NAME

Chart::Clicker::Tutorial - A Tutorial for using Chart::Clicker

VERSION

version 2.90

DESCRIPTION

This document aims to provide a tutorial for using Chart::Clicker.

EXAMPLES

Simple chart from a single data source

# grab the needed modules
use Chart::Clicker;
use Chart::Clicker::Data::Series;
use Chart::Clicker::Data::DataSet;

# build the chart
my $chart = Chart::Clicker->new;

# build the series (static here, will usually be supplied arrayrefs from elsewhere)
my $series = Chart::Clicker::Data::Series->new(
    keys	=>	[ 1,2,3,4,5 ],
    values	=>	[ 52,74,52,82,14 ],
);

# build the dataset
my $dataset = Chart::Clicker::Data::DataSet->new(
    series	=>	[ $series ],
);

# add the dataset to the chart
$chart->add_to_datasets($dataset);

# write the chart to a file
$chart->write_output('chart.png');

Simple chart from multiple data sources

use Chart::Clicker;
use Chart::Clicker::Data::Series;
use Chart::Clicker::Data::DataSet;

my $chart = Chart::Clicker->new;

# start an array that will hold the series data
my $series1 = Chart::Clicker::Data::Series->new(
    keys    =>      [ 1,2,3,4,5 ],
    values  =>      [ 52,74,52,82,14 ]
);
my $series2 = Chart::Clicker::Data::Series->new(
    keys	=>	[ 1,2,3,4,5 ],
    values	=>	[ 34,67,89,45,67 ]
);

# add the array of series data to the dataset
my $dataset = Chart::Clicker::Data::DataSet->new(
    series  => [ $series1, $series2 ]
);

$chart->add_to_datasets($dataset);

$chart->write_output('chart.png');

Simple chart with multiple data sources and custom colors

use Chart::Clicker;
use Chart::Clicker::Data::Series;
use Chart::Clicker::Data::DataSet;
# some new modules, these are only needed if you want to monkey with color changing
use Graphics::Color::RGB;
use Chart::Clicker::Drawing::ColorAllocator;

# build the color allocator
my $ca = Chart::Clicker::Drawing::ColorAllocator->new;
# this hash is simply here to make things readable and cleaner, you can always call G::C::R inline
my $red = Graphics::Color::RGB->new({
    red => .75, green => 0, blue => 0, alpha => .8
});
my $green = Graphics::Color::RGB->new({
    red => 0,green => .75, blue=> 0, alpha=> .8
});
my $blue = Graphics::Color::RGB->new({
    red => 0, green => 0, blue => .75, alpha => .8
}),

my $chart = Chart::Clicker->new;

# Create an empty dataset that we can add to
my $dataset = Chart::Clicker::Data::DataSet->new;

$dataset->add_to_series(Chart::Clicker::Data::Series->new(
    keys    => [ 1,2,3,4,5 ],
    values  => [ 52,74,52,82,14 ]
));
# add a color - note that the order of colors and the order of the
# series must match, the first series will use the first color and so on
# see contexts and axes for alternate ways of doing this
$ca->add_to_colors($blue);

$dataset->add_to_series(Chart::Clicker::Data::Series->new(
    keys    =>  [ 1,2,3,4,5 ],
    values   =>  [ 34,67,89,45,67 ]
));
# add a second color
$ca->add_to_colors($red);

$dataset->add_to_series(Chart::Clicker::Data::Series->new(
    keys    =>  [ 1,2,3,4,5 ],
    values  =>  [ 11,22,33,44,55 ]
));
# add a third color
$ca->add_to_colors($green);

$chart->add_to_datasets($dataset);

# assign the color allocator to the chart
$chart->color_allocator($ca);

$chart->write_output('chart.png');

Example 4 : Simple chart with a different render type

use Chart::Clicker;
use Chart::Clicker::Data::Series;
use Chart::Clicker::Data::DataSet;
# add in the module of the renerer(s) you want to use
use Chart::Clicker::Renderer::Area;

my $chart = Chart::Clicker->new;

my $series = Chart::Clicker::Data::Series->new(
    keys    => [ 1,2,3,4,5 ],
    values  => [ 52,74,52,82,14 ]
);

my $dataset = Chart::Clicker::Data::DataSet->new(
    series  => [ $series ]
);

$chart->add_to_datasets($dataset);

# build the renderer to use
my $renderer = Chart::Clicker::Renderer::Area->new(
    opacity => .75,
);

# assign the renderer to the default context
$chart->set_renderer($renderer);

$chart->write_output('chart.png');

Example 5 : Width and Height

my $chart = Chart::Clicker->new(width => 1024, height => 768);

Example 6 : PDF (or SVG or PS)

my $chart = Chart::Clicker->new(format => 'pdf');

# Create the rest of your chart normally

$chart->write_output('chart.pdf');

Example 7 : Hide the Legend and X-Axis

my $chart = Chart::Clicker->new;

# hide the legend
$chart->legend->visible(0);

# hide the X-Axis
$chart->get_context('default')->domain_axis->hidden(1);

Example 8 : Change the display format of the Y-Axis

my $chart = Chart::Clicker->new;

# a sprintf format to have 3 decimal places showing on the Y-Axis
$chart->get_context('default')->range_axis->format('%.3f');

DISCLAIMER

This is a work in progress. If you find errors or would like to make contributions, drop me a line!

AUTHOR

Cory G Watson <gphat@cpan.org>

COPYRIGHT AND LICENSE

This software is copyright (c) 2016 by Cory G Watson.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.