Class: Gruff::Area
Constant Summary
Constants inherited from Base
Base::DEFAULT_MARGIN, Base::DEFAULT_TARGET_WIDTH, Base::LABEL_MARGIN, Base::LEGEND_MARGIN, Base::THOUSAND_SEPARATOR
Instance Attribute Summary
Attributes inherited from Base
#additional_line_values, #bold_title, #bottom_margin, #center_labels_over_point, #colors, #font, #font_color, #has_left_labels, #hide_legend, #hide_line_markers, #hide_line_numbers, #hide_title, #label_max_size, #label_stagger_height, #label_truncation_style, #labels, #left_margin, #legend_at_bottom, #legend_box_size, #legend_font_size, #legend_margin, #marker_color, #marker_count, #marker_font_size, #marker_shadow_color, #maximum_value, #minimum_value, #no_data_message, #right_margin, #sort, #sorted_drawing, #title, #title_font, #title_font_size, #title_margin, #top_margin, #use_data_label, #x_axis_increment, #x_axis_label, #y_axis_increment, #y_axis_label
Instance Method Summary collapse
Methods inherited from Base
#add_color, #data, #initialize, #margins=, #replace_colors, #theme=, #theme_37signals, #theme_greyscale, #theme_keynote, #theme_odeo, #theme_pastel, #theme_rails_keynote, #to_blob, #write
Constructor Details
This class inherits a constructor from Gruff::Base
Instance Method Details
#draw ⇒ Object
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# File 'lib/gruff/area.rb', line 12 def draw super return unless data_given? x_increment = @graph_width / (column_count - 1).to_f store.norm_data.each do |data_row| poly_points = [] data_row.points.each_with_index do |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) end # Add closing points, draw polygon poly_points << @graph_right poly_points << @graph_bottom - 1 poly_points << @graph_left poly_points << @graph_bottom - 1 Gruff::Renderer::Polygon.new(color: data_row.color).render(poly_points) end Gruff::Renderer.finish end |