Subversion Repositories Sites.tela-botanica.org

Rev

Rev 4 | Go to most recent revision | Blame | Compare with Previous | Last modification | View Log | RSS feed 

<?php
/*=======================================================================
// File:        JPGRAPH_PIE.PHP
// Description: Pie plot extension for JpGraph
// Created:     2001-02-14
// Author:      Johan Persson (johanp@aditus.nu)
// Ver:         $Id: jpgraph_pie.php,v 1.1 2004/06/15 10:13:19 jpm Exp $
//
// License:     This code is released under QPL
// Copyright (C) 2001,2002 Johan Persson
//========================================================================
*/


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

//===================================================
// CLASS PiePlot
// Description: Draws a pie plot
//===================================================
class PiePlot {
    var $posx=0.5,$posy=0.5;
    var $radius=0.3;
    var $explode_radius=array(),$explode_all=false,$explode_r=20;
    var $labels=null, $legends=null;
    var $csimtargets=null;  // Array of targets for CSIM
    var $csimareas='';          // Generated CSIM text  
    var $csimalts=null;         // ALT tags for corresponding target
    var $data=null;
    var $title;
    var $startangle=0;
    var $weight=1, $color="black";
    var $legend_margin=6,$show_labels=true;
    var $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));
    var $theme="earth";
    var $setslicecolors=array();
    var $labeltype=0; // Default to percentage
    var $pie_border=true,$pie_interior_border=true;
    var $value;
    var $ishadowcolor='',$ishadowdrop=4;
    var $ilabelposadj=1;
    var $legendcsimtargets = array();
    var $legendcsimalts = array();
        
//---------------
// CONSTRUCTOR
    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%%');
    }

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

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

    function SetCSIMTargets($targets,$alts=null) {
        $this->csimtargets=array_reverse($targets);
        if( is_array($alts) )
            $this->csimalts=array_reverse($alts);
    }
        
    function GetCSIMareas() {
        return $this->csimareas;
    }

    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;

        //add coordinates of the centre to the map
        $coords = "$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;
        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]."\"";
        if( !empty($this->csimalts[$i]) ) {
            $tmp=sprintf($this->csimalts[$i],$this->data[$i]);
            $this->csimareas .= " alt=\"$tmp\" title=\"$tmp\"";
        }
        $this->csimareas .= ">\n";
    }

        
    function SetTheme($aTheme) {
        if( in_array($aTheme,array_keys($this->themearr)) )
            $this->theme = $aTheme;
        else
            JpGraphError::Raise("PiePLot::SetTheme() Unknown theme: $aTheme");
    }
        
    function ExplodeSlice($e,$radius=20) {
        $this->explode_radius[$e]=$radius;
    }

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

    function Explode($aExplodeArr) {
        if( !is_array($aExplodeArr) ) {
            JpGraphError::Raise("Argument to PiePlot::Explode() must be an array.");
        }
        $this->explode_radius = $aExplodeArr;
    }

    function SetStartAngle($aStart) {
        if( $aStart < 0 || $aStart > 360 ) {
            JpGraphError::Raise('Slice start angle must be between 0 and 360 degrees.');
        }
        $this->startangle = 360-$aStart;
    }
        
    function SetFont($family,$style=FS_NORMAL,$size=10) {
                JpGraphError::Raise('PiePlot::SetFont() is deprecated. Use PiePlot->value->SetFont() instead.');
    }
        
    // Size in percentage
    function SetSize($aSize) {
        if( ($aSize>0 && $aSize<=0.5) || ($aSize>10 && $aSize<1000) )
            $this->radius = $aSize;
        else
            JpGraphError::Raise("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]");
    }
        
    function SetFontColor($aColor) {
        JpGraphError::Raise('PiePlot::SetFontColor() is deprecated. Use PiePlot->value->SetColor() instead.');
    }
        
    // Set label arrays
    function SetLegends($aLegend) {
        $this->legends = $aLegend;
    }

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

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

    function SetValueType($aType) {
        $this->SetLabelType($aType);
    }


    // Should the circle around a pie plot be displayed
    function ShowBorder($exterior=true,$interior=true) {
        $this->pie_border = $exterior;
        $this->pie_interior_border = $interior;
    }
        
    // Setup the legends
    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);
        else {
            $this->setslicecolors = array_slice($this->setslicecolors,0,$n);
            $numcolors=$n; 
            if( $graph->pieaa && get_class($this)==='pieplot' ) { 
                $this->setslicecolors = array_reverse($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::Raise("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 != "" )
            $this->legends = array_reverse($this->legends);
        for( $i=$n-1; $i >= 0; --$i ) {
            $l = $this->legends[$i];
            // Replace possible format with actual values
            if( $this->labeltype==0 ) {
                $l = sprintf($l,100*$this->data[$i]/$sum);
            }
            else {
                $l = sprintf($l,$this->data[$i]);
            }
            
            $alt = sprintf($this->csimalts[$i],$this->data[$i]);
                                
            if( $this->setslicecolors==null ) 
                $graph->legend->Add($l,$colors[$ta[$i%$numcolors]],"",0,
                                    $this->csimtargets[$i],$alt);
            else
                $graph->legend->Add($l,$this->setslicecolors[$i%$numcolors],"",0,
                                    $this->csimtargets[$i],$alt);
        }
    }
        
