fep/aknfep/src/AknFepUiInputStatePredictiveCandidateStroke.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 02 Feb 2010 01:02:04 +0200
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/*
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* Copyright (c) 2002 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:           
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*       Provides the TAknFepInputStatePredictiveCandidateStroke methods.
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*
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*/
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#include "AknFepUiInputStatePredictiveCandidateStroke.h"
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#include "AknFepUIManagerStateInterface.h"  //MAknFepUIManagerStateInterface
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#include "AknFepManagerUIInterface.h"       //MAknFepManagerUIInterface
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#include "AknFepUICtrlCandidatePane.h"      //MAknFepUICtrlCandidatePane
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#include <PtiEngine.h>                      //CPtiEngine
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TAknFepInputStatePredictiveCandidateStroke::TAknFepInputStatePredictiveCandidateStroke(
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                                MAknFepUIManagerStateInterface* aOwner,
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                                MAknFepUICtrlContainerChinese* aUIContainer)
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    :TAknFepInputStateCandidateChinese(aOwner, aUIContainer)
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    {
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    iState = EPredictiveCandidate;
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    MAknFepUICtrlContainerChinese* uiContainer = UIContainer();
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    // set container window position to follow cursor
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    TPoint baseLine = TPoint(0,0);
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    TInt height = 0;
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    TInt ascent = 0;
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    TRAPD(ret,iOwner->FepMan()->GetScreenCoordinatesL(baseLine,height,ascent));
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    if (ret == KErrNone)
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        {
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        uiContainer->SetContainerPosition(baseLine, height);    
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        }
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    uiContainer->FocusCandidatePane(ETrue);
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    uiContainer->SetLayout(MAknFepUICtrlContainerChinese::ELayoutCandidate);
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    CPtiEngine* ptiengine = iOwner->PtiEngine();
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    ptiengine->SetCandidatePageLength(MAknFepUICtrlContainerChinese::ELayoutInput);
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    // for some reason needs to feed back to ptiengine current Chinese char just before get the prediction
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    TPtrC text = uiContainer->CandidatePane()->CurrentCandidate();
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    uiContainer->CandidatePane()->SelectFirst(); 
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    ptiengine->SetPredictiveChineseChar(text);
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    uiContainer->CandidatePane()->SetCandidateBuffer(ptiengine->CandidatePage());
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    TBool multiplePages = ptiengine->MoreCandidatePages();
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    TInt bufLength = ptiengine->CandidatePage().Length();
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    TBool showHorizontalScrollArrows = multiplePages || bufLength>1;
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    uiContainer->ShowVerticalScrollArrows(multiplePages);
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    uiContainer->ShowHorizontalScrollArrows(showHorizontalScrollArrows);
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    uiContainer->CandidatePane()->ShowCandidateOrdinals(EFalse);    
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    }
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TBool TAknFepInputStatePredictiveCandidateStroke::HandleKeyL(TInt aKey, TKeyPressLength aLength)
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    {
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    if (aKey == EPtiKey0 || aKey == EPtiKey7 ||
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        aKey == EPtiKey8 || aKey == EPtiKey9)
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        {
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        iOwner->FepMan()->TryCloseUiL();
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        return EFalse;
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        }
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    TBool ret = ETrue;
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    if(aLength == ELongKeyPress) 
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        {
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        return ret;
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        }
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    if(iOwner->IsValidChineseInputKey(aKey))
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        {
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        CPtiEngine* ptiengine = iOwner->PtiEngine();
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        // it is needed when we use phrase input engine, otherwise it seems not cleared
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        ptiengine->ClearCurrentWord(); 
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        ptiengine->ResetToneMark();
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        iOwner->ChangeState(EEntry);
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        ret = EFalse; //passes to entry state to handle the key
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        }
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    if(!HandleVerticalNavigation(aKey))
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        {
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        if (aKey == EKeyLeftArrow || aKey == EKeyRightArrow || aKey == EKeyOK)
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            {
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            iOwner->ChangeState(EPredictiveInput);
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            ret = EFalse; //passes to predictive input state to handle the key
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            }
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        else if(aKey == EKeyBackspace)
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            {
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            iOwner->FepMan()->TryCloseUiL();
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            }
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        else if (aKey == EPtiKeyStar)
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            {
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            ret = TAknFepInputStateCandidateChinese::HandleKeyL(aKey, aLength);
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            }   
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        }
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    return ret;
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    }