<?php
/*=======================================================================
// File:	JPGRAPH_PIE.PHP
// Description:	Pie plot extension for JpGraph
// Created: 	2001-02-14
// Ver:		$Id: jpgraph_pie.php 1006 2008-06-09 22:32:05Z ljp $
//
// Copyright (c) Aditus Consulting. All rights reserved.
//========================================================================
*/


// Defines for PiePlot::SetLabelType()
DEFINE("PIE_VALUE_ABS", 1);
DEFINE("PIE_VALUE_PER", 0);
DEFINE("PIE_VALUE_PERCENTAGE", 0);
DEFINE("PIE_VALUE_ADJPERCENTAGE", 2);
DEFINE("PIE_VALUE_ADJPER", 2);

//===================================================
// CLASS PiePlot
// Description: Draws a pie plot
//===================================================
class PiePlot
{
    public $posx=0.5;
    public $posy=0.5;
    protected $radius=0.3;
    protected $explode_radius=array();
    protected $explode_all=false;
    protected $explode_r=20;
    protected $labels=null;
    protected $legends=null;
    protected $csimtargets=null;
    protected $csimwintargets=null;  // Array of targets for CSIM
    protected $csimareas='';		// Generated CSIM text
    protected $csimalts=null;		// ALT tags for corresponding target
    protected $data=null;
    public $title;
    protected $startangle=0;
    protected $weight=1;
    protected $color="black";
    protected $legend_margin=6;
    protected $show_labels=true;
    protected $themearr = array(
    "earth" 	=> array(136,34,40,45,46,62,63,134,74,10,120,136,141,168,180,77,209,218,346,395,89,430),
    "pastel" => array(27,415,128,59,66,79,105,110,42,147,152,230,236,240,331,337,405,38),
    "water"  => array(8,370,24,40,335,56,213,237,268,14,326,387,10,388),
    "sand"   => array(27,168,34,170,19,50,65,72,131,209,46,393));
    protected $theme="earth";
    protected $setslicecolors=array();
    protected $labeltype=0; // Default to percentage
    protected $pie_border=true;
    protected $pie_interior_border=true;
    public $value;
    protected $ishadowcolor='';
    protected $ishadowdrop=4;
    protected $ilabelposadj=1;
    protected $legendcsimtargets = array();
    protected $legendcsimwintargets = array();
    protected $legendcsimalts = array();
    protected $adjusted_data = array();
    public $guideline = null;
    protected $guidelinemargin=10;
    protected $iShowGuideLineForSingle = false;
    protected $iGuideLineCurve = false;
    protected $iGuideVFactor=1.4;
    protected $iGuideLineRFactor=0.8;
    protected $la = array(); // Holds the exact angle for each label
    
    //---------------
    // CONSTRUCTOR
    public function PiePlot($data)
    {
        $this->data = array_reverse($data);
        $this->title = new Text("");
        $this->title->SetFont(FF_FONT1, FS_BOLD);
        $this->value = new DisplayValue();
        $this->value->Show();
        $this->value->SetFormat('%.1f%%');
        $this->guideline = new LineProperty();
    }

    //---------------
    // PUBLIC METHODS
    public function SetCenter($x, $y=0.5)
    {
        $this->posx = $x;
        $this->posy = $y;
    }

    // Enable guideline and set drwaing policy
    public function SetGuideLines($aFlg=true, $aCurved=true, $aAlways=false)
    {
        $this->guideline->Show($aFlg);
        $this->iShowGuideLineForSingle = $aAlways;
        $this->iGuideLineCurve = $aCurved;
    }

    // Adjuste the distance between labels and labels and pie
    public function SetGuideLinesAdjust($aVFactor, $aRFactor=0.8)
    {
        $this->iGuideVFactor=$aVFactor;
        $this->iGuideLineRFactor=$aRFactor;
    }

    public function SetColor($aColor)
    {
        $this->color = $aColor;
    }
    
    public function SetSliceColors($aColors)
    {
        $this->setslicecolors = $aColors;
    }
    
    public function SetShadow($aColor='darkgray', $aDropWidth=4)
    {
        $this->ishadowcolor = $aColor;
        $this->ishadowdrop = $aDropWidth;
    }

    public function SetCSIMTargets($aTargets, $aAlts='', $aWinTargets='')
    {
        $this->csimtargets=array_reverse($aTargets);
        if (is_array($aWinTargets)) {
            $this->csimwintargets=array_reverse($aWinTargets);
        }
        if (is_array($aAlts)) {
            $this->csimalts=array_reverse($aAlts);
        }
    }
    
    public function GetCSIMareas()
    {
        return $this->csimareas;
    }

    public function AddSliceToCSIM($i, $xc, $yc, $radius, $sa, $ea)
    {
        //Slice number, ellipse centre (x,y), height, width, start angle, end angle
        while ($sa > 2*M_PI) {
            $sa = $sa - 2*M_PI;
        }
        while ($ea > 2*M_PI) {
            $ea = $ea - 2*M_PI;
        }

        $sa = 2*M_PI - $sa;
        $ea = 2*M_PI - $ea;

        // Special case when we have only one slice since then both start and end
        // angle will be == 0
        if (abs($sa - $ea) < 0.0001) {
            $sa=2*M_PI;
            $ea=0;
        }

        //add coordinates of the centre to the map
        $xc = floor($xc);
        $yc=floor($yc);
        $coords = "$xc, $yc";

        //add coordinates of the first point on the arc to the map
        $xp = floor(($radius*cos($ea))+$xc);
        $yp = floor($yc-$radius*sin($ea));
        $coords.= ", $xp, $yp";
    
        //add coordinates every 0.2 radians
        $a=$ea+0.2;

        // If we cross the 360-limit with a slice we need to handle
        // the fact that end angle is smaller than start
        if ($sa < $ea) {
            while ($a <= 2*M_PI) {
                $xp = floor($radius*cos($a)+$xc);
                $yp = floor($yc-$radius*sin($a));
                $coords.= ", $xp, $yp";
                $a += 0.2;
            }
            $a -= 2*M_PI;
        }


        while ($a < $sa) {
            $xp = floor($radius*cos($a)+$xc);
            $yp = floor($yc-$radius*sin($a));
            $coords.= ", $xp, $yp";
            $a += 0.2;
        }
        
