/*

* Copyright (c) 2007-2009 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:  Class for showing the EV slider*

*/

// INCLUDE FILES

#include "CamCaptureSetupSlider.h"

#include "CamPanic.h"    // Panic codes

#include "CamUtility.h"

#include "CamAppUi.h"

#include "CamPSI.h"

#include "camconfiguration.h"

#include "CameraUiConfigManager.h"

#include <e32base.h>

#include <e32std.h>

#include <coemain.h>

#include <eikenv.h>

#include <cameraapp.mbg>

#include <eikappui.h>    // For CCoeAppUiBase

#include <eikapp.h>      // For CEikApplication

#include <barsread.h>    // resource reader

#include <AknIconUtils.h>

#include <AknsDrawUtils.h>

#include <touchfeedback.h> 

#include <cameraapp.rsg>

#include <vgacamsettings.rsg>

#include <aknlayoutscalable_apps.cdl.h>

// EXTERNAL DATA STRUCTURES

// EXTERNAL FUNCTION PROTOTYPES  

// CONSTANTS

const TInt KDivisorFactor = 1024; // Avoids using TReal maths, use factor of 2

// Contrast slider value indexes

const TInt KContrastPlusInd = 0;

const TInt KContrastMinusInd = 1;

const TInt KContrastIconInd = 2;

// EV slider value indexes

const TInt KEVPlus20Ind = 0;

const TInt KEVPlus15Ind = 1;

const TInt KEVPlus10Ind = 2;

const TInt KEVPlus05Ind = 3;

const TInt KEV0Ind = 4;

const TInt KEVMinus05Ind = 5;

const TInt KEVMinus10Ind = 6;

const TInt KEVMinus15Ind = 7;

const TInt KEVMinus20Ind = 8;

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

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

// CCamSliderLegend::~CCamSliderLegend

// destructor 

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

//

CCamSliderLegend::~CCamSliderLegend()

  {

  PRINT( _L("Camera => ~CCamSliderLegend") );

  delete iText;

  delete iBitmap;

  delete iMask;

  PRINT( _L("Camera <= ~CCamSliderLegend") );

  }

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

// CCamSliderLegend::Draw

// Draws the legend 

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

//

void CCamSliderLegend::Draw( CWindowGc& aGc ) const

    {

    if ( iItem == ECamSliderLegendItemText )

        {

        TRgb color;

        MAknsSkinInstance* skin = AknsUtils::SkinInstance();

        AknsUtils::GetCachedColor( skin, color, KAknsIIDQsnTextColors,

                                                EAknsCIQsnTextColorsCG6 );

        iPosition.DrawText( aGc, iText->Des(), ETrue, color );

        }

    else

        {

        iIconRect.DrawImage( aGc, iBitmap, iMask );

        }

    }

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

// CCamSliderLegend::Rect

// Returns the legend rect 

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

//

TRect CCamSliderLegend::Rect() const

    {

    if ( iItem == ECamSliderLegendItemText )

        {

        return iPosition.TextRect();

        }

    else

        {

        return iIconRect.Rect();

        }

    }

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

// CCamSliderLegend::ConstructTextL

// Constructs a text element from resources with given layout

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

//

void CCamSliderLegend::ConstructTextL(

        TResourceReader& aReader,

        const TRect& aRect,

        const TAknTextComponentLayout& aLayout )

    {      

	iItem = static_cast<TCamSliderLegendItem>( aReader.ReadInt16() );

	if ( iItem == ECamSliderLegendItemText )

		{ // must be a text	

		iPosition.LayoutText( aRect, aLayout );

		iText = aReader.ReadHBufC16L();

        aReader.ReadInt32(); // bitmap

        aReader.ReadInt32(); // mask

		}

    }

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

// CCamSliderLegend::ConstructIconL

// Constructs an icon from resources with given layout

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

//

void CCamSliderLegend::ConstructIconL(

        TResourceReader& aReader,

        const TRect& aRect,

        const TAknWindowComponentLayout& aLayout )

