Prawn::Chart::Grid represents the area whcih your data will be plotted. It is drawn before your data is plotted and serves to mark where the axes of your plot will be and to give an indication of scale.
# File lib/prawn/graph/grid.rb, line 12 def initialize(grid_x_start, grid_y_start, grid_width, grid_height, spacing, document, theme) @point = [grid_x_start, grid_y_start] @width = grid_width @height = grid_height @spacing = spacing @document = document @theme = theme end
Draws the Grid on the specified Prawn::Document
# File lib/prawn/graph/grid.rb, line 26 def draw @document.stroke_color @theme.marker_colour if @theme.stroke_grid_markers? (@height / @spacing).times do |x| offset = @spacing * (x + 1) @document.move_to [@point.first, (@point.last + offset)] @document.line_width(0.5) @document.stroke_line_to([(@point.first + @width), (@point.last + offset)]) end end @document.move_to @point @document.line_width(2) @document.stroke_line_to([@point.first, @point.last + @height]) @document.move_to @point @document.line_width(2) @document.stroke_line_to([(@point.first + @width), @point.last]) @document.move_to @point.first, (@point.last + height) @document.stroke_color '000000' @document.line_width(1) @document.move_to @point end
Generated with the Darkfish Rdoc Generator 2.