[RMXP] Item Weight Addon - Shop

#===============================================================================
# * Scene_Shop
#===============================================================================

class Scene_Shop
  #-----------------------------------------------------------------------------
  # * update_number
  #     Prevents purchasing of items when OVERWEIGHT_PARTY is true and number
  #     of items to buy would exceed maximum weight
  #-----------------------------------------------------------------------------
  alias item_weight_update_number update_number
  def update_number
    unless Weight::OVERWEIGHT_PARTY
      if Input.trigger?(Input::C) && @command_window.index == 0
        weight = @item.weight * @number_window.number
        weight += $game_party.total_weight
        if weight > $game_party.weight_capacity
          $game_system.se_play($data_system.buzzer_se)
          return
        end
      end
    end
    item_weight_update_number
  end
end

#===============================================================================
# * Window_ShopNumber
#===============================================================================

class Window_ShopNumber
  #-----------------------------------------------------------------------------
  # * refresh
  #     Adds a weight display to the number screen at the shop
  #-----------------------------------------------------------------------------
  alias item_weight_refresh refresh
  def refresh
    item_weight_refresh
    weight = (@item.weight * @number) + $game_party.total_weight
    capacity = $game_party.weight_capacity
    self.contents.draw_text(4, 192, 72, 32, 'Weight:')
    color = weight > capacity ? crisis_color : normal_color
    self.contents.font.color = color
    self.contents.draw_text(76, 192, 64, 32, weight.to_s, 2)
    self.contents.font.color = normal_color
    self.contents.draw_text(144, 192, 64, 32, '/ ' + capacity.to_s)
  end
end