menufw/menufwui/matrixmenu/src/mmpropertysubscriber.cpp
changeset 0 f72a12da539e
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/menufw/menufwui/matrixmenu/src/mmpropertysubscriber.cpp	Thu Dec 17 08:40:49 2009 +0200
@@ -0,0 +1,97 @@
+/*
+* 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".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:  Subscribes properties from P&S
+ *
+*/
+
+
+#include "mmpropertysubscriber.h"
+
+// -----------------------------------------------------------------------------
+// -----------------------------------------------------------------------------
+//
+CMmPropertySubscriber::CMmPropertySubscriber(MMmPropertyChangeObserver& aObserver) 
+    : CActive( EPriorityStandard ),
+    iPropertyChangeObserver(aObserver)
+     {
+     }
+
+// -----------------------------------------------------------------------------
+// -----------------------------------------------------------------------------
+//
+CMmPropertySubscriber* CMmPropertySubscriber::NewLC(
+    const TUid aUid, 
+    const TUint32 aKey,
+    MMmPropertyChangeObserver& aObserver)
+    {
+    CMmPropertySubscriber* self = new ( ELeave ) CMmPropertySubscriber(aObserver);
+    CleanupStack::PushL(self);
+    self->ConstructL(aUid,aKey);
+    return self;
+    }
+// -----------------------------------------------------------------------------
+// -----------------------------------------------------------------------------
+//
+CMmPropertySubscriber* CMmPropertySubscriber::NewL(
+    const TUid aUid, 
+    const TUint32 aKey,
+    MMmPropertyChangeObserver& aObserver)
+    {
+    CMmPropertySubscriber* self = CMmPropertySubscriber::NewLC(aUid,aKey,aObserver);
+    CleanupStack::Pop(); // self;
+    return self;
+    }
+// -----------------------------------------------------------------------------
+// -----------------------------------------------------------------------------
+//
+void CMmPropertySubscriber::ConstructL(
+    const TUid aUid, 
+    const TUint32 aKey)
+    {
+    User::LeaveIfError( iProperty.Attach( aUid, aKey ) );
+    CActiveScheduler::Add( this); // Add to scheduler
+    // initial subscription and process current property value
+    RunL();
+    }
+// -----------------------------------------------------------------------------
+// -----------------------------------------------------------------------------
+//
+CMmPropertySubscriber::~CMmPropertySubscriber()
+    {
+    Cancel(); // Cancel any request, if outstanding
+    iProperty.Close();
+    }
+// -----------------------------------------------------------------------------
+// -----------------------------------------------------------------------------
+//
+void CMmPropertySubscriber::DoCancel()
+    {
+    iProperty.Close();
+    }
+// -----------------------------------------------------------------------------
+// -----------------------------------------------------------------------------
+//
+void CMmPropertySubscriber::RunL()
+    {
+    // resubscribe before processing new value to prevent missing updates
+    iProperty.Subscribe( iStatus );
+    SetActive();
+     
+    TInt intValue;
+    if( iProperty.Get( intValue ) != KErrNotFound )
+        {
+        iPropertyChangeObserver.PropertyChangedL(intValue);
+        }
+    }
+