Prawn:Icon How can i set position of icon?

[Avada Kedavra]

I used 

text_box("#{@worker.email}", at: [400, 700], :inline_format => true)

but it's not work. Pls help me. Tks for any help 

[Avada Kedavra]

Edit:

Vào 15:28:42 UTC+7 Thứ Năm, ngày 06 tháng 10 năm 2016, Avada Kedavra đã viết:

I used 

text_box(icon('fa-envelope'), at: [400, 700], :inline_format => true)

[jdo...@ualberta.ca]

Sorry, I messed up my previous post.

Hi, I'm the author of Prawn::Icon!

I haven't been using Prawn myself recently, so I might be rusty.

You should be able to use a bounding box to position arbitrary elements:

Prawn::Document.generate('test.pdf') do |pdf|
  pdf.bounding_box([400, 700], height: 50, width: 50) do
    pdf.icon 'fa-envelope', valign: :center, align: :center
    pdf.stroke_bounds # if you want to visualize the box
  end
end

I hope this helps!