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) 2006-2007 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: Definition of CHuiImageVisual. CHuiImageVisual is a visual |
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* that is able to display images. |
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* |
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*/ |
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#ifndef __HUIIMAGEVISUAL_H__ |
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#define __HUIIMAGEVISUAL_H__ |
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#include <e32base.h> |
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#include <gdi.h> |
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#include <uiacceltk/HuiVisual.h> |
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#include <uiacceltk/HuiImage.h> |
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#include <uiacceltk/HuiGc.h> |
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/* Forward declarations */ |
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class CHuiEnv; |
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class CHuiControl; |
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struct THuiMetric; |
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struct THuiXYMetric; |
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/** |
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* Image visual displays an image. |
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* |
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* @see THuiImage |
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* @see CHuiTexture |
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*/ |
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NONSHARABLE_CLASS(CHuiImageVisual) : public CHuiVisual |
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{ |
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/** @beginAPI */ |
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public: |
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/** Image scaling modes. */ |
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enum TScaleMode |
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{ |
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/** Image is not scaled. It will be drawn at a 1:1 mapping between its texture and the screen pixels.*/ |
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EScaleNormal, |
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/** Image is uniformly scaled to fit the width of the visual's area. The aspect |
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ratio of the image is preserved. */ |
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EScaleFitWidth, |
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/** Image is uniformly scaled to fit the height of the visual's area. The aspect |
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ratio of the image is preserved. */ |
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EScaleFitHeight, |
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/** Image is uniformly scaled to fit the visual's area so that the entire area |
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is covered. The aspect ratio of the image is preserved. */ |
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EScaleCover, |
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/** Image is uniformly scaled to fit the visual's area. The aspect ratio of the |
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image is not preserved. This is the default scale mode. It allows |
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full control of the appearance of the image by adjusting the |
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visual's size. */ |
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EScaleFit, |
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/** Image is uniformly scaled to fit inside the visual's area. The aspect ratio |
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of the image is preserved. */ |
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EScaleFitInside |
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}; |
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/** Color modes. */ |
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enum TColorMode |
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{ |
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/** Default color mode. */ |
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EColorModulate, |
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/** A dimmed color mode will apply fogging to this visual. */ |
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EColorDimmed |
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}; |
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public: |
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/* Constructors and destructor. */ |
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/** |
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* Constructs and appends a new image visual to the owner control. |
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* |
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* @param aOwnerControl Control that will own the new visual. |
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* |
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* @return The new visual. |
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*/ |
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IMPORT_C static CHuiImageVisual* AddNewL(CHuiControl& aOwnerControl, |
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CHuiLayout* aParentLayout = 0); |
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/** @endAPI */ |
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/** |
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* Constructor. |
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* |
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* @param aOwner Owner of the new visual. |
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*/ |
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CHuiImageVisual(MHuiVisualOwner& aOwner); |
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/** |
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* Second-phase constructor. |
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*/ |
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void ConstructL(); |
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|
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/** |
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* Destructor. |
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*/ |
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virtual ~CHuiImageVisual(); |
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/** @beginAPI */ |
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/* Methods. */ |
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|
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/** |
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* Sets the scaling mode for the bitmap. |
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* An unscaled image will be drawn at a 1:1 mapping between its |
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* texture and the screen. A scaled image will be resized to fit the |
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* visual's size exactly. |
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* If unset, the default is EScaleFit. |
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* |
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* @param aScaleMode The scaling mode of this image visual. |
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*/ |
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IMPORT_C void SetScaleMode(TScaleMode aScaleMode); |
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|
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/** |
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* Sets the image displayed by the image visual. If no image |
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* has been set for the visual, the visual does not draw anything. |
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* |
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* @note You may call SetImage also with images(/textures) that have not |
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* been loaded (yet). The toolkit has been designed so that SetImage() |
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* can be called before the texture has been finished loading. In the |
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* meantime, a placeholder could be used. In other words, the CHuiTexture |
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* that the THuiImage refers to does need to exist but it doesn't have to |
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* be loaded yet. |
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* |
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* @note Redrawing of the visual happens automatically after SetImage() has |
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* been called. |
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* @note Redrawing also happens automatically when a texture has been fully |
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* loaded by the texture manager. The manager notifies the environment, |
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* which issues a full display redraw. |
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* |
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* @param aImage Primary image to be visualized. |
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* @see SetSecondaryImage() |
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*/ |
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IMPORT_C void SetImage(const THuiImage& aImage); |
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|
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/** |
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* Sets the secondary image displayed by the image visual. |
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* |
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* The reason there are two images is to make crossfading simpler from |
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* the application's point of view. The blending ratio between the images |
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* is controlled with the timed value iSecondaryAlpha of CHuiImageVisual. |
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* |
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* If iSecondaryAlpha is zero (the default), the secondary image will not be |
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* drawn. When iSecondaryAlpha increases, the secondary image becomes |
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* gradually visible as its opacity increases. |
