NAME

       Chart::Clicker::Drawing::ColorAllocator - Color picker

VERSION

       version 2.90

SYNOPSIS

           use Graphics::Color::RGB;
           use Chart::Clicker::Drawing::ColorAllocator;

           my $ca = Chart::Clicker::Drawing::ColorAllocator->new({
               colors => [
                   Graphics::Color::RGB->new(
                       red => 1.0, green => 0, blue => 0, alpha => 1.0
                   ),
                   #...
               ]
           });

           my $red = $ca->get(0);

           #or let Chart::Clicker autmatically pick complementing colors for you
           my $ca2 = Chart::Clicker::Drawing::ColorAllocator->new({
               seed_hue => 0, #red
           });

DESCRIPTION

       Allocates colors for use in the chart.  The position in the color allocator corresponds to
       the series that will be colored.

AUTOMATIC COLOR ALLOCATION

       This module has the capacity to automatically allocate 96 individual colors using
       Color::Scheme. It does so by picking 4 hues equally spaced in the color wheel from the
       "seed_hue" (0 (red) would be complimented by 270 (blue), 180 (green) and 90 (yellow)).
       After those colors are allocated it moves on to picking from the colors between those (
       45, 135, 215, 305 ) etc. Once all values of "hues" have been utilized, it repeats them
       using a different shade.  This has the effect of generating evenly spaced complementing
       colors to ensure colors are well ditinguishable from one another and have appropriate
       contrast.

   position
       Gets the current position.

ATTRIBUTES

   colors
       An arrayref of colors that will be used for series that Clicker draws.

   color_scheme
       A lazy-building Color::Scheme object used to generate the color scheme of the chart;

   seed_hue
       The interger value of the first hue used when computing the tetrade color scheme. Setting
       this will affect the hue of the first color allocated.  Subsequent colors will be
       allocated based on their distance from this color to maintain sifficient contrast between
       colors. If not specified the seed_hue will default to 270, blue.

   hues
       An array reference of evenly spaced seed hues for color allocation. By default it will use
       the seed hue plus 0, 45, 75, 15, 60 and 30 which is enough to cover all web-safe colors
       when using a tetrade color scheme.

   shade_order
       An array reference of the order in which the different shades of each color will be used
       for every color scheme generated. It defaults to 1, 3, 0, 2 for optimum color spacing.

METHODS

   add_to_colors
       Add a color to this allocator.

   clear_colors
       Clear this allocator's colors

   color_count
       Get the number of colors in this allocator.

   get_color ($index)
       Gets the color at the specified index.  Returns undef if that position has no color.

   next
       Returns the next color.  Each call to next increments the position, so subsequent calls
       will return different colors.

   allocate_color
       Determines what the next color should be.

   reset
       Resets this allocator back to the beginning.

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.

perl v5.36.0                                2022-10-1Chart::Clicker::Drawing::ColorAllocator(3pm)