        //Add the last point on the arc
        $xp = floor($radius*cos($sa)+$xc);
        $yp = floor($yc-$radius*sin($sa));
        $coords.= ", $xp, $yp";
        if (!empty($this->csimtargets[$i])) {
            $this->csimareas .= "<area shape=\"poly\" coords=\"$coords\" href=\"".$this->csimtargets[$i]."\"";
            $tmp="";
            if (!empty($this->csimwintargets[$i])) {
                $this->csimareas .= " target=\"".$this->csimwintargets[$i]."\" ";
            }
            if (!empty($this->csimalts[$i])) {
                $tmp=sprintf($this->csimalts[$i], $this->data[$i]);
                $this->csimareas .= " title=\"$tmp\" alt=\"$tmp\" ";
            }
            $this->csimareas .= " />\n";
        }
    }

    
    public function SetTheme($aTheme)
    {
        if (in_array($aTheme, array_keys($this->themearr))) {
            $this->theme = $aTheme;
        } else {
            JpGraphError::RaiseL(15001, $aTheme);
        }//("PiePLot::SetTheme() Unknown theme: $aTheme");
    }
    
    public function ExplodeSlice($e, $radius=20)
    {
        if (! is_integer($e)) {
            JpGraphError::RaiseL(15002);
        }//('Argument to PiePlot::ExplodeSlice() must be an integer');
        $this->explode_radius[$e]=$radius;
    }

    public function ExplodeAll($radius=20)
    {
        $this->explode_all=true;
        $this->explode_r = $radius;
    }

    public function Explode($aExplodeArr)
    {
        if (!is_array($aExplodeArr)) {
            JpGraphError::RaiseL(15003);
            //("Argument to PiePlot::Explode() must be an array with integer distances.");
        }
        $this->explode_radius = $aExplodeArr;
    }

    public function SetStartAngle($aStart)
    {
        if ($aStart < 0 || $aStart > 360) {
            JpGraphError::RaiseL(15004);//('Slice start angle must be between 0 and 360 degrees.');
        }
        $this->startangle = 360-$aStart;
        $this->startangle *= M_PI/180;
    }
    
    public function SetFont($family, $style=FS_NORMAL, $size=10)
    {
        JpGraphError::RaiseL(15005);//('PiePlot::SetFont() is deprecated. Use PiePlot->value->SetFont() instead.');
    }
    
    // Size in percentage
    public function SetSize($aSize)
    {
        if (($aSize>0 && $aSize<=0.5) || ($aSize>10 && $aSize<1000)) {
            $this->radius = $aSize;
        } else {
            JpGraphError::RaiseL(15006);
        }
        //("PiePlot::SetSize() Radius for pie must either be specified as a fraction [0, 0.5] of the size of the image or as an absolute size in pixels  in the range [10, 1000]");
    }
    
    public function SetFontColor($aColor)
    {
        JpGraphError::RaiseL(15007);
        //('PiePlot::SetFontColor() is deprecated. Use PiePlot->value->SetColor() instead.');
    }
    
    // Set label arrays
    public function SetLegends($aLegend)
    {
        $this->legends = $aLegend;
    }

    // Set text labels for slices
    public function SetLabels($aLabels, $aLblPosAdj="auto")
    {
        $this->labels = array_reverse($aLabels);
        $this->ilabelposadj=$aLblPosAdj;
    }

    public function SetLabelPos($aLblPosAdj)
    {
        $this->ilabelposadj=$aLblPosAdj;
    }
    
    // Should we display actual value or percentage?
    public function SetLabelType($t)
    {
        if ($t < 0 || $t > 2) {
            JpGraphError::RaiseL(15008, $t);
        }
        //("PiePlot::SetLabelType() Type for pie plots must be 0 or 1 (not $t).");
        $this->labeltype=$t;
    }

    // Deprecated.
    public function SetValueType($aType)
    {
        $this->SetLabelType($aType);
    }

    // Should the circle around a pie plot be displayed
    public function ShowBorder($exterior=true, $interior=true)
    {
        $this->pie_border = $exterior;
        $this->pie_interior_border = $interior;
    }
    
    // Setup the legends
    public function Legend($graph)
    {
        $colors = array_keys($graph->img->rgb->rgb_table);
        sort($colors);
        $ta=$this->themearr[$this->theme];
        $n = count($this->data);

        if ($this->setslicecolors==null) {
            $numcolors=count($ta);
            if (class_exists('PiePlot3D', false) && ($this instanceof PiePlot3D)) {
                $ta = array_reverse(array_slice($ta, 0, $n));
            }
        } else {
            $this->setslicecolors = array_slice($this->setslicecolors, 0, $n);
            $numcolors=count($this->setslicecolors);
            if ($graph->pieaa && !($this instanceof PiePlot3D)) {
                $this->setslicecolors = array_reverse($this->setslicecolors);
            }
        }
        
        $sum=0;
        for ($i=0; $i < $n; ++$i) {
            $sum += $this->data[$i];
        }

        // Bail out with error if the sum is 0
        if ($sum==0) {
            JpGraphError::RaiseL(15009);
        }//("Illegal pie plot. Sum of all data is zero for Pie!");

        // Make sure we don't plot more values than data points
        // (in case the user added more legends than data points)
        $n = min(count($this->legends), count($this->data));
        if ($this->legends != "") {
            $this->legends = array_reverse(array_slice($this->legends, 0, $n));
        }
        for ($i=$n-1; $i >= 0; --$i) {
            $l = $this->legends[$i];
            // Replace possible format with actual values
            if (count($this->csimalts) > $i) {
                $fmt = $this->csimalts[$i];
            } else {
                $fmt = "%d"; // Deafult Alt if no other has been specified
            }
            if ($this->labeltype==0) {
                $l = sprintf($l, 100*$this->data[$i]/$sum);
                $alt = sprintf($fmt, $this->data[$i]);
            } elseif ($this->labeltype == 1) {
                $l = sprintf($l, $this->data[$i]);
                $alt = sprintf($fmt, $this->data[$i]);
            } else {
                $l = sprintf($l, $this->adjusted_data[$i]);
                $alt = sprintf($fmt, $this->adjusted_data[$i]);
            }

            if (empty($this->csimwintargets[$i])) {
                $wintarg = '';
            } else {
                $wintarg = $this->csimwintargets[$i];
            }

            if ($this->setslicecolors==null) {
                $graph->legend->Add($l, $colors[$ta[$i%$numcolors]], "", 0, $this->csimtargets[$i], $alt, $wintarg);
            } else {
                $graph->legend->Add($l, $this->setslicecolors[$i%$numcolors], "", 0, $this->csimtargets[$i], $alt, $wintarg);
            }
        }
    }
    
    // Adjust the rounded percetage value so that the sum of
    // of the pie slices are always 100%
    // Using the Hare/Niemeyer method
    public function AdjPercentage($aData, $aPrec=0)
    {
        $mul=100;
        if ($aPrec > 0 && $aPrec < 3) {
            if ($aPrec == 1) {
                $mul=1000;
            } else {
                $mul=10000;
            }
        }
    
