十一、GUI设计-记事本程序

"""记事本程序"""

from tkinter import *from tkinter.filedialog import *from tkinter.colorchooser import *class Application(Frame):    def __init__(self, master=None):        super().__init__(master)        # super()代表的是父类的定义，而不是父类对象        self.master = master        self.pack()        self.createWidget()    def createWidget(self):        #创建主菜单        menuBar = Menu(root)        #创建子菜单        menuFile = Menu(menuBar)        menuEdit = Menu(menuBar)        menuHelp = Menu(menuBar)        #将子菜单添加到主菜单上        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)

        #添加菜单选项        menuFile.add_command(label="新建", accelerator="ctrl+n", command=self.newFile)        menuFile.add_command(label="打开", accelerator="ctrl+o", command=self.openFile)        menuFile.add_command(label="保存", accelerator="ctrl+s", command=self.saveFile)        menuFile.add_separator()  # 添加分割线        menuFile.add_command(label="退出", accelerator="ctrl+q", command=self.exit)

        #将主窗口添加到根窗口        root["menu"] = menuBar

        #编辑文本区        self.textpad = Text(root, width=600, height=30)        self.textpad.pack()

        #编辑上下菜单        self.rightMenu = Menu(root)        self.rightMenu.add_command(label="背景颜色", command=self.openAskColor)

        #绑定事件        root.bind("<Button-3>", self.createRightMenu)        root.bind("<Control-n>", lambda event: self.newFile())        root.bind("<Control-o>", lambda event: self.openFile())        root.bind("<Control-s>", lambda event: self.saveFile())        root.bind("<Control-q>", lambda event: self.exit())    def openFile(self):        self.textpad.delete(1.0, END)        with askopenfile(title="打开文本文件") as f:  #返回打开的文件对象            self.textpad.insert(INSERT, f.read())            self.filename=f.name    def newFile(self):        self.textpad.delete(1.0, END)        self.filename=asksaveasfilename(title="打开新建文件", initialfile="未命名.txt",                                        filetype=[("文本文档", "*.txt")],                                        defaultextension="*.txt") #返回的是保存的文件名        self.saveFile()

    def exit(self):        root.quit()

    def saveFile(self):        with open(self.filename, "w") as f:            f.write(self.textpad.get(1.0, END))

      #  with open(self.filename, "w") as f:       #     f.write(self.textpad.get(1.0, END))

    def openAskColor(self):        bgcolor = askcolor(color="red", title="背景颜色")        self.textpad.config(bg=bgcolor[1])

    def  createRightMenu(self, event):        self.rightMenu.post(event.x_root, event.y_root)

if __name__ == ‘__main__‘:    root = Tk()    root.geometry("600x250+200+300")    root.title("新建文本文档")    app = Application(master=root)    root.mainloop()

测试成功：

原文地址：https://www.cnblogs.com/dangjingwei/p/12284444.html