1 | <?php |
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2 | //======================================================================= |
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3 | // File: JPGRAPH_LEGEND.INC.PHP |
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4 | // Description: Class to handle the legend box in the graph that gives |
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5 | // names on the data series. The number of rows and columns |
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6 | // in the legend are user specifyable. |
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7 | // Created: 2001-01-08 (Refactored to separate file 2008-08-01) |
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8 | // Ver: $Id: jpgraph_legend.inc.php 1926 2010-01-11 16:33:07Z ljp $ |
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9 | // |
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10 | // Copyright (c) Asial Corporation. All rights reserved. |
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11 | //======================================================================== |
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12 | |
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13 | DEFINE('_DEFAULT_LPM_SIZE',8); // Default Legend Plot Mark size |
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14 | |
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15 | |
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16 | //=================================================== |
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17 | // CLASS Legend |
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18 | // Description: Responsible for drawing the box containing |
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19 | // all the legend text for the graph |
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20 | //=================================================== |
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21 | |
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22 | class Legend { |
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23 | public $txtcol=array(); |
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24 | public $font_family=FF_DEFAULT,$font_style=FS_NORMAL,$font_size=8; // old. 12 |
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25 | private $color=array(120,120,120); // Default frame color |
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26 | private $fill_color=array(245,245,245); // Default fill color |
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27 | private $shadow=false; // Shadow around legend "box" |
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28 | private $shadow_color='darkgray'; |
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29 | private $mark_abs_hsize=_DEFAULT_LPM_SIZE,$mark_abs_vsize=_DEFAULT_LPM_SIZE; |
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30 | private $xmargin=10,$ymargin=0,$shadow_width=2; |
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31 | private $xlmargin=4; |
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32 | private $ylinespacing=5; |
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33 | |
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34 | // We need a separate margin since the baseline of the last text would coincide with the bottom otherwise |
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35 | private $ybottom_margin = 8; |
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36 | |
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37 | private $xpos=0.05, $ypos=0.15, $xabspos=-1, $yabspos=-1; |
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38 | private $halign="right", $valign="top"; |
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39 | private $font_color='black'; |
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40 | private $hide=false,$layout_n=1; |
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41 | private $weight=1,$frameweight=1; |
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42 | private $csimareas=''; |
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43 | private $reverse = false ; |
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44 | private $bkg_gradtype=-1, $bkg_gradfrom='lightgray', $bkg_gradto='gray'; |
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45 | |
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46 | //--------------- |
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47 | // CONSTRUCTOR |
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48 | function __construct() { |
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49 | // Empty |
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50 | } |
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51 | //--------------- |
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52 | // PUBLIC METHODS |
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53 | function Hide($aHide=true) { |
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54 | $this->hide=$aHide; |
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55 | } |
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56 | |
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57 | function SetHColMargin($aXMarg) { |
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58 | $this->xmargin = $aXMarg; |
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59 | } |
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60 | |
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61 | function SetVColMargin($aSpacing) { |
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62 | $this->ylinespacing = $aSpacing ; |
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63 | } |
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64 | |
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65 | function SetLeftMargin($aXMarg) { |
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66 | $this->xlmargin = $aXMarg; |
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67 | } |
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68 | |
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69 | // Synonym |
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70 | function SetLineSpacing($aSpacing) { |
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71 | $this->ylinespacing = $aSpacing ; |
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72 | } |
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73 | |
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74 | function SetShadow($aShow='gray',$aWidth=4) { |
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75 | if( is_string($aShow) ) { |
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76 | $this->shadow_color = $aShow; |
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77 | $this->shadow=true; |
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78 | } |
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79 | else { |
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80 | $this->shadow = $aShow; |
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81 | } |
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82 | $this->shadow_width = $aWidth; |