        $tmp = array();
        $result = array();
        $quote_sum=0;
        $n = count($aData) ;
        for ($i=0, $sum=0; $i < $n; ++$i) {
            $sum+=$aData[$i];
        }
        foreach ($aData as $index => $value) {
            $tmp_percentage=$value/$sum*$mul;
            $result[$index]=floor($tmp_percentage);
            $tmp[$index]=$tmp_percentage-$result[$index];
            $quote_sum+=$result[$index];
        }
        if ($quote_sum == $mul) {
            if ($mul > 100) {
                $tmp = $mul / 100;
                for ($i=0; $i < $n; ++$i) {
                    $result[$i] /= $tmp ;
                }
            }
            return $result;
        }
        arsort($tmp, SORT_NUMERIC);
        reset($tmp);
        for ($i=0; $i < $mul-$quote_sum; $i++) {
            $result[key($tmp)]++;
            next($tmp);
        }
        if ($mul > 100) {
            $tmp = $mul / 100;
            for ($i=0; $i < $n; ++$i) {
                $result[$i] /= $tmp ;
            }
        }
        return $result;
    }


    public function Stroke($img, $aaoption=0)
    {
        // aaoption is used to handle antialias
        // aaoption == 0 a normal pie
        // aaoption == 1 just the body
        // aaoption == 2 just the values

        // Explode scaling. If anti anti alias we scale the image
        // twice and we also need to scale the exploding distance
        $expscale = $aaoption === 1 ? 2 : 1;

        if ($this->labeltype == 2) {
            // Adjust the data so that it will add up to 100%
            $this->adjusted_data = $this->AdjPercentage($this->data);
        }

        $colors = array_keys($img->rgb->rgb_table);
        sort($colors);
        $ta=$this->themearr[$this->theme];
        $n = count($this->data);
    
        if ($this->setslicecolors==null) {
            $numcolors=count($ta);
        } else {
            // We need to create an array of colors as long as the data
            // since we need to reverse it to get the colors in the right order
            $numcolors=count($this->setslicecolors);
            $i = 2*$numcolors;
            while ($n > $i) {
                $this->setslicecolors = array_merge($this->setslicecolors, $this->setslicecolors);
                $i += $n;
            }
            $tt = array_slice($this->setslicecolors, 0, $n % $numcolors);
            $this->setslicecolors = array_merge($this->setslicecolors, $tt);
            $this->setslicecolors = array_reverse($this->setslicecolors);
        }

        // Draw the slices
        $sum=0;
        for ($i=0; $i < $n; ++$i) {
            $sum += $this->data[$i];
        }
    
        // Bail out with error if the sum is 0
        if ($sum==0) {
            JpGraphError::RaiseL(15009);
        }//("Sum of all data is 0 for Pie.");
    
        // Set up the pie-circle
        if ($this->radius <= 1) {
            $radius = floor($this->radius*min($img->width, $img->height));
        } else {
            $radius = $aaoption === 1 ? $this->radius*2 : $this->radius;
        }

        if ($this->posx <= 1 && $this->posx > 0) {
            $xc = round($this->posx*$img->width);
        } else {
            $xc = $this->posx ;
        }
    
        if ($this->posy <= 1 && $this->posy > 0) {
            $yc = round($this->posy*$img->height);
        } else {
            $yc = $this->posy ;
        }
        
        $n = count($this->data);

        if ($this->explode_all) {
            for ($i=0; $i < $n; ++$i) {
                $this->explode_radius[$i]=$this->explode_r;
            }
        }

        // If we have a shadow and not just drawing the labels
        if ($this->ishadowcolor != "" && $aaoption !== 2) {
            $accsum=0;
            $angle2 = $this->startangle;
            $img->SetColor($this->ishadowcolor);
            for ($i=0; $sum > 0 && $i < $n; ++$i) {
                $j = $n-$i-1;
                $d = $this->data[$i];
                $angle1 = $angle2;
                $accsum += $d;
                $angle2 = $this->startangle+2*M_PI*$accsum/$sum;
                if (empty($this->explode_radius[$j])) {
                    $this->explode_radius[$j]=0;
                }

                if ($d < 0.00001) {
                    continue;
                }

                $la = 2*M_PI - (abs($angle2-$angle1)/2.0+$angle1);

                $xcm = $xc + $this->explode_radius[$j]*cos($la)*$expscale;
                $ycm = $yc - $this->explode_radius[$j]*sin($la)*$expscale;
        
                $xcm += $this->ishadowdrop*$expscale;
                $ycm += $this->ishadowdrop*$expscale;

                $_sa = round($angle1*180/M_PI);
                $_ea = round($angle2*180/M_PI);

                // The CakeSlice method draws a full circle in case of start angle = end angle
                // for pie slices we don't want this behaviour unless we only have one
                // slice in the pie in case it is the wanted behaviour
                if ($_ea-$_sa > 0.1 || $n==1) {
                    $img->CakeSlice(
                        $xcm,
                        $ycm,
                        $radius-1,
                        $radius-1,
                        $angle1*180/M_PI,
                        $angle2*180/M_PI,
                        $slicecolor,
                        $arccolor
                    );
                }
            }
        }

        //--------------------------------------------------------------------------------
        // This is the main loop to draw each cake slice
        //--------------------------------------------------------------------------------

        // Set up the accumulated sum, start angle for first slice and border color
        $accsum=0;
        $angle2 = $this->startangle;
        $img->SetColor($this->color);

        // Loop though all the slices if there is a pie to draw (sum>0)
        // There are n slices in total
        for ($i=0; $sum>0 && $i < $n; ++$i) {

        // $j is the actual index used for the slice
            $j = $n-$i-1;

            // Make sure we havea  valid distance to explode the slice
            if (empty($this->explode_radius[$j])) {
                $this->explode_radius[$j]=0;
            }

            // The actual numeric value for the slice
            $d = $this->data[$i];

            $angle1 = $angle2;

            // Accumlate the sum
            $accsum += $d;

            // The new angle when we add the "size" of this slice
            // angle1 is then the start and angle2 the end of this slice
            $angle2 = $this->NormAngle($this->startangle+2*M_PI*$accsum/$sum);

            // We avoid some trouble by not allowing end angle to be 0, in that case
            // we translate to 360


            // la is used to hold the label angle, which is centered on the slice
            if ($angle2 < 0.0001 && $angle1 > 0.0001) {
                $this->la[$i] = 2*M_PI - (abs(2*M_PI-$angle1)/2.0+$angle1);
            } else {
                $this->la[$i] = 2*M_PI - (abs($angle2-$angle1)/2.0+$angle1);
            }

