# File lib/gruff/area.rb, line 6 6: def draw 7: super 8: 9: return unless @has_data 10: 11: @x_increment = @graph_width / (@column_count - 1).to_f 12: @d = @d.stroke 'transparent' 13: 14: @norm_data.each do |data_row| 15: poly_points = Array.new 16: prev_x = prev_y = 0.0 17: @d = @d.fill data_row[DATA_COLOR_INDEX] 18: 19: data_row[DATA_VALUES_INDEX].each_with_index do |data_point, index| 20: # Use incremented x and scaled y 21: new_x = @graph_left + (@x_increment * index) 22: new_y = @graph_top + (@graph_height - data_point * @graph_height) 23: 24: if prev_x > 0 and prev_y > 0 then 25: poly_points << new_x 26: poly_points << new_y 27: 28: #@d = @d.polyline(prev_x, prev_y, new_x, new_y) 29: else 30: poly_points << @graph_left 31: poly_points << @graph_bottom - 1 32: poly_points << new_x 33: poly_points << new_y 34: 35: #@d = @d.polyline(@graph_left, @graph_bottom, new_x, new_y) 36: end 37: 38: draw_label(new_x, index) 39: 40: prev_x = new_x 41: prev_y = new_y 42: end 43: 44: # Add closing points, draw polygon 45: poly_points << @graph_right 46: poly_points << @graph_bottom - 1 47: poly_points << @graph_left 48: poly_points << @graph_bottom - 1 49: 50: @d = @d.polyline(*poly_points) 51: 52: end 53: 54: @d.draw(@base_image) 55: end
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