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# Redmine - project management software
# Copyright (C) 2006-2008 Jean-Philippe Lang
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
module Redmine
module Helpers
# Simple class to handle gantt chart data
class Gantt
attr_reader :year_from, :month_from, :date_from, :date_to, :zoom, :months, :events
def initialize(options={})
options = options.dup
@events = []
if options[:year] && options[:year].to_i >0
@year_from = options[:year].to_i
if options[:month] && options[:month].to_i >=1 && options[:month].to_i <= 12
@month_from = options[:month].to_i
else
@month_from = 1
end
else
@month_from ||= Date.today.month
@year_from ||= Date.today.year
end
zoom = (options[:zoom] || User.current.pref[:gantt_zoom]).to_i
@zoom = (zoom > 0 && zoom < 5) ? zoom : 2
months = (options[:months] || User.current.pref[:gantt_months]).to_i
@months = (months > 0 && months < 25) ? months : 6
# Save gantt parameters as user preference (zoom and months count)
if (User.current.logged? && (@zoom != User.current.pref[:gantt_zoom] || @months != User.current.pref[:gantt_months]))
User.current.pref[:gantt_zoom], User.current.pref[:gantt_months] = @zoom, @months
User.current.preference.save
end
@date_from = Date.civil(@year_from, @month_from, 1)
@date_to = (@date_from >> @months) - 1
end
def events=(e)
@events = e.sort {|x,y| x.start_date <=> y.start_date }
end
def params
{ :zoom => zoom, :year => year_from, :month => month_from, :months => months }
end
def params_previous
{ :year => (date_from << months).year, :month => (date_from << months).month, :zoom => zoom, :months => months }
end
def params_next
{ :year => (date_from >> months).year, :month => (date_from >> months).month, :zoom => zoom, :months => months }
end
# Generates a gantt image
# Only defined if RMagick is avalaible
def to_image(format='PNG')
date_to = (@date_from >> @months)-1
show_weeks = @zoom > 1
show_days = @zoom > 2
subject_width = 320
header_heigth = 18
# width of one day in pixels
zoom = @zoom*2
g_width = (@date_to - @date_from + 1)*zoom
g_height = 20 * events.length + 20
headers_heigth = (show_weeks ? 2*header_heigth : header_heigth)
height = g_height + headers_heigth
imgl = Magick::ImageList.new
imgl.new_image(subject_width+g_width+1, height)
gc = Magick::Draw.new
# Subjects
top = headers_heigth + 20
gc.fill('black')
gc.stroke('transparent')
gc.stroke_width(1)
events.each do |i|
gc.text(4, top + 2, (i.is_a?(Issue) ? i.subject : i.name))
top = top + 20
end
# Months headers
month_f = @date_from
left = subject_width
@months.times do
width = ((month_f >> 1) - month_f) * zoom
gc.fill('white')
gc.stroke('grey')
gc.stroke_width(1)
gc.rectangle(left, 0, left + width, height)
gc.fill('black')
gc.stroke('transparent')
gc.stroke_width(1)
gc.text(left.round + 8, 14, "#{month_f.year}-#{month_f.month}")
left = left + width
month_f = month_f >> 1
end
# Weeks headers
if show_weeks
left = subject_width
height = header_heigth
if @date_from.cwday == 1
# date_from is monday
week_f = date_from
else
# find next monday after date_from
week_f = @date_from + (7 - @date_from.cwday + 1)
width = (7 - @date_from.cwday + 1) * zoom
gc.fill('white')
gc.stroke('grey')
gc.stroke_width(1)
gc.rectangle(left, header_heigth, left + width, 2*header_heigth + g_height-1)
left = left + width
end
while week_f <= date_to
width = (week_f + 6 <= date_to) ? 7 * zoom : (date_to - week_f + 1) * zoom
gc.fill('white')
gc.stroke('grey')
gc.stroke_width(1)
gc.rectangle(left.round, header_heigth, left.round + width, 2*header_heigth + g_height-1)
gc.fill('black')
gc.stroke('transparent')
gc.stroke_width(1)
gc.text(left.round + 2, header_heigth + 14, week_f.cweek.to_s)
left = left + width
week_f = week_f+7
end
end
# Days details (week-end in grey)
if show_days
left = subject_width
height = g_height + header_heigth - 1
wday = @date_from.cwday
(date_to - @date_from + 1).to_i.times do
width = zoom
gc.fill(wday == 6 || wday == 7 ? '#eee' : 'white')
gc.stroke('grey')
gc.stroke_width(1)
gc.rectangle(left, 2*header_heigth, left + width, 2*header_heigth + g_height-1)
left = left + width
wday = wday + 1
wday = 1 if wday > 7
end
end
# border
gc.fill('transparent')
gc.stroke('grey')
gc.stroke_width(1)
gc.rectangle(0, 0, subject_width+g_width, headers_heigth)
gc.stroke('black')
gc.rectangle(0, 0, subject_width+g_width, g_height+ headers_heigth-1)
# content
top = headers_heigth + 20
gc.stroke('transparent')
events.each do |i|
if i.is_a?(Issue)
i_start_date = (i.start_date >= @date_from ? i.start_date : @date_from )
i_end_date = (i.due_before <= date_to ? i.due_before : date_to )
i_done_date = i.start_date + ((i.due_before - i.start_date+1)*i.done_ratio/100).floor
i_done_date = (i_done_date <= @date_from ? @date_from : i_done_date )
i_done_date = (i_done_date >= date_to ? date_to : i_done_date )
i_late_date = [i_end_date, Date.today].min if i_start_date < Date.today
i_left = subject_width + ((i_start_date - @date_from)*zoom).floor
i_width = ((i_end_date - i_start_date + 1)*zoom).floor # total width of the issue
d_width = ((i_done_date - i_start_date)*zoom).floor # done width
l_width = i_late_date ? ((i_late_date - i_start_date+1)*zoom).floor : 0 # delay width
gc.fill('grey')
gc.rectangle(i_left, top, i_left + i_width, top - 6)
gc.fill('red')
gc.rectangle(i_left, top, i_left + l_width, top - 6) if l_width > 0
gc.fill('blue')
gc.rectangle(i_left, top, i_left + d_width, top - 6) if d_width > 0
gc.fill('black')
gc.text(i_left + i_width + 5,top + 1, "#{i.status.name} #{i.done_ratio}%")
else
i_left = subject_width + ((i.start_date - @date_from)*zoom).floor
gc.fill('green')
gc.rectangle(i_left, top, i_left + 6, top - 6)
gc.fill('black')
gc.text(i_left + 11, top + 1, i.name)
end
top = top + 20
end
# today red line
if Date.today >= @date_from and Date.today <= date_to
gc.stroke('red')
x = (Date.today-@date_from+1)*zoom + subject_width
gc.line(x, headers_heigth, x, headers_heigth + g_height-1)
end
gc.draw(imgl)
imgl.format = format
imgl.to_blob
end if Object.const_defined?(:Magick)
end
end
end
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