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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: Implemantation for CCamLineVfGridDrawer class. |
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15 * |
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16 * Copyright © 2007 Nokia. All rights reserved. |
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17 * This material, including documentation and any related computer |
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18 * programs, is protected by copyright controlled by Nokia. All |
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19 * rights are reserved. Copying, including reproducing, storing, |
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20 * adapting or translating, any or all of this material requires the |
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21 * prior written consent of Nokia. This material also contains |
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22 * confidential information which may not be disclosed to others |
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23 * without the prior written consent of Nokia. |
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24 |
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25 * |
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26 * |
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27 */ |
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28 |
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29 |
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30 #include <gdi.h> |
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31 #include "camlinevfgriddrawer.h" |
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32 #include "camlogging.h" |
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33 |
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34 // ======== LOCAL CONSTANTS ======== |
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35 |
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36 namespace |
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37 { |
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38 const TInt KArrayGranularity = 8; |
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39 const TInt KMaxLineCount = 64; |
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40 |
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41 const TInt KPenColorRed = 255; |
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42 const TInt KPenColorGreen = 0;//255; |
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43 const TInt KPenColorBlue = 0;//255; |
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44 const TInt KPenColorAlpha = 255;//128; |
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45 const TInt KPenWidth = 2; |
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46 const TInt KPenHeight = 2; |
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47 const CGraphicsContext::TPenStyle KPenStyle = CGraphicsContext::ESolidPen; |
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48 } |
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49 |
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50 // ======== LOCAL FUNCTIONS ======== |
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51 |
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52 // ======== MEMBER FUNCTIONS ======== |
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53 |
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54 // =========================================================================== |
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55 // Public part |
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56 |
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57 // --------------------------------------------------------------------------- |
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58 // static NewL |
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59 // |
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60 // 2-phased constructor |
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61 // --------------------------------------------------------------------------- |
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62 // |
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63 CCamLineVfGridDrawer* |
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64 CCamLineVfGridDrawer::NewL() |
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65 { |
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66 CCamLineVfGridDrawer* self = new (ELeave) CCamLineVfGridDrawer; |
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67 CleanupStack::PushL( self ); |
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68 self->ConstructL(); |
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69 CleanupStack::Pop( self ); |
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70 return self; |
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71 } |
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72 |
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73 // --------------------------------------------------------------------------- |
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74 // Destructor |
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75 // --------------------------------------------------------------------------- |
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76 // |
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77 CCamLineVfGridDrawer::~CCamLineVfGridDrawer() |
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78 { |
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79 PRINT( _L("Camera => ~CCamLineVfGridDrawer") ); |
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80 iLineArray.Reset(); |
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81 iLineArray.Close(); |
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82 PRINT( _L("Camera <= ~CCamLineVfGridDrawer") ); |
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83 } |
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84 |
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85 |
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86 |
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87 // --------------------------------------------------------------------------- |
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88 // virtual InitL |
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89 // * from MCamVfGridDrawer |
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90 // |
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91 // Initialize the drawer. |
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92 // --------------------------------------------------------------------------- |
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93 // |
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94 void |
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95 CCamLineVfGridDrawer::InitL( TAny* /*aParam*/ ) |
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96 { |
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97 } |
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98 |
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99 // --------------------------------------------------------------------------- |
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100 // virtual Draw( CBitmapContext& ) |
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101 // * from MCamVfGridDrawer |
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102 // |
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103 // Draw the grid. If not set visible nothing is drawn. |
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104 // --------------------------------------------------------------------------- |
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105 // |
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106 void |
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107 CCamLineVfGridDrawer::Draw( CBitmapContext& aGc ) const |
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108 { |
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109 if( iVisible && |
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110 iLineArray.Count() > 0 ) |
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111 { |
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112 // Set drawing properties. |
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113 aGc.SetPenStyle( iPenStyle ); |
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114 aGc.SetPenSize ( iPenSize ); |
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115 aGc.SetPenColor( iPenColor ); |
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116 |
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117 // Draw the lines |
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118 for( TInt i = 0; i < iLineArray.Count(); i++ ) |
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119 { |
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120 // Top-left and bottom-right corners of the rect |
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121 // represent the line ends. |
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122 aGc.DrawLine( iLineArray[i].iTl, iLineArray[i].iBr ); |
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123 } |
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124 |
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125 // Clear any settings made to gc |
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126 aGc.Reset(); |
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127 } |
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128 else |
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129 { |
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130 // Not visible => draw nothing. |
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131 } |
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132 } |
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133 |
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134 |
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135 // --------------------------------------------------------------------------- |
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136 // virtual Draw( const TRect&, CBitmapContext& ) |
