Python Tkinter 菜单示例

没有子菜单的示例

import sys

import tkinter as tk

def hello_handler():

pass

root = tk.Tk()

root.title(u"菜单")

# 创建一个菜单

menubar = tk.Menu(root)

menubar.add_command(label=u"单击我", command=hello_handler)

menubar.add_command(label=u"退出", command=root.quit)

# 将菜单添加到主窗口中

root.config(menu=menubar)

root.mainloop()

 有子菜单（下拉菜单）的示例

import sys

import tkinter as tk

def hello_handler():

pass

root = tk.Tk()

root.title(u"演示下拉菜单的用法")

# 创建一个菜单

main_menu_bar = tk.Menu(root)

# 创建一个子菜单

filemenu = tk.Menu(main_menu_bar, tearoff=0)

filemenu.add_command(label=u"打开", command=hello_handler)

filemenu.add_command(label=u"保存", command=hello_handler)

filemenu.add_separator()

filemenu.add_command(label=u"退出", command=root.quit)

# 将子菜单加入到菜单条中

main_menu_bar.add_cascade(label=u"文件", menu=filemenu)

# 创建一个子菜单

editmenu = tk.Menu(main_menu_bar, tearoff=0)

editmenu.add_command(label=u"剪切", command=hello_handler)

editmenu.add_command(label=u"复制", command=hello_handler)

editmenu.add_command(label=u"粘贴", command=hello_handler)

# 将子菜单加入到菜单条中

main_menu_bar.add_cascade(label=u"编辑", menu=editmenu)

# 创建一个子菜单

helpmenu = tk.Menu(main_menu_bar, tearoff=0)

helpmenu.add_command(label=u"关于", command=hello_handler)

# 将子菜单加入到菜单条中

main_menu_bar.add_cascade(label=u"帮助", menu=helpmenu)

# 将菜单添加到主窗口中

root.config(menu=main_menu_bar)

root.mainloop()

 思路：先把绿色做好，再把红色做好，最后把红色关联到绿色（级联）

tearoff    Normally, a menu can be torn off, the first position (position 0) in the list of choices is occupied by the tear-off element, and the additional choices are added starting at position 1. If you set tearoff=0, the menu will not have a tear-off feature, and choices will be added starting at position 0.tearoff的作用就是可以将每个菜单分离出去，单独形成一个子窗口。通常将tearoff设置为0。原文链接：https://blog.csdn.net/weixin_43708622/article/details/107053182

REF

https://www.weixueyuan.net/a/800.html

http://www.wb86.com/post/326.html

https://www.cnblogs.com/rainbow-tan/p/14885095.html

https://blog.csdn.net/weixin_43708622/article/details/107053182

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