/*+
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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:    Handles & propogates UI state change notifications.+
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*+
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*/+
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+
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+
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+
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/**+
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 * @internal reviewed 24/08/2007 by D Holland+
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 */+
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+
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#ifndef __GLXTV_H__+
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#define __GLXTV_H__+
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+
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// External Includes+
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#include <e32def.h>+
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#include <e32base.h>+
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+
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// Internal Includes+
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#include <glxtvconstants.h>+
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+
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// Forward Declarations+
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class MGlxTvObserver;+
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class CGlxWindowVisibilityMonitor;+
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class CGlxTvConnectionMonitor;+
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class CRepository;+
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+
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// For window server visibility notifications +
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class MGlxWindowVisibilityObserver+
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    {+
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public:+
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    /**+
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     * Handle changes to the application window visiblity+
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     * Called when window visible state changes+
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     * @param aChangeType The visibility change type+
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     */+
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    virtual void HandleWindowVisibilityChangedL( TTvChangeType aChangeType ) = 0;+
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    };+
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        +
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        +
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        +
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// For Tv connection notification+
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class MGlxTvConnectionObserver+
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    {+
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public:+
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    /**+
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     * Handle TV/HDMI/Headset connection state changes+
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     * @param aChangeType The connection change type+
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     */+
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    virtual void HandleTvConnectionStatusChangedL(TTvChangeType aChangeType) = 0;+
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    };+
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        +
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        +
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        +
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        +
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/**+
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 * Class Description+
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 * A class that handles and propagates UI change notifications+
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 * @author Loughlin+
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 */        +
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NONSHARABLE_CLASS (CGlxTv) : public CBase,+
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                             public MGlxWindowVisibilityObserver,+
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                             public MGlxTvConnectionObserver+
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    {+
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public:+
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    /**+
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     * Static Symbian 2 stage constructor.+
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     * @param a TvObserver+
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     */+
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    IMPORT_C static CGlxTv* NewL( MGlxTvObserver& aTvObserver );+
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    +
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    /**+
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     * Destructor.+
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     */+
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    IMPORT_C ~CGlxTv();+
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    +
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private:+
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+
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    /**+
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     * Standard C++ constructor+
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     * @param a TvObserver     +
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     */+
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    CGlxTv(MGlxTvObserver& aTvObserver);+
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    +
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    /*+
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     * Symbian second stage construction+
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     */+
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    void ConstructL(); +
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   +
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public: // class public method   +
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   +
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    /**+
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     * Get the current screen size+
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     * @return the Screen size in pixels+
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     */+
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    IMPORT_C TSize ScreenSizeL() const;+
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   +
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    /**+
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     * Is the Analog TV Connected+
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     * @return ETrue if active, otherwise EFalse+
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     */+
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    IMPORT_C TBool IsConnected() const; +
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    +
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    /**+
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     * Is the TV widescreen+
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     * @return ETrue if widescreen, otherwise EFalse+
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     */+
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    IMPORT_C TBool IsWidescreen() const; +
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    +
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    /**+
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     * Is the HDMI TV Connected+
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     * @return ETrue if active, otherwise EFalse+
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     */+
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    IMPORT_C TBool IsHDMIConnected() const;+
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    +
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public: // from MGlxWindowVisibilityObserver+
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    /**+
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     * @ref MGlxWindowVisibilityObserver::HandleWindowVisibilityChangedL+
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     */+
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    void HandleWindowVisibilityChangedL( TTvChangeType aChangeType );+
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    +
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                                +
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public: // from MGlxTvConnectionObserver+
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    /**+
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     * @ref MGlxTvConnectionObserver::HandleTvConnectionStatusChangedL+
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     */+
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    void HandleTvConnectionStatusChangedL(TTvChangeType aChangeType);+
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    +
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private: // new private methods+
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    /**+
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     * Retrive the TV Display Aspect Ratio and TV Setting+
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     * Calculate the screen size from aspect ratio and TV type+
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     */    +
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    void CalcTvScreenSzL();+
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+
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    /**+
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     * Start monitoring the environment for changes to the TV aspect ratio+
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     * and the Gallery window groups visiblity +
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     */        +
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    void MonitorEnvironmentL();+
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+
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    /**+
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     * Stop monitoring the environment for changes to the TV aspect ratio+
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     * and the Gallery window groups visiblity +
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     */      +
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    void StopMonitoringEnvironment();+
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    +
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private: // class member data    +
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    // Not Owned: The TV out observer +
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    MGlxTvObserver& iTvObserver;+
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+
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    // Owned: The Window visibility monitor+
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    CGlxWindowVisibilityMonitor* iWindowVisibilityMonitor;+
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+
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    // Owned: The TV connection monitor+
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    CGlxTvConnectionMonitor* iTvConnectionMonitor;+
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 +
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    // Size of the TV Out display size+
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    TSize iSzInPixels;+
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    +
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    // Owned: The central repository where TV display ratio is held.+
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    CRepository* iCenRep;+
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    +
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     // The implementation of the class, hidden from clients+
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	class CGlxTvOutCenRepMonitor;+
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	+
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	// Owned: Monitoring class for Tv Ratio Values+
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	CGlxTvOutCenRepMonitor* iTvDisplayAspectRatioMonitor; +
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	+
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	// The TV aspect ratio+
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	TInt iAspectRatio;+
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    };+
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    +
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    +
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#endif // __GLXTV_H__+
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