mulwidgets/mulsliderwidget/inc/mulsliderwidget.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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/*
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* Copyright (c) 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:  Widget interface with utilities for slider widget.
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*
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*/
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#ifndef ALF_SCROLLBARWIDGET_H
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#define ALF_SCROLLBARWIDGET_H
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// ToolKit Includes
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#include <alf/alfanchorlayout.h>
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// WidgetModel Includes
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#include <alf/ialfwidgeteventhandler.h>
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#include "alf/alfwidget.h"
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#include <alf/alfexceptions.h>
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// Widget Includes
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#include <mul/imulsliderwidget.h>
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#include <mul/imulslidermodel.h>
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// Forward Declarations
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// From Alfred Client
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class CAlfEnv;
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class CAlfDisplay;
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class CAlfControl;
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// From namespace Alf
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namespace Alf
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    {
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// Forward Declarations
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class IAlfVariantType;
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class IAlfElement;
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class IAlfWidgetEventHandler;
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class INode;
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class IAlfWidgetFactoryBase;
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class CAlfWidgetControl;
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class IAlfModel;
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class AlfElement;
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class AlfVisualTemplate;
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//class AlfScrollBarWidgetAttributeOwner;
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    }
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//From name space duiuimodel
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namespace duiuimodel
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    {
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class DuiNode;
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    }
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namespace Alf
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    {
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    class IMulSliderBaseElementInternal;
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    /**
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     * A basic slider widget implementation.
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     * Contains methods for creating the default
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     * building blocks for the slider widget.
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     */
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class MulSliderWidget : public IMulSliderWidget
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    {
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public:
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    /**
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     * Creator Method.
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     * 
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     * @param aEnv The environment for the widget.
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     * @param aContainer The container widget where this widget is contained.
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     * @param aWidgetId The name of the widget. Not Owned.
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     * @param aFilePath Path to XML file describing the presentation 
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     *                  of the widget. Not Owned.
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     * @param aCustomData Custom data. Not Owned.
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     * @param aNode Node. Not Owned.
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     * @return MulSliderWidget , or NULL if it does not create 
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     */
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    static MulSliderWidget* create(CAlfEnv& aEnv, 
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                                    IAlfContainerWidget& aContainer, 
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                                    const char* aWidgetId, 
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                                    AlfCustomInitDataBase* aCustomData=NULL);
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    /**
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     * Virtual Destructor.
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     */ 
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    virtual ~MulSliderWidget();
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    // From IAlfInterfaceBase
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    /**
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     * Getter for interfaces provided by the slider widget class.
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     *
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     * @since S60 ?S60_version
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     * @param aType A descriptor to identify the type of the queried interface.
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     * @return The queried interface, or NULL if the interface is not
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     *         supported or available.
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     */
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    IAlfInterfaceBase* makeInterface(const IfId& aType);
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    // From IAlfWidget
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    /**
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     * Return the control
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     */
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    CAlfWidgetControl* control() const;
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    /**
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     * getter for the parent container. The ownership is not passed.
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     * @param none
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     * @return the parent container or NULL if the widget is the root-widget.
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     */
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    virtual IAlfContainerWidget* parent() const;
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    /**
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     * Setter for the control. The control is owned by the Alfred environment.
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     *
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     * @since S60 ?S60_version
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     * @param aControl The control for this widget.
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     * @param aDeletePreviousControl delete previous control.TRUE by default.
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     * @return void.
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     */
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    void setControl(CAlfWidgetControl* aControl, 
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                                    bool aDeletePreviousControl = true);
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		/**
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		API returns the Slider Model of the widget.
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    */                                    
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    IMulSliderModel& SliderModel() ;
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    /**
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     * Gets the model.
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     */
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    IAlfModel* model();
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    /** 
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     * Sets the model.
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     * @return void.
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     */
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    void setModel(IAlfModel* aModel, bool /*param*/);
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    /** 
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     * Return the widget name
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     */
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    const char* widgetName() const;
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    /**
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     * sets the focus to the child.
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     * @return void.
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     */
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    void setChildFocus(bool /*aFocus*/);
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    /** 
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     * Sets the presentation for the widget using presentation XML file.
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     * Destroys any existing presentation.
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     * @param aFilePath Path to XML file describing the presentation 
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     *                  of the widget. Not Owned.
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     * @exception AlfWidgetException if no visualization node available 
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     *                               in Presentation XML or if no control
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     *                               is associated with the widget.
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     * @exception bad_alloc 
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     * @since S60 ?S60_version
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     * @return void.
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     */
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    virtual void setPresentation(const char* aFilePath);
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	/**
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	 * Set the transparency for the background of the slider widget.
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	 *
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	 * @param True,  to set background as transparent
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	 * @param False, to set background as opaque	
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	 */
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	void MakeTransparent( bool aTransparent ) ;
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	/**
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	 * Enable/Disable key handling .
