Method: Wee::Brush::SelectListTag#__callback

Defined in:
lib/wee/html_brushes.rb

#__callback ⇒ Object 



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# File 'lib/wee/html_brushes.rb', line 552

def __callback
  #
  # A callback was specified. We have to wrap it inside another
  # callback, as we want to perform some additional actions.
  #
  name(@canvas.register_callback(:input, proc {|input|
    input = [input] unless input.kind_of?(Array)
    choosen = input.map {|idx| get_item(idx) }

    if @attributes.has_key?(:multiple)
      @callback.call(choosen)
    elsif choosen.size > 1
      raise "more than one element was choosen from a not-multiple SelectListTag" 
    else
      @callback.call(choosen.first)
    end
  }))
end