Class: GraphViz::Attrs

Inherits:

Object

• Object
• GraphViz::Attrs

show all

Defined in:

lib/graphviz/attrs.rb

Instance Attribute Summary (collapse)

• - (Object) data

  Returns the value of attribute data.

Instance Method Summary (collapse)

• - (Object) [](key)
• - (Object) []=(key, value)
• - (Object) each
• - (Attrs) initialize(gviz, name, attributes) constructor

  A new instance of Attrs.

• - (Object) to_h

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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

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

def data
  @data
end

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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

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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

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

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

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

def to_h
   @data.clone
end