/*

* Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). 

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:    Slideshow command handler

*

*/

#ifndef C_GLXCOMMANDHANDLERSLIDESHOW_H

#define C_GLXCOMMANDHANDLERSLIDESHOW_H

#include <e32base.h>

#include <shwconstants.h>	// for playback direction

#include <glxmedialistcommandhandler.h> 

#include <mglxmedialistobserver.h> // for media list observer

// Forward Declarations

class CGlxDefaultAttributeContext;

class MGlxMediaListProvider;

class TGlxMedia;

class CGlxUiUtility;

/**

 * @class CGlxCommandHandlerSlideshow

 *

 * Command handler that either launches slideshow with the selected items

 * from a media list or launches the slideshow settings.

 * @internal reviewed 07/06/2007 by Kimmo Hoikka

 */

NONSHARABLE_CLASS (CGlxCommandHandlerSlideshow) :

            public CGlxMediaListCommandHandler,

            public MGlxMediaListObserver

	{

public:

	/**

	 * Two-phase constructor

	 * @param aMediaListProvider object that provides the media list

	 * @param aStepBack EFalse if the command handler should not change

	 *	 the path's level. E.g. this may depend on whether the view's media 

	 *   list contains media items or if it is a "list of lists"

	 * @param aHasToolbarItem Whether Command Should be toolbar item (ETrue - if toolbar item)

	 * @param aFileName resource file

	 */

	IMPORT_C static CGlxCommandHandlerSlideshow* NewL(

			MGlxMediaListProvider* aMediaListProvider, TBool aStepBack,

			TBool aHasToolbarItem, const TDesC& aFileName);

	/** Destructor */

	IMPORT_C ~CGlxCommandHandlerSlideshow();

protected:

	/** @ref CGlxMediaListCommandHandler::ActivateL */

    void DoActivateL(TInt aViewId);

	/** @ref CGlxMediaListCommandHandler::DoExecuteL */

    TBool DoExecuteL(TInt aCommandId, MGlxMediaList& aList);

    /// @ref CGlxMediaListCommandHandler::DoIsDisabled

    TBool DoIsDisabled(TInt aCommandId, MGlxMediaList& aList) const;

    /// @ref CGlxMediaListCommandHandler::BypassFiltersForExecute

    TBool BypassFiltersForExecute() const;

    /// @ref CGlxCommandHandler::PopulateToolbar

    void PopulateToolbarL();

private:    // From MGlxMediaListObserver

    void HandleItemAddedL(TInt aStartIndex, TInt aEndIndex,

                MGlxMediaList* aList);

    void HandleMediaL(TInt aListIndex, MGlxMediaList* aList);

    void HandleItemRemovedL(TInt aStartIndex, TInt aEndIndex,

                MGlxMediaList* aList);

    void HandleItemModifiedL(const RArray<TInt>& aItemIndexes,

                MGlxMediaList* aList);

    void HandleAttributesAvailableL(TInt aItemIndex,

                const RArray<TMPXAttribute>& aAttributes, MGlxMediaList* aList);	

    void HandleFocusChangedL(NGlxListDefs::TFocusChangeType aType, TInt aNewIndex,

                TInt aOldIndex, MGlxMediaList* aList);

    void HandleItemSelectedL(TInt aIndex, TBool aSelected, MGlxMediaList* aList);

    void HandleMessageL(const CMPXMessage& aMessage, MGlxMediaList* aList);

    void HandlePopulatedL( MGlxMediaList* aList );

private:

    /** Second phase constructor */

	void ConstructL(const TDesC& aFileName);

    /** Constructor */

	CGlxCommandHandlerSlideshow(MGlxMediaListProvider* aMediaListProvider,

		TBool aStepBack, TBool aHasToolbarItem );

	/** 

	 * Helper function to activate the view with the relevant playback

	 * direction

	 */

	void ActivateViewL( NShwSlideshow::TPlayDirection aPlaybackDirection );

	/**

	 * Called when the owning view is deactivated

	 */

	void Deactivate();	

    /**

     * To check whether the focused container contains any slideshow playable item.

     * @param aCommandId The Command id

     * @param aList MediaList reference

     * @return TBool ETrue if container is not slideshow playable

     */

	TBool IsSlideshowNotPlayableOnFocusedContainer(TInt aCommandId, MGlxMediaList& aList);

	/**

	 * To update the floating toolbar in case of non-touch

	 */

	void UpdateToolbar();

private:

    // ID of owning view 

    TInt iViewId;

    // Not owned - HUI utility 

    CGlxUiUtility* iUiUtility;

    /// Resource file offset

	TInt iResourceOffset;

	// Flag to control where in the list we should be

	TBool iStepBack;

	// Buffer used by the stream

	CBufFlat* iBufFlat;

	// Storage buffer to pass the path to the view

	HBufC* iBuffer;

    /** Whether the command is shown in the active palette */

    TBool iShowInToolbar;

	};

#endif // C_GLXCOMMANDHANDLERSLIDESHOW_H