++ed by:

1 non-PAUSE user.

Dave Cross

NAME

SVG::Timeline - Create SVG timeline charts

SYNOPSIS

    use SVG::Timeline;

    my $tl = SVG::Timeline->new;

    $tl->add_event({
      start => 1914,
      end   => 1918,
      text  => 'World War I',
    });

    $tl->add_event({
      start => 1939,
      end   => 1945,
      text  => 'World War II',
    });

    print $tl->draw;

DESCRIPTION

This module allows you to easily create SVG documents that represent timelines.

An SVG timeline is a diagram with a list of years across the top and a number of bars below. Each bar represents a period of time.

METHODS

new(\%options)

Creates and returns a new SVG::Timeline object.

Takes an optional hash reference containing configuration options. You probably don't need any of these, but the following options are supported:

  • events - a reference to an array containing events. Events are hash references. See add_event below for the format of events.

  • width - the width of the output in any format used by SVG. The default is 100%.

  • height - the height of the output in any format used by SVG. The default is 100%.

  • aspect_ratio - the default is 16/9.

  • viewport - a viewport definition (which is a space separated list of four integers. Unless you know what you're doing, it's probably best to leave the class to work this out for you.

  • svg - an instance of the SVG class that is used to generate the final SVG output. Unless you're using a subclass of this class for some reason, there is no reason to set this manually.

  • default_colour - the colour that is used to fill the timeline blocks. This should be defined in the RGB format used by SVG. For example, red would be 'RGB(255,0,0)'.

  • years_per_grid - the number of years between vertical grid lines in the output. The default of 10 should be fine unless your timeline covers a really long timespan.

  • bar_height - the height of an individual timeline bar.

  • bar_spacing - the height if the vertical space between bars (expresssed as a decimal fraction of the bar height).

  • decade_line_colour - the colour of the grid lines.

  • bar_outline_colour - the colour that is used for the outline of the timeline bars.

calculated_height

The height of the timeline in "calculated units".

calculated_width

The widtn in "calulated units".

units_per_year

The number of horizontal units that each year should take up.

draw_grid

Method to draw the underlying grid.

draw

Method to draw the timeline.

min_year

Returns the minimum year from all the events in the timeline.

max_year

Returns the maximum year from all the events in the timeline.

years

The number of years that all the events in the timeline span.

AUTHOR

Dave Cross <dave@perlhacks.com>

COPYRIGHT AND LICENCE

Copyright (c) 2017, Magnum Solutions Ltd. All Rights Reserved.

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