diff -r 000000000000 -r 2e3d3ce01487 mediakeys/MMKeyBearer/src/MMKeyBearerObserver.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mediakeys/MMKeyBearer/src/MMKeyBearerObserver.cpp	Tue Feb 02 10:12:00 2010 +0200
@@ -0,0 +1,192 @@
+/*
+* Copyright (c) 2005-2008 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: 
+*
+*/
+
+
+//INCLUDE
+#include <e32def.h>
+#include <e32cmn.h>
+
+#include <mediakeysinternalpskeys.h>
+#include <UsbWatcherInternalPSKeys.h>
+#include "MMKeyBearerObserverPS.h"
+#include "trace.h"
+
+// ================= MEMBER FUNCTIONS =======================
+//
+// ----------------------------------------------------------
+// CMMKeyBearerObserver::NewL()
+// Constructs a new entry with given values.
+// ----------------------------------------------------------
+//
+CMMKeyBearerObserver* CMMKeyBearerObserver::NewL(MCallBackReceiver& aCallback,
+                                             TInt aKeyType)
+    {
+    FUNC_LOG;
+
+    CMMKeyBearerObserver* self = new (ELeave) CMMKeyBearerObserver(aCallback);
+    CleanupStack::PushL(self);
+    self->ConstructL(aKeyType);
+    CleanupStack::Pop();
+    return self;
+    }
+// ----------------------------------------------------------
+// CMMKeyBearerObserver::CMMKeyBearerObserver()
+// C++ constructor
+// ----------------------------------------------------------
+//
+CMMKeyBearerObserver::CMMKeyBearerObserver(MCallBackReceiver& aCallback)
+    :  CActive(EPriorityStandard) ,iCallback(aCallback)
+    {
+    FUNC_LOG;
+
+    //Pass
+    }
+// ----------------------------------------------------------
+// CMMKeyBearerObserver::CMMKeyBearerObserver()
+// Destructor
+// ----------------------------------------------------------
+//
+CMMKeyBearerObserver::~CMMKeyBearerObserver()
+    {
+    FUNC_LOG;
+
+    Cancel();
+    }
+// ----------------------------------------------------------
+// CMMKeyBearerObserver::ConstructL()
+// Symbian OS default constructor
+// ----------------------------------------------------------
+//
+void CMMKeyBearerObserver::ConstructL(TInt aKeyType)
+    {
+    FUNC_LOG;
+
+    iKeyType = aKeyType;
+
+    // Add this active object to the scheduler.
+    CActiveScheduler::Add(this);
+    Start();
+    }
+// ----------------------------------------------------------
+// CMMKeyBearerObserver::Start()
+// Starts listening KUidCurrentCall event
+// ----------------------------------------------------------
+//
+TInt CMMKeyBearerObserver::Start()
+    {
+    FUNC_LOG;
+
+    if (IsActive())
+        {
+        ERROR( KErrInUse, "Start observing" );
+        return KErrInUse;
+        }
+
+    iProperty.Close();
+    iStatus = KRequestPending;
+    if (iKeyType == ESideVolumeKeys)
+        {
+        iProperty.Attach(KPSUidMediaKeysEventNotifier,
+                         KMediaKeysVolumeKeyEvent);
+        }
+    else if (iKeyType == EMediaKeys)
+        {
+        iProperty.Attach(KPSUidMediaKeysEventNotifier,
+                         KMediaKeysControlKeyEvent);
+        }
+    else if (iKeyType == EAccessoryVolumeKeys)
+        {
+        iProperty.Attach(KPSUidMediaKeysEventNotifier,
+                         KMediaKeysAccessoryVolumeEvent);
+        }
+    else if (iKeyType == EFileTransferStatus)
+        {
+        iProperty.Attach(KPSUidUsbWatcher,
+                         KUsbWatcherSelectedPersonality);
+        }
+    iProperty.Subscribe(iStatus);
+
+    SetActive();
+
+    INFO_1( "Start observing: iKeyType = %d", iKeyType );
+
+    return KErrNone;
+    }
+// ----------------------------------------------------------
+// CMMKeyBearerObserver::Stop()
+// Stops listening KUidCurrentCall event
+// ----------------------------------------------------------
+//
+void CMMKeyBearerObserver::Stop()
+    {
+    FUNC_LOG;
+
+    Cancel();
+    }
+// ----------------------------------------------------------
+// CMMKeyBearerObserver::RunL()
+//
+// ----------------------------------------------------------
+//
+void CMMKeyBearerObserver::RunL()
+    {
+    FUNC_LOG;
+
+    TInt scanCode;
+    iProperty.Get( scanCode);
+
+    ERROR_1( iStatus.Int(), "Observed key failed: keyType = %d", iKeyType );
+    INFO_2( "Observed key: keyType = %d, scanCode = %d", iKeyType, scanCode );
+
+    // If this Active Object is for receiving the USB MTP status, the
+    // scanCode varibale contains the status whether transfer is
+    // happening now(active) or not(not active).
+
+    iCallback.ReceivedKeyEvent(scanCode, iKeyType);
+    }
+// ----------------------------------------------------------
+// CMMKeyBearerObserver::DoCancel()
+// Cancels event listening
+// ----------------------------------------------------------
+//
+void CMMKeyBearerObserver::DoCancel()
+    {
+    FUNC_LOG;
+
+    iProperty.Cancel();
+    iProperty.Close();
+    }
+
+// ----------------------------------------------------------
+// CMMKeyBearerObserver::GetValue()
+//
+// ----------------------------------------------------------
+//
+TInt CMMKeyBearerObserver::GetValue()
+    {
+    FUNC_LOG;
+
+    TInt ret = 0;
+    TInt err = iProperty.Get( ret );
+    if ( err != KErrNone )
+        {
+        ERROR_1( err, "Observer value read failed: keyType = %d", iKeyType );
+        }
+    return ret;
+    }
+
+// End of file