使用线程的 GNOME 小程序挂起

发布于 2024-08-17 19:38:57 字数 1560 浏览 4 评论 0原文

我正在尝试使用 python (pyGTK) 开发一个 GNOME 小程序（放入面板中）。我首先遵循其他SO问题中建议的教程。

我的计划是让小程序在后台以重复的方式执行某些操作（导致其显示更新）。所以我想我需要线程来完成它。我看过几个关于如何在 pyGTK 中使用线程的教程 - 大多数都遵循 pyGTK 常见问题解答。所有这些都表明要谨慎。

我尝试了不同的版本，包括。

#!/usr/bin/python

import pygtk
import sys
pygtk.require('2.0')
import gtk
import gobject
gobject.threads_init()

import gnomeapplet
import time
from threading import Thread

def threadFunction(label):
    gobject.idle_add(label.set_text, 'In the thread')

def factory(applet, iid):
        text = gtk.Label('Start %s' % iid)
        applet.add(text)
        applet.show_all()
        Thread(target=threadFunction, args=(text)).start()
        return True

if __name__ == '__main__':
        print "Starting factory"
        gnomeapplet.bonobo_factory("OAFIID:Gnome_Panel_Example_Factory", gnomeapplet.Applet.__gtype__, "Simple gnome applet example", "1.0", factory)

但这不起作用。当尝试更新演示文稿时，线程执行似乎挂起（gobject.idle_add）。我尝试：

用 gtk.gdk.threads_init() 替换 gobject.threads_init() - 因为这是一些教程使用的，
子类化 threading.Thread 类而不是使用Thread(target=)
使用 gtk.threads_enter 和 gtk.threads_leave 围绕在单独线程中运行并更新小部件的任何代码，

< strong>那我的错误是什么？

线程与小程序不兼容（与其他 pyGTK 程序相反）？

原文

I am trying to develop a GNOME applet (put into panel) using python (pyGTK). I've started by following the tutorial suggested in other SO question.

My plan is to let the applet do something in the background in a repetitive fashion (causing its display to be updated). So I thought I am gonna need threads to do it. I've seen several tutorials on how to use threads with pyGTK - most of them follow the pyGTK FAQ. And all of them suggest being cautious.

I tried with the different versions, incl.

#!/usr/bin/python

import pygtk
import sys
pygtk.require('2.0')
import gtk
import gobject
gobject.threads_init()

import gnomeapplet
import time
from threading import Thread

def threadFunction(label):
    gobject.idle_add(label.set_text, 'In the thread')

def factory(applet, iid):
        text = gtk.Label('Start %s' % iid)
        applet.add(text)
        applet.show_all()
        Thread(target=threadFunction, args=(text)).start()
        return True

if __name__ == '__main__':
        print "Starting factory"
        gnomeapplet.bonobo_factory("OAFIID:Gnome_Panel_Example_Factory", gnomeapplet.Applet.__gtype__, "Simple gnome applet example", "1.0", factory)

But it doesn't work. The thread execution seems to hang when trying to update the presentation (gobject.idle_add). I tried:

replacing gobject.threads_init() with gtk.gdk.threads_init() - because this is what some of the tutorials use,
subclassing threading.Thread class instead of using Thread(target=)
using gtk.threads_enter and gtk.threads_leave around any code that is run within a separate thread and updates the widgets,

What is my mistake then?

Is threading imcompatible with applets (as opposed to other pyGTK programs)?

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