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83 | } |
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84 | |
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85 | function SetMarkAbsSize($aSize) { |
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86 | $this->mark_abs_vsize = $aSize ; |
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87 | $this->mark_abs_hsize = $aSize ; |
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88 | } |
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89 | |
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90 | function SetMarkAbsVSize($aSize) { |
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91 | $this->mark_abs_vsize = $aSize ; |
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92 | } |
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93 | |
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94 | function SetMarkAbsHSize($aSize) { |
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95 | $this->mark_abs_hsize = $aSize ; |
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96 | } |
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97 | |
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98 | function SetLineWeight($aWeight) { |
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99 | $this->weight = $aWeight; |
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100 | } |
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101 | |
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102 | function SetFrameWeight($aWeight) { |
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103 | $this->frameweight = $aWeight; |
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104 | } |
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105 | |
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106 | function SetLayout($aDirection=LEGEND_VERT) { |
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107 | $this->layout_n = $aDirection==LEGEND_VERT ? 1 : 99 ; |
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108 | } |
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109 | |
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110 | function SetColumns($aCols) { |
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111 | $this->layout_n = $aCols ; |
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112 | } |
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113 | |
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114 | function SetReverse($f=true) { |
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115 | $this->reverse = $f ; |
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116 | } |
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117 | |
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118 | // Set color on frame around box |
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119 | function SetColor($aFontColor,$aColor='black') { |
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120 | $this->font_color=$aFontColor; |
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121 | $this->color=$aColor; |
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122 | } |
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123 | |
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124 | function SetFont($aFamily,$aStyle=FS_NORMAL,$aSize=10) { |
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125 | $this->font_family = $aFamily; |
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126 | $this->font_style = $aStyle; |
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127 | $this->font_size = $aSize; |
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128 | } |
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129 | |
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130 | function SetPos($aX,$aY,$aHAlign='right',$aVAlign='top') { |
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131 | $this->Pos($aX,$aY,$aHAlign,$aVAlign); |
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132 | } |
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133 | |
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134 | function SetAbsPos($aX,$aY,$aHAlign='right',$aVAlign='top') { |
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135 | $this->xabspos=$aX; |
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136 | $this->yabspos=$aY; |
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137 | $this->halign=$aHAlign; |
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138 | $this->valign=$aVAlign; |
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139 | } |
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140 | |
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141 | function Pos($aX,$aY,$aHAlign='right',$aVAlign='top') { |
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142 | if( !($aX<1 && $aY<1) ) { |
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143 | JpGraphError::RaiseL(25120);//(" Position for legend must be given as percentage in range 0-1"); |
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144 | } |
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145 | $this->xpos=$aX; |
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146 | $this->ypos=$aY; |
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147 | $this->halign=$aHAlign; |
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148 | $this->valign=$aVAlign; |
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149 | } |
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150 | |
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151 | function SetFillColor($aColor) { |
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152 | $this->fill_color=$aColor; |
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153 | } |
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154 | |
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155 | function Clear() { |
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156 | $this->txtcol = array(); |
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157 | } |
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158 | |
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159 | function Add($aTxt,$aColor,$aPlotmark='',$aLinestyle=0,$csimtarget='',$csimalt='',$csimwintarget='') { |
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160 | $this->txtcol[]=array($aTxt,$aColor,$aPlotmark,$aLinestyle,$csimtarget,$csimalt,$csimwintarget); |
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161 | } |
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162 | |
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163 | function GetCSIMAreas() { |
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164 | return $this->csimareas; |
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165 | } |
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166 | |
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167 | function SetBackgroundGradient($aFrom='navy',$aTo='silver',$aGradType=2) { |
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168 | $this->bkg_gradtype=$aGradType; |
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169 | $this->bkg_gradfrom = $aFrom; |
