/*

* Copyright (c) 2005 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:    Declaration of EqualizerPresetsDialog class

*

*/

#ifndef EQUALIZERPRESETSDIALOG_H

#define EQUALIZERPRESETSDIALOG_H

// INCLUDES

#include <AknDialog.h> 

#include <aknlists.h>

#include <EqualizerConstants.h>

#include <AudioEqualizerUtility.h>

// CLASS DECLARATION

class CEqualizerPresetListArray;

class CEqualizerEditingDialog;

/**

* This class is used to notify the client application about the activation

* of a new preset.

*  

*  @lib Equalizer.lib

*  @since Series 60 3.0

*/

NONSHARABLE_CLASS(MEqualizerPresetActivationObserver)

    {

    public: // New functions

        /**

        * This member is called by the Equalizer UI when the user activates 

        * a new preset. 

        * @ since Series 60 3.0

        * @ aActivatedPreset It is KEqualizerPresetNone if the preset "None"

        * is active. Otherwise, it is the value of 

        * TEfAudioEqualizerUtilityPreset::iPresetNameKey for the entry

        * whose TEfAudioEqualizerUtilityPreset::iPresetName matches the

        * activated preset name, in the array retrieved using 

        * CAudioEqualizerUtility::Presets().

        */

        virtual void HandlePresetActivation (TInt aActivatedPreset) = 0;

   };

/**

*  This class is used to display the preset list view of the Equalizer.

*  

*  @lib Equalizer.lib

*  @since Series 60 3.0

*/

class CEqualizerPresetsDialog : public CAknDialog

#ifdef RD_SCALABLE_UI_V2

                              , public MEikListBoxObserver

#endif //RD_SCALABLE_UI_V2

    {

    public:     //Constructors and Destructors

        /**

        * This function is called to create an object of 

        * type CEqualizerPresetsDialog - Two phase Construction

        * @since 3.0

        * @param aAudEqUtility a reference to CAudioEqualizerUtility 

        * @param aCurrentActivePreset It is KEqualizerPresetNone if the preset

        * "None" is active. Otherwise, it is the value of 

        * TEfAudioEqualizerUtilityPreset::iPresetNameKey for the entry

        * whose TEfAudioEqualizerUtilityPreset::iPresetName matches the

        * activated preset name, in the array retrieved using 

        * CAudioEqualizerUtility::Presets().

        * @param aEqualizerPresetActivationObserver a reference to an object 

        * of type MEqualizerPresetActivationObserver         

        */

        IMPORT_C static CEqualizerPresetsDialog* NewL(

           CAudioEqualizerUtility* aAudEqUtility,

           TInt aCurrentActivePreset, 

           MEqualizerPresetActivationObserver& aEqrPresetActObserver);

        /**

        * Destructor

        * @since 3.0

        */

        virtual ~CEqualizerPresetsDialog();

    private: //New functions

        /**

        * Second Phase Constructor

        * @since 3.0

        * @param aCurrentActivePreset the index into the preset array retrieved

        * with the method CAudioEqualizerUtility::Presets()if a preset other 

        * than "None" is active. It is KEqualizerPresetNone if the preset 

        * "None" is active.

        */

        void ConstructL(const TInt aCurrentActivePreset);

        /**

        * This function is called to create an object of 

        * type CEqualizerPresetsDialog - First Phase Constructor

        * @since 3.0

        * @param aAudEqUtility a reference to CAudioEqualizerUtility 

        * @param aEqualizerPresetActivationObserver a reference to an object 

        * of type MEqualizerPresetActivationObserver         

        */

        CEqualizerPresetsDialog (

           CAudioEqualizerUtility* aAudEqUtility,

           MEqualizerPresetActivationObserver& aEqrPresetActObserver);

        /**

        * This function is called to get a free preset name

        * @since 3.0

        * @param aName Used to reurn a free preset name

        */

        void BuildPresetNameL( TDes& aName) const;

        /**

        * This function returns the highlighted Preset in ListBox

        * @since 3.0

        * @return      Highlighted Preset e.g. "None"

