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1 /* |
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2 * Copyright (c) 2002-2009 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: Header file for class CUsbActiveState |
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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 #ifndef CUSBACTIVESTATE_H |
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20 #define CUSBACTIVESTATE_H |
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21 |
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22 // INCLUDE FILES |
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23 #include <e32base.h> |
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24 |
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25 // FORWARD DECLARATION |
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26 class CUsbWatcher; |
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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 * Class to handle USB state changes. |
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32 * |
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33 * @lib euser.lib usbman.lib |
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34 * @since Series 60 2.? |
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35 */ |
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36 NONSHARABLE_CLASS( CUsbActiveState ) : 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 aUsbMan Reference to usb manager. |
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43 * @param aParent Reference to UsbMediaWatcher. |
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44 * @return Pointer to created object. |
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45 */ |
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46 static CUsbActiveState* NewL( RUsb& aUsbMan, CUsbWatcher& aOwner ); |
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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 ~CUsbActiveState(); |
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52 |
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53 public: // from base class CActive |
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54 |
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55 /** |
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56 * From CActive. |
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57 * This method is called when device state has changed. |
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58 * New request is issued and device state is given to owner class. |
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59 * |
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60 * @since Series 60 2.? |
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61 */ |
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62 void RunL(); |
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63 |
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64 /** |
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65 * From CActive |
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66 * If there is outstanding request pending when Cancel() is called then |
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67 * this method must cancel request. |
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68 * |
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69 * @since Series 60 2.? |
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70 */ |
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71 void DoCancel(); |
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72 |
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73 public: // new methods |
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74 |
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75 /** |
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76 * Get the current device state |
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77 * @return the current device state |
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78 * |
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79 * @since Series 60 3.2 |
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80 */ |
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81 TUsbDeviceState CurrentState(); |
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82 |
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83 /** |
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84 * Get previous device state |
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85 * @return previous device state |
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86 * |
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87 * @since Series 60 5.1 |
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88 */ |
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89 TUsbDeviceState PreviousState(); |
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90 |
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91 |
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92 private: |
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93 |
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94 /** |
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95 * Constructor is prohibited. |
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96 * @param aUsbMan Reference to Usb manager. |
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97 * @param aParent Reference to CUsbMediaWatcher. |
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98 */ |
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99 CUsbActiveState( RUsb& aUsbMan, CUsbWatcher& aOwner ); |
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100 |
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101 /** |
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102 * C++ default constructor (no implementation provided). |
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103 */ |
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104 CUsbActiveState(); |
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105 |
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106 /** |
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107 * By default Symbian 2nd phase constructor is private. |
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108 */ |
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109 void ConstructL(); |
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110 |
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111 // Prohibit copy constructor when not deriving from CBase. |
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112 CUsbActiveState( const CUsbActiveState& ); |
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113 // Prohibit assigment operator when not deriving from CBase. |
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114 CUsbActiveState& operator=( const CUsbActiveState& ); |
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115 |
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116 private: // Data |
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117 /** |
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118 * Handle to Usb Manager |
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119 */ |
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120 RUsb iUsbMan; |
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121 |
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122 /** |
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123 * Refernce to owner class |
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124 */ |
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125 CUsbWatcher& iOwner; |
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126 |
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127 /** |
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128 * Current device state |
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129 */ |
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130 TUsbDeviceState iCurrentState; |
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131 |
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132 /** |
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133 * Previous device state |
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134 */ |
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135 TUsbDeviceState iPreviousState; |
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136 |
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137 }; |
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138 |
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139 #endif // CUSBACTIVESTATE_H |
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140 |
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141 // End of File |