Circular Label Layout

[Standalone Version] perldemo\circlelabelpie.pl

#!/usr/bin/perl

# In the sample code, the ChartDirector for Perl module is assumed to be in "../lib"
use File::Basename;
use lib (dirname($0)."/../lib") =~ /(.*)/;

use perlchartdir;

sub createChart
{
    my $chartIndex = shift;

    # The data for the pie chart
    my $data = [42, 18, 8];

    # The labels for the pie chart
    my $labels = ["Agree", "Disagree", "Not Sure"];

    # The colors to use for the sectors
    my $colors = [0x66ff66, 0xff6666, 0xffff00];

    # Create a PieChart object of size 300 x 300 pixels. Set the background to a gradient color from
    # blue (aaccff) to sky blue (ffffff), with a grey (888888) border. Use rounded corners and soft
    # drop shadow.
    my $c = new PieChart(300, 300);
    $c->setBackground($c->linearGradientColor(0, 0, 0, $c->getHeight() / 2, 0xaaccff, 0xffffff),
        0x888888);
    $c->setRoundedFrame();
    $c->setDropShadow();

    if ($chartIndex == 0) {
    #============================================================
    #    Draw a pie chart where the label is on top of the pie
    #============================================================

        # Set the center of the pie at (150, 150) and the radius to 120 pixels
        $c->setPieSize(150, 150, 120);

        # Set the label position to -40 pixels from the perimeter of the pie (-ve means label is
        # inside the pie)
        $c->setLabelPos(-40);

    } else {
    #============================================================
    #    Draw a pie chart where the label is outside the pie
    #============================================================

        # Set the center of the pie at (150, 150) and the radius to 80 pixels
        $c->setPieSize(150, 150, 80);

        # Set the sector label position to be 20 pixels from the pie. Use a join line to connect the
        # labels to the sectors.
        $c->setLabelPos(20, $perlchartdir::LineColor);

    }

    # Set the pie data and the pie labels
    $c->setData($data, $labels);

    # Set the sector colors
    $c->setColors2($perlchartdir::DataColor, $colors);

    # Use local gradient shading, with a 1 pixel semi-transparent black (bb000000) border
    $c->setSectorStyle($perlchartdir::LocalGradientShading, 0xbb000000, 1);

    # Output the chart
    $c->makeChart("circlelabelpie$chartIndex.png")
}

createChart(0);
createChart(1);

[CGI Version] perldemo_cgi\circlelabelpie.pl

#!/usr/bin/perl

# In the sample code, the ChartDirector for Perl module is assumed to be in "../lib"
use File::Basename;
use lib (dirname($0)."/../lib") =~ /(.*)/;

use perlchartdir;

# Get HTTP query parameters
use CGI;
my $query = new CGI;

# This script can draw different charts depending on the chartIndex
$chartIndex = int($query->param("img"));

# The data for the pie chart
my $data = [42, 18, 8];

# The labels for the pie chart
my $labels = ["Agree", "Disagree", "Not Sure"];

# The colors to use for the sectors
my $colors = [0x66ff66, 0xff6666, 0xffff00];

# Create a PieChart object of size 300 x 300 pixels. Set the background to a gradient color from
# blue (aaccff) to sky blue (ffffff), with a grey (888888) border. Use rounded corners and soft drop
# shadow.
my $c = new PieChart(300, 300);
$c->setBackground($c->linearGradientColor(0, 0, 0, $c->getHeight() / 2, 0xaaccff, 0xffffff),
    0x888888);
$c->setRoundedFrame();
$c->setDropShadow();

if ($chartIndex == 0) {
#============================================================
#    Draw a pie chart where the label is on top of the pie
#============================================================

    # Set the center of the pie at (150, 150) and the radius to 120 pixels
    $c->setPieSize(150, 150, 120);

    # Set the label position to -40 pixels from the perimeter of the pie (-ve means label is inside
    # the pie)
    $c->setLabelPos(-40);

} else {
#============================================================
#    Draw a pie chart where the label is outside the pie
#============================================================

    # Set the center of the pie at (150, 150) and the radius to 80 pixels
    $c->setPieSize(150, 150, 80);

    # Set the sector label position to be 20 pixels from the pie. Use a join line to connect the
    # labels to the sectors.
    $c->setLabelPos(20, $perlchartdir::LineColor);

}

# Set the pie data and the pie labels
$c->setData($data, $labels);

# Set the sector colors
$c->setColors2($perlchartdir::DataColor, $colors);

# Use local gradient shading, with a 1 pixel semi-transparent black (bb000000) border
$c->setSectorStyle($perlchartdir::LocalGradientShading, 0xbb000000, 1);

# Output the chart
binmode(STDOUT);
print "Content-type: image/png\n\n";
print $c->makeChart2($perlchartdir::PNG);