Class: GoogleChart::AbstractChart

Inherits:
Object
  • Object
show all
Defined in:
lib/google_chart/abstract_chart.rb

Direct Known Subclasses

BarChart, LineChart

Constant Summary collapse

@@base_url = 
'http://chart.apis.google.com/chart'
@@default_size = 
'600x500'

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) {|_self| ... } ⇒ AbstractChart

Returns a new instance of AbstractChart.

Yields:

  • (_self)

Yield Parameters:



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# File 'lib/google_chart/abstract_chart.rb', line 6

def initialize(options = {})
  options.each {|key, value| send("#{key}=", value) }
  yield self if block_given?
end

Instance Attribute Details

#size ⇒ Object 



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# File 'lib/google_chart/abstract_chart.rb', line 17

def size
  @size ||= @@default_size
  "chs=#{@size}"
end

Class Method Details

.inherited(klass) ⇒ Object 



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# File 'lib/google_chart/abstract_chart.rb', line 22

def self.inherited(klass)
  klass.class_eval do
    class_variable_set(:@@parameters, [])
    register!(:chart_type, :size)
  end
end

.register!(*parameters) ⇒ Object 



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# File 'lib/google_chart/abstract_chart.rb', line 29

def self.register!(*parameters)
  parameters.each do |parameter|
    registry.push(parameter) unless registered?(parameter)
  end
end

.registered?(parameter) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/google_chart/abstract_chart.rb', line 35

def self.registered?(parameter)
  registry.include?(parameter)
end

.registry ⇒ Object 



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# File 'lib/google_chart/abstract_chart.rb', line 39

def self.registry
  class_variable_get :@@parameters
end

Instance Method Details

#to_url ⇒ Object 



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# File 'lib/google_chart/abstract_chart.rb', line 11

def to_url
  "#{@@base_url}?#{query_string}"
end