#!/usr/bin/env python

# -*- coding: utf-8 -*-

# author:洪卫

import tkinter as tk # 使用Tkinter前需要先导入

import tkinter.messagebox

import pickle

# 第1步，实例化object，建立窗口window

window = tk.Tk()

# 第2步，给窗口的可视化起名字

window.title('Wellcome to Hongwei Website')

# 第3步，设定窗口的大小(长 * 宽)

window.geometry('400x300') # 这里的乘是小x

# 第4步，加载 wellcome image

canvas = tk.Canvas(window, width=400, height=135, bg='green')

image_file = tk.PhotoImage(file='')

image = canvas.create_image(200, 0, anchor='n', image=image_file)

canvas.pack(side='top')

tk.Label(window, text='Wellcome',font=('Arial', 16)).pack()

# 第5步，用户信息

tk.Label(window, text='User name:', font=('Arial', 14)).place(x=10, y=170)

tk.Label(window, text='Password:', font=('Arial', 14)).place(x=10, y=210)

# 第6步，用户登录输入框entry

# 用户名

var_usr_name = tk.StringVar()

var_usr_name.set('example@python.com')

entry_usr_name = tk.Entry(window, textvariable=var_usr_name, font=('Arial', 14))

entry_usr_name.place(x=120,y=175)

# 用户密码

var_usr_pwd = tk.StringVar()

entry_usr_pwd = tk.Entry(window, textvariable=var_usr_pwd, font=('Arial', 14), show='*')

entry_usr_pwd.place(x=120,y=215)

# 第8步，定义用户登录功能

def usr_login():

# 这两行代码就是获取用户输入的usr_name和usr_pwd

usr_name = var_usr_name.get()

usr_pwd = var_usr_pwd.get()

# 这里设置异常捕获，当我们第一次访问用户信息文件时是不存在的，所以这里设置异常捕获。

# 中间的两行就是我们的匹配，即程序将输入的信息和文件中的信息匹配。

try:

with open('usrs_info.pickle', 'rb') as usr_file:

usrs_info = pickle.load(usr_file)

except FileNotFoundError:

# 这里就是我们在没有读取到`usr_file`的时候，程序会创建一个`usr_file`这个文件，并将管理员

# 的用户和密码写入，即用户名为`admin`密码为`admin`。

with open('usrs_info.pickle', 'wb') as usr_file:

usrs_info = {'admin': 'admin'}

pickle.dump(usrs_info, usr_file)

usr_file.close() # 必须先关闭，否则pickle.load()会出现EOFError: Ran out of input

# 如果用户名和密码与文件中的匹配成功，则会登录成功，并跳出弹窗how are you? 加上你的用户名。

if usr_name in usrs_info:

if usr_pwd == usrs_info[usr_name]:

tkinter.messagebox.showinfo(title='Welcome', message='How are you? ' + usr_name)

# 如果用户名匹配成功，而密码输入错误，则会弹出'Error, your password is wrong, try again.'

else:

tkinter.messagebox.showerror(message='Error, your password is wrong, try again.')

else: # 如果发现用户名不存在

is_sign_up = tkinter.messagebox.askyesno('Welcome！ ', 'You have not sign up yet. Sign up now?')

# 提示需不需要注册新用户

if is_sign_up:

usr_sign_up()

# 第9步，定义用户注册功能

def usr_sign_up():

def sign_to_Hongwei_Website():

# 以下三行就是获取我们注册时所输入的信息

np = new_pwd.get()

npf = new_pwd_confirm.get()

nn = new_name.get()

# 这里是打开我们记录数据的文件，将注册信息读出

with open('usrs_info.pickle', 'rb') as usr_file:

exist_usr_info = pickle.load(usr_file)

# 这里就是判断，如果两次密码输入不一致，则提示Error, Password and confirm password must be the same!

if np != npf:

tkinter.messagebox.showerror('Error', 'Password and confirm password must be the same!')

# 如果用户名已经在我们的数据文件中，则提示Error, The user has already signed up!

elif nn in exist_usr_info:

tkinter.messagebox.showerror('Error', 'The user has already signed up!')

# 最后如果输入无以上错误，则将注册输入的信息记录到文件当中，并提示注册成功Welcome！,You have successfully signed up!，然后销毁窗口。

else:

exist_usr_info[nn] = np

with open('usrs_info.pickle', 'wb') as usr_file:

pickle.dump(exist_usr_info, usr_file)

tkinter.messagebox.showinfo('Welcome', 'You have successfully signed up!')

# 然后销毁窗口。

window_sign_up.destroy()

# 定义长在窗口上的窗口

window_sign_up = tk.Toplevel(window)

window_sign_up.geometry('300x200')

window_sign_up.title('Sign up window')

new_name = tk.StringVar() # 将输入的注册名赋值给变量

new_name.set('example@python.com') # 将最初显示定为'example@python.com'

tk.Label(window_sign_up, text='User name: ').place(x=10, y=10) # 将`User name:`放置在坐标（10,10）。

entry_new_name = tk.Entry(window_sign_up, textvariable=new_name) # 创建一个注册名的`entry`，变量为`new_name`

entry_new_name.place(x=130, y=10) # `entry`放置在坐标（150,10）.

new_pwd = tk.StringVar()

tk.Label(window_sign_up, text='Password: ').place(x=10, y=50)

entry_usr_pwd = tk.Entry(window_sign_up, textvariable=new_pwd, show='*')

entry_usr_pwd.place(x=130, y=50)

new_pwd_confirm = tk.StringVar()

tk.Label(window_sign_up, text='Confirm password: ').place(x=10, y=90)

entry_usr_pwd_confirm = tk.Entry(window_sign_up, textvariable=new_pwd_confirm, show='*')

entry_usr_pwd_confirm.place(x=130, y=90)

# 下面的 sign_to_Hongwei_Website

btn_comfirm_sign_up = tk.Button(window_sign_up, text='Sign up', command=sign_to_Hongwei_Website)

btn_comfirm_sign_up.place(x=180, y=120)

# 第7步，login and sign up 按钮

btn_login = tk.Button(window, text='Login', command=usr_login)

btn_login.place(x=120, y=240)

btn_sign_up = tk.Button(window, text='Sign up', command=usr_sign_up)

btn_sign_up.place(x=200, y=240)

# 第10步，主窗口循环显示

window.mainloop()