Kadafi - Multi Currency

# =============================================================================
# Kadafi - Multi Currency
# Version : 1.1
# Contact : http://kakakadafi.blogspot.com or umarqadafi1@hotmail.com
# =============================================================================
($imported ||= {})[:Kadafi_MultiCurrency] = true
# =============================================================================
# CHANGE LOGS:
# -----------------------------------------------------------------------------
# 2014.06.22 - Started and Finished script
# 2014.06.22 - Bugfix: Items still buyable even if the money is not enough to buy the items.
# =============================================================================
=begin

  Introduction :
  This script allows you to have an auto Money Changer in shop.
  You can call this "Multi Currency" System. :v

  How to Use :
[*] Script call :
    Kadafi::MultiCurrency  = true         >>> To activate this script.
    Kadafi::CurrencySymbol = "Up to you"  >>> To set the currency symbol.
    Kadafi::ExchangeRates  = amount       >>> To set the currency exchange rates.

    Example : <<< Call this on every map if you want to have different Exchange Rates.
    Kadafi::MultiCurrency  = true
    Kadafi::CurrencySymbol = "$"
    Kadafi::ExchangeRates  = 10000

  TERMS OF USE :
  Free for use on any non-Commercial or Commercial Game Projects.
  If you use this for commercial uses,
  give me a free copy of your game would be nice :)
  Credit: Kadafi

=end
# =============================================================================
# Configuration - Don't edit this configuration.
# =============================================================================
module Kadafi
  MultiCurrency  = false
  CurrencySymbol = ""
  ExchangeRates  = 1
end
# =============================================================================
# End of Configuration
# =============================================================================
class Window_ShopBuy < Window_Selectable
  #--------------------------------------------------------------------------
  # * New Method : Get New Price of Item
  #--------------------------------------------------------------------------
  def new_price(item)
    if Kadafi::MultiCurrency
      @price[item] * Kadafi::ExchangeRates
    else
      @price[item]
    end
  end
  #--------------------------------------------------------------------------
  # * Overwritten Method : Display in Enabled State?
  #--------------------------------------------------------------------------
  def enable?(item)
    if Kadafi::MultiCurrency
      item && new_price(item) <= @money && !$game_party.item_max?(item)
    else
      item && price(item) <= @money && !$game_party.item_max?(item)
    end
  end
  #--------------------------------------------------------------------------
  # * Overwritten Method : Draw Item
  #--------------------------------------------------------------------------
  def draw_item(index)
    item = @data[index]
    rect = item_rect(index)
    draw_item_name(item, rect.x, rect.y, enable?(item))
    if Kadafi::MultiCurrency
      draw_currency_value(price(item), Kadafi::CurrencySymbol, 4, 0, contents.width - 8)
    else
      draw_currency_value(price(item), Vocab::currency_unit, 4, 0, contents.width - 8)
    end
  end
end

class Window_ShopStatus < Window_Base
  #--------------------------------------------------------------------------
  # * Alias Method : Refresh
  #--------------------------------------------------------------------------
  alias new_refresh refresh
  def refresh
    new_refresh
    draw_exchange_rates(4, line_height * 1)
  end
  #--------------------------------------------------------------------------
  # * New Method : Draw Exchange Rates
  #--------------------------------------------------------------------------
  def draw_exchange_rates(x, y)
    rect = Rect.new(x, y, contents.width - 4 - x, line_height)
    change_color(system_color)
    draw_text(rect, "Exchange Rates")
    if Kadafi::MultiCurrency
      draw_currency_value(Kadafi::ExchangeRates, Vocab::currency_unit, 4, line_height * 1, contents.width - 8)
    else
      draw_currency_value("1", Vocab::currency_unit, 4, line_height * 1, contents.width - 8)
    end
  end
end

class Scene_Shop < Scene_MenuBase
  #--------------------------------------------------------------------------
  # * Overwritten Method : Get Purchase Price
  #--------------------------------------------------------------------------
  def buying_price
    @buy_window.new_price(@item)
  end
  #--------------------------------------------------------------------------
  # * Overwritten Methd : Get Sale Price
  #--------------------------------------------------------------------------
  def selling_price
    if Kadafi::MultiCurrency
      @buy_window.new_price(@item) / 2
    else
      @item.price / 2
    end
  end
end