author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 02 Feb 2010 07:56:43 +0200 | |
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permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 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: Text visual |
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* |
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*/ |
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#ifndef C_ALFTEXTVISUAL_H |
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#define C_ALFTEXTVISUAL_H |
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class TAknsItemID; |
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class TRgb; |
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#include <alf/alfvisual.h> |
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#include <alf/alftextstylemanager.h> |
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#include <alf/alfgc.h> |
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#include <AknFontSpecification.h> |
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#include <AknFontIdOffsets.hrh> |
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/** Background type suggestions. |
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* |
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* These enums suggest which sort of background is under the visual, |
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* in order for it to be rendered in an appropriate colour. |
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* A dark background means that the text will be rendered in white, and a |
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* light background means that the text will be black.*/ |
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enum TAlfBackgroundType |
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{ |
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/** background beneath the font is light. */ |
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EAlfBackgroundTypeLight, |
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|
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/** background beneath the font is dark. */ |
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EAlfBackgroundTypeDark |
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}; |
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/** |
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* Text visual for text drawing. |
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* Text visual shows one or more lines of text. |
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* |
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* @code |
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* CAlfTextVisual* textVisual = CAlfTextVisual::AddNewL( control ); |
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* textVisual->SetTextL( _L( "Hello" ) ); * |
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* @endcode |
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* |
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* @lib alfclient.lib |
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* @since S60 v3.2 |
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*/ |
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class CAlfTextVisual : public CAlfVisual |
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{ |
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public: |
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/* Types. */ |
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enum TLineWrap |
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{ |
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/** Lines must be broken manually with line break characters. |
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If the visual does not use clipping, long text lines will |
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go outside the visual. */ |
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ELineWrapManual, |
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/** Lines that do not fit in the visual's content area are truncated |
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with an ellipsis (...). */ |
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ELineWrapTruncate, |
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/** Lines are broken to the visual's content area. */ |
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ELineWrapBreak |
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}; |
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enum TLineSpacingUnits |
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{ |
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/** Line spacing is given in pixels */ |
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EPixels, |
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|
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/** Line spacing is given in twips */ |
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ETwips |
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}; |
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/** |
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* Constructor, which gives ownership to the control. |
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* |
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* @param aOwnerControl The control |
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* @param aParentLayout If given, the parent layout. |
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* @return New instance. Ownership NOT transreffed (owned by control) |
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*/ |
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IMPORT_C static CAlfTextVisual* AddNewL(CAlfControl& aOwnerControl, |
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CAlfLayout* aParentLayout = 0); |
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/** |
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* Constructor. |
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*/ |
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IMPORT_C CAlfTextVisual(); |
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/** |
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* Second-phase constructor. |
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*/ |
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IMPORT_C void ConstructL(CAlfControl& aOwner); |
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|
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/** |
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* Destructor. |
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*/ |
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IMPORT_C virtual ~CAlfTextVisual(); |
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|
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/** |
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* Set the text shown in the visual. The text may contain formatting |
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* codes to change the size, color, and alignment of the text. |
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* |
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* @param aText Descriptor containing the text. |
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*/ |
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IMPORT_C void SetTextL(const TDesC& aText); |
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/** |
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* Returns the text of the visual. |
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* |
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* @return The text. |
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*/ |
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IMPORT_C const TDesC& Text() const; |
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|
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/** |
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* Sets the default text style of the text visual. This style describbes the size |
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* and colour of the rendered text. Parameters passed here can be overridden by |
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* call to SetFontSpec(). |
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* @see SetFontSpec() |
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* |
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* @param aStyle Text style. |
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* @param aBackgroundType Text background type. Affects the color of |
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* the text. Defaults to EAlfBackgroundTypeLight |
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* (ie, black text will be used). |
