1 | <?php
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2 | /*=======================================================================
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3 | // File: JPGRAPH_LINE.PHP
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4 | // Description: Line plot extension for JpGraph
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5 | // Created: 2001-01-08
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6 | // Author: Johan Persson (johanp@aditus.nu)
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7 | // Ver: $Id: jpgraph_line.php,v 1.48 2003/05/28 18:39:45 aditus Exp $
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8 | //
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9 | // License: This code is released under QPL
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10 | // Copyright (C) 2001,2002 Johan Persson
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11 | //========================================================================
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12 | */
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13 |
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14 | // constants for the (filled) area
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15 | DEFINE("LP_AREA_FILLED", true);
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16 | DEFINE("LP_AREA_NOT_FILLED", false);
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17 | DEFINE("LP_AREA_BORDER",false);
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18 | DEFINE("LP_AREA_NO_BORDER",true);
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19 |
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20 | //===================================================
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21 | // CLASS LinePlot
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22 | // Description:
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23 | //===================================================
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24 | class LinePlot extends Plot{
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25 | var $filled=false;
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26 | var $fill_color='blue';
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27 | var $mark=null;
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28 | var $step_style=false, $center=false;
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29 | var $line_style=1; // Default to solid
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30 | var $filledAreas = array(); // array of arrays(with min,max,col,filled in them)
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31 | var $barcenter=false; // When we mix line and bar. Should we center the line in the bar.
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32 | var $fillFromMin = false ;
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33 |
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34 | //---------------
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35 | // CONSTRUCTOR
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36 | function LinePlot(&$datay,$datax=false) {
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37 | $this->Plot($datay,$datax);
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38 | $this->mark = new PlotMark();
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39 | }
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40 | //---------------
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41 | // PUBLIC METHODS
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42 |
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43 | // Set style, filled or open
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44 | function SetFilled($aFlag=true) {
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45 | JpGraphError::Raise('LinePlot::SetFilled() is deprecated. Use SetFillColor()');
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46 | }
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47 |
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48 | function SetBarCenter($aFlag=true) {
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49 | $this->barcenter=$aFlag;
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50 | }
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51 |
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52 | function SetStyle($aStyle) {
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53 | $this->line_style=$aStyle;
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54 | }
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55 |
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56 | function SetStepStyle($aFlag=true) {
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57 | $this->step_style = $aFlag;
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58 | }
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59 |
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60 | function SetColor($aColor) {
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61 | parent::SetColor($aColor);
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62 | }
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63 |
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64 | function SetFillFromYMin($f = true ) {
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65 | $this->fillFromMin = $f ;
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66 | }
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67 |
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68 | function SetFillColor($aColor,$aFilled=true) {
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69 | $this->fill_color=$aColor;
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70 | $this->filled=$aFilled;
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71 | }
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72 |
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73 | function Legend(&$graph) {
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74 | if( $this->legend!="" ) {
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75 | if( $this->filled ) {
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76 | $graph->legend->Add($this->legend,
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77 | $this->fill_color,$this->mark,0,
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78 | $this->legendcsimtarget,$this->legendcsimalt);
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79 | } else {
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80 | $graph->legend->Add($this->legend,
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81 | $this->color,$this->mark,$this->line_style,
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82 | $this->legendcsimtarget,$this->legendcsimalt);
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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 | function AddArea($aMin=0,$aMax=0,$aFilled=LP_AREA_NOT_FILLED,$aColor="gray9",$aBorder=LP_AREA_BORDER) {
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88 | if($aMin > $aMax) {
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89 | // swap
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90 | $tmp = $aMin;
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91 | $aMin = $aMax;
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92 | $aMax = $tmp;
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93 | }
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94 | $this->filledAreas[] = array($aMin,$aMax,$aColor,$aFilled,$aBorder);
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95 | }
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96 |
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97 | // Gets called before any axis are stroked
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98 | function PreStrokeAdjust(&$graph) {
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99 |
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100 | // If another plot type have already adjusted the
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101 | // offset we don't touch it.
