Class: Prawn::Document::Box

Inherits:
Object
  • Object
show all
Defined in:
lib/prawn/layout/grid.rb

Overview

A Box is a class that represents a bounded area of a page.

A Grid object has methods that allow easy access to the coordinates of its corners, which can be plugged into most existing prawnmethods.

Direct Known Subclasses

MultiBox

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(pdf, i, j) ⇒ Box

Returns a new instance of Box.



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# File 'lib/prawn/layout/grid.rb', line 92

def initialize(pdf, i, j)
  @pdf = pdf
  @i = i
  @j = j
end

Instance Attribute Details

#pdf ⇒ Object (readonly)

:nodoc:



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# File 'lib/prawn/layout/grid.rb', line 90

def pdf
  @pdf
end

Instance Method Details

#bottom ⇒ Object

y-coordinate of the bottom



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# File 'lib/prawn/layout/grid.rb', line 141

def bottom
  @bottom ||= top - height
end

#bottom_left ⇒ Object

x,y coordinates of bottom left corner



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# File 'lib/prawn/layout/grid.rb', line 156

def bottom_left
  [left, bottom]
end

#bottom_right ⇒ Object

x,y coordinates of bottom right corner



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# File 'lib/prawn/layout/grid.rb', line 161

def bottom_right
  [right, bottom]
end

#bounding_box(&blk) ⇒ Object

Creates a standard bounding box based on the grid box.



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# File 'lib/prawn/layout/grid.rb', line 166

def bounding_box(&blk)
  pdf.bounding_box(top_left, :width => width, :height => height, &blk)
end

#gutter ⇒ Object

Width of the gutter



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# File 'lib/prawn/layout/grid.rb', line 121

def gutter
  grid.gutter.to_f
end

#height ⇒ Object

Height of a box



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# File 'lib/prawn/layout/grid.rb', line 116

def height
  grid.row_height.to_f
end

#left ⇒ Object

x-coordinate of left side



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# File 'lib/prawn/layout/grid.rb', line 126

def left
  @left ||= (width + grid.column_gutter) * @j.to_f
end

#name ⇒ Object

Mostly diagnostic method that outputs the name of a box as col_num, row_num



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# File 'lib/prawn/layout/grid.rb', line 101

def name
  "#{@i.to_s},#{@j.to_s}"
end

#right ⇒ Object

x-coordinate of right side



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# File 'lib/prawn/layout/grid.rb', line 131

def right
  @right ||= left + width
end

#show(grid_color = "CCCCCC") ⇒ Object

Diagnostic method



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# File 'lib/prawn/layout/grid.rb', line 171

def show(grid_color = "CCCCCC")
  self.bounding_box do
    original_stroke_color = pdf.stroke_color

    pdf.stroke_color = grid_color
    pdf.text self.name
    pdf.stroke_bounds
    
    pdf.stroke_color = original_stroke_color
  end
end

#top ⇒ Object

y-coordinate of the top



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# File 'lib/prawn/layout/grid.rb', line 136

def top
  @top ||= total_height - ((height + grid.row_gutter) * @i.to_f)
end

#top_left ⇒ Object

x,y coordinates of top left corner



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# File 'lib/prawn/layout/grid.rb', line 146

def top_left
  [left, top]
end

#top_right ⇒ Object

x,y coordinates of top right corner



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# File 'lib/prawn/layout/grid.rb', line 151

def top_right
  [right, top]
end

#total_height ⇒ Object

:nodoc



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# File 'lib/prawn/layout/grid.rb', line 106

def total_height
  pdf.bounds.height.to_f
end

#width ⇒ Object

Width of a box



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# File 'lib/prawn/layout/grid.rb', line 111

def width
  grid.column_width.to_f
end