author | Pat Downey <patd@symbian.org> |
Fri, 04 Jun 2010 10:37:54 +0100 | |
changeset 32 | 8b9155204a54 |
parent 0 | 1fb32624e06b |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2006-2009 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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* |
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*/ |
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#ifndef __LINKEDFONTS_H__ |
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#define __LINKEDFONTS_H__ |
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_LIT(KFNTSTORELinkedFontsPanicCategory,"LINKED_FONTS"); |
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class CLinkedTypefaceBody; |
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class CLinkedTypefaceSpecificationBody; |
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class CLinkedTypefaceElementSpec; |
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class CLinkedTypefaceGroup; |
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class CFbsTypefaceStore; |
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class TLinkedTypefaceSpecificationArgs; |
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/** |
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This class contains the specification of a linked typeface. It is made up of groups and typefaces. |
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Groups (CLinkedTypefaceGroup) must contain one or more typeface; the attributes of the group control how the rasterizer |
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draws the typefaces within the group. |
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Typefaces (CLinkedTypefaceElementSpec) specify which individual typefaces make up the linked typeface. These are |
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referred to as "elements" of the linked typeface. |
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Once the linked typeface has been created users can use it as if it were any other typeface assuming there |
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is a rasteriser that supports this feature available. When selecting a character the rasterize searches |
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each typeface in turn from the lowest index to the highest. When drawing text, the first typeface to contain |
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the required character is used. |
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KMaxLinkedTypefaces and KMaxLinkedTypefaceGroups define the maximum number of typefaces and groups that can be |
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added to the specification. |
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This class is not thread safe. |
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WARNING: Class for internal and partner use ONLY. Compatibility is not guaranteed in future releases. |
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@publishedAll |
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@released |
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@see CLinkedTypefaceElementSpec |
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@see CLinkedTypefaceGroup |
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@see KLinkedMaxTypefaces |
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@see KMaxLinkedTypefaceGroups |
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*/ |
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NONSHARABLE_CLASS(CLinkedTypefaceSpecification) : public CBase |
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{ |
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public: |
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/** |
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This function constructs the linked typeface specification and places it on the CleanupStack. |
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The specification must contain at least one group and one typeface in order for registration to be successful. |
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@param aName The name of the linked typeface. This name should not be the same as an existing typeface. |
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@return A linked typeface specification object |
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*/ |
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IMPORT_C static CLinkedTypefaceSpecification* NewLC(const TDesC& aTypefaceName); |
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/** |
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The name of this linked typeface |
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@return The name of this linked typeface |
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*/ |
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IMPORT_C TPtrC Name() const; |
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/** |
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The number of typeface that have been added to this object |
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@return TInt The number of typeface that have been added to this object |
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*/ |
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IMPORT_C TInt TypefaceCount() const; |
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/** |
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Returns the linked typeface at the specified index. |
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The first typeface is at index 0, the last at TypefaceCount()-1. |
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@return The linked typeface. Null is returned on error. |
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@see CLinkedTypefaceSpecification::NumberOfTypefaces() |
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*/ |
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IMPORT_C CLinkedTypefaceElementSpec* Typeface(TInt aIndex) const; |
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/** |
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Function to return the index of the canonical (metrics) typeface. The typeface can be |
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retrieved by passing the index to Typeface(). |
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@return TInt The index to the canonical typeface |
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@return KErrNotFound No canonical typeface exists |
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@return KErrOverFlow There is more than one canonical typeface |
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@see CLinkedTypefaceSpecification::Typeface() |
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*/ |
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IMPORT_C TInt CanonicalIndex(); |
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/** |
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Adds the supplied CLinkedTypefaceElementSpec to the Linked Typeface specification. |
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The element is placed at the specified index. Adding a canonical element will only be successful |
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if one has not already been added. The specification takes ownership of the element specification |
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if adding is successful. |
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109 |
|
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@param aElementSpec The specification to be added. |
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@param aIndex The position at which the element spec will be added. |
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112 |
|
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@see CLinkedTypefaceSpecification::AddTypefaceAtBackL() |
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@see CLinkedTypefaceSpecification::RemoveTypeface() |
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@see KMaxLinkedTypefaces |
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116 |
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@leave KErrArgument If the element is canonical and a canonical element already exists or if the group ID doesn't exist |
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@leave KErrNoMemory There was not enough memory available to perform this operation |
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@leave KErrOverflow The typeface specification is full; adding would exceed KMaxLinkedTypefaces |
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120 |
*/ |
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IMPORT_C void AddTypefaceAtIndexL(CLinkedTypefaceElementSpec& aElementSpec, TInt aIndex); |