    {      

	iItem = static_cast<TCamSliderLegendItem>( aReader.ReadInt16() );

	if ( iItem == ECamSliderLegendItemIcon )

	    { // must be an icon	

		iIconRect.LayoutRect( aRect, aLayout );

		iText = aReader.ReadHBufC16L();

		TInt bitmap = aReader.ReadInt32();

		TInt mask = aReader.ReadInt32();

		// Create component bitmaps 

        TFileName resFileName;

        CamUtility::ResourceFileName( resFileName );

        TPtrC resname = resFileName;

		AknIconUtils::CreateIconL( iBitmap, iMask, resname, bitmap, mask );

        AknIconUtils::SetSize( iBitmap, iIconRect.Rect().Size() );

		}

    }

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

// CCamCaptureSetupSlider::CCamCaptureSetupSlider

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

// might leave.

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

//

CCamCaptureSetupSlider::CCamCaptureSetupSlider( MCamSettingValueObserver* aObserver,

                                                TCamSettingItemIds aSettingType,

                                                TInt aSteps ) 

: iSettingObserver( aObserver ), iSettingType( aSettingType ), iSteps( aSteps )

    {

    }

/*

 * CCamCaptureSetupSlider::InitializeSliderValuesL

 */

void CCamCaptureSetupSlider::InitializeSliderValuesL()

    {

    CCameraUiConfigManager* configManager = static_cast<CCamAppUi*>

                           ( iCoeEnv->AppUi() )->AppController().UiConfigManagerPtr();

    TBool configureRunTime = EFalse;

    RArray<TInt> range;

    CleanupClosePushL( range );

    switch ( iSettingType )

        {

        case ECamSettingItemDynamicPhotoBrightness:

        case ECamSettingItemDynamicVideoBrightness:

        case ECamSettingItemUserSceneBrightness:

            {

            if ( configManager && configManager->IsBrightnessSupported() )

                {

                configManager->SupportedBrightnessRangeL( range );

                configureRunTime = ETrue;

                }

            break;

            }

        case ECamSettingItemDynamicPhotoContrast:

        case ECamSettingItemDynamicVideoContrast:

        case ECamSettingItemUserSceneContrast:

            {

            if ( configManager && configManager->IsContrastSupported() )

                {

                configManager->SupportedContrastRangeL( range );

                configureRunTime = ETrue;

                }           

            }

            break;

        case ECamSettingItemDynamicPhotoExposure:

        case ECamSettingItemDynamicVideoExposure:

        case ECamSettingItemUserSceneExposure:

            {

            // get range of EV values from product specific utility

            TCamEvCompRange evRange = 

                static_cast<CCamAppUi*>(

                        iCoeEnv->AppUi() )->AppController().EvRange();

            iMaxSliderValue = evRange.iMaxValue * evRange.iStepsPerUnit;

            iMinSliderValue = evRange.iMinValue * evRange.iStepsPerUnit;

            iNumSliderValues = iMaxSliderValue - iMinSliderValue;

            }

            break;

		default:

			{

            }

            break;

        }

    if ( configureRunTime )

        {

        if ( range.Count() > 0 )

            {

            iMinSliderValue = range[0]; //min value

            iMaxSliderValue = range[1]; // max value

            iNumSliderValues = range[range.Count()-1]; // steps

            }

        }

    CleanupStack::PopAndDestroy( &range );

    }

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

// CCamCaptureSetupSlider::ConstructL

// Symbian 2nd phase constructor can leave.

