photosgallery/contentharvesterplugin/src/glxcontentharvesterplugindownloads.cpp
branchRCL_3
changeset 18 bcb43dc84c44
parent 14 ce1c7ad1f18b
child 22 2dac0fdba72b
equal deleted inserted replaced
14:ce1c7ad1f18b 18:bcb43dc84c44
     1 /*
       
     2  * Copyright (c) 2008-2009 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:    Updates CPS storage for downloads collection
       
    15  *
       
    16  */
       
    17 
       
    18 // INCLUDE FILES
       
    19 
       
    20 #include <mmf/common/mmfcontrollerpluginresolver.h>
       
    21 #include <LiwServiceHandler.h>
       
    22 
       
    23 #include <glxuistd.h>
       
    24 #include <glxicons.mbg>   // Glx Icons
       
    25 #include <glxcollectionplugindownloads.hrh>
       
    26 #include <glxthumbnailattributeinfo.h>  // for KGlxMediaIdThumbnail
       
    27 #include <glxattributecontext.h>
       
    28 #include <glxthumbnailcontext.h>
       
    29 #include <glxtracer.h>
       
    30 #include <glxlog.h>         //  For Log
       
    31 #include <mglxmedialist.h>       // for MGlxMediaList
       
    32 #include <glxcollectiongeneraldefs.h>
       
    33 #include <glxgallery.hrh>               // for KGlxGalleryApplicationUid
       
    34 #include <glxmediaid.h>
       
    35 #include <glxerrormanager.h>      
       
    36 
       
    37 #include "glxcontentharvesterplugindownloads.h"
       
    38 #include "glxcontentharvesterplugin.hrh"
       
    39 #include "glxmapconstants.h"
       
    40 
       
    41 
       
    42 
       
    43 
       
    44 // ============================ MEMBER FUNCTIONS ==============================
       
    45 LOCAL_C TInt TimerCallbackL( TAny* aPtr )
       
    46     {
       
    47     TRACER( "CGlxContentHarvesterPluginDownloads::TimerCallbackL" );
       
    48     static_cast<CGlxContentHarvesterPluginDownloads*>(aPtr)->UpdateDataL();
       
    49     return KErrNone;
       
    50     }
       
    51 
       
    52 // ----------------------------------------------------------------------------
       
    53 // Constructor
       
    54 // ----------------------------------------------------------------------------
       
    55 //
       
    56 CGlxContentHarvesterPluginDownloads::CGlxContentHarvesterPluginDownloads(
       
    57         MLiwInterface* aCPSInterface,
       
    58         MGlxContentHarvesterPlugin *aCHplugin )
       
    59 
       
    60     {
       
    61     TRACER( "CGlxContentHarvesterPluginDownloads::CGlxContentHarvesterPluginDownloads" );
       
    62     iCPSInterface = aCPSInterface;
       
    63     SetCHPlugin(aCHplugin);
       
    64     }
       
    65 
       
    66 // ----------------------------------------------------------------------------
       
    67 // Symbian 2nd phase constructor can leave.
       
    68 // ----------------------------------------------------------------------------
       
    69 //
       
    70 void CGlxContentHarvesterPluginDownloads::ConstructL()
       
    71     {
       
    72     TRACER( "CGlxContentHarvesterPluginDownloads::ConstructL" );
       
    73 
       
    74     //Call the base class ConstructL,to create the default thumbnail
       
    75     CGlxContentHarvesterPluginBase::ConstructL(EMbmGlxiconsQgn_prop_image_notcreated);
       
    76     
       
    77     iPeriodic = CPeriodic::NewL( CActive::EPriorityLow );
       
    78    
       
    79     iUriAttributeContext = new (ELeave) CGlxAttributeContext(&iThumbnailIterator); 
       
    80     iThumbnailAttributeContext = new (ELeave) CGlxAttributeContext(&iThumbnailIterator); 
       
    81 
       
    82     //Register/Subscribe with matrix menu for the notifications 
       
    83     GetInterfaceForNotificationL();
       
    84     SetupPublisherL(KItemIndexDownloads);
       
    85     RequestCpsNotificationL(KItemIndexDownloads);
       
    86     HandleStateChangeL(KItemIndexDownloads);
       
    87     }
       
    88 
       
    89 // ----------------------------------------------------------------------------
       
    90 // Two-phased constructor.
       
