photosgallery/slideshow/view/src/shwslideshowvolumecontrol.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 17 Dec 2009 08:45:44 +0200
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/*
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* Copyright (c) 2007-2008 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:    Slideshow view volume control.
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*
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*/
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#ifndef C_SHWSLIDESHOWVOLUMECONTROL_H
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#define C_SHWSLIDESHOWVOLUMECONTROL_H
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// INCLUDES
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#include <alf/alfcontrol.h>
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// FORWARD DECLARATION
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class CAlfImageVisual;
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class CAlfTextVisual;
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class CFbsBitmap;
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class CGlxUiUtility;
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class CAlfAnchorLayout;
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class CAlfBorderBrush;
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class CAlfLineVisual;
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class CAlfCurvePathLayout;
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class CShwSlideshowVolumeControl;
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class CAlfImageBrush;
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class CAlfGridLayout;
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class CAlfDeckLayout;
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class CAlfAnchorLayout;
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// CLASS DECLARATION
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/**
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 *  Volume control declaration.
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 * @internal reviewed 07/06/2007 by Kimmo Hoikka
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 */
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// ---------------------------------------------------------------------------
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// CShwSlideshowVolumeControl declaration
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// --------------------------------------------------------------------------- 
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NONSHARABLE_CLASS( CShwSlideshowVolumeControl ) : public CAlfControl
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    {
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public:
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    /**
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     * Two-phased constructor.
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     *
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     * @return Pointer to newly created object.
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     */
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     static CShwSlideshowVolumeControl* NewL(
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        CAlfEnv& aEnv,
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        CGlxUiUtility& aUtility,
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        TTimeIntervalMicroSeconds32 aInterval = 0);
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    /**
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     * Destructor.
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     */
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    virtual ~CShwSlideshowVolumeControl();
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    /**
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     * Called when the volume is changed.
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     * @param aVolume  The new volume.
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     * @param aMaxVolume  The maximum volume.
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     */
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    void SetVolume(TInt aVolume, TInt aMaxVolume);
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    /**
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     * Notifies the control that its visible has been changed on a display.
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     * This is the earliest time when the control knows the dimensions of
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     * the display it is being shown on.
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     *
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     * @param aIsVisible  ETrue, if the control is now visible on the
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     *			display.   EFalse, if the control is about to the hidden 
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     *			on the display.
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     * @param aDisplay    The display on which the control's visibility 
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     * 			is changing.
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     * @see CHuiControl
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     */	
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    void NotifyControlVisibility(TBool aIsVisible, CAlfDisplay& aDisplay);
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    /**
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     * Called when the control should be redrawn,
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     * e.g. after a change in volume.
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     */
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    void RefreshL();
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    /**
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     * Called when the control should be hidden,
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     * e.g. after a change in volume.
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     */
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    void Hide();
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    /**
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     * Called when the control should be shown.
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     * e.g. Key press and tap event
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     */
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    TBool ShowControlL();
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    /**
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     * Method timer calls after time out.
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     */
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    TInt TimerCallback();
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private:
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    /**
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     * C++ default constructor.
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     */
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    CShwSlideshowVolumeControl( CAlfEnv& aEnv,
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                                CGlxUiUtility& aUtility,
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                                TTimeIntervalMicroSeconds32 aInterval);
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    /**
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     * By default Symbian 2nd phase constructor is private.
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     */
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    void ConstructL( );
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    /**
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     * Helper function to retrieve and position the control's visuals
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     */
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    void SetAndLayoutVisualsL();
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    /**
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     * Helper function to convert the current volume to a percentage
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     */	
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    TInt CurrentVolumeAsPercentage();
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    /**
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     * Helper function to setup the visuals when volume is muted
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     */	
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    void SetMuteVisualVisibility();
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    /**
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     * Helper function to setup the visuals when volume is
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     * neither muted nor maximum
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     */	
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    void SetValueVisualVisibilityL(TInt aVolume);
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    /**
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     * Helper function to setup the visuals when volume is maximum
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     */	
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    void CreateFullVolumeVisualsL(TInt aVolume);
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    /**
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     * Helper function to remove the visuals from the layout
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     */	
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    void RemoveLayoutVisuals();
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    /**
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     * Helper function to remove the visuals from the layout
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     */	
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    void RemoveControlVisuals();
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private:
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    CGlxUiUtility& iUtility; // not owned
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    /** main parent layout*/
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    CAlfAnchorLayout* iMainVisual;
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    /* deck layout holds the backgroung visual, mute visual and the value grid */
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    CAlfDeckLayout* iVisualDeck;
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    /**holds the speaker icon and the percentage text*/
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    CAlfGridLayout* iValueGridVisual;
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    CAlfImageBrush* iBrush; // owned
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    // The visual elements of the control
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    CAlfImageVisual* iBackgroundImageVisual; // owned
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    CAlfImageVisual* iMuteImageVisual;		// owned
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    CAlfImageVisual* iSpeakerImageVisual;   // owned
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    CAlfTextVisual* iPercentTextVisual;   	// owned
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    TInt iVolume;		// owned
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    TInt iMaxVolume;	//owned
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    CPeriodic*	iTimer;	// owned
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    TTimeIntervalMicroSeconds32 iInterval; // owned
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    TSize iControlSize; // owned
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    CAlfEnv& iAlfEnv; //not owned
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    };
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#endif  // C_SHWSLIDESHOWVOLUMECONTROL_H
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// End of File