photosgallery/collectionframework/thumbnailcreator/thumbnailcomposerplugin/glxthumbnailcomposerplugin.cpp
branchRCL_3
changeset 60 5b3385a43d68
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59:8e5f6eea9c9f 60:5b3385a43d68
       
     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:    Thumbnail Composer plugin
       
    15 *
       
    16 */
       
    17 
       
    18 
       
    19 
       
    20 
       
    21 /**
       
    22  * @internal reviewed 12/07/2007 by Simon Brooks
       
    23  */
       
    24 
       
    25 #include <e32base.h>
       
    26 
       
    27 #include <MdELogicCondition.h>
       
    28 #include <mdeconstants.h>
       
    29 
       
    30 #include <mpxcollectionutility.h>
       
    31 #include <mpxcollectionpath.h>
       
    32 #include <mpxcollectionmessage.h>
       
    33 #include <mpxmessagegeneraldefs.h>
       
    34 #include <mpxcollectionframeworkdefs.h>
       
    35 
       
    36 #include <glxassert.h>
       
    37 #include <glxcollectionpluginall.hrh>
       
    38 #include <glxthumbnailattributeinfo.h>
       
    39 #include <glxbackgroundtnmessagedefs.h>
       
    40 #include <glxmediaid.h>
       
    41 #include <glxthumbnailinfo.h>
       
    42 #include <glxfilterfactory.h>
       
    43 #include <glxcommandfactory.h>
       
    44 #include <glxtracer.h>
       
    45 #include <hal.h>
       
    46 
       
    47 #include "glxthumbnailcomposerplugin.h"
       
    48 
       
    49 // This can be any number other than zero
       
    50 const TUint KGlxBackgroundThumbnailAttributeId = 1;
       
    51 const TInt KGlxThumbnailComposerInactivityTimeout = 30; // seconds
       
    52 const TInt KGlxThumbnailComposerDelay = 10000; // microseconds
       
    53 const TInt KGlxThumbnailComposerHarvestDelay = 5000000; // microseconds
       
    54 const TInt KGlxThumbnailComposerLargeDelay = 30000000; // microseconds
       
    55 const TInt KGlxDisplayStatusTimeOutDelay = 5000000; // 5 secs
       
    56 
       
    57 // ---------------------------------------------------------------------------
       
    58 // destructor
       
    59 // ---------------------------------------------------------------------------
       
    60 //
       
    61 CGlxThumbnailCompeserInactivityTimer::~CGlxThumbnailCompeserInactivityTimer()
       
    62     {
       
    63     // no implementation
       
    64     }
       
    65 
       
    66 
       
    67 // ---------------------------------------------------------------------------
       
    68 // NewL
       
    69 // ---------------------------------------------------------------------------
       
    70 //
       
    71 CGlxThumbnailCompeserInactivityTimer* CGlxThumbnailCompeserInactivityTimer::NewL(TInt aPriority, CGlxThumbnailComposerPlugin& aCallback)
       
    72     {
       
    73 	TRACER("CGlxThumbnailCompeserInactivityTimer::NewL");
       
    74 	CGlxThumbnailCompeserInactivityTimer* self = 
       
    75 	                              new (ELeave) CGlxThumbnailCompeserInactivityTimer(aPriority, aCallback);
       
    76 	CleanupStack::PushL(self);
       
    77 	self->ConstructL();
       
    78 	CleanupStack::Pop(self);
       
    79 	CActiveScheduler::Add(self);
       
    80 	return self;
       
    81     }
       
    82 
       
    83 // ---------------------------------------------------------------------------
       
    84 // After
       
    85 // ---------------------------------------------------------------------------
       
    86 //
       
    87 void CGlxThumbnailCompeserInactivityTimer::After( TTimeIntervalMicroSeconds32 aInterval )
       
    88     {
       
    89     TRACER("CGlxThumbnailCompeserInactivityTimer::After");
       
    90 
       
    91     // Fix for ELLZ-7DBBDZ and JPKN-7M2AYJ: to prevent a KERN EXEC 15 panic that occurs 
       
    92     // if a timer request is made while one is already outstanding.
       
    93     Cancel();
       
    94     // Forward the call on to the base class.
       
