多线程Python Gui中的GdkERROR

Question

这是我的第一篇文章，所以如果我做错了什么，请耐心等待。
我正在开发一个非常简单的聊天程序，用python编写，有一个gtk接口，一个用户拥有服务器，另一个用户拥有客户端。一切正常，除了我不能发送或接收消息（尽管连接已建立）。我已经在论坛上找到了解决办法，但是我没有找到任何东西。
（部分）GUI的代码是：

gi.require_version ('Gtk', '3.0')
from gi.repository import Gtk, Gdk, GObject, GLib
class GUI:
    def __init__ (self, is_server):
        GObject.threads_init ()
        [...]
        self.buffer1 = Gtk.TextBuffer ()
        self.text_box = Gtk.TextView (buffer=self.buffer1)
        self.text_box.set_editable (False)
        [...]
        self.th = threading.Thread (target = self.receive)
        self.th.daemon = True
        self.th.start ()
        Gtk.main ()
    def receive (self):
        while (True):
            try:
                msg = self.socket.receive_message ()
                if (msg != ""): self.insert_text (msg)
            except: pass
    def insert_text (self, text):
        self.text_box.set_editable (True)
        end_iter = self.buffer1.get_end_iter ()
        try: self.buffer1.insert (end_iter, text + "\n")
        except: pass
        self.text_box.set_editable (False)
        adj = self.scr.get_vadjustment ()
        adj.set_value (adj.get_upper ())

在客户端.py或者服务器.py（是相同的行）：

^{pr2}$

我收到的错误是：

(Chat.py:61330): Gdk-ERROR **: The program 'Chat.py' received an X Window System error.
This probably reflects a bug in the program.
The error was 'BadRequest (invalid request code or no such operation)'.
   (Details: rerial 892 error_code 1 request_code 0 (core protocol) minor_code 0)
   (Note to programmers: normally, X errors are reported asynchronously;
    that is, you will receive the error a while after causing it.
    To debug your program, run it with the GDK_SYNCHRONIZE environment
    variable to change this behavior. You can get a meaningful
    backtrace from your debugger if you break on the gdk_x_error() function.)
Trace/BPT trap (code dumped)

我认为这是一个多线程错误，因为在第二个线程中，我试图更改Gtk.text视图但我不太确定（我对多线程很陌生）。在

感谢大家。在

Answer 1

不能从调用Gtk.main()的线程调用GTK+函数。您必须更改线程以将数据发送到主线程，并让主线程修改GUI，例如，将对receive()中的insert_text()的调用包装在GLib.idle_add()中。在