Class: Redmine::Helpers::Gantt

Inherits:
Object
  • Object
show all
Includes:
ERB::Util, I18n, Utils::DateCalculation
Defined in:
lib/redmine/helpers/gantt.rb

Overview

Simple class to handle gantt chart data

Defined Under Namespace

Classes: MaxLinesLimitReached, PDF

Constant Summary collapse

DRAW_TYPES =

Relation types that are rendered

{
  IssueRelation::TYPE_BLOCKS   => { :landscape_margin => 16, :color => '#F34F4F' },
  IssueRelation::TYPE_PRECEDES => { :landscape_margin => 20, :color => '#628FEA' }
}.freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Utils::DateCalculation

#add_working_days, #next_working_date, #non_working_week_days, #working_days

Methods included from I18n

#current_language, #day_letter, #day_name, #find_language, #format_date, #format_time, included, #l, #l_hours, #l_or_humanize, #languages_options, #ll, #month_name, #set_language_if_valid, #valid_languages

Constructor Details

#initialize(options = {}) ⇒ Gantt

Returns a new instance of Gantt.


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# File 'lib/redmine/helpers/gantt.rb', line 52

def initialize(options={})
  options = options.dup
  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
  @subjects = ''
  @lines = ''
  @number_of_rows = nil
  @truncated = false
  if options.has_key?(:max_rows)
    @max_rows = options[:max_rows]
  else
    @max_rows = Setting.gantt_items_limit.blank? ? nil : Setting.gantt_items_limit.to_i
  end
end

Instance Attribute Details

#date_from ⇒ Object (readonly)

Returns the value of attribute date_from


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# File 'lib/redmine/helpers/gantt.rb', line 47

def date_from
  @date_from
end

#date_to ⇒ Object (readonly)

Returns the value of attribute date_to


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# File 'lib/redmine/helpers/gantt.rb', line 47

def date_to
  @date_to
end

#max_rows ⇒ Object (readonly)

Returns the value of attribute max_rows


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# File 'lib/redmine/helpers/gantt.rb', line 47

def max_rows
  @max_rows
end

#month_from ⇒ Object (readonly)

Returns the value of attribute month_from


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# File 'lib/redmine/helpers/gantt.rb', line 47

def month_from
  @month_from
end

#months ⇒ Object (readonly)

Returns the value of attribute months


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# File 'lib/redmine/helpers/gantt.rb', line 47

def months
  @months
end

#project ⇒ Object

Returns the value of attribute project


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# File 'lib/redmine/helpers/gantt.rb', line 49

def project
  @project
end

#query ⇒ Object

Returns the value of attribute query


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# File 'lib/redmine/helpers/gantt.rb', line 48

def query
  @query
end

#truncated ⇒ Object (readonly)

Returns the value of attribute truncated


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# File 'lib/redmine/helpers/gantt.rb', line 47

def truncated
  @truncated
end

#view ⇒ Object

Returns the value of attribute view


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# File 'lib/redmine/helpers/gantt.rb', line 50

def view
  @view
end

#year_from ⇒ Object (readonly)

Returns the value of attribute year_from


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# File 'lib/redmine/helpers/gantt.rb', line 47

def year_from
  @year_from
end

#zoom ⇒ Object (readonly)

Returns the value of attribute zoom


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# File 'lib/redmine/helpers/gantt.rb', line 47

def zoom
  @zoom
end

Instance Method Details

#common_params ⇒ Object 


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# File 'lib/redmine/helpers/gantt.rb', line 88

def common_params
  { :controller => 'gantts', :action => 'show', :project_id => @project }
end

#decrement_indent(options, factor = 1) ⇒ Object 


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# File 'lib/redmine/helpers/gantt.rb', line 281

def decrement_indent(options, factor=1)
  increment_indent(options, -factor)
end

#increment_indent(options, factor = 1) ⇒ Object 


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# File 'lib/redmine/helpers/gantt.rb', line 273

def increment_indent(options, factor=1)
  options[:indent] += options[:indent_increment] * factor
  if block_given?
    yield
    decrement_indent(options, factor)
  end
end

