/*

* 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:  Manages all settings data.

*

*/

#ifndef CAMSETTINGSMODEL_H

#define CAMSETTINGSMODEL_H

// INCLUDES

#include <eikenv.h>

#include "Cam.hrh"

#include "mcamsettingsmodel.h"

#include "CamBurstModeObserver.h"

#include "mcamsettingpreviewhandler.h"

#include "camconfigurationconstants.h"

// CONSTANTS

// FORWARD DECLARATIONS

class MCamSettingsModelObserver;

class CCamVideoQualityLevel;

class CCamStaticSettingsModel;

class MCamStaticSettings;

class CCamConfiguration;

class CCameraUiConfigManager;

// STRUCTS

// CLASS DECLARATIONS

/**

* Manages all static settings data.

* @since 2.8

*/

class CCamSettingsModel : public CBase,

                          public MCamSettingsModel,

                          public MCamSettingPreviewHandler,

       /** to be removed*/public MCamBurstModeObserver

  {

  // =========================================================================

  public: // Constructors and destructor

    /**

    * Symbian two-phased constructor.

    * @param aConfiguration

    * @since 2.8

    * engine changes.

    */

    static CCamSettingsModel* NewLC( CCamConfiguration& aConfiguration );

    /**

    * Symbian two-phased constructor.

    * @param aConfiguration

    * @since 2.8

    * engine changes.

    */

    static CCamSettingsModel* NewL( CCamConfiguration& aConfiguration );

    /**

    * Destructor.

    */

    ~CCamSettingsModel();

  public:

   /** 

    * Saves user defined FT setting

    * @since S60 5.0

    * @param None

    * @return None

    */

    void StoreFaceTrackingValue(); 

    /**

    * Returns the face tracking state as it was before the latest scene mode change

    */  

    TCamSettingsOnOff GetPreviousFaceTrack();

    /**

    * Sets the face tracking state as it was before the latest scene mode change

    */  

    void SetPreviousFaceTrack( TCamSettingsOnOff aPreviousFaceTrack );

    /**

    * Returns the scene mode that was in use before the current scene mode was selected

    */ 

    TCamSceneId GetPreviousSceneMode();

    /**

    * Sets the scene mode that was in use before the current scene mode was selected

    */  

    void SetPreviousSceneMode( TCamSceneId aPreviousSceneMode );

  // -------------------------------------------------------------------------

  // From base class MCamSettingsModel

  public:

    /**

    * Add a settings model observer.

    * Observers will be notified of settings changes.

    */

    virtual void AttachObserverL( const MCamSettingsModelObserver* aObserver );

    /**

    * Remove a settings model observer.

    */

    virtual void DetachObserver( const MCamSettingsModelObserver* aObserver );

    /**

    * Resets all user scene settings to their defaults.

    * @since 2.8

    */

    virtual void ResetUserSceneL();

    /**

    * Returns the current integer value for the specified setting

    * @return the current integer setting value

    * @param aSettingItem specifies which setting item that want the value of.

    * @since 2.8

    */

    virtual TInt IntegerSettingValue( TInt aSettingItem ) const; 

    /**

    * Returns the setting value for a specific field of a scene 

    * @return the setting value

    * @param aSceneId specifies which scene.

    * @param aSceneId specifies which field of the scene.

    * @since 2.8

    */

    virtual TInt SceneSettingValue( TInt aSceneId, TInt aSceneField ) const; 

    /**

    * Sets a new value for the specified integer setting

    * @param aSettingItem specifies which setting item that want to set the value of.

    * @param aSettingValue the new integer value for the specified setting item.

    * @since 2.8

    */

    virtual void SetIntegerSettingValueL( TInt aSettingItem, TInt aSettingValue ); 

    /**

    * Sets a new text value for the specified setting

    * @param aSettingItem specifies which setting item that want to set the text value of.

    * @param aSettingValue the new text value for the specified setting item.

    * @since 2.8

    */

    virtual void SetTextSettingValueL(       TInt aSettingItem, 

                                       const TDesC& aSettingValue ); 

    /**

    * Returns the current text value for the specified setting

    * @return the current text setting value

    * @param aSettingItem specifies which setting item that want the text value of.

    * @since 2.8

    */

    virtual TPtrC TextSettingValue( TInt aSettingItem ) const; 

    /**

    * Returns whether a particular setting value can be set or not.

    * @return ETrue if can be set. Otherwise, EFalse.

    * @param aSettingValue the value in question. 

    * @param aSettingItem the setting item in question. 

    * @since 2.8

    */

    virtual TBool SettingValueEnabled( TInt aSettingItem, 

                                       TInt aSettingValue ) const;

    /**

    * Get the default value for a setting item.

    * @param  aSettingId The id of the setting.

    * @return The default value for setting item or KErrNotFound if not found.

    */

    virtual TInt DynamicSettingDefaultValue( TInt aSettingId ) const;

    /**

    * Sets all dynamic settings to their defaults.

