Contents

# encoding: utf-8
#
# This transformation is used to scale the user space. Give it an scale factor
# and an <code>:origin</code> point and everything inside the block will be
# scaled using the origin point as reference.
#
# If you omit the <code>:origin</code> option the page origin will be used.
#
require File.expand_path(File.join(File.dirname(__FILE__),
                                   %w[.. example_helper]))

filename = File.basename(__FILE__).gsub('.rb', '.pdf')
Prawn::ManualBuilder::Example.generate(filename) do
  stroke_axis

  width = 100
  height = 50

  x = 50
  y = 200

  stroke_rectangle [x, y], width, height
  text_box "reference rectangle", :at => [x + 10, y - 10], :width => width - 20

  scale(2, :origin => [x, y]) do
    stroke_rectangle [x, y], width, height
    text_box "rectangle scaled from upper-left corner",
             :at => [x, y - height - 5],
             :width => width
  end

  x = 350

  stroke_rectangle [x, y], width, height
  text_box "reference rectangle", :at => [x + 10, y - 10], :width => width - 20

  scale(2, :origin => [x + width / 2, y - height / 2]) do
    stroke_rectangle [x, y], width, height
    text_box "rectangle scaled from center",
             :at => [x, y - height - 5],
             :width => width
  end
end

Version data entries

2 entries across 2 versions & 1 rubygems

Version	Path
prawn-2.1.0	manual/graphics/scale.rb
prawn-2.0.2	manual/graphics/scale.rb