1 /*

     2  * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

     3  * All rights reserved.

     4  * This component and the accompanying materials are made available

     5  * under the terms of "Eclipse Public License v1.0"

     6  * which accompanies this distribution, and is available

     7  * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8  *

     9  * Initial Contributors:

    10  * Nokia Corporation - initial contribution.

    11  *

    12  * Contributors:

    13  *

    14  * Description:

    15  *

    16  */

    17 

    18 #ifndef NMAPIMESSAGETASK_H_

    19 #define NMAPIMESSAGETASK_H_

    20 

    21 #include <QObject>

    22 

    23 #include "nmenginedef.h"

    24 

    25 /**

    26  * base class for async tasks

    27  */

    28 class NMENGINE_EXPORT NmMessageTask : public QObject

    29 {

    30     Q_OBJECT

    31 protected:

    32     NmMessageTask( QObject *parent );

    33 

    34 public:

    35     virtual ~NmMessageTask();

    36 

    37 public slots:

    38     /*!

    39      * Starts task and returns true if starting succeeded.

    40      */

    41     virtual bool start()=0;

    42 

    43     /*!

    44      * Cancels started but not yet completed task. may not be applicable

    45      * in all tasks.

    46      */

    47     virtual void cancel() =0;

    48 

    49     signals:

    50     /*!

    51      * task failed, error code is specific to concrete task

    52      */

    53     void failed(int error);

    54     /*!

    55      * task canceled

    56      */

    57     void canceled();

    58 };

    59 

    60 #endif /* NMMESSAGETASK_H_ */