    91 // ----------------------------------------------------------------------------
       
    92 //
       
    93 CGlxContentHarvesterPluginDownloads* CGlxContentHarvesterPluginDownloads::NewLC( 
       
    94         MLiwInterface* aCPSInterface,
       
    95         MGlxContentHarvesterPlugin *aCHplugin )
       
    96     {
       
    97     TRACER( "CGlxContentHarvesterPluginDownloads::NewL" );
       
    98     CGlxContentHarvesterPluginDownloads* self = new ( ELeave ) CGlxContentHarvesterPluginDownloads( aCPSInterface,aCHplugin );
       
    99     CleanupStack::PushL(self);
       
   100     self->ConstructL();
       
   101     return self;
       
   102     }
       
   103 
       
   104 // ---------------------------------------------------------------------------
       
   105 // Destructor
       
   106 // ---------------------------------------------------------------------------
       
   107 //
       
   108 CGlxContentHarvesterPluginDownloads::~CGlxContentHarvesterPluginDownloads()
       
   109     {
       
   110     TRACER( "CGlxContentHarvesterPluginDownloads::~CGlxContentHarvesterPluginDownloads" );
       
   111 
       
   112     DestroyMedialist();
       
   113     if ( iPeriodic )
       
   114         {
       
   115         iPeriodic->Cancel();
       
   116         }
       
   117     delete iPeriodic;
       
   118 
       
   119     }
       
   120 
       
   121 // ----------------------------------------------------------------------------
       
   122 // CGlxContentHarvesterPluginDownloads::UpdateDataL()
       
   123 // ----------------------------------------------------------------------------
       
   124 //
       
   125 void CGlxContentHarvesterPluginDownloads::UpdateDataL() 
       
   126     {
       
   127     TRACER( "CGlxContentHarvesterPluginDownloads::UpdateDataL" );
       
   128 
       
   129     if (!iMediaList)
       
   130         {
       
   131         return;
       
   132         }
       
   133 
       
   134     if (iMediaList->Count() && iPreviewItemCount.Count())
       
   135         {
       
   136         GLX_LOG_INFO1("CGlxContentHarvesterPluginDownloads::UpdateDataL(),iProgressIndex=%d",iProgressIndex);
       
   137         TInt ret = UpdateItem(iPreviewItemCount[iProgressIndex]);
       
   138         if(ret != KErrNotFound)
       
   139             {
       
   140             //Updates the thumbnail in the collection 
       
   141             UpdateDataInCPSL(ret);
       
   142             }
       
   143         else
       
   144             {
       
   145             UpdateDataInCPSL(GetBitmapHandle());
       
   146             }
       
   147         }
       
   148     else
       
   149         {
       
   150         // Show previous thumbnail until the new thumbnail is
       
   151 		// fecthed.Added this check to avoid flicker
       
   152 		if(iMediaList->Count() == 0)
       
   153 			{
       
   154 			//Don't Show the Thumbnail/Show nothing
       
   155 			GLX_LOG_INFO("CGlxContentHarvesterPluginDownloads::UpdateDataL() --O");
       
   156 			UpdateDataInCPSL(GetBitmapHandle());
       
   157 			}
       
   158         }
       
   159     }
       
   160 
       
   161 // ----------------------------------------------------------------------------
       
   162 // CGlxContentHarvesterPluginDownloads::HandleNotifyL()
       
   163 // ----------------------------------------------------------------------------
       
   164 //
       
   165 TInt CGlxContentHarvesterPluginDownloads::HandleNotifyL(
       
   166         TInt /* aCmdId*/,
       
   167         TInt/* aEventId */,
       
   168         CLiwGenericParamList& /*aEventParamList*/,
       
   169         const CLiwGenericParamList& /*aInParamList*/ )
       