            $_sa = round($angle1*180/M_PI);
            $_ea = round($angle2*180/M_PI);
            $_la = round($this->la[$i]*180/M_PI);
            //echo "ang1=$_sa , ang2=$_ea - la=$_la<br>";

            // Too avoid rounding problems we skip the slice if it is too small
            if ($d < 0.00001) {
                continue;
            }

            // If the user has specified an array of colors for each slice then use
            // that a color otherwise use the theme array (ta) of colors
            if ($this->setslicecolors==null) {
                $slicecolor=$colors[$ta[$i%$numcolors]];
            } else {
                $slicecolor=$this->setslicecolors[$i%$numcolors];
            }
        
            // If we have enabled antialias then we don't draw any border so
            // make the bordedr color the same as the slice color
            if ($this->pie_interior_border && $aaoption===0) {
                $img->SetColor($this->color);
            } else {
                $img->SetColor($slicecolor);
            }
            $arccolor = $this->pie_border && $aaoption===0 ? $this->color : "";

            // Calculate the x,y coordinates for the base of this slice taking
            // the exploded distance into account. Here we use the mid angle as the
            // ray of extension and we have the mid angle handy as it is also the
            // label angle
            $xcm = $xc + $this->explode_radius[$j]*cos($this->la[$i])*$expscale;
            $ycm = $yc - $this->explode_radius[$j]*sin($this->la[$i])*$expscale;

            // If we are not just drawing the labels then draw this cake slice
            if ($aaoption !== 2) {
                $_sa = round($angle1*180/M_PI);
                $_ea = round($angle2*180/M_PI);
                $_la = round($this->la[$i]*180/M_PI);
                //echo "[$i] sa=$_sa, ea=$_ea, la[$i]=$_la, (color=$slicecolor)<br>";
        

                // The CakeSlice method draws a full circle in case of start angle = end angle
                // for pie slices we don't want this behaviour unless we only have one
                // slice in the pie in case it is the wanted behaviour
                if (abs($_ea-$_sa) > 0.1 || $n==1) {
                    $img->CakeSlice($xcm, $ycm, $radius-1, $radius-1, $_sa, $_ea, $slicecolor, $arccolor);
                }
            }

            // If the CSIM is used then make sure we register a CSIM area for this slice as well
            if ($this->csimtargets && $aaoption !== 1) {
                $this->AddSliceToCSIM($i, $xcm, $ycm, $radius, $angle1, $angle2);
            }
        }

        // Format the titles for each slice
        if ($aaoption !== 2) {
            for ($i=0; $i < $n; ++$i) {
                if ($this->labeltype==0) {
                    if ($sum != 0) {
                        $l = 100.0*$this->data[$i]/$sum;
                    } else {
                        $l = 0.0;
                    }
                } elseif ($this->labeltype==1) {
                    $l = $this->data[$i]*1.0;
                } else {
                    $l = $this->adjusted_data[$i];
                }
                if (isset($this->labels[$i]) && is_string($this->labels[$i])) {
                    $this->labels[$i]=sprintf($this->labels[$i], $l);
                } else {
                    $this->labels[$i]=$l;
                }
            }
        }

        if ($this->value->show && $aaoption !== 1) {
            $this->StrokeAllLabels($img, $xc, $yc, $radius);
        }

        // Adjust title position
        if ($aaoption !== 1) {
            $this->title->SetPos(
                $xc,
                $yc-$this->title->GetFontHeight($img)-$radius-$this->title->margin,
                "center",
                "bottom"
            );
            $this->title->Stroke($img);
        }
    }

    //---------------
    // PRIVATE METHODS

    public function NormAngle($a)
    {
        while ($a < 0) {
            $a += 2*M_PI;
        }
        while ($a > 2*M_PI) {
            $a -= 2*M_PI;
        }
        return $a;
    }

    public function Quadrant($a)
    {
        $a=$this->NormAngle($a);
        if ($a > 0 && $a <= M_PI/2) {
            return 0;
        }
        if ($a > M_PI/2 && $a <= M_PI) {
            return 1;
        }
        if ($a > M_PI && $a <= 1.5*M_PI) {
            return 2;
        }
        if ($a > 1.5*M_PI) {
            return 3;
        }
    }

    public function StrokeGuideLabels($img, $xc, $yc, $radius)
    {
        $n = count($this->labels);

        //-----------------------------------------------------------------------
    // Step 1 of the algorithm is to construct a number of clusters
    // a cluster is defined as all slices within the same quadrant (almost)
    // that has an angular distance less than the treshold
    //-----------------------------------------------------------------------
    $tresh_hold=25 * M_PI/180; // 25 degrees difference to be in a cluster
    $incluster=false;	// flag if we are currently in a cluster or not
    $clusters = array();	// array of clusters
    $cidx=-1;		// running cluster index

    // Go through all the labels and construct a number of clusters
        for ($i=0; $i < $n-1; ++$i) {
            // Calc the angle distance between two consecutive slices
            $a1=$this->la[$i];
            $a2=$this->la[$i+1];
            $q1 = $this->Quadrant($a1);
            $q2 = $this->Quadrant($a2);
            $diff = abs($a1-$a2);
            if ($diff < $tresh_hold) {
                if ($incluster) {
                    $clusters[$cidx][1]++;
                    // Each cluster can only cover one quadrant
                    // Do we cross a quadrant ( and must break the cluster)
                    if ($q1 !=  $q2) {
                        // If we cross a quadrant boundary we normally start a
                        // new cluster. However we need to take the 12'a clock
                        // and 6'a clock positions into a special consideration.
                        // Case 1: WE go from q=1 to q=2 if the last slice on
                        // the cluster for q=1 is close to 12'a clock and the
                        // first slice in q=0 is small we extend the previous
                        // cluster
                        if ($q1 == 1 && $q2 == 0 && $a2 > (90-15)*M_PI/180) {
                            if ($i < $n-2) {
                                $a3 = $this->la[$i+2];
                                // If there isn't a cluster coming up with the next-next slice
                                // we extend the previous cluster to cover this slice as well
                                if (abs($a3-$a2) >= $tresh_hold) {
                                    $clusters[$cidx][1]++;
                                    $i++;
                                }
                            }
                        } elseif ($q1 == 3 && $q2 == 2 && $a2 > (270-15)*M_PI/180) {
                            if ($i < $n-2) {
                                $a3 = $this->la[$i+2];
                                // If there isn't a cluster coming up with the next-next slice
                                // we extend the previous cluster to cover this slice as well
                                if (abs($a3-$a2) >= $tresh_hold) {
                                    $clusters[$cidx][1]++;
                                    $i++;
                                }
                            }
                        }

                        if ($q1==2 && $q2==1 && $a2 > (180-15)*M_PI/180) {
                            $clusters[$cidx][1]++;
                            $i++;
                        }
            
