教你如何使用Python Tkinter库制作记事本

Tkinter库制作记事本

现在为了创建这个记事本，你的系统中应该已经安装了 Python 3 和 Tkinter。您可以根据系统要求下载合适的python 包。成功安装 python 后，您需要安装 Tkinter（一个 Python 的 GUI 包）。

使用此命令安装 Tkinter ：

pip install python-tk

导入 Tkinter ：

import tkinter
import os
from tkinter import *
from tkinter.messagebox import *
from tkinter.filedialog import *

注意： messagebox用于在称为记事本的白框中写入消息，filedialog用于在您从系统中的任何位置打开文件或将文件保存在特定位置或位置时出现的对话框。

添加菜单：

# Add controls(widget) 

self.__thisTextArea.grid(sticky = N + E + S + W) 

# To open new file
self.__thisFileMenu.add_command(label = "New",
                                command = self.__newFile) 

# To open a already existing file
self.__thisFileMenu.add_command(label = "Open",
                                command = self.__openFile) 

# To save current file
self.__thisFileMenu.add_command(label = "Save",
                                command = self.__saveFile) 

# To create a line in the dialog
self.__thisFileMenu.add_separator() 

# To terminate
self.__thisFileMenu.add_command(label = "Exit",
                                command = self.__quitApplication)
self.__thisMenuBar.add_cascade(label = "File",
                               menu = self.__thisFileMenu) 

# To give a feature of cut
self.__thisEditMenu.add_command(label = "Cut",
                                command = self.__cut) 

# To give a feature of copy
self.__thisEditMenu.add_command(label = "Copy",
                                command = self.__copy) 

# To give a feature of paste
self.__thisEditMenu.add_command(label = "Paste",
                                command = self.__paste) 

# To give a feature of editing
self.__thisMenuBar.add_cascade(label = "Edit",
                               menu = self.__thisEditMenu) 

# To create a feature of description of the notepad
self.__thisHelpMenu.add_command(label = "About Notepad",
                                command = self.__showAbout)
self.__thisMenuBar.add_cascade(label = "Help",
                               menu = self.__thisHelpMenu) 

self.__root.config(menu = self.__thisMenuBar) 

self.__thisScrollBar.pack(side = RIGHT, fill = Y) 

# Scrollbar will adjust automatically
# according to the content
self.__thisScrollBar.config(command = self.__thisTextArea.yview)
self.__thisTextArea.config(yscrollcommand = self.__thisScrollBar.set)

使用此代码，我们将在记事本的窗口中添加菜单，并向其中添加复制、粘贴、保存等内容。

添加功能：

def __quitApplication(self):
    self.__root.destroy()
    # exit() 

def __showAbout(self):
    showinfo("Notepad", "Mrinal Verma") 

def __openFile(self): 

    self.__file = askopenfilename(defaultextension=".txt",
                                  filetypes=[("All Files","*.*"),
                                      ("Text Documents","*.txt")]) 

    if self.__file == "": 

        # no file to open
        self.__file = None
    else:
        # try to open the file
        # set the window title
        self.__root.title(os.path.basename(self.__file) + " - Notepad")
        self.__thisTextArea.delete(1.0,END) 

        file = open(self.__file,"r") 

        self.__thisTextArea.insert(1.0,file.read()) 

        file.close() 

def __newFile(self):
    self.__root.title("Untitled - Notepad")
    self.__file = None
    self.__thisTextArea.delete(1.0,END) 

def __saveFile(self): 

    if self.__file == None:
        #save as new file
        self.__file = asksaveasfilename(initialfile='Untitled.txt',
                                        defaultextension=".txt",
                                        filetypes=[("All Files","*.*"),
                                            ("Text Documents","*.txt")]) 

        if self.__file == "":
            self.__file = None
        else: 

            # try to save the file
            file = open(self.__file,"w")
            file.write(self.__thisTextArea.get(1.0,END))
            file.close()
            # change the window title
            self.__root.title(os.path.basename(self.__file) + " - Notepad") 

    else:
        file = open(self.__file,"w")
        file.write(self.__thisTextArea.get(1.0,END))
        file.close() 

def __cut(self):
    self.__thisTextArea.event_generate("<<Cut>>") 

def __copy(self):
    self.__thisTextArea.event_generate("<<Copy>>") 

def __paste(self):
    self.__thisTextArea.event_generate("<<Paste>>")

在这里，我们添加了记事本中所需的所有功能，您也可以添加其他功能，例如字体大小、字体颜色、粗体、下划线等。

合并后的主要代码：

import tkinter
import os
from tkinter import *
from tkinter.messagebox import *
from tkinter.filedialog import *

class Notepad:
    __root = Tk()

    # default window width and height
    __thisWidth = 300
    __thisHeight = 300
    __thisTextArea = Text(__root)
    __thisMenuBar = Menu(__root)
    __thisFileMenu = Menu(__thisMenuBar, tearoff=0)
    __thisEditMenu = Menu(__thisMenuBar, tearoff=0)
    __thisHelpMenu = Menu(__thisMenuBar, tearoff=0)

    # To add scrollbar
    __thisScrollBar = Scrollbar(__thisTextArea)
    __file = None

    def __init__(self, **kwargs):