   170     {
       
   171     TRACER( "CGlxContentHarvesterPluginDownloads::HandleNotifyL" );
       
   172     HandleStateChangeL(KItemIndexDownloads);
       
   173     return KErrNone;
       
   174     }
       
   175 
       
   176 // ----------------------------------------------------------------------------
       
   177 // CGlxContentHarvesterPluginDownloads::HandleItemChanged()
       
   178 // ----------------------------------------------------------------------------
       
   179 //
       
   180 void CGlxContentHarvesterPluginDownloads::HandleItemChanged()
       
   181     {
       
   182     TRACER("CGlxContentHarvesterPluginDownloads::HandleItemChanged");
       
   183 
       
   184     iProgressIndex = 0;
       
   185     iPreviewItemCount.Reset();
       
   186 
       
   187     TSize gridIconSize = GetGridIconSize();
       
   188     TMPXAttribute thumbnailAttribute(KGlxMediaIdThumbnail, 
       
   189             GlxFullThumbnailAttributeId( ETrue,  gridIconSize.iWidth, gridIconSize.iHeight ) );
       
   190     if(iMediaList)  
       
   191         {
       
   192 
       
   193         TInt count = iMediaList->Count();
       
   194         GLX_LOG_INFO1("CGlxContentHarvesterPluginDownloads:: HandleItemChanged ,count=%d",count);
       
   195 
       
   196         TBool inFocus = IsFocused();
       
   197         for(TInt aItemIndex = 0; aItemIndex < count; aItemIndex++)
       
   198             {
       
   199             const TGlxMedia& item = iMediaList->Item( aItemIndex );
       
   200             const CGlxThumbnailAttribute* value = item.ThumbnailAttribute( thumbnailAttribute );
       
   201             if (value)
       
   202                 {
       
   203                 iPreviewItemCount.InsertInOrder(aItemIndex);
       
   204                 if(!inFocus)
       
   205                     {
       
   206                     //if the collection is not in Focus,retrive only one thumbnail and break
       
   207                     GLX_LOG_INFO1("CGlxContentHarvesterPluginDownloads::HandleItemChanged,Range=1,aItemIndex=%d",aItemIndex);
       
   208                     break;
       
   209                     }
       
   210                 else if(iPreviewItemCount.Count() == KPreviewThumbnailFetchCount ||
       
   211                         iPreviewItemCount.Count() == count )
       
   212                     {
       
   213                     //if the collection is not in Focus,retrive 15 thumbnail and break
       
   214                     GLX_LOG_INFO1("CGlxContentHarvesterPluginDownloads::HandleItemChanged,Range=15,aItemIndex=%d",aItemIndex);
       
   215                     break;
       
   216                     }
       
   217 
       
   218                 }
       
   219             }
       
   220         }
       
   221     }
       
   222 
       
   223 // ----------------------------------------------------------------------------
       
   224 // CGlxContentHarvesterPluginDownloads::UpdateDataInCPSL()
       
   225 // ----------------------------------------------------------------------------
       
   226 //  
       
   227 void CGlxContentHarvesterPluginDownloads::UpdateDataInCPSL(TInt aHandle) 
       
   228     {
       
   229     TRACER( "CGlxContentHarvesterPluginDownloads::UpdateDataInCPSL" );
       
   230     //update data in CPS
       
   231     _LIT(KExamplePluginPub,"photossuite");
       
   232     _LIT(KContentActivation,"downloads");
       
   233     _LIT(KContId1,"category1");
       
   234 
       
   235     if(iCPSInterface && iMediaList )
       
   236         {
       
   237         CLiwGenericParamList* inParamList = CLiwGenericParamList::NewLC();
       
   238         CLiwGenericParamList* outParamList = CLiwGenericParamList::NewLC();
       
   239 
       
   240         FillInputListWithDataL(inParamList, KExamplePluginPub, KContentActivation , 
       
   241                 KContId1, aHandle);
       
   242 
       
   243         iCPSInterface->ExecuteCmdL( KAdd,  *inParamList, *outParamList );
       
