/*
* Copyright (c) 2008 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 classes for Usb notifier wrapper  
 *
*/


#ifndef C_CUSBNOTENOTIFIER_H
#define C_CUSBNOTENOTIFIER_H

#include <e32base.h>
#include "cusbnotifier.h"

class CUsbNotifManager;
class RNotifier;

/**
 * Base class of wrapper for showing RNotifier note.
 * Class implements showing note notifier by RNotifier API in asynchronized way 
 * which doesn't block the caller. When user gives some feedback on the note, 
 * the event will be forwarded to CUsbNotifManager and it does some handling.
 */
NONSHARABLE_CLASS( CUsbNoteNotifier) : public CUsbNotifier
    {
    /**
     * Active object of asynchronous showing notifier 
     */
    class CNotifierActive : public CActive
        {
        public:
            /**
             * Default constructor
             * @param aNotifier RNotifier API
             * @param aUsbNoteNotifier the note notifier container
             */
            CNotifierActive(RNotifier& aNotifier, CUsbNoteNotifier* aUsbNoteNotifier);
            
            /**
             * Destructor
             */
            virtual ~CNotifierActive();
        
            /**
             * Start to show the notifier
             */
            void StartL();
            
        protected:
            // From base class CActive
            /**
             * Caled when outstanding request completed
             */
            void RunL();

            /**
             * Called when outstanding request cancelled
             */
            void DoCancel();

            /**
             * Called when RunL leaves   
             * @param aError errorcode
             * @return errorcode 
             */
            TInt RunError(TInt aError);

        private:
            // data

            /**
             * The note notifier container 
             * Not Own 
             */
            CUsbNoteNotifier* iUsbNoteNotifier;
            
            /**
             * RNotifier API
             * Not Own 
             */
            RNotifier& iNotifier;

            /**
             * Response from notifier 
             */
            TPckg<TInt> iRes;
        };
public:

    /**
     * Destructor
     */
    virtual ~CUsbNoteNotifier();

    //From base class CUsbNotifier
    /**
     * Start to show notifier
     */
    virtual void ShowL();

    /**
     * Stop showing notifier
     */
    virtual void Close();

protected:

    /**
     * Default constructor
     * @param aNotifier RNotifier API
     * @param aNotifManager Manager
     * @param acat Category
     * @param aNotidId id 
     */
    CUsbNoteNotifier(RNotifier& aNotifier, CUsbNotifManager* aNotifManager,
            TUid aCat, TUint aNotifId);

    /**
     * 2nd phase constructor.
     */
    void ConstructL();
    
private:
    // data

    /**
     * Active object of handling RNotifier instance
     * Own 
     */
    CNotifierActive* iNotifierActive;
    
    /**
     * RNotifier API
     * Not Own 
     */
    RNotifier& iNotifier;
    };

#endif // C_CUSBNOTENOTIFIER_H