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102 | // (We check for empty in case the scale is a log scale
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103 | // and hence doesn't contain any xlabel_offset)
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104 | if( empty($graph->xaxis->scale->ticks->xlabel_offset) ||
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105 | $graph->xaxis->scale->ticks->xlabel_offset == 0 ) {
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106 | if( $this->center ) {
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107 | ++$this->numpoints;
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108 | $a=0.5; $b=0.5;
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109 | } else {
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110 | $a=0; $b=0;
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111 | }
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112 | $graph->xaxis->scale->ticks->SetXLabelOffset($a);
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113 | $graph->SetTextScaleOff($b);
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114 | //$graph->xaxis->scale->ticks->SupressMinorTickMarks();
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115 | }
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116 | }
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117 |
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118 | function Stroke(&$img,&$xscale,&$yscale) {
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119 | $numpoints=count($this->coords[0]);
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120 | if( isset($this->coords[1]) ) {
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121 | if( count($this->coords[1])!=$numpoints )
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122 | JpGraphError::Raise("Number of X and Y points are not equal. Number of X-points:".count($this->coords[1])." Number of Y-points:$numpoints");
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123 | else
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124 | $exist_x = true;
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125 | }
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126 | else
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127 | $exist_x = false;
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128 |
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129 | if( $this->barcenter )
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130 | $textadj = 0.5-$xscale->text_scale_off;
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131 | else
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132 | $textadj = 0;
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133 |
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134 | // Find the first numeric data point
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135 | $startpoint=0;
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136 | while( $startpoint < $numpoints && !is_numeric($this->coords[0][$startpoint]) )
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137 | ++$startpoint;
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138 |
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139 | // Bail out if no data points
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140 | if( $startpoint == $numpoints )
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141 | return;
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142 |
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143 | if( $exist_x )
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144 | $xs=$this->coords[1][$startpoint];
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145 | else
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146 | $xs= $textadj+$startpoint;
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147 |
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148 | $img->SetStartPoint($xscale->Translate($xs),
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149 | $yscale->Translate($this->coords[0][$startpoint]));
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150 |
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151 |
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152 | if( $this->filled ) {
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153 | $cord[] = $xscale->Translate($xs);
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154 | $min = $yscale->GetMinVal();
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155 | if( $min > 0 || $this->fillFromMin )
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156 | $cord[] = $yscale->Translate($min);
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157 | else
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158 | $cord[] = $yscale->Translate(0);
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159 | }
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160 | $xt = $xscale->Translate($xs);
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161 | $yt = $yscale->Translate($this->coords[0][$startpoint]);
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162 | $cord[] = $xt;
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163 | $cord[] = $yt;
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164 | $yt_old = $yt;
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165 |
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166 | $this->value->Stroke($img,$this->coords[0][$startpoint],$xt,$yt);
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167 |
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168 | $img->SetColor($this->color);
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169 | $img->SetLineWeight($this->weight);
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170 | $img->SetLineStyle($this->line_style);
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171 | for( $pnts=$startpoint+1; $pnts<$numpoints; ++$pnts) {
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172 |
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173 | if( $exist_x ) $x=$this->coords[1][$pnts];
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174 | else $x=$pnts+$textadj;
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175 | $xt = $xscale->Translate($x);
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176 | $yt = $yscale->Translate($this->coords[0][$pnts]);
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177 |
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178 | $y=$this->coords[0][$pnts];
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179 | if( $this->step_style && is_numeric($y) ) {
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180 | $img->StyleLineTo($xt,$yt_old);
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181 | $img->StyleLineTo($xt,$yt);
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182 |
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183 | $cord[] = $xt;
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184 | $cord[] = $yt_old;
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185 |
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186 | $cord[] = $xt;
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187 | $cord[] = $yt;
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188 |
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189 | }
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190 | else {
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191 | if( is_numeric($y) || (is_string($y) && $y != "-") ) {
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192 | $tmp1=$this->coords[0][$pnts];
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193 | $tmp2=$this->coords[0][$pnts-1];
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194 | if( is_numeric($tmp1) && (is_numeric($tmp2) || $tmp2=="-" ) ) {
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195 | $img->StyleLineTo($xt,$yt);
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196 | }
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197 | else {
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198 | $img->SetStartPoint($xt,$yt);
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199 | }
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200 |
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201 | if( is_numeric($tmp1) &&
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202 | (is_numeric($tmp2) || $tmp2=="-" || ($this->filled && $tmp2=='') ) ) {
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203 | $cord[] = $xt;
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204 | $cord[] = $yt;
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205 | }
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206 | }
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207 | }
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208 | $yt_old = $yt;
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209 |
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210 | $this->StrokeDataValue($img,$this->coords[0][$pnts],$xt,$yt);
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211 |
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212 | }
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213 |
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214 | if( $this->filled ) {
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215 | $cord[] = $xt;
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216 | if( $min > 0 || $this->fillFromMin )
