/*

 * Copyright (c) 2005-2009 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:  Declares USB UI Queries notifier.

 *

 */

#ifndef USBUINQUERIESNOTIFIER_H

#define USBUINQUERIESNOTIFIER_H

// INCLUDES

#include "usbnotifier.h"      // Base class

#include <aknmemorycarddialog.h>

// CLASS DECLARATION

/**

 *  This class is used to show USB query dialogs.

 *

 *  @lib

 */

NONSHARABLE_CLASS(CUSBUIQueriesNotifier) : public CUSBUINotifierBase,

        public MAknMemoryCardDialogObserver

    {

public:

    // Constructors and destructor

    /**

     * Two-phased constructor.

     */

    static CUSBUIQueriesNotifier* NewL();

    /**

     * Destructor.

     */

    virtual ~CUSBUIQueriesNotifier();

public:

    // from MAknMemoryCardDialogObserver

    /**

     * To be notified when unlock completed

     * @param TInt aResult

     * @return void

     */

    void UnlockComplete(TInt aResult);

private:

    // Functions from base class

    /**

     * From CUSBUINotifierBase Called when a notifier is first loaded.        

     * @param None.

     * @return A structure containing priority and channel info.

     */

    TNotifierInfo RegisterL();

    /**

     * From CUSBUINotifierBase The notifier has been deactivated 

     * so resources can be freed and outstanding messages completed.

     * @param None.

     * @return None.

     */

    void Cancel();

    /**

     * From CUSBUINotifierBase Gets called when a request completes.

     * @param None.

     * @return None.

     */

    void RunL();

    /**

     * From CUSBUINotifierBase Used in asynchronous notifier launch to 

     * store received parameters into members variables and 

     * make needed initializations.

     * @param aBuffer A buffer containing received parameters

     * @param aReplySlot A reply slot.

     * @param aMessage Should be completed when the notifier is deactivated.

     * @return None.

     */

    void GetParamsL(const TDesC8& aBuffer, TInt aReplySlot,

            const RMessagePtr2& aMessage);

private:

    /**

     *  C++ default constructor.

     */

    CUSBUIQueriesNotifier();

private:

    // New functions

    /**

     * Unlock the locked memory card

     * First inform user that the memory card is locked and then show the

     * memory card dialog for unlocking. 

     * @param aStringHolder   The string for the query. 

     * @param aCoverDialogId  The dialog ID for the cover UI.

     * @return KErrNone - user accepted, KErrCancel - End call key pressed

     */

    TInt UnlockMemoryCardL(const TDesC& aStringHolder, TInt aCoverDialogId);

    /**

     * Show query dialog 

     * @param aStringHolder   The string for the query. 

     * @param aCoverDialogId  The dialog ID for the cover UI.

     * @param aIsCancelKey    Does the dialog show Cancel key.

     * @return KErrNone - accepted, KErrCancel - Cancel or End call key

     */

    TInt QueryUserResponseL(const TDesC& aStringHolder, TInt aCoverDialogId,

            TBool aIsCancelKey);

    /**

     * Get attributes for the query dialog

     * The query type is idenfied by the member variable iQueryType.

     * The caller should pop and destroy the returned heap descriptor 

     * when it is no longer needed.

     * @param aCoverDialogId  Returned dialog ID for the cover UI.

     * @param aIsCancelKey    Returned info about showing the Cancel key.

     * @return                The string holder for the query. 

     */

    HBufC* GetQueryAttributesLC(TInt& aCoverDialogId, TBool& aIsCancelKey);

private:

    // Data

    /**

     * Query

     * Not own, destroys self when lauched.

     */

    CAknQueryDialog* iUSBQueryDlg;  

    TUSBUIQueries iQueryType; // To store the type of the query

    TInt iDriveLetter; // For MMC locked case

    // Used for possible Cancel while the dialog is showing

    CAknMemoryCardDialog* iMemoryCardDialog;

    };

#endif // USBUINQUERIESNOTIFIER_H