mpxplugins/viewplugins/views/collectionviewhg/src/mpxcollectionviewhgtnloader.cpp
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     1 /*
       
     2 * Copyright (c) 2006 Nokia Corporation and/or its subsidiary(-ies).
       
     3 * All rights reserved.
       
     4 * This component and the accompanying materials are made available
       
     5 * under the terms of "Eclipse Public License v1.0"
       
     6 * which accompanies this distribution, and is available
       
     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".
       
     8 *
       
     9 * Initial Contributors:
       
    10 * Nokia Corporation - initial contribution.
       
    11 *
       
    12 * Contributors:
       
    13 *
       
    14 * Description:  Thumbnail loader implementation
       
    15 *
       
    16 */
       
    17 
       
    18 
       
    19 #include <thumbnaildata.h>
       
    20 #include <AknIconUtils.h>
       
    21 #include "mpxcollectionviewhgtnloader.h"
       
    22 #include "mpxlog.h"
       
    23 
       
    24 _LIT( KMPXAlbumMimeType, "audio/mpeg3" );
       
    25 
       
    26 
       
    27 // -----------------------------------------------------------------------------
       
    28 // CODEScrollerTNLoader::NewL()
       
    29 // -----------------------------------------------------------------------------
       
    30 //
       
    31 CMpxTNLoader* CMpxTNLoader::NewL (
       
    32         MMpxTNLoaderObserver& aObserver, TThumbnailSize aSize )
       
    33     {
       
    34     CMpxTNLoader* self = new (ELeave) CMpxTNLoader(aObserver, aSize );
       
    35     CleanupStack::PushL(self);
       
    36     self->ConstructL();
       
    37     CleanupStack::Pop(self);
       
    38     return self;
       
    39     }
       
    40 
       
    41 // -----------------------------------------------------------------------------
       
    42 // CMpxTNLoader:~CMpxTNLoader()
       
    43 // -----------------------------------------------------------------------------
       
    44 //
       
    45 CMpxTNLoader::~CMpxTNLoader ( )
       
    46     {
       
    47     // cancel outstanding requests
       
    48     if(iTnEngine)
       
    49         {
       
    50 //        CancelAll();
       
    51         }
       
    52 
       
    53     iLoading.ResetAndDestroy();
       
    54     delete iTnEngine;
       
    55 
       
    56     if( iAsyncCallBack )
       
    57         iAsyncCallBack->Cancel();
       
    58 
       
    59     delete iAsyncCallBack;
       
    60     }
       
    61 
       
    62 TInt CMpxTNLoader::LoadThumbnail( TAny* aSelf )
       
    63     {
       
    64     CMpxTNLoader* self = (CMpxTNLoader*)aSelf;
       
    65     self->LoadNextTN();
       
    66     return KErrNone;
       
    67     }
       
    68 
       
    69 void CMpxTNLoader::LoadNextTN()
       
    70     {
       
    71     if( iLoading.Count() > 0 )
       
    72         {
       
    73         TInt index = iLoading[0]->iIndex;
       
    74         if( index >= 0 && iLoading[0]->iId == 0)
       
    75             {
       
    76             CThumbnailObjectSource* source = CThumbnailObjectSource::NewLC(iLoading[0]->iFileName, KMPXAlbumMimeType);
       
    77             TRAPD(err, iLoading[0]->iId = iTnEngine->GetThumbnailL( *source, NULL, 0 ); )
       
    78         	MPX_DEBUG4( "GetThumbnailL: %d [%d,%d]", err, index, iLoading[0]->iId);
       
    79 			CleanupStack::PopAndDestroy(source);
       
    80             }
       
    81         }
       
    82     }
       
    83 
       
    84 // -----------------------------------------------------------------------------
       
    85 // CMpxTNLoader::ThumbnailPreviewReady()
       
    86 // -----------------------------------------------------------------------------
       
    87 //
       
    88 void CMpxTNLoader::ThumbnailPreviewReady (MThumbnailData& /*aThumbnail*/,
       
    89         TThumbnailRequestId /*aId*/ )
       
    90     {
       
    91     // Previews not currently used
       
    92     }
       
    93 
       
    94 // -----------------------------------------------------------------------------
       
    95 // CMpxTNLoader::ThumbnailReady()
       
    96 // -----------------------------------------------------------------------------
       
    97 //
       
    98 void CMpxTNLoader::ThumbnailReady (TInt aError,
       
    99         MThumbnailData& aThumbnail, TThumbnailRequestId aId )
       
   100     {
       
   101     TInt index = FindLoadingById(aId, ETrue);
       
   102 	MPX_DEBUG4( "ThumbnailReady: %d [%d,%d]", aError, index, aId );
       
   103 
       
   104     if( index != KErrNotFound )
       
   105         {
       
   106         CFbsBitmap* bitmap = (aError == KErrNone ? aThumbnail.DetachBitmap() : NULL);
       
   107 
       
   108         TRAP_IGNORE(iObserver.TNReadyL(aError, bitmap, NULL, index));
       
   109 
       
   110         if( iLoading.Count() > 0 )
       
   111             {
       
   112             if(!iAsyncCallBack->IsActive())
       
   113                 iAsyncCallBack->CallBack();
       
   114             }
       
   115         }
       
   116     }
       
   117 
       
   118 // -----------------------------------------------------------------------------
       
   119 // CMpxTNLoader::CMpxTNLoader()
       
   120 // -----------------------------------------------------------------------------
       
