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1 /* |
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2 * Copyright (c) 2002 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: |
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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 // INCLUDE FILES |
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20 #include "propertyobserver.h" |
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21 |
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22 |
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23 // ============================ MEMBER FUNCTIONS =============================== |
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24 |
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25 // ----------------------------------------------------------------------------- |
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26 // CPropertyObserver::CPropertyObserver |
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27 // C++ default constructor can NOT contain any code, that |
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28 // might leave. |
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29 // ----------------------------------------------------------------------------- |
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30 // |
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31 CPropertyObserver::CPropertyObserver(MPropertyChangeHandler& aHandler, |
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32 const TUid& aCategory, |
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33 const TUint& aKey) |
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34 : CActive( CActive::EPriorityStandard ), |
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35 iCategory( aCategory ), |
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36 iKey( aKey ), |
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37 iHandler( aHandler ) |
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38 { |
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39 } |
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40 |
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41 // ----------------------------------------------------------------------------- |
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42 // CPropertyObserver::ConstructL |
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43 // Symbian 2nd phase constructor can leave. |
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44 // ----------------------------------------------------------------------------- |
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45 // |
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46 void CPropertyObserver::ConstructL(void) |
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47 { |
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48 CActiveScheduler::Add( this ); |
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49 |
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50 User::LeaveIfError( iProperty.Attach( iCategory, iKey ) ); |
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51 |
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52 // Start observing... |
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53 Subscribe(); |
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54 |
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55 // Notify the initial value if needed... |
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56 // NotifyCurrentValue(); |
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57 } |
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58 |
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59 // ----------------------------------------------------------------------------- |
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60 // CPropertyObserver::NewL |
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61 // Two-phased constructor. |
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62 // ----------------------------------------------------------------------------- |
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63 // |
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64 CPropertyObserver* CPropertyObserver::NewL(MPropertyChangeHandler& aHandler, |
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65 const TUid& aCategory, |
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66 const TUint& aKey) |
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67 { |
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68 CPropertyObserver* self = new( ELeave )CPropertyObserver( aHandler, aCategory, aKey ); |
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69 CleanupStack::PushL( self ); |
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70 self->ConstructL(); |
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71 CleanupStack::Pop( self ); |
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72 return self; |
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73 } |
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74 |
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75 // Destructor |
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76 CPropertyObserver::~CPropertyObserver() |
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77 { |
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78 Deque(); |
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79 iProperty.Cancel(); |
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80 iProperty.Close(); |
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81 } |
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82 |
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83 // ----------------------------------------------------------------------------- |
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84 // CPropertyObserver::RunL |
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85 // (other items were commented in a header). |
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86 // ----------------------------------------------------------------------------- |
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87 // |
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88 void CPropertyObserver::RunL(void) |
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89 { |
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90 if( iStatus.Int() == KErrNone ) |
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91 { |
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92 Subscribe(); |
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93 NotifyCurrentValue(); |
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94 } |
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95 } |
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96 |
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97 // ----------------------------------------------------------------------------- |
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98 // CPropertyObserver::DoCancel |
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99 // (other items were commented in a header). |
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100 // ----------------------------------------------------------------------------- |
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101 // |
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102 void CPropertyObserver::DoCancel(void) |
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103 { |
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104 iProperty.Cancel(); |
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105 } |
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106 |
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107 // ----------------------------------------------------------------------------- |
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108 // CPropertyObserver::Subscribe |
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109 // (other items were commented in a header). |
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110 // ----------------------------------------------------------------------------- |
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111 // |
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112 void CPropertyObserver::Subscribe(void) |
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113 { |
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114 iProperty.Subscribe( iStatus ); |
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115 SetActive(); |
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116 } |
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117 |
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118 // ----------------------------------------------------------------------------- |
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119 // CPropertyObserver::NotifyCurrentValue |
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120 // (other items were commented in a header). |
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121 // ----------------------------------------------------------------------------- |
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122 // |
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123 void CPropertyObserver::NotifyCurrentValue(void) |
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124 { |
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125 TInt value; |
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126 |
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127 if( iProperty.Get( iCategory, iKey, value ) == KErrNone ) |
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128 { |
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129 iHandler.HandlePropertyChange( iCategory, iKey, value ); |
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130 } |
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131 } |
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132 |
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133 |
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134 // End of File |