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:  Base class for all screensavers.

    15 *

    16 */

    17 

    18 #ifndef SCREENSAVER_H

    19 #define SCREENSAVER_H

    20 

    21 #include <QGraphicsWidget>

    22 

    23 #include "screensavermodel_global.h"

    24 

    25 class ScreensaverPrivate;

    26 

    27 enum ScreensaverState

    28 {

    29     ScreensaverStateConstructed = 0,

    30     ScreensaverStateInitialized,

    31     ScreensaverStateBackground,

    32     ScreensaverStateForeground,

    33     ScreensaverStatePartialForeground,

    34     ScreensaverStatePowerSave,

    35     ScreensaverStateClosed

    36 };

    37 

    38 class SREENSAVERMODEL_EXPORT Screensaver : public QObject

    39 {

    40     Q_OBJECT

    41 

    42 public:

    43 

    44     Screensaver(QObject *parent = 0);

    45     virtual ~Screensaver();

    46 

    47     ScreensaverState currentState();

    48 

    49 public slots:

    50 

    51     void initialize();

    52     void foreground();

    53     void partialForeground();

    54     void background();

    55     void powerSave();

    56     void close();

    57 

    58 protected:

    59 

    60     virtual bool onInitialize();

    61     virtual bool onForeground() = 0;

    62     virtual bool onPartialForeground() = 0;

    63     virtual bool onBackground() = 0;

    64     virtual bool onPowerSave() = 0;

    65     virtual bool onClose();

    66 

    67 signals:

    68 

    69     void faulted();

    70     void viewChanged(QGraphicsWidget *widget);

    71 

    72 private:

    73 

    74     Q_DISABLE_COPY(Screensaver)

    75 

    76 private:

    77 

    78     ScreensaverPrivate * const m_d;

    79     friend class ScreensaverPrivate;

    80 

    81 };

    82 

    83 #endif // SCREENSAVER_H