Python使用Tkinter打造一个完整的桌面应用

import tkinter as tk
from tkinter import ttk, messagebox, filedialog
 
root = tk.Tk()
root.title("极简记事本")
root.geometry("800x600")
 
# 创建文本编辑区
text_area = tk.Text(root, wrap=tk.WORD)
text_area.pack(fill=tk.BOTH, expand=True, padx=5, pady=5)
 
# 添加滚动条
scrollbar = tk.Scrollbar(root, command=text_area.yview)
scrollbar.pack(side=tk.RIGHT, fill=tk.Y)
text_area.config(yscrollcommand=scrollbar.set)

menubar = tk.Menu(root)
 
# 文件菜单
file_menu = tk.Menu(menubar, tearoff=0)
file_menu.add_command(label="新建", command=lambda: text_area.delete(1.0, tk.END))
file_menu.add_command(label="打开", command=lambda: open_file())
file_menu.add_command(label="保存", command=lambda: save_file())
file_menu.add_separator()
file_menu.add_command(label="退出", command=root.quit)
menubar.add_cascade(label="文件", menu=file_menu)
 
root.config(menu=menubar)

def open_file():
    filepath = filedialog.askopenfilename(
        filetypes=[("文本文件", "*.txt"), ("所有文件", "*.*")]
    )
    if filepath:
        with open(filepath, "r", encoding="utf-8") as f:
            text_area.delete(1.0, tk.END)
            text_area.insert(tk.END, f.read())

# 绑定快捷键
root.bind("<Control-s>", lambda e: save_file())
 
# 按钮点击事件
def change_font():
    new_font = ("宋体", 12) if text_area.cget("font") == ("Arial", 10) else ("Arial", 10)
    text_area.config(font=new_font)
 
font_btn = ttk.Button(root, text="切换字体", command=change_font)
font_btn.pack(side=tk.LEFT, padx=5)

status_bar = tk.Label(root, text="就绪", bd=1, relief=tk.SUNKEN, anchor=tk.W)
status_bar.pack(side=tk.BOTTOM, fill=tk.X)
 
def update_status(event=None):
    pos = text_area.index(tk.INSERT)
    status_bar.config(text=f"行:{pos.split('.')[0]} 列:{pos.split('.')[1]}")
 
text_area.bind("<KeyRelease>", update_status)

def find_text():
    search_top = tk.Toplevel(root)
    search_top.title("查找")
    
    entry = tk.Entry(search_top, width=30)
    entry.pack(pady=5)
    
    def do_search():
        target = entry.get()
        content = text_area.get(1.0, tk.END)
        pos = content.find(target, text_area.index(tk.INSERT))
        if pos != -1:
            text_area.mark_set(tk.INSERT, f"{pos + len(target)}.0")
            text_area.see(tk.INSERT)
    
    tk.Button(search_top, text="查找下一个", command=do_search).pack()

import configparser
 
config = configparser.ConfigParser()
config.read("settings.ini")
 
def save_config():
    config.set("preferences", "font", text_area.cget("font"))
    with open("settings.ini", "w") as f:
        config.write(f)