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# 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_relative '../example_helper'
filename = File.basename(__FILE__).gsub('.rb', '.pdf')
Prawn::ManualBuilder::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
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