                        $incluster = false;
                    }
                } elseif ($q1 == $q2) {
                    $incluster = true;
                    // Now we have a special case for quadrant 0. If we previously
                    // have a cluster of one in quadrant 0 we just extend that
                    // cluster. If we don't do this then we risk that the label
                    // for the cluster of one will cross the guide-line
                    if ($q1 == 0 && $cidx > -1 &&
            $clusters[$cidx][1] == 1 &&
            $this->Quadrant($this->la[$clusters[$cidx][0]]) == 0) {
                        $clusters[$cidx][1]++;
                    } else {
                        $cidx++;
                        $clusters[$cidx][0] = $i;
                        $clusters[$cidx][1] = 1;
                    }
                } else {
                    // Create a "cluster" of one since we are just crossing
                    // a quadrant
                    $cidx++;
                    $clusters[$cidx][0] = $i;
                    $clusters[$cidx][1] = 1;
                }
            } else {
                if ($incluster) {
                    // Add the last slice
                    $clusters[$cidx][1]++;
                    $incluster = false;
                } else { // Create a "cluster" of one
                    $cidx++;
                    $clusters[$cidx][0] = $i;
                    $clusters[$cidx][1] = 1;
                }
            }
        }
        // Handle the very last slice
        if ($incluster) {
            $clusters[$cidx][1]++;
        } else { // Create a "cluster" of one
            $cidx++;
            $clusters[$cidx][0] = $i;
            $clusters[$cidx][1] = 1;
        }

        /*
        if( true ) {
            // Debug printout in labels
            for( $i=0; $i <= $cidx; ++$i ) {
            for( $j=0; $j < $clusters[$i][1]; ++$j ) {
                $a = $this->la[$clusters[$i][0]+$j];
                $aa = round($a*180/M_PI);
                $q = $this->Quadrant($a);
                $this->labels[$clusters[$i][0]+$j]="[$q:$aa] $i:$j";
            }
            }
        }
        */

        //-----------------------------------------------------------------------
        // Step 2 of the algorithm is use the clusters and draw the labels
        // and guidelines
        //-----------------------------------------------------------------------

        // We use the font height as the base factor for how far we need to
        // spread the labels in the Y-direction.
        $this->value->ApplyFont($img);
        $fh = $img->GetFontHeight();
        $origvstep=$fh*$this->iGuideVFactor;
        $this->value->SetMargin(0);

        // Number of clusters found
        $nc = count($clusters);

        // Walk through all the clusters
        for ($i=0; $i < $nc; ++$i) {

        // Start angle and number of slices in this cluster
            $csize = $clusters[$i][1];
            $a = $this->la[$clusters[$i][0]];
            $q = $this->Quadrant($a);

            // Now set up the start and end conditions to make sure that
            // in each cluster we walk through the all the slices starting with the slice
            // closest to the equator. Since all slices are numbered clockwise from "3'a clock"
            // we have different conditions depending on in which quadrant the slice lies within.
            if ($q == 0) {
                $start = $csize-1;
                $idx = $start;
                $step = -1;
                $vstep = -$origvstep;
            } elseif ($q == 1) {
                $start = 0;
                $idx = $start;
                $step = 1;
                $vstep = -$origvstep;
            } elseif ($q == 2) {
                $start = $csize-1;
                $idx = $start;
                $step = -1;
                $vstep = $origvstep;
            } elseif ($q == 3) {
                $start = 0;
                $idx = $start;
                $step = 1;
                $vstep = $origvstep;
            }

            // Walk through all slices within this cluster
            for ($j=0; $j < $csize; ++$j) {
                // Now adjust the position of the labels in each cluster starting
                // with the slice that is closest to the equator of the pie
                $a = $this->la[$clusters[$i][0]+$idx];
            
                // Guide line start in the center of the arc of the slice
                $r = $radius+$this->explode_radius[$n-1-($clusters[$i][0]+$idx)];
                $x = round($r*cos($a)+$xc);
                $y = round($yc-$r*sin($a));
        
                // The distance from the arc depends on chosen font and the "R-Factor"
                $r += $fh*$this->iGuideLineRFactor;

                // Should the labels be placed curved along the pie or in straight columns
                // outside the pie?
                if ($this->iGuideLineCurve) {
                    $xt=round($r*cos($a)+$xc);
                }

                // If this is the first slice in the cluster we need some first time
                // proessing
                if ($idx == $start) {
                    if (! $this->iGuideLineCurve) {
                        $xt=round($r*cos($a)+$xc);
                    }
                    $yt=round($yc-$r*sin($a));

                    // Some special consideration in case this cluster starts
                    // in quadrant 1 or 3 very close to the "equator" (< 20 degrees)
                    // and the previous clusters last slice is within the tolerance.
                    // In that case we add a font height to this labels Y-position
                    // so it doesn't collide with
                    // the slice in the previous cluster
                    $prevcluster = ($i + ($nc-1)) % $nc;
                    $previdx=$clusters[$prevcluster][0]+$clusters[$prevcluster][1]-1;
                    if ($q == 1 && $a > 160*M_PI/180) {
                        // Get the angle for the previous clusters last slice
                        $diff = abs($a-$this->la[$previdx]);
                        if ($diff < $tresh_hold) {
                            $yt -= $fh;
                        }
                    } elseif ($q == 3 && $a > 340*M_PI/180) {
                        // We need to subtract 360 to compare angle distance between
                        // q=0 and q=3
                        $diff = abs($a-$this->la[$previdx]-360*M_PI/180);
                        if ($diff < $tresh_hold) {
                            $yt += $fh;
                        }
                    }
                } else {
                    // The step is at minimum $vstep but if the slices are relatively large
                    // we make sure that we add at least a step that corresponds to the vertical
                    // distance between the centers at the arc on the slice
                    $prev_a = $this->la[$clusters[$i][0]+($idx-$step)];
                    $dy = abs($radius*(sin($a)-sin($prev_a))*1.2);
                    if ($vstep > 0) {
                        $yt += max($vstep, $dy);
                    } else {
                        $yt += min($vstep, -$dy);
                    }
                }

