Class: Scruffy::Components::DataMarkers

Inherits:
Base
  • Object
show all
Includes:
Helpers::Marker
Defined in:
lib/scruffy/components/data_markers.rb

Instance Attribute Summary collapse

Attributes inherited from Base

#id, #options, #position, #size, #visible

Instance Method Summary collapse

Methods included from Helpers::Marker

#each_marker

Methods inherited from Base

#initialize, #process, #render

Constructor Details

This class inherits a constructor from Scruffy::Components::Base

Instance Attribute Details

#markers ⇒ Object

Returns the value of attribute markers.



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# File 'lib/scruffy/components/data_markers.rb', line 8

def markers
  @markers
end

Instance Method Details

#draw(svg, bounds, options = {}) ⇒ Object 



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# File 'lib/scruffy/components/data_markers.rb', line 10

def draw(svg, bounds, options={})
  if options[:calculate_markers] && (options[:point_markers].nil? || options[:point_markers].empty?)
    markers = (options[:markers] || self.markers) || 5
    options[:point_markers] = []
    each_marker(markers, options[:min_key], options[:max_key], bounds[:width], options, :key_formatter) do |label, x|
      options[:point_markers] << [x, label]
    end
  end
  unless options[:point_markers].nil?
    dx = bounds[:width].to_f / (options[:max_key] - options[:min_key] + 1)
    (0...options[:point_markers].size).map do |idx| 
      x_coord = dx * (options[:point_markers][idx].first - options[:min_key]) + dx/2
      if options[:point_markers_ticks]
        svg.line(:x1 => x_coord, :y1 => 0, :x2 => x_coord, :y2 => -3, :style => "stroke:#{(options[:theme].marker || 'white').to_s}; stroke-width:1")
      end

      svg.text(options[:point_markers][idx].last,
        :x => 0,
        :y => 0, 
        'font-size' => options[:theme].marker_font_size || relative(90),
        'font-family' => options[:theme].font_family,
        :transform => "translate(#{x_coord},#{bounds[:height]}) rotate(#{options[:point_markers_rotation] || 0})",
        :fill => (options[:theme].marker || 'white').to_s, 
        'text-anchor' => 'middle') unless options[:point_markers][idx].nil?
    end
  end
end