        */

        TPresetName GetHighlightedPresetInListBox() const;

        /**

        * This function is called to find the index of a preset in the list

        * of presets returned by CAudioEqualizerUtility::Presets()

        * @since 3.0

        * @param aPreset The preset focussed in ListBox

        * @return index of the highlighted preset in the ListBox in the 

        * list of presets returned by CAudioEqualizerUtility::Presets() 

        */

        TInt GetEngineIndexL(const TPresetName& aPreset) const; 

        /**

        * This function is used for the activation of a preset

        * @since 3.0

        * @param aIndex The index of the preset in the ListBox

        * @param aPresetName The name of the preset

        */

        void ActivateEqrPresetL(const TInt aIndex, const TDesC& aPreset);

        /**

        * This function is used for the editing of a preset

        * @since 3.0

        * @param aIndex The index of the preset in the ListBox

        * @param aPresetName The name of the preset

        */

        void EditEqrPresetL(const TInt aIndex, const TDesC& aPreset);

        /**

        * This function is used for the creation of a new preset

        * @since 3.0

        * @param aIndex The index of the preset in the ListBox. This is set

        * to a the index in the ListBox if preset creation is successful. 

        * If the creation is unscuccessful, then the parameter is not changed.

        * @param aPreset The name of the preset created

        */

        void CreateNewEqrPresetL(TInt& aIndex, TPresetName& aPreset) const;

        /**

        * This function is used for the renaming of a preset

        * @since 3.0

        * @param aIndex The index of the preset in the ListBox

        * @param aPresetName The name of the preset

        */

        void RenameEqrPresetL(const TInt aIndex, const TDesC& aPreset); 

        /**

        * This function is used for the deletion of a preset

        * @since 3.0

        * @param aIndex The index of the preset in the ListBox

        * @param aPresetName The name of the preset

        */

        void DeleteEqrPresetL(const TInt aIndex, const TDesC& aPreset);

        /**

        * This function is used to display a dialog to query the user

        * for a new name. It is used while creating a new preset or 

        * renaming an existing preset.

        * @since 3.0

        * @param aResourceId The resource id to use for the dialog

        * @param aPresetName 

        * @return       ETrue if the user did not cancel the dialog box 

        *               EFalse otherwise 

        */

        TBool GetNewNameL(const TInt aResourceId, TDes& aPresetName) const; 

        /**

        * This function is used to load the ListBox icons in an array

        * @since 3.0

        * @returns   array of ListBox icons 

        */

        CArrayPtr<CGulIcon>* GetListBoxIconsL() const;

        /**

        * This function is used to inform the client application about the 

        * currently active preset 

        * engine 

        * @since 3.0

        */

        void SetCurrentPreset(const TPresetName& aPreset);

        /**

        * This function is used to rturn the currently active preset 

        * engine 

        * @since 3.0

        */        

        TPresetName CurrentPreset() const;

        /**

        * This function is used to search for a preset name in the ListBox

        * @since 3.0

        * @param aPreset The preset name to search for 

        * @return It returns the index of the preset, if found and 

        *  KErrNotFound if not found.

        */

        TInt SearchPresetL(const TPresetName& aPreset) const;

        /**

        * This function is used to display a dialog to the user for 

        * editing a particular preset.

        * @since 3.0

        * @param aAudEqUtility pointer to CAudioEqualizerUtility

        * @param aIndex the index of the preset in the array of presets 

        * @param aIsActive whether the preset is active or not? 

        * returned by CAudioEqualizerUtility::Presets() 

        */

        void DisplaySettingsL(CAudioEqualizerUtility* aAudEqUtility, 

        const TInt aIndex, const TBool aIsActive);

        /**

        * This function is used to display a note to the user if 

        * memory is below critical level when creating a new preset.

        * @since 3.1

        */

        void ShowDiskFullNoteL() const;

    public: 

        /**

        * This function is used to execute the Dialog.

