diff -r 000000000000 -r 164170e6151a securitydialogs/lockapp/src/lockapppubsubobserver.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/securitydialogs/lockapp/src/lockapppubsubobserver.cpp	Tue Jan 26 15:20:08 2010 +0200
@@ -0,0 +1,146 @@
+/*
+* Copyright (c) 2007 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".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:  Publish & Subscribe key observer
+ *
+*/
+
+
+#include "lockapppubsubobserver.h"
+#include "lockapputils.h"
+
+// ---------------------------------------------------------------------------
+// Two-phased constructor.
+// ---------------------------------------------------------------------------
+CLockAppPubSubObserver* CLockAppPubSubObserver::NewL(MLockAppObserverInterface* aObserver,
+        TUid aPubSubUid, TUint32 aKeyId )
+    {
+    CLockAppPubSubObserver* self = new (ELeave) CLockAppPubSubObserver(aObserver, aPubSubUid, aKeyId);
+    CleanupStack::PushL( self );
+    self->ConstructL( );
+    CleanupStack::Pop( self );
+    return self;
+    }
+
+// ---------------------------------------------------------------------------
+// C++ default constructor
+// ---------------------------------------------------------------------------
+CLockAppPubSubObserver::CLockAppPubSubObserver(MLockAppObserverInterface* aObserver,
+        TUid aPubSubUid, TUint32 aKeyId ) :
+    CActive( 0 ),
+    iObserver( aObserver ),
+    iPubSubUid( aPubSubUid ),
+    iKeyId( aKeyId ),
+    iValue( NULL )
+    {
+    }
+
+// ---------------------------------------------------------------------------
+// Destructor
+// ---------------------------------------------------------------------------
+CLockAppPubSubObserver::~CLockAppPubSubObserver( )
+    {
+    Cancel( );
+    iProperty.Close( );
+    }
+
+// ---------------------------------------------------------------------------
+// Symbian OS default constructor
+// ---------------------------------------------------------------------------
+void CLockAppPubSubObserver::ConstructL( )
+    {
+    // Add this active object to the scheduler.
+    CActiveScheduler::Add( this );
+    TInt err = iProperty.Attach( iPubSubUid, iKeyId );
+    ERROR_2(err, "CLockAppPubSubObserver::ConstructL - Property(%d,%d) attach", iPubSubUid, iKeyId);
+    User::LeaveIfError( err );
+    Start( );
+    }
+
+// ---------------------------------------------------------------------------
+// Starts listening
+// ---------------------------------------------------------------------------
+TInt CLockAppPubSubObserver::Start( )
+    {
+    if ( !IsActive( ) )
+        {
+        iStatus = KRequestPending;
+        iProperty.Subscribe( iStatus );
+        SetActive( );
+        return KErrNone;
+        }
+    else
+        {
+        return KErrInUse;
+        }
+    }
+
+// ---------------------------------------------------------------------------
+// Stops listening
+// ---------------------------------------------------------------------------
+void CLockAppPubSubObserver::Stop( )
+    {
+    if ( IsActive( ) )
+        {
+        Cancel( );
+        iProperty.Cancel( );
+        }
+    }
+
+// ---------------------------------------------------------------------------
+// Gets value of the key from P&S.
+// ---------------------------------------------------------------------------
+TInt CLockAppPubSubObserver::GetKeyValue(TInt& aValue )
+    {
+    RDebug::Printf( "%s %s (%u) 1=%x", __FILE__, __PRETTY_FUNCTION__, __LINE__, 1 );
+    return iProperty.Get( aValue );
+    }
+
+// ---------------------------------------------------------------------------
+// Sets a value for the key in P&S.
+// ---------------------------------------------------------------------------
+TInt CLockAppPubSubObserver::SetKeyValue(TInt aValue )
+    {
+    RDebug::Printf( "%s %s (%u) aValue=%x", __FILE__, __PRETTY_FUNCTION__, __LINE__, aValue );
+    return iProperty.Set( aValue );
+    }
+
+// ---------------------------------------------------------------------------
+// CLockAppPubSubObserver::RunL()
+// ---------------------------------------------------------------------------
+void CLockAppPubSubObserver::RunL( )
+    {
+    TInt value( NULL);
+    iProperty.Get( value );
+    if ( iValue != value )
+        {
+        // on value change
+        iValue = value;
+        if ( iObserver )
+            {
+            iObserver->HandlePubSubNotify( iPubSubUid, iKeyId, iValue );
+            }
+        }
+    // re-subscribe to events
+    Start( );
+    }
+
+// ---------------------------------------------------------------------------
+// Cancels event listening
+// ---------------------------------------------------------------------------
+void CLockAppPubSubObserver::DoCancel( )
+    {
+    iProperty.Cancel( );
+    }
+
+// End of file