messagingapp/msgui/appengine/src/conversationchangehandler.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Fri, 16 Apr 2010 14:56:15 +0300
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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:  ?Description
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 *
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 */
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#include "conversationchangehandler.h"
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// SYSTEM INCLUDES
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#include <ccsconversationentry.h>
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// USER INCLUDES
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#include "conversationsengine.h"
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#include "conversationsengine_p.h"
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#include "conversationsmodel.h"
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const TInt WindowSize = 7;
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// ---------------------------------------------------------------------------
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// Constructor
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// ---------------------------------------------------------------------------
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//
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ConversationsChangeHandler::ConversationsChangeHandler(
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    ConversationsEnginePrivate* convEnginePrivate,
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    ConversationsModel* conversationsModel) :
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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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    mConversationsModel(conversationsModel), 
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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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ConversationsChangeHandler::~ConversationsChangeHandler()
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{
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    mConversationEntryList.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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// This is for handling GetConversation results asynchronusly
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// from the server.
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// ---------------------------------------------------------------------------
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//
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void ConversationsChangeHandler::ConversationsL(RPointerArray<
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        CCsConversationEntry>& aConversationEntryList)
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{
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    mConversationEntryList.ResetAndDestroy();
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    for (TInt i = 0; i < aConversationEntryList.Count(); ++i)
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    {
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        CCsConversationEntry *entry = aConversationEntryList[i]->CloneL();
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        mConversationEntryList.AppendL(entry);
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    }
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    if (aConversationEntryList.Count() > 0)
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    {
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        mFirstWindowCached = EFalse;
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        mCurrentIndex = 0;
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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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        //This is done for safety
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        mConvEnginePrivate->registerForConversationUpdatesL();
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        mCurrentState = EListenToEvents;
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    }
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}
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// ---------------------------------------------------------------------------
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// Handling addition of new conversation entry from the server
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// ---------------------------------------------------------------------------
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//
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void ConversationsChangeHandler::AddConversation(
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    const CCsConversationEntry& aConvEntry)
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{
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    mConversationsModel->addRow(aConvEntry, true);
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    ConversationsEngine::instance()->emitConversationModelUpdated();
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}
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// ---------------------------------------------------------------------------
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// Handling modification of existing conversation entry from the server
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// ---------------------------------------------------------------------------
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//
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void ConversationsChangeHandler::ModifyConversation(
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    const CCsConversationEntry& aConvEntry)
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{
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    mConversationsModel->addRow(aConvEntry, true);
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    ConversationsEngine::instance()->emitConversationModelUpdated();
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}
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// ---------------------------------------------------------------------------
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// Handling deletion of conversation entry from the server
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// ---------------------------------------------------------------------------
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//
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void ConversationsChangeHandler::DeleteConversation(
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    const CCsConversationEntry& aConvEntry)
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{
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    mConversationsModel->deleteRow(aConvEntry.EntryId());
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    ConversationsEngine::instance()->emitConversationModelUpdated();
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}
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   120
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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 ConversationsChangeHandler::RefreshConversation()
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{
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}
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// ---------------------------------------------------------------------------
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// RunL
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// ---------------------------------------------------------------------------
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//
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void ConversationsChangeHandler::RunL()
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{
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    if (iStatus != KErrNone)
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    {
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        return;
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    }
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    //process
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    switch (mCurrentState)
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    {
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        case EInitialCache:
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            HandleConversationsL();
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            break;
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    }
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}
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// ---------------------------------------------------------------------------
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// DoCancel
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// ---------------------------------------------------------------------------
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//
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void ConversationsChangeHandler::DoCancel()
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{
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    mCurrentState = EListenToEvents;
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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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   161
void ConversationsChangeHandler::IssueRequest()
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{
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   163
    if (!IsActive())
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    {
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        iStatus = KRequestPending;
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   166
        TRequestStatus* status = &iStatus;
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   167
        SetActive();
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   168
        User::RequestComplete(status, KErrNone);
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   169
    }
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   170
}
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   171
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// ---------------------------------------------------------------------------
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//  Handles Conversations received from server and updates into model
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   174
// ---------------------------------------------------------------------------
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   175
//
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parents:
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   176
void ConversationsChangeHandler::HandleConversationsL()
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   177
{
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   178
    for (int i = 0; i < WindowSize; ++i)
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   179
    {
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   180
        if (mCurrentIndex < mConversationEntryList.Count())
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parents:
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   181
        {
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   182
            mConversationsModel->addRow(
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parents:
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   183
                * (mConversationEntryList[mCurrentIndex]));
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parents:
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   184
            mCurrentIndex++;
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parents:
diff changeset
   185
        }
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parents:
diff changeset
   186
        else
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parents:
diff changeset
   187
        {
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   188
            break;
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parents:
diff changeset
   189
        }
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parents:
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   190
    }
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parents:
diff changeset
   191
    if (mCurrentIndex < mConversationEntryList.Count())
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parents:
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   192
    {
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parents:
diff changeset
   193
        if (!mFirstWindowCached)
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parents:
diff changeset
   194
        {
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diff changeset
   195
            ConversationsEngine::instance()->emitConversationModelPopulated();
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parents:
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   196
            mFirstWindowCached = ETrue;
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parents:
diff changeset
   197
            return;
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parents:
diff changeset
   198
        }
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parents:
diff changeset
   199
        IssueRequest();
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parents:
diff changeset
   200
    }
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parents:
diff changeset
   201
    else
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parents:
diff changeset
   202
    {
238255e8b033 Revision: 201011
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parents:
diff changeset
   203
        if (!mFirstWindowCached)
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parents:
diff changeset
   204
        {
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parents:
diff changeset
   205
            ConversationsEngine::instance()->emitConversationModelPopulated();
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parents:
diff changeset
   206
            mFirstWindowCached = ETrue;
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parents:
diff changeset
   207
        }
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parents:
diff changeset
   208
        mConversationEntryList.ResetAndDestroy();
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parents:
diff changeset
   209
        mConvEnginePrivate->registerForConversationUpdatesL();
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parents:
diff changeset
   210
        mCurrentState = EListenToEvents;
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parents:
diff changeset
   211
    }
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parents:
diff changeset
   212
}
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parents:
diff changeset
   213
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parents:
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   214
// ---------------------------------------------------------------------------
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parents:
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   215
//  Starts fetching remaining conversations
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parents:
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   216
// ---------------------------------------------------------------------------
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parents:
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   217
//
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parents:
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   218
void ConversationsChangeHandler::restartHandleConversations()
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parents:
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   219
{
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parents:
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   220
    IssueRequest();
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parents:
diff changeset
   221
}
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parents:
diff changeset
   222
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parents:
diff changeset
   223
//EOF