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1 /* |
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2 * Copyright (c) 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: |
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15 * Subscribes properties from P&S |
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16 * |
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17 */ |
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18 |
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19 #ifndef XNPROPERTYSUBSCRIBER_H |
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20 #define XNPROPERTYSUBSCRIBER_H |
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21 |
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22 // System includes |
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23 #include <e32base.h> |
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24 #include <e32property.h> |
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25 |
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26 // Class declaration |
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27 /** |
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28 * Observer for property change. |
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29 */ |
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30 class MXnPropertyChangeObserver |
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31 { |
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32 public: |
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33 /** |
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34 * Property changed |
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35 * |
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36 * @since S60 5.1 |
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37 * @param aKey key value |
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38 * @param aValue property value |
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39 */ |
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40 virtual void PropertyChangedL( const TUint32 aKey, const TInt aValue ) = 0; |
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41 }; |
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42 |
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43 /** |
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44 * Subcribes property from P&S and listen property changes |
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45 * |
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46 * @ingroup group_xnlayoutengine |
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47 * @lib xn3layoutengine.lib |
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48 * @since Series 60 5.0 |
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49 */ |
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50 NONSHARABLE_CLASS( CXnPropertySubscriber ) : public CActive |
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51 { |
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52 public: |
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53 /** |
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54 * Cancel and destroy |
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55 */ |
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56 ~CXnPropertySubscriber(); |
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57 |
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58 /** |
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59 * Two-phased constructor. |
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60 * |
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61 * @param aUid P&S property category |
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62 * @param aKey P&S property key |
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63 * @param aObserver Given property change observer |
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64 */ |
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65 static CXnPropertySubscriber* NewL( |
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66 const TUid aUid, |
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67 const TUint32 aKey, |
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68 MXnPropertyChangeObserver& aObserver ); |
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69 |
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70 /** |
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71 * Two-phased constructor. |
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72 * |
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73 * @param aUid P&S property category |
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74 * @param aKey P&S property key |
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75 * @param aObserver Given property change observer |
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76 */ |
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77 static CXnPropertySubscriber* NewLC( |
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78 const TUid aUid, |
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79 const TUint32 aKey, |
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80 MXnPropertyChangeObserver& aObserver ); |
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81 |
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82 private: |
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83 /** |
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84 * C++ constructor |
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85 */ |
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86 CXnPropertySubscriber( |
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87 MXnPropertyChangeObserver& aObserver, |
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88 const TUint32 aKey ); |
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89 |
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90 /** |
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91 * Second-phase constructor |
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92 */ |
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93 void ConstructL( const TUid aUid, const TUint32 aKey ); |
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94 |
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95 private: |
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96 /** |
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97 * From CActive. |
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98 * Handle completion |
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99 */ |
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100 void RunL(); |
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101 |
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102 /** |
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103 * From CActive. |
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104 * How to cancel me |
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105 */ |
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106 void DoCancel(); |
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107 |
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108 private: |
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109 // Data |
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110 |
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111 /** |
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112 * Observer for property changes. |
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113 * Not own |
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114 */ |
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115 MXnPropertyChangeObserver& iPropertyChangeObserver; |
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116 |
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117 /** |
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118 * Property to listen |
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119 */ |
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120 RProperty iProperty; |
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121 |
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122 /** |
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123 * P&S property key |
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124 */ |
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125 TUint32 iKey; |
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126 }; |
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127 |
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128 #endif |