author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Mon, 03 May 2010 13:22:43 +0300 | |
changeset 19 | f5bac0badc7e |
parent 0 | 15bf7259bb7c |
permissions | -rw-r--r-- |
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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: Defines CHuiSkin abstract base class for skins. Skins are a |
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* collection resources forming custom graphical appearance. |
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* |
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*/ |
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#ifndef __HUISKIN_H__ |
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#define __HUISKIN_H__ |
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#include <e32base.h> |
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#include <gdi.h> |
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#include <uiacceltk/HuiTexture.h> |
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#include <uiacceltk/huitextstylemanager.h> |
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/* Forward declarations. */ |
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class CHuiEnv; |
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class CHuiGc; |
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//class THuiFont; |
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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 THuiBackgroundType |
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{ |
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/** background beneath the font is light. */ |
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EHuiBackgroundTypeLight, |
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/** background beneath the font is dark. */ |
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EHuiBackgroundTypeDark |
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}; |
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/** Element of a skin. */ |
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enum THuiSkinElement |
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{ |
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/** Soft key labels. */ |
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EHuiSkinElementSoftKeys |
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}; |
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/** Location specifier for an element of the skin. */ |
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enum THuiSkinLocation |
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{ |
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/** Location is not determined. */ |
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EHuiSkinLocationNone, |
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/** Location is in the top. */ |
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EHuiSkinLocationTop, |
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/** Location is on the right. */ |
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EHuiSkinLocationRight, |
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/** Location is in the bottom. */ |
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EHuiSkinLocationBottom, |
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/** Location is on the left. */ |
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EHuiSkinLocationLeft |
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}; |
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/** |
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* Skin (texture) Resources. |
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*/ |
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enum THuiSkinTextureResource |
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{ |
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EHuiSkinBackgroundTexture, |
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EHuiSkinShadowTexture, |
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EHuiSkinGlyphShadowTexture, |
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EHuiSkinLineTexture |
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}; |
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/** |
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* Orientations. |
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*/ |
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enum THuiSkinOrientation |
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{ |
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EHuiSkinOrientationPortrait, |
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EHuiSkinOrientationLandscape |
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}; |
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/** |
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* Skin defines a collection of textures, fonts, and layout resources forming |
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* custom graphical appearance for a GUI that can be applied |
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* in order to suit the different tastes of different users. |
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* |
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* CHuiSkin is an abstract base class for all skin implementations. |
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* |
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* @todo It should be possible to define a skin for each display separately. |
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* The environment can still own the skins, but each display would |
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* know the skin it is using. This way off-screen displays can look |
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* different and use different DPI (e.g., different font sizes) |
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* than on-screen displays. |
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*/ |
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NONSHARABLE_CLASS(CHuiSkin) : public CBase, public MHuiTextureContentObserver |
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{ |
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public: |
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/* Constructors and destructor. */ |
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/** |
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* Constructor. |
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*/ |
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CHuiSkin(CHuiEnv& aEnv); |
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/** |
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* Second-phase constructor for skin implementations. Note that the |
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* texture manager is not available when this is called, which means |
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* textures and fonts cannot be loaded during the execution of this |
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* method. |
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*/ |
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virtual void ConstructL() = 0; |
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/** |
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* Destructor. |
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*/ |
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~CHuiSkin(); |
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/* Methods. */ |
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/** |
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* Returns the environment of the skin. |
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*/ |
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inline CHuiEnv& Env() |
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{ |
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return iEnv; |
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} |
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/** |
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* Determines the orientation of the skin. Controls may use this to adapt |
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* their content to a specific layout orientation. |
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* |
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* @return Orientation of the skin. |
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*/ |
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IMPORT_C virtual THuiSkinOrientation Orientation() const; |
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/** |
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* Determines the preferred location for an element of the skin. |
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* |
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* @param aElement Element whose location to determine. |
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* |
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* @return Location specifier. |
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*/ |
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IMPORT_C virtual THuiSkinLocation Location(THuiSkinElement aElement); |
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/** |
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* Called to notify the skin that there has been a change in the display |
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* size. This will make the skin do things like determine new font sizes. |
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* The application should call this manually from the AppUi class. |
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*/ |
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IMPORT_C virtual void NotifyDisplaySizeChangedL(); |
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/** |
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* Makes a graphics context current. |
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* |
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* @param aGc Graphics context. |
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*/ |
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IMPORT_C virtual void SetContext(CHuiGc& aGc); |
