/*

* 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:  Utility class to rotate bitmaps*

*/

// INCLUDE FILES

#include <e32base.h>

#include <e32std.h>

#include "CamBmpRotatorAo.h"

#include "camlogging.h"

// CONSTANTS

// MACROS

// LOCAL CONSTANTS AND MACROS

// MODULE DATA STRUCTURES

// LOCAL FUNCTION PROTOTYPES

// FORWARD DECLARATIONS

// ============================= LOCAL FUNCTIONS ===============================

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

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

// CCamBmpRotatorAo::CCamBmpRotatorAo

// C++ constructor

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

//

CCamBmpRotatorAo::CCamBmpRotatorAo() : CActive( EPriorityHigh )

    {    

    }

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

// CCamBmpRotatorAo::ConstructL

// Second phase constructor.

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

//

void CCamBmpRotatorAo::ConstructL()

    {    

    iRotator = CBitmapRotator::NewL();

    CActiveScheduler::Add( this );

    }

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

// CCamBmpRotatorAo::NewL

// Two-phased constructor.

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

//

CCamBmpRotatorAo* CCamBmpRotatorAo::NewL()

    {

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

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop( self );

    return self;

    }

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

// CCamBmpRotatorAo::~CCamBmpRotatorAo()

// Destructor

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

//

CCamBmpRotatorAo::~CCamBmpRotatorAo()

  {

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

  if ( IsActive() )

    {

    Cancel();

    }

  delete iRotator;

  iQueue.ResetAndDestroy();

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

  }

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

// CCamBmpRotatorAo::AddToQueueL

// Adds the specified bitmap/rotator to the queue of items to be rotated

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

//

void CCamBmpRotatorAo::AddToQueueL( CFbsBitmap* aBitmap, CBitmapRotator::TRotationAngle aAngle )

    {

    CRotateTask* task = new ( ELeave ) CRotateTask;

    CleanupStack::PushL( task );

    task->iBitmap = aBitmap;

    task->iAngle = aAngle;

    User::LeaveIfError( iQueue.Append( task ) );        

    CleanupStack::Pop( task );

    }

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

// CCamBmpRotatorAo::RunL

// Called when a rotation operation is completed (or cancelled)

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

//

void CCamBmpRotatorAo::RunL()

    {

    // Pop the completed image from the queue.

    CRotateTask* task = iQueue[0];    

    iQueue.Remove( 0 );    

    delete task;  // NOTE: no need to delete bitmap (as not owned)

    // If rotate completed successfully...

    // ... and there are more left on the queue...

    // ... then start the next rotate

    if ( iStatus.Int() == KErrNone )

        {

        if ( iQueue.Count() > 0 )

            {

            StartNextRotate();

            }    

        }

    else 

        {

        // Rotation failed; cancel further rotation attempts in 

        // the queue

        iQueue.ResetAndDestroy();

        }

    }

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

// CCamBmpRotatorAo::DoCancel

// Called to cancel an outstanding rotation operation

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

//

void CCamBmpRotatorAo::DoCancel()

    {

    iRotator->Cancel();

    }

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

// CCamBmpRotatorAo::StartNextRotate

// Called to start the next queued rotation task.  If no tasks are queued, does nothing

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

//

void CCamBmpRotatorAo::StartNextRotate()

    {

    if ( iQueue.Count() == 0 )

        return;

    CRotateTask* task = iQueue[0];

    iRotator->Rotate( &iStatus, *task->iBitmap, task->iAngle );

    SetActive();

    }

//  End of File