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: presene avatar decoder handler |
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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 |
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20 #ifndef CSERVICEWIDGETIMAGEDECODER_H |
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21 #define CSERVICEWIDGETIMAGEDECODER_H |
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22 |
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23 #include <e32base.h> |
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24 #include <f32file.h> |
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25 |
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26 class CImageDecoder; |
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27 class CBitmapScaler; |
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28 class CFbsBitmap; |
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29 class CImageEncoder; |
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30 |
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31 /** |
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32 * decode notification class |
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33 * |
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34 * @lib servicewidgetdatapublisher.dll |
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35 * @since S60 v5.0 |
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36 */ |
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37 |
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38 class MServiceWidgetImagerDecodeObserver |
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39 { |
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40 public : |
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41 /** |
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42 * HandlerDecodeComplete notification once decode complete |
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43 * @param aBitmap decoded bitmap |
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44 * @since S60 v5.0 |
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45 * takes the ownership of aBitmap |
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46 */ |
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47 virtual void HandlerDecodeCompleteL() = 0 ; |
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48 |
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49 /** |
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50 * virtaul Destructor |
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51 * @since S60 v5.0 |
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52 */ |
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53 virtual ~MServiceWidgetImagerDecodeObserver() |
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54 { |
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55 |
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56 } |
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57 }; |
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58 |
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59 /** |
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60 * Utility class for asynchronously decoding the header thumbnail image |
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61 * |
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62 * @lib servicewidgetdatapublisher.dll |
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63 * @since S60 v5.0 |
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64 */ |
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65 |
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66 class CServiceWidgetImageDecoder : public CActive |
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67 { |
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68 enum TSWDEOperationId |
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69 { |
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70 EOpUnknown = -1, |
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71 EOpEncodeBitmap, |
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72 EOpComplete |
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73 }; |
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74 public: |
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75 /** |
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76 * Two-phased constructor |
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77 * |
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78 * @param aHeader The header control to which the bitmap is to be inserted after loading |
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79 * @param aBitmapData Descriptor containing the bitmap data stream |
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80 * @return a instance of same class |
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81 * @since S60 v5.0 |
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82 */ |
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83 static CServiceWidgetImageDecoder* NewL(MServiceWidgetImagerDecodeObserver& aObserver ); |
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84 |
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85 /** |
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86 * Destructor |
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87 * @since S60 v5.0 |
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88 */ |
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89 ~CServiceWidgetImageDecoder(); |
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90 |
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91 /** |
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92 * Starts the decoding process |
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93 * @since S60 v5.0 |
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94 * @param aBitmapData Descriptor containing the bitmap data stream |
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95 * |
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96 */ |
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97 void StartDecodingL( const TDesC8& aBitmapData ); |
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98 |
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99 /** |
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100 * From CActive |
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101 * (see details from baseclass ) |
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102 * @since S60 v5.0 |
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103 */ |
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104 void RunL(); |
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105 |
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106 /** |
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107 * From CActive |
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108 * (see details from baseclass ) |
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109 * @since S60 v5.0 |
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110 */ |
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111 void DoCancel(); |
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112 private: |
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113 /** |
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114 * First-phase (C++) constructor |
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115 * @param aHeader The header control to which the bitmap is to be inserted after loading |
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116 * @since S60 v5.0 |
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117 */ |
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118 CServiceWidgetImageDecoder(MServiceWidgetImagerDecodeObserver& aObserver); |
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119 |
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120 /** |
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121 * Second phase constructor |
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122 * @since S60 v5.0 |
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123 */ |
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124 void ConstructL(); |
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125 |
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126 /** |
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127 * helper to do encoding |
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128 * @since S60 v5.0 |
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129 */ |
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130 void StartEncodingL(); |
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131 |
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132 private : // data |
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133 |
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134 |
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135 /** |
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136 * Not Owns : notify once complete |
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137 */ |
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138 MServiceWidgetImagerDecodeObserver& iObserver; |
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139 |
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140 |
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141 /** |
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142 * Owns : The image decoder whose service is called to decode the image |
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143 */ |
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144 CImageDecoder* iImgDecoder; |
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145 |
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146 /** |
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147 * Owns : The image encoder whose service is called to decode the image |
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148 */ |
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149 CImageEncoder* iImageEncoder; |
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150 |
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151 /** |
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152 * Owns : Handle to the file server session for loading the bitmap |
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153 */ |
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154 RFs iFs; |
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155 |
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156 /** |
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157 * The bitmap. |
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158 * Owned until decoding is complete, then ownersip is transferred to header control. |
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159 */ |
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160 CFbsBitmap* iBitmap; // owned until completion |
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161 |
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162 /** |
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163 * Owns : Copy of the bitmap data stream |
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164 */ |
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165 HBufC8* iBitmapData; |
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166 |
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167 /** |
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168 * Owns : Copy of mimeType |
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169 */ |
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170 HBufC8* iMimeType; |
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171 |
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172 // next operation to perform |
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173 TSWDEOperationId iNextOperationId; |
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174 }; |
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175 |
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176 #endif /*CSERVICEWIDGETIMAGEDECODER_H*/ |
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