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 #ifndef CXUISTANDBY_H

    18 #define CXUISTANDBY_H

    19 

    20 #include <QObject>

    21 

    22 // constants

    23 

    24 const int CXUI_STANDBY_CAMERA_TIMEOUT = 60000; // 60 seconds

    25 

    26 // forward declaration

    27 class HbDialog;

    28 class QTimer;

    29 class CxeEngine;

    30 class CxuiDocumentLoader;

    31 class CxuiCaptureKeyHandler;

    32 

    33 

    34 /*

    35 * class CxuiStandby continuously monitors for releasing camera when there are no user actions

    36 * for a specific time period. Timer is used to release the camera HW and switching to stanby mode

    37 * after a delay.Releasing the camera improves power efficiency, but creates additional latency

    38 * when returning to pre-capture view.

    39 */

    40 class CxuiStandby : public QObject

    41 {

    42     Q_OBJECT

    43 

    44 public:

    45     CxuiStandby(CxuiCaptureKeyHandler &keyHandler, CxuiDocumentLoader *documentLoader, CxeEngine *engine);

    46     ~CxuiStandby();

    47 

    48 public:

    49     void allowDismiss(bool allow);

    50     bool isActive() const;

    51 

    52 signals:

    53 

    54     /*

    55     * signal to prepare for standby

    56     */

    57     void aboutToEnterStandby();

    58 

    59     /*

    60     * signal to prepare UI for exiting standby

    61     */

    62     void aboutToExitStandby();

    63 

    64 public slots:

    65     void startTimer();

    66     void stopTimer();

    67     bool handleMouseEvent(QEvent *event);

    68     void enterStandby();

    69     void exitStandby();

    70 

    71 private slots:

    72 

    73     void dismissStandby();

    74 

    75 private: // helper methods

    76 

    77     bool proceedToStandy();

    78     bool eventFilter(QObject *object, QEvent *event);

    79 

    80 private:

    81 

    82     CxuiCaptureKeyHandler &mKeyHandler;

    83     CxuiDocumentLoader *mDocumentLoader; // not own

    84     CxeEngine *mEngine; // not own

    85     HbDialog *mStandbyPopup;

    86     QTimer *mStandbyTimer;

    87     bool mStandbyDialogVisible;

    88     bool mAllowDismiss;

    89 };

    90 

    91 #endif // CXUISTANDBY_H