   244         CleanupStack::PopAndDestroy(outParamList);
       
   245         CleanupStack::PopAndDestroy(inParamList);
       
   246         }
       
   247     }
       
   248 
       
   249 // ----------------------------------------------------------------------------
       
   250 // CGlxContentHarvesterPluginDownloads::UpdateItem()
       
   251 // ----------------------------------------------------------------------------
       
   252 //
       
   253 TInt CGlxContentHarvesterPluginDownloads::UpdateItem(TInt aItemIndex)
       
   254     {
       
   255     TRACER( "CGlxContentHarvesterPluginDownloads::UpdateItem" );
       
   256     const TGlxMedia& item = iMediaList->Item(aItemIndex);
       
   257     TSize gridIconSize = GetGridIconSize();
       
   258     TMPXAttribute thumbnailAttribute(KGlxMediaIdThumbnail, 
       
   259             GlxFullThumbnailAttributeId( ETrue,  gridIconSize.iWidth, gridIconSize.iHeight ) );
       
   260     GLX_LOG_INFO1("CGlxContentHarvesterPluginDownloads::UpdateItem,aItemIndex=%d ",aItemIndex);
       
   261     const CGlxThumbnailAttribute* value = item.ThumbnailAttribute( thumbnailAttribute );
       
   262     if (value)
       
   263         {
       
   264         GLX_LOG_INFO1("CGlxContentHarvesterPluginDownloads::UpdateItem,iProgressIndex=%d ",iProgressIndex);
       
   265         iProgressIndex++;
       
   266         if (iProgressIndex >= KPreviewThumbnailFetchCount || 
       
   267                 iProgressIndex >= iPreviewItemCount.Count() ||
       
   268                 iProgressIndex >= iMediaList->Count())
       
   269             {
       
   270             iProgressIndex = 0;
       
   271             }
       
   272         return value->iBitmap->Handle();
       
   273         }
       
   274     return KErrNotFound;
       
   275     }
       
   276 
       
   277 // ----------------------------------------------------------------------------
       
   278 // CGlxContentHarvesterPluginDownloads::ActivateL()
       
   279 // ----------------------------------------------------------------------------
       
   280 //
       
   281 void CGlxContentHarvesterPluginDownloads::ActivateL( TBool aOn )
       
   282     {
       
   283     TRACER( "CGlxContentHarvesterPluginDownloads::ActivateL" );
       
   284 
       
   285     GLX_LOG_INFO1("CGlxContentHarvesterPluginDownloads::ActivateL aOn =%d",aOn);
       
   286     SetFocus(aOn);
       
   287 
       
   288     if (IsMatrixMenuInForegroundL() && aOn && !iPeriodic->IsActive() )
       
   289         {
       
   290 
       
   291         if(GetCHPlugin()->IsRefreshNeeded())
       
   292             {
       
   293             //Update the rest of all the collections on receving the focus...
       
   294             GetCHPlugin()->UpdatePlugins(aOn);          
       
   295             }
       
   296         else
       
   297             {
       
   298             //As the collection is not updated by the contentharvester plugin
       
   299             //to update the thumbnails on the focus , need to call the below function
       
   300             UpdatePreviewThumbnailListL();
       
   301             }
       
   302 
       
   303         iPeriodic->Start( KTimerInterval, 
       
   304                 KTimerInterval, 
       
   305                 TCallBack( TimerCallbackL, this ) );
       
   306         }
       
   307     else if ( !aOn )
       
   308         {
       
   309        if(!IsMatrixMenuInForegroundL())
       
   310             {
       
   311             //use case:Matrix Menu is exited, by entering into grid view,application view,capture mode...
       
