1 

     2 

     3 /*

     4 * Copyright (c) 2006 Nokia Corporation and/or its subsidiary(-ies).

     5 * All rights reserved.

     6 * This component and the accompanying materials are made available

     7 * under the terms of "Eclipse Public License v1.0"

     8 * which accompanies this distribution, and is available

     9 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

    10 *

    11 * Initial Contributors:

    12 * Nokia Corporation - initial contribution.

    13 *

    14 * Contributors:

    15 *

    16 * Description:  Thumbnail loader

    17 *

    18 */

    19 

    20 #ifndef MPXCOLLECTIONVIEWHGTNLOADER_H_

    21 #define MPXCOLLECTIONVIEWHGTNLOADER_H_

    22 

    23 #include <e32base.h>

    24 #include <thumbnailmanager.h> // needs to be included here because of a bug in thumbnailmanagerobserver.h

    25 #include <thumbnailmanagerobserver.h>

    26 

    27 class CThumbnailManager;

    28 class CFbsBitmap;

    29 class CAsyncCallBack;

    30 

    31 /**

    32  * Observer iface

    33  */

    34 class MMpxTNLoaderObserver

    35     {

    36 public:

    37     virtual void TNReadyL(TInt aError, CFbsBitmap* aBitmap, CFbsBitmap* aMask, TInt aIndex) = 0;

    38     };

    39 

    40 /**

    41  * TN Loader

    42  */

    43 NONSHARABLE_CLASS( CMpxTNLoader ) : public CBase, public MThumbnailManagerObserver

    44     {

    45 public: // CONSTRUCTORS & DESCTRUCTOR

    46 

    47     static CMpxTNLoader* NewL(MMpxTNLoaderObserver& aObserver, TThumbnailSize aSize );

    48     virtual ~CMpxTNLoader();

    49 

    50 public: // NEW FUNCTIONS

    51 

    52     void LoadThumbL(TInt aIndex, const TDesC& aFileName );

    53     void CancelThumb( TInt aIndex );

    54     void CancelAll();

    55     void SetSizeL( TThumbnailSize aSize );

    56 

    57 private: // From MThumbnailManagerObserver

    58 

    59     void ThumbnailPreviewReady( MThumbnailData& aThumbnail,

    60         TThumbnailRequestId aId );

    61     void ThumbnailReady( TInt aError, MThumbnailData& aThumbnail,

    62         TThumbnailRequestId aId );

    63 

    64 private: // CONSTRUCTORS

    65 

    66     CMpxTNLoader(MMpxTNLoaderObserver& aObserver,

    67             TThumbnailSize aSize );

    68     void ConstructL();

    69 

    70 private: // NEW FUNCTIONS

    71 

    72     TInt FindLoadingById(TThumbnailRequestId aId, TBool aRemove = EFalse);

    73     TInt FindLoadingByIndex(TInt aIndex, TBool aRemove = EFalse);

    74     static TInt LoadThumbnail( TAny* aSelf );

    75     void LoadNextTN();

    76 

    77 private: // DATA

    78 

    79     MMpxTNLoaderObserver& iObserver;

    80     CThumbnailManager* iTnEngine; // Own

    81 

    82     // Loading information

    83     class TLoadingTN

    84         {

    85     public:

    86         TLoadingTN(TThumbnailRequestId aId, TInt aIndex, const TDesC& aFileName )

    87         : iId(aId), iIndex(aIndex), iFileName( aFileName )

    88             {

    89             }

    90 

    91         TThumbnailRequestId iId;

    92         TInt iIndex;

    93         TFileName iFileName;

    94         };

    95 

    96     RPointerArray<TLoadingTN> iLoading; // Loading Thubmbs

    97     CAsyncCallBack* iAsyncCallBack;

    98     TThumbnailSize iSize;

    99     };

   100 

   101 #endif // MPXCOLLECTIONVIEWHGTNLOADER_H_