    * @since 2.8

    */       

    virtual void SetDynamicSettingsToDefaults();

    /**

    * Sets a single dynamic setting to its default.

    * @since 2.8

    */       

    virtual void SetDynamicSettingToDefault(TInt aSettingItem);

    /**

    * Sets a single dynamic setting to scene default value.

    * @param  aSceneId    Scene which the default value is taken from.

    * @param  aSceneField Id of the setting in scene data.

    * @param  aSettingId  Id of the setting in dynamic settings.

    * @param  aVideoScene Is the scene a video scene.

    * @return KErrNotFound, if setting could not be set.

    */

    virtual TInt SetDynamicSettingToSceneDefaultL( TInt  aSceneId,

                                                   TInt  aSceneField,

                                                   TInt  aSettingId,

                                                   TBool aVideoScene );

    /**

    * Loads the static settings from shared data. Required to update

    * the settings whenever get foreground event, in case of external

    * changes to the settings.

    * @since 2.8

    * @param aIsEmbedded Specifies whether the application is embedded

    * or not.

    */       

    virtual void LoadStaticSettingsL( TBool aIsEmbedded );

    /**

    * Return handle to video quality level array

    * @since 2.8

    * @return reference to array of video quality levels

    */

    virtual const RPointerArray<CCamVideoQualityLevel>& VideoQualityArray();

    /**

    * Return handle to video resolution array

    * @since 2.8

    * @param return reference to array of video resolutions

    */

    virtual const RArray<TSize>& VideoResolutions();

    /** 

    * Returns the image resolution for a given resolution index.

    * @since 2.8

    * @param aIndex The index to get the resolution for

    * @returns The X and Y dimensions in pixels of the resolution.

    */

    virtual TSize ImageResolutionFromIndex( TCamPhotoSizeId aIndex );

    /**

    * Returns the current photo quality.

    * @return the quality.

    * @since 2.8

    */

    virtual TInt CurrentPhotoCompression() const;

    /**

    * Returns the current photo resolution from Settings

    * @return the resolution.

    * @since 2.8

    */

    virtual TCamPhotoSizeId CurrentPhotoResolution() const;

    /**

    * Returns the photo resolution for a particular quality

    * @return the resolution.

    * @param aQualityIndex The index of the quality

    * @since 3.0

    */

    virtual TCamPhotoSizeId PhotoResolution( TInt aQualityIndex ) const;

    /**

    * Stores the primary camera settings when changing to secondary camera

    * that they can be reapplied when changing back

    * @since 2.8

    */

    virtual void StorePrimaryCameraSettingsL();

    /**

    * Restores the primary camera settings 

    * @since 2.8

    */

    virtual void RestorePrimaryCameraSettingsL();

    /**

    * Return variant info.

    */

    virtual const TCamVariantInfo& VariantInfo();

    /*

    * Reset repository file

    * @since3.0

    */

    virtual void ResetRepository();

  // -------------------------------------------------------------------------

  // From base class MCamSettingPreviewHandler

  public:

    /**

    * Activates preview for one setting.

    * Returns the preview value as setting value in ProvideCameraSettingL

    * until Commit or Cancel is called.

    * @param aSettingId    The setting for which preview is set

    * @param aSettingValue The setting value used for preview

    * @leave Any system error code.

    */

    virtual void ActivatePreviewL( const TCamSettingItemIds& aSettingId,

                                   TInt                      aSettingValue );

    /**

    * Cancels the preview for one setting. 

    * After this call ProvideCameraSettingL returns the actual setting value.

    * If the setting does not have active preview, such error is ignored.

    * @param aSettingId Id of the setting for which the preview is cancelled.

    */

    virtual void CancelPreview( const TCamSettingItemIds& aSettingId );

    /**

    * Cancels the preview for a set of settings.

    * If some of the settings do not have active preview, such error is ignored.

    */

    virtual void CancelPreviews( const RArray<TCamSettingItemIds> aSettingIds );

    /**

    * Cancels all previews.

    * No error reported, if no previews active.

    */

    virtual void CancelAllPreviews();

    /**

    * Commits the preview value for the given set of settings.

    * After this call completes, the preview is no more active for the setting.

    * If the call completes successfully, the preview is stored as the

    * actual setting value. If leave occurs, the preview is not stored.

    * @param aSettingId Id of the setting for which the preview is committed.

    * @leave KErrArgument There was no preview value for the given setting.

    * @leave Any system error code.

    */

    virtual void CommitPreviewL( const TCamSettingItemIds& aSettingId );

    /**

    * Commits the preview for a set of settings.

    * If some of the settings do not have active preview, such error is ignored.

    */

    virtual void CommitPreviewsL( const RArray<TCamSettingItemIds>& aSettingIds );

    /**

    * Commit previews for all settings with active preview.

    * @leave Any system error code.

    */

    virtual void CommitAllPreviewsL();

    /**

    * Get the set of settings with active preview.