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137 // * from MCamVfGridDrawer |
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138 // |
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139 // Draw part of the grid. If not set visible nothing is drawn. |
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140 // Note: |
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141 // Only pure vertical and pure horizontal lines |
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142 // get drawn to right place if lines expand outside |
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143 // the aRect rectangle given here as parameter. |
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144 // --------------------------------------------------------------------------- |
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145 // |
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146 void |
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147 CCamLineVfGridDrawer::Draw( const TRect& aRect, |
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148 CBitmapContext& aGc ) const |
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149 { |
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150 if( iVisible && |
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151 iLineArray.Count() > 0 ) |
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152 { |
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153 // Limit the drawing to given rectangle. |
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154 // Drawing outside this rectangle has no visible effect. |
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155 aGc.SetClippingRect( aRect ); |
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156 // Make the same drawing operations as in full screen draw. |
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157 // The drawing is so simple that any optimization is |
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158 // probably more time consuming than the drawing itself. |
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159 // Draw resets the gc in the end, so clipping rect is cleared. |
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160 Draw( aGc ); |
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161 } |
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162 else |
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163 { |
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164 // Not visible => draw nothing. |
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165 } |
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166 } |
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167 |
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168 // --------------------------------------------------------------------------- |
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169 // virtual SetVisible |
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170 // * from MCamVfGridDrawer |
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171 // |
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172 // Set visibility of the grid. |
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173 // |
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174 // --------------------------------------------------------------------------- |
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175 // |
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176 void |
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177 CCamLineVfGridDrawer::SetVisible( TBool aVisible ) |
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178 { |
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179 iVisible = aVisible; |
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180 } |
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181 |
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182 |
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183 |
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184 // --------------------------------------------------------------------------- |
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185 // virtual IsVisible |
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186 // * from MCamVfGridDrawer |
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187 // |
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188 // Get visibility of the grid. |
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189 // |
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190 // --------------------------------------------------------------------------- |
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191 // |
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192 TBool |
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193 CCamLineVfGridDrawer::IsVisible() const |
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194 { |
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195 return iVisible; |
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196 } |
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197 |
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198 |
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199 // --------------------------------------------------------------------------- |
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200 // SetLinesL |
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201 // * from MCamVfGridDrawer |
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202 // |
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203 // Set the line end pair array. |
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204 // --------------------------------------------------------------------------- |
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205 // |
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206 void |
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207 CCamLineVfGridDrawer::SetLinesL( const RLineArray& aLineArray ) |
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208 { |
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209 TInt newLineCount = aLineArray.Count(); |
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210 if( newLineCount > KMaxLineCount ) |
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211 { |
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212 User::Leave( KErrArgument ); |
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213 } |
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214 |
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215 iLineArray.Reset(); |
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216 for( TInt i = 0; i < newLineCount; i++ ) |
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217 { |
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218 iLineArray.Append( aLineArray[i] ); |
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219 } |
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220 } |
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221 |
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222 |
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223 // --------------------------------------------------------------------------- |
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224 // SetLinesL |
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225 // |
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226 // Set the line end pair array by defining the count and bordered property |
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227 // of lines per horizontal and vertical axis. |
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228 // --------------------------------------------------------------------------- |
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229 // |
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230 void |
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231 CCamLineVfGridDrawer::SetLinesL( const TRect& aDrawingRect, |
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232 TInt aHorizontalLines, |
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233 TInt aVerticalLines, |
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234 TBool aBorderedGrid /* = EFalse */) |
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235 { |
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236 // ------------------------------------------------------- |
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237 // Check the max limit for lines does not exceed. |
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238 if( aHorizontalLines < 0 |
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239 || aVerticalLines < 0 |
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240 || aHorizontalLines + aVerticalLines > KMaxLineCount |
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241 ) |
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242 { |
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243 User::Leave( KErrArgument ); |
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244 } |
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245 |
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246 // ------------------------------------------------------- |
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247 // Fill the line end array |
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248 // |
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249 // The lines are evenly spaced over the draw area axis in question. |
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250 // The aBorderedGrid parameter determines whether the grid |
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251 // draws lines to the borders of draw area: |
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252 // E.g. 3 vertical lines: '[' and ']' are the draw area borders. |
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253 // aBorderedGrid: [| | |] |
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254 // !aBorderedGrid: [ | | | ] |
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255 // |
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256 // The formula for the location of i:th line when N lines |
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257 // are used along dimension D: |