    95     CTimer::After( aInterval );
       
    96     }
       
    97 
       
    98 // ---------------------------------------------------------------------------
       
    99 // constructor
       
   100 // ---------------------------------------------------------------------------
       
   101 //
       
   102 CGlxThumbnailCompeserInactivityTimer::CGlxThumbnailCompeserInactivityTimer(TInt aPriority, CGlxThumbnailComposerPlugin& aCallback)
       
   103          : CTimer(aPriority), iCallback(aCallback)
       
   104         {
       
   105         // no implementation
       
   106         }
       
   107 
       
   108 // ---------------------------------------------------------------------------
       
   109 // RunL
       
   110 // ---------------------------------------------------------------------------
       
   111 //
       
   112 void CGlxThumbnailCompeserInactivityTimer::RunL()
       
   113     {
       
   114 	TRACER("CGlxThumbnailCompeserInactivityTimer::RunL");
       
   115 	
       
   116     TInt dispState = KErrNotFound;
       
   117     TInt ret = HAL::Get(HALData::EDisplayState, dispState);
       
   118     GLX_DEBUG4("CGlxThumbnailCompeserInactivityTimer::RunL iCallback.iState = %d, ret=%d, dispState= %d", 
       
   119     																iCallback.iState, ret, dispState );
       
   120 	if (iCallback.iState && ret == KErrNone && dispState)
       
   121 		{
       
   122 		iCallback.DelayDisplayStateCheck();
       
   123 	    GLX_LOG_INFO("GlxThumbnailCompeser - DISPLAY ON - DO NOT PROCESS" );
       
   124 		return;
       
   125 		}
       
   126 
       
   127 	GLX_LOG_INFO("GlxThumbnailCompeser - DISPLAY OFF - ALLOW TO PROCESS" );
       
   128 		
       
   129 	switch (iCallback.iState)
       
   130 	    {
       
   131     	case CGlxThumbnailComposerPlugin::EStateFirstOpening:
       
   132     	case CGlxThumbnailComposerPlugin::EStateOpening:
       
   133     	    {
       
   134             iCallback.DoOpenCollectionL();
       
   135             break;
       
   136     	    }
       
   137         case CGlxThumbnailComposerPlugin::EStateActiveSmall:
       
   138         case CGlxThumbnailComposerPlugin::EStateActiveLarge:
       
   139             {
       
   140         	iCallback.DoRequestItemL();
       
   141         	break;
       
   142             }
       
   143         case CGlxThumbnailComposerPlugin::EStateClosing:
       
   144             {
       
   145             iCallback.CloseCollection();
       
   146             break;
       
   147             }
       
   148 	    }
       
   149     }
       
   150 
       
   151 // ---------------------------------------------------------------------------
       
   152 // DoCancel
       
   153 // ---------------------------------------------------------------------------
       
   154 //
       
   155 void CGlxThumbnailCompeserInactivityTimer::DoCancel()
       
   156     {
       
   157     // no implementation
       
   158     }
       
   159 
       
   160 // ---------------------------------------------------------------------------
       
   161 // RunError
       
   162 // ---------------------------------------------------------------------------
       
   163 //
       
   164 TInt CGlxThumbnailCompeserInactivityTimer::RunError(TInt /*aError*/)
       
   165     {
       
   166 	TRACER("CGlxThumbnailCompeserInactivityTimer::RunError");
       
   167     iCallback.ReturnToIdle();
       
   168     return KErrNone;
       
   169     }
       
   170 
       
   171 
       
   172 
       
   173 // ---------------------------------------------------------------------------
       
   174 // NewL
       
   175 // ---------------------------------------------------------------------------
       
   176 //
       
   177 CGlxThumbnailComposerPlugin* CGlxThumbnailComposerPlugin::NewL()
       
   178 	{
       
   179 	TRACER("CGlxThumbnailComposerPlugin::NewL");
       
   180 	CGlxThumbnailComposerPlugin* self = 
       
   181 	                              new (ELeave) CGlxThumbnailComposerPlugin();
       
   182 	CleanupStack::PushL(self);
       
   183 	self->ConstructL();
       
   184 	CleanupStack::Pop(self);
       
   185 	return self;
       
   186 	}
       
   187 
       
   188 // ---------------------------------------------------------------------------
       
   189 // ~CGlxThumbnailComposerPlugin
       
   190 // ---------------------------------------------------------------------------
       
   191 //
       
   192 CGlxThumbnailComposerPlugin::~CGlxThumbnailComposerPlugin()
       
   193 	{
       
   194 	delete iPath;
       
   195     if (iCollectionUtility)
       
