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
UNAVAILABLE_COLUMNS = 
[:tracker, :id, :subject]

Instance Attribute Summary collapse

Class Method 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

#abbr_day_name, #current_language, #day_letter, #day_name, #find_language, #format_date, #format_hours, #format_time, included, #l, #l_hours, #l_hours_short, #l_or_humanize, #languages_options, #ll, #lu, #month_name, #normalize_float, #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 56

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 ||= User.current.today.month
    @year_from ||= User.current.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 < Setting.gantt_months_limit.to_i + 1) ? 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 = +''
  @columns ||= {}
  @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 51

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 51

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 51

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 51

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 51

def months
  @months
end

#project ⇒ Object

Returns the value of attribute project.



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# File 'lib/redmine/helpers/gantt.rb', line 53

def project
  @project
end

#query ⇒ Object

Returns the value of attribute query.



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

def query
  @query
end

#truncated ⇒ Object (readonly)

Returns the value of attribute truncated.



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# File 'lib/redmine/helpers/gantt.rb', line 51

def truncated
  @truncated
end

#view ⇒ Object

Returns the value of attribute view.



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# File 'lib/redmine/helpers/gantt.rb', line 54

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 51

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 51

def zoom
  @zoom
end

Class Method Details

.sort_issue_logic(issue) ⇒ Object 



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# File 'lib/redmine/helpers/gantt.rb', line 688

def sort_issue_logic(issue)
  julian_date = Date.new
  ancesters_start_date = []
  current_issue = issue
  begin
    ancesters_start_date.unshift([current_issue.start_date || julian_date, current_issue.id])
    current_issue = current_issue.parent
  end while (current_issue)
  ancesters_start_date
end

.sort_issues!(issues) ⇒ Object 



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# File 'lib/redmine/helpers/gantt.rb', line 684

def sort_issues!(issues)
  issues.sort_by! {|issue| sort_issue_logic(issue)}
end

.sort_versions!(versions) ⇒ Object 



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# File 'lib/redmine/helpers/gantt.rb', line 699

def sort_versions!(versions)
  versions.sort!
end

Instance Method Details

#column_content_for_issue(issue, options) ⇒ Object 



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# File 'lib/redmine/helpers/gantt.rb', line 345

def column_content_for_issue(issue, options)
  if options[:format] == :html
    data_options = {}
    data_options[:collapse_expand] = "issue-#{issue.id}"
    data_options[:number_of_rows] = number_of_rows
    style = "position: absolute;top: #{options[:top]}px; font-size: 0.8em;"
    content =
      view.content_tag(
        :div, view.column_content(options[:column], issue),
        :style => style, :class => "issue_#{options[:column].name}",
        :id => "#{options[:column].name}_issue_#{issue.id}",
        :data => data_options
      )
    @columns[options[:column].name] << content if @columns.has_key?(options[:column].name)
    content
  end
end

#common_params ⇒ Object 



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# File 'lib/redmine/helpers/gantt.rb', line 94

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 298

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 290

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 153

def issues
  @issues ||= @query.issues(
    :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 367

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 333

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.dup
    unless issue.disabled_core_fields.include?('done_ratio')
      label << " #{issue.done_ratio}%"
    end
    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 306

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 318

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.visible_fixed_issues.completed_percent.to_f.round)}%"
    label = h("#{version.project} -") + label unless @project && @project == version.project
    line(version.start_date, version.due_date,
         version.visible_fixed_issues.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 141

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 116

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].min
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 125

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 98

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 109

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 103

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 194

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 200

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

#projects ⇒ Object

Return all the project nodes that will be displayed



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# File 'lib/redmine/helpers/gantt.rb', line 176

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").
      distinct.
      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 162

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 209

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 || options[:only] == :selected_columns
  @lines = +'' unless options[:only] == :subjects || options[:only] == :selected_columns
  @columns[options[:column].name] = +'' if options[:only] == :selected_columns && @columns.has_key?(options[:column]) == false
  @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 || options[:only] == :selected_columns
  @lines_rendered = true unless options[:only] == :subjects || options[:only] == :selected_columns
  render_end(options)
end

#render_end(options = {}) ⇒ Object 



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# File 'lib/redmine/helpers/gantt.rb', line 283

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 254

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 271

def render_object_row(object, options)
  class_name = object.class.name.downcase
  send(:"subject_for_#{class_name}", object, options) unless options[:only] == :lines || options[:only] == :selected_columns
  send(:"line_for_#{class_name}", object, options) unless options[:only] == :subjects || options[:only] == :selected_columns
  column_content_for_issue(object, options) if options[:only] == :selected_columns && options[:column].present? && object.is_a?(Issue)
  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 231

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 246

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

#selected_column_content(options = {}) ⇒ Object

Renders the selected column of the Gantt chart, the right side of subjects.



