方案二
```python
import tkinter as tk
from tkinter import messagebox
import threading
import queue
import time
def down():
for i in range(1, 100):
output_queue.put(f"Downloading attachment {i}\n")
time.sleep(0.3)
return
def on_download_click():
try:
download_thread = threading.Thread(target=down, args=())
download_thread.start()
except Exception as e:
messagebox.showerror("消息", "该日期段没有附件下载")
def update_output_text():
# 检查队列是否有新的输出内容
while not output_queue.empty():
output_text.insert(tk.END, output_queue.get())
# 如果用户没有手动滚动,或者手动滚动到底部,则自动滚动到底部
if not fm_main.manually_scrolled or output_text.yview()[1] == 1.0:
output_text.see(tk.END)
# 通过调用 after 方法实现定时刷新
fm_main.after(100, update_output_text)
def on_scroll(*args):
# 判断滚动条是否在底部
scroll_position = scrollbar.get()
if scroll_position[1] == 1.0:
fm_main.manually_scrolled = False
else:
fm_main.manually_scrolled = True
def on_mouse_release(*args):
on_scroll()
def on_key_press(event):
if event.keysym in ["Up", "Down", "Left", "Right"]:
on_scroll()
if __name__ == "__main__":
# os.chdir(path)
# os.system("ls *.zip |xargs -n1 unzip && rm *.zip")
fm_main =
tk.Tk()
fm_main.title("邮件附件批量下载_v1.0")
fm_main.geometry("600x300")
fm_main.resizable(0, 0) # 设置窗口 Continuation of the modified code:
# 下载按钮
btn1 = tk.Button(
fm_main,
text="下载",
font=("Arial", 13),
width=25,
height=2,
command=on_download_click,
)
btn1.pack()
scrollbar = tk.Scrollbar(fm_main)
scrollbar.pack(side=tk.RIGHT, fill=tk.Y)
output_text = tk.Text(fm_main, font=("Arial", 12), width=60, height=10)
output_text.pack(side=tk.LEFT, fill=tk.BOTH)
output_text.config(yscrollcommand=scrollbar.set)
scrollbar.config(command=output_text.yview)
# ... 其他代码 ...
# 创建队列对象用于线程间通信
output_queue = queue.Queue()
# 启动定时刷新函数
fm_main.after(100, update_output_text)
# 设置滚动条手动滚动的回调函数
output_text.bind("<MouseWheel>", on_scroll)
output_text.bind("<Button-4>", on_scroll)
output_text.bind("<Button-5>", on_scroll)
scrollbar.bind("<MouseWheel>", on_scroll)
scrollbar.bind("<Button-4>", on_scroll)
scrollbar.bind("<Button-5>", on_scroll)
scrollbar.bind("<B1-Motion>", on_scroll)
scrollbar.bind("<ButtonRelease-1>", on_mouse_release)
# 方向键事件绑定
fm_main.bind("<Up>", on_key_press)
fm_main.bind("<Down>", on_key_press)
fm_main.bind("<Left>", on_key_press)
fm_main.bind("<Right>", on_key_press)
# 标记手动滚动状态的变量
fm_main.manually_scrolled = False
fm_main.mainloop()
```