   196         {
       
   197         iCollectionUtility->Close();
       
   198         }
       
   199 
       
   200 	if ( iInactivityTimer )
       
   201 	    {
       
   202     	iInactivityTimer->Cancel();
       
   203 	    }
       
   204 	delete iInactivityTimer;
       
   205 	}
       
   206 
       
   207 // ---------------------------------------------------------------------------
       
   208 // CGlxThumbnailComposerPlugin
       
   209 // ---------------------------------------------------------------------------
       
   210 //
       
   211 CGlxThumbnailComposerPlugin::CGlxThumbnailComposerPlugin() : iLastError(KErrNone)
       
   212 	{
       
   213 	}
       
   214 
       
   215 // ---------------------------------------------------------------------------
       
   216 // ConstructL
       
   217 // ---------------------------------------------------------------------------
       
   218 //
       
   219 void CGlxThumbnailComposerPlugin::ConstructL()
       
   220 	{
       
   221 	TRACER("CGlxThumbnailComposerPlugin::ConstructL");
       
   222 	iInactivityTimer = CGlxThumbnailCompeserInactivityTimer::NewL(CActive::EPriorityIdle, *this);
       
   223 	}
       
   224 
       
   225 // ---------------------------------------------------------------------------
       
   226 // SetObservers
       
   227 // ---------------------------------------------------------------------------
       
   228 //
       
   229 void CGlxThumbnailComposerPlugin::SetObservers()
       
   230 	{
       
   231 	TRAPD(err, SetObserversL());
       
   232     GLX_ASSERT_ALWAYS( KErrNone == err, Panic( EGlxPanicEnvironment ),
       
   233                         "CGlxThumbnailComposerPlugin cannot set observers, reset Harvester server" );
       
   234 	}
       
   235 
       
   236 // ---------------------------------------------------------------------------
       
   237 // SetObserversL
       
   238 // ---------------------------------------------------------------------------
       
   239 //
       
   240 void CGlxThumbnailComposerPlugin::SetObserversL()
       
   241 	{
       
   242 	TRACER("CGlxThumbnailComposerPlugin::SetObserversL");
       
   243 	if ( iSession )
       
   244 		{
       
   245 		CMdELogicCondition* condition = 
       
   246 		            CMdELogicCondition::NewLC( ELogicConditionOperatorOr );
       
   247 
       
   248 #ifdef RD_MDS_2_0
       
   249 
       
   250 		CMdENamespaceDef* defaultNamespace = 
       
   251 		               iSession->GetDefaultNamespaceDefL();
       
   252 
       
   253     	CMdEObjectDef* imageDef = defaultNamespace->GetObjectDefL(
       
   254     	                                MdeConstants::Image::KImageObject );
       
   255 		condition->AddObjectConditionL( *imageDef );
       
   256 
       
   257     	CMdEObjectDef* videoDef = defaultNamespace->GetObjectDefL(
       
   258     	                                MdeConstants::Video::KVideoObject );
       
   259 		condition->AddObjectConditionL( *videoDef );
       
   260 
       
   261 #else
       
   262 
       
   263 		CMdENamespaceDef& defaultNamespace = 
       
   264 		               iSession->GetDefaultNamespaceDefL();
       
   265 
       
   266     	CMdEObjectDef& imageDef = defaultNamespace.GetObjectDefL(
       
   267     	                                MdeConstants::Image::KImageObject );
       
   268 		condition->AddObjectConditionL( imageDef );
       
   269 
       
   270     	CMdEObjectDef& videoDef = defaultNamespace.GetObjectDefL(
       
   271     	                                MdeConstants::Video::KVideoObject );
       
   272 		condition->AddObjectConditionL( videoDef );
       
   273 
       
   274 #endif
       
   275 
       
   276 		iSession->AddObjectObserverL( *this, condition );
       
   277     	CleanupStack::Pop( condition );
       
   278     	
       
   279         if ( iState == EStateIdle )
       
   280             {
       
   281             iState = EStateFirstOpening;
       
   282             iInactivityTimer->After(KGlxThumbnailComposerLargeDelay);
       
   283             }
       
   284 		}
       
   285 	}
       
   286 
       
   287 // ---------------------------------------------------------------------------
       
   288 // RemoveObservers
       
   289 // ---------------------------------------------------------------------------
       
   290 //
       
   291 void CGlxThumbnailComposerPlugin::RemoveObservers()
       
