Class: Dynatree::Renderer

Inherits:
Object
  • Object
show all
Defined in:
lib/dynatree-rails/renderer.rb

Instance Method Summary collapse

Constructor Details

#initialize(tree, association) ⇒ Renderer

Returns a new instance of Renderer.



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# File 'lib/dynatree-rails/renderer.rb', line 4

def initialize(tree, association)
  @tree = tree
  @association = association
end

Instance Method Details

#has_selected_children(id) ⇒ Object 



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# File 'lib/dynatree-rails/renderer.rb', line 13

def has_selected_children(id)
  items = @tree.select{ |elem| elem.parent_id == id }
  if items.empty?
    false
  else
    items.each do |item|
      if @association.include? item
        return true
      end
      if has_selected_children(item.id)
        return true
      end
    end
    false
  end
end

#recurse(parent_id) ⇒ Object 



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# File 'lib/dynatree-rails/renderer.rb', line 30

def recurse(parent_id)
  ret = []
  items = @tree.select{ |elem| elem.parent_id == parent_id }
  unless items.empty?
    items.each do |item|
      ch = {}
      if @association.include? item
        ch['select'] = true
        ch['expand'] = true
      else
        if has_selected_children(item.id)
          ch['expand'] = true
        end
      end
      ch['title'] = item.name
      ch['key']   = item.id.to_s
      ch['children'] = self.recurse(item.id)
      ret << ch
    end
  end
  ret
end

#render ⇒ Object 



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# File 'lib/dynatree-rails/renderer.rb', line 9

def render()
  self.recurse(nil).to_json
end