Class: GraphViz::Attrs

Inherits:
Object show all
Defined in:
lib/graphviz/attrs.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(gviz, name, attributes) ⇒ Attrs

Returns a new instance of Attrs.



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# File 'lib/graphviz/attrs.rb', line 24

def initialize( gviz, name, attributes )
   @name       = name
   @attributes = attributes
   @data       = Hash::new( )
   @graphviz   = gviz
end

Instance Attribute Details

#data ⇒ Object

Returns the value of attribute data.



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# File 'lib/graphviz/attrs.rb', line 22

def data
  @data
end

Instance Method Details

#[](key) ⇒ Object 



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# File 'lib/graphviz/attrs.rb', line 41

def []( key )
   if key.class == Hash
      key.each do |k, v|
         self[k] = v
      end
   else
      @data[key.to_s]
   end
end

#[]=(key, value) ⇒ Object 



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# File 'lib/graphviz/attrs.rb', line 51

def []=( key, value )
   unless @attributes.keys.include?( key.to_s )
      raise ArgumentError, "#{@name} attribute '#{key.to_s}' invalid"
   end

   if value.nil?
      warn "Value for attribute `#{key}` can't be null"
      return
   end

   begin
      value = GraphViz::Types.const_get(@attributes[key.to_s]).new(value)
   rescue => e
      raise AttributeException, "Invalid value `#{value}` for attribute `#{key}` : #{e}"
   end

   if value
     @data[key.to_s] = value
     @graphviz.set_position( @name, key.to_s, @data[key.to_s] ) if @graphviz
   end
end

#each ⇒ Object 



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# File 'lib/graphviz/attrs.rb', line 31

def each
   @data.each do |k, v|
      yield(k, v)
   end
end

#to_h ⇒ Object 



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# File 'lib/graphviz/attrs.rb', line 37

def to_h
   @data.clone
end