Doctor Todd One Person Menu - Addon - Item

#===============================================================================
#
# R2's One Person Item Menu - Addon to DT OPM
# Author: Roninator2
# Date (31/05/2022)
# Type: (Menu)
# Version: (1.0.0) (VXA)
# Level: (Simple)
#
#===============================================================================
#
# NOTES: 1)This script will only work with ace, you may find my VX version on
# RMRK.net and the rpg maker web forums.
#
#===============================================================================
#
# Description: A menu that is modified to work as if you are only using one
# actor.
#
# Credits: Me (Roninator2)
#
#===============================================================================
#
# Instructions
# Paste above main.
#
#===============================================================================

module DTOPMI

  #Window skin to use, place in system.
  WINDOW = ('Window')

  #Help Window X
  HX = 50

  #Help Window Y
  HY = 50

  #Help Window Width
  HW = 550

  #Help Window Height
  HH = 70

  #Category Window X
  ICX = 50

  #Catagory Window Y
  ICY = 120

  #Category Window Width
  ICW = 550

  #Item Window X
  IX = 50

  #Item Window Y
  IY = 170

  #Item Window Width
  IW = 550

  #Item Window Height
  IH = 300

end

class Scene_Item < Scene_ItemBase
  #--------------------------------------------------------------------------
  # * Start Processing
  #--------------------------------------------------------------------------
  def start
    super
    create_help_window
    create_category_window
    create_item_window
  end
  #--------------------------------------------------------------------------
  # * Create Category Window
  #--------------------------------------------------------------------------
  def create_category_window
    @help_window.x = (DTOPMI::HX)
    @help_window.y = (DTOPMI::HY)
    @category_window = Window_ItemCategory.new
    @category_window.windowskin = Cache.system(DTOPMI::WINDOW)
    @category_window.viewport = @viewport
    @category_window.help_window = @help_window
    @category_window.x = (DTOPMI::ICX)
    @category_window.y = (DTOPMI::ICY)
    @category_window.set_handler(:ok,     method(:on_category_ok))
    @category_window.set_handler(:cancel, method(:return_scene))
  end
  #--------------------------------------------------------------------------
  # * Create Item Window
  #--------------------------------------------------------------------------
  def create_item_window
    @item_window = Window_ItemList.new((DTOPMI::IX), (DTOPMI::IY), (DTOPMI::IW), (DTOPMI::IH))
    @item_window.windowskin = Cache.system(DTOPMI::WINDOW)
    @item_window.viewport = @viewport
    @item_window.help_window = @help_window
    @item_window.set_handler(:ok,     method(:on_item_ok))
    @item_window.set_handler(:cancel, method(:on_item_cancel))
    @category_window.item_window = @item_window
  end
end

class Window_Help < Window_Base
  def initialize(line_number = 2)
    super(0, 0, (DTOPMI::HW), (DTOPMI::HH))
  end
end

class Window_ItemCategory < Window_HorzCommand
  def window_width
    (DTOPMI::ICW)
  end
end