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# File 'lib/redmine/helpers/gantt.rb', line 147

def selected_column_content(options={})
  render(options.merge(:only => :selected_columns)) unless @columns.has_key?(options[:column].name)
  @columns[options[:column].name]
end

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



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# File 'lib/redmine/helpers/gantt.rb', line 363

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 329

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 302

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 314

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 135

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

#to_image(format = 'PNG') ⇒ Object

Generates a gantt image Only defined if MiniMagick is avalaible



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# File 'lib/redmine/helpers/gantt.rb', line 376

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
  # TODO: Remove rmagick_font_path in a later version
  unless Redmine::Configuration['rmagick_font_path'].nil?
    Rails.logger.warn(
      'rmagick_font_path option is deprecated. Use minimagick_font_path instead.'
    )
  end
  font_path =
    Redmine::Configuration['minimagick_font_path'].presence ||
      Redmine::Configuration['rmagick_font_path'].presence
  img = MiniMagick::Image.create(".#{format}")
  if Redmine::Configuration['imagemagick_convert_command'].present?
    MiniMagick.cli_path = File.dirname(Redmine::Configuration['imagemagick_convert_command'])
  end
  MiniMagick.convert do |gc|
    gc.size('%dx%d' % [subject_width + g_width + 1, height])
    gc.xc('white')
    gc.font(font_path) if font_path.present?
    # 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.strokewidth(1)
      gc.draw('rectangle %d,%d %d,%d' % [
        left, 0, left + width, height
      ])
      gc.fill('black')
      gc.stroke('transparent')
      gc.strokewidth(1)
      gc.draw('text %d,%d %s' % [
        left.round + 8, 14, magick_text("#{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.strokewidth(1)
        gc.draw('rectangle %d,%d %d,%d' % [
          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.strokewidth(1)
        gc.draw('rectangle %d,%d %d,%d' % [
          left.round, header_height, left.round + width, 2 * header_height + g_height - 1
        ])
        gc.fill('black')
        gc.stroke('transparent')
        gc.strokewidth(1)
        gc.draw('text %d,%d %s' % [
          left.round + 2, header_height + 14, magick_text(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
      (@date_from..date_to).each do |g_date|
        width =  zoom
        gc.fill(non_working_week_days.include?(g_date.cwday) ? '#eee' : 'white')
        gc.stroke('#ddd')
        gc.strokewidth(1)
        gc.draw('rectangle %d,%d %d,%d' % [
          left, 2 * header_height, left + width, 2 * header_height + g_height - 1
        ])
        left = left + width
      end
    end
    # border
    gc.fill('transparent')
    gc.stroke('grey')
    gc.strokewidth(1)
    gc.draw('rectangle %d,%d %d,%d' % [
      0, 0, subject_width + g_width, headers_height
    ])
    gc.stroke('black')
    gc.draw('rectangle %d,%d %d,%d' % [
      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 User.current.today >= @date_from and User.current.today <= date_to
      gc.stroke('red')
      x = (User.current.today - @date_from + 1) * zoom + subject_width
      gc.draw('line %g,%g %g,%g' % [
        x, headers_height, x, headers_height + g_height - 1
      ])
    end
    gc << img.path
  end
  img.to_blob
ensure
  img.destroy! if img
end

#to_pdf ⇒ Object 



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# File 'lib/redmine/helpers/gantt.rb', line 511

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(User.current.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
      if self.months < 2
        show_day_num = true
        headers_height = 4 * header_height
      end
    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
  # Day numbers headers
  if show_day_num
    left = subject_width
    height = header_height
    day_num = self.date_from
    pdf.SetFontStyle('B', 7)
    (self.date_from..self.date_to).each do |g_date|
      width = zoom
      pdf.SetY(y_start + header_height * 2)
      pdf.SetX(left)
      pdf.SetTextColor(non_working_week_days.include?(g_date.cwday) ? 150 : 0)
      pdf.RDMCell(width, height, day_num.day.to_s, "LTR", 0, "C")
      left = left + width
      day_num = day_num + 1
    end
  end
  # Days headers
  if show_days
    left = subject_width
    height = header_height
    pdf.SetFontStyle('B', 7)
    (self.date_from..self.date_to).each do |g_date|
      width = zoom
      pdf.SetY(y_start + header_height * (show_day_num ? 3 : 2))
      pdf.SetX(left)
      pdf.SetTextColor(non_working_week_days.include?(g_date.cwday) ? 150 : 0)
      pdf.RDMCell(width, height, day_name(g_date.cwday).first, "LTR", 0, "C")
      left = left + width
    end
  end
  pdf.SetY(y_start)
  pdf.SetX(15)
  pdf.SetTextColor(0)
  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 205

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