PRAWN: ImageTable

mock_image_table_prawn.rb

# As you may have noticed Prawn does not currently support images in table cells.  
# There is an unofficial fork with initial table image support but it appears that 
# it will be some time before this gets merged into the official branch.
#
# Instead of using an unofficial branch, I found a nice way to do a mock table with 
# image support.  You just need to keep track of your page breaks.

# size values
cell_width = 90
row_height = 80

# Build an array with your table data
pieces = @pieces_to_report.map do |piece|
  [
    piece.image.url(:thumb),
    piece.name,
    piece.inventory_number,
    piece.medium,
    piece.size_str,
    number_to_currency(piece.price, :unit => "$")
  ]
end

# Column Header Values
header = ['', 'Name', 'Inv #', 'Medium','Size', 'Price'] 
pdf.bounding_box [0, pdf.cursor], :width => 500, :height => 20 do
  header.each_with_index do |head,i|
    pdf.bounding_box [cell_width*i,0], :width => cell_width do
      pdf.text head, :size => 10
    end
  end
end

pdf.move_down 15

# Build the Mock Table
pieces.each_with_index do |p,i|
  pdf.bounding_box [0, pdf.cursor], :height => row_height, :width => 500 do
    pdf.stroke do
      pdf.line pdf.bounds.top_left,    pdf.bounds.top_right
      pdf.line pdf.bounds.bottom_left, pdf.bounds.bottom_right
    end
    pdf.move_down 5 # a bit of padding
    cursor = pdf.cursor # keep current cursor value for all cells in this row
    p.each_with_index do |v, j|
      pdf.bounding_box [cell_width*j, cursor], :height => row_height, :width => cell_width do
        if j == 0 # handle image column
          # might want logic here to handle empty/nil images
          pdf.image open(v), :scale => 0.6
        else
          pdf.text v, :size => 10 unless v.blank?
        end
      end
    end
  end

  # create a new page every 5 rows  
  pdf.start_new_page if i > 0 && i % 5 = 0
 
end