Class: Gruff::Bullet

Inherits:
Base
  • Object
show all
Defined in:
lib/gruff/bullet.rb

Constant Summary

Constants inherited from Base

Gruff::Base::DATA_COLOR_INDEX, Gruff::Base::DATA_LABEL_INDEX, Gruff::Base::DATA_VALUES_INDEX, Gruff::Base::DEBUG, Gruff::Base::DEFAULT_MARGIN, Gruff::Base::DEFAULT_TARGET_WIDTH, Gruff::Base::LABEL_MARGIN, Gruff::Base::LEGEND_MARGIN, Gruff::Base::THOUSAND_SEPARATOR

Instance Attribute Summary

Attributes inherited from Base

#additional_line_values, #bottom_margin, #center_labels_over_point, #colors, #font, #font_color, #has_left_labels, #hide_legend, #hide_line_markers, #hide_line_numbers, #hide_title, #labels, #left_margin, #legend_box_size, #legend_font_size, #legend_margin, #marker_color, #marker_count, #marker_font_size, #maximum_value, #minimum_value, #no_data_message, #right_margin, #sort, #stacked, #title, #title_font_size, #title_margin, #top_margin, #x_axis_label, #y_axis_increment, #y_axis_label

Instance Method Summary collapse

Methods inherited from Base

#add_color, #initialize_ivars, #margins=, #replace_colors, #theme=, #theme_37signals, #theme_greyscale, #theme_keynote, #theme_odeo, #theme_pastel, #theme_rails_keynote, #to_blob, #write

Methods included from Deprecated

#graph_height, #graph_left, #graph_top, #graph_width, #scale_measurements, #total_height

Constructor Details

#initialize(target_width = "400x40") ⇒ Bullet

Returns a new instance of Bullet.



5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
 
# File 'lib/gruff/bullet.rb', line 5

def initialize(target_width="400x40")
  if not Numeric === target_width
    geometric_width, geometric_height = target_width.split('x')
    @columns = geometric_width.to_f
    @rows = geometric_height.to_f
  else
    @columns = target_width.to_f
    @rows = target_width.to_f / 5.0
  end

  initialize_ivars

  reset_themes
  theme_greyscale
  @title_font_size = 20
end

Instance Method Details

#data(value, maximum_value, options = {}) ⇒ Object 



22
23
24
25
26
27
 
# File 'lib/gruff/bullet.rb', line 22

def data(value, maximum_value, options={})
  @value = value.to_f
  @maximum_value = maximum_value.to_f
  @options = options
  @options.map { |k, v| @options[k] = v.to_f if v === Numeric }
end

#draw ⇒ Object

def setup_drawing

# Maybe should be done in one of the following functions for more granularity.
unless @has_data
  draw_no_data()
  return
end

normalize()
setup_graph_measurements()
sort_norm_data() if @sort # Sort norm_data with avg largest values set first (for display)

draw_legend()
draw_line_markers()
draw_axis_labels()
draw_title

end



46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
 
# File 'lib/gruff/bullet.rb', line 46

def draw
  # TODO Left label
  # TODO Bottom labels and markers
  # @graph_bottom
  # Calculations are off 800x???

  @colors.reverse!

  draw_title

  @margin       = 30.0
  @thickness    = @raw_rows / 6.0
  @right_margin = @margin
  @graph_left   = @title_width * 1.3 rescue @margin # HACK Need to calculate real width
  @graph_width  = @raw_columns - @graph_left - @right_margin
  @graph_height = @thickness * 3.0

  # Background
  @d = @d.fill @colors[0]
  @d = @d.rectangle(@graph_left, 0, @graph_left + @graph_width, @graph_height)

  [:high, :low].each_with_index do |indicator, index|
    next unless @options.has_key?(indicator)
    @d = @d.fill @colors[index + 1]
    indicator_width_x  = @graph_left + @graph_width * (@options[indicator] / @maximum_value)
    @d = @d.rectangle(@graph_left, 0, indicator_width_x, @graph_height)
  end

  if @options.has_key?(:target)
    @d = @d.fill @font_color
    target_x = @graph_left + @graph_width * (@options[:target] / @maximum_value)
    half_thickness = @thickness / 2.0
    @d = @d.rectangle(target_x, half_thickness, target_x + half_thickness, @thickness * 2 + half_thickness)
  end

  # Value
  @d = @d.fill @font_color
  @d = @d.rectangle(@graph_left, @thickness, @graph_left + @graph_width * (@value / @maximum_value), @thickness * 2)

  @d.draw(@base_image)
end

#draw_title ⇒ Object 



88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
 
# File 'lib/gruff/bullet.rb', line 88

def draw_title
  return unless @title

  @font_height = calculate_caps_height(scale_fontsize(@title_font_size))
  @title_width = calculate_width(@title_font_size, @title)

  @d.fill        = @font_color
  @d.font        = @font if @font
  @d.stroke('transparent')
  @d.font_weight = NormalWeight
  @d.pointsize   = scale_fontsize(@title_font_size)
  @d.gravity     = NorthWestGravity
  @d             = @d.annotate_scaled(*[
    @base_image,
    1.0, 1.0,
    @font_height/2, @font_height/2,
    @title,
    @scale
  ])
end