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1 /* |
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2 * Copyright (c) 2005-2008 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 * Declaration of class CMMKeyBearerObserver |
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16 * |
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17 * |
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18 */ |
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19 |
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20 |
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21 #ifndef __MMKEYBEAREROBSERVERPS_H__ |
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22 #define __MMKEYBEAREROBSERVERPS_H__ |
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23 |
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24 // INCLUDE |
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25 #include <e32svr.h> |
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26 #include <e32property.h> |
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27 |
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28 // DATA TYPES |
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29 enum TObserverKeyType |
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30 { |
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31 ESideVolumeKeys = 0, |
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32 EMediaKeys, |
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33 EAccessoryVolumeKeys, |
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34 EFileTransferStatus |
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35 }; |
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36 |
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37 // CLASS DECLARATION |
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38 /** |
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39 * MCallBackReceiver |
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40 * Used to call functions of CMMKeyBearer from CMMKeyBearerObserver |
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41 * On receiving event from the P & S, CMMKeyBearerObserver calls |
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42 * this function |
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43 * @lib MMKeyBearer.dll |
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44 * @since 3.0 |
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45 */ |
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46 class MCallBackReceiver |
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47 { |
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48 public: |
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49 /** |
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50 Called when event has arrived from P&S. |
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51 @param aEnumValue: Enum value representing the key and action. |
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52 aKeyType : will indicate whether it is Volume key or Media key |
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53 */ |
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54 virtual void ReceivedKeyEvent(TInt aEnumValue, TInt aKeyType) = 0; |
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55 }; |
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56 |
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57 /** |
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58 * CMMKeyBearerObserver |
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59 * This class inplements the Active Object. There will be two instance |
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60 * of this ,one for handling Volume keys and other for Media Keys |
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61 * @lib MMKeyBearer.dll |
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62 * @since 3.0 |
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63 */ |
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64 class CMMKeyBearerObserver: public CActive |
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65 { |
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66 public: // Constructors and destructor |
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67 /** |
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68 * Creates instance of the CMMKeyBearerObserver class. |
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69 * @param aCallBack : reference of the class which implements |
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70 * MCallBackReceiver for handling call back |
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71 * functions |
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72 * @param aKeyType : Indiacates whether it is side volume key or |
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73 * media key |
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74 * @return - Instance of the CMMKeyBearerObserver class. |
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75 */ |
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76 static CMMKeyBearerObserver* NewL(MCallBackReceiver& aCallback, |
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77 TInt aKeyType); |
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78 /** |
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79 * Destructor. |
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80 */ |
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81 virtual ~CMMKeyBearerObserver(); |
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82 |
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83 public: // Base class functions - CActive |
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84 /** @see CActive::Start() */ |
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85 TInt Start(); |
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86 |
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87 /** @see CActive::Stop() */ |
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88 void Stop(); |
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89 |
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90 /** |
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91 * Gets the current value. |
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92 * @return - The current value. |
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93 */ |
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94 TInt GetValue(); |
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95 |
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96 private: // constructors |
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97 /** |
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98 * default constructor. |
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99 * @param aCallback : reference to callback class |
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100 */ |
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101 CMMKeyBearerObserver(MCallBackReceiver& aCallback); |
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102 |
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103 /** |
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104 * Two - phase construction. |
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105 */ |
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106 void ConstructL(TInt aKeyType); |
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107 |
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108 private: // Base class functions - CActive |
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109 /** @see CActive::RunL() */ |
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110 void RunL(); |
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111 /** @see CActive::DoCancel() */ |
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112 void DoCancel(); |
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113 |
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114 private: // Data |
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115 |
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116 RProperty iProperty; // For P & S |
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117 MCallBackReceiver& iCallback; |
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118 TInt iKeyType; // Vol key or media Key |
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119 }; |
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120 |
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121 #endif // __MMKEYBEAREROBSERVERPS_H__ |
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122 |
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123 // End of file |