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/** |
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* Returns the current graphics context. |
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* |
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* @return Graphics context. |
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*/ |
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IMPORT_C virtual CHuiGc& Context() const; |
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/** |
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* Returns the text color to be used with a text style on a certain |
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* kind of background. |
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* |
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* @param aStyle Text style. |
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* @param aBackgroundType Type of background on which text is over. |
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*/ |
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virtual TRgb StyleTextColor(THuiPreconfiguredTextStyle aStyle, |
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THuiBackgroundType aBackgroundType) const = 0; |
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/** |
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* Returns a texture corresponding the requested skin texture resource. |
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* |
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* If the defined texture was not yet created the function will try to |
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* create it and leaves if creation fails. |
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* |
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* @param aSkinTextureResource Enum of the texture to be created. |
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* @see THuiSkinTextureResource. |
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* @see ReleaseTexture(). |
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* @return Reference to the skin-owned texture object. |
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* @leave KErrNotSupported if invalid skin texture resource enum is provided. |
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*/ |
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IMPORT_C virtual const CHuiTexture& TextureL(TInt aSkinTextureResource); |
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/** |
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* Explicit way for releasing textures from memory that are owned by this |
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* skin. TextureL recreates the released texture if called after this. |
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* This allows application developers to reduce amount of used texture memory on demand. |
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* |
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* @param aSkinTextureResource Enum of the texture to be released. |
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* @see THuiSkinTextureResource. |
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* @see TextureL(). |
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*/ |
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IMPORT_C virtual void ReleaseTexture(TInt aSkinTextureResource); |
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/** |
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* Returns a texture corresponding the requested skin texture resource. |
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* |
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* If the defined texture was not yet created the function will try to |
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* create it and returns an error value if creation fails. If texture |
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* cannot be created a blank texture is provided. Texture is passed |
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* in the output parameter. |
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* |
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* @param aSkinTextureResource Enum of the texture to be created. |
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* @see THuiSkinTextureResource. |
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* |
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* @param aOutTexture Output parameter: Reference to a texture pointer |
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* where the requested texture will be stored. If texture creation fails |
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* a blank texture reference is assigned to this pointer, thus there should |
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* never be a situation where texture pointer is NULL or invalid. |
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* |
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* @return Error code indicating whether the texture was acquired |
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* succesfully or not. KErrNone if everything went ok. KErrNoMemory if |
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* allocation of the texture failed. KErrNotSupported if invalid skin |
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* texture id is provided. |
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*/ |
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IMPORT_C virtual TInt GetTexture(TInt aSkinTextureResource, |
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const CHuiTexture*& aOutTexture); |
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/** |
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* Release cached textures. |
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*/ |
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void ReleaseCachedTextures(); |
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public: |
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/* Implementation of MHuiTextureContentObserver. */ |
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IMPORT_C void TextureContentUploaded(CHuiTexture& aTexture); |
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IMPORT_C void TextureContentReleased(CHuiTexture& aTexture); |
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IMPORT_C void RestoreTextureContentL(CHuiTexture& aTexture); |
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protected: |
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virtual void SkinExtension(const TUid& aExtensionUid, TAny** aExtensionParameters); |
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private: |
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/* Private methods. */ |
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/** |
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* Returns a texture corresponding the requested skin texture resource. |
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* |
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* If the defined texture was not yet created the function will try to |
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* create it and leaves if creation fails. |
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* |
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* @param aSkinTextureResource Enum of the texture to be created. |
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* @param aForcedPrepare Content of texture always recreated. |
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* |
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* |
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* @see THuiSkinTextureResource. |
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* @see ReleaseTexture(). |
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* @return Reference to the skin-owned texture object. |
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* @leave KErrNotSupported if invalid skin texture resource enum is provided. |
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*/ |
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const CHuiTexture& TextureL(TInt aSkinTextureId, TBool aForcedPrepare); |
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/** |
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* Prepares a shadow texture |
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*/ |
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void PrepareShadowTextureL(CHuiTexture& aTexture); |
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/** |
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* Prepares a glyph shadow texture |
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*/ |
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void PrepareGlyphShadowTextureL(CHuiTexture& aTexture); |
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/** |
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* Prepares a line texture |
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*/ |
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void PrepareLineTextureL(CHuiTexture& aTexture); |
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private: |
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/** Environment. */ |
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CHuiEnv& iEnv; |
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/** Current graphics context. */ |
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CHuiGc* iGc; |
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/** Texture used for drawing shadows. */ |
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CHuiTexture* iShadowTexture; |
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/** Texture used for soft lines. */ |
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CHuiTexture* iLineTexture; |
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/** Texture used for text glyph shadows (managed). */ |
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CHuiTexture* iGlyphShadowTexture; |
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}; |
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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diff
changeset
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321 |
#endif // __HUISKIN_H__ |