1 /* |
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2 * Copyright (c) 2007-2008 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: Implementation of CWsfScreenSaverWatcher |
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15 * |
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16 */ |
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17 |
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18 |
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19 // EXTERNAL INCLUDES |
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20 #include <e32cmn.h> |
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21 #include <ScreensaverInternalPSKeys.h> |
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22 |
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23 // CLASS HEADER |
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24 #include "wsfscreensaverwatcher.h" |
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25 |
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26 // INTERNAL INCLUDES |
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27 #include "wsfscreensaverstateobserver.h" |
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28 |
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29 |
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30 |
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31 // ---------------------------------------------------------------------------- |
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32 // CWsfScreenSaverWatcher::NewL |
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33 // ---------------------------------------------------------------------------- |
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34 // |
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35 CWsfScreenSaverWatcher* CWsfScreenSaverWatcher::NewL( |
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36 MWsfScreenSaverStateObserver& aObserver ) |
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37 { |
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38 CWsfScreenSaverWatcher* thisPtr = NewLC( aObserver ); |
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39 CleanupStack::Pop( thisPtr ); |
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40 return thisPtr; |
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41 } |
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42 |
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43 |
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44 // ---------------------------------------------------------------------------- |
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45 // CWsfScreenSaverWatcher::NewLC |
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46 // ---------------------------------------------------------------------------- |
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47 // |
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48 CWsfScreenSaverWatcher* CWsfScreenSaverWatcher::NewLC( |
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49 MWsfScreenSaverStateObserver& aObserver ) |
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50 { |
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51 CWsfScreenSaverWatcher* thisPtr = new ( ELeave ) CWsfScreenSaverWatcher( |
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52 aObserver ); |
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53 CleanupStack::PushL( thisPtr ); |
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54 thisPtr->ConstructL(); |
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55 return thisPtr; |
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56 } |
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57 |
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58 |
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59 // ---------------------------------------------------------------------------- |
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60 // CWsfScreenSaverWatcher::~CWsfScreenSaverWatcher |
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61 // ---------------------------------------------------------------------------- |
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62 // |
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63 CWsfScreenSaverWatcher::~CWsfScreenSaverWatcher() |
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64 { |
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65 Cancel(); |
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66 iProperty.Close(); |
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67 } |
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68 |
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69 |
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70 // ---------------------------------------------------------------------------- |
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71 // CWsfScreenSaverWatcher::CWsfScreenSaverWatcher |
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72 // ---------------------------------------------------------------------------- |
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73 // |
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74 CWsfScreenSaverWatcher::CWsfScreenSaverWatcher( |
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75 MWsfScreenSaverStateObserver& aObserver ): |
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76 CActive( EPriorityStandard ), |
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77 iObserver( &aObserver ) |
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78 { |
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79 } |
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80 |
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81 |
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82 // ---------------------------------------------------------------------------- |
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83 // CWsfScreenSaverWatcher::ConstructL |
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84 // ---------------------------------------------------------------------------- |
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85 // |
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86 void CWsfScreenSaverWatcher::ConstructL() |
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87 { |
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88 User::LeaveIfError( iProperty.Attach( KPSUidScreenSaver, |
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89 KScreenSaverOn ) ); |
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90 CActiveScheduler::Add( this ); |
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91 } |
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92 |
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93 |
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94 // ---------------------------------------------------------------------------- |
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95 // CWsfScreenSaverWatcher::RunL |
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96 // ---------------------------------------------------------------------------- |
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97 // |
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98 void CWsfScreenSaverWatcher::RunL() |
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99 { |
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100 // read the value of property |
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101 TBool screenSaverActive( EFalse ); |
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102 iProperty.Get( screenSaverActive ); |
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103 iObserver->ScreenSaverStatusChangedL( screenSaverActive ); |
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104 // reissue the request |
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105 StartStatusScanning(); |
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106 } |
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107 |
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108 |
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109 // ---------------------------------------------------------------------------- |
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110 // CWsfScreenSaverWatcher::DoCancel |
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111 // ---------------------------------------------------------------------------- |
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112 // |
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113 void CWsfScreenSaverWatcher::DoCancel() |
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114 { |
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115 iProperty.Cancel(); |
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116 } |
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117 |
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118 |
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119 // ---------------------------------------------------------------------------- |
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120 // CWsfScreenSaverWatcher::StartStatusScanning |
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121 // ---------------------------------------------------------------------------- |
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122 // |
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123 void CWsfScreenSaverWatcher::StartStatusScanning() |
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124 { |
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125 iProperty.Subscribe( iStatus ); |
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126 SetActive(); |
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127 } |
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128 |
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129 |
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130 // ---------------------------------------------------------------------------- |
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131 // CWsfScreenSaverWatcher::RunError |
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132 // ---------------------------------------------------------------------------- |
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133 // |
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134 TInt CWsfScreenSaverWatcher::RunError( TInt /*aError*/ ) |
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135 { |
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136 // issue the request so we will continue to receive |
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137 // state change notifications |
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138 StartStatusScanning(); |
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139 return KErrNone; |
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140 } |
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