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site/jpgraph/jpgraph_stock.php 6.07 KB
8ec98c9f   Guillaume   MAJ
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  <?php
  /*=======================================================================
   // File:        JPGRAPH_STOCK.PHP
   // Description: Stock plot extension for JpGraph
   // Created:     2003-01-27
   // Ver:         $Id: jpgraph_stock.php 1364 2009-06-24 07:07:44Z ljp $
   //
   // Copyright (c) Asial Corporation. All rights reserved.
   //========================================================================
   */
  
  //===================================================
  // CLASS StockPlot
  //===================================================
  class StockPlot extends Plot {
      protected $iTupleSize = 4;
      private $iWidth=9;
      private $iEndLines=1;
      private $iStockColor1='white',$iStockColor2='darkred',$iStockColor3='darkred';
      //---------------
      // CONSTRUCTOR
      function __construct($datay,$datax=false) {
          if( count($datay) % $this->iTupleSize ) {
              JpGraphError::RaiseL(21001,$this->iTupleSize);
              //('Data values for Stock charts must contain an even multiple of '.$this->iTupleSize.' data points.');
          }
          parent::__construct($datay,$datax);
          $this->numpoints /= $this->iTupleSize;
      }
      //---------------
      // PUBLIC METHODS
  
      function SetColor($aColor,$aColor1='white',$aColor2='darkred',$aColor3='darkred') {
          $this->color = $aColor;
          $this->iStockColor1 = $aColor1;
          $this->iStockColor2 = $aColor2;
          $this->iStockColor3 = $aColor3;
      }
  
      function SetWidth($aWidth) {
          // Make sure it's odd
          $this->iWidth = 2*floor($aWidth/2)+1;
      }
  
      function HideEndLines($aHide=true) {
          $this->iEndLines = !$aHide;
      }
  
      // Gets called before any axis are stroked
      function PreStrokeAdjust($graph) {
          if( $this->center ) {
              $a=0.5; $b=0.5;
              $this->numpoints++;
          } else {
              $a=0; $b=0;
          }
          $graph->xaxis->scale->ticks->SetXLabelOffset($a);
          $graph->SetTextScaleOff($b);
      }
  
      // Method description
      function Stroke($img,$xscale,$yscale) {
          $n=$this->numpoints;
          if( $this->center ) $n--;
          if( isset($this->coords[1]) ) {
              if( count($this->coords[1])!=$n ) {
                  JpGraphError::RaiseL(2003,count($this->coords[1]),$n);
                  // ("Number of X and Y points are not equal. Number of X-points:".count($this->coords[1])." Number of Y-points:$numpoints");
              }
              else {
                  $exist_x = true;
              }
          }
          else {
              $exist_x = false;
          }
  
          if( $exist_x ) {
              $xs=$this->coords[1][0];
          }
          else {
              $xs=0;
          }
  
          $ts = $this->iTupleSize;
          $this->csimareas = '';
          for( $i=0; $i<$n; ++$i) {
  
              //If value is NULL, then don't draw a bar at all
              if ($this->coords[0][$i*$ts] === null) continue;
  
              if( $exist_x ) {
                  $x=$this->coords[1][$i];
  				if ($x === null) continue;
              }
              else {
                  $x=$i;
              }
              $xt = $xscale->Translate($x);
  
              $neg = $this->coords[0][$i*$ts] > $this->coords[0][$i*$ts+1] ;
              $yopen  = $yscale->Translate($this->coords[0][$i*$ts]);
              $yclose = $yscale->Translate($this->coords[0][$i*$ts+1]);
              $ymin   = $yscale->Translate($this->coords[0][$i*$ts+2]);
              $ymax   = $yscale->Translate($this->coords[0][$i*$ts+3]);
  
              $dx = floor($this->iWidth/2);
              $xl = $xt - $dx;
              $xr = $xt + $dx;
  
              if( $neg ) {
                  $img->SetColor($this->iStockColor3);
              }
              else {
                  $img->SetColor($this->iStockColor1);
              }
              $img->FilledRectangle($xl,$yopen,$xr,$yclose);
              $img->SetLineWeight($this->weight);
              if( $neg ) {
                  $img->SetColor($this->iStockColor2);
              }
              else {
                  $img->SetColor($this->color);
              }
  
              $img->Rectangle($xl,$yopen,$xr,$yclose);
  
              if( $yopen < $yclose ) {
                  $ytop = $yopen ;
                  $ybottom = $yclose ;
              }
              else {
                  $ytop = $yclose ;
                  $ybottom = $yopen ;
              }
              $img->SetColor($this->color);
              $img->Line($xt,$ytop,$xt,$ymax);
              $img->Line($xt,$ybottom,$xt,$ymin);
  
              if( $this->iEndLines ) {
                  $img->Line($xl,$ymax,$xr,$ymax);
                  $img->Line($xl,$ymin,$xr,$ymin);
              }
  
              // A chance for subclasses to add things to the bar
              // for data point i
              $this->ModBox($img,$xscale,$yscale,$i,$xl,$xr,$neg);
  
              // Setup image maps
              if( !empty($this->csimtargets[$i]) ) {
                  $this->csimareas.= '<area shape="rect" coords="'.
                  round($xl).','.round($ytop).','.
                  round($xr).','.round($ybottom).'" ';
                  $this->csimareas .= ' href="'.$this->csimtargets[$i].'"';
                  if( !empty($this->csimalts[$i]) ) {
                      $sval=$this->csimalts[$i];
                      $this->csimareas .= " title=\"$sval\" alt=\"$sval\" ";
                  }
                  $this->csimareas.= "  />\n";
              }
          }
          return true;
      }
  
      // A hook for subclasses to modify the plot
      function ModBox($img,$xscale,$yscale,$i,$xl,$xr,$neg) {}
  
  } // Class
  
  //===================================================
  // CLASS BoxPlot
  //===================================================
  class BoxPlot extends StockPlot {
      private $iPColor='black',$iNColor='white';
  
      function __construct($datay,$datax=false) {
          $this->iTupleSize=5;
          parent::__construct($datay,$datax);
      }
  
      function SetMedianColor($aPos,$aNeg) {
          $this->iPColor = $aPos;
          $this->iNColor = $aNeg;
      }
  
      function ModBox($img,$xscale,$yscale,$i,$xl,$xr,$neg) {
          if( $neg )
          $img->SetColor($this->iNColor);
          else
          $img->SetColor($this->iPColor);
  
          $y = $yscale->Translate($this->coords[0][$i*5+4]);
          $img->Line($xl,$y,$xr,$y);
      }
  }
  
  /* EOF */
  ?>