author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Thu, 07 Jan 2010 12:46:23 +0200 | |
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parent 0 | 4e91876724a2 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2008-2009 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: Scrollbar |
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* |
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*/ |
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#ifndef C_GLXSCROLLBAR_H |
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#define C_GLXSCROLLBAR_H |
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#include <e32base.h> |
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class MGlxScrollbarObserver; |
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class CAlfControl; |
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class CAlfLayout; |
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class CAlfAnchorLayout; |
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class CGlxTextureManager; |
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/** |
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* CGlxScrollbar |
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* |
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* Class to handle controlling/drawing of scrollbar |
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* |
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* Example: Scrollbar required for list with 10 items, with 3 visible items |
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* The first visible row is at position 0. |
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* The position is always from 0 to (full length - 1). |
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* |
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* Client calls: |
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* |
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* SetFullLength(10) |
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* SetVisibleLength(3) |
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* SetPosition(0) |
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* |
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* @lib glxuiutilities.lib |
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* |
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* @author Michael Yip |
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*/ |
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class CGlxScrollbar : public CBase |
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{ |
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public: |
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/** |
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* Two phase constructor |
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* |
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* @param aControl The Alf control |
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* @param aParentLayout The Alf layout that owns this scrollbar |
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*/ |
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IMPORT_C static CGlxScrollbar* NewL(CAlfControl& aControl, CAlfLayout& aParentLayout); |
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|
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/** |
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* Two phase constructor |
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* |
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* @param aControl The Alf control |
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* @param aParentLayout The Alf layout that owns this scrollbar |
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*/ |
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IMPORT_C static CGlxScrollbar* NewLC(CAlfControl& aControl, CAlfLayout& aParentLayout); |
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|
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/** |
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* Add an observer to observe scrollbar |
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* Observers are notified if the scrollbar is scrollable |
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* |
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* @param aObserver The observer |
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*/ |
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IMPORT_C void AddObserverL(MGlxScrollbarObserver* aObserver); |
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|
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/** |
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* Remove an observer |
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* |
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* @param aObserver The observer |
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*/ |
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IMPORT_C void RemoveObserver(MGlxScrollbarObserver* aObserver); |
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|
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/** |
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* Sets the visible length of the scrollbar |
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* |
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* @param aVisibleLength The visible length |
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*/ |
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IMPORT_C void SetVisibleLength(TUint aVisibleLength); |
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/** |
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* Sets the full length of the scrollbar |
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* |
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* @param aFullLength The full length |
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* @param aTransitionTime The transition time in milliseconds if any animation is required |
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*/ |
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IMPORT_C void SetFullLength(TUint aFullLength, TUint aTransitionTime = 0); |
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/** |
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* Sets the position of the first visible row in the full length |
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* |
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* @param aPosition The position |
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* @param aTransitionTime The transition time in milliseconds if any animation is required |
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*/ |
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IMPORT_C void SetPosition(TUint aPosition, TUint aTransitionTime = 0); |
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/** |
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* Destructor |
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*/ |
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~CGlxScrollbar(); |
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private: |
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/** |
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* Constructor |
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*/ |
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CGlxScrollbar(); |
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/** |
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* Two phase constructor |
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* |
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* @param aControl The Alf control |
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* @param aParentLayout The Alf layout that owns this scrollbar |
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*/ |
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void ConstructL(CAlfControl& aControl, CAlfLayout& aParentLayout); |
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/** |
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* Set the textures for the visuals |
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*/ |
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void SetTexturesL(); |
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/** |
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* Set the textures for the visuals in the background layout |
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* |
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* @param aTextureManager The texture manager for creating textures |
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*/ |
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void SetBackgroundTexturesL(CGlxTextureManager& aTextureManager); |
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/** |
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* Set the textures for the visuals in the thumb layout |
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* |
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* @param aTextureManager The texture manager for creating textures |
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*/ |
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void SetThumbTexturesL(CGlxTextureManager& aTextureManager); |
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/** |
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* Set the background or thumb layout anchors |
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* |
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* @param aLayout The anchor layout to set the anchors for |
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*/ |
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void SetAnchors(CAlfAnchorLayout& aLayout); |
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/** |
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* Update the scrollbar |
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* |
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* @param aTransitionTime The transition time in milliseconds if any animation is required |
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*/ |
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void Update(TUint aTransitionTime = 0); |
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/** |
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* Notify observers if the scrollbar is scrollable |
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*/ |
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void NotifyObservers(); |
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private: |
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/// The Alf layout for the scrollbar |
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/// Ownership passed to parent layout |
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CAlfLayout* iLayout; |
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/// The visible length of the scrollbar |
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TUint iVisibleLength; |
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/// The full length of the scrollbar |
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TUint iFullLength; |
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/// The position of the first visible row in the full length |
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TUint iPosition; |
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/// Observers of the scrollbar |
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RPointerArray<MGlxScrollbarObserver> iObservers; |
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}; |
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#endif // C_GLXSCROLLBAR_H |