#issues ⇒ Object

Returns issues that will be rendered


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# File 'lib/redmine/helpers/gantt.rb', line 139

def issues
  @issues ||= @query.issues(
    :include => [:assigned_to, :tracker, :priority, :category, :fixed_version],
    :order => "#{Project.table_name}.lft ASC, #{Issue.table_name}.id ASC",
    :limit => @max_rows
  )
end

#line(start_date, end_date, done_ratio, markers, label, options, object = nil) ⇒ Object 


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# File 'lib/redmine/helpers/gantt.rb', line 327

def line(start_date, end_date, done_ratio, markers, label, options, object=nil)
  options[:zoom] ||= 1
  options[:g_width] ||= (self.date_to - self.date_from + 1) * options[:zoom]
  coords = coordinates(start_date, end_date, done_ratio, options[:zoom])
  send "#{options[:format]}_task", options, coords, markers, label, object
end

#line_for_issue(issue, options) ⇒ Object 


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# File 'lib/redmine/helpers/gantt.rb', line 314

def line_for_issue(issue, options)
  # Skip issues that don't have a due_before (due_date or version's due_date)
  if issue.is_a?(Issue) && issue.due_before
    label = "#{issue.status.name} #{issue.done_ratio}%"
    markers = !issue.leaf?
    line(issue.start_date, issue.due_before, issue.done_ratio, markers, label, options, issue)
  end
end

#line_for_project(project, options) ⇒ Object 


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# File 'lib/redmine/helpers/gantt.rb', line 289

def line_for_project(project, options)
  # Skip projects that don't have a start_date or due date
  if project.is_a?(Project) && project.start_date && project.due_date
    label = project.name
    line(project.start_date, project.due_date, nil, true, label, options, project)
  end
end

#line_for_version(version, options) ⇒ Object 


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# File 'lib/redmine/helpers/gantt.rb', line 301

def line_for_version(version, options)
  # Skip versions that don't have a start_date
  if version.is_a?(Version) && version.due_date && version.start_date
    label = "#{h(version)} #{h(version.completed_percent.to_f.round)}%"
    label = h("#{version.project} -") + label unless @project && @project == version.project
    line(version.start_date, version.due_date,  version.completed_percent, true, label, options, version)
  end
end

#lines(options = {}) ⇒ Object

Renders the lines of the Gantt chart, the right side


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# File 'lib/redmine/helpers/gantt.rb', line 133

def lines(options={})
  render(options.merge(:only => :lines)) unless @lines_rendered
  @lines
end

#number_of_rows ⇒ Object

Returns the number of rows that will be rendered on the Gantt chart


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# File 'lib/redmine/helpers/gantt.rb', line 110

def number_of_rows
  return @number_of_rows if @number_of_rows
  rows = projects.inject(0) {|total, p| total += number_of_rows_on_project(p)}
  rows > @max_rows ? @max_rows : rows
end

#number_of_rows_on_project(project) ⇒ Object

Returns the number of rows that will be used to list a project on the Gantt chart. This will recurse for each subproject.


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# File 'lib/redmine/helpers/gantt.rb', line 118

def number_of_rows_on_project(project)
  return 0 unless projects.include?(project)
  count = 1
  count += project_issues(project).size
  count += project_versions(project).size
  count
end

#params ⇒ Object 


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# File 'lib/redmine/helpers/gantt.rb', line 92

def params
  common_params.merge({:zoom => zoom, :year => year_from,
                       :month => month_from, :months => months})
end

#params_next ⇒ Object 


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# File 'lib/redmine/helpers/gantt.rb', line 103

def params_next
  common_params.merge({:year => (date_from >> months).year,
                       :month => (date_from >> months).month,
                       :zoom => zoom, :months => months})
end

