diff -r fb3763350a08 -r 4d54b72983ae taskswitcher/contextengine/tsfswpreviewprovider/src/tspropertylistener.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/taskswitcher/contextengine/tsfswpreviewprovider/src/tspropertylistener.cpp	Tue Jan 26 11:48:23 2010 +0200
@@ -0,0 +1,147 @@
+/*
+* Copyright (c) 2008 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".
+*/
+
+#include "tspropertylistener.h"
+#include "previewproviderlogging.h"
+
+
+
+// --------------------------------------------------------------------------
+// CTsPropertyListener::~CTsPropertyListener
+// --------------------------------------------------------------------------
+//
+CTsPropertyListener::~CTsPropertyListener()
+    {
+    Cancel();
+    iProperty.Close();
+    }
+
+// --------------------------------------------------------------------------
+// CTsPropertyListener::CTsPropertyListener
+// --------------------------------------------------------------------------
+//
+CTsPropertyListener::CTsPropertyListener( MTsFastSwapPreviewObserver& aObs ) : 
+    CActive( CActive::EPriorityHigh ), iObs( aObs )
+    {
+    }
+
+// --------------------------------------------------------------------------
+// CTsPropertyListener::NewL
+// --------------------------------------------------------------------------
+//
+CTsPropertyListener* CTsPropertyListener::NewL( MTsFastSwapPreviewObserver& aObs )
+    {
+    CTsPropertyListener* self = new ( ELeave ) CTsPropertyListener( aObs );
+    CleanupStack::PushL( self );
+    self->ConstructL();
+    CleanupStack::Pop( self );
+    return self;    
+    }
+
+// --------------------------------------------------------------------------
+// CTsPropertyListener::RunL
+// --------------------------------------------------------------------------
+//
+void CTsPropertyListener::RunL()
+    {
+    // Resubscribe before processing new value to prevent missing updates
+    Subscribe();
+    
+    // Read all properties to member variables
+    ReadPropertiesL();
+    
+    // Do the callback
+    switch( iOperation )
+        {
+        case EOperationUnregister:
+            {
+            iObs.HandleFswPpApplicationUnregistered( iWgId );
+            break;            
+            }        
+        case EOperationBitmapUpdated:
+            {
+            iObs.HandleFswPpApplicationChange( iWgId, iFbsBitmapId );
+            break;
+            }
+        default:
+            break;
+        }
+    }
+
+// --------------------------------------------------------------------------
+// CTsPropertyListener::DoCancel
+// --------------------------------------------------------------------------
+//
+void CTsPropertyListener::DoCancel()
+    {
+    iProperty.Cancel();
+    }
+
+// --------------------------------------------------------------------------
+// CTsPropertyListener::ReadProperties
+// --------------------------------------------------------------------------
+//
+void CTsPropertyListener::ReadPropertiesL()
+    {
+    // Read all properties
+    User::LeaveIfError( iProperty.Get( KPSUidPreviewProvider, KPSKeyWgId, iWgId ) );
+    User::LeaveIfError( iProperty.Get( KPSUidPreviewProvider, KPSKeyFbsBitmapId, iFbsBitmapId ) );
+    TInt operation( 0 );
+    User::LeaveIfError( iProperty.Get( KPSUidPreviewProvider, KPSKeyOperation, operation ) );
+    iOperation = static_cast<TPreviewOperation>( operation );    
+    }
+
+// --------------------------------------------------------------------------
+// CTsPropertyListener::DefinePropertyL
+// --------------------------------------------------------------------------
+//
+void CTsPropertyListener::DefinePropertyL( TInt aPSKey )
+    {
+    TInt err = RProperty::Define( KPSUidPreviewProvider, aPSKey, RProperty::EInt );
+    // Don't mind the already exists error
+    if ( err != KErrAlreadyExists && err != KErrPermissionDenied )
+        {
+        User::LeaveIfError( err );
+        }    
+    }
+
+// --------------------------------------------------------------------------
+// CTsPropertyListener::Subscribe
+// --------------------------------------------------------------------------
+//
+void CTsPropertyListener::Subscribe()
+    {
+    iProperty.Subscribe( iStatus );
+    SetActive();  
+    }
+
+// --------------------------------------------------------------------------
+// CTsPropertyListener::ConstructL
+// --------------------------------------------------------------------------
+//
+void CTsPropertyListener::ConstructL()
+    {
+    TSLOG_CONTEXT( ConstructL, TSLOG_LOCAL );
+    TSLOG_IN();
+    
+    DefinePropertyL( KPSKeyWgId );
+    DefinePropertyL( KPSKeyFbsBitmapId );
+    DefinePropertyL( KPSKeyOperation );
+    
+    User::LeaveIfError( iProperty.Attach( KPSUidPreviewProvider, KPSKeyWgId ) );
+    CActiveScheduler::Add( this );
+    
+    // initial subscription
+    Subscribe();
+    
+    TSLOG_OUT();
+    }
+
+// End of file
+