uifw/eikctl/src/aknuniteditor.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 11 May 2010 16:27:42 +0300
branchRCL_3
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Revision: 201017 Kit: 201019
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/*
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* Copyright (c) 2006-2007 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:  Unit MFNE
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*
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*/
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#include <barsread.h>
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#include <eikmfne.pan>
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#include <e32math.h>
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#include <eikon.hrh>
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#include <eikctl.rsg>
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#include <StringLoader.h>
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#include <AknUtils.h>
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#include <AknTasHook.h>
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#include "aknmfnefloat.h"
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#include "aknmfneseparator.h"
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#include "aknuniteditor.h"
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const TInt KAknNumberOfFields( 3 );
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const TInt KAknMaxAllowedFractionalDigits( 8 );
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const TInt KAknResourceTable[] =
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        {
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        0,
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        R_AVKON_UNIT_EDITOR_METER,
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        R_AVKON_UNIT_EDITOR_KILOMETER,
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        R_AVKON_UNIT_EDITOR_FOOT,
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        R_AVKON_UNIT_EDITOR_MILE,
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        R_AVKON_UNIT_EDITOR_METR_SPEED,
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        R_AVKON_UNIT_EDITOR_IMPER_SPEED
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        };
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// ---------------------------------------------------------------------------
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// A utility function to copy from source to destination with a length
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// check. If source is larger than destination, the function returns the
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// length of the source. This value can then be passed to client (where
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// source length is not necessarily known) for allocating a buffer.
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// ---------------------------------------------------------------------------
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static TInt CopyDescOrNull( TDes& aDestination, const TDesC& aSource )
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    {
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    TInt sourceLength( aSource.Length() );
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    if ( aDestination.MaxLength() >= sourceLength )
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        {
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        aDestination.Copy( aSource );
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        sourceLength = 0;
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        }
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    return sourceLength;
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    }
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// ======== MEMBER FUNCTIONS ========
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CAknUnitEditor::CAknUnitEditor() : iUnitLimit( sizeof( KAknResourceTable ) / sizeof( TInt ) )
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    {
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    }
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EXPORT_C CAknUnitEditor* CAknUnitEditor::NewL()
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    {
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    CAknUnitEditor* self = CAknUnitEditor::NewLC();
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    CleanupStack::Pop( self );
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    return self;
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    }
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EXPORT_C CAknUnitEditor* CAknUnitEditor::NewLC()
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    {
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    CAknUnitEditor* self = new( ELeave ) CAknUnitEditor;
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    CleanupStack::PushL( self );
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    AKNTASHOOK_ADDL( self, "CAknUnitEditor" );
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    return self;
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    }
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EXPORT_C CAknUnitEditor::~CAknUnitEditor()
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    {
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    AKNTASHOOK_REMOVE();
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    }
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EXPORT_C void CAknUnitEditor::ConstructL(
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        TReal aMinimumValue, TReal aMaximumValue,
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        TReal aInitialValue, 
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        TInt aMaxFractionalDigits, TInt aUnit, TUint aFlags )
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    {
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    // No other construction so this function could be called again
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    if ( !SupportsUnit( aUnit ) )
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        {
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        User::Leave( KErrNotSupported );
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        }
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    CreateFieldArrayL( KAknNumberOfFields );
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    iFloatField = CAknMfneFloat::NewL( aMaxFractionalDigits );
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    iFloatField->SetLimits( aMinimumValue, aMaximumValue );
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    _LIT( KSpace, " " );
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    iSeparatorField = CAknMfneSeparator::NewL( KSpace );
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   113
    
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    iUnitField = CAknMfneSeparator::NewL( KNullDesC );
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    // This is for the lifetime of the editor.    
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   117
    if ( AknLayoutUtils::LayoutMirrored() )
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        {
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        AddField( iUnitField );      // ownership transferred
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        AddField( iSeparatorField ); // ownership transferred
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        AddField( iFloatField );     // ownership transferred
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        }
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    else
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        {   
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        AddField( iFloatField );     // ownership transferred
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   126
        AddField( iSeparatorField ); // ownership transferred
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        AddField( iUnitField );      // ownership transferred
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        }
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    SetValue( aInitialValue );
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    SetUnitL( aUnit );
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   132
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    SetFlags( aFlags );
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    }
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   135
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   136
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EXPORT_C void CAknUnitEditor::ConstructFromResourceL( TResourceReader& aResourceReader )
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    {
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    TReal minimumValue       = aResourceReader.ReadReal64();
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    TReal maximumValue       = aResourceReader.ReadReal64();
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    TReal initialValue       = aResourceReader.ReadReal64();
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    TInt maxFractionalDigits = aResourceReader.ReadInt8();
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    TInt unit                = aResourceReader.ReadInt32();
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    TUint flags              = aResourceReader.ReadInt32();
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   146
    ConstructL( minimumValue, maximumValue, initialValue, maxFractionalDigits, unit, flags );
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    }
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   149
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EXPORT_C TBool CAknUnitEditor::SetValue( TReal aValue )
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    {
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    TBool ret = iFloatField->SetValue( aValue );
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   153
    iUnitField->MakeVisible( UnitFieldVisibility() );
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    DrawDeferred();
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    if ( !IsFocused() )
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   156
        {
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   157
        TRAP_IGNORE( ReportEventL( MCoeControlObserver::EEventStateChanged ) );
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   158
        }
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    return ret;
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    }
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   161
    