#params_previous ⇒ Object 


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# File 'lib/redmine/helpers/gantt.rb', line 97

def params_previous
  common_params.merge({:year => (date_from << months).year,
                       :month => (date_from << months).month,
                       :zoom => zoom, :months => months})
end

#project_issues(project) ⇒ Object

Returns the issues that belong to project


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# File 'lib/redmine/helpers/gantt.rb', line 179

def project_issues(project)
  @issues_by_project ||= issues.group_by(&:project)
  @issues_by_project[project] || []
end

#project_versions(project) ⇒ Object

Returns the distinct versions of the issues that belong to project


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# File 'lib/redmine/helpers/gantt.rb', line 185

def project_versions(project)
  project_issues(project).collect(&:fixed_version).compact.uniq
end

#projects ⇒ Object

Return all the project nodes that will be displayed


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# File 'lib/redmine/helpers/gantt.rb', line 162

def projects
  return @projects if @projects
  ids = issues.collect(&:project).uniq.collect(&:id)
  if ids.any?    # All issues projects and their visible ancestors

    @projects = Project.visible.
      joins("LEFT JOIN #{Project.table_name} child ON #{Project.table_name}.lft <= child.lft AND #{Project.table_name}.rgt >= child.rgt").
      where("child.id IN (?)", ids).
      order("#{Project.table_name}.lft ASC").
      uniq.
      to_a
  else
    @projects = []
  end
end

#relations ⇒ Object

Returns a hash of the relations between the issues that are present on the gantt and that should be displayed, grouped by issue ids.


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# File 'lib/redmine/helpers/gantt.rb', line 149

def relations
  return @relations if @relations
  if issues.any?
    issue_ids = issues.map(&:id)
    @relations = IssueRelation.
      where(:issue_from_id => issue_ids, :issue_to_id => issue_ids, :relation_type => DRAW_TYPES.keys).
      group_by(&:issue_from_id)
  else
    @relations = {}
  end
end

#render(options = {}) ⇒ Object 


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# File 'lib/redmine/helpers/gantt.rb', line 194

def render(options={})
  options = {:top => 0, :top_increment => 20,
             :indent_increment => 20, :render => :subject,
             :format => :html}.merge(options)
  indent = options[:indent] || 4
  @subjects = '' unless options[:only] == :lines
  @lines = '' unless options[:only] == :subjects
  @number_of_rows = 0
  begin
    Project.project_tree(projects) do |project, level|
      options[:indent] = indent + level * options[:indent_increment]
      render_project(project, options)
    end
  rescue MaxLinesLimitReached
    @truncated = true
  end
  @subjects_rendered = true unless options[:only] == :lines
  @lines_rendered = true unless options[:only] == :subjects
  render_end(options)
end

#render_end(options = {}) ⇒ Object 


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# File 'lib/redmine/helpers/gantt.rb', line 266

def render_end(options={})
  case options[:format]
  when :pdf
    options[:pdf].Line(15, options[:top], PDF::TotalWidth, options[:top])
  end
end

#render_issues(issues, options = {}) ⇒ Object 


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# File 'lib/redmine/helpers/gantt.rb', line 238

def render_issues(issues, options={})
  self.class.sort_issues!(issues)
  ancestors = []
  issues.each do |issue|
    while ancestors.any? && !issue.is_descendant_of?(ancestors.last)
      ancestors.pop
      decrement_indent(options)
    end
    render_object_row(issue, options)
    unless issue.leaf?
      ancestors << issue
      increment_indent(options)
    end
  end
  decrement_indent(options, ancestors.size)
end

#render_object_row(object, options) ⇒ Object 


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# File 'lib/redmine/helpers/gantt.rb', line 255

def render_object_row(object, options)
  class_name = object.class.name.downcase
  send("subject_for_#{class_name}", object, options) unless options[:only] == :lines
  send("line_for_#{class_name}", object, options) unless options[:only] == :subjects
  options[:top] += options[:top_increment]
  @number_of_rows += 1
  if @max_rows && @number_of_rows >= @max_rows
    raise MaxLinesLimitReached
  end
end