    * Preview is active if it has been set with ActivatePreviewL

    * but not cancelled or committed after that.

    * @param aSettingIds Return the ids of the active settings in this array.

    */

    virtual void ActivePreviewsL( RArray<TCamSettingItemIds>& aSettingIds ) const;

  // -------------------------------------------------------------------------

  // New methods

  public:

    /*

    * Sets user scene setting to default

    */

	void SetUserSceneDefault(); 

	/*

    * Gets the handle to the settings model, which is used inturn by the

    * plugin to call the interfaces for performing needed actions.

    */

    MCamStaticSettings& StaticSettingsModel() const;

    /**

    * Loads the static settings from shared data, or if unable to from the resource file. 

    * @since 2.8

    */       

    void LoadSettingsL();   

    /**

    * Saves the static settings to shared data.

    * @since 2.8

    */       

    void SaveSettingsL() ;

    /*

    * Is Scene supported

    */

    TBool IsImageSceneSupported( const TInt aSceneId ) const;

    /*

    * Is Scene supported

    */

    TBool IsVideoSceneSupported( const TInt aSceneId ) const;

    /*

    * Returns UiConfigManager Ptr from StaticSettingsModel

    */

    CCameraUiConfigManager* UiConfigManagerPtr();

  private:

    /**

    * Saves one static setting to Central Repository.

    * @param aSettingId Id of the setting to be saved. 

    * @since Camera 4.0

    */

    void SaveStaticSettingL( TCamSettingItemIds aSettingId );

    /**

    * Get the associated settings list for given setting item.

    * @param aSettingId Id of the setting for which the list is requested.

    * @since Camera 4.0

    */

    RPointerArray<TIntSetting>* 

      MapSettingItem2SettingsList( TCamSettingItemIds aSettingId );

  // -------------------------------------------------------------------------

  // Constructors

  private:

    /**

    * C++ constructor.

    * @since 2.8

    */

    CCamSettingsModel( CCamConfiguration& aConfiguration );

    /**

    * C++ 2nd phase constructor.

    * @since 2.8

    */

    void ConstructL();

  // -------------------------------------------------------------------------

  // new functions

  private: 

    // Notify setting model observers, that a setting item value has changed.

    void NotifyObservers( TCamSettingItemIds aSettingId, 

                          TInt               aSettingValue );

    void NotifyObservers( TCamSettingItemIds aSettingId, 

                          const TDesC&       aSettingValue );

    /**

    * Read variant flags from Central Repository.

    */

    void ReadVariantFlagsL();

    /**

    * Resets all user scene settings to their defaults without 

    * activating them.

    * @since 2.8

    */

    void ResetUserSceneWithoutActivatingChangesL();

    /**

    * Copies a user scene setting across to the capture setup settings.

    * @since 2.8

    * @param aSettingItem the user scene setting to copy.

    */

    void CopyUserSceneSettingToCaptureSettingL( TInt aSettingItem );

    /**

    * Activates the current user scene settings.

    * @since 2.8

    */

    void ActivateUserSceneSettingsL();

    /**

    * Returns whether a particular setting is an engine setting, or not.

    * @since 2.8

    * @param aSettingItem The id of the setting item.

    * @return ETrue if an engine setting. Otherwise EFalse.

    */

    TBool SettingIsForEngine( TInt aSettingItem );

    /**

    * Searches in a settings list for a particular setting item..

    * @param aSettingsList the setting list to search in.

    * @param aSettingItem the id of the setting item to look for.

    * @return the index of the setting item if found. Otherwise returns KErrNotFound .

    * @since 2.8

    */

    TInt SearchInSettingsListFor( 

            const RPointerArray<TIntSetting>& aSettingsList, 

                  TInt                        aSettingItem  ) const;

    /**

    * Finds a scene in a particular scene list.

    * @param aSceneItemId the id of the scene to search for.

    * @param aSceneList the scene list to search in.

    * @return the index to the scene in the list.

    * @since 2.8

    */

    TInt FindSceneInSceneList( 

                  TInt                       aSceneItemId, 

            const RPointerArray<TSceneData>& aSceneList   ) const;

    /**

    * Handles a change in the value for the user scene setting.

    * @param aSettingValue The new scene value.

    * @param aActivate Whether to activate the user scene changes

    * @since 2.8

    */

    void UserSceneHasChangedL( TInt aSettingValue, TBool aActivate );

    /**

    * Handles a change in the value for the photo scene setting.

    * That is, it updates the rest of the photo dynamic setings.

    * @param the new scene value.

    * @since 2.8

    */

    void PhotoSceneHasChangedL( TInt aSettingValue );

    /**

    * Handles a change in the value for the video scene setting.

    * That is, it updates the rest of the video dynamic setings.

    * @since 2.8

    * @param aSettingValue The new scene value.

    */

    void VideoSceneHasChangedL( TInt aSettingValue );