canvas.exs

# my blog  : https://trangell.com/fa/
# public : http://iranonrails.ir
defmodule Canvas do

  @defaults [ fg: "black", bg: "white", font: "Merriweather" ]

  def draw_text(text, options \\ []) do
    options = Keyword.merge(@defaults, options)
    IO.puts "Drawing text #{inspect(text)}"
    IO.puts "Foreground:  #{options[:fg]}"
    IO.puts "Background:  #{Keyword.get(options, :bg)}"
    IO.puts "Font:        #{Keyword.get(options, :font)}"
    IO.puts "Pattern:     #{Keyword.get(options, :pattern, "solid")}"
    IO.puts "Style:       #{inspect Keyword.get_values(options, :style)}"
  end

end

Canvas.draw_text("hello", fg: "red", style: "italic", style: "bold")

#   Drawing text "hello"
#   Foreground:  red
#   Background:  white
#   Font:        Merriweather
#   Pattern:     solid
#   Style:       ["italic", "bold"]