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Contents
# encoding: utf-8
#
# This example is mostly just for fun, and shows how nested bounding boxes
# can simplify calculations. See the "Bounding Box" section of the manual
# for more basic uses.
#
require File.expand_path(File.join(File.dirname(__FILE__),
%w[.. example_helper]))
filename = File.basename(__FILE__).gsub('.rb', '.pdf')
Prawn::Example.generate(filename) do
def combine(a1, a2)
output = []
a1.each do |i1|
a2.each do |i2|
output += [[i1,i2]]
end
end
output
end
def recurse_bounding_box(max_depth=4, depth=1)
width = (bounds.width-15)/2
height = (bounds.height-15)/2
left_top_corners = combine([5, bounds.right-width-5],
[bounds.top-5, height+5])
left_top_corners.each do |lt|
bounding_box(lt, :width => width, :height => height) do
stroke_bounds
recurse_bounding_box(max_depth, depth+1) if depth < max_depth
end
end
end
# Set up a bbox from the dashed line to the bottom of the page
bounding_box([0, cursor], :width => bounds.width, :height => cursor) do
recurse_bounding_box
end
end
Version data entries
8 entries across 8 versions & 2 rubygems