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#!/usr/bin/env ruby -w
# encoding: UTF-8
#
# = GanttLoadStack.rb -- The TaskJuggler III Project Management Software
#
# Copyright (c) 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014
# by Chris Schlaeger <cs@taskjuggler.org>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of version 2 of the GNU General Public License as
# published by the Free Software Foundation.
#
require 'taskjuggler/reports/HTMLGraphics'
class TaskJuggler
# The GanttLoadStack is a simple stack diagram that shows the relative shares
# of the values. The stack is always normed to the line height.
class GanttLoadStack
include HTMLGraphics
# Create a GanttLoadStack object based on the following information: _line_
# is a reference to the GanttLine. _x_ is the left edge in chart coordinates
# and _w_ is the stack width. _values_ are the values to be displayed and
# _categories_ determines the color for each of the values.
def initialize(line, x, w, values, categories)
@line = line
@lineHeight = line.height
@x = x
@y = @line.y
@w = w <= 0 ? 1 : w
@drawFrame = false
if values.length != categories.length
raise "Values and categories must have the same number of entries!"
end
@categories = categories
i = 0
@categories.each do |cat|
if cat.nil? && values[i] > 0
@drawFrame = true
break
end
i += 1
end
# Convert the values to chart Y coordinates and store them in yLevels.
sum = 0
values.each { |v| sum += v }
# If the sum is 0, all yLevels values must be 0 as well.
if sum == 0
@yLevels = nil
@drawFrame = true
else
@yLevels = []
values.each do |v|
# We leave 1 pixel to the top and bottom of the line and need 1 pixel
# for the frame.
@yLevels << (@lineHeight - 4) * v / sum
end
end
end
def addBlockedZones(router)
# Horizontal block
router.addZone(@x - 2, @y, @w + 4, @lineHeight, true, false)
end
# Convert the abstact representation of the GanttLoadStack into HTML
# elements.
def to_html
# Draw nothing if all values are 0.
return nil unless @yLevels
html = []
# Draw a background rectable to create a frame. In case the frame is not
# fully filled by the stack, we need to draw a real frame to keep the
# background.
if @drawFrame
# Top frame line
html << @line.lineToHTML(@x, 1, @x + @w - 1, 1, 'loadstackframe')
# Bottom frame line
html << @line.lineToHTML(@x, @lineHeight - 2, @x + @w - 1,
@lineHeight - 2, 'loadstackframe')
# Left frame line
html << @line.lineToHTML(@x, 1, @x, @lineHeight - 2, 'loadstackframe')
# Right frame line
html << @line.lineToHTML(@x + @w - 1, 1, @x + @w - 1, @lineHeight - 2,
'loadstackframe')
else
html << @line.rectToHTML(@x, 1, @w, @lineHeight - 2,
'loadstackframe')
end
yPos = 2
# Than draw the slighly narrower bars as a pile ontop of it.
(@yLevels.length - 1).downto(0) do |i|
next if @yLevels[i] <= 0
if @categories[i]
html << @line.rectToHTML(@x + 1, yPos.to_i, @w - 2,
(yPos + @yLevels[i]).to_i - yPos.to_i,
@categories[i])
end
yPos += @yLevels[i]
end
html
end
end
end
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