   292 	{
       
   293 	if ( iSession )
       
   294 		{
       
   295 #ifdef RD_MDS_2_0
       
   296 		iSession->RemoveObjectObserver( *this );
       
   297 #else
       
   298 		TRAP_IGNORE(iSession->RemoveObjectObserverL( *this ));
       
   299 #endif
       
   300 		}
       
   301 	}
       
   302 
       
   303 // ---------------------------------------------------------------------------
       
   304 // IsComposingComplete
       
   305 // ---------------------------------------------------------------------------
       
   306 //
       
   307 TBool CGlxThumbnailComposerPlugin::IsComposingComplete()
       
   308 	{
       
   309 	TRACER("CGlxThumbnailComposerPlugin::IsComposingComplete");
       
   310 	// Need to stop background thumbnail generation activity
       
   311 	// when harvester requests to pause. 
       
   312 	    
       
   313 	    if (iState != EStateIdle)
       
   314 	        {
       
   315 	        iState = EStateClosing;
       
   316 	        
       
   317 	        if ( iInactivityTimer )
       
   318 	            {
       
   319 	            iInactivityTimer->Cancel();
       
   320 	            }
       
   321 
       
   322 	        if (iCollectionUtility)
       
   323 	            {
       
   324 	            iCollectionUtility->Close();
       
   325 	            iCollectionUtility = NULL;
       
   326 	            }
       
   327 	            
       
   328 	        iState = EStateIdle;
       
   329 	        }
       
   330 	    
       
   331 	    return ETrue ;
       
   332 	}
       
   333 
       
   334 #ifdef RD_MDS_2_0
       
   335 
       
   336 // ---------------------------------------------------------------------------
       
   337 // HandleObjectAdded
       
   338 // ---------------------------------------------------------------------------
       
   339 //
       
   340 void CGlxThumbnailComposerPlugin::HandleObjectAdded(
       
   341         CMdESession& /*aSession*/, const RArray<TItemId>& /*aObjectIdArray*/ )
       
   342 	{
       
   343 	TRACER("CGlxThumbnailComposerPlugin::HandleObjectAdded");
       
   344     if ( ( iState == EStateIdle ) || ( iState == EStateFirstOpening ) || ( iState == EStateClosing ) )
       
   345         {
       
   346         iInactivityTimer->Cancel();
       
   347         iState = EStateOpening;
       
   348         iInactivityTimer->After(20000000);
       
   349         }
       
   350     else
       
   351         {
       
   352         iLastError = 1;
       
   353         iState = EStateActiveLarge;
       
   354         }
       
   355 	}
       
   356 
       
   357 // ---------------------------------------------------------------------------
       
   358 // HandleObjectModified
       
   359 // ---------------------------------------------------------------------------
       
   360 //
       
   361 void CGlxThumbnailComposerPlugin::HandleObjectModified(
       
   362                                     CMdESession& /*aSession*/, 
       
   363                                     const RArray<TItemId>& /*aObjectIdArray*/)
       
   364 	{
       
   365 	//no implemention needed
       
   366 	}
       
   367 
       
   368 // ---------------------------------------------------------------------------
       
   369 // HandleObjectRemoved
       
   370 // ---------------------------------------------------------------------------
       
   371 //
       
   372 void CGlxThumbnailComposerPlugin::HandleObjectRemoved(
       
   373                                     CMdESession& /*aSession*/, 
       
   374                                     const RArray<TItemId>& /*aObjectIdArray*/)
       
   375 	{
       
   376 	//no implemention needed
       
   377 	}
       
   378 
       
   379 #else
       
   380 
       
   381 void CGlxThumbnailComposerPlugin::HandleObjectNotification(CMdESession& /*aSession*/, 
       
   382 					TObserverNotificationType aType,
       
   383 					const RArray<TItemId>& /*aObjectIdArray*/)
       
   384 	{
       
   385 	TRACER("CGlxThumbnailComposerPlugin::HandleObjectNotification");
       
   386     if (aType == ENotifyAdd)
       
   387     	{
       
   388 			if ( iState == EStateIdle )
       
   389 		        {
       
   390 		        iState = EStateOpening;
       
   391 		        iInactivityTimer->After(KGlxThumbnailComposerLargeDelay);
       
   392 		        }
       
   393 		    else
       
   394 		        {
       
   395 		        iLastError = 1;
       
   396 		        iState = EStateActiveLarge;
       
