def update_buy
……
# 按下方向键上与下的情况下
if Input.repeat?(Input::UP) or Input.repeat?(Input::DOWN)
# 获取物品
@item = @buy_window.item
# 获取物品所持数
case @item
when RPG::Item
number = $game_party.item_number(@item.id)
when RPG::Weapon
number = $game_party.weapon_number(@item.id)
when RPG::Armor
number = $game_party.armor_number(@item.id)
end
max = @item.price == 0 ? 99 : $game_party.gold / @item.price
max = [max, 99 - number].min
end
# 光标右
if Input.repeat?(Input::RIGHT)
# 物品无效的情况下、或者价格在所持金以上的情况下
if @item == nil or @item.price > $game_party.gold
# 演奏冻结 SE
$game_system.se_play($data_system.buzzer_se)
return
end
# 如果已经拥有了 99 个情况下
if number == 99
# 演奏冻结 SE
$game_system.se_play($data_system.buzzer_se)
return
end
#-------------
# 数量+1
#-------------
end
# 光标左
if Input.repeat?(Input::LEFT)
#-------------
#数量-1 if @数量不为0
#-------------
end
# 按下 C 键的情况下
if Input.trigger?(Input::C)
# 演奏商店 SE
$game_system.se_play($data_system.shop_se)
# 购买处理
$game_party.lose_gold(@number_window.number * @item.price)
case @item
when RPG::Item
$game_party.gain_item(@item.id, @number_window.number)
when RPG::Weapon
$game_party.gain_weapon(@item.id, @number_window.number)
when RPG::Armor
$game_party.gain_armor(@item.id, @number_window.number)
end
# 刷新各窗口
@gold_window.refresh
@buy_window.refresh
@status_window.refresh
return
end
refresh
end