import tkinter as tk
from tkinter import messagebox
import sqlite3
class RestaurantApp:
def __init__(self, master):
self.master = master
self.master.title("餐厅点餐系统")
# 连接到数据库
self.connection = sqlite3.connect('menu.db')
self.cursor = self.connection.cursor()
# 创建菜单表（如果不存在）
self.cursor.execute('''CREATE TABLE IF NOT EXISTS menu
(id INTEGER PRIMARY KEY, item TEXT, price REAL)''')
# 插入初始菜单数据（如果不存在）
# self.cursor.execute('''INSERT OR IGNORE INTO menu (item, price) VALUES
# ('汉堡', 10),
# ('披萨', 15),
# ('沙拉', 8),
# ('可乐', 3)''')
self.connection.commit()
# 创建点餐列表
self.order_items = []
# 创建两个按钮
self.customer_button = tk.Button(self.master, text="顾客", command=self.customer_view)
self.customer_button.pack()
self.employee_button = tk.Button(self.master, text="员工", command=self.employee_view)
self.employee_button.pack()
def customer_view(self):
self.master.withdraw() # 隐藏主窗口
# 创建顾客界面
customer_window = tk.Toplevel(self.master)
customer_window.title("顾客界面")
# 创建已点菜单列表框
order_frame = tk.Frame(customer_window)
order_frame.grid(row=0, column=0)
tk.Label(order_frame, text="已点菜单").pack()
order_listbox = tk.Listbox(order_frame, height=10, width=50)
order_listbox.pack()
# 创建删除菜品按钮
def delete_item():
selected_indices = order_listbox.curselection()
if selected_indices:
item_index = selected_indices[0]
order_listbox.delete(item_index)
del self.order_items[item_index]
else:
messagebox.showerror("错误", "请选择要删除的菜品！")
delete_button = tk.Button(order_frame, text="删除", command=delete_item)
delete_button.pack()
# 从数据库中获取菜单信息
self.cursor.execute("SELECT * FROM menu")
menu_items = self.cursor.fetchall()
# 创建菜单列表
tk.Label(customer_window, text="菜单").grid(row=0, column=1)
menu_listbox = tk.Listbox(customer_window, height=10, width=50)
menu_listbox.grid(row=1, column=1)
for item in menu_items:
menu_listbox.insert(tk.END, f"{item[1]} - ￥{item[2]}")
# 创建选择数量按钮
def select_quantity():
selected_indices = menu_listbox.curselection()
if selected_indices:
item_text = menu_listbox.get(selected_indices[0]) # 获取选定菜品文本
item_name = item_text.split(' - ')[0] # 提取菜品名称
ask_quantity(item_name, order_listbox)
else:
messagebox.showerror("错误", "请选择一个菜品！")
quantity_button = tk.Button(customer_window, text="选择数量", command=select_quantity)
quantity_button.grid(row=2, column=1)
# 创建点餐完成按钮
def finish_order():
# 计算总金额
total_price = sum(self.get_item_price(item[0]) * item[1] for item in self.order_items)
# 显示已点菜单和总金额
order_summary = "\n".join([f"{item[0]} x{item[1]}" for item in self.order_items])
messagebox.showinfo("已点菜单", f"您的订单如下：\n{order_summary}\n总金额：￥{total_price}")
# 退出程序
self.master.quit()
finish_button = tk.Button(customer_window, text="完成点餐", command=finish_order)
finish_button.grid(row=3, column=1)
def get_item_price(self, item_name):
# 根据菜品名称从数据库中获取价格
self.cursor.execute("SELECT price FROM menu WHERE item=?", (item_name,))
price = self.cursor.fetchone()
return price[0] if price else 0
def employee_view(self):
# 创建员工登录界面
employee_window = tk.Toplevel(self.master)
employee_window.title("员工登录")
tk.Label(employee_window, text="用户名：").grid(row=0, column=0)
username_entry = tk.Entry(employee_window)
username_entry.grid(row=0, column=1)
tk.Label(employee_window, text="密码：").grid(row=1, column=0)
password_entry = tk.Entry(employee_window, show="*")
password_entry.grid(row=1, column=1)
def login():
username = username_entry.get()
password = password_entry.get()
# 这里可以添加从数据库中验证用户名和密码的逻辑
if username == "admin" and password == "admin":
employee_window.destroy()
self.show_menu_management()
else:
messagebox.showerror("错误", "用户名或密码错误！")
login_button = tk.Button(employee_window, text="登录", command=login)
login_button.grid(row=2, columnspan=2)
def show_menu_management(self):
# 创建菜单管理界面
management_window = tk.Toplevel(self.master)
management_window.title("菜单管理")
# 从数据库中获取菜单信息
self.cursor.execute("SELECT * FROM menu")
menu_items = self.cursor.fetchall()
# 显示当前菜单
tk.Label(management_window, text="当前菜单").grid(row=0, columnspan=2)
menu_listbox = tk.Listbox(management_window, height=5, width=30)
menu_listbox.grid(row=1, columnspan=2)
for item in menu_items:
menu_listbox.insert(tk.END, f"{item[1]} - ￥{item[2]}")
# 添加菜品功能
tk.Label(management_window, text="添加菜品").grid(row=2, column=0)
new_item_entry = tk.Entry(management_window)
new_item_entry.grid(row=2, column=1)
tk.Label(management_window, text="价格").grid(row=3, column=0)
new_price_entry = tk.Entry(management_window)
new_price_entry.grid(row=3, column=1)
def add_item():
new_item = new_item_entry.get()
new_price = new_price_entry.get()
if new_item and new_price:
try:
price = float(new_price)
# 将新菜品添加到数据库
self.cursor.execute("INSERT INTO menu (item, price) VALUES (?, ?)", (new_item, price))
self.connection.commit()
menu_listbox.insert(tk.END, f"{new_item} - ￥{price}")
messagebox.showinfo("成功", "菜品添加成功！")
except ValueError:
messagebox.showerror("错误", "请输入有效的价格！")
else:
messagebox.showerror("错误", "请输入菜品名称和价格！")
add_button = tk.Button(management_window, text="添加", command=add_item)
add_button.grid(row=4, columnspan=2)
def ask_quantity(item_name, order_listbox):
# 创建询问数量的窗口
quantity_window = tk.Toplevel()
quantity_window.title("选择数量")
tk.Label(quantity_window, text=f"请选择{item_name}的数量：").pack()
quantity_entry = tk.Entry(quantity_window)
quantity_entry.pack()
# 创建确定按钮
def confirm_quantity():
quantity = int(quantity_entry.get())
# 在这里可以处理数量的逻辑，例如添加到订单中
order_listbox.insert(tk.END, f"{item_name} x{quantity}")
app.order_items.append((item_name, quantity)) # 将菜品添加到订单列表
quantity_window.destroy()
confirm_button = tk.Button(quantity_window, text="确定", command=confirm_quantity)
confirm_button.pack()
# 创建取消按钮
cancel_button = tk.Button(quantity_window, text="取消", command=quantity_window.destroy)
cancel_button.pack()
# 创建主窗口
root = tk.Tk()
app = RestaurantApp(root)
root.mainloop()