                $label = $this->labels[$clusters[$i][0]+$idx];

                if ($csize == 1) {
                    // A "meta" cluster with only one slice
                    $r = $radius+$this->explode_radius[$n-1-($clusters[$i][0]+$idx)];
                    $rr = $r+$img->GetFontHeight()/2;
                    $xt=round($rr*cos($a)+$xc);
                    $yt=round($yc-$rr*sin($a));
                    $this->StrokeLabel($label, $img, $xc, $yc, $a, $r);
                    if ($this->iShowGuideLineForSingle) {
                        $this->guideline->Stroke($img, $x, $y, $xt, $yt);
                    }
                } else {
                    $this->guideline->Stroke($img, $x, $y, $xt, $yt);
                    if ($q==1 || $q==2) {
                        // Left side of Pie
                        $this->guideline->Stroke($img, $xt, $yt, $xt-$this->guidelinemargin, $yt);
                        $lbladj = -$this->guidelinemargin-5;
                        $this->value->halign = "right";
                        $this->value->valign = "center";
                    } else {
                        // Right side of pie
                        $this->guideline->Stroke($img, $xt, $yt, $xt+$this->guidelinemargin, $yt);
                        $lbladj = $this->guidelinemargin+5;
                        $this->value->halign = "left";
                        $this->value->valign = "center";
                    }
                    $this->value->Stroke($img, $label, $xt+$lbladj, $yt);
                }

                // Udate idx to point to next slice in the cluster to process
                $idx += $step;
            }
        }
    }

    public function StrokeAllLabels($img, $xc, $yc, $radius)
    {
        // First normalize all angles for labels
        $n = count($this->la);
        for ($i=0; $i < $n; ++$i) {
            $this->la[$i] = $this->NormAngle($this->la[$i]);
        }
        if ($this->guideline->iShow) {
            $this->StrokeGuideLabels($img, $xc, $yc, $radius);
        } else {
            $n = count($this->labels);
            for ($i=0; $i < $n; ++$i) {
                $this->StrokeLabel(
                    $this->labels[$i],
                    $img,
                    $xc,
                    $yc,
                    $this->la[$i],
                    $radius + $this->explode_radius[$n-1-$i]
                );
            }
        }
    }

    // Position the labels of each slice
    public function StrokeLabel($label, $img, $xc, $yc, $a, $r)
    {

    // Default value
        if ($this->ilabelposadj === 'auto') {
            $this->ilabelposadj = 0.65;
        }

        // We position the values diferently depending on if they are inside
        // or outside the pie
        if ($this->ilabelposadj < 1.0) {
            $this->value->SetAlign('center', 'center');
            $this->value->margin = 0;
        
            $xt=round($this->ilabelposadj*$r*cos($a)+$xc);
            $yt=round($yc-$this->ilabelposadj*$r*sin($a));
        
            $this->value->Stroke($img, $label, $xt, $yt);
        } else {
            $this->value->halign = "left";
            $this->value->valign = "top";
            $this->value->margin = 0;
                
            // Position the axis title.
            // dx, dy is the offset from the top left corner of the bounding box that sorrounds the text
            // that intersects with the extension of the corresponding axis. The code looks a little
            // bit messy but this is really the only way of having a reasonable position of the
            // axis titles.
            $this->value->ApplyFont($img);
            $h=$img->GetTextHeight($label);
            // For numeric values the format of the display value
            // must be taken into account
            if (is_numeric($label)) {
                if ($label > 0) {
                    $w=$img->GetTextWidth(sprintf($this->value->format, $label));
                } else {
                    $w=$img->GetTextWidth(sprintf($this->value->negformat, $label));
                }
            } else {
                $w=$img->GetTextWidth($label);
            }

            if ($this->ilabelposadj > 1.0 && $this->ilabelposadj < 5.0) {
                $r *= $this->ilabelposadj;
            }
        
            $r += $img->GetFontHeight()/1.5;

            $xt=round($r*cos($a)+$xc);
            $yt=round($yc-$r*sin($a));

            // Normalize angle
            while ($a < 0) {
                $a += 2*M_PI;
            }
            while ($a > 2*M_PI) {
                $a -= 2*M_PI;
            }

            if ($a>=7*M_PI/4 || $a <= M_PI/4) {
                $dx=0;
            }
            if ($a>=M_PI/4 && $a <= 3*M_PI/4) {
                $dx=($a-M_PI/4)*2/M_PI;
            }
            if ($a>=3*M_PI/4 && $a <= 5*M_PI/4) {
                $dx=1;
            }
            if ($a>=5*M_PI/4 && $a <= 7*M_PI/4) {
                $dx=(1-($a-M_PI*5/4)*2/M_PI);
            }
        
            if ($a>=7*M_PI/4) {
                $dy=(($a-M_PI)-3*M_PI/4)*2/M_PI;
            }
            if ($a<=M_PI/4) {
                $dy=(1-$a*2/M_PI);
            }
            if ($a>=M_PI/4 && $a <= 3*M_PI/4) {
                $dy=1;
            }
            if ($a>=3*M_PI/4 && $a <= 5*M_PI/4) {
                $dy=(1-($a-3*M_PI/4)*2/M_PI);
            }
            if ($a>=5*M_PI/4 && $a <= 7*M_PI/4) {
                $dy=0;
            }
        
            $this->value->Stroke($img, $label, $xt-$dx*$w, $yt-$dy*$h);
        }
    }
} // Class


//===================================================
// CLASS PiePlotC
// Description: Same as a normal pie plot but with a
// filled circle in the center
//===================================================
class PiePlotC extends PiePlot
{
    private $imidsize=0.5;		// Fraction of total width
    private $imidcolor='white';
    public $midtitle='';
    private $middlecsimtarget='';
    private $middlecsimwintarget='';
    private $middlecsimalt='';

    public function PiePlotC($data, $aCenterTitle='')
    {
        parent::PiePlot($data);
        $this->midtitle = new Text();
        $this->midtitle->ParagraphAlign('center');
    }

    public function SetMid($aTitle, $aColor='white', $aSize=0.5)
    {
        $this->midtitle->Set($aTitle);

        $this->imidsize = $aSize ;
        $this->imidcolor = $aColor ;
    }

    public function SetMidTitle($aTitle)
    {
        $this->midtitle->Set($aTitle);
    }

    public function SetMidSize($aSize)
    {
        $this->imidsize = $aSize ;
    }

    public function SetMidColor($aColor)
    {
        $this->imidcolor = $aColor ;
    }

    public function SetMidCSIM($aTarget, $aAlt='', $aWinTarget='')
    {
        $this->middlecsimtarget = $aTarget;
        $this->middlecsimwintarget = $aWinTarget;
        $this->middlecsimalt = $aAlt;
    }

    public function AddSliceToCSIM($i, $xc, $yc, $radius, $sa, $ea)
    {
        //Slice number, ellipse centre (x,y), radius, start angle, end angle
        while ($sa > 2*M_PI) {
            $sa = $sa - 2*M_PI;
        }
        while ($ea > 2*M_PI) {
            $ea = $ea - 2*M_PI;
        }

        $sa = 2*M_PI - $sa;
        $ea = 2*M_PI - $ea;

