phoneuis/BubbleManager/Inc/BMCallObjectUtils.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Mon, 18 Jan 2010 20:18:27 +0200
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/*
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* Copyright (c) 2002-2006 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:  Utility methods for call object handling.
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*
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*/
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#ifndef BUBBLECALLOBJECTTUTILS_H
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#define BUBBLECALLOBJECTTUTILS_H
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//  INCLUDES
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#include <gdi.h>
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#include "BMBubbleManager.h"
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#include <avkon.hrh>
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// CONSTANTS
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// DATA TYPES
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// FORWARD DECLARATIONS
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class CBubbleCallObjectImage;
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class CBubbleImageReader;
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// CLASS DECLARATION
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/**
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*  Utility methods for call object handling.
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*
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*  @lib BubbleManager
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*  @since Series 60 3.1
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*/
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class BubbleCallObjectUtils
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    {
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    public:
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        // Tiling mode
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        enum TTileMode
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            {
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            ETileTopLeft,    // Tiling begin from top left corner
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            ETileTopRight,   // Tiling begin from top right corner
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            ETileCenterLeft, // Tiling begin from left, vertically centered
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            ETileCenterRight // Tiling begin from right, vertically centered   
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            };
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        // Scale mode. Aspect ratio is always preserved.
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        enum TScaleMode
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            {
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            EFillTarget,
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            EMaximumFit    
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            };
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    public: // New functions
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        ///////////////////////////////////////////////////////////////////////
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        //
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        // Construction and manipulation of CFbsBitmap objects.
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        //
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        ///////////////////////////////////////////////////////////////////////
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        /**
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        * Creates a new bitmap from the given bitmap by scaling it to the
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        * given size. Proportions of the source bitmap are maintained so
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        * cropping may be applied. If the given bitmap is very small it
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        * is duplicated, not scaled, to fill the created bitmap.
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        * @param aBitmap Source bitmap
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        * @param aTargetSize Size of bitmap to be created.
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        * @param aDisplayMode Display mode for bitmap created.
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        * @param aTileMode Tiling mode.
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        * @return New bitmap instance.
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        */
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        static CFbsBitmap* CreateBitmapL( 
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            const CFbsBitmap* aBitmap, 
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            const TSize& aTargetSize,
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            TDisplayMode aDisplayMode,
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            TTileMode aTileMode = ETileTopLeft );
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        /**
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        * Creates a new bitmap by cropping given bitmap to given size.
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        * @param aBitmap Bitmap to be cropped.
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        * @param aTargetSize Target size.
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        * @param aDisplayMode Display mode for bitmap created.
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        * @return New bitmap instance.
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        */
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        static CFbsBitmap* CreateCroppedBitmapL( 
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            const CFbsBitmap* aBitmap, 
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            const TSize& aTargetSize,
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            TDisplayMode aDisplayMode );
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        /**
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        * Creates a new bitmap by tiling given bitmap to given size.
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        * @param aBitmap Bitmap to be tiled.
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        * @param aTargetSize Target size.
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        * @param aDisplayMode Display mode for bitmap created.
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        * @param aTileMode Tiling mode.
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        * @return New bitmap instance.
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        */            
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        static CFbsBitmap* CreateTiledBitmapL( 
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            const CFbsBitmap* aBitmap, 
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            const TSize& aTargetSize,
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            TDisplayMode aDisplayMode,
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            TTileMode aTileMode );
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        /**
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        * Creates a new bitmap and renders given text given on it.
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        * Text is rendered according to call2_cli_visual_text_pane
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        * layout. Creates also mask bitmap. 
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        * @param aText Text to be rendered.
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        * @param aMainPaneRect Main pane rectangle.
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        * @param aSize Size for created bitmap.
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        * @param aTextColor Text color.
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        * @param aAlpha Transparency of text: 0-255.
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        * @param aDisplayMode Display mode for bitmap created.
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        * @param aBitmap Created bitmap on return.
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        * @param aMask Created mask on return.
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        */            
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        static void CreateImageBitmapsFromTextLC( 
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            const TDesC& aText, 
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            const TRect& aMainPaneRect,
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            const TSize& aSize,
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            const TRgb&  aTextColor,
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            TUint aAlpha,
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            TDisplayMode aDisplayMode,
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            CFbsBitmap*& aBitmap,
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            CFbsBitmap*& aMask );            
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        /**
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        * Calculates scaling factor for source size to fill target size. 
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        * @param aSourceSize Source size.
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        * @param aTargetSize Target size.
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        * @param aScaleMode Scaling mode.
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        * @return Scaling factor.
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        */    
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        static TReal ScalingFactor( 
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            const TSize& aSourceSize,
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            const TSize& aTargetSize,
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            TScaleMode aScaleMode );
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        /**
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        * Calculates scale factor and clipping rectangle based on
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        * source and target size. Clip rect is relative to source.
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        * @param aSourceSize Source size.
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        * @param aTargetSize Target size.
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        * @param aScaleMode Scaling mode.
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        * @param aScaleFactor Target size.
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        * @param aClipRect Target size.
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        * @return ETrue if source is tiny image i.e. not possible
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        *         to scale it to fill target. 
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        */    
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        static TBool GetScaleFactorAndClipRect( 
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            const TSize& aSourceSize,
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            const TSize& aTargetSize,
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            TScaleMode aScaleMode,
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            TReal& aScaleFactor,
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            TRect& aClipRect );
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    };
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#endif // BUBBLECALLOBJECTTUTILS_H   
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// End of File