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258 // - aBorderedGrid: ( i * D) / (N - 1) |
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259 // - !aBorderedGrid: ((i+1) * D) / (N + 1) |
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260 // * Divide by (N-1) needs special handling with N=1. |
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261 // * Half of pen width is subtracted from the above formula result |
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262 // to center the line to the calculated location. |
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263 // * odd area or pen width/height may cause error of 1 pixel. |
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264 TInt indexOffset = (aBorderedGrid ? 0 : 1); |
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265 TInt countOffset = (aBorderedGrid ? -1 : 1); |
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266 |
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267 // ----------------------------------- |
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268 // First horizontal lines |
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269 TInt height = aDrawingRect.Height(); |
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270 TInt leftX = aDrawingRect.iTl.iX; |
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271 TInt rightX = aDrawingRect.iBr.iX; |
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272 |
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273 TInt i = 0; |
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274 while( i < aHorizontalLines ) |
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275 { |
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276 // Max used to make sure no div-by-zero |
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277 TInt currentY = ((i+indexOffset)*height) / Max(1,aHorizontalLines+countOffset) - KPenHeight/2; |
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278 iLineArray.Append( TRect( leftX, currentY, rightX, currentY ) ); |
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279 i++; |
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280 } |
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281 |
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282 // ----------------------------------- |
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283 // Then vertical lines |
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284 TInt width = aDrawingRect.Width(); |
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285 TInt topY = aDrawingRect.iTl.iY; |
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286 TInt bottomY = aDrawingRect.iBr.iY; |
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287 |
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288 TInt j = 0; |
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289 while( j < aVerticalLines ) |
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290 { |
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291 // Max used to make sure no div-by-zero |
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292 TInt currentX = leftX + ((j+indexOffset)*width) / Max(1,aVerticalLines+countOffset) - KPenWidth/2; |
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293 iLineArray.Append( TRect( currentX, topY, currentX, bottomY ) ); |
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294 j++; |
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295 } |
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296 // ------------------------------------------------------- |
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297 } |
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298 |
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299 |
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300 // --------------------------------------------------------------------------- |
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301 // SetPenStyle |
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302 // |
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303 // Set the style of drawing pen. |
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304 // See CGraphicsContext. |
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305 // --------------------------------------------------------------------------- |
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306 // |
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307 void |
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308 CCamLineVfGridDrawer::SetPenStyle( const CGraphicsContext::TPenStyle& aPenStyle ) |
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309 { |
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310 iPenStyle = aPenStyle; |
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311 } |
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312 |
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313 |
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314 // --------------------------------------------------------------------------- |
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315 // SetPenSize |
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316 // |
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317 // Set the size of drawing pen. |
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318 // See CGraphicsContext. |
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319 // --------------------------------------------------------------------------- |
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320 // |
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321 void |
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322 CCamLineVfGridDrawer::SetPenSize( const TSize& aPenSize ) |
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323 { |
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324 iPenSize = aPenSize; |
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325 } |
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326 |
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327 // --------------------------------------------------------------------------- |
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328 // SetPenColor |
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329 // |
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330 // Set the color of drawing pen. |
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331 // See CGraphicsContext. |
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332 // --------------------------------------------------------------------------- |
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333 // |
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334 void |
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335 CCamLineVfGridDrawer::SetPenColor( const TRgb aPenColor ) |
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336 { |
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337 iPenColor = aPenColor; |
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338 } |
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339 |
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340 |
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341 // =========================================================================== |
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342 // Protected part |
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343 |
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344 // --------------------------------------------------------------------------- |
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345 // ConstructL |
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346 // |
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347 // 2nd phase constructor. |
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348 // --------------------------------------------------------------------------- |
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349 // |
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350 void |
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351 CCamLineVfGridDrawer::ConstructL() |
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352 { |
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353 // empty |
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354 } |
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355 |
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356 |
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357 |
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358 // =========================================================================== |
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359 // Private part |
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360 |
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361 // --------------------------------------------------------------------------- |
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362 // C++ constructor. |
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363 // Called in 1st phase of construction. |
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364 // --------------------------------------------------------------------------- |
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365 // |
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366 CCamLineVfGridDrawer::CCamLineVfGridDrawer() |
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367 : iLineArray( KArrayGranularity ), |
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368 iVisible( EFalse ), |
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369 iPenStyle( KPenStyle ), |
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370 iPenSize( KPenWidth, KPenHeight ), |
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371 iPenColor( KPenColorRed, KPenColorGreen, KPenColorBlue, KPenColorAlpha ) |
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372 { |
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373 // empty |
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374 } |
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375 |
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376 |
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377 // ============================== end of file ================================ |