categories_menu.rb

  def category_channels_unfocus(params)
    if params[:side]== :down
      @current_category += 1 if @current_category < @categories.count - 1
      if @categories[@current_category].expanded
        @categories[@current_category].activate_current_channel
        focus_on @categories[@current_category]
      else
        @categories[@current_category].activate
        app.statechart.send_action(:fill_channels, @category_list[@current_category])
        focus_on self
      end
    elsif params[:side]== :up
      @current_category -= 1 if @current_category > 0
      if @categories[@current_category].expanded
        @categories[@current_category].activate_current_channel
        focus_on @categories[@current_category]
      else
        @categories[@current_category].activate
        app.statechart.send_action(:fill_channels, @category_list[@current_category])
        focus_on self
      end
    end
  end