        // Special case when we have only one slice since then both start and end
        // angle will be == 0
        if (abs($sa - $ea) < 0.0001) {
            $sa=2*M_PI;
            $ea=0;
        }

        // Add inner circle first point
        $xp = floor(($this->imidsize*$radius*cos($ea))+$xc);
        $yp = floor($yc-($this->imidsize*$radius*sin($ea)));
        $coords = "$xp, $yp";
    
        //add coordinates every 0.25 radians
        $a=$ea+0.25;

        // If we cross the 360-limit with a slice we need to handle
        // the fact that end angle is smaller than start
        if ($sa < $ea) {
            while ($a <= 2*M_PI) {
                $xp = floor($radius*cos($a)+$xc);
                $yp = floor($yc-$radius*sin($a));
                $coords.= ", $xp, $yp";
                $a += 0.25;
            }
            $a -= 2*M_PI;
        }

        while ($a < $sa) {
            $xp = floor(($this->imidsize*$radius*cos($a)+$xc));
            $yp = floor($yc-($this->imidsize*$radius*sin($a)));
            $coords.= ", $xp, $yp";
            $a += 0.25;
        }

        // Make sure we end at the last point
        $xp = floor(($this->imidsize*$radius*cos($sa)+$xc));
        $yp = floor($yc-($this->imidsize*$radius*sin($sa)));
        $coords.= ", $xp, $yp";

        // Straight line to outer circle
        $xp = floor($radius*cos($sa)+$xc);
        $yp = floor($yc-$radius*sin($sa));
        $coords.= ", $xp, $yp";

        //add coordinates every 0.25 radians
        $a=$sa - 0.25;
        while ($a > $ea) {
            $xp = floor($radius*cos($a)+$xc);
            $yp = floor($yc-$radius*sin($a));
            $coords.= ", $xp, $yp";
            $a -= 0.25;
        }
        
        //Add the last point on the arc
        $xp = floor($radius*cos($ea)+$xc);
        $yp = floor($yc-$radius*sin($ea));
        $coords.= ", $xp, $yp";

        // Close the arc
        $xp = floor(($this->imidsize*$radius*cos($ea))+$xc);
        $yp = floor($yc-($this->imidsize*$radius*sin($ea)));
        $coords .= ", $xp, $yp";

        if (!empty($this->csimtargets[$i])) {
            $this->csimareas .= "<area shape=\"poly\" coords=\"$coords\" href=\"".
        $this->csimtargets[$i]."\"";
            if (!empty($this->csimwintargets[$i])) {
                $this->csimareas .= " target=\"".$this->csimwintargets[$i]."\" ";
            }
            if (!empty($this->csimalts[$i])) {
                $tmp=sprintf($this->csimalts[$i], $this->data[$i]);
                $this->csimareas .= " title=\"$tmp\"  alt=\"$tmp\" ";
            }
            $this->csimareas .= " />\n";
        }
    }


    public function Stroke($img, $aaoption=0)
    {

    // Stroke the pie but don't stroke values
        $tmp =  $this->value->show;
        $this->value->show = false;
        parent::Stroke($img, $aaoption);
        $this->value->show = $tmp;

        $xc = round($this->posx*$img->width);
        $yc = round($this->posy*$img->height);

        $radius = floor($this->radius * min($img->width, $img->height)) ;


        if ($this->imidsize > 0 && $aaoption !== 2) {
            if ($this->ishadowcolor != "") {
                $img->SetColor($this->ishadowcolor);
                $img->FilledCircle(
                    $xc+$this->ishadowdrop,
                    $yc+$this->ishadowdrop,
                    round($radius*$this->imidsize)
                );
            }

            $img->SetColor($this->imidcolor);
            $img->FilledCircle($xc, $yc, round($radius*$this->imidsize));

            if ($this->pie_border && $aaoption === 0) {
                $img->SetColor($this->color);
                $img->Circle($xc, $yc, round($radius*$this->imidsize));
            }

            if (!empty($this->middlecsimtarget)) {
                $this->AddMiddleCSIM($xc, $yc, round($radius*$this->imidsize));
            }
        }

        if ($this->value->show && $aaoption !== 1) {
            $this->StrokeAllLabels($img, $xc, $yc, $radius);
            $this->midtitle->SetPos($xc, $yc, 'center', 'center');
            $this->midtitle->Stroke($img);
        }
    }

    public function AddMiddleCSIM($xc, $yc, $r)
    {
        $xc=round($xc);
        $yc=round($yc);
        $r=round($r);
        $this->csimareas .= "<area shape=\"circle\" coords=\"$xc,$yc,$r\" href=\"".
        $this->middlecsimtarget."\"";
        if (!empty($this->middlecsimwintarget)) {
            $this->csimareas .= " target=\"".$this->middlecsimwintarget."\"";
        }
        if (!empty($this->middlecsimalt)) {
            $tmp = $this->middlecsimalt;
            $this->csimareas .= " title=\"$tmp\" alt=\"$tmp\" ";
        }
        $this->csimareas .= " />\n";
    }

    public function StrokeLabel($label, $img, $xc, $yc, $a, $r)
    {
        if ($this->ilabelposadj === 'auto') {
            $this->ilabelposadj = (1-$this->imidsize)/2+$this->imidsize;
        }

        parent::StrokeLabel($label, $img, $xc, $yc, $a, $r);
    }
}


//===================================================
// CLASS PieGraph
// Description:
//===================================================
class PieGraph extends Graph
{
    private $posx;
    private $posy;
    private $radius;
    private $legends=array();
    public $plots=array();
    public $pieaa = false ;
    //---------------
    // CONSTRUCTOR
    public function PieGraph($width=300, $height=200, $cachedName="", $timeout=0, $inline=1)
    {
        $this->Graph($width, $height, $cachedName, $timeout, $inline);
        $this->posx=$width/2;
        $this->posy=$height/2;
        $this->SetColor(array(255,255,255));
    }

