def read
    def read_child el, parent
      el.elements.each {|e|
        if e.attributes["included"]
          reminder = {:days => e.attributes["days"].split(",").map{|day| day.strip}, :date => e.attributes["date"], :time => e.attributes["time"]}
          reminder[:included] = true if e.attributes["included"] == "true"
          reminder[:included] = false if e.attributes["included"] == "false"

          item = add_task parent, e.attributes["name"], reminder
          read_child(e, item)
        else
          item = add_task parent, e.attributes["name"]
          read_child(e, item)
        end

        item.setDisabled true if e.attributes["visible"] == "false"
      }
    end

    xml_data = IO.read("tasks.xml")
    doc = REXML::Document.new(xml_data)
    doc.elements.each("tasks/task") {|el|
      if el.attributes["included"]
        reminder = {:days => el.attributes["days"].split(",").map{|day| day.strip}, :date => el.attributes["date"], :time => el.attributes["time"]}
        reminder[:included] = true if el.attributes["included"] == "true"
        reminder[:included] = false if el.attributes["included"] == "false"

        item = add_task @treewidget, el.attributes["name"], reminder
        read_child el, item
      else
        item = add_task @treewidget, el.attributes["name"]
        read_child el, item
      end
      item.setDisabled true if el.attributes["visible"] == "false"
    }

  end

  def save
    out_file = File.open("tasks.xml", 'w')
    builder = Builder::XmlMarkup.new(:target=>out_file, :indent=>2)
    builder.instruct!
    def write b, item
      item_text = item.text(0)

      if @reminder[item.object_id].included
        if item.childCount > 0
          b.task(:visible => !item.isDisabled, :name => item_text, :included => @reminder[item.object_id].included,:days => @reminder[item.object_id].days.inject{|res, el| res += ", " + el},:date => @reminder[item.object_id].date, :time => @reminder[item.object_id].time) {
            (0...item.childCount).each { |child_index| write(b, item.child(child_index)) }
          }
        else
          b.task :visible => !item.isDisabled, :name => item_text, :included => @reminder[item.object_id].included,:days => @reminder[item.object_id].days.inject{|res, el| res += ", " + el},:date => @reminder[item.object_id].date, :time => @reminder[item.object_id].time
        end
      else
        if item.childCount > 0
          b.task(:visible => !item.isDisabled, :name => item_text) { (0...item.childCount).each { |child_index| write(b, item.child(child_index)) } }
        else
          b.task :visible => !item.isDisabled, :name => item_text
        end
      end
    end

    builder.tasks {
      (0...@treewidget.topLevelItemCount).each {|row|
        top_item = @treewidget.topLevelItem(row)
        top_item_text = top_item.text 0

        if @reminder[top_item.object_id].included
          if top_item.childCount > 0
            builder.task(:visible => !top_item.isDisabled, :name => top_item_text, :included => @reminder[top_item.object_id].included,:days => @reminder[top_item.object_id].days.inject{|res, el| res += ", " + el},:date => @reminder[top_item.object_id].date, :time => @reminder[top_item.object_id].time) {
              (0...top_item.childCount).each { |child_index| write(builder, top_item.child(child_index)) }
            }
          else
            builder.task :visible => !top_item.isDisabled, :name => top_item_text, :included => @reminder[top_item.object_id].included,:days => @reminder[top_item.object_id].days.inject{|res, el| res += ", " + el},:date => @reminder[top_item.object_id].date, :time => @reminder[top_item.object_id].time
          end
        else
          if top_item.childCount > 0
            builder.task(:visible => !top_item.isDisabled, :name => top_item_text) {
              (0...top_item.childCount).each { |child_index| write(builder, top_item.child(child_index)) }
            }
          else
            builder.task :visible => !top_item.isDisabled, :name => top_item_text
          end
        end
      }
    }
    out_file.close
  end