# File lib/gruff/net.rb, line 10
10:   def initialize(*args)
11:     super
12:     
13:     @hide_dots = false
14:   end

    # File lib/gruff/net.rb, line 16
16:   def draw
17: 
18:     super
19: 
20:     return unless @has_data
21: 
22:     @radius = @graph_height / 2.0
23:     @center_x = @graph_left + (@graph_width / 2.0)
24:     @center_y = @graph_top + (@graph_height / 2.0) - 10 # Move graph up a bit
25: 
26:     @x_increment = @graph_width / (@column_count - 1).to_f
27:     circle_radius = clip_value_if_greater_than(@columns / (@norm_data.first[1].size * 2.5), 5.0)
28: 
29:     @d = @d.stroke_opacity 1.0
30:     @d = @d.stroke_width clip_value_if_greater_than(@columns / (@norm_data.first[1].size * 4), 5.0)
31: 
32:     if (defined?(@norm_baseline)) then
33:       level = @graph_top + (@graph_height - @norm_baseline * @graph_height)
34:       @d = @d.push
35:       @d.stroke_color @baseline_color
36:       @d.fill_opacity 0.0
37:       @d.stroke_dasharray(10, 20)
38:       @d.stroke_width 5
39:       @d.line(@graph_left, level, @graph_left + @graph_width, level)
40:       @d = @d.pop
41:     end
42: 
43:     @norm_data.each do |data_row|
44:       prev_x = prev_y = nil
45:       @d = @d.stroke data_row[DATA_COLOR_INDEX]
46:       @d = @d.fill data_row[DATA_COLOR_INDEX]
47: 
48:       data_row[1].each_with_index do |data_point, index|
49:         next if data_point.nil?
50: 
51:         rad_pos = index * Math::PI * 2 / @column_count
52:         point_distance = data_point * @radius
53:         start_x = @center_x + Math::sin(rad_pos) * point_distance
54:         start_y = @center_y - Math::cos(rad_pos) * point_distance
55: 
56:         next_index = index + 1 < data_row[1].length ? index + 1 : 0
57: 
58:         next_rad_pos = next_index * Math::PI * 2 / @column_count
59:         next_point_distance = data_row[1][next_index] * @radius
60:         end_x = @center_x + Math::sin(next_rad_pos) * next_point_distance
61:         end_y = @center_y - Math::cos(next_rad_pos) * next_point_distance
62: 
63:         @d = @d.line(start_x, start_y, end_x, end_y)
64: 
65:         @d = @d.circle(start_x, start_y, start_x - circle_radius, start_y) unless @hide_dots
66:       end
67: 
68:     end
69: 
70:     @d.draw(@base_image)
71:   end

     # File lib/gruff/net.rb, line 75
 75:   def draw_line_markers
 76:     return if @hide_line_markers
 77: 
 78: 
 79:     # have to do this here (AGAIN)... see draw() in this class
 80:     # because this funtion is called before the @radius, @center_x and @center_y are set
 81:     @radius = @graph_height / 2.0
 82:     @center_x = @graph_left + (@graph_width / 2.0)
 83:     @center_y = @graph_top + (@graph_height / 2.0) - 10 # Move graph up a bit
 84: 
 85: 
 86:     # Draw horizontal line markers and annotate with numbers
 87:     @d = @d.stroke(@marker_color)
 88:     @d = @d.stroke_width 1
 89: 
 90: 
 91:     (0..@column_count-1).each do |index|
 92:       rad_pos = index * Math::PI * 2 / @column_count
 93: 
 94:       @d = @d.line(@center_x, @center_y, @center_x + Math::sin(rad_pos) * @radius, @center_y - Math::cos(rad_pos) * @radius)
 95: 
 96: 
 97:       marker_label = labels[index] ? labels[index].to_s : '000'
 98: 
 99:       draw_label(@center_x, @center_y, rad_pos * 360 / (2 * Math::PI), @radius, marker_label)
100:     end
101:   end

     # File lib/gruff/net.rb, line 105
105:   def draw_label(center_x, center_y, angle, radius, amount)
106:     r_offset = 1.1
107:     x_offset = center_x # + 15 # The label points need to be tweaked slightly
108:     y_offset = center_y # + 0  # This one doesn't though
109:     x = x_offset + (radius * r_offset * Math.sin(angle.deg2rad))
110:     y = y_offset - (radius * r_offset * Math.cos(angle.deg2rad))
111: 
112:     # Draw label
113:     @d.fill = @marker_color
114:     @d.font = @font if @font
115:     @d.pointsize = scale_fontsize(20)
116:     @d.stroke = 'transparent'
117:     @d.font_weight = BoldWeight
118:     s = angle.deg2rad / (2*Math::PI)
119:     @d.gravity = SouthGravity     if s >= 0.96 or s < 0.04
120:     @d.gravity = SouthWestGravity if s >= 0.04 or s < 0.21
121:     @d.gravity = WestGravity      if s >= 0.21 or s < 0.29
122:     @d.gravity = NorthWestGravity if s >= 0.29 or s < 0.46
123:     @d.gravity = NorthGravity     if s >= 0.46 or s < 0.54
124:     @d.gravity = NorthEastGravity if s >= 0.54 or s < 0.71
125:     @d.gravity = EastGravity      if s >= 0.71 or s < 0.79
126:     @d.gravity = SouthEastGravity if s >= 0.79 or s < 0.96
127: #     @d.gravity = NorthGravity
128:     @d.annotate_scaled(@base_image, 0, 0, x, y, amount, @scale)
129:   end