import tkinter as tk

from tkinter import messagebox

# 设置窗口居中

def window_info():

    ws = window.winfo_screenwidth()

    hs = window.winfo_screenheight()

    x = (ws / 2) - 200

    y = (hs / 2) - 200

    print("%d,%d" % (ws, hs))

    return x, y

# 设置登陆窗口属性

window = tk.Tk()

window.title('欢迎你登陆系统')

a, b = window_info()

window.geometry("450x300+%d+%d" % (a, b))

# 登陆界面的信息

tk.Label(window, text="欢迎你登陆系统", font=("宋体", 32)).place(x=80, y=50)

tk.Label(window, text="账号：").place(x=120, y=150)

tk.Label(window, text="密码：").place(x=120, y=190)

# 显示输入框

var_usr_name = tk.StringVar()

# 显示默认账号

var_usr_name.set('gisoracle')

entry_usr_name = tk.Entry(window, textvariable=var_usr_name)

entry_usr_name.place(x=190, y=150)

var_usr_pwd = tk.StringVar()

# 设置输入密码后显示*号

entry_usr_pwd = tk.Entry(window, textvariable=var_usr_pwd, show='*')

entry_usr_pwd.place(x=190, y=190)

# 登陆函数

def usr_login():

    tk.messagebox.showinfo('Welcome', '您已经注册成功！')

# 登陆和注册按钮

btn_login = tk.Button(window, text="登陆", command=usr_login)

btn_login.place(x=170, y=230)

btn_sign_up = tk.Button(window, text="注册", command=usr_login)

btn_sign_up.place(x=270, y=230)

window.mainloop()