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217 | $cord[] = $yscale->Translate($min);
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218 | else
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219 | $cord[] = $yscale->Translate(0);
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220 | $img->SetColor($this->fill_color);
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221 | $img->FilledPolygon($cord);
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222 | $img->SetColor($this->color);
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223 | $img->Polygon($cord);
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224 | }
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225 |
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226 | if(!empty($this->filledAreas)) {
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227 |
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228 | $minY = $yscale->Translate($yscale->GetMinVal());
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229 | $factor = ($this->step_style ? 4 : 2);
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230 |
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231 | for($i = 0; $i < sizeof($this->filledAreas); ++$i) {
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232 | // go through all filled area elements ordered by insertion
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233 | // fill polygon array
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234 | $areaCoords[] = $cord[$this->filledAreas[$i][0] * $factor];
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235 | $areaCoords[] = $minY;
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236 |
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237 | $areaCoords =
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238 | array_merge($areaCoords,
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239 | array_slice($cord,
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240 | $this->filledAreas[$i][0] * $factor,
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241 | ($this->filledAreas[$i][1] - $this->filledAreas[$i][0] + ($this->step_style ? 0 : 1)) * $factor));
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242 | $areaCoords[] = $areaCoords[sizeof($areaCoords)-2]; // last x
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243 | $areaCoords[] = $minY; // last y
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244 |
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245 | if($this->filledAreas[$i][3]) {
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246 | $img->SetColor($this->filledAreas[$i][2]);
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247 | $img->FilledPolygon($areaCoords);
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248 | $img->SetColor($this->color);
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249 | }
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250 | // Check if we should draw the frame.
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251 | // If not we still re-draw the line since it might have been
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252 | // partially overwritten by the filled area and it doesn't look
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253 | // very good.
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254 | // TODO: The behaviour is undefined if the line does not have
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255 | // any line at the position of the area.
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256 | if( $this->filledAreas[$i][4] )
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257 | $img->Polygon($areaCoords);
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258 | else
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259 | $img->Polygon($cord);
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260 |
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261 | $areaCoords = array();
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262 | }
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263 | }
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264 |
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265 | if( $this->mark->type == -1 || $this->mark->show == false )
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266 | return;
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267 |
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268 | for( $pnts=0; $pnts<$numpoints; ++$pnts) {
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269 |
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270 | if( $exist_x ) $x=$this->coords[1][$pnts];
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271 | else $x=$pnts+$textadj;
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272 | $xt = $xscale->Translate($x);
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273 | $yt = $yscale->Translate($this->coords[0][$pnts]);
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274 |
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275 | if( is_numeric($this->coords[0][$pnts]) ) {
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276 | if( !empty($this->csimtargets[$pnts]) ) {
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277 | $this->mark->SetCSIMTarget($this->csimtargets[$pnts]);
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278 | $this->mark->SetCSIMAlt($this->csimalts[$pnts]);
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279 | }
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280 | if( $exist_x )
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281 | $x=$this->coords[1][$pnts];
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282 | else
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283 | $x=$pnts;
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284 | $this->mark->SetCSIMAltVal($this->coords[0][$pnts],$x);
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285 | $this->mark->Stroke($img,$xt,$yt);
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286 | $this->csimareas .= $this->mark->GetCSIMAreas();
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287 | $this->StrokeDataValue($img,$this->coords[0][$pnts],$xt,$yt);
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288 | }
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289 | }
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290 |
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291 |
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292 | }
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293 | } // Class
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294 |
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295 |
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296 | //===================================================
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297 | // CLASS AccLinePlot
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298 | // Description:
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299 | //===================================================
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300 | class AccLinePlot extends Plot {
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301 | var $plots=null,$nbrplots=0,$numpoints=0;
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302 | //---------------
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303 | // CONSTRUCTOR
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304 | function AccLinePlot($plots) {
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305 | $this->plots = $plots;
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306 | $this->nbrplots = count($plots);
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307 | $this->numpoints = $plots[0]->numpoints;
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308 | }
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309 |
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310 | //---------------
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311 | // PUBLIC METHODS
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312 | function Legend(&$graph) {
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313 | foreach( $this->plots as $p )
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314 | $p->DoLegend($graph);
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315 | }
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316 |
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317 | function Max() {
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318 | list($xmax) = $this->plots[0]->Max();
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319 | $nmax=0;
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320 | for($i=0; $i<count($this->plots); ++$i) {
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321 | $n = count($this->plots[$i]->coords[0]);
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322 | $nmax = max($nmax,$n);
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323 | list($x) = $this->plots[$i]->Max();
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324 | $xmax = Max($xmax,$x);
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325 | }
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326 | for( $i = 0; $i < $nmax; $i++ ) {
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327 | // Get y-value for line $i by adding the
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328 | // individual bars from all the plots added.