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170 | $this->bkg_gradto = $aTo; |
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171 | } |
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172 | |
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173 | function HasItems() { |
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174 | return (boolean)(count($this->txtcol)); |
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175 | } |
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176 | |
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177 | function Stroke($aImg) { |
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178 | // Constant |
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179 | $fillBoxFrameWeight=1; |
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180 | |
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181 | if( $this->hide ) return; |
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182 | |
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183 | $aImg->SetFont($this->font_family,$this->font_style,$this->font_size); |
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184 | |
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185 | if( $this->reverse ) { |
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186 | $this->txtcol = array_reverse($this->txtcol); |
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187 | } |
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188 | |
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189 | $n=count($this->txtcol); |
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190 | if( $n == 0 ) return; |
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191 | |
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192 | // Find out the max width and height of each column to be able |
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193 | // to size the legend box. |
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194 | $numcolumns = ($n > $this->layout_n ? $this->layout_n : $n); |
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195 | for( $i=0; $i < $numcolumns; ++$i ) { |
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196 | $colwidth[$i] = $aImg->GetTextWidth($this->txtcol[$i][0]) + |
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197 | 2*$this->xmargin + 2*$this->mark_abs_hsize; |
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198 | $colheight[$i] = 0; |
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199 | |
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200 | } |
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201 | |
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202 | // Find our maximum height in each row |
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203 | $rows = 0 ; $rowheight[0] = 0; |
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204 | for( $i=0; $i < $n; ++$i ) { |
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205 | $h = max($this->mark_abs_vsize,$aImg->GetTextHeight($this->txtcol[$i][0]))+$this->ylinespacing; |
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206 | |
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207 | // Makes sure we always have a minimum of 1/4 (1/2 on each side) of the mark as space |
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208 | // between two vertical legend entries |
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209 | //$h = round(max($h,$this->mark_abs_vsize+$this->ymargin)); |
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210 | //echo "Textheight #$i: tetxheight=".$aImg->GetTextHeight($this->txtcol[$i][0]).', '; |
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211 | //echo "h=$h ({$this->mark_abs_vsize},{$this->ymargin})<br>"; |
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212 | if( $i % $numcolumns == 0 ) { |
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213 | $rows++; |
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214 | $rowheight[$rows-1] = 0; |
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215 | } |
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216 | $rowheight[$rows-1] = max($rowheight[$rows-1],$h)+1; |
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217 | } |
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218 | |
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219 | $abs_height = 0; |
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220 | for( $i=0; $i < $rows; ++$i ) { |
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221 | $abs_height += $rowheight[$i] ; |
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222 | } |
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223 | |
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224 | // Make sure that the height is at least as high as mark size + ymargin |
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225 | $abs_height = max($abs_height,$this->mark_abs_vsize); |
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226 | $abs_height += $this->ybottom_margin; |
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227 | |
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228 | // Find out the maximum width in each column |
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229 | for( $i=$numcolumns; $i < $n; ++$i ) { |
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230 | $colwidth[$i % $numcolumns] = max( |
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231 | $aImg->GetTextWidth($this->txtcol[$i][0])+2*$this->xmargin+2*$this->mark_abs_hsize, |
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232 | $colwidth[$i % $numcolumns]); |
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233 | } |
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234 | |
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235 | // Get the total width |
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236 | $mtw = 0; |
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237 | for( $i=0; $i < $numcolumns; ++$i ) { |
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238 | $mtw += $colwidth[$i] ; |
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239 | } |
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240 | |
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241 | // remove the last rows interpace margin (since there is no next row) |
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242 | $abs_height -= $this->ylinespacing; |
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243 | |
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244 | |
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245 | // Find out maximum width we need for legend box |
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246 | $abs_width = $mtw+$this->xlmargin+($numcolumns-1)*$this->mark_abs_hsize; |
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247 | |
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248 | if( $this->xabspos === -1 && $this->yabspos === -1 ) { |
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249 | $this->xabspos = $this->xpos*$aImg->width ; |
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250 | $this->yabspos = $this->ypos*$aImg->height ; |
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251 | } |
