Python记事本

超、凢脫俗 2023-09-29 22:24 30阅读 0赞

"""开发记事本"""
    from tkinter.filedialog import *
    from tkinter import *
    from tkinter.colorchooser import *
    from tkinter.filedialog 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.textpad = None  # textpad 表示 Text 文本框对象
    
            self.pack()
    
            self.createWidget()
    
        def createWidget(self):
            # 创建主菜单栏
    
            menubar = Menu(root)
            # 创建子菜单
    
            menuFile = Menu(menubar)
            menuEdit = Menu(menubar)
            menuHelp = Menu(menubar)
    
            # 将子菜单加入到主菜单栏
    
            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)
    
            # 将主菜单栏加到根窗口
    
            root["menu"] = menubar
    
            # 增加快捷键的处理
            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())
            # 文本编辑区
    
            self.textpad = Text(root, width=100, height=50)
    
            self.textpad.pack()
    
            # 创建上下菜单
            self.contextMenu = Menu(root)
            self.contextMenu.add_command(label="背景颜色", command=self.openAskColor)
    
            # 为右键绑定事件
            root.bind("<Button-3>", self.createContextMenu)
    
        def newfile(self):
            self.textpad.delete("1.0", "end")   # 把text控件中所有内容清空
            self.filename=asksaveasfilename(title="另存为",initialfile="未命名.txt",
                              filetypes=[("文本文档","*.txt")],
                              defaultextension=".txt")
            self.savefile()
    
        def openfile(self):
            self.textpad.delete("1.0", "end")
            with askopenfile(title="打开文本文件") as f:
                self.textpad.insert(INSERT, f.read())
                self.filename = 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):
            # 菜单在鼠标右键单击的坐标处显示
            self.contextMenu.post(event.x_root,event.y_root)
    
    
    if __name__ == '__main__':
        root = Tk()
        root.geometry("450x300+200+300")
        root.title("简易记事本")
        app = Application(master=root)
        root.mainloop()