#render_project(project, options = {}) ⇒ Object 


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# File 'lib/redmine/helpers/gantt.rb', line 215

def render_project(project, options={})
  render_object_row(project, options)
  increment_indent(options) do
    # render issue that are not assigned to a version
    issues = project_issues(project).select {|i| i.fixed_version.nil?}
    render_issues(issues, options)    # then render project versions and their issues

    versions = project_versions(project)
    self.class.sort_versions!(versions)
    versions.each do |version|
      render_version(project, version, options)
    end
  end
end

#render_version(project, version, options = {}) ⇒ Object 


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# File 'lib/redmine/helpers/gantt.rb', line 230

def render_version(project, version, options={})
  render_object_row(version, options)
  increment_indent(options) do
    issues = version_issues(project, version)
    render_issues(issues, options)
  end
end

#subject(label, options, object = nil) ⇒ Object 


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# File 'lib/redmine/helpers/gantt.rb', line 323

def subject(label, options, object=nil)
  send "#{options[:format]}_subject", options, label, object
end

#subject_for_issue(issue, options) ⇒ Object 


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# File 'lib/redmine/helpers/gantt.rb', line 310

def subject_for_issue(issue, options)
  subject(issue.subject, options, issue)
end

#subject_for_project(project, options) ⇒ Object 


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# File 'lib/redmine/helpers/gantt.rb', line 285

def subject_for_project(project, options)
  subject(project.name, options, project)
end

#subject_for_version(version, options) ⇒ Object 


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# File 'lib/redmine/helpers/gantt.rb', line 297

def subject_for_version(version, options)
  subject(version.to_s_with_project, options, version)
end

#subjects(options = {}) ⇒ Object

Renders the subjects of the Gantt chart, the left side.


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# File 'lib/redmine/helpers/gantt.rb', line 127

def subjects(options={})
  render(options.merge(:only => :subjects)) unless @subjects_rendered
  @subjects
end

#to_image(format = 'PNG') ⇒ Object 


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# File 'lib/redmine/helpers/gantt.rb', line 336

def to_image(format='PNG')
  date_to = (@date_from >> @months) - 1
  show_weeks = @zoom > 1
  show_days = @zoom > 2
  subject_width = 400
  header_height = 18  # width of one day in pixels

  zoom = @zoom * 2
  g_width = (@date_to - @date_from + 1) * zoom
  g_height = 20 * number_of_rows + 30
  headers_height = (show_weeks ? 2 * header_height : header_height)
  height = g_height + headers_height
  imgl = Magick::ImageList.new
  imgl.new_image(subject_width + g_width + 1, height)
  gc = Magick::Draw.new
  gc.font = Redmine::Configuration['rmagick_font_path'] || ""  # Subjects

  gc.stroke('transparent')
  subjects(:image => gc, :top => (headers_height + 20), :indent => 4, :format => :image)  # 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_height
    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_height, left + width, 2 * header_height + 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_height, left.round + width, 2 * header_height + g_height - 1)
      gc.fill('black')
      gc.stroke('transparent')
      gc.stroke_width(1)
      gc.text(left.round + 2, header_height + 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_height - 1
    wday = @date_from.cwday
    (date_to - @date_from + 1).to_i.times do
      width =  zoom
      gc.fill(non_working_week_days.include?(wday) ? '#eee' : 'white')
      gc.stroke('#ddd')
      gc.stroke_width(1)
      gc.rectangle(left, 2 * header_height, left + width, 2 * header_height + 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_height)
  gc.stroke('black')
  gc.rectangle(0, 0, subject_width + g_width, g_height + headers_height - 1)  # content

  top = headers_height + 20
  gc.stroke('transparent')
  lines(:image => gc, :top => top, :zoom => zoom,
        :subject_width => subject_width, :format => :image)  # 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_height, x, headers_height + g_height - 1)
  end
  gc.draw(imgl)
  imgl.format = format
  imgl.to_blob
end