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*/ |
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IMPORT_C void SetStyle( |
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TAlfPreconfiguredTextStyle aStyle, |
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TAlfBackgroundType aBackgroundType = EAlfBackgroundTypeLight); |
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|
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|
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/** |
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* Sets the default text style of the text visual. This style describes the style |
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* the text is rendered with. The text style has to be created with the text style |
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* manager. If the given text style does not exist, the text style is reverted back |
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* to default text style. |
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* @see CAlfTextStyleManager |
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* |
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* @param aTextStyleId Text style ID provided by the text style manager. |
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*/ |
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IMPORT_C void SetTextStyle(TInt aTextStyleId); |
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|
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/** |
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* Sets the alignment of the text visual. |
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* |
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* @param aAlignHorizontal Horizontal alignment. |
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* @param aAlignVertical Vertical alignment. |
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*/ |
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IMPORT_C void SetAlign(TAlfAlignHorizontal aAlignHorizontal, |
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TAlfAlignVertical aAlignVertical); |
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|
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/** |
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* Sets the line spacing for multiline text visual when the text wraps around. |
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* |
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* @param aLineSpacing Line spacing between lines in multiline text visual. |
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* @parem aUnits Defines the units of the line spacing. |
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* @see TLineSpacingUnits. |
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*/ |
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IMPORT_C void SetLineSpacing(TInt aLineSpacing, TLineSpacingUnits aUnits = EPixels); |
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|
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/** |
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* Determines the size of the text in the visual. |
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* Text must have been updated / or drawn to be able |
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* to use these extents. |
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* |
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* @return Size of the text in pixels, or TSize(0,0) if |
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* text is undefined or the mesh hasn't been updated. |
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* |
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* @see UpdateMeshL() |
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*/ |
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IMPORT_C TSize TextExtents() const; |
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|
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/** |
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* Determines the size of the text in the visual. |
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* Text must have been updated / or drawn to be able |
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* to use these extents. |
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* |
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* @return Size of the text in pixels, or TSize(0,0) if |
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* text is undefined or the mesh hasn't been updated. |
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* |
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* @see UpdateMeshL() |
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*/ |
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IMPORT_C TRect SubstringExtents(TUint aStart, TUint aEnd) const; |
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|
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/** |
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* Accesses the text style of the text visual. |
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* |
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* @deprecated |
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* |
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* @return the text style, but only valid if the text style corresponds to a preconfigured |
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* text style |
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*/ |
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IMPORT_C TAlfPreconfiguredTextStyle Style(); |
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|
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/** |
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* Accesses the text style id of the text visual. |
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* |
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* @note This API should be used in preference to @c Style |
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* |
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* @return the text style id, this can be used to access the actual text style, |
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* see @c CAlfTextStyleManager::TextStyle |
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*/ |
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IMPORT_C TInt TextStyle() const; |
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/** |
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* Sets the maximum number of lines displayed by the text visual. |
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* The default is KMaxTInt. |
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*/ |
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IMPORT_C void SetMaxLineCount(TInt aMaxLineCount); |
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/** |
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* Determines the maximum number of line displayed by the text visual. |
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*/ |
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IMPORT_C TInt MaxLineCount() const; |
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/** |
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* Determines the visual's line wrapping mode. |
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* |
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* @return Line wrapping mode. |
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*/ |
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IMPORT_C TLineWrap Wrapping() const; |
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/** |
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* Sets the line wrapping mode. |
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* |
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* @param aWrap Line wrapping mode. |
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*/ |
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IMPORT_C void SetWrapping(TLineWrap aWrap); |
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/** |
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* Determines the background type of the text visual. This was set with a |
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* call to SetStyle(). |
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*/ |
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IMPORT_C TAlfBackgroundType BackgroundType(); |
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/** |
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* @deprecated Use CAlfDropShadow |
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* |
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* Returns shadow opacity. |
