/ 
Chart-Clicker-1.99_07
River stage one • 4 direct dependents • 4 total dependents
/ Chart::Clicker::Axis

NAME

Chart::Clicker::Axis

DESCRIPTION

Chart::Clicker::Axis represents the plot of the chart.

SYNOPSIS

use Chart::Clicker::Axis;
use Graphics::Primitive::Font;
use Graphics::Primitive::Brush;

my $axis = Chart::Clicker::Axis->new({
  font  => Graphics::Primitive::Font->new,
  orientation => 'vertical',
  position => 'left',
  show_ticks => 1,
  brush = Graphics::Primitive::Brush->new,
  tick_length => 2,
  tick_brush => Graphics::Primitive::Brush->new,
  visible => 1,
});

METHODS

Constructor

new

Creates a new Chart::Clicker::Axis. If no arguments are given then sane defaults are chosen.

Instance Methods

baseline

Set the 'baseline' value of this axis. This is used by some renderers to change the way a value is marked. The Bar render, for instance, considers values below the base to be 'negative'.

brush

Set/Get the brush for this axis.

color

Set/Get the color of the axis.

font

Set/Get the font used for the axis' labels.

format

Set/Get the format to use for the axis values.

If the format is a string then format is applied to each value 'tick' via sprintf. See sprintf perldoc for details! This is useful for situations where the values end up with repeating decimals.

If the format is a coderef then that coderef will be executed and the value passed to it as an argument.

my $nf = Number::Format->new;
$default->domain_axis->format(sub { return $nf->format_number(shift); });
fudge_amount

Set/Get the amount to 'fudge' the span of this axis. You should supply a percentage (in decimal form) and the axis will grow at both ends by the supplied amount. This is useful when you want a bit of padding above and below the dataset.

As an example, a fugdge_amount of .10 on an axis with a span of 10 to 50 would add 5 to the top and bottom of the axis.

height

Set/Get the height of the axis.

label

Set/Get the label of the axis.

orientation

Set/Get the orientation of this axis. See Chart::Clicker::Drawing.

position

Set/Get the position of the axis on the chart.

range

Set/Get the Range for this axis.

show_ticks

Set/Get the show ticks flag. If this is value then the small tick marks at each mark on the axis will not be drawn.

tick_length

Set/Get the tick length.

tick_values

Set/Get the arrayref of values show as ticks on this Axis.

add_to_tick_values

Add a value to the list of tick values.

clear_tick_values

Clear all tick values.

tick_brush

Set/Get the stroke for the tick markers.

tick_value_count

Get a count of tick values.

tick_labels

Set/Get the arrayref of labels to show for ticks on this Axis. This arrayref is consulted for every tick, in order. So placing a string at the zeroeth index will result in it being displayed on the zeroeth tick, etc, etc.

ticks

Set/Get the number of 'ticks' to show. Setting this will divide the range on this axis by the specified value to establish tick values. This will have no effect if you specify tick_values.

mark

Given a span and a value, returns it's pixel position on this Axis.

format_value

Given a value, returns it formatted using this Axis' formatter.

prepare

Prepare this Axis by determining the size required. If the orientation is CC_HORIZONTAL this method sets the height. Otherwise sets the width.

draw

Draw this axis.

hidden

Set/Get this axis' hidden flag.

width

Set/Get this axis' width.

AUTHOR

Cory 'G' Watson <gphat@cpan.org>

SEE ALSO

perl(1)

LICENSE

You can redistribute and/or modify this code under the same terms as Perl itself.