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* |
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* When crossfading is not needed, SetSecondaryImage() and iSecondaryAlpha |
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* can be ignored. |
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* |
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* @see SetImage() |
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* @see iSecondaryAlpha |
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*/ |
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IMPORT_C void SetSecondaryImage(const THuiImage& aImage); |
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|
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/** |
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* Returns the image of the visual. |
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*/ |
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IMPORT_C const THuiImage& Image() const; |
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|
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inline const THuiImage& SecondaryImage() const |
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{ |
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return iSecondaryImage; |
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} |
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|
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/** |
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* Sets the color of the image. Defaults to white. |
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*/ |
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IMPORT_C void SetColor(const TRgb& aColor); |
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|
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/** |
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* Sets the color mode of the image. Defaults to modulate. |
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* |
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* @param aColorMode Color mode. |
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* @param aParam Parameter for the mode. With blend, specifies the |
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* amount of color to blend (0...1). 1.0 will cause |
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* the image to be fully blended to the visual's color. |
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*/ |
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IMPORT_C void SetColorMode(TColorMode aColorMode, TReal32 aParam = 0.0) __SOFTFP; |
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|
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/** |
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* Sets the stretch widths of the image. Set both to zero to disable stretching. |
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* A stretched image will be scaled over the whole width or height of the visual, |
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* except for a band specified by the parameters, which will not be scaled (1:1 pixel mapping). |
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* For doing uniform scaling of an image, use the SetScaleMode API instead. |
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* |
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* @deprecated Deprecated as an unneeded and broken functionality. |
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* |
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* @param aTop Top width in pixels. |
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* @param aBottom Bottom width in pixels. |
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* @see SetStretchMode. |
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* @see CHuiGc::DrawStretchImage |
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*/ |
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IMPORT_C void SetStretch(TInt aTop, TInt aBottom); |
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/** |
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* Sets the stretch mode of the image. |
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* |
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* @see CHuiGc::DrawStretchImage. |
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* @see Setstretch. |
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* @param aStretchMode Horizontal or vertical. |
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*/ |
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IMPORT_C void SetStretchMode(CHuiGc::TStretchMode aStretchMode); |
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/** |
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* @deprecated Use CHuiDropShadow |
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* |
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* Sets the drop shadow distance. |
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* |
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* @deprecated Use metric unit version instead |
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* |
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* @param aShadowDistance Pixels. |
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*/ |
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IMPORT_C void SetDropShadow(TInt aShadowDistance); |
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/** |
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* @deprecated Use CHuiDropShadow |
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* |
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* Sets the drop shadow distance. |
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* |
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* @param aShadowDistance Shadow distance in metric units. Both X and Y will get same value. |
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*/ |
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IMPORT_C void SetDropShadow(const THuiMetric& aShadowDistance); |
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/** |
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* @deprecated Use CHuiDropShadow |
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* |
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* Sets the drop shadow distance. |
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* |
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* @param aShadowDistance Shadow distance in metric units. |
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*/ |
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IMPORT_C void SetDropShadow(const THuiXYMetric& aShadowDistance); |
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/** @endAPI */ |
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/** |
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* Draw the visual. |
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*/ |
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void DrawSelf(CHuiGc& aGc, const TRect& aDisplayRect) const; |
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TBool Changed() const; |
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void ClearChanged(); |
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void GetClassName(TDes& aName) const |
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{ |
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aName = _L("CHuiImageVisual"); |
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} |
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void ExpandRectWithContent(TRect& aRect) const; |
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TBool PrepareDrawL(); |
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private: |
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/* Private methods */ |
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private: |
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/** Image displayed by the visual. By default scaled to fit the visual. */ |
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THuiImage iImage; |
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/** Secondary image displayed by the visual. */ |
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THuiImage iSecondaryImage; |
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/** Scalingmode of the visual. */ |
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TScaleMode iScaleMode; |
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/** Width of the top stretch. */ |
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TInt iTopStretch; |
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/** Width of the bottom stretch. */ |
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TInt iBottomStretch; |
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/** Stretch mode. */ |
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CHuiGc::TStretchMode iStretchMode; |
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/** @todo Use THuiTimedRgb. */ |
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TRgb iColor; |
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/** Color mode, e.g., modulate or blend. */ |
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TColorMode iColorMode; |
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/** Color parameter. When blend mode, specifies amount of blending applied. */ |
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TReal32 iColorParam; |
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// @deprecated Use CHuiDropShadow |
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TInt iDropShadowDeprecated; |
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public: |
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/* Public properties. */ |
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/** Angle for turning the image around its center point. */ |
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THuiTimedValue iTurnAngle; |
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/** Uniform scale factor for the image. */ |
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THuiTimedValue iScale; |
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/** Relative offset for scaled images. */ |
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THuiTimedPoint iOffset; |
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/** Alpha for the secondary image. If one, the primary image is not |
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visible at all. */ |
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THuiTimedValue iSecondaryAlpha; |
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private: |
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// @deprecated Use CHuiDropShadow |
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THuiXYMetric iDropShadow; |
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}; |
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#endif // __HUIIMAGEVISUAL_H__ |