TaskJuggler::GanttLoadStack

    # File lib/reports/GanttLoadStack.rb, line 27
27:     def initialize(line, x, w, values, categories)
28:       @line = line
29:       @lineHeight = line.height
30:       @x = x
31:       @y = @line.y
32:       @w = w
33:       @drawFrame = false
34:       if values.length != categories.length
35:         raise "Values and categories must have the same number of entries!"
36:       end
37:       @categories = categories
38:       i = 0
39:       @categories.each do |cat|
40:         if cat.nil? && values[i] > 0
41:           @drawFrame = true
42:           break
43:         end
44:         i += 1
45:       end
46: 
47:       # Convert the values to chart Y coordinates and store them in yLevels.
48:       sum = 0
49:       values.each { |v| sum += v }
50:       # If the sum is 0, all yLevels values must be 0 as well.
51:       if sum == 0
52:         @yLevels = nil
53:         @drawFrame = true
54:       else
55:         @yLevels = []
56:         values.each do |v|
57:           # We leave 1 pixel to the top and bottom of the line and need 1 pixel
58:           # for the frame.
59:           @yLevels << (@lineHeight - 4) * v / sum
60:         end
61:       end
62:     end

    # File lib/reports/GanttLoadStack.rb, line 64
64:     def addBlockedZones(router)
65:       # Horizontal block
66:       router.addZone(@x - 2, @y, @w + 4, @lineHeight, true, false)
67:     end

     # File lib/reports/GanttLoadStack.rb, line 71
 71:     def to_html
 72:       # Draw nothing if all values are 0.
 73:       return nil unless @yLevels
 74: 
 75:       html = []
 76:       # Draw a background rectable to create a frame. In case the frame is not
 77:       # fully filled by the stack, we need to draw a real frame to keep the
 78:       # background.
 79:       if @drawFrame
 80:         # Top frame line
 81:         html << @line.lineToHTML(@x, 1, @x + @w - 1, 1, 'loadstackframe')
 82:         # Bottom frame line
 83:         html << @line.lineToHTML(@x, @lineHeight - 2, @x + @w - 1,
 84:                                  @lineHeight - 2, 'loadstackframe')
 85:         # Left frame line
 86:         html << @line.lineToHTML(@x, 1, @x, @lineHeight - 2, 'loadstackframe')
 87:         # Right frame line
 88:         html << @line.lineToHTML(@x + @w - 1, 1, @x + @w - 1, @lineHeight - 2,
 89:                                  'loadstackframe')
 90:       else
 91:         html << @line.rectToHTML(@x, 1, @w, @lineHeight - 2,
 92:                                  'loadstackframe')
 93:       end
 94: 
 95:       yPos = 2
 96:       # Than draw the slighly narrower bars as a pile ontop of it.
 97:       (@yLevels.length - 1).downto(0) do |i|
 98:         next if @yLevels[i] <= 0
 99:         if @categories[i]
100:           html << @line.rectToHTML(@x + 1, yPos.to_i, @w - 2,
101:                                    (yPos + @yLevels[i]).to_i - yPos.to_i,
102:                                    @categories[i])
103:         end
104:         yPos += @yLevels[i]
105:       end
106: 
107:       html
108:     end