/*
* Copyright (c) 2006 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: Thumbnail loader
*
*/
#ifndef MPXCOLLECTIONVIEWHGTNLOADER_H_
#define MPXCOLLECTIONVIEWHGTNLOADER_H_
#include <e32base.h>
#include <thumbnailmanager.h> // needs to be included here because of a bug in thumbnailmanagerobserver.h
#include <thumbnailmanagerobserver.h>
class CThumbnailManager;
class CFbsBitmap;
class CAsyncCallBack;
/**
* Observer iface
*/
class MMpxTNLoaderObserver
{
public:
virtual void TNReadyL(TInt aError, CFbsBitmap* aBitmap, CFbsBitmap* aMask, TInt aIndex) = 0;
};
/**
* TN Loader
*/
NONSHARABLE_CLASS( CMpxTNLoader ) : public CBase, public MThumbnailManagerObserver
{
public: // CONSTRUCTORS & DESCTRUCTOR
static CMpxTNLoader* NewL(MMpxTNLoaderObserver& aObserver, TThumbnailSize aSize );
virtual ~CMpxTNLoader();
public: // NEW FUNCTIONS
void LoadThumbL(TInt aIndex, const TDesC& aFileName );
void CancelThumb( TInt aIndex );
void CancelAll();
void SetSizeL( TThumbnailSize aSize );
void Pause( TTimeIntervalMicroSeconds32 aDelay );
void Resume();
private: // From MThumbnailManagerObserver
void ThumbnailPreviewReady( MThumbnailData& aThumbnail,
TThumbnailRequestId aId );
void ThumbnailReady( TInt aError, MThumbnailData& aThumbnail,
TThumbnailRequestId aId );
private: // CONSTRUCTORS
CMpxTNLoader(MMpxTNLoaderObserver& aObserver,
TThumbnailSize aSize );
void ConstructL();
private: // NEW FUNCTIONS
TInt FindLoadingById(TThumbnailRequestId aId, TBool aRemove = EFalse);
TInt FindLoadingByIndex(TInt aIndex, TBool aRemove = EFalse);
static TInt LoadThumbnail( TAny* aSelf );
void LoadNextTN();
static TInt ResumeCallback(TAny* aPtr);
private: // DATA
MMpxTNLoaderObserver& iObserver;
CThumbnailManager* iTnEngine; // Own
// Loading information
class TLoadingTN
{
public:
TLoadingTN(TThumbnailRequestId aId, TInt aIndex, const TDesC& aFileName )
: iId(aId), iIndex(aIndex), iFileName( aFileName )
{
}
TThumbnailRequestId iId;
TInt iIndex;
TFileName iFileName;
};
RPointerArray<TLoadingTN> iLoading; // Loading Thubmbs
CAsyncCallBack* iAsyncCallBack;
TThumbnailSize iSize;
TBool iPaused;
CPeriodic* iPauseTimer;
};
#endif // MPXCOLLECTIONVIEWHGTNLOADER_H_