musichomescreen/mcpmusicplayer/src/pnsmonitor.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 17 Dec 2009 08:45:05 +0200
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/*
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* Copyright (c) 2008-2008 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:  Monitors the file system for changes in a file.
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*
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*/
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#include <mpxlog.h>
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#include <mpxconstants.h>
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#include "pnsmonitor.h"
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#include "pnsmonitorobserver.h"
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// RProperty key to identify the case when Music Player launching
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// in the background
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const TInt KMPXLaunchingOnBackground( 100 );
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// ---------------------------------------------------------------------------
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// Constructor
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// ---------------------------------------------------------------------------
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//
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CPNSMonitor::CPNSMonitor( MPNSMonitorObserver& aObserver )
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        : CActive( CActive::EPriorityLow ),
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        iObserver( aObserver )
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    {
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    }
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// ---------------------------------------------------------------------------
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// Second Phase Constructor
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// ---------------------------------------------------------------------------
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//
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void CPNSMonitor::ConstructL()
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    {
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    User::LeaveIfError( iPropertyHandler.Attach( KAppUidMusicPlayerX,
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            KMPXLaunchingOnBackground ) );
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    CActiveScheduler::Add( this );
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    }
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// ---------------------------------------------------------------------------
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// Two-phased constructor
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// ---------------------------------------------------------------------------
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//
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CPNSMonitor* CPNSMonitor::NewL( MPNSMonitorObserver& aObserver )
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    {
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    CPNSMonitor* self = new( ELeave ) CPNSMonitor( aObserver );
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    CleanupStack::PushL( self );
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    self->ConstructL();
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    CleanupStack::Pop( self );
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    return self;
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    }
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// ---------------------------------------------------------------------------
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// Destructor
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// ---------------------------------------------------------------------------
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//
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CPNSMonitor::~CPNSMonitor()
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    {
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    Cancel();
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    iPropertyHandler.Close();
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    }
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// ---------------------------------------------------------------------------
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// Starts monitoring
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// ---------------------------------------------------------------------------
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//
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void CPNSMonitor::Start()
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    {
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    MPX_DEBUG1("CPNSMonitor::Start <---");
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    iPropertyHandler.Subscribe( iStatus );
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    SetActive();
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    MPX_DEBUG1("CPNSMonitor::Start --->");
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    }
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// ---------------------------------------------------------------------------
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// RunL callback
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// ---------------------------------------------------------------------------
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//
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void CPNSMonitor::RunL()
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    {
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    MPX_DEBUG1("CPNSMonitor::RunL <---");
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    TInt ret( 0 );
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    TInt err = RProperty::Get( KAppUidMusicPlayerX,
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                KMPXLaunchingOnBackground,
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                ret );
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    if ( ret )
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        {
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        iObserver.OpeningMusicPlayer();
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        MPX_DEBUG1("CPNSMonitor::RunL - Opening Music Player on the background");
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        }
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	// Listen again
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    Start();
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    MPX_DEBUG1("CPNSMonitor::RunL --->");
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    }
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// ---------------------------------------------------------------------------
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// Handle Cancelling
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// ---------------------------------------------------------------------------
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//
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void CPNSMonitor::DoCancel()
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    {
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    MPX_DEBUG1("CPNSMonitor::DoCancel <---");
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    // Stop monitoring
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    iPropertyHandler.Cancel();
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    MPX_DEBUG1("CPNSMonitor::DoCancel --->");
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    }
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// ----------------------------------------------------------------------------
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// Handles a leave occurring in the request completion event handler RunL()
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// ----------------------------------------------------------------------------
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//
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TInt CPNSMonitor::RunError( TInt aError )
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    {
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    MPX_DEBUG2("CPNSMonitor::RunError(%d)", aError );
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    // Listen again
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    Start();
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    return KErrNone;
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    }