#to_pdf ⇒ Object 


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# File 'lib/redmine/helpers/gantt.rb', line 441

def to_pdf
  pdf = ::Redmine::Export::PDF::ITCPDF.new(current_language)
  pdf.SetTitle("#{l(:label_gantt)} #{project}")
  pdf.alias_nb_pages
  pdf.footer_date = format_date(Date.today)
  pdf.AddPage("L")
  pdf.SetFontStyle('B', 12)
  pdf.SetX(15)
  pdf.RDMCell(PDF::LeftPaneWidth, 20, project.to_s)
  pdf.Ln
  pdf.SetFontStyle('B', 9)
  subject_width = PDF::LeftPaneWidth
  header_height = 5
  headers_height = header_height
  show_weeks = false
  show_days = false
  if self.months < 7
    show_weeks = true
    headers_height = 2 * header_height
    if self.months < 3
      show_days = true
      headers_height = 3 * header_height
    end
  end
  g_width = PDF.right_pane_width
  zoom = (g_width) / (self.date_to - self.date_from + 1)
  g_height = 120
  t_height = g_height + headers_height
  y_start = pdf.GetY  # Months headers

  month_f = self.date_from
  left = subject_width
  height = header_height
  self.months.times do
    width = ((month_f >> 1) - month_f) * zoom
    pdf.SetY(y_start)
    pdf.SetX(left)
    pdf.RDMCell(width, height, "#{month_f.year}-#{month_f.month}", "LTR", 0, "C")
    left = left + width
    month_f = month_f >> 1
  end  # Weeks headers

  if show_weeks
    left = subject_width
    height = header_height
    if self.date_from.cwday == 1      # self.date_from is monday

      week_f = self.date_from
    else
      # find next monday after self.date_from
      week_f = self.date_from + (7 - self.date_from.cwday + 1)
      width = (7 - self.date_from.cwday + 1) * zoom-1
      pdf.SetY(y_start + header_height)
      pdf.SetX(left)
      pdf.RDMCell(width + 1, height, "", "LTR")
      left = left + width + 1
    end
    while week_f <= self.date_to
      width = (week_f + 6 <= self.date_to) ? 7 * zoom : (self.date_to - week_f + 1) * zoom
      pdf.SetY(y_start + header_height)
      pdf.SetX(left)
      pdf.RDMCell(width, height, (width >= 5 ? week_f.cweek.to_s : ""), "LTR", 0, "C")
      left = left + width
      week_f = week_f + 7
    end
  end  # Days headers

  if show_days
    left = subject_width
    height = header_height
    wday = self.date_from.cwday
    pdf.SetFontStyle('B', 7)
    (self.date_to - self.date_from + 1).to_i.times do
      width = zoom
      pdf.SetY(y_start + 2 * header_height)
      pdf.SetX(left)
      pdf.RDMCell(width, height, day_name(wday).first, "LTR", 0, "C")
      left = left + width
      wday = wday + 1
      wday = 1 if wday > 7
    end
  end
  pdf.SetY(y_start)
  pdf.SetX(15)
  pdf.RDMCell(subject_width + g_width - 15, headers_height, "", 1)  # Tasks

  top = headers_height + y_start
  options = {
    :top => top,
    :zoom => zoom,
    :subject_width => subject_width,
    :g_width => g_width,
    :indent => 0,
    :indent_increment => 5,
    :top_increment => 5,
    :format => :pdf,
    :pdf => pdf
  }
  render(options)
  pdf.Output
end

#version_issues(project, version) ⇒ Object

Returns the issues that belong to project and are assigned to version


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# File 'lib/redmine/helpers/gantt.rb', line 190

def version_issues(project, version)
  project_issues(project).select {|issue| issue.fixed_version == version}
end