        * @since 3.0

        * @returns return value of CAknDialog::ExecuteLD()   

        */

        IMPORT_C TInt ExecuteLD();

        /**

        * This function is used to set new values for CAudioEqualizerUtility* 

        * @since 3.0

        * @param aAudEqUtility New pointer to CAudioEqualizerUtility

        */

        IMPORT_C void SetAudioEqualizerL(CAudioEqualizerUtility* aAudEqUtility);

    private: //Functions from base classes

        /**

        * From CAknDialog

        * This function responds to the size changes to sets the 

        * size and position of the 

        * contents of this control.

        */

        void SizeChanged();

        /**

        * From CAknDialog

        * Handles changes to the application 

        * when it switches to or from the foreground.

        */

        void HandleForegroundEventL( TBool aForeground);

        /**

        * From CAknDialog

        * Responds to a change in focus.

        * This is called whenever the control gains or loses focus

        */

        void FocusChanged(TDrawNow aDrawNow);

        /**

        * From CCoeControl

        * This function is called when there is a Skin change event

        * or layout change event

        */     

        void HandleResourceChangeL(TInt aType);

        /**

        * This function is called when there is a Skin change event

        * or layout change event, it calls HandleResourceChangeL()

        */     

        void HandleResourceChange(TInt aType);

        /**

        * From CAknDialog Called when a key event happens.

        */

        TKeyResponse OfferKeyEventL(const TKeyEvent& aKeyEvent, 

            TEventCode aType ); 

        /**

        * From CAknDialog Called just before the dialog is displayed.

        */

        void PreLayoutDynInitL(void); 

        /**

        * From CAknDialog Called to process a user's menu command.

        */

        void ProcessCommandL(TInt  aCommandId); 

        /**

        * From CAknDialog Called just before the menu pane is displayed

        */

        void DynInitMenuPaneL(TInt aResourceId, CEikMenuPane* aMenuPane);

        /**

        * From CAknDialog Called when OK key is pressed

        */

        TBool OkToExitL(TInt aButtonId); 

        /**

        * Get help context for the control.

        * @param aContext The context that is filled in.

        * @return None.

        */

        void GetHelpContext( TCoeHelpContext& aContext ) const;

#ifdef RD_SCALABLE_UI_V2

        /**

        * From MEikListBoxObserver

        * Handles listbox events.

        * @param aListBox Listbox where the event occurred.

        * @param aEventType Event type.

        *

        */

        void HandleListBoxEventL( CEikListBox* aListBox,

                                  TListBoxEvent aEventType );

#endif //RD_SCALABLE_UI_V2

    private:

        // Used to store whether the "OK" key has been pressed or not

        // and accordingly invoke appropriate code in DynInitMenuPaneL().

        // It is set to ETrue in OkToExitL() when the key pressed is "OK"

        // and set to EFalse in DynInitMenuPaneL() after the "Context

        // Sensitive" menu handling has been done.

        TBool iContextSensitiveMenu;

        // Used to store the offset of the resource file

        TInt iResourceFileOffset;

        // The ListBox control

        CAknSingleGraphicStyleListBox* iListBox;

        // Name of currently active preset

        TPresetName iActivePreset;                

        // Application title text

        HBufC* iAppTitleText; 

        // Preset "None" Text

        HBufC* iPresetNoneText;

        // Equalizer's title text

        HBufC* iTitleText;    

        // Used to store a pointer to CAudioEqualizerUtility

        CAudioEqualizerUtility* iAudEqUtility;

        // Used to store a reference to the observer class

        MEqualizerPresetActivationObserver& iEqrPresetActObserver;

        // ListBox Item Array

        CEqualizerPresetListArray* iItemArray;

        // Ignore Key events between track changes

        TBool iIgnoreKeyEvents;

        //Editing dialog

        CEqualizerEditingDialog *iEditingDialog;

        CRepository* iRepository;

		// Status pane layout before launching this dialog

		TInt iPreviousStatusPaneLayout;

    };

#endif  // EQUALIZERPRESETSDIALOG_H

// End of File