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   162
    
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EXPORT_C TReal CAknUnitEditor::Value() const
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    {
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    return iFloatField->Value();
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   166
    }
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   167
    
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EXPORT_C TBool CAknUnitEditor::SupportsUnit( TInt aUnit ) const
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    {
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    return ( aUnit >= 0 && aUnit < iUnitLimit );
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   171
    }
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   172
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EXPORT_C void CAknUnitEditor::SetUnitL( const TDesC& aUnit )
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    {
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   175
    iUnitField->SetTextL( aUnit );
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   176
    iUnitType = EAknUnitEditorCustomUnit;
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    DrawDeferred();
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   178
    }
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   179
    
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EXPORT_C void CAknUnitEditor::SetUnitL( TInt aUnit )
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    {
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   183
    TInt resourceId( EAknUnitEditorCustomUnit );
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   184
        
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   185
    if ( !SupportsUnit( aUnit ) )
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   186
        {
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   187
        User::Leave( KErrNotSupported );
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   188
        }
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   189
        
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   190
    resourceId = KAknResourceTable[aUnit];
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   192
    if ( resourceId )
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   193
        {
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   194
        HBufC* unitString = StringLoader::LoadL( resourceId );
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   195
        CleanupStack::PushL( unitString );
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   196
        iUnitField->SetTextL( *unitString );
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   197
        CleanupStack::PopAndDestroy( unitString ); 
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   198
        }
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   199
    else
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   200
        {
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   201
        iUnitField->SetTextL( KNullDesC );
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   202
        }
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   203
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   204
    // Either a leave has occurred or this is a safe match
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   205
    iUnitType = aUnit;
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   206
    
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   207
    DrawDeferred();
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   208
    }
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   209
    
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   210
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EXPORT_C TInt CAknUnitEditor::GetUnit( TDes& aDes ) const
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    {
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   213
    return CopyDescOrNull( aDes, iUnitField->Text() );
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   214
    }
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   215
    
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   216
    
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EXPORT_C TInt CAknUnitEditor::Unit() const
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    {
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    return iUnitType;
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   220
    }
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   221
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   222
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EXPORT_C void CAknUnitEditor::SetMaxFractionalDigits(
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   224
    TInt aMaxFractionalDigits )
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   225
    {
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   226
    TBool validValue = ( aMaxFractionalDigits >= 0 &&
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         aMaxFractionalDigits <= KAknMaxAllowedFractionalDigits );
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    if ( validValue )
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        {
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        iFloatField->SetMaxFractionalDigits( aMaxFractionalDigits );
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        DrawDeferred();
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        }
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    }
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EXPORT_C TInt CAknUnitEditor::MaxFractionalDigits() const
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    {
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    return iFloatField->MaxFractionalDigits();
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    }
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EXPORT_C void CAknUnitEditor::SetMinimumAndMaximum( TReal aMinimumValue, TReal aMaximumValue )
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    {
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    iFloatField->SetLimits( aMinimumValue, aMaximumValue );
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    DrawDeferred();
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    }
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EXPORT_C void CAknUnitEditor::GetMinimumAndMaximum( TReal& aMinimumValue, TReal& aMaximumValue ) const
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    {
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    iFloatField->GetLimits( aMinimumValue, aMaximumValue );
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    }
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EXPORT_C void CAknUnitEditor::SetFlags( TUint aFlags )
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    {
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    iFlags = aFlags;
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    if ( iFlags & EAknUnitEditorAllowUninitialized )
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        {
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        iFloatField->SetFlags( CAknMfneFloat::EAllowNaN );
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        }
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    DrawDeferred();
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    }
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EXPORT_C TUint CAknUnitEditor::Flags() const
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    {
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    return iFlags;
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    }
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EXPORT_C void CAknUnitEditor::PrepareForFocusLossL()
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    {
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    CEikMfne::PrepareForFocusLossL();
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    }
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void CAknUnitEditor::FocusChanged( TDrawNow aDrawNow )
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    {
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    // Due to a quirk in dialog page captioned control creation
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    // this function could get called even if the editor is
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    // not fully constructed.
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    if ( iUnitField )
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        {
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        iUnitField->MakeVisible( UnitFieldVisibility() );    
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        }
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    CEikMfne::FocusChanged( aDrawNow );
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    }
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TBool CAknUnitEditor::UnitFieldVisibility() const
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    {
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    return ( !Math::IsNaN( Value() ) || IsFocused() );
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    }
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// End of file