>> You already have the image as a pie so why not just overlay a background-coloured circle on the middle?

This time I used GD::Image to draw a circle and inserted it to the pie chart.

Here's the code. It works...


#!/usr/bin/perl
use CGI ':standard';
use strict;
use warnings;
use GD;
use GD::Graph::pie;

my @df = `df -P /var`;
my ($used, $free) = (split (/\s+/, $df[1]))[2,3];

# Both the arrays should have same number of entries.
my @data = (['Used', 'Free'],
            [$used, $free]);

my $mygraph = GD::Graph::pie->new(175, 175);

$mygraph->set(
    title           => '/var Partition' ,
    '3d'            => 0,
    #'3d'           => 1,

    #label          => 'Label',

    transparent     => 1,

) or warn $mygraph->error;

$mygraph->set_value_font(GD::gdMediumBoldFont);

my $myimage = $mygraph->plot(\@data) or die $mygraph->error;

my $circleImg = new GD::Image( 100,100 );

# allocate some colors
my $green = $circleImg->colorAllocate(0,255,0);
my $white = $circleImg->colorAllocate(255,255,255);
my $blue = $circleImg->colorAllocate(0,0,255);

#$circleImg->transparent($green);
#$circleImg->interlaced('true');

# Draw a blue circle
$circleImg->arc(50,50,100,100,0,360,$blue);

# And fill it with color
$circleImg->fill(50,50,$white);

$myimage->copy($circleImg,38,46,0,0,100,100);

print "Content-type: image/png\n\n";
binmode STDOUT;
print $myimage->png;

[download]

Hv a Nice day to all perl Monks...

In reply to Re^3: doughnut charts with gd:graph by theravadamonk
in thread doughnut charts with gd:graph by theravadamonk

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.