prawn：Prawn::Document::MultiBox#name, #total_height, #width, #height, #gutter, #left, #right, #top, #bottom

#!/usr/bin/env ruby

require "prawn"
require "prawn/layout"

pdf = Prawn::Document.new
pdf.define_grid(:columns => 3, :rows => 2, :gutter => 10)

mb = pdf.grid([0, 0], [0, 1])
p mb.name
p mb.total_height
p mb.width
p mb.height
p mb.gutter
p mb.left
p mb.right
p mb.top
p mb.bottom

で、

"0,0:0,1"
720.0
356.666666666667
355.0
10.0
0.0
356.666666666667
720.0
365.0