   397 		        iInactivityTimer->After(KGlxThumbnailComposerLargeDelay);
       
   398 		        }
       
   399     	}
       
   400 	}
       
   401 
       
   402 #endif
       
   403 
       
   404 // ---------------------------------------------------------------------------
       
   405 // HandleCollectionMediaL
       
   406 // ---------------------------------------------------------------------------
       
   407 //
       
   408 void CGlxThumbnailComposerPlugin::HandleCollectionMediaL(
       
   409                                 const CMPXMedia& /*aMedia*/, TInt aError )
       
   410     {
       
   411 	TRACER("CGlxThumbnailComposerPlugin::HandleCollectionMediaL");
       
   412     if ( iPath && KErrNone != aError )
       
   413         {
       
   414         GLX_LOG_WARNING1( "Error %d getting media", aError );
       
   415 
       
   416         // Error generating thumbnails, try the next item
       
   417         iLastError = aError;
       
   418         iCurrentIndex++;
       
   419         RequestItemL();
       
   420         }
       
   421     }
       
   422 
       
   423 // ---------------------------------------------------------------------------
       
   424 // HandleCollectionMessageL
       
   425 // ---------------------------------------------------------------------------
       
   426 //
       
   427 void CGlxThumbnailComposerPlugin::HandleCollectionMessage(
       
   428                                         CMPXMessage* aMsg, TInt /*aErr*/ )
       
   429     {
       
   430 	TRACER("CGlxThumbnailComposerPlugin::HandleCollectionMessage");
       
   431     if ( iState != EStateIdle && aMsg )
       
   432         {
       
   433         TRAPD( err, DoHandleCollectionMessageL( *aMsg ) );
       
   434         if ( KErrNone != err )
       
   435             {
       
   436             GLX_LOG_WARNING1( "Error %d handling message", err );
       
   437             ReturnToIdle();
       
   438             }
       
   439         }
       
   440     }
       
   441 
       
   442 // ---------------------------------------------------------------------------
       
   443 // HandleOpenL
       
   444 // ---------------------------------------------------------------------------
       
   445 //
       
   446 void CGlxThumbnailComposerPlugin::HandleOpenL( const CMPXMedia& /*aEntries*/,
       
   447                           TInt /*aIndex*/, TBool /*aComplete*/, TInt aError )
       
   448     {
       
   449 	TRACER("CGlxThumbnailComposerPlugin::HandleOpenL");
       
   450     if ( KErrNone != aError )
       
   451         {
       
   452         GLX_LOG_WARNING1( "Error %d opening collection", aError );
       
   453         ReturnToIdle();
       
   454         }
       
   455     }
       
   456 
       
   457 // ---------------------------------------------------------------------------
       
   458 // HandleOpenL
       
   459 // ---------------------------------------------------------------------------
       
   460 //
       
   461 void CGlxThumbnailComposerPlugin::HandleOpenL(
       
   462             const CMPXCollectionPlaylist& /*aPlaylist*/, TInt /*aError*/ )
       
   463     {
       
   464 	// No implemention needed
       
   465     }
       
   466 
       
   467 // ---------------------------------------------------------------------------
       
   468 // HandleCommandComplete
       
   469 // ---------------------------------------------------------------------------
       
   470 //
       
   471 void CGlxThumbnailComposerPlugin::HandleCommandComplete(
       
   472                         CMPXCommand* /*aCommandResult*/, TInt /*aError*/ )
       
   473     {
       
   474 	TRACER("CGlxThumbnailComposerPlugin::HandleCommandComplete");
       
   475     if( EStateCleanup == iState )
       
   476         {
       
   477         ReturnToIdle();
       
   478         }
       
   479     else
       
   480         {
       
   481         iInactivityTimer->After(0);
       
   482         }
       
   483     }
       
   484 
       
   485 // ---------------------------------------------------------------------------
       
   486 // DoOpenCollectionL
       
   487 // ---------------------------------------------------------------------------
       
   488 //
       
   489 void CGlxThumbnailComposerPlugin::DoOpenCollectionL()
       
   490     {
       
   491 	TRACER("CGlxThumbnailComposerPlugin::HandleCollectionMediaL");
       
   492     if ( !iCollectionUtility )
       
   493         {
       
   494         // Open isolated collection utility
       
   495         iCollectionUtility = MMPXCollectionUtility::NewL(
       
   496                                                 this, KMcModeIsolated );
       