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* |
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* @return Shadow opacity |
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*/ |
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IMPORT_C TAlfTimedValue ShadowOpacity(); |
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/** |
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* @deprecated Use CAlfDropShadow |
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* |
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* Sets shadow opacity. |
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* Changes the opacity of the text soft shadow. |
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* Currently SetShadowStrength is only implemented in the OpenGL renderer, |
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* and will have no effect in BitGDI. |
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* |
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* @param aShadowOpacity Shadow opacity |
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* @see EnableShadow |
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*/ |
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IMPORT_C void SetShadowOpacity(const TAlfTimedValue& aShadowOpacity); |
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/** |
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* Sets the color of the text. |
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* |
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* @param aColor Text color. |
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*/ |
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IMPORT_C void SetColor(TRgb aColor); |
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/** |
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* Sets the color of the text via skin id. |
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* |
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* @param aID Skin-id of the color group to use |
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* @param aIndex Index within the color group |
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*/ |
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IMPORT_C void SetColor(const TAknsItemID& aId,const TInt aIndex); |
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/** |
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* Sets the color of the text via skin id. |
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* |
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* @param aTextColorTable Skin-id name of the color group to use |
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* @param aColorIndex Index within the color group |
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*/ |
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IMPORT_C void SetColor(const TDesC& aTextColorTable,const TDesC& aColorIndex); |
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/** |
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* @deprecated Use CAlfDropShadow |
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* |
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* Enables or disables the text shadow. |
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* The rasterized text shadow is a special implementation |
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* of shadow that looks good with text. If this value is |
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* false, then the text will not have a rasterized shadow. |
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* |
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* @param aDoEnable True enables rasterized shadows, false disables. |
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* @see SetShadowOpacity |
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* @see ShadowOpacity |
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*/ |
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IMPORT_C void EnableShadow(TBool aDoEnable); |
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/** |
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* Sets offset for the text. |
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* |
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* @param aOffset text offset. |
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*/ |
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IMPORT_C void SetOffset(const TAlfTimedPoint& aOffset); |
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/** |
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* Gets offset for the text. |
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* |
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* @return text offset. |
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*/ |
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IMPORT_C TAlfTimedPoint Offset() const; |
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/** |
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* From CAlfVisual |
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* @see CAlfVisual |
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*/ |
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IMPORT_C void RemoveAndDestroyAllD(); |
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IMPORT_C void UpdateChildrenLayout(TInt aTransitionTime = 0); |
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IMPORT_C CAlfVisual* FindTag(const TDesC8& aTag); |
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|
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/** |
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* Sets highlighting for a part of Text |
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* Start and end index of text to be highlighted, are ordinal indices. |
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* In case of multiple language, bidirectional text (e.g. English + Arabic), |
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* mixed text selection for highlight, might give strange results. |
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* e.g.TextVisual text : "E n g l i s h c i b a r A" ( Arabic script is |
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* read/written from right to left. Assume 'c i b a r A' is Arabic script ) |
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* and highlight range : 5-9. |
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* Expected result : "i s h" and "r A" should get highlighted |
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* Actual Result: "i s h c i" |
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* Hence, it is recommended to use different text visuals in case of selection of |
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* bidirectional text. |
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* |
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* @param aStart Startng index of Highlighted text. |
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* @param aEnd Ending index of Highlighted text. |
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* @param aHighlightColor Background color of highlighted text. |
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* @param aHightlightColor Font color of Highlighted text. |
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*/ |
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IMPORT_C void SetHighlightRange(TInt aStart, TInt aEnd, TRgb& aHighlightColor, TRgb& aHighlightTextColor); |
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|
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/** Internal utils */ |
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void PrepareForUpdateMesh(); |
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void UpdateMesh(TBool aSynchronousUpdate = EFalse); |
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void ReleaseMesh(); |
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protected: |
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/** |
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* From CAlfVisual |
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* @see CAlfVisual |
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*/ |
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IMPORT_C void DoRemoveAndDestroyAllD(); |
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IMPORT_C void PropertyOwnerExtension(const TUid& aExtensionUid, TAny** aExtensionParams); |
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private: |
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struct TTextVisualPrivateData; |
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TTextVisualPrivateData* iTextVisualData; |
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}; |
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#endif // C_ALFTEXTVISUAL_H |