   312             //Need to destroy all the collection's observers and context
       
   313             GLX_LOG_INFO1("CGlxContentHarvesterPluginDownloads::ActivateL !aOn =%d and matrix not in foreground",aOn);
       
   314             GetCHPlugin()->UpdatePlugins(aOn);
       
   315             }
       
   316         iPeriodic->Cancel();
       
   317         }
       
   318     }
       
   319 
       
   320 // ----------------------------------------------------------------------------
       
   321 // CGlxContentHarvesterPluginDownloads::HandleItemAddedL
       
   322 // ----------------------------------------------------------------------------
       
   323 //
       
   324 void CGlxContentHarvesterPluginDownloads::HandleItemAddedL(TInt /*aStartIndex*/, TInt /*aEndIndex*/, 
       
   325         MGlxMediaList* /*aList*/)
       
   326     {
       
   327     TRACER( "CGlxContentHarvesterPluginDownloads::HandleItemAddedL" );
       
   328     }
       
   329 
       
   330 // ---------------------------------------------------------------------------
       
   331 // CGlxContentHarvesterPluginDownloads::HandleMediaL
       
   332 // ---------------------------------------------------------------------------
       
   333 //
       
   334 void CGlxContentHarvesterPluginDownloads::HandleMediaL(TInt /*aListIndex*/, 
       
   335         MGlxMediaList* /*aList*/)
       
   336     {
       
   337     TRACER( "CGlxContentHarvesterPluginDownloads::HandleMediaL" );
       
   338     } 
       
   339 
       
   340 // ---------------------------------------------------------------------------
       
   341 // CGlxContentHarvesterPluginDownloads::HandleItemRemovedL
       
   342 // ---------------------------------------------------------------------------
       
   343 //
       
   344 void CGlxContentHarvesterPluginDownloads::HandleItemRemovedL(TInt /*aStartIndex*/, 
       
   345         TInt /* aEndIndex */, MGlxMediaList* /*aList*/)
       
   346     {
       
   347     TRACER( "CGlxContentHarvesterPluginDownloads::HandleItemRemovedL" );
       
   348     }
       
   349 
       
   350 // ---------------------------------------------------------------------------
       
   351 // CGlxContentHarvesterPluginDownloads::HandleItemModifiedL
       
   352 // ---------------------------------------------------------------------------
       
   353 //
       
   354 void CGlxContentHarvesterPluginDownloads::HandleItemModifiedL(
       
   355         const RArray<TInt>& /*aItemIndexes*/, 
       
   356         MGlxMediaList* /*aList*/)
       
   357     {
       
   358     TRACER( "CGlxContentHarvesterPluginDownloads::HandleItemModifiedL" );
       
   359     }
       
   360 
       
   361 // ---------------------------------------------------------------------------
       
   362 // CGlxContentHarvesterPluginDownloads::HandleAttributesAvailableL
       
   363 // ---------------------------------------------------------------------------
       
   364 //
       
   365 void CGlxContentHarvesterPluginDownloads::HandleAttributesAvailableL(TInt aItemIndex, 
       
   366         const RArray<TMPXAttribute>& aAttributes, MGlxMediaList* aList)
       
   367     {
       
   368     TRACER( "CGlxContentHarvesterPluginDownloads::HandleAttributesAvailableL" );
       
   369     TSize gridIconSize = GetGridIconSize();
       
   370     TMPXAttribute thumbnailAttribute(KGlxMediaIdThumbnail, 
       
   371             GlxFullThumbnailAttributeId( ETrue,  gridIconSize.iWidth, gridIconSize.iHeight ) );
       
   372 
       
   373     TIdentityRelation< TMPXAttribute > match ( &TMPXAttribute::Match );
       
   374 
       
   375     GLX_LOG_INFO1("CGlxContentHarvesterPluginDownloads::HandleAttributesAvailableL =%d ",aItemIndex);
       
   376     if (KErrNotFound != aAttributes.Find( thumbnailAttribute, match ))
       
   377         {
       
   378         const TGlxMedia& item = aList->Item( aItemIndex );
       
   379         const CGlxThumbnailAttribute* value = item.ThumbnailAttribute( thumbnailAttribute );
       
