    {

    FUNC_LOG;

    SetBgAnchors();

    SetThumbAnchors();

    }

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

// CUiCScrollBar::SetBgAnchors

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

//

void CUiCScrollBar::SetBgAnchors()

    {

    FUNC_LOG;

    iBgLayout->SetAnchor(

            EAlfAnchorTopLeft, 0,

            EAlfAnchorOriginRight, EAlfAnchorOriginTop,

            EAlfAnchorMetricAbsolute, EAlfAnchorMetricAbsolute,

            TAlfTimedPoint( -KScrollBarWidth, 0 ) );

    iBgLayout->SetAnchor(

            EAlfAnchorBottomRight, 0,

            EAlfAnchorOriginRight, EAlfAnchorOriginBottom,

            EAlfAnchorMetricAbsolute, EAlfAnchorMetricAbsolute,

            TAlfTimedPoint( 0, 0 ) );

    iBgLayout->UpdateChildrenLayout();

    }

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

// CUiCScrollBar::SetThumbAnchors

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

//

void CUiCScrollBar::SetThumbAnchors()

    {

    FUNC_LOG;

    iThumbLayout->SetAnchor(

            EAlfAnchorTopLeft, 0,

            EAlfAnchorOriginRight, EAlfAnchorOriginTop,

            EAlfAnchorMetricAbsolute, EAlfAnchorMetricAbsolute,

            TAlfTimedPoint( -KScrollBarWidth, iModel.ThumbPosition() ) );

    iThumbLayout->SetAnchor(

            EAlfAnchorBottomRight, 0,

            EAlfAnchorOriginRight, EAlfAnchorOriginTop,

            EAlfAnchorMetricAbsolute, EAlfAnchorMetricAbsolute,

            TAlfTimedPoint( 0, iModel.ThumbPosition() + iModel.ThumbHeight() ) );

    iThumbLayout->UpdateChildrenLayout();

    }

// end of file