<?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';
    private $iStockColor2='darkred';
    private $iStockColor3='darkred';
    //---------------
    // CONSTRUCTOR
    public function __construct($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

    public function SetColor($aColor, $aColor1='white', $aColor2='darkred', $aColor3='darkred')
    {
        $this->color = $aColor;
        $this->iStockColor1 = $aColor1;
        $this->iStockColor2 = $aColor2;
        $this->iStockColor3 = $aColor3;
    }

    public function SetWidth($aWidth)
    {
        // Make sure it's odd
        $this->iWidth = 2*floor($aWidth/2)+1;
    }

    public function HideEndLines($aHide=true)
    {
        $this->iEndLines = !$aHide;
    }

    // Gets called before any axis are stroked
    public 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
    public 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
    public function ModBox($img, $xscale, $yscale, $i, $xl, $xr, $neg)
    {
    }
} // Class

//===================================================
// CLASS BoxPlot
//===================================================
class BoxPlot extends StockPlot
{
    private $iPColor='black';
    private $iNColor='white';

    public function __construct($datay, $datax=false)
    {
        $this->iTupleSize=5;
        parent::__construct($datay, $datax);
    }

    public function SetMedianColor($aPos, $aNeg)
    {
        $this->iPColor = $aPos;
        $this->iNColor = $aNeg;
    }

    public 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 */