第二部分 Python提高—GUI图形用户界面编程（八）

本文主要是介绍第二部分 Python提高—GUI图形用户界面编程（八），希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

实战项目编制简易笔记本
要求：

#开发记事本功能
'''开发一个简单的记事本。
包含：新建、保存、修改文本内容、退出
包含：各种快捷键的处理
'''

# -*- coding: utf-8 -*-
"""
Created on Fri Apr 19 07:43:27 2024@author: Administrator
"""#开发记事本功能
'''开发一个简单的记事本。
包含：新建、保存、修改文本内容、退出
包含：各种快捷键的处理
'''from tkinter import *
from tkinter.filedialog import *
from tkinter.colorchooser import *class Application(Frame):def __init__(self,master=None):super().__init__(master)self.master = masterself.textpad = Noneself.filename = Noneself.contextMenu = Noneself.pack()self.createWidget()def createWidget(self):menubar = Menu(root)menuFile = Menu(menubar)menuEdit = Menu(menubar)menuHelp = Menu(menubar)menubar.add_cascade(label="文件(F)",menu=menuFile)menubar.add_cascade(label="编辑(E)",menu=menuEdit)menubar.add_cascade(label="帮助(H)",menu=menuHelp)menuFile.add_command(label="新建(N)",accelerator="ctrl+n",command=self.newfile)menuFile.add_command(label="打开(O)",accelerator="ctrl+o",command=self.openfile)menuFile.add_command(label="保存(S)",accelerator="ctrl+s",command=self.savefile)menuFile.add_separator()menuFile.add_command(label="退出",accelerator='ctrl+q',command=self.exit)root["menu"]=menubarroot.bind("<Control-n>",lambda event:self.newfile())root.bind("<Control-s>",lambda event:self.savefile())root.bind("<Control-o>",lambda event:self.openfile())root.bind("<Control-q>",lambda event:self.exit())self.textpad = Text(root,width=50,height=30)self.textpad.pack()self.contextMenu = Menu(root)self.contextMenu.add_command(label="背景颜色",command=self.openAskColor)root.bind("Button-3",self.createContextMenu)def newfile():        self.textpad.delete("1.0",'end')self.filename = asksaveasfilename(title='另存为',initialfile="未命名.txt",filetype=["文本文档","*.txt"],defaultextension="*.txt")print(self.filename)self.savefile()def openfile(self):self.textpad.delete("1.0","end")with askopenfile(title="打开文件") as f:self.textpad.insert(INSERT,f.read())self.filename = f.nameprint(f.name)def savefile(self):with open(self.filename,"w") as f:c = self.textpad.get(1.0,END)f.write(c)def exit(self):root.quit()def openAskColor(self):s1 = askcolor(color = "red", title="选择背景色")self.textpad.config(bg=s1[1])def createContextMenu(self,event):self.contextMenu.post(event.x_root,event.y_root)if __name__=="__main__":root = Tk()root.geometry("500x500+250+300")root.title("简易记事本")app = Application(master=root)root.mainloop()