class ImageParadise::Gruff::Area
Public Class Methods
Public Instance Methods
draw()
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Calls superclass method
ImageParadise::Gruff::Base#draw
# File lib/image_paradise/graphs/area.rb, line 32 def draw super return unless @has_data @x_increment = @graph_width / (@column_count - 1).to_f @d = @d.stroke('transparent') @norm_data.each { |data_row| poly_points = Array.new _prev_x = prev_y = 0.0 @d = @d.fill data_row[DATA_COLOR_INDEX] data_row[DATA_VALUES_INDEX].each_with_index { |data_point, index| # Use incremented x and scaled y new_x = @graph_left + (@x_increment * index) new_y = @graph_top + (@graph_height - data_point * @graph_height) poly_points << new_x poly_points << new_y draw_label(new_x, index) _prev_x = new_x _prev_y = new_y } # ===================================================================== # # Add closing points, draw polygon # ===================================================================== # poly_points << @graph_right poly_points << @graph_bottom - 1 poly_points << @graph_left poly_points << @graph_bottom - 1 @d = @d.polyline(*poly_points) } @d.draw(@base_image) end