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122 |
|
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123 |
/** |
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Adds the supplied CLinkedTypefaceElementSpec to the Linked Typeface specification. |
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The element is placed at the back of the specification. Adding a canonical element will only be |
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successful if one has not already been added. The specification takes ownership of the element |
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specification if adding is successful. |
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128 |
|
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@param aElementSpec |
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130 |
|
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@see CLinkedTypefaceSpecification::AddTypefaceAtIndexL() |
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@see CLinkedTypefaceSpecification::RemoveTypeface() |
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@see KMaxLinkedTypefaces |
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134 |
|
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@leave KErrArgument If the element is canonical and a canonical element already exists or if the group ID doesn't exist |
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@leave KErrNoMemory There was not enough memory available to perform this operation |
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@leave KErrOverflow The typeface specification is full; adding would exceed KMaxLinkedTypefaces |
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138 |
*/ |
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IMPORT_C void AddTypefaceAtBackL(CLinkedTypefaceElementSpec& aElementSpec); |
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140 |
|
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141 |
/** |
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Removes the element spec at the specified index from this specification. |
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This function deletes the element spec. If the element is the only one within its group |
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the group is also removed and deleted from the specification. |
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145 |
|
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@param aIndex the index of the element spec to be removed |
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147 |
|
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@return TInt KErrNone if Removal was successful; KErrNotFound If the index is negative or larger than the number of typeface elements or the element doesn't exist |
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149 |
*/ |
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IMPORT_C TInt RemoveTypeface(TInt aIndex); |
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151 |
|
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/** |
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Creates the linked typeface so that it is available to use a normal typeface. |
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154 |
|
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@param aStore The Typeface Store the linked typeface should be registered with |
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156 |
|
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@panic EFbsPanicNoConnection There is no connection to the Font & Bitmap Server |
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158 |
|
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@leave KErrNotFound One or more of the typeface elements do not exist |
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@leave KErrOverflow The linked typeface contains too many or 0 elements |
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@leave KErrArgument The typeface has no or more than one canonical element |
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@leave KErrAlreadyExists A typeface with the same name already exists |
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@leave KErrNotSupported There is not a rasterizer available that supports linked typefaces |
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*/ |
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IMPORT_C void RegisterLinkedTypefaceL(CFbsTypefaceStore& aStore); |
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166 |
|
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/** |
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Retrieves the linked typeface specification from the server; the name of the typeface to |
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retrieve should be specified at construction. All typefaces and groups contained in the |
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specification are removed before retrieval of the new data. |
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171 |
|
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@see CLinkedTypefaceSpecification::NewLC() |
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173 |
|
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@param aStore A pointer to the FontStore |
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|
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@leave KErrNotSupported There is not a rasterizer available that supports linked typefaces |
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@leave KErrArgument The font specified does not exist or is not a linked typeface |
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*/ |
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IMPORT_C void FetchLinkedTypefaceSpecificationL(CFbsTypefaceStore& aStore); |
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|
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/** |
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Adds the group specified to this specification. |
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The specification takes ownership of the group if addition is successful. |
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@param aGroup The group to be added |
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|
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@see CLinkedTypefaceSpecification::RemoveLinkedTypefaceGroup() |
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|
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@leave KErrAlreadyExists A group with the same ID is already present in the specification |
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*/ |
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IMPORT_C void AddLinkedTypefaceGroupL(CLinkedTypefaceGroup& aGroup); |
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/** |
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This will remove the group and all the elements associated with it. |
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|
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@param aGroupId The Id of the group to be removed |
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*/ |
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IMPORT_C TInt RemoveLinkedTypefaceGroup(TInt aGroupId); |
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199 |
|
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/** |
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Returns the linked typeface group with the specified group ID. |
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|
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@param aGroupId The linked typeface group ID |
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@return The linked typeface group specified or NULL if it doesn't exist |
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*/ |
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IMPORT_C CLinkedTypefaceGroup* GroupById(TInt aGroupId) const; |
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/** |
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Returns the linked typeface group at the specified index within the specification. |
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The Index ranges from 0 to the value returned by NumberOfGroups()-1. |
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@param aGroupIndex The linked typeface groups index within the specification |
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@return The linked typeface group specified or NULL if it doesn't exist |
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*/ |
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IMPORT_C CLinkedTypefaceGroup* Group(TInt aGroupIndex) const; |