   380         if (value)
       
   381             {
       
   382             GLX_LOG_INFO("CGlxContentHarvesterPluginDownloads::HandleAttributesAvailableL Thumbnail is present ");
       
   383             iPreviewItemCount.InsertInOrder(aItemIndex);
       
   384 
       
   385             //if the collection on the matrix menu is not focused,then show only one thumbnail
       
   386             if(!IsFocused())
       
   387                 {
       
   388                 GLX_LOG_INFO("CGlxContentHarvesterPluginDownloads::HandleAttributesAvailableL,one thumbnail fetched");
       
   389                 UpdateDataInCPSL( value->iBitmap->Handle());
       
   390                 //if one thumbnail is fetched,it is sufficent when the collection is not in focus.
       
   391                 //remove the observer as client need not listen to the callbacks
       
   392                 iMediaList->RemoveMediaListObserver( this );
       
   393                 }
       
   394             else if (iPreviewItemCount.Count()  == KPreviewThumbnailFetchCount || 
       
   395                     iPreviewItemCount.Count() == aList->Count() )
       
   396                 {
       
   397                 //if the PreviewItemCount  equals 15 or if it is eqaul to the total count
       
   398                 //remove the observer as client need not listen to the callbacks 
       
   399                 GLX_LOG_INFO1("CGlxContentHarvesterPluginDownloads::HandleAttributesAvailableL,media list count=%d",aList->Count());
       
   400                 iMediaList->RemoveMediaListObserver( this );
       
   401                 }
       
   402             }//end of  check against value 
       
   403         }//end of  attribute match
       
   404     }
       
   405 
       
   406 // ---------------------------------------------------------------------------
       
   407 // CGlxContentHarvesterPluginDownloads::HandleFocusChangedL
       
   408 // ---------------------------------------------------------------------------
       
   409 //
       
   410 void CGlxContentHarvesterPluginDownloads::HandleFocusChangedL(
       
   411         NGlxListDefs::TFocusChangeType /*aType*/, 
       
   412         TInt /*aNewIndex*/, 
       
   413         TInt /*aOldIndex*/, 
       
   414         MGlxMediaList* /*aList*/)
       
   415     {
       
   416     TRACER( "CGlxContentHarvesterPluginDownloads::HandleFocusChangedL" );
       
   417     }
       
   418 
       
   419 
       
   420 // ---------------------------------------------------------------------------
       
   421 // CGlxContentHarvesterPluginDownloads::HandleItemSelectedL
       
   422 // ---------------------------------------------------------------------------
       
   423 //
       
   424 void CGlxContentHarvesterPluginDownloads::HandleItemSelectedL(TInt /*aIndex*/, 
       
   425         TBool /*aSelected*/, 
       
   426         MGlxMediaList* /*aList*/)
       
   427     {
       
   428     TRACER( "CGlxContentHarvesterPluginDownloads::HandleItemSelectedL" );
       
   429     }
       
   430 
       
   431 // ---------------------------------------------------------------------------
       
   432 // CGlxContentHarvesterPluginDownloads::HandleMessageL
       
   433 // ---------------------------------------------------------------------------
       
   434 //
       
   435 void CGlxContentHarvesterPluginDownloads::HandleMessageL(const CMPXMessage& /*aMessage*/, 
       
   436         MGlxMediaList* /*aList*/)
       
   437     {
       
   438     // Do nothing
       
   439     TRACER( "CGlxContentHarvesterPluginDownloads::HandleMessageL" );
       
   440     }   
       
   441 
       
   442 // ---------------------------------------------------------------------------
       
   443 // CGlxContentHarvesterPluginDownloads::DestroyMedialistL
       
   444 // ---------------------------------------------------------------------------
       
   445 //
       
   446 void CGlxContentHarvesterPluginDownloads::DestroyMedialist()
       
   447     {
       
   448     TRACER( "CGlxContentHarvesterPluginDownloads::DestroyMedialist" );
       
   449     if( iMediaList )
       
