emailuis/uicomponents/src/tuicscrollbarmodel.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Wed, 31 Mar 2010 21:08:33 +0300
branchRCL_3
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permissions -rw-r--r--
Revision: 201011 Kit: 201013
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/*
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* Copyright (c) 2007-2008 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: tuicscrollbarmodel.cpp
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*
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*/
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#include "tuicscrollbarmodel.h"
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#include "emailtrace.h"
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#include <aknlayoutscalable_avkon.cdl.h>
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#include <AknUtils.h>
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// ---------------------------------------------------------------------------
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// TUiCScrollBarModel::TUiCScrollbarModel
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// ---------------------------------------------------------------------------
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//
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TUiCScrollBarModel::TUiCScrollBarModel()
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    : iHeight( 0 ), iWindowHeight( 0 ), iWindowPosition( 0 )
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    {
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    FUNC_LOG;
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    }
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// ---------------------------------------------------------------------------
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// TUiCScrollBarModel::SetHeight
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// ---------------------------------------------------------------------------
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//
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void TUiCScrollBarModel::SetHeight( TInt aHeight )
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    {
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    FUNC_LOG;
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    iHeight = aHeight;
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    }
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// ---------------------------------------------------------------------------
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// TUiCScrollBarModel::Height
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// ---------------------------------------------------------------------------
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//
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TInt TUiCScrollBarModel::Height() const
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    {
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    FUNC_LOG;
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    return iHeight;
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    }
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// ---------------------------------------------------------------------------
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// TUiCScrollBarModel::SetWindowHeight
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// ---------------------------------------------------------------------------
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//
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void TUiCScrollBarModel::SetWindowHeight( TInt aHeight )
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    {
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    FUNC_LOG;
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    iWindowHeight = aHeight;
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    }
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// ---------------------------------------------------------------------------
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// TUiCScrollBarModel::WindowHeight
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// ---------------------------------------------------------------------------
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//
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TInt TUiCScrollBarModel::WindowHeight() const
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    {
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    FUNC_LOG;
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    return iWindowHeight;
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    }
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// ---------------------------------------------------------------------------
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// TUiCScrollBarModel::SetWindowPosition
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// ---------------------------------------------------------------------------
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//
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void TUiCScrollBarModel::SetWindowPosition( TInt aPosition )
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    {
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    FUNC_LOG;
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    iWindowPosition = aPosition;
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    }
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// ---------------------------------------------------------------------------
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// TUiCScrollBarModel::WindowPosition
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// ---------------------------------------------------------------------------
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//
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TInt TUiCScrollBarModel::WindowPosition() const
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    {
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    FUNC_LOG;
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    return iWindowPosition;
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    }
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// ---------------------------------------------------------------------------
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// TUiCScrollBarModel::ThumbHeight
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// ---------------------------------------------------------------------------
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//
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TInt TUiCScrollBarModel::ThumbHeight() const
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    {
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    FUNC_LOG;
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    TInt thumbHeight( 0 );
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    if ( iHeight > 0 )
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        {
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        thumbHeight = Min( 
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                Max( CalculatedThumbHeight(), MinimumThumbHeight() ), 
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                    iWindowHeight );
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        }
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    return thumbHeight;
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    }
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// ---------------------------------------------------------------------------
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// TUiCScrollBarModel::ThumbPosition
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// ---------------------------------------------------------------------------
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//
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TInt TUiCScrollBarModel::ThumbPosition() const
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    {
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    FUNC_LOG;    
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    TInt thumbPosition( 0 );
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    if ( iHeight > 0 )
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        {
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        thumbPosition = iWindowHeight * iWindowPosition / iHeight;
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        if ( iWindowHeight > 0 )
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            {
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            thumbPosition -= (ThumbHeight() - CalculatedThumbHeight()) 
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                    * thumbPosition / iWindowHeight;
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            }
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        }    
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    return thumbPosition;
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    } 
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// ---------------------------------------------------------------------------
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// TUiCScrollBarModel::ScrollBarNeeded
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// ---------------------------------------------------------------------------
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//
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TBool TUiCScrollBarModel::ScrollBarNeeded() const
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    {
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    FUNC_LOG;
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    return iWindowHeight < iHeight;
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    }
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// ---------------------------------------------------------------------------
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// TUiCScrollBarModel::MinimumThumbHeight
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// ---------------------------------------------------------------------------
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//
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TInt TUiCScrollBarModel::MinimumThumbHeight() const
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    {
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    FUNC_LOG;
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    TAknLayoutRect layoutRect;
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    TAknWindowComponentLayout layout = AknLayoutScalable_Avkon::aid_size_min_handle();
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    layoutRect.LayoutRect( TRect(), layout.LayoutLine() );
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    return layoutRect.Rect().Height();
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    }
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// ---------------------------------------------------------------------------
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// TUiCScrollBarModel::CalculatedThumbHeight
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// ---------------------------------------------------------------------------
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//
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TInt TUiCScrollBarModel::CalculatedThumbHeight() const
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    {
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    FUNC_LOG;
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    TInt thumbHeight( 0 );
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    if ( iHeight > 0 )
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        {
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        thumbHeight = iWindowHeight * iWindowHeight / iHeight;
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        }
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    return thumbHeight;
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    }
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// end of file