Class: Scruffy::Components::Graphs

Inherits:
Base
  • Object
show all
Defined in:
lib/scruffy/components/graphs.rb

Overview

Component for displaying Graphs layers.

Is passed all graph layers from the Graph object.

(This may change as the capability for Graph filtering and such fills out.)

Constant Summary collapse

STACKED_OPACITY = 
0.85

Instance Attribute Summary

Attributes inherited from Base

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

Instance Method Summary collapse

Methods inherited from Base

#initialize, #process, #render

Constructor Details

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

Instance Method Details

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



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# File 'lib/scruffy/components/graphs.rb', line 12

def draw(svg, bounds, options={})
  # If Graph is limited to a category, reject layers outside of it's scope.
  applicable_layers = options[:layers].reject do |l| 
    if @options[:only]
      (l.options[:category].nil? && l.options[:categories].nil?) ||
      (!l.options[:category].nil? && l.options[:category] != @options[:only]) || 
      (!l.options[:categories].nil? && !l.options[:categories].include?(@options[:only]))
    else 
      false
    end
  end

  applicable_layers.each_with_index do |layer, idx|
    layer_options = {}
    layer_options[:index]       = idx
    layer_options[:min_value]   = options[:min_value]
    layer_options[:max_value]   = options[:max_value]
    layer_options[:min_key]     = options[:min_key]
    layer_options[:max_key]     = options[:max_key]
    layer_options[:complexity]  = options[:complexity]
    layer_options[:size]        = [bounds[:width], bounds[:height]]
    layer_options[:color]       = layer.preferred_color || layer.color || options[:theme].next_color
    layer_options[:opacity]     = opacity_for(idx)
    layer_options[:theme]       = options[:theme]

    svg.g(:id => "component_#{id}_graph_#{idx}", :class => 'graph_layer') {
      layer.render(svg, layer_options)
    }
  end # applicable_layers
end