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

//

void CCamCaptureSetupSlider::ConstructL( const CCoeControl* aParent )

    {

    __ASSERT_DEBUG( aParent!=NULL, CamPanic( ECamPanicNullPointer ) );

    InitializeSliderValuesL();

    iParentControl = aParent;

    SetContainerWindowL( *iParentControl );  

    TFileName resFileName;

    CamUtility::ResourceFileName( resFileName );

    TPtrC resname = resFileName;

    // Create component bitmaps 

    AknIconUtils::CreateIconL( iBitmapShaft, 

                               iBitmapShaftMask, 

                               resname, 

                               EMbmCameraappQgn_graf_nslider_cam4_empty,

                               EMbmCameraappQgn_graf_nslider_cam4_empty_mask );

    AknIconUtils::CreateIconL( iBitmapThumb, 

                               iBitmapThumbMask, 

                               resname, 

                               EMbmCameraappQgn_graf_nslider_cam4_marker,

                               EMbmCameraappQgn_graf_nslider_cam4_marker_mask );

    AknIconUtils::CreateIconL( iBitmapThumbSelected, 

                               iBitmapThumbSelectedMask, 

                               resname, 

                               EMbmCameraappQgn_graf_nslider_cam4_marker_selected,

                               EMbmCameraappQgn_graf_nslider_cam4_marker_selected_mask );

    iBitmapThumbCurrent = iBitmapThumb;

    iBitmapThumbCurrentMask = iBitmapThumbMask;

    }

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

// CCamCaptureSetupSlider::NewL

// Two-phased constructor.

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

//

CCamCaptureSetupSlider* CCamCaptureSetupSlider::NewL( const CCoeControl* aParent, 

                                                      MCamSettingValueObserver* aObserver,

                                                      TCamSettingItemIds aSettingItem,

                                                      TInt aSteps )

    {

    CCamCaptureSetupSlider* self = 

        new( ELeave ) CCamCaptureSetupSlider( aObserver, aSettingItem, aSteps );

    CleanupStack::PushL( self );

    self->ConstructL( aParent );

    CleanupStack::Pop( self );

    return self;

    }

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

// CCamCaptureSetupSlider::~CCamCaptureSetupSlider

// Destructor

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

//    

CCamCaptureSetupSlider::~CCamCaptureSetupSlider()

  {

  PRINT( _L("Camera => ~CCamCaptureSetupSlider") );

  // Destroy legend strings

  iLegendArray.ResetAndDestroy();

  delete iBitmapShaft;

  delete iBitmapShaftMask;

  delete iBitmapThumb;

  delete iBitmapThumbMask;

  delete iBitmapThumbSelected;

  delete iBitmapThumbSelectedMask;

  PRINT( _L("Camera <= ~CCamCaptureSetupSlider") );

  }

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

// CCamCaptureSetupSlider::InitializeL

// Sets up the slider with the initial value

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

//

void CCamCaptureSetupSlider::InitializeL( TInt aValue )

    {

    // Check the initial value is valid.  If no, leave.

    if ( aValue < iMinSliderValue ||

         aValue > iMaxSliderValue )

        {

        User::Leave( KErrArgument );

        }

    iValue = aValue;

    }

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

// CCamCaptureSetupSlider::MinValue

// Returns the minimum slider value

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

//

TInt CCamCaptureSetupSlider::MinValue() const

    {

    return iMinSliderValue;

    }

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

// CCamCaptureSetupSlider::MaxValue

// Returns the maximum slider value

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

//

TInt CCamCaptureSetupSlider::MaxValue() const

    {

    return iMaxSliderValue;

    }

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

// CCamCaptureSetupSlider::SetRange

// Sets the minimum and maximum values of the slider control

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

//

void CCamCaptureSetupSlider::SetRange( TInt aMin, TInt aMax ) 

    {

    ASSERT( aMin < aMax );

    iMinSliderValue = aMin;

    iMaxSliderValue = aMax;    

    iNumSliderValues = iMaxSliderValue;

    }

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

// CCamCaptureSetupSlider::Draw

// Draws the slider 

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

//

void CCamCaptureSetupSlider::Draw( const TRect& /*aRect*/ ) const

    {

    CWindowGc& gc = SystemGc();

    MAknsSkinInstance* skin = AknsUtils::SkinInstance();

    MAknsControlContext *cc = AknsDrawUtils::ControlContext( iParentControl ); 

