使用多线程的 Python gui 中的 Gdk-ERROR

Question

这是我的第一个post，所以如果我做错了什么，请耐心等待。
我正在开发一个用 python 编写的带有 gtk 界面的非常简单的聊天程序，一个用户有服务器，另一个有客户端。一切正常，除了我无法发送或接收消息（尽管已建立连接）。我已经在论坛中寻找解决方案，但没有找到任何东西。
GUI 的（部分）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 ())

并且在Client.py或Server.py中（是相同的行）：

class Client/Server:
    [...]
    def receive_message (self):
        try:
            msg0 = self.conn.recv (1024)
            msg = msg0.decode ("utf-8")
            return msg
        except: pass

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尝试更改 Gtk.TextView 的文本，但我不确定（我对多线程很陌生）。

感谢大家。

Answer 1

您不能从调用 Gtk.main() 的线程以外的线程调用 GTK+ 函数。您必须更改您的线程以将数据发送到主线程并修改 GUI，例如通过将对 insert_text() 的调用包装在 receive() 中的 GLib.idle_add().

使用多线程的 Python gui 中的 Gdk-ERROR

Gdk-ERROR in Python gui with Multithreading

python

sockets

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multithreading

chat