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329 | // It would be wrong to just add the
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330 | // individual plots max y-value since that
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331 | // would in most cases give to large y-value.
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332 | $y=$this->plots[0]->coords[0][$i];
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333 | for( $j = 1; $j < $this->nbrplots; $j++ ) {
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334 | $y += $this->plots[ $j ]->coords[0][$i];
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335 | }
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336 | $ymax[$i] = $y;
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337 | }
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338 | $ymax = max($ymax);
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339 | return array($xmax,$ymax);
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340 | }
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341 |
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342 | function Min() {
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343 | $nmax=0;
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344 | list($xmin,$ysetmin) = $this->plots[0]->Min();
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345 | for($i=0; $i<count($this->plots); ++$i) {
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346 | $n = count($this->plots[$i]->coords[0]);
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347 | $nmax = max($nmax,$n);
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348 | list($x,$y) = $this->plots[$i]->Min();
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349 | $xmin = Min($xmin,$x);
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350 | $ysetmin = Min($y,$ysetmin);
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351 | }
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352 | for( $i = 0; $i < $nmax; $i++ ) {
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353 | // Get y-value for line $i by adding the
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354 | // individual bars from all the plots added.
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355 | // It would be wrong to just add the
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356 | // individual plots min y-value since that
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357 | // would in most cases give to small y-value.
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358 | $y=$this->plots[0]->coords[0][$i];
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359 | for( $j = 1; $j < $this->nbrplots; $j++ ) {
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360 | $y += $this->plots[ $j ]->coords[0][$i];
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361 | }
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362 | $ymin[$i] = $y;
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363 | }
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364 | $ymin = Min($ysetmin,Min($ymin));
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365 | return array($xmin,$ymin);
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366 | }
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367 |
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368 | // Gets called before any axis are stroked
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369 | function PreStrokeAdjust(&$graph) {
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370 |
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371 | // If another plot type have already adjusted the
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372 | // offset we don't touch it.
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373 | // (We check for empty in case the scale is a log scale
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374 | // and hence doesn't contain any xlabel_offset)
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375 |
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376 | if( empty($graph->xaxis->scale->ticks->xlabel_offset) ||
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377 | $graph->xaxis->scale->ticks->xlabel_offset == 0 ) {
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378 | if( $this->center ) {
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379 | ++$this->numpoints;
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380 | $a=0.5; $b=0.5;
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381 | } else {
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382 | $a=0; $b=0;
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383 | }
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384 | $graph->xaxis->scale->ticks->SetXLabelOffset($a);
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385 | $graph->SetTextScaleOff($b);
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386 | $graph->xaxis->scale->ticks->SupressMinorTickMarks();
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387 | }
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388 |
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389 | }
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390 |
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391 | // To avoid duplicate of line drawing code here we just
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392 | // change the y-values for each plot and then restore it
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393 | // after we have made the stroke. We must do this copy since
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394 | // it wouldn't be possible to create an acc line plot
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395 | // with the same graphs, i.e AccLinePlot(array($pl,$pl,$pl));
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396 | // since this method would have a side effect.
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397 | function Stroke(&$img,&$xscale,&$yscale) {
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398 | $img->SetLineWeight($this->weight);
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399 | $this->numpoints = count($this->plots[0]->coords[0]);
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400 | // Allocate array
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401 | $coords[$this->nbrplots][$this->numpoints]=0;
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402 | for($i=0; $i<$this->numpoints; $i++) {
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403 | $coords[0][$i]=$this->plots[0]->coords[0][$i];
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404 | $accy=$coords[0][$i];
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405 | for($j=1; $j<$this->nbrplots; ++$j ) {
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406 | $coords[$j][$i] = $this->plots[$j]->coords[0][$i]+$accy;
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407 | $accy = $coords[$j][$i];
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408 | }
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409 | }
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410 | for($j=$this->nbrplots-1; $j>=0; --$j) {
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411 | $p=$this->plots[$j];
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412 | for( $i=0; $i<$this->numpoints; ++$i) {
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413 | $tmp[$i]=$p->coords[0][$i];
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414 | $p->coords[0][$i]=$coords[$j][$i];
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415 | }
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416 | $p->Stroke($img,$xscale,$yscale);
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417 | for( $i=0; $i<$this->numpoints; ++$i)
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418 | $p->coords[0][$i]=$tmp[$i];
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419 | $p->coords[0][]=$tmp;
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420 | }
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421 | }
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422 | } // Class
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423 |
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424 |
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425 | /* EOF */
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426 | ?>
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