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/** |
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Returns the number of groups that this linked typeface specification contains. |
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@see CLinkedTypefaceSpecification::Group() |
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@return TInt Number of groups |
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*/ |
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IMPORT_C TInt GroupCount() const; |
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/** |
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Default destructor |
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*/ |
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IMPORT_C ~CLinkedTypefaceSpecification(); |
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/** |
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Removes and destroys all groups and elements from the specification. |
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WARNING: Function for internal use ONLY. Compatibility is not guaranteed in future releases. |
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*/ |
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IMPORT_C void Clear(); |
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/** |
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Update the specification of an existing linked typeface. |
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@param aStore A typeface store |
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@publishedPartner |
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*/ |
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IMPORT_C void UpdateLinkedTypefaceL(CFbsTypefaceStore& aStore); |
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private: |
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CLinkedTypefaceSpecification(); |
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void ConstructL(const TDesC& aTypefaceName); |
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void DoAddTypefaceL(CLinkedTypefaceElementSpec& aElementSpec, TInt aPos); |
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private: |
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CLinkedTypefaceSpecificationBody *iBody; |
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}; |
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/** |
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Class to specify an individual typeface within a linked typeface. |
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WARNING: Class for internal and partner use ONLY. Compatibility is not guaranteed in future releases. |
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@see CLinkedTypefaceSpecification |
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@see CLinkedTypefaceGroup |
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@publishedAll |
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@released |
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*/ |
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NONSHARABLE_CLASS(CLinkedTypefaceElementSpec) : public CBase |
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{ |
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public: |
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/** |
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Create a new linked typeface element specification. The name specified must be an existing typeface |
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that should be added to the linked typeface. The group ID links this typeface to a linked typeface |
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group. |
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@see CLinkedTypefaceGroup |
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@param aTypefaceName The typeface name for this element |
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@param aGroupId The ID of the linked font group this element should belong to |
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@return The newly created element spec |
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*/ |
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IMPORT_C static CLinkedTypefaceElementSpec* NewLC(const TDesC& aTypefaceName, TInt aGroupId); |
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/** |
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Returns the typeface that this element represents within the linked typeface. |
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@return The element typeface name |
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*/ |
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IMPORT_C TPtrC ElementName() const; |
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/** |
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Set whether the element is the canonical (metrics) font. |
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This is the font that provides all the metrics for the linked typeface. |
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@param aIsCanonical ETrue if the element is canonical, EFalse otherwise |
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*/ |
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IMPORT_C void SetCanonical(TBool aIsCanonical); |
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/** |
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@return ETrue if the lement is canonical, EFalse otherwise |
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*/ |
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IMPORT_C TBool Canonical() const; |
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/** |
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@return The group ID specified at construction. |
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*/ |
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IMPORT_C TInt GroupId() const; |
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/** |
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Default Destructor |
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*/ |
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IMPORT_C ~CLinkedTypefaceElementSpec(); |
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private: |
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/** |
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Constructor |
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*/ |
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CLinkedTypefaceElementSpec(TInt aGroupId); |
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void ConstructL(const TDesC& aName); |
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|
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private: |
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HBufC* iElementName; |
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TBool iIsCanonical; |
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TInt iGroupId; |
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}; |
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|
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/** |
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This class contains parameters used to describe the groups that linked typeface elements are associated to. |
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These "metrics" apply to all fonts that are specified to be within the group. |
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330 |
|
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WARNING: Class for internal and partner use ONLY. Compatibility is not guaranteed in future releases. |
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332 |
|
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@publishedAll |
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@released |
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*/ |
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NONSHARABLE_CLASS(CLinkedTypefaceGroup) : public CBase |
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{ |
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public: |
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/** |
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Specifies the different ways in which a typeface belonging to this group can be scaled. |
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*/ |
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enum TScalingOption |
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{ |
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EScalingNone, |
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EScalingUp, |
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EScalingDown, |