   450         {
       
   451         RemoveContextAndObserver();
       
   452         
       
   453         delete iUriAttributeContext;
       
   454         iUriAttributeContext = NULL;
       
   455         delete iThumbnailAttributeContext;
       
   456         iThumbnailAttributeContext = NULL;
       
   457         
       
   458         iMediaList->Close();
       
   459         iMediaList = NULL;
       
   460         }
       
   461     }
       
   462 
       
   463 // ---------------------------------------------------------------------------
       
   464 // CGlxContentHarvesterPluginDownloads::CreateMedialistL
       
   465 // ---------------------------------------------------------------------------
       
   466 //
       
   467 void CGlxContentHarvesterPluginDownloads::CreateMedialistL( )
       
   468     {
       
   469     TRACER( "CGlxContentHarvesterPluginDownloads::CreateMedialistL" );
       
   470     if(!iMediaList)
       
   471         {
       
   472         //if the collection is in focus then , create media list with context of 15 items else
       
   473         // with context of single item.
       
   474         if(IsFocused())
       
   475             {
       
   476             iThumbnailIterator.SetRange( KPreviewThumbnailFetchCount ); 
       
   477             }
       
   478         else
       
   479             {
       
   480             iThumbnailIterator.SetRange( KSinglePreviewThumbnail );
       
   481             }
       
   482 
       
   483         iMediaList = CreateMedialistAndAttributeContextL( TGlxMediaId( 
       
   484                 KGlxCollectionPluginDownloadsImplementationUid ),
       
   485                 iUriAttributeContext,iThumbnailAttributeContext);         
       
   486        
       
   487         AddContextAndObserverL();
       
   488         }
       
   489     }
       
   490 
       
   491 // ---------------------------------------------------------------------------
       
   492 // CGlxContentHarvesterPluginDownloads::UpdatePreviewThumbnailListL
       
   493 // ---------------------------------------------------------------------------
       
   494 //
       
   495 void CGlxContentHarvesterPluginDownloads::UpdatePreviewThumbnailListL( )
       
   496     {
       
   497     TRACER( "CGlxContentHarvesterPluginDownloads::UpdatePreviewThumbnailListL" );
       
   498 
       
   499     //when there is an update of content in the collection
       
   500     //this function is executed or when the collection recives the focus. 
       
   501     if(!iMediaList)
       
   502         {
       
   503         //medis list is not created yet,create it.
       
   504         CreateMedialistL( );
       
   505         //This is called to show the preview thumbnails. If no thumbnails are
       
   506         //present, display nothing 
       
   507         UpdateDataL();
       
   508         }
       
   509     else if(IsFocused())
       
   510         {
       
   511         //1.This loop is executed,when the collection gets focus
       
   512         //2.This loop is executed,when the contents are updated for this collection
       
   513         //and this collection has focus,so 15 thumbnails are fetched.
       
   514         HandleItemChanged();
       
   515         iThumbnailIterator.SetRange( KPreviewThumbnailFetchCount );
       
   516         RemoveContextAndObserver();
       
   517         AddContextAndObserverL();
       
   518         }
       
   519     else
       
   520         {
       
   521         //1.This loop is executed,when the contents are updated for this collection
       
   522         //and this collection doesn't have the focus,so only one thumbnail is fetched.
       
   523 
       
   524         //here we need to fetch only one item 
       
   525         //1.if the content is deleted,then creating a context doesn't fetch the attributes
       
   526         //2.if the content is added and the content is not the latest as per the sorted order of the
       
   527         // media list,then the thumbnails are not fetched.
       
   528         // so show the first available thumbnail in the media list.
       
   529 
       
   530         HandleItemChanged();
       
   531         UpdateDataL();
       
   532 
       
   533         //Adding the context doesn't gaurantee we get a call back for
       
   534         //Handle attributes available,if the latest item is already fetched.
       