    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;

        $colors = array_keys($img->rgb->rgb_table);
        sort($colors);  
        $ta=$this->themearr[$this->theme];      
        $n = count($this->data);
        
        if( $this->setslicecolors==null ) 
            $numcolors=count($ta);
        else {
            $this->setslicecolors = array_reverse(array_slice($this->setslicecolors,0,$n));
            $numcolors=$n; 
        }
        
        // 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::Raise("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 ;
                
        $this->startangle = $this->startangle*M_PI/180;

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

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


        if( $this->ishadowcolor != "" && $aaoption !== 2) {
            $accsum=0;
            $angle2 = $this->startangle;
            $img->SetColor($this->ishadowcolor);
            for($i=0; $sum>0 && $i < $n; ++$i) {
                $d = $this->data[$i];
                $angle1 = $angle2;
                $accsum += $d;
                $angle2 = $this->startangle+2*M_PI*$accsum/$sum;
                if( empty($this->explode_radius[$i]) )
                    $this->explode_radius[$i]=0;

                $la = 2*M_PI - (abs($angle2-$angle1)/2.0+$angle1);
                $xcm = $xc + $this->explode_radius[$i]*cos($la)*$expscale;
                $ycm = $yc - $this->explode_radius[$i]*sin($la)*$expscale;
                
                $xcm += $this->ishadowdrop*$expscale;
                $ycm += $this->ishadowdrop*$expscale;

                $img->CakeSlice($xcm,$ycm,$radius,$radius,
                                $angle1*180/M_PI,$angle2*180/M_PI,$this->ishadowcolor);
                
            }
        }

        $accsum=0;
        $angle2 = $this->startangle;
        $img->SetColor($this->color);
        for($i=0; $sum>0 && $i < $n; ++$i) {
            $d = $this->data[$i];
            $angle1 = $angle2;
            $accsum += $d;
            $angle2 = $this->startangle+2*M_PI*$accsum/$sum;

            if( $this->setslicecolors==null )
                $slicecolor=$colors[$ta[$i%$numcolors]];
            else
                $slicecolor=$this->setslicecolors[$i%$numcolors];

            if( $this->pie_interior_border && $aaoption===0 )
                $img->SetColor($this->color);
            else
                $img->SetColor($slicecolor);

            $arccolor = $this->pie_border && $aaoption===0 ? $this->color : "";

            $this->la[$i] = 2*M_PI - (abs($angle2-$angle1)/2.0+$angle1);

            if( empty($this->explode_radius[$i]) )
                $this->explode_radius[$i]=0;

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

            if( $aaoption !== 2 ) {
                $img->CakeSlice($xcm,$ycm,$radius-1,$radius-1,
                                $angle1*180/M_PI,$angle2*180/M_PI,$slicecolor,$arccolor);
            }

            if ($this->csimtargets && $aaoption !== 1 ) 
                $this->AddSliceToCSIM($i,$xcm,$ycm,$radius,$angle1,$angle2);

        }

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

            $this->StrokeAllLabels($img,$xc,$yc,$radius);
        }

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

    }

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

    function StrokeAllLabels($img,$xc,$yc,$radius) {
        $n = count($this->labels);
        for($i=0; $i < $n; ++$i) {
            $this->StrokeLabel($this->labels[$i],$img,$xc,$yc,$this->la[$i],
                               $radius + $this->explode_radius[$i]); 
        }
    }

    // Position the labels of each slice
    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.
            $img->SetFont($this->value->ff,$this->value->fs,$this->value->fsize);
            $h=$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));

            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 {
    var $imidsize=0.5;          // Fraction of total width
    var $imidcolor='white';
    var $midtitle='';
    var $middlecsimtarget="",$middlecsimalt="";

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

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

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

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

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

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

    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;

        // 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;
        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($this->csimalts[$i]) ) {
            $tmp=sprintf($this->csimalts[$i],$this->data[$i]);
            $this->csimareas .= " alt=\"$tmp\" title=\"$tmp\"";
        }
        $this->csimareas .= ">\n";
    }


    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);
            $this->midtitle->Pos($xc,$yc,'center','center');
            $this->midtitle->Stroke($img);
        }

    }

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

    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 {
    var $posx, $posy, $radius;          
    var $legends=array();       
    var $plots=array();
    var $pieaa = false ;
//---------------
// CONSTRUCTOR
    function PieGraph($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       
    function Add($aObj) {

        if( is_array($aObj) && count($aObj) > 0 )
            $cl = get_class($aObj[0]);
        else
            $cl = get_class($aObj);

        if( $cl == 'text' ) 
            $this->AddText($aObj);
        else
            $this->plots[] = $aObj;
    }

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


    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);
                for ($i=0; $i<count($coords[0]); $i++) {
                    if ($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($pts[0])-1]);
                        for ($j=0; $j<count($pts[0]); $j++) {
                            $this->img->LineTo($pts[1][$j],$pts[2][$j]);
                        }
                    } else if ($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
    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();               
                }
            }


            $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);

            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);
                $this->plots[$i]->Legend($this);
            }

        }
        else {

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

        if( !$_csim ) { 
            $this->StrokeTitles();

            // 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();
            }
            // 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 */
?>