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252 | |
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253 | // Positioning of the legend box |
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254 | if( $this->halign == 'left' ) { |
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255 | $xp = $this->xabspos; |
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256 | } |
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257 | elseif( $this->halign == 'center' ) { |
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258 | $xp = $this->xabspos - $abs_width/2; |
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259 | } |
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260 | else { |
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261 | $xp = $aImg->width - $this->xabspos - $abs_width; |
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262 | } |
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263 | |
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264 | $yp=$this->yabspos; |
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265 | if( $this->valign == 'center' ) { |
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266 | $yp-=$abs_height/2; |
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267 | } |
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268 | elseif( $this->valign == 'bottom' ) { |
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269 | $yp-=$abs_height; |
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270 | } |
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271 | |
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272 | // Stroke legend box |
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273 | $aImg->SetColor($this->color); |
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274 | $aImg->SetLineWeight($this->frameweight); |
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275 | $aImg->SetLineStyle('solid'); |
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276 | |
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277 | if( $this->shadow ) { |
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278 | $aImg->ShadowRectangle($xp,$yp, |
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279 | $xp+$abs_width+$this->shadow_width+2, |
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280 | $yp+$abs_height+$this->shadow_width+2, |
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281 | $this->fill_color,$this->shadow_width+2,$this->shadow_color); |
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282 | } |
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283 | else { |
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284 | $aImg->SetColor($this->fill_color); |
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285 | $aImg->FilledRectangle($xp,$yp,$xp+$abs_width,$yp+$abs_height); |
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286 | $aImg->SetColor($this->color); |
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287 | $aImg->Rectangle($xp,$yp,$xp+$abs_width,$yp+$abs_height); |
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288 | } |
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289 | |
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290 | if( $this->bkg_gradtype >= 0 ) { |
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291 | $grad = new Gradient($aImg); |
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292 | $grad->FilledRectangle($xp+1, $yp+1, |
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293 | $xp+$abs_width-3, $yp+$abs_height-3, |
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294 | $this->bkg_gradfrom, $this->bkg_gradto, |
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295 | $this->bkg_gradtype); |
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296 | } |
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297 | |
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298 | // x1,y1 is the position for the legend marker + text |
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299 | // The vertical position is the baseline position for the text |
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300 | // and every marker is adjusted acording to that. |
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301 | |
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302 | // For multiline texts this get more complicated. |
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303 | |
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304 | $x1 = $xp + $this->xlmargin; |
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305 | $y1 = $yp + $rowheight[0] - $this->ylinespacing + 2 ; // The ymargin is included in rowheight |
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306 | |
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307 | // Now, y1 is the bottom vertical position of the first legend, i.e if |
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308 | // the legend has multiple lines it is the bottom line. |
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309 | |
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310 | $grad = new Gradient($aImg); |
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311 | $patternFactory = null; |
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312 | |
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313 | // Now stroke each legend in turn |
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314 | // Each plot has added the following information to the legend |
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315 | // p[0] = Legend text |
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316 | // p[1] = Color, |
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317 | // p[2] = For markers a reference to the PlotMark object |
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318 | // p[3] = For lines the line style, for gradient the negative gradient style |
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319 | // p[4] = CSIM target |
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320 | // p[5] = CSIM Alt text |
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321 | $i = 1 ; $row = 0; |
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322 | foreach($this->txtcol as $p) { |
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323 | |
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324 | // STROKE DEBUG BOX |
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325 | if( _JPG_DEBUG ) { |
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326 | $aImg->SetLineWeight(1); |
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327 | $aImg->SetColor('red'); |
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328 | $aImg->SetLineStyle('solid'); |
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329 | $aImg->Rectangle($x1,$y1,$xp+$abs_width-1,$y1-$rowheight[$row]); |
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330 | } |
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331 | |
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332 | $aImg->SetLineWeight($this->weight); |
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333 | $x1 = round($x1)+1; // We add one to not collide with the border |