   497         }
       
   498 
       
   499     CMPXFilter* filter = CMPXFilter::NewL();
       
   500     CleanupStack::PushL(filter);
       
   501     filter->SetTObjectValueL<TGlxFilterSortDirection>(KGlxFilterGeneralSortDirection, EGlxFilterSortDirectionDescending);        
       
   502     iCollectionUtility->Collection().SetFilterL(filter);
       
   503     CleanupStack::PopAndDestroy(filter);
       
   504 
       
   505     CMPXCollectionPath* path = CMPXCollectionPath::NewL();
       
   506     CleanupStack::PushL( path );
       
   507     // argument  path  all collection id
       
   508    	path->AppendL( KGlxCollectionPluginAllImplementationUid );
       
   509 
       
   510 	iCollectionUtility->Collection().OpenL( *path );
       
   511  	CleanupStack::PopAndDestroy( path );
       
   512 
       
   513     iState = EStateActiveSmall;                    
       
   514     }
       
   515 
       
   516 // ---------------------------------------------------------------------------
       
   517 // DoHandleCollectionMessageL
       
   518 // ---------------------------------------------------------------------------
       
   519 //
       
   520 void CGlxThumbnailComposerPlugin::DoHandleCollectionMessageL(
       
   521                                                  const CMPXMessage& aMsg )
       
   522     {
       
   523 	TRACER("CGlxThumbnailComposerPlugin::DoHandleCollectionMessageL");
       
   524     if ( aMsg.IsSupported( KMPXMessageGeneralId ) )
       
   525         {
       
   526         TInt messageId = aMsg.ValueTObjectL<TInt>( KMPXMessageGeneralId );
       
   527 
       
   528 	    // Is it a background thumbnail message        
       
   529 	    if ( KGlxMessageIdBackgroundThumbnail == messageId )
       
   530 	        {
       
   531 	        // Is it the item expected
       
   532 	        TGlxMediaId id( ( TUint32 )
       
   533 	             aMsg.ValueTObjectL<TMPXItemId>( KGlxBackgroundThumbnailMediaId ) );
       
   534 	        if ( iPath && id.Value()
       
   535 	                        == ( TUint32 )iPath->IdOfIndex( iCurrentIndex ) )
       
   536 	            {
       
   537 	            TInt error = aMsg.ValueTObjectL<TInt>( KGlxBackgroundThumbnailError );
       
   538 	            if ( error == KErrCancel )
       
   539 	                {
       
   540 	                iState = EStateActiveLarge;
       
   541     	            iLastError = error;
       
   542 	                }
       
   543 	            else if( KErrNone != error )
       
   544 	                {
       
   545                     GLX_LOG_WARNING1( "Error %d in command", error );
       
   546                     error = KErrNone;
       
   547 	                }
       
   548 	            // Yes, then request the next item
       
   549 	            iCurrentIndex++;
       
   550 	            RequestItemL();
       
   551 	            }
       
   552 	        }
       
   553         else if ( KMPXMessageGeneral == messageId
       
   554                 && aMsg.IsSupported( KMPXMessageGeneralEvent ) )
       
   555             {
       
   556             TInt messageEvent = aMsg.ValueTObjectL<TInt>( KMPXMessageGeneralEvent );
       
   557 
       
   558             // Is it a path changed event
       
   559             if ( TMPXCollectionMessage::EPathChanged == messageEvent
       
   560                 && aMsg.IsSupported( KMPXMessageGeneralType ) )
       
   561                 {
       
   562     	        TInt messageType = aMsg.ValueTObjectL<TInt>( KMPXMessageGeneralType );
       
   563 
       
   564              	if ( EMcPathChangedByOpen == messageType
       
   565              	    && iCollectionUtility && !iPath )
       
   566             	    {
       
   567          		    iPath = iCollectionUtility->Collection().PathL();
       
   568 
       
   569                    	iCurrentIndex = 0;
       
   570                     RequestItemL();
       
   571             	    }
       
   572                }
       
   573             }
       
   574         }
       
   575     }
       
   576 
       
   577 // ---------------------------------------------------------------------------
       
   578 // RequestItemL
       
   579 // ---------------------------------------------------------------------------
       
   580 //
       
   581 void CGlxThumbnailComposerPlugin::RequestItemL()
       
   582     {
       
   583 	TRACER("CGlxThumbnailComposerPlugin::RequestItemL");
       
   584     if ( iLastError == KErrCancel )
       
