emailuis/emailui/src/FreestyleEmailUiPropertySubscriber.cpp
changeset 0 8466d47a6819
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/emailuis/emailui/src/FreestyleEmailUiPropertySubscriber.cpp	Thu Dec 17 08:39:21 2009 +0200
@@ -0,0 +1,127 @@
+/*
+ * Copyright (c) 2009 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: Used for observing property changes and notifying listeners.
+ *
+ */
+
+// CLASS HEADER
+#include "FreestyleEmailUiPropertySubscriber.h"
+
+
+// CONSTRUCTION AND DESTRUCTION
+
+// -----------------------------------------------------------------------------
+// Private C++ constructor.  
+// -----------------------------------------------------------------------------
+//
+CFreestyleEmailUiPropertySubscriber::CFreestyleEmailUiPropertySubscriber(
+	MFreestyleEmailUiPropertyChangedObserver& aObserver ) 
+    : CActive( EPriorityStandard ),
+    iPropertyChangeObserver( aObserver )
+	{
+	// No implementation required.
+    }
+
+
+// -----------------------------------------------------------------------------
+// Two-phase constructor.
+// -----------------------------------------------------------------------------
+//
+CFreestyleEmailUiPropertySubscriber* CFreestyleEmailUiPropertySubscriber::NewLC(
+    const TUid aUid, 
+    const TUint32 aKey,
+    MFreestyleEmailUiPropertyChangedObserver& aObserver )
+	{
+    CFreestyleEmailUiPropertySubscriber* self =
+		new ( ELeave ) CFreestyleEmailUiPropertySubscriber( aObserver );
+    CleanupStack::PushL( self );
+    self->ConstructL( aUid, aKey );
+    return self;
+    }
+
+
+// -----------------------------------------------------------------------------
+// Two-phase constructor.
+// -----------------------------------------------------------------------------
+//
+CFreestyleEmailUiPropertySubscriber* CFreestyleEmailUiPropertySubscriber::NewL(
+    const TUid aUid, 
+    const TUint32 aKey,
+    MFreestyleEmailUiPropertyChangedObserver& aObserver )
+    {
+    CFreestyleEmailUiPropertySubscriber* self =
+		CFreestyleEmailUiPropertySubscriber::NewLC( aUid, aKey, aObserver );
+    CleanupStack::Pop( self );
+    return self;
+    }
+
+
+// -----------------------------------------------------------------------------
+// Second phase constructor.
+// -----------------------------------------------------------------------------
+//
+void CFreestyleEmailUiPropertySubscriber::ConstructL( const TUid aUid,
+													const TUint32 aKey )
+    {
+    User::LeaveIfError( iProperty.Attach( aUid, aKey ) );
+    CActiveScheduler::Add( this ); // Add to scheduler.
+    // The initial subscription and processing of the current property value.
+    RunL();
+    }
+
+
+// -----------------------------------------------------------------------------
+// Destructor.
+// -----------------------------------------------------------------------------
+//
+CFreestyleEmailUiPropertySubscriber::~CFreestyleEmailUiPropertySubscriber()
+    {
+    Cancel(); // Cancel any pending request.
+    iProperty.Close();
+    }
+
+
+// PRIVATE METHODS FROM CACTIVE
+
+// -----------------------------------------------------------------------------
+// Handles completion.
+// -----------------------------------------------------------------------------
+//
+void CFreestyleEmailUiPropertySubscriber::RunL()
+    {
+    // Resubscribe before processing a new value in order to prevent missing
+    // updates.
+    iProperty.Subscribe( iStatus );
+    SetActive();
+     
+    TInt intValue( 0 );
+
+    if ( iProperty.Get( intValue ) == KErrNone )
+    	{
+        iPropertyChangeObserver.PropertyChangedL( intValue );
+        }
+    }
+
+
+// -----------------------------------------------------------------------------
+// Cancels the pending requests.
+// -----------------------------------------------------------------------------
+//
+void CFreestyleEmailUiPropertySubscriber::DoCancel()
+    {
+    iProperty.Cancel();
+    }
+
+
+// End of file.