/*

* Copyright (c) 2007, 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 dialer activation watcher class

 *

*/

#ifndef C_USBUINOTIFDIALERWATCHER_H

#define C_USBUINOTIFDIALERWATCHER_H

#include <e32base.h>

#include <coecntrl.h> 

#include <viewclipartner.h> 

#include <viewcli.h> 

/**

 * Dialer activation callback

 *

 * This class specifies the functions when dialer is activated 

 * or note can be reactivated 

 * 

 */

class MDialerNotifier

    {

public:

    /**     

     * The function to be when Dialaer is activated

     *          

     */

    virtual void DialerActivated() = 0;

    /**     

     * The function to be when Dialaer is deactivated

     * and note can be shown again

     *          

     */

    virtual void ReActivateDialog() = 0;

    };

/** 

 *

 * This class will check if application key is pressed when error note is active. 

 * When application key is pressed dialer view is activated and error notifier is 

 * informed so it can dismis dialog. When dialer is deactivated error notifier is 

 * notified that dialog can be again shown.

 *

 */

NONSHARABLE_CLASS( CUsbuinotifDialerWatcher):  public CCoeControl,  

                                               public MVwsSessionWrapperObserver  

    {

public:

    /**

     * Two-phased constructor.     

     * @param aDialerKeyNotifier Callback interface for dialer activation/deactivation

     * @return dialer watcher

     */

    static CUsbuinotifDialerWatcher* NewL( MDialerNotifier* aDialerNotifier );

    /**

     * Two-phased constructor.

     * @param aDialerKeyNotifier Callback interface for dialer activation/deactivation     

     * @return dialer watcher 

     */

    static CUsbuinotifDialerWatcher* NewLC( MDialerNotifier* aDialerNotifier  );

    /**

     * Destructor

     */

    virtual ~CUsbuinotifDialerWatcher();

private:

    /**

     * From CCoeControl

     * @param aKeyEvent Key Event

     * @param aType Type of event

     */

    TKeyResponse OfferKeyEventL(const TKeyEvent& aKeyEvent,TEventCode aType);    

private:

    /**

     * From MVwsSessionWrapperObserver

     * @param aEvent View event

     */

    void HandleViewEventL(const TVwsViewEvent &aEvent);

private:

    /**

     * Constructor

     * @param aDialerKeyNotifier Callback interface for dialer activation/deactivation     

     */

    CUsbuinotifDialerWatcher( MDialerNotifier* aDialerKeyNotifier  );

    /**

     * Two-phased constructor.

     */

    void ConstructL();

private:

    // Member variables

    /**

     *  The observer for this objects events

     *  Not own. 

     */

    MDialerNotifier* iNotify;

    /**

     *  The observer for this objects events

     *  Own. 

     */

    CVwsSessionWrapper* iwsSession;

    /**

     * Is notifier allready notified. 

     */

    TBool iNotified;

    };

#endif // C_USBUINOTIFDIALERWATCHER_H