/*

* Copyright (c) 2007 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:  Base class for video preference setting list.

*

*/

#ifndef C_VTUIPEFSETTINGLISTBASE_H

#define C_VTUIPEFSETTINGLISTBASE_H

#include    <AknTransparentCameraSettingPage.h>

#include    "mvtuicommandui.h"

#include    "cvtuifeaturebase.h"

#include    "mvtuicomponent.h"

#include    "tvtuicomponentstate.h"

#include    "tvtuifeatureids.h"

#include    "mvtuisettingpageobserver.h"

class CVtUiAppUi;

class CVtUiTransparentSettingPage;

class MVtEngCameraPreferences;

/**

*  CVtUiPrefSettingListBase

*

*  Base class for color tone and white balance

*

*  @since S60 v3.2

*/

class CVtUiPrefSettingListBase : public CVtUiFeatureBase,

    public MAknSettingPageObserver, MVtUiSettingPageObserver

    {

public:

    /**

    * Destructor

    */

    ~CVtUiPrefSettingListBase();

    /**

    * has pending settingpange changed cmd cause camera cover switched.

    */

    TBool IsPendingCmd();

    /**

    * handle pending settingpange command

    */

    void HandlePendingCmdL();

public: // from MVtUiFeature

    /** 

    * @see MVtUiFeature::Stop 

    */

    virtual void Stop() = 0;

    /** 

    * @see MVtUiFeature::InitFeatureL

    */

    virtual void InitFeatureL();

protected: // from MAknSettingPageObserver

    /** 

    * @see MAknSettingPageObserver::HandleSettingPageEventL 

    */

    void HandleSettingPageEventL(

        CAknSettingPage* aSettingPage,

        TAknSettingPageEvent aEventType );    

protected: // from MVtUiSettingPageObserver

    /** 

    * @see MVtUiSettingPageObserver::ListStateChangedL

    */

    void ListStateChangedL();

protected:

     // Gets currently selected list item

     virtual TInt CurrentSelection() = 0;

     // Set items to setting page

     virtual void SetItemsL( CDesCArray& aArray ) = 0;

     // Gets resource id for selection list

     virtual TInt SettingPageResId() const = 0;

     // This function gets called when focus is moved

     // to new item in the settin page list

     virtual void SettingPageItemChangedL( TInt aIndex ) = 0;

     // Start function calls this

     void StartSettingPageL();

     // Stop function calls this

     void StopSettingPageL();

public: // from CCoeControl

    /* 

    * @see CCoeControl::SizeChanged

    */

    void SizeChanged();

public:  

    /** 

    * Updates setting pages background bitmap

    * @param aFrame Bitmap for setting page's backgound.

    */

    void UpdateBackground( CFbsBitmap* aFrame );

    /** 

    * Updates setting value

    * E.g disabling video will reset camera settings. and 

    * after enabling video camera setting value needs to be restored.

    */

    void UpdateSettingL();

protected:

    /**

     * Constructor

     */

    CVtUiPrefSettingListBase( CVtUiFeatureManager& aFeatureManager,

        TVtUiFeatureId aFeatureId );

     /**

     * 2nd constructor

     */

    void ConstructL();

    // Reads item from resource and appends it to the array

    void ReadAndAppendItemL( CDesCArray& aItems, TInt aResId );

private:

    // Does the initialisation of the setting page

    void CreateSettingPageL();

    // Resizes backround bitmap

    void ResizeBackroundBitmapRect( );

    // Sort controls window position

    void SortControlsWindowPoistion();

protected:    

    // Pointer to camera preferences

    MVtEngCameraPreferences* iCameraPref;

    // The original value (which was active when the

    // setting page was launched)

    TInt iOriginalSelection;

    // Supported color tone or white balance modes

    TUint32 iSupportedModes;

    // Contains currenltly supported items in setting page

    RArray< TInt> iActiveItems;

    // whether or not has a pending command

    TBool iPendingSettingChangeCmd;

private:

    // Owned setting page instance

    CVtUiTransparentSettingPage* iSettingPage;

    // Background bitmap for  setting page

    CFbsBitmap* iViewfinderBitmap;

    // Currently focused value 

    TInt iCurrentSelection;

    // Position of bitmap's top left corner

    TPoint iBitmapTopLeftCorner;

    // Background bitmap's clip rect

    TRect iBitmapClippingRect;

    // Reference to appui

    CVtUiAppUi& iAppUi;

    };

#endif // CVTUIPEFSETTINGLISTBASE_H