diff -r 000000000000 -r f979ecb2b13e alarmui/src/PropertyObserver.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/alarmui/src/PropertyObserver.cpp	Tue Feb 02 10:12:19 2010 +0200
@@ -0,0 +1,152 @@
+/*
+* Copyright (c) 2006-2006 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: An observer and I/F class to observe Publish and Subscribe key changes.
+*
+*/
+
+
+
+// INCLUDE FILES
+#include "pim_trace.h"
+#include "PropertyObserver.h"
+
+
+// ============================ MEMBER FUNCTIONS ===============================
+
+// -----------------------------------------------------------------------------
+// CPropertyObserver::CPropertyObserver
+// C++ default constructor can NOT contain any code, that
+// might leave.
+// -----------------------------------------------------------------------------
+//
+CPropertyObserver::CPropertyObserver(MPropertyChangeHandler& aHandler, TUid aCategory, TUint aKey)
+: CActive( CActive::EPriorityStandard ),
+  iCategory( aCategory ),
+  iKey( aKey ),
+  iHandler( aHandler )
+{
+    TRACE_ENTRY_POINT;
+    TRACE_EXIT_POINT;
+}
+
+// -----------------------------------------------------------------------------
+// CPropertyObserver::ConstructL
+// Symbian 2nd phase constructor can leave.
+// -----------------------------------------------------------------------------
+//
+void CPropertyObserver::ConstructL(void)
+{
+    TRACE_ENTRY_POINT;
+    CActiveScheduler::Add( this );
+
+    User::LeaveIfError( iProperty.Attach( iCategory, iKey ) );
+
+    NotifyCurrentValue(); // for initial value
+
+    // Start observing...
+    Subscribe();
+    TRACE_EXIT_POINT;
+}
+
+// -----------------------------------------------------------------------------
+// CPropertyObserver::NewL
+// Two-phased constructor.
+// -----------------------------------------------------------------------------
+//
+CPropertyObserver* CPropertyObserver::NewL(MPropertyChangeHandler& aHandler, TUid aCategory, TUint aKey)
+{
+    TRACE_ENTRY_POINT;
+    CPropertyObserver* self = new( ELeave )CPropertyObserver( aHandler, aCategory, aKey );
+    CleanupStack::PushL( self );
+    self->ConstructL();
+    CleanupStack::Pop( self );
+    TRACE_EXIT_POINT;
+    return self;
+}
+
+// Destructor
+CPropertyObserver::~CPropertyObserver()
+{
+    TRACE_ENTRY_POINT;
+    Deque();
+    iProperty.Cancel();
+    iProperty.Close();
+    TRACE_EXIT_POINT;
+}
+
+// -----------------------------------------------------------------------------
+// CPropertyObserver::RunL
+// ?implementation_description
+// (other items were commented in a header).
+// -----------------------------------------------------------------------------
+//
+void CPropertyObserver::RunL(void)
+{
+    TRACE_ENTRY_POINT;
+    ASSERT( !(iStatus.Int()) );
+    if( iStatus.Int() == KErrNone )
+    {
+        Subscribe();
+        NotifyCurrentValue();
+    }
+    TRACE_EXIT_POINT;
+}
+
+// -----------------------------------------------------------------------------
+// CPropertyObserver::DoCancel
+// ?implementation_description
+// (other items were commented in a header).
+// -----------------------------------------------------------------------------
+//
+void CPropertyObserver::DoCancel(void)
+{
+    TRACE_ENTRY_POINT;
+    iProperty.Cancel();
+    TRACE_EXIT_POINT;
+}
+
+// -----------------------------------------------------------------------------
+// CPropertyObserver::Subscribe
+// ?implementation_description
+// (other items were commented in a header).
+// -----------------------------------------------------------------------------
+//
+void CPropertyObserver::Subscribe(void)
+{
+    TRACE_ENTRY_POINT;
+    iProperty.Subscribe( iStatus );
+    SetActive();
+    TRACE_EXIT_POINT;
+}
+
+// -----------------------------------------------------------------------------
+// CPropertyObserver::NotifyCurrentValue
+// ?implementation_description
+// (other items were commented in a header).
+// -----------------------------------------------------------------------------
+//
+void CPropertyObserver::NotifyCurrentValue(void)
+{
+    TRACE_ENTRY_POINT;
+    TInt value;
+
+    if( iProperty.Get( iCategory, iKey, value ) == KErrNone )
+    {
+        iHandler.HandlePropertyChange( iCategory, iKey, value );
+    }
+    TRACE_EXIT_POINT;
+}
+
+
+// End of File