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334 | $y1=round($y1); |
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335 | |
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336 | // This is the center offset up from the baseline which is |
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337 | // considered the "center" of the marks. This gets slightly complicated since |
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338 | // we need to consider if the text is a multiline paragraph or if it is only |
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339 | // a single line. The reason is that for single line the y1 corresponds to the baseline |
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340 | // and that is fine. However for a multiline paragraph there is no single baseline |
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341 | // and in that case the y1 corresponds to the lowest y for the bounding box. In that |
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342 | // case we center the mark in the middle of the paragraph |
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343 | if( !preg_match('/\n/',$p[0]) ) { |
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344 | // Single line |
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345 | $marky = ceil($y1-$this->mark_abs_vsize/2)-1; |
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346 | } else { |
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347 | // Paragraph |
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348 | $marky = $y1 - $aImg->GetTextHeight($p[0])/2; |
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349 | |
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350 | // echo "y1=$y1, p[o]={$p[0]}, marky=$marky<br>"; |
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351 | } |
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352 | |
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353 | //echo "<br>Mark #$i: marky=$marky<br>"; |
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354 | |
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355 | $x1 += $this->mark_abs_hsize; |
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356 | |
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357 | if ( !empty($p[2]) && $p[2]->GetType() > -1 ) { |
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358 | |
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359 | |
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360 | // Make a plot mark legend. This is constructed with a mark which |
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361 | // is run through with a line |
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362 | |
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363 | // First construct a bit of the line that looks exactly like the |
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364 | // line in the plot |
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365 | $aImg->SetColor($p[1]); |
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366 | if( is_string($p[3]) || $p[3]>0 ) { |
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367 | $aImg->SetLineStyle($p[3]); |
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368 | $aImg->StyleLine($x1-$this->mark_abs_hsize,$marky,$x1+$this->mark_abs_hsize,$marky); |
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369 | } |
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370 | |
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371 | // Stroke a mark using image |
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372 | if( $p[2]->GetType() == MARK_IMG ) { |
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373 | $p[2]->Stroke($aImg,$x1,$marky); |
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374 | } |
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375 | |
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376 | // Stroke a mark with the standard size |
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377 | // (As long as it is not an image mark ) |
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378 | if( $p[2]->GetType() != MARK_IMG ) { |
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379 | |
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380 | // Clear any user callbacks since we ont want them called for |
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381 | // the legend marks |
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382 | $p[2]->iFormatCallback = ''; |
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383 | $p[2]->iFormatCallback2 = ''; |
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384 | |
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385 | // Since size for circles is specified as the radius |
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386 | // this means that we must half the size to make the total |
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387 | // width behave as the other marks |
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388 | if( $p[2]->GetType() == MARK_FILLEDCIRCLE || $p[2]->GetType() == MARK_CIRCLE ) { |
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389 | $p[2]->SetSize(min($this->mark_abs_vsize,$this->mark_abs_hsize)/2); |
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390 | $p[2]->Stroke($aImg,$x1,$marky); |
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391 | } |
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392 | else { |
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393 | $p[2]->SetSize(min($this->mark_abs_vsize,$this->mark_abs_hsize)); |
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394 | $p[2]->Stroke($aImg,$x1,$marky); |
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395 | } |
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396 | } |
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397 | } |
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398 | elseif ( !empty($p[2]) && (is_string($p[3]) || $p[3]>0 ) ) { |
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399 | // Draw a styled line |
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400 | $aImg->SetColor($p[1]); |
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401 | $aImg->SetLineStyle($p[3]); |
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402 | $aImg->StyleLine($x1-$this->mark_abs_hsize,$marky,$x1+$this->mark_abs_hsize,$marky); |
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403 | $aImg->StyleLine($x1-$this->mark_abs_hsize,$marky+1,$x1+$this->mark_abs_hsize,$marky+1); |
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404 | } |
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405 | else { |
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406 | // Draw a colored box |
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407 | $color = $p[1] ; |
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408 | |
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409 | // We make boxes slightly larger to better show |
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410 | $boxsize = max($this->mark_abs_vsize,$this->mark_abs_hsize) + 2 ; |
