Class: Gruff::Net
Overview
Experimental!!! See also the Spider graph.
Constant Summary
Constants inherited from Base
Base::DATA_COLOR_INDEX, Base::DATA_LABEL_INDEX, Base::DATA_VALUES_INDEX, Base::DEBUG, Base::LEGEND_MARGIN, Base::TOP_MARGIN
Constants included from Magick
Magick::BoldWeight, Magick::CenterGravity, Magick::EastGravity, Magick::NormalWeight, Magick::NorthEastGravity, Magick::NorthGravity, Magick::NorthWestGravity, Magick::SouthEastGravity, Magick::SouthGravity, Magick::SouthWestGravity, Magick::WestGravity
Instance Attribute Summary
Attributes inherited from Base
#additional_line_values, #colors, #font, #hide_legend, #hide_line_markers, #hide_title, #labels, #legend_font_size, #marker_color, #marker_count, #marker_font_size, #maximum_value, #minimum_value, #no_data_message, #stacked, #title, #title_font_size, #x_axis_label, #y_axis_increment, #y_axis_label
Instance Method Summary collapse
- #draw ⇒ Object
-
#draw_line_markers ⇒ Object
the lines connecting in the center, with the first line vertical.
Methods inherited from Base
#add_color, #data, #initialize, #replace_colors, #theme=, #theme_37signals, #theme_keynote, #theme_odeo, #theme_rails_keynote, #to_blob, #write
Methods included from Deprecated
#graph_height, #graph_left, #graph_top, #graph_width, #scale_measurements, #total_height
Constructor Details
This class inherits a constructor from Gruff::Base
Instance Method Details
#draw ⇒ Object
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# File 'lib/gruff/net.rb', line 7 def draw super return unless @has_data @radius = @graph_height / 2.0 @center_x = @graph_left + (@graph_width / 2.0) @center_y = @graph_top + (@graph_height / 2.0) - 10 # Move graph up a bit @x_increment = @graph_width / (@column_count - 1).to_f circle_radius = clip_value_if_greater_than(@columns / (@norm_data.first[1].size * 2.5), 5.0) @d = @d.stroke_opacity 1.0 @d = @d.stroke_width clip_value_if_greater_than(@columns / (@norm_data.first[1].size * 4), 5.0) if (defined?(@norm_baseline)) then level = @graph_top + (@graph_height - @norm_baseline * @graph_height) @d = @d.push @d.stroke_color @baseline_color @d.fill_opacity 0.0 @d.stroke_dasharray(10, 20) @d.stroke_width 5 @d.line(@graph_left, level, @graph_left + @graph_width, level) @d = @d.pop end @norm_data.each do |data_row| prev_x = prev_y = nil @d = @d.stroke data_row[DATA_COLOR_INDEX] @d = @d.fill data_row[DATA_COLOR_INDEX] data_row[1].each_with_index do |data_point, index| next if data_point.nil? rad_pos = index * Math::PI * 2 / @column_count point_distance = data_point * @radius start_x = @center_x + Math::sin(rad_pos) * point_distance start_y = @center_y - Math::cos(rad_pos) * point_distance next_index = index + 1 < data_row[1].length ? index + 1 : 0 next_rad_pos = next_index * Math::PI * 2 / @column_count next_point_distance = data_row[1][next_index] * @radius end_x = @center_x + Math::sin(next_rad_pos) * next_point_distance end_y = @center_y - Math::cos(next_rad_pos) * next_point_distance @d = @d.line(start_x, start_y, end_x, end_y) @d = @d.circle(start_x, start_y, start_x - circle_radius, start_y) unless @hide_dots end end @d.draw(@base_image) end |
#draw_line_markers ⇒ Object
the lines connecting in the center, with the first line vertical
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# File 'lib/gruff/net.rb', line 66 def draw_line_markers return if @hide_line_markers # have to do this here (AGAIN)... see draw() in this class # because this funtion is called before the @radius, @center_x and @center_y are set @radius = @graph_height / 2.0 @center_x = @graph_left + (@graph_width / 2.0) @center_y = @graph_top + (@graph_height / 2.0) - 10 # Move graph up a bit # Draw horizontal line markers and annotate with numbers @d = @d.stroke(@marker_color) @d = @d.stroke_width 1 (0..@column_count-1).each do |index| rad_pos = index * Math::PI * 2 / @column_count @d = @d.line(@center_x, @center_y, @center_x + Math::sin(rad_pos) * @radius, @center_y - Math::cos(rad_pos) * @radius) marker_label = labels[index] ? labels[index].to_s : '000' draw_label(@center_x, @center_y, rad_pos * 360 / (2 * Math::PI), @radius, marker_label) end end |