   585         {
       
   586         iInactivityTimer->Inactivity(KGlxThumbnailComposerInactivityTimeout);
       
   587         }
       
   588     else if ( iLastError == 1 )
       
   589         {
       
   590         iInactivityTimer->After(KGlxThumbnailComposerHarvestDelay);
       
   591         }
       
   592     else
       
   593         {
       
   594         iInactivityTimer->After(KGlxThumbnailComposerDelay);
       
   595         }
       
   596     iLastError = KErrNone;
       
   597     }
       
   598     
       
   599 // ---------------------------------------------------------------------------
       
   600 // DoRequestItemL
       
   601 // ---------------------------------------------------------------------------
       
   602 //
       
   603 void CGlxThumbnailComposerPlugin::DoRequestItemL()
       
   604     {
       
   605 	TRACER("CGlxThumbnailComposerPlugin::DoRequestItemL");
       
   606 
       
   607     if ( iPath && iCurrentIndex < iPath->Count() )
       
   608         {
       
   609         GLX_ASSERT_ALWAYS( iCollectionUtility, Panic( EGlxPanicNullPointer ),
       
   610                             "No collection utility" );
       
   611         // request next item
       
   612     	iPath->Set( iCurrentIndex );
       
   613 
       
   614         RArray<TMPXAttribute> attrs;
       
   615         CleanupClosePushL( attrs );
       
   616         // Add thumbnail attribute
       
   617         attrs.AppendL( TMPXAttribute(
       
   618                 KGlxMediaIdThumbnail, KGlxBackgroundThumbnailAttributeId ) );
       
   619 
       
   620         // Don't add spec for bitmap handle, to request background thumbnail
       
   621         CMPXAttributeSpecs* attrSpecs = NULL;
       
   622         
       
   623         // Start first task
       
   624         iCollectionUtility->Collection().MediaL(
       
   625                                     *iPath, attrs.Array(), attrSpecs );
       
   626         CleanupStack::PopAndDestroy( &attrs );
       
   627         }
       
   628     else
       
   629         {
       
   630         delete iPath;
       
   631         iPath = NULL;
       
   632         
       
   633         if ( iState == EStateActiveLarge )
       
   634             {
       
   635             // go on to do small thumbnails
       
   636             DoOpenCollectionL();
       
   637             }
       
   638         else
       
   639             {
       
   640             CMPXCommand* command
       
   641                             = TGlxCommandFactory::ThumbnailCleanupCommandLC();
       
   642             iCollectionUtility->Collection().CommandL( *command );
       
   643             CleanupStack::PopAndDestroy( command );
       
   644 
       
   645             iState = EStateCleanup;
       
   646             }
       
   647         }
       
   648     }
       
   649 
       
   650 // ---------------------------------------------------------------------------
       
   651 // ReturnToIdle
       
   652 // ---------------------------------------------------------------------------
       
   653 //
       
   654 void CGlxThumbnailComposerPlugin::ReturnToIdle()
       
   655     {
       
   656 	TRACER("CGlxThumbnailComposerPlugin::ReturnToIdle");
       
   657     iState = EStateClosing;
       
   658     iInactivityTimer->After(KGlxThumbnailComposerLargeDelay);
       
   659     }
       
   660 
       
   661 // ---------------------------------------------------------------------------
       
   662 // DelayDisplayStateCheck
       
   663 // ---------------------------------------------------------------------------
       
   664 //
       
   665 void CGlxThumbnailComposerPlugin::DelayDisplayStateCheck()
       
   666     {
       
   667 	TRACER("CGlxThumbnailComposerPlugin::DelayDisplayStateCheck");
       
   668     iInactivityTimer->After(KGlxDisplayStatusTimeOutDelay);	
       
   669     }
       
   670 
       
   671 // ---------------------------------------------------------------------------
       
   672 // CloseCollection
       
   673 // ---------------------------------------------------------------------------
       
   674 //
       
   675 void CGlxThumbnailComposerPlugin::CloseCollection()
       
   676     {
       
   677 	TRACER("CGlxThumbnailComposerPlugin::CloseCollection");
       
   678     if ( ( EStateClosing == iState ) && iCollectionUtility )
       
   679         {
       
   680         iCollectionUtility->Close();
       
   681         iCollectionUtility = NULL;
       
   682         iState = EStateIdle;
       
   683         }
       
   684     }