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411 | |
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412 | $ym = $marky-ceil($boxsize/2) ; // Marker y-coordinate |
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413 | |
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414 | // We either need to plot a gradient or a |
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415 | // pattern. To differentiate we use a kludge. |
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416 | // Patterns have a p[3] value of < -100 |
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417 | if( $p[3] < -100 ) { |
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418 | // p[1][0] == iPattern, p[1][1] == iPatternColor, p[1][2] == iPatternDensity |
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419 | if( $patternFactory == null ) { |
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420 | $patternFactory = new RectPatternFactory(); |
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421 | } |
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422 | $prect = $patternFactory->Create($p[1][0],$p[1][1],1); |
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423 | $prect->SetBackground($p[1][3]); |
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424 | $prect->SetDensity($p[1][2]+1); |
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425 | $prect->SetPos(new Rectangle($x1,$ym,$boxsize,$boxsize)); |
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426 | $prect->Stroke($aImg); |
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427 | $prect=null; |
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428 | } |
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429 | else { |
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430 | if( is_array($color) && count($color)==2 ) { |
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431 | // The client want a gradient color |
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432 | $grad->FilledRectangle($x1-$boxsize/2,$ym, |
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433 | $x1+$boxsize/2,$ym+$boxsize, |
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434 | $color[0],$color[1],-$p[3]); |
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435 | } |
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436 | else { |
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437 | $aImg->SetColor($p[1]); |
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438 | $aImg->FilledRectangle($x1-$boxsize/2,$ym, $x1+$boxsize/2,$ym+$boxsize); |
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439 | } |
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440 | |
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441 | // Draw a plot frame line |
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442 | $aImg->SetColor($this->color); |
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443 | $aImg->SetLineWeight($fillBoxFrameWeight); |
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444 | $aImg->Rectangle($x1-$boxsize/2,$ym, |
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445 | $x1+$boxsize/2,$ym+$boxsize); |
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446 | } |
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447 | } |
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448 | $aImg->SetColor($this->font_color); |
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449 | $aImg->SetFont($this->font_family,$this->font_style,$this->font_size); |
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450 | $aImg->SetTextAlign('left','baseline'); |
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451 | |
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452 | $debug=false; |
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453 | $aImg->StrokeText($x1+$this->mark_abs_hsize+$this->xmargin,$y1,$p[0], |
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454 | 0,'left',$debug); |
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455 | |
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456 | // Add CSIM for Legend if defined |
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457 | if( !empty($p[4]) ) { |
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458 | |
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459 | $xs = $x1 - $this->mark_abs_hsize ; |
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460 | $ys = $y1 + 1 ; |
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461 | $xe = $x1 + $aImg->GetTextWidth($p[0]) + $this->mark_abs_hsize + $this->xmargin ; |
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462 | $ye = $y1-$rowheight[$row]+1; |
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463 | $coords = "$xs,$ys,$xe,$y1,$xe,$ye,$xs,$ye"; |
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464 | if( ! empty($p[4]) ) { |
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465 | $this->csimareas .= "<area shape=\"poly\" coords=\"$coords\" href=\"".htmlentities($p[4])."\""; |
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466 | |
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467 | if( !empty($p[6]) ) { |
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468 | $this->csimareas .= " target=\"".$p[6]."\""; |
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469 | } |
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470 | |
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471 | if( !empty($p[5]) ) { |
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472 | $tmp=sprintf($p[5],$p[0]); |
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473 | $this->csimareas .= " title=\"$tmp\" alt=\"$tmp\" "; |
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474 | } |
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475 | $this->csimareas .= " />\n"; |
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476 | } |
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477 | } |
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478 | |
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479 | if( $i >= $this->layout_n ) { |
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480 | $x1 = $xp+$this->xlmargin; |
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481 | $row++; |
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482 | if( !empty($rowheight[$row]) ) |
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483 | $y1 += $rowheight[$row]; |
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484 | $i = 1; |
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485 | } |
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486 | else { |
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487 | $x1 += $colwidth[($i-1) % $numcolumns] ; |
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488 | ++$i; |
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489 | } |
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490 | } |
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491 | } |
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492 | } // Class |
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493 | |
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494 | ?> |
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