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1 /* |
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2 * Copyright (c) 2007 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: Class used to for resizing burst mode thumbnails* |
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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 CAMBURSTTHUMBNAILGRIDSIZER_H |
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20 #define CAMBURSTTHUMBNAILGRIDSIZER_H |
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21 |
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22 // INCLUDES |
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23 #include <bitmaptransforms.h> // For CBitmapScaler |
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24 |
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25 // CONSTANTS |
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26 |
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27 // MACROS |
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28 |
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29 // DATA TYPES |
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30 |
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31 // FUNCTION PROTOTYPES |
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32 |
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33 // FORWARD DECLARATIONS |
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34 // Helper class |
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35 class CScaleTask : public CBase |
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36 { |
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37 // ======================================================= |
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38 public: |
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39 |
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40 static CScaleTask* NewL( const CFbsBitmap& aBitmap, |
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41 const TSize& aSize, |
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42 TInt32 aInfo ); |
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43 |
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44 virtual ~CScaleTask(); |
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45 |
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46 private: |
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47 |
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48 CScaleTask( const TSize& aSize, |
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49 TInt32 aInfo ); |
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50 |
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51 void ConstructL( const CFbsBitmap& aBitmap ); |
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52 |
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53 // ------------------------------------------------------- |
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54 public: |
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55 |
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56 inline const CFbsBitmap* Bitmap() const { return iSrc; }; |
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57 inline const TSize& Size() const { return iSize; }; |
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58 inline TInt32 Info() const { return iInfo; }; |
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59 |
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60 // ======================================================= |
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61 private: |
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62 |
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63 CFbsBitmap* iSrc; //< owned |
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64 TSize iSize; |
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65 TInt32 iInfo; |
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66 |
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67 // ======================================================= |
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68 }; |
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69 |
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70 |
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71 // Interface definition for notification of when an image has been resized. |
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72 class MBitmapScaler |
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73 { |
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74 public: |
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75 /** |
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76 * Mixin interface to be implemented by any object wishing to receive |
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77 * notification of scale complete events. |
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78 * @since 2.8 |
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79 * @param aErr KErrNone if successful, on error other Epoc codes possible |
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80 * @param aBitmap The resized bitmap (called class takes ownership) |
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81 * @param aInfo Optional parameter that will be passed back when scale completes |
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82 */ |
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83 virtual void BitmapScaleCompleteL( TInt aErr, CFbsBitmap* aBitmap, TInt32 aInfo ) = 0 ; |
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84 }; |
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85 |
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86 /** |
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87 * Utility class used by the Thumbnail Grid Model for resizing/scaling bitmaps |
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88 * |
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89 * @since 2.8 |
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90 */ |
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91 class CCamThumbnailGridSizer : public CActive |
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92 { |
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93 public: // Constructors and destructor |
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94 |
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95 /** |
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96 * Two-phased constructor. |
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97 * @param aObserver The object to be notified of scaling completion |
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98 * @param aSize The default size of the bitmap to scale TO |
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99 * @return An instance of the sizer object |
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100 */ |
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101 static CCamThumbnailGridSizer* NewL( MBitmapScaler* aObserver, TSize& aSize ); |
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102 |
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103 /** |
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104 * Destructor. |
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105 */ |
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106 virtual ~CCamThumbnailGridSizer(); |
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107 |
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108 public: // New functions |
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109 |
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110 |
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111 /** |
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112 * Sets new size for the scaling |
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113 * @param aThumbSize The new size |
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114 */ |
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115 void SetSize( const TSize aThumbSize ); |
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116 |
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117 /** |
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118 * Scales from a source bitmap to a target bitmap, using the dimentions |
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119 * of the target bitmap to define the scale |
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120 * @since 2.8 |
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121 * @param aSrc Source bitmap, scaling from |
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122 */ |
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123 void StartScaleL( const CFbsBitmap& aSrc ); |
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124 |
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125 /** |
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126 * Scales from a source bitmap to a target bitmap, using the dimensions |
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127 * of the target bitmap to define the scale |
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128 * @since 2.8 |
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129 * @param aSrc Source bitmap, scaling from |
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130 * @param aSize The size of the bitmap to scale to |
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131 * @param aInfo Optional parameter that will be passed back when scale completes |
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132 */ |
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133 void StartScaleL( const CFbsBitmap& aSrc, TSize& aSize, TInt32 aInfo ); |
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134 |
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135 public: // Functions from base classes |
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136 |
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137 protected: // New functions |
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138 |
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139 protected: // Functions from base classes |
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140 |
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141 /** |
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142 * From CActive |
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143 */ |
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144 void DoCancel(); |
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145 |
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146 /** |
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147 * From CActive |
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148 */ |
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149 void RunL(); |
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150 |
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151 private: |
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152 |
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153 /** |
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154 * C++ default constructor. |
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155 * @param aObserver The object to be notified of scaling completion |
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156 * @param aSize The default size of the bitmap to scale TO |
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157 */ |
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158 CCamThumbnailGridSizer( MBitmapScaler* aObserver, TSize& aSize ); |
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159 |
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160 /** |
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161 * By default Symbian 2nd phase constructor is private. |
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162 */ |
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163 void ConstructL(); |
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164 |
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165 /** |
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166 * Allows specifying of specific sizing task to start |
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167 * @param aTask The task to begin |
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168 * @since 3.0 |
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169 */ |
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170 void StartScaleL( CScaleTask* aTask ); |
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171 |
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172 private: // Data |
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173 // Bitmap scaling object, actually does the scaling |
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174 CBitmapScaler* iScaler; |
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175 |
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176 // The object to be notified when scaling is complete. |
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177 MBitmapScaler* iObserver; |
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178 |
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179 // Temporary bitmap used while performing the scaling operation |
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180 CFbsBitmap* iTmpBitmap; |
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181 |
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182 // The size of the bitmap to scale to |
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183 TSize iThumbSize; |
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184 |
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185 // List of outstanding scaling tasks |
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186 RPointerArray <CScaleTask> iScaleTaskArray; |
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187 }; |
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188 |
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189 #endif // CAMBURSTTHUMBNAILGRIDSIZER_H |
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190 |
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191 // End of File |