   535         //and for the content added for this collection,if it is not latest
       
   536         //we will not recieve the attributes .so show the first available thumbnail 
       
   537         //in the media list.if there is any new latest content added,the thumbnail will be 
       
   538         //fetched and shown.
       
   539 
       
   540         iThumbnailIterator.SetRange( KSinglePreviewThumbnail );
       
   541         RemoveContextAndObserver();
       
   542         AddContextAndObserverL();
       
   543         }
       
   544     }
       
   545 
       
   546 // ---------------------------------------------------------------------------
       
   547 // CGlxContentHarvesterPluginDownloads::AddContextAndObserverL
       
   548 // ---------------------------------------------------------------------------
       
   549 //
       
   550 void CGlxContentHarvesterPluginDownloads::AddContextAndObserverL()
       
   551     {
       
   552     TRACER( "CGlxContentHarvesterPluginDownloads::AddRemoveContextAndObserverL" );   
       
   553     if(iMediaList)
       
   554         {
       
   555         iMediaList->AddMediaListObserverL( this );
       
   556         iMediaList->AddContextL(iUriAttributeContext, KGlxFetchContextPriorityNormal);
       
   557         iMediaList->AddContextL(iThumbnailAttributeContext, KGlxFetchContextPriorityLow);
       
   558         }
       
   559     }
       
   560 
       
   561 // ---------------------------------------------------------------------------
       
   562 // CGlxContentHarvesterPluginDownloads::RemoveContextAndObserver
       
   563 // ---------------------------------------------------------------------------
       
   564 //
       
   565 void CGlxContentHarvesterPluginDownloads::RemoveContextAndObserver()
       
   566     {
       
   567     TRACER( "CGlxContentHarvesterPluginDownloads::RemoveContextAndObserver" );   
       
   568     if(iMediaList)
       
   569         {
       
   570         iMediaList->RemoveMediaListObserver( this );
       
   571         iMediaList->RemoveContext(iUriAttributeContext);
       
   572         iMediaList->RemoveContext(iThumbnailAttributeContext); 
       
   573         }
       
   574     }
       
   575 
       
   576 
       
   577 // ---------------------------------------------------------------------------
       
   578 // CGlxContentHarvesterPluginDownloads::HandleError
       
   579 // ---------------------------------------------------------------------------
       
   580 //
       
   581 void CGlxContentHarvesterPluginDownloads::HandleError(TInt /*aError*/)
       
   582     {
       
   583     TRACER( "CGlxContentHarvesterPluginDownloads::HandleError" );    
       
   584 
       
   585 #ifdef _DEBUG
       
   586     if(iMediaList)
       
   587         {
       
   588         TInt count=iMediaList->Count();
       
   589         GLX_LOG_INFO1("CGlxContentHarvesterPluginDownloads::HandleError,count=%d",count);
       
   590         for ( TInt i = 0; i < count ; i++ )
       
   591             {
       
   592             const TGlxMedia& item = iMediaList->Item( i );
       
   593             TInt thumbnailError = GlxErrorManager::HasAttributeErrorL(
       
   594                     item.Properties(), KGlxMediaIdThumbnail );
       
   595             GLX_LOG_INFO1("CGlxContentHarvesterPluginDownloads::HandleError,Error=%d ",thumbnailError);
       
   596 
       
   597             }
       
   598         }
       
   599 #endif
       
   600     }
       
   601 
       
   602 // ---------------------------------------------------------------------------
       
   603 // CGlxContentHarvesterPluginDownloads::Count
       
   604 // ---------------------------------------------------------------------------
       
   605 //
       
   606 TInt CGlxContentHarvesterPluginDownloads::Count()
       
   607     {
       
   608     TRACER( "CGlxContentHarvesterPluginDownloads::Count" );    
       
   609     TInt count = KErrNone;
       
   610     if(iMediaList)
       
   611         {
       
   612         count = iMediaList->Count();
       
   613         GLX_LOG_INFO1("GlxCHP:Downloads::Count(%d)",count);
       
   614         }
       
   615     return count;
       
   616     }
       
   617 //  End of File
       
   618