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	 *
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	 * @param aVal: True,  to handle keyevents by Application
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	 * 		 	  False, to handle keyevents as defined in the control	
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	 */
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	void SetHandleKeyEvent( bool aVal ) ;
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	/**
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	 * API to show the widget
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	 * @param aShow - Shows the widget on value True. 
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	 * @param aTransitionTime - Transition time for widget to be shown.
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	 */
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	void ShowWidget(bool aShow, int aTransitionTime =0);
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	/**
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	 * API returns true if the widget is hidden
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	 */
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	bool IsHidden();
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	/**
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	 * API returns the container layout. 
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	 */
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	const CAlfLayout& ContainerLayout(); 
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		/**
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	 * Update template .
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	 *
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	 * @param aTemplateId: template id
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	 * 		 	 
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	 */
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	void changeTemplate(int aTemplateId);
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	/**
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	 * Adds event Handling for the Widget.
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	 *
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	 * @param aObserver: Observer of widget.
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	 * 		 	 
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	 */
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	void AddEventHandler( IAlfWidgetEventHandler& aObserver) ;
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	/**
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	 * Remove an observer to widget
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	 *
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	 * @param aObserver Observer of widget.
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	 */
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	 void RemoveEventHandler( IAlfWidgetEventHandler& aObserver); 
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	 /**
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	 * Returns opcaity of the widget.
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	 * 		 	 
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	 */
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	 bool GetOpacity(); 
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	 /**
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	 * Returns true if Key handling is enabled by widget.
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	 * 		 	 
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	 */
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	 bool IsKeyEnabled(); 
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	 /** 
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    	* returns the Slider element 
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    	*/
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    IMulSliderBaseElementInternal* GetSliderElement();
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protected:
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    /**
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     * C++ constructor.
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     * 
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     * @param aEnv The environment for the widget.
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     * @param aContainer The container widget where this widget is contained.
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     * @param aWidgetId The name of the widget. Not Owned.
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     * @param aFilePath Path to XML file describing the presentation 
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     *                  of the widget. Not Owned.
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     * @param aCustomData Custom data.
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     * @param aNode Node. Not Owned.
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     */
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    MulSliderWidget(CAlfEnv& aEnv, 
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                        IAlfContainerWidget& aContainer, 
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                        const char* aWidgetId, 
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                        AlfCustomInitDataBase* aCustomData=NULL);
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    /**
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     * Methods to create different default elements and control of scroll bar.
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     *
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     * @param aEnv The environment for the widget.
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     * @param aDisplay The display for the widget.
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     * @return void.
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     */
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    void constructDefault(CAlfEnv& aEnv, 
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                            AlfCustomInitDataBase* aCustomData=NULL);
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    /**
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     * Constructs widget from declaration.
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     *
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     * @param aEnv The environment for the widget.
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     * @param aNode declaration node.
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     * @return void.
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     */
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    void constructComponentsFromNode(CAlfEnv& aEnv, 
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                                    DuiNode& aNode);
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    /**
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     * Constructs widget from declaration. Recursive.
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     *
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     * @param aNode declaration node.
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     */
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    void processTreeRecursively( DuiNode& aNode );
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    /** 
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     * Creates the the widget using presentation XML file.
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     * Other widget parts are default.
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     * @param aEnv Alf Client Environment     
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     * @param aFilePath Path to XML file describing the presentation 
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     *                  of the widget. Not Owned.
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     * @exception AlfWidgetException if no visualization node available 
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     *                               in Presentation XML
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     * @exception bad_alloc      
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     * @since S60 ?S60_version
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     * @return void.
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     */
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    void constructFromPresentationXML(CAlfEnv& aEnv, const char *aFilePath);
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    /**
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     * Creates the default control.
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     *
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     * @param aEnv The environment for the widget.
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     * @return The Control.
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     */
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    CAlfWidgetControl *constructDefaultControl(CAlfEnv& aEnv);
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private :
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		/**
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			* Creates a Slider elment.
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			* @param - aElementId 
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			*/
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    void CreateSliderElement(const char* aElementId);
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private:
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    /**
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     * Base widget. Own.
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     */
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    auto_ptr<AlfWidget> mWidget;
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    /*
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     * IAlfAttributeOwner implementation. Own.
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     */
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    //auto_ptr<AlfScrollBarWidgetAttributeOwner> mAttributeOwner;
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	IMulSliderBaseElementInternal* mElement;
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    IMulSliderModel * mSliderModel; 
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    CAlfWidgetControl * mSliderControl;
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    bool mOpacity;
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    bool mHandleKeyEvent;
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    }; // class MulSliderWidget
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    } // namespace Alf
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#endif // C_ALFSCROLLBARWIDGET_H