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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: Preview provider ECOM plugin |
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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 PREVIEWPROVIDERCRP_H |
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20 #define PREVIEWPROVIDERCRP_H |
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21 |
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22 // INCLUDES |
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23 #include <w32std.h> |
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24 #include <graphics/wsgraphicdrawerinterface.h> |
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25 #include <graphics/wsgraphicdrawer.h> |
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26 |
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27 // Number of screenshots used at the same time, |
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28 // each window group change will cause a screenshot |
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29 // to one of these, the index for the current one is |
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30 // switched after each screenshot capture. (this is needed |
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31 // to prevent overwriting screenshots before the client could |
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32 // make a copy of them) |
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33 const TInt KMaxShots = 4; |
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34 |
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35 /** |
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36 * Preview provider window server ECOM plugin class. |
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37 */ |
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38 NONSHARABLE_CLASS( CPreviewProviderCRP ) : public CWsGraphicDrawer, |
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39 public MWsEventHandler |
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40 { |
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41 public: |
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42 |
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43 /** |
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44 * Creates a new instance of the plguin. |
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45 * |
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46 * @return Created instance. |
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47 */ |
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48 static CWsGraphicDrawer* CreateL(); |
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49 |
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50 /** |
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51 * Destructor |
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52 */ |
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53 ~CPreviewProviderCRP(); |
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54 |
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55 private: |
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56 |
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57 /** |
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58 * From CWsGraphicDrawer. |
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59 * |
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60 * @param aGc |
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61 * @param aRect |
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62 * @param aData |
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63 */ |
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64 void DoDraw( MWsGc& aGc, const TRect& aRect, const TDesC8& aData ) const; |
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65 |
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66 /** |
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67 * Handles message from PreviewProviderClient. |
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68 * |
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69 * @param aData Message data. |
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70 */ |
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71 void HandleMessage( const TDesC8& aData ); |
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72 |
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73 /** |
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74 * 2nd phase constructor. |
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75 * |
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76 * @param aEnv |
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77 * @param aId |
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78 * @param aOwner |
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79 * @param aData |
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80 */ |
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81 void ConstructL( MWsGraphicDrawerEnvironment& aEnv, |
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82 const TGraphicDrawerId& aId, |
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83 MWsClient& aOwner, |
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84 const TDesC8& aData ); |
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85 |
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86 /** |
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87 * From MWsEventHandler. |
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88 * |
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89 * Observer for TWservCrEvent::EWindowGroupChanged to take the screenshot |
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90 * when application changes. |
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91 * |
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92 * @param aEvent |
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93 */ |
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94 void DoHandleEvent( const TWservCrEvent& aEvent ); |
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95 |
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96 private: |
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97 |
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98 /** |
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99 * 2nd phase constructor. |
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100 */ |
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101 void ConstructL(); |
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102 |
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103 /** |
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104 * Handles application registration. |
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105 * |
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106 * @param aWgId Window group id. |
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107 */ |
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108 void Register( TInt aWgId ); |
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109 |
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110 /** |
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111 * Handler application unregistration. |
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112 * |
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113 * @param aWgId Window group id. |
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114 */ |
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115 void Unregister( TInt aWgId ); |
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116 |
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117 /* |
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118 * Allocate resources and take screenshot |
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119 */ |
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120 void ScreenshotL(); |
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121 |
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122 /** |
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123 * Takes the screenshot. |
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124 */ |
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125 void ScreenshotL( CFbsBitmap& aBitmap ); |
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126 |
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127 /** |
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128 * Remove bitmap reference fom list |
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129 */ |
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130 void RemoveScreenshot( TInt aBitmapHandle ); |
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131 |
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132 /** |
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133 * Remove all bitmaps overflow |
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134 */ |
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135 void CheckOverflow(); |
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136 |
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137 /** |
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138 * Handles message from PreviewProviderClient. |
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139 * |
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140 * @param aData Message data. |
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141 */ |
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142 void DoHandleMessageL( const TDesC8& aData ); |
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143 |
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144 /** |
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145 * Notifies the PreviewProviderClient when screenshot is ready for copying. |
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146 */ |
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147 void ScaleCompleteL(const CFbsBitmap& aBitmap); |
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148 |
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149 /** |
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150 * Notifies the PreviewProviderClient when an application has been exited. |
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151 */ |
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152 void UnregisterComplete( TInt aWgId ); |
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153 |
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154 /** |
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155 * Uses window server front buffer to create a screenshot. |
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156 * @param aFront preallocated destination bitmap |
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157 * @param aFront Front buffer. |
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158 * @param aSrcSize Size of the source front buffer in pixels. |
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159 * @param aSrcStride Source stride. |
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160 */ |
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161 void FrontBufferScreenShot( |
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162 CFbsBitmap& aBitmap, |
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163 MWsFrontBuffer& aFront, const TSize& aSrcSize, TInt aSrcStride ); |
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164 |
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165 private: |
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166 TInt iScreen; |
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167 TInt iPrevId; |
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168 TInt iPrevReg; // to work around the problem with wgid not set when app brought |
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169 // to foreground first time |
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170 RPointerArray<CFbsBitmap> iScreenshots; |
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171 TSize iScreenshotSize; |
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172 TDisplayMode iScreenshotMode; |
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173 RArray<TInt> iWgIds; |
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174 }; |
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175 |
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176 #endif // PREVIEWPROVIDERCRP_H |
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177 |
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178 // End of file |