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EScalingUpOrDown, |
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}; |
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349 |
/** |
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Specifies whether the font baseline of fonts belonging to this group should be shifted or not. |
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*/ |
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enum TBaselineShift |
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{ |
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EBaselineShift, |
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ENoBaselineShift, |
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}; |
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357 |
/** |
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Constructs a new linked typeface group with the specified ID and places it on the CleanupStack. |
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359 |
|
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By default the Antialiasing Threshold, Boldness Percentage and Italic Angle are set to -1. |
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The rasterizer will apply its "best-guess" as to the value in this case. |
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The default scaling option is EScalingNone; the default baseline shift is ENoBaselineShift. |
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|
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@param TInt The group ID of this group |
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@return CLinkedTypefaceGroup* A newly constructed group |
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*/ |
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IMPORT_C static CLinkedTypefaceGroup* NewLC(TInt aGroupId); |
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|
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/** |
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The group ID specified at construction. |
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|
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@return TInt The group ID of this group |
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*/ |
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IMPORT_C TInt GroupId() const; |
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|
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/** |
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Sets the scaling option associated with the typefaces within this group. |
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|
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@param TScalingOption The enumeration value corresponding to the required scaling. |
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|
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@see CLinkedTypefaceGroup::TScalingOption |
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*/ |
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IMPORT_C void SetScalingOption(TScalingOption aOption); |
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384 |
|
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385 |
/** |
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The scaling option associated with the typefaces within this group. |
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|
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@see CLinkedTypefaceGroup::TScalingOption |
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389 |
|
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@return TScalingOption Scaling options |
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*/ |
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IMPORT_C TScalingOption ScalingOption() const; |
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|
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/** |
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Sets whether the baseline of typefaces within this group is shifted. |
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396 |
|
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@param TBaselineShift The enumeration value corresponding to the required shifting. |
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398 |
|
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@see CLinkedTypefaceGroup::TBaselineShift |
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*/ |
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IMPORT_C void SetBaselineShift(TBaselineShift aShift); |
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402 |
|
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403 |
/** |
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404 |
The baseline shift associated with the typefaces within this group. |
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405 |
|
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@return TBaselineShift The baseline shift |
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407 |
*/ |
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IMPORT_C TBaselineShift BaselineShift() const; |
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409 |
|
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410 |
/** |
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Sets the boldness percentage used by typefaces belonging to this group. |
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412 |
|
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The percentage is relative to the font size specified. For example if a |
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font with an em height of 18 has a boldness percentage of 5% the resulting |
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emboldened text will be emboldened by 18 x (5 / 100) = 0.9 pixels. |
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416 |
|
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@param aPercentage The boldness percentage to be used by this group. |
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*/ |
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IMPORT_C void SetBoldnessPercentage(TInt aPercentage); |
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420 |
/** |
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Returns the current boldness percentage for this typeface group. |
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@return The current boldness percentage for this typeface group |
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*/ |
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IMPORT_C TInt BoldnessPercentage() const; |
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|
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/** |
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Sets the angle (slant) of italic text |
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|
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@param aAngle The angle (slant) of italic text |
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*/ |
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IMPORT_C void SetItalicAngle(TInt aAngle); |
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|
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/** |
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The angle (slant) of italic text |
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|
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@return The angle (slant) of italic text |
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*/ |
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IMPORT_C TInt ItalicAngle() const; |
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|
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/** |
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Default constructor |
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*/ |
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~CLinkedTypefaceGroup(); |
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|
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private: |
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CLinkedTypefaceGroup(TInt aGroupId); |
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|
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private: |
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TInt iGroupId; |
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TScalingOption iScalingOption; |
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TBaselineShift iBaselineShift; |
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TInt iBoldnessPercentage; |
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TInt iItalicAngle; |
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}; |
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#endif |