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 #include "cxutils.h"

    19 #include "cxuidisplaypropertyhandler.h"

    20 

    21 namespace {

    22     // Refresh period for the timer keeping backlight on.

    23     const int CXUI_BACKLIGHT_REFRESH_TIMEOUT = 3000;

    24 }

    25 

    26 CxuiDisplayPropertyHandler::CxuiDisplayPropertyHandler() :

    27     mBacklightTimer(this),

    28     mUtility(this)

    29 {

    30     // Setup backlight timer

    31     mBacklightTimer.setSingleShot(false);

    32     mBacklightTimer.setInterval(CXUI_BACKLIGHT_REFRESH_TIMEOUT);

    33     QObject::connect(&mBacklightTimer,

    34                      SIGNAL(timeout()),

    35                      this,

    36                      SLOT(simulateActivity()));

    37 }

    38 

    39 CxuiDisplayPropertyHandler::~CxuiDisplayPropertyHandler()

    40 {

    41     mBacklightTimer.stop();

    42 }

    43 

    44 /**

    45 * Utility to keep backlight on and screensaver out.

    46 * @param enabled True means backlight is kept on and screensaver is disabled.

    47 *                False means backlight may time out and screensaver may come

    48 *                on depending of user activity.

    49 */

    50 void CxuiDisplayPropertyHandler::setDisplayAlwaysVisible(bool enabled)

    51 {

    52     CX_DEBUG_ENTER_FUNCTION();

    53 

    54     if (enabled) {

    55         CX_DEBUG( ("CxuiDisplayPropertyHandler - setting display constantly on") );

    56         simulateActivity();

    57         mBacklightTimer.start();

    58     } else {

    59         CX_DEBUG( ("CxuiDisplayPropertyHandler - setting display to normal mode") );

    60         mBacklightTimer.stop();

    61     }

    62 

    63     CX_DEBUG_EXIT_FUNCTION();

    64 }

    65 

    66 void CxuiDisplayPropertyHandler::simulateActivity()

    67 {

    68     mUtility.resetInactivityTime();

    69 }