    //---------------
    // PUBLIC METHODS
    public function Add($aObj)
    {
        if (is_array($aObj) && count($aObj) > 0) {
            $cl = $aObj[0];
        } else {
            $cl = $aObj;
        }

        if ($cl instanceof Text) {
            $this->AddText($aObj);
        } elseif (class_exists('IconPlot', false) && ($cl instanceof IconPlot)) {
            $this->AddIcon($aObj);
        } else {
            if (is_array($aObj)) {
                $n = count($aObj);
                for ($i=0; $i < $n; ++$i) {
                    $this->plots[] = $aObj[$i];
                }
            } else {
                $this->plots[] = $aObj;
            }
        }
    }

    public function SetAntiAliasing($aFlg=true)
    {
        $this->pieaa = $aFlg;
    }
    
    public function SetColor($c)
    {
        $this->SetMarginColor($c);
    }


    public function DisplayCSIMAreas()
    {
        $csim="";
        foreach ($this->plots as $p) {
            $csim .= $p->GetCSIMareas();
        }
        //$csim.= $this->legend->GetCSIMareas();
        if (preg_match_all("/area shape=\"(\w+)\" coords=\"([0-9\, ]+)\"/", $csim, $coords)) {
            $this->img->SetColor($this->csimcolor);
            $n = count($coords[0]);
            for ($i=0; $i < $n; $i++) {
                if ($coords[1][$i]=="poly") {
                    preg_match_all('/\s*([0-9]+)\s*,\s*([0-9]+)\s*,*/', $coords[2][$i], $pts);
                    $this->img->SetStartPoint($pts[1][count($pts[0])-1], $pts[2][count($pts[0])-1]);
                    $m = count($pts[0]);
                    for ($j=0; $j < $m; $j++) {
                        $this->img->LineTo($pts[1][$j], $pts[2][$j]);
                    }
                } elseif ($coords[1][$i]=="rect") {
                    $pts = preg_split('/,/', $coords[2][$i]);
                    $this->img->SetStartPoint($pts[0], $pts[1]);
                    $this->img->LineTo($pts[2], $pts[1]);
                    $this->img->LineTo($pts[2], $pts[3]);
                    $this->img->LineTo($pts[0], $pts[3]);
                    $this->img->LineTo($pts[0], $pts[1]);
                }
            }
        }
    }

    // Method description
    public function Stroke($aStrokeFileName="")
    {
        // If the filename is the predefined value = '_csim_special_'
        // we assume that the call to stroke only needs to do enough
        // to correctly generate the CSIM maps.
        // We use this variable to skip things we don't strictly need
        // to do to generate the image map to improve performance
        // a best we can. Therefor you will see a lot of tests !$_csim in the
        // code below.
        $_csim = ($aStrokeFileName===_CSIM_SPECIALFILE);

        // We need to know if we have stroked the plot in the
        // GetCSIMareas. Otherwise the CSIM hasn't been generated
        // and in the case of GetCSIM called before stroke to generate
        // CSIM without storing an image to disk GetCSIM must call Stroke.
        $this->iHasStroked = true;

        $n = count($this->plots);

        if ($this->pieaa) {
            if (!$_csim) {
                if ($this->background_image != "") {
                    $this->StrokeFrameBackground();
                } else {
                    $this->StrokeFrame();
                    $this->StrokeBackgroundGrad();
                }
            }


            $w = $this->img->width;
            $h = $this->img->height;
            $oldimg = $this->img->img;

            $this->img->CreateImgCanvas(2*$w, 2*$h);
        
            $this->img->SetColor($this->margin_color);
            $this->img->FilledRectangle(0, 0, 2*$w-1, 2*$h-1);

            // Make all icons *2 i size since we will be scaling down the
            // imahe to do the anti aliasing
            $ni = count($this->iIcons);
            for ($i=0; $i < $ni; ++$i) {
                $this->iIcons[$i]->iScale *= 2 ;
                if ($this->iIcons[$i]->iX > 1) {
                    $this->iIcons[$i]->iX *= 2 ;
                }
                if ($this->iIcons[$i]->iY > 1) {
                    $this->iIcons[$i]->iY *= 2 ;
                }
            }

            $this->StrokeIcons();

            for ($i=0; $i < $n; ++$i) {
                if ($this->plots[$i]->posx > 1) {
                    $this->plots[$i]->posx *= 2 ;
                }
                if ($this->plots[$i]->posy > 1) {
                    $this->plots[$i]->posy *= 2 ;
                }

                $this->plots[$i]->Stroke($this->img, 1);

                if ($this->plots[$i]->posx > 1) {
                    $this->plots[$i]->posx /= 2 ;
                }
                if ($this->plots[$i]->posy > 1) {
                    $this->plots[$i]->posy /= 2 ;
                }
            }

            $indent = $this->doframe ? ($this->frame_weight + ($this->doshadow ? $this->shadow_width : 0)) : 0 ;
            $indent += $this->framebevel ? $this->framebeveldepth + 1 : 0 ;
            $this->img->CopyCanvasH(
                $oldimg,
                $this->img->img,
                $indent,
                $indent,
                $indent,
                $indent,
                $w-2*$indent,
                $h-2*$indent,
                2*($w-$indent),
                2*($h-$indent)
            );

            $this->img->img = $oldimg ;
            $this->img->width = $w ;
            $this->img->height = $h ;

            for ($i=0; $i < $n; ++$i) {
                $this->plots[$i]->Stroke($this->img, 2); // Stroke labels
                $this->plots[$i]->Legend($this);
            }
        } else {
            if (!$_csim) {
                if ($this->background_image != "") {
                    $this->StrokeFrameBackground();
                } else {
                    $this->StrokeFrame();
                }
            }

            $this->StrokeIcons();

            for ($i=0; $i < $n; ++$i) {
                $this->plots[$i]->Stroke($this->img);
                $this->plots[$i]->Legend($this);
            }
        }

        $this->legend->Stroke($this->img);
        $this->footer->Stroke($this->img);
        $this->StrokeTitles();

        if (!$_csim) {

        // Stroke texts
            if ($this->texts != null) {
                $n = count($this->texts);
                for ($i=0; $i < $n; ++$i) {
                    $this->texts[$i]->Stroke($this->img);
                }
            }

            if (_JPG_DEBUG) {
                $this->DisplayCSIMAreas();
            }

            // Should we do any final image transformation
            if ($this->iImgTrans) {
                if (!class_exists('ImgTrans', false)) {
                    require_once('jpgraph_imgtrans.php');
                    //JpGraphError::Raise('In order to use image transformation you must include the file jpgraph_imgtrans.php in your script.');
                }
           
                $tform = new ImgTrans($this->img->img);
                $this->img->img = $tform->Skew3D(
                    $this->iImgTransHorizon,
                    $this->iImgTransSkewDist,
                    $this->iImgTransDirection,
                    $this->iImgTransHighQ,
                    $this->iImgTransMinSize,
                    $this->iImgTransFillColor,
                    $this->iImgTransBorder
                );
            }


            // If the filename is given as the special "__handle"
            // then the image handler is returned and the image is NOT
            // streamed back
            if ($aStrokeFileName == _IMG_HANDLER) {
                return $this->img->img;
            } else {
                // Finally stream the generated picture
                $this->cache->PutAndStream(
                    $this->img,
                    $this->cache_name,
                    $this->inline,
                    $aStrokeFileName
                );
            }
        }
    }
} // Class

/* EOF */