mmsharing/mmshui/src/musuicallbackservice.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Wed, 09 Jun 2010 09:37:52 +0300
branchRCL_3
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/*
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* Copyright (c) 2005-2006 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:  Asynchronous callback service provider.
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*
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*/
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#include "musuicallbackservice.h"
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#include "musuicallbackobserver.h" // callback observer interface
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#include "muslogger.h"
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// -----------------------------------------------------------------------------
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// Two-phased constructor.
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// -----------------------------------------------------------------------------
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//
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CMusUiCallbackService* CMusUiCallbackService::NewL(
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                        MMusUiCallbackObserver& aCallbackObserver )
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    {
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    CMusUiCallbackService* self =
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                            new ( ELeave ) CMusUiCallbackService(
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                                                    aCallbackObserver );
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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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CMusUiCallbackService::~CMusUiCallbackService()
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    {
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    // Cancel active object
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    MUS_LOG( "mus: [MUSUI ]  -> CMusUiCallbackService::~CMusUiCallbackService" );
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    Cancel();
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    MUS_LOG( "mus: [MUSUI ]  <- CMusUiCallbackService::~CMusUiCallbackService" );
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    }
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// -----------------------------------------------------------------------------
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// C++ default constructor.
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// -----------------------------------------------------------------------------
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//
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CMusUiCallbackService::CMusUiCallbackService(
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                        MMusUiCallbackObserver& aCallbackObserver )
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    : CActive( EPriorityStandard ),
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    iCallbackObserver( aCallbackObserver ),
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    iEventId( EMusUiAsyncUninitialized )
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    {
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    CActiveScheduler::Add( this );
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    }
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// -----------------------------------------------------------------------------
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//
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// -----------------------------------------------------------------------------
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//
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void CMusUiCallbackService::ConstructL()
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    {
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    }
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// -----------------------------------------------------------------------------
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// Buffer a request to trigger an event.
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// -----------------------------------------------------------------------------
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//
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void CMusUiCallbackService::AsyncEventL( TMusUiAsyncEvent aEventId )
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    {
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    MUS_LOG( "mus: [MUSUI ]  -> CMusUiCallbackService::AsyncEventL" );
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    iEventId = aEventId;
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    Activate();
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    MUS_LOG( "mus: [MUSUI ]  <- CMusUiCallbackService::AsyncEventL" );
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    }
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// -----------------------------------------------------------------------------
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// Cancels the active request.
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// -----------------------------------------------------------------------------
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//
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void CMusUiCallbackService::Cancel()
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    {
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    MUS_LOG( "mus: [MUSUI ]  -> CMusUiCallbackService::Cancel" );
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    CActive::Cancel();
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    iStatus = NULL;
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    MUS_LOG( "mus: [MUSUI ]  <- CMusUiCallbackService::Cancel" );
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    }
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// -----------------------------------------------------------------------------
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// Check what event is currently pending.
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// -----------------------------------------------------------------------------
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//
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TMusUiAsyncEvent CMusUiCallbackService::CurrentEvent() const
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    {
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    if ( IsActive() )
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        {
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        return iEventId;
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        }
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    return EMusUiAsyncUninitialized;
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    }
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// -----------------------------------------------------------------------------
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// From CActive.  Called when a request completes.
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// -----------------------------------------------------------------------------
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//
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void CMusUiCallbackService::RunL()
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    {
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    MUS_LOG( "mus: [MUSUI ]  -> CMusUiCallbackService::RunL" );
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    if ( iEventId )
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        {
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        // Copy the id from member to local so the member can be cleared.
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        TMusUiAsyncEvent eventId = iEventId;
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        iEventId = EMusUiAsyncUninitialized;
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        // Issue the call to the observer interface.
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        iCallbackObserver.HandleAsyncEventL( eventId );
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        MUS_LOG( "mus: [MUSUI ]  <- CMusUiCallbackService::RunL returns" );
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        return;
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        }
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    MUS_LOG( "mus: [MUSUI ]  <- CMusUiCallbackService::RunL" );
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    }
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// -----------------------------------------------------------------------------
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// From CActive.  Called when a leave occurres in RunL.
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// -----------------------------------------------------------------------------
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//
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TInt CMusUiCallbackService::RunError( TInt aError )
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    {
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    MUS_LOG1( "mus: [MUSUI ]        CMusUiCallbackService::RunError [%d]",
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                            aError );
21
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    iCallbackObserver.HandleAsyncError( aError );
0
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21
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    return KErrNone;
0
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    }
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// -----------------------------------------------------------------------------
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// From CActive.  Called when a request is cancelled.
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// -----------------------------------------------------------------------------
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//
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void CMusUiCallbackService::DoCancel()
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    {
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    MUS_LOG( "mus: [MUSUI ]  -> CMusUiCallbackService::DoCancel" );
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    MUS_LOG( "mus: [MUSUI ]  <- CMusUiCallbackService::DoCancel" );
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    }
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// -----------------------------------------------------------------------------
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// Activate the object.
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// -----------------------------------------------------------------------------
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//
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void CMusUiCallbackService::Activate()
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    {
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    MUS_LOG( "mus: [MUSUI ]  -> CMusUiCallbackService::Activate" );
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    // Call SetActive() so RunL() will be called by the active scheduler
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    if ( IsActive() )
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        {
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        Cancel();
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        }
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    SetPriority( EPriorityHigh );
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    SetActive();
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    iStatus = KRequestPending;
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    TRequestStatus* stat = &iStatus;
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    User::RequestComplete( stat, KErrNone );
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    MUS_LOG( "mus: [MUSUI ]  <- CMusUiCallbackService::Activate" );
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    }
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