Class: Laser::Cutter::PageManager

Inherits:
Struct
  • Object
show all
Defined in:
lib/laser-cutter/page_manager.rb

Constant Summary collapse

SIZES = 
PDF::Core::PageGeometry::SIZES.clone.freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#units ⇒ Object

Returns the value of attribute units

Returns:

  • (Object) —

    the current value of units



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# File 'lib/laser-cutter/page_manager.rb', line 5

def units
  @units
end

Instance Method Details

#all_page_sizes ⇒ Object 



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# File 'lib/laser-cutter/page_manager.rb', line 8

def all_page_sizes
  output = ""
  page_size_values.each do |k|
    output << sprintf("\t%10s:\t%6.1f x %6.1f\n", *k)
  end
  output
end

#page_size_values ⇒ Object 



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# File 'lib/laser-cutter/page_manager.rb', line 35

def page_size_values
  h = SIZES
  array = []
  h.keys.sort.each do |k|
    array << [k, value_from_units(h[k][0].to_f), value_from_units(h[k][1].to_f)]
  end
  array
end

#value_from_units(value, from_units = nil) ⇒ Object

if from_units is nil, we expect it to be in dots per inch (default measurements for Prawn



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# File 'lib/laser-cutter/page_manager.rb', line 18

def value_from_units value, from_units = nil
  multiplier = if from_units.nil?
                 if units.eql?('in')
                   1.0 / 72.0 # PDF units per inch
                 else
                   25.4 * 1.0 / 72.0
                 end
               elsif self.units.eql?(from_units)
                 1.0
               elsif self.units.eql?('in') && from_units.eql?('mm')
                 (1.0 / 25.4)
               else
                 25.4
               end
  value.to_f * multiplier
end