/*

* Copyright (c) 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:   Screensaver view class defination.

*

*/

#ifndef C_SCREENSAVERVIEW_H

#define C_SCREENSAVERVIEW_H

#include <aknview.h>

#include <babitflags.h>

#include "screensaver.hrh"

//CLASS DECLARATION

class CScreensaverBase;

class CScreensaverEngine;

const TUid KUidScreensaverView ={ 1 };

//

// class CScreensaverView

// an empty place holder for when we are in the background

class CScreensaverView : public CAknView

    {

public:

    /**

    * Two-phased constructor

    */

    static CScreensaverView* NewL();

    /**

    * C++ default constructor

    */

    CScreensaverView();

    /**

    * Destructor

    */

    ~CScreensaverView();

    /**

    * Two-phased constructor

    */

    void ConstructL();

    /**

    * Creates the display object by the parameter

    * 

    */

    void CreateDisplayObjectL( TDisplayObjectType aType );

    /**

    * Resets the display object

    */

    void SetDisplayObject( TDisplayObjectType aType );

    /**

    * Creates the preview display object

    */

    void CreatePreviewDisplayObjectL();

    /**

    * Returns true the screensaver doesn't draw anything

    */

    TBool IsContentlessScreensaver() const;

public://From CAknView

    /**

    * Returns views id, intended for overriding by sub classes.

    * @return id for this view.

    */

    TUid Id() const;

    /** 

    * Handles a view activation and passes the message of type 

    * @c aCustomMessageId. This function is intended for overriding by 

    * sub classes. This function is called by @c AknViewActivatedL().

    * Views should not launch waiting or modal notes or dialogs in

    * @c DoActivateL.

    * @param aPrevViewId Specifies the view previously active.

    * @param aCustomMessageId Specifies the message type.

    * @param aCustomMessage The activation message.

    */

    void DoActivateL( const TVwsViewId& aPrevViewId, TUid aCustomMessageId,

        const TDesC8& aCustomMessage );

    /** 

    * View deactivation function intended for overriding by sub classes. 

    * This function is called by @c AknViewDeactivated().

    */

    void DoDeactivate();

    /**

    * Shows the display object

    */

    void ShowDisplayObject();

    /**

    * Hides the display object

    */

    void HideDisplayObject();

    /**

    * Update indicator attributes and refresh display

    */

    void UpdateAndRefresh();

private:

    /**

    * Returns the default type of screensaver

    */

    TDisplayObjectType DefaultScreensaverType();

    /**

    * Returns the psln setting type of screensaver

    */

    TDisplayObjectType PslnSettingScreensaverType();

    /**

    * Get the model of appui

    */

    CScreensaverEngine& Model() const;

    /**

    * Delete the display object

    */

    void DestroyDisplayObject();

private:

    /**

    * The type of current control

    */

    TDisplayObjectType iCurrentControlType;

    /**

    * The display object of screensaver

    * 

    * Owned

    */

    CScreensaverBase* iControl;

    /**

    * The plugin refresh rate

    */

    TInt iPluginRefreshRate;

    /**

    * True if the active screensaver doesn't draw (e.g None)

    */

    TBool iIsContentless;

    };

#endif // C_SCREENSAVERVIEW_H