   121 //
       
   122 CMpxTNLoader::CMpxTNLoader (MMpxTNLoaderObserver& aObserver, TThumbnailSize aSize )
       
   123 : iObserver( aObserver ), iSize(aSize)
       
   124     {
       
   125 
       
   126     }
       
   127 
       
   128 // -----------------------------------------------------------------------------
       
   129 // CMpxTNLoader::ConstructL()
       
   130 // -----------------------------------------------------------------------------
       
   131 //
       
   132 void CMpxTNLoader::ConstructL ()
       
   133     {
       
   134     iTnEngine = CThumbnailManager::NewL( *this );
       
   135     iTnEngine->SetFlagsL( CThumbnailManager::EDefaultFlags );
       
   136     iTnEngine->SetQualityPreferenceL( CThumbnailManager::EOptimizeForQuality );
       
   137     iTnEngine->SetThumbnailSizeL( iSize );
       
   138     TCallBack callback(CMpxTNLoader::LoadThumbnail, this);
       
   139     iAsyncCallBack = new (ELeave) CAsyncCallBack( CActive::EPriorityStandard );
       
   140     iAsyncCallBack->Set(callback);
       
   141     }
       
   142 
       
   143 // -----------------------------------------------------------------------------
       
   144 // CMpxTNLoader::FindLoading()
       
   145 // -----------------------------------------------------------------------------
       
   146 //
       
   147 TInt CMpxTNLoader::FindLoadingById(TThumbnailRequestId aId, TBool aRemove)
       
   148     {
       
   149     TInt index = KErrNotFound;
       
   150     for(TInt i = 0; i < iLoading.Count(); ++i)
       
   151         {
       
   152         if(iLoading[i]->iId == aId)
       
   153             {
       
   154             index = iLoading[i]->iIndex;
       
   155             if(aRemove)
       
   156                 {
       
   157                 delete iLoading[i];
       
   158                 iLoading.Remove(i);
       
   159                 }
       
   160             break;
       
   161             }
       
   162         }
       
   163     return index;
       
   164     }
       
   165 
       
   166 // -----------------------------------------------------------------------------
       
   167 // CMpxTNLoader::FindLoading()
       
   168 // -----------------------------------------------------------------------------
       
   169 //
       
   170 TInt CMpxTNLoader::FindLoadingByIndex(TInt aIndex, TBool aRemove)
       
   171     {
       
   172     TInt index = KErrNotFound;
       
   173     for(TInt i = 0; i < iLoading.Count(); ++i)
       
   174         {
       
   175         if(iLoading[i]->iIndex == aIndex)
       
   176             {
       
   177             index = i;
       
   178             if(aRemove)
       
   179                 {
       
   180                 delete iLoading[i];
       
   181                 iLoading.Remove(i);
       
   182                 }
       
   183             break;
       
   184             }
       
   185         }
       
   186     return index;
       
   187     }
       
   188 
       
   189 // -----------------------------------------------------------------------------
       
   190 // CMpxTNLoader::LoadThumbL()
       
   191 // -----------------------------------------------------------------------------
       
   192 //
       
   193 void CMpxTNLoader::LoadThumbL( TInt aIndex, const TDesC& aFileName )
       
   194     {
       
   195     if( FindLoadingByIndex(aIndex) == KErrNotFound )
       
   196         {
       
   197         iLoading.Append( new (ELeave) TLoadingTN( 0, aIndex, aFileName ) );
       
   198         if( !iAsyncCallBack->IsActive() )
       
   199             iAsyncCallBack->CallBack();
       
   200         }
       
   201     }
       
   202 
       
   203 // -----------------------------------------------------------------------------
       
   204 // CMpxTNLoader::CancelThumb()
       
   205 // -----------------------------------------------------------------------------
       
   206 //
       
   207 void CMpxTNLoader::CancelThumb( TInt aIndex )
       
   208     {
       
   209     TInt loadingIndex = FindLoadingByIndex( aIndex );
       
   210     if(loadingIndex != KErrNotFound)
       
   211         {
       
   212         // Current thumbnail manager has bugs in thumbnail request cancelation.
       
   213         // There is a fix coming in near future but until that we cannot cancel requests
       
   214         // since after that we dont get any thumbnails from server.
       
   215 //        if( iLoading[loadingIndex]->iId != 0 )
       
   216 //            {
       
   217 //            RDebug::Print(_L("!!CANCEL REQUEST!!"));
       
   218 //            iTnEngine->CancelRequest( iLoading[loadingIndex]->iId );
       
   219 //            }
       
   220         delete iLoading[loadingIndex];
       
   221         iLoading.Remove(loadingIndex);
       
   222         }
       
   223     }
       
   224 
       
   225 void CMpxTNLoader::CancelAll()
       
   226     {
       
   227     iLoading.ResetAndDestroy();
       
   228     return;
       
   229     // Current thumbnail manager has bugs in thumbnail request cancelation.
       
   230     // There is a fix coming in near future but until that we cannot cancel requests
       
   231     // since after that we dont get any thumbnails from server.
       
   232     while ( iLoading.Count() > 0 )
       
   233         {
       
   234         if( iLoading[0]->iId != 0 )
       
   235             iTnEngine->CancelRequest( iLoading[0]->iId );
       
   236         delete iLoading[0];
       
   237         iLoading.Remove(0);
       
   238         }
       
   239     }
       
   240 
       
   241 void CMpxTNLoader::SetSizeL( TThumbnailSize aSize )
       
   242     {
       
   243     iTnEngine->SetThumbnailSizeL( aSize );
       
   244     }