Question

现在,我一直试图将这一问题分几个小时,鼓励网络,阅读文件目录。我试图单独地完成一项长期的任务,并展示在《倡议》中取得进展的进展。新的胎面已经开始,但直到主要胎盘离去为止,我已打电话到<条码>Gdk.threads_init(,然后在<条码>上填写,我用<条码>对电离星号)和/code>。

下面的法典照搬了这一问题,点击纽顿没有效果,但一旦窗户关闭,主要休息室一开始,我看看第二线工作(即,我看到印刷台半部)。

class App(Gtk.Window):

    def __init__(self):
        super(App, self).__init__()
        self.connect("destroy", self.on_destroy)

        self.layout = Gtk.VBox()
        self.progress = Gtk.ProgressBar()
        self.layout.pack_start(self.progress, False, False, 0)

        self.set_size_request(100,100)

        self.go_button = Gtk.Button("Start")
        self.go_button.connect("clicked", self.do_work_subclass)
        self.layout.pack_start(self.go_button, False, False, 0)

        self.add(self.layout)
        self.show_all()



    def on_destroy(widget, event):
        Gtk.main_quit()

    def do_work(self, widget):
        def worker_thread():
            so_far = 0
            while so_far < 10:
                time.sleep(0.5)
                print("work so far: %s" % so_far)
                Gdk.threads_enter()
                try:
                    if so_far > 0:
                        self.progress.set_fraction(so_far / 10.0)
                finally:
                    Gdk.threads_leave()
                so_far += 1
        threading.Thread(target=worker_thread).start()


if __name__ == "__main__":
    app = App()
    Gdk.threads_init()
    Gdk.threads_enter()
    Gtk.main()
    Gdk.threads_leave()

Could this be related to the fact that I am using Gtk3?

Answer 1

And having spent hours trying to find an answer before posting a question I find the solution minutes after posting. Turns out (from here) that for GTK3 you need to call GLib.threads_init(), the code works with an initial from gi.repository import GLib and a GLib.threads_init() before the call to Gtk.main(), so a working version of the code looks like this:

from gi.repository import Gtk,Gdk, GLib
import threading 
import time

class App(Gtk.Window):

    def __init__(self):
        super(App, self).__init__()
        self.connect("destroy", self.on_destroy)

        self.layout = Gtk.VBox()
        self.progress = Gtk.ProgressBar()
        self.layout.pack_start(self.progress, False, False, 0)

        self.set_size_request(100,100)

        self.go_button = Gtk.Button("Start")
        self.go_button.connect("clicked", self.do_work)
        self.layout.pack_start(self.go_button, False, False, 0)

        self.add(self.layout)
        self.show_all()



    def on_destroy(widget, event):
        Gtk.main_quit()

    def do_work(self, widget):
        def worker_thread():
            so_far = 0
            while so_far < 10:
                time.sleep(0.5)
                print("work so far: %s" % so_far)
                Gdk.threads_enter()
                try:
                    if so_far > 0:
                        self.progress.set_fraction(so_far / 10.0)
                finally:
                    Gdk.threads_leave()
                so_far += 1
        threading.Thread(target=worker_thread).start()



if __name__ == "__main__":
    app = App()
    GLib.threads_init()
    Gdk.threads_init()
    Gdk.threads_enter()
    Gtk.main()
    Gdk.threads_leave()

友情链接