        # Set icon
        try:
            self.__root.wm_iconbitmap("Notepad.ico")
        except:
            pass

        # Set window size (the default is 300x300)

        try:
            self.__thisWidth = kwargs['width']
        except KeyError:
            pass

        try:
            self.__thisHeight = kwargs['height']
        except KeyError:
            pass

        # Set the window text
        self.__root.title("Untitled - Notepad")

        # Center the window
        screenWidth = self.__root.winfo_screenwidth()
        screenHeight = self.__root.winfo_screenheight()

        # For left-alling
        left = (screenWidth / 2) - (self.__thisWidth / 2)

        # For right-allign
        top = (screenHeight / 2) - (self.__thisHeight / 2)

        # For top and bottom
        self.__root.geometry('%dx%d+%d+%d' % (self.__thisWidth,
                                              self.__thisHeight,
                                              left, top))

        # To make the textarea auto resizable
        self.__root.grid_rowconfigure(0, weight=1)
        self.__root.grid_columnconfigure(0, weight=1)

        # Add controls (widget)
        self.__thisTextArea.grid(sticky=N + E + S + W)

        # To open new file
        self.__thisFileMenu.add_command(label="New",
                                        command=self.__newFile)

        # To open a already existing file
        self.__thisFileMenu.add_command(label="Open",
                                        command=self.__openFile)

        # To save current file
        self.__thisFileMenu.add_command(label="Save",
                                        command=self.__saveFile)

        # To create a line in the dialog
        self.__thisFileMenu.add_separator()
        self.__thisFileMenu.add_command(label="Exit",
                                        command=self.__quitApplication)
        self.__thisMenuBar.add_cascade(label="File",
                                       menu=self.__thisFileMenu)

        # To give a feature of cut
        self.__thisEditMenu.add_command(label="Cut",
                                        command=self.__cut)

        # to give a feature of copy
        self.__thisEditMenu.add_command(label="Copy",
                                        command=self.__copy)

        # To give a feature of paste
        self.__thisEditMenu.add_command(label="Paste",
                                        command=self.__paste)

        # To give a feature of editing
        self.__thisMenuBar.add_cascade(label="Edit",
                                       menu=self.__thisEditMenu)

        # To create a feature of description of the notepad
        self.__thisHelpMenu.add_command(label="About Notepad",
                                        command=self.__showAbout)
        self.__thisMenuBar.add_cascade(label="Help",
                                       menu=self.__thisHelpMenu)

        self.__root.config(menu=self.__thisMenuBar)

        self.__thisScrollBar.pack(side=RIGHT, fill=Y)

        # Scrollbar will adjust automatically according to the content
        self.__thisScrollBar.config(command=self.__thisTextArea.yview)
        self.__thisTextArea.config(yscrollcommand=self.__thisScrollBar.set)

    def __quitApplication(self):
        self.__root.destroy()
        # exit()

    def __showAbout(self):
        showinfo("Notepad", "Mrinal Verma")

    def __openFile(self):

        self.__file = askopenfilename(defaultextension=".txt",
                                      filetypes=[("All Files", "*.*"),
                                                 ("Text Documents", "*.txt")])

        if self.__file == "":

            # no file to open
            self.__file = None
        else:

            # Try to open the file
            # set the window title
            self.__root.title(os.path.basename(self.__file) + " - Notepad")
            self.__thisTextArea.delete(1.0, END)

            file = open(self.__file, "r")

            self.__thisTextArea.insert(1.0, file.read())

            file.close()

    def __newFile(self):
        self.__root.title("Untitled - Notepad")
        self.__file = None
        self.__thisTextArea.delete(1.0, END)

    def __saveFile(self):

        if self.__file == None:
            # Save as new file
            self.__file = asksaveasfilename(initialfile='Untitled.txt',
                                            defaultextension=".txt",
                                            filetypes=[("All Files", "*.*"),
                                                       ("Text Documents", "*.txt")])

            if self.__file == "":
                self.__file = None
            else:

                # Try to save the file
                file = open(self.__file, "w")
                file.write(self.__thisTextArea.get(1.0, END))
                file.close()

                # Change the window title
                self.__root.title(os.path.basename(self.__file) + " - Notepad")

        else:
            file = open(self.__file, "w")
            file.write(self.__thisTextArea.get(1.0, END))
            file.close()

    def __cut(self):
        self.__thisTextArea.event_generate("<<Cut>>")

    def __copy(self):
        self.__thisTextArea.event_generate("<<Copy>>")

    def __paste(self):
        self.__thisTextArea.event_generate("<<Paste>>")

    def run(self):

        # Run main application
        self.__root.mainloop()

    # Run main application

notepad = Notepad(width=600, height=400)
notepad.run()

要运行此代码，请使用扩展名.py保存它，然后打开 cmd（命令提示符）并移动到保存文件的位置，然后编写以下内容

python "filename".py 

然后按回车，它就会运行。或者可以通过简单地双击您的.py扩展文件直接运行。

到此这篇关于教你如何使用Python Tkinter库制作记事本的文章就介绍到这了,更多相关Tkinter库制作记事本内容请搜索我们以前的文章或继续浏览下面的相关文章希望大家以后多多支持我们！