messagingapp/msgui/appengine/src/conversationlistchangehandler.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Fri, 11 Jun 2010 13:35:48 +0300
changeset 34 84197e66a4bd
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child 37 518b245aa84c
permissions -rw-r--r--
Revision: 201021 Kit: 2010123
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/*
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 * Copyright (c) 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:  This Class handles Add, Delete & Modify conversation list client events.
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 *
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 */
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#include "conversationlistchangehandler.h"
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// SYSTEM INCLUDES
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#include <ccsconversationentry.h>
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#include <ccsclientconversation.h>
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// USER INCLUDE
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#include "conversationsengine_p.h"
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#include "conversationsengine.h"
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#include "conversationssummarymodel.h"
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TInt ListWindowSize = 7;
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// ---------------------------------------------------------------------------
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// Constructor
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// ---------------------------------------------------------------------------
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//
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ConversationsListChangeHandler::ConversationsListChangeHandler(
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    ConversationsEnginePrivate* convEnginePrivate,
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    ConversationsSummaryModel* conversationsSummaryModel) :
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    CActive(EPriorityStandard), 
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    mCurrentState(EInit),
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    mFirstWindowCached(EFalse),
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    mCurrentIndex(-1),     
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    mConvSummaryModel(conversationsSummaryModel), 
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    mConvEnginePrivate(convEnginePrivate)
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{
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    CActiveScheduler::Add(this);
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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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ConversationsListChangeHandler::~ConversationsListChangeHandler()
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{
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    mClientConversationList.ResetAndDestroy();
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    // Cancel the active object
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    Cancel();
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}
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//-----------------------------------------------------------------------
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// From CActive class.
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//-----------------------------------------------------------------------
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//
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void ConversationsListChangeHandler::RunL()
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{
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    if (iStatus != KErrNone)
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    {
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        // Reading events has failed
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        return;
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    }
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    else
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    {
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        switch (mCurrentState)
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        {
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            case EInitialCache:
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            {
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                HandleConversationListL();
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                break;
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            }
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        }
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    }
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}
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//-----------------------------------------------------------------------
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// From CActive class.
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//-----------------------------------------------------------------------
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//
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void ConversationsListChangeHandler::DoCancel()
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{
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    mCurrentState = EListenToEvents;
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}
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//-----------------------------------------------------------------------
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// From CActive class.
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//-----------------------------------------------------------------------
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//
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void ConversationsListChangeHandler::ConversationListL(RPointerArray<
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        CCsClientConversation>& aClientConversationList)
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{
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    mClientConversationList.ResetAndDestroy();
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    for (TInt i = 0; i < aClientConversationList.Count(); ++i)
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    {        
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        CCsClientConversation *entry = aClientConversationList[i]->CloneL();
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        mClientConversationList.AppendL(entry);
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    }
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    if (aClientConversationList.Count() > 0)
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    {
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        mCurrentIndex = 0;
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        mFirstWindowCached = EFalse;
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        mCurrentState = EInitialCache;
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        IssueRequest();
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    }
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    else
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    {
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        mConvEnginePrivate->registerForConversationListUpdatesL();
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        mCurrentState = EListenToEvents;
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    }
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}
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//-----------------------------------------------------------------------
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// This is for handling new conversation event asynchronusly from the server
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//-----------------------------------------------------------------------
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//
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void ConversationsListChangeHandler::AddConversationList(
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    const CCsClientConversation& aClientConversation)
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{
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    mConvSummaryModel->addRow(aClientConversation);
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}
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//-----------------------------------------------------------------------
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// This is for handling delete conversation event asynchronusly from the server
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//-----------------------------------------------------------------------
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//
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void ConversationsListChangeHandler::DeleteConversationList(
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    const CCsClientConversation& aClientConversation)
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{
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    mConvSummaryModel->deleteRow(aClientConversation.GetConversationEntryId());
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}
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//-----------------------------------------------------------------------
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// This is for handling modify conversation event asynchronusly from the server
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//-----------------------------------------------------------------------
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//
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void ConversationsListChangeHandler::ModifyConversationList(
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    const CCsClientConversation& aClientConversation)
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{
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    mConvSummaryModel->addRow(aClientConversation);
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}
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//-----------------------------------------------------------------------
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// This is for handling refresh conversation event asynchronusly from the server
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//-----------------------------------------------------------------------
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//
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void ConversationsListChangeHandler::RefreshConversationList()
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{
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}
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// ---------------------------------------------------------------------------
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// Make the active object alive.
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// ---------------------------------------------------------------------------
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//
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void ConversationsListChangeHandler::IssueRequest()
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{
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    if (!IsActive())
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    {
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        iStatus = KRequestPending;
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        TRequestStatus* status = &iStatus;
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        SetActive();
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        User::RequestComplete(status, KErrNone);
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    }
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}
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// ---------------------------------------------------------------------------
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// Handles Conversation List received from server and updates into model
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// ---------------------------------------------------------------------------
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//
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void ConversationsListChangeHandler::HandleConversationListL()
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{
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    for (int i = 0; i < ListWindowSize; ++i)
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    {
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        if (mCurrentIndex < mClientConversationList.Count())
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        {
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            mConvSummaryModel->addRow(
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                * (mClientConversationList[mCurrentIndex]));
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            mCurrentIndex++;
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        }
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        else
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        {
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            break;
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        }
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    }
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    if (mCurrentIndex < mClientConversationList.Count())
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    {
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        if (!mFirstWindowCached)
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        {
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            ConversationsEngine::instance()->
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                                           emitConversationListModelPopulated();
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            mFirstWindowCached = ETrue;
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        }
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        IssueRequest();
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    }
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    else
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    {
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        if (!mFirstWindowCached)
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        {
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            ConversationsEngine::instance()->
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                                           emitConversationListModelPopulated();
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            mFirstWindowCached = ETrue;
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        }
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        mClientConversationList.ResetAndDestroy();
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        mConvEnginePrivate->registerForConversationListUpdatesL();
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        mCurrentState = EListenToEvents;
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    }
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}
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// EOF