Class: DotGrid::Pattern::Checkerboard

Inherits:
Pattern
  • Object
show all
Defined in:
lib/dot_grid/pattern/checkerboard.rb

Instance Attribute Summary

Attributes inherited from Pattern

#bounds, #grid_color, #pdf

Instance Method Summary collapse

Methods inherited from Pattern

#columns, #draw_grid, #initialize, #post_initialize, #rows

Constructor Details

This class inherits a constructor from DotGrid::Pattern::Pattern

Instance Method Details

#draw ⇒ Object 



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# File 'lib/dot_grid/pattern/checkerboard.rb', line 9

def draw
  pdf.fill_color grid_color
  draw_grid do |row, column|
    pdf.fill_rectangle [column*spacing, row*spacing], spacing, spacing if draw_square?(row, column)
  end
end

#draw_square?(row, column) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/dot_grid/pattern/checkerboard.rb', line 5

def draw_square?(row, column)
  (row % 2 == 0 && column % 2 == 0) || (row % 2 == 1 && column % 2 == 1)
end