1 /* |
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2 * Copyright (c) 2009 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: Publish & Subscribe property change observer |
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15 * |
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16 */ |
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17 |
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18 #ifndef CIMALERTPROPERTYOBSERVER_H |
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19 #define CIMALERTPROPERTYOBSERVER_H |
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20 |
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21 // INCLUDES |
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22 #include <e32base.h> // CActive |
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23 #include <e32property.h> // RProperty |
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24 |
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25 #include "mimalertpropertynotificationobserver.h" |
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26 |
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27 |
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28 // CLASS DECLARATION |
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29 |
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30 /** |
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31 * Implementation of the Publish & Subscribe property change observer |
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32 * |
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33 * @lib MGXMediaFileAPI.lib |
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34 * @since 2.6 |
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35 */ |
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36 NONSHARABLE_CLASS(CIMAlertPropertyObserver) : public CActive |
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37 { |
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38 public: // Constructors and destructor |
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39 |
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40 /** |
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41 * Two-phased constructor. |
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42 * @param aObserver Observer to be informed when observed |
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43 * property changes |
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44 */ |
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45 static CIMAlertPropertyObserver* NewL( |
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46 MIMAlertPropertyNotificationObserver& aObserver ); |
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47 |
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48 /** |
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49 * Destructor. |
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50 */ |
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51 virtual ~CIMAlertPropertyObserver(); |
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52 |
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53 public: // New functions |
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54 |
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55 /** |
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56 * Starts observing the given key for any changes |
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57 * Notifies the observer when the property changes |
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58 * @since 2.6 |
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59 * @param aCategory, Category of the observed property |
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60 * @param aKey, Observed property |
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61 */ |
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62 void ObservePropertyChangeL( TUid aCategory, TUint aKey ); |
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63 |
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64 /** |
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65 * Stops observing the key given with call ObserverPropertyChangeL |
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66 */ |
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67 void CancelObserve( ); |
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68 |
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69 /** |
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70 * Gets the uid this observer is observing |
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71 * @return the category |
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72 */ |
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73 TUid Category(); |
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74 |
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75 /** |
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76 * Gets the uid this observer is observing |
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77 * @return the key |
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78 */ |
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79 TUint Key(); |
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80 |
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81 |
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82 protected: // Functions from base classes |
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83 |
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84 /** |
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85 * From CActive |
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86 */ |
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87 void RunL(); |
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88 |
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89 /** |
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90 * From CActive |
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91 */ |
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92 void DoCancel(); |
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93 |
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94 private: |
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95 |
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96 /** |
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97 * C++ default constructor. |
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98 */ |
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99 CIMAlertPropertyObserver( MIMAlertPropertyNotificationObserver& aObserver ); |
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100 |
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101 |
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102 private: // Data |
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103 |
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104 // Owns: Observed property |
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105 RProperty iProperty; |
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106 |
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107 // Observer to be informed when property changes |
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108 MIMAlertPropertyNotificationObserver& iObserver; |
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109 |
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110 // the category this observer is attached to |
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111 TUid iCategory; |
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112 // the key this observer is attached to |
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113 TUint iKey; |
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114 |
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115 }; |
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116 |
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117 #endif // CIMALERTPROPERTYOBSERVER_H |
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118 |
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119 // End of File |
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