    AknsDrawUtils::Background( skin, cc, iParentControl, gc, Rect() );

    // STEP 1: Draw the legend text

    TInt count = iLegendArray.Count();

    TInt i = 0;

    for ( i = 0; i < count; i++ )

        {

        iLegendArray[i]->Draw( gc );

        }

    CFbsBitmap* shaft = iBitmapShaft;

    CFbsBitmap* shaftMask = iBitmapShaftMask;

    // Step 2: Draw the shaft bitmap    

    if ( shaft )

        {

        iShaftLayout.DrawImage( gc, shaft, shaftMask );

        }

    // Step 3: Work out the position of the thumb

    TPoint thumbPoint = iThumbPoint;  

    // This is the max bitmap offset from the top of the shaft that the thumb can be

    TInt maxVOffset = iShaftLayout.Rect().Size().iHeight - iBitmapThumb->SizeInPixels().iHeight;

    // This is the no. of pixels for a "step"

    TInt stepInPixels = ( maxVOffset * KDivisorFactor ) / iNumSliderValues;

    // Thumb position = top of shaft + delta

    TInt nbrSteps = iMaxSliderValue - iValue;

    thumbPoint.iY = iShaftLayout.Rect().iTl.iY + stepInPixels *  nbrSteps / KDivisorFactor;

    // Step 4: Blit the thumb bitmap

    gc.BitBltMasked( thumbPoint, iBitmapThumbCurrent, iBitmapThumb->SizeInPixels(), iBitmapThumbCurrentMask, ETrue );

    }

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

// CCamCaptureSetupSlider::SizeChanged

// Calculates the new minimum size

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

//

void CCamCaptureSetupSlider::SizeChanged()

    {        

    TRAPD( ignore, ReadLayoutL() );

    if ( ignore )

        { 

        // Do nothing ( removes build warning )

        }                 

    // Work out the minimum size

    TInt count = iLegendArray.Count();

    TRect minimumRect;

    // Start min rect as first legend text

    if ( count > 0 )

        {

        minimumRect = iLegendArray[0]->Rect();

        }

    // Take into account the other legend texts

    TInt i;

    for ( i = 1; i < count; i++ )

        {            

        minimumRect.BoundingRect( iLegendArray[i]->Rect() );

        }

    // Take into account the shaft bitmap

    minimumRect.BoundingRect( iShaftLayout.Rect() );

    iMinimumSize = minimumRect.Size();

    }   

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

// CCamCaptureSetupSlider::OfferKeyEventL

// Allows the user to change the current EV value via key presses.

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

//

TKeyResponse CCamCaptureSetupSlider::OfferKeyEventL( const TKeyEvent& aKeyEvent, TEventCode aType )

    {

    PRINT( _L("CCamCaptureSetupSlider::OfferKeyEventL") );

    if ( aType == EEventKey )

        {

        if ( aKeyEvent.iScanCode == EStdKeyUpArrow ) 

            {

            if ( iValue <  iMaxSliderValue )

                {

                iValue ++;

                iSettingObserver->HandleSettingValueUpdateL( iValue );  // Tell observer about change

                DrawNow();

                }

            return EKeyWasConsumed;

            }

        else if ( aKeyEvent.iScanCode == EStdKeyDownArrow ) 

            {

            if ( iValue > iMinSliderValue )

                {

                iValue --;

                iSettingObserver->HandleSettingValueUpdateL( iValue );  // Tell observer about change

                DrawNow();

                }

            return EKeyWasConsumed;

            }

        else if ( aKeyEvent.iCode == EKeyOK && aKeyEvent.iRepeats == 0 )

            {

            return EKeyWasConsumed;

            }

        // otherwise, do nothing

        else

            {

            // empty statement to remove Lint error

            }

        }

    return EKeyWasNotConsumed;

    }

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

// CCamCaptureSetupSlider::MinimumSize

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

//

TSize CCamCaptureSetupSlider::MinimumSize()

    {

    TSize zerosize = TSize( 0, 0 );