TaskJuggler::GanttLoadStack

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

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

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