目前正在开发一个使用Glade for GTK + 3的相对复杂的GUI，并且没有理解连接按钮和信号的“how to-s”的问题，而且我对线程非常了解。
这是我的应用程序的简化版本的代码，其中线程正在运行：
#!/usr/bin/env python
import threading,logging
from gi.repository import Gtk,GObject,Gdk
import os
import time
logging.basicConfig(level=logging.DEBUG,
format='[%(levelname)s] (%(threadName)-10s) %(message)s',
)
Path=os.path.dirname(os.path.realpath(__file__))
GObject.threads_init()
class MyThread(threading.Thread,GObject.GObject):
__gsignals__ = {
"completed": (
GObject.SIGNAL_RUN_LAST, GObject.TYPE_NONE, [])
}
def __init__(self,*args):
threading.Thread.__init__(self)
GObject.GObject.__init__(self)
self.cancelled = False
self.name = args[0]
self.setName("%s" % self.name)
def run(self):
print "Running %s" % str(self)
#actual work thread is doing----------
time.sleep(3)
#--------------------------------------
logging.debug("Emiting signal...")
GObject.idle_add(self.emit,"completed")
logging.debug("Thread ending...")
logging.debug("Done.")
class GUI(object):
def __init__(self):
#build the GUI
window = Gtk.Window()
window.set_default_size(200, 200)
vbox = Gtk.VBox(False, 5)
hbox = Gtk.HBox(True, 5)
self.spinner = Gtk.Spinner()
self.button = Gtk.Button('Start')
window.connect('destroy', Gtk.main_quit)
self.button.connect('clicked', self.startAnimation)
window.add(vbox)
vbox.pack_start(Gtk.Label("Something"), False, False, 0)
vbox.pack_start(self.spinner, True, True, 0)
vbox.pack_end(hbox, False, False, 0)
hbox.pack_start(self.button,True,True,0)
window.show_all()
Gtk.main()
def startAnimation(self,*args):
self.button.set_sensitive(False)
self.spinner.start()
thread=MyThread("Tsat_thread")
thread.connect("completed",self.completed_thread)
thread.start()
def completed_thread(self,*args):
#the subprocess call ended successfully so we can continue without problems
#updating the result of the capture
logging.debug("Function called at ending thread...")
print "COMPLETED signal catched"
self.spinner.stop()
self.spinner.props.visible=False
logging.debug("Done.")
print "Start of main GUI"
gui = GUI()
#print "mostro la finestra"
创建一个线程来管理外部进程，否则会冻结接口。当线程完成时，会发出一个“已完成”信号并从MainThread中捕获（据我所知，这是唯一一个可以访问窗口并应用更改的人） 这是该计划的输出：
Start of main GUI
Running MyThread(Tsat_thread, started 139636004558592)
[DEBUG] (Tsat_thread) Emiting signal...
[DEBUG] (Tsat_thread) Thread ending...
[DEBUG] (Tsat_thread) Done.
[DEBUG] (MainThread) Function called at ending thread...
COMPLETED signal catched
[DEBUG] (MainThread) Done.
当我在我的应用程序上尝试相同的方法时，“完成”信号不会从MainThread中捕获。我想知道问题出在哪里。代码的相关部分不起作用：
import subprocess,threading,logging
from gi.repository import Gtk,GObject,Gdk
import os,datetime
import timeit
logging.basicConfig(level=logging.DEBUG,
format='[%(levelname)s] (%(threadName)-10s) %(message)s',
)
Path=os.path.dirname(os.path.realpath(__file__))
GObject.threads_init()
...
class MyThread(threading.Thread,GObject.GObject):
__gsignals__ = {
"completed": (
GObject.SIGNAL_RUN_LAST, GObject.TYPE_NONE, [])
}
def __init__(self,*args):
threading.Thread.__init__(self)
GObject.GObject.__init__(self)
self.cancelled = False
self.name = args[0]
self.interface=args[1]
self.duration=args[2]
self.conf_tstat=args[3]
self.setName("%s" % self.name)
def run(self):
print "Running %s" % str(self)
#------------------------------------------------------------
local_conf_file=self.conf_tstat.replace(Path,".")
cmd = "dumpcap -a duration:"+self.duration+" -i "+self.interface+" -P -w - |tstat s capture -N "+local_conf_file+" stdin"
time=datetime.datetime.now().strftime('%H_%M_%d_%b_%Y')
with open("temp_log","wb") as logfile:
logfile.write(time+".out\n")
process = subprocess.Popen(cmd, shell=True, universal_newlines=True, stdout=logfile)
process.wait()
#------------------------------------------------------------------
logging.debug("Emiting signal...")
GObject.idle_add(self.emit,"completed")
logging.debug("Thread ending...")
logging.debug("Done.")
...
# On button execute clicking
def on_button_execute_clicked(self, *args):
if (self.builder.get_object("radio_online").get_active()):
print "#Online"
self.builder.get_object("spinner1").start()
self.builder.get_object("spinner1").props.visible=True
entries=self.get_entries()
thread=MyThread("Tsat_thread",entries[0],entries[1],entries[2])
thread.connect("completed",self.completed_tstat)
thread.start()
else:
print "#Offline"
...
...
#function called after Tstat_thread finishes
def completed_tstat(self,*args):
#the subprocess call ended successfully so we can continue without problems
#updating the result of the capture
logging.debug("Function called at ending thread...")
print "COMPLETED signal catched"
with open("temp_log","rb") as logfile:
capture_no=logfile.readline()
capture_no=capture_no.strip('\n')
self.builder.get_object("capture_entry").set_text(Path+"/capture/"+capture_no)
self.list_of_entries = ["capture_entry","output_entry"]
entries = self.get_entries()
if entries[1]=='':
#default output folder
self.builder.get_object("output_entry").set_text(Path+"/output")
entries= self.get_entries()
#deleting possible results from a previous capture
rm="rm -f "+entries[1]+"/log_* "+entries[1]+"/outLog.*"
subprocess.call(rm.split(),shell=False)
#triminng the info from the tstat log files
command="python ./python/trimInfo.py -t "+entries[0]+ "/log_tcp_complete, "+entries[0]+ "/log_tcp_nocomplete -u "+entries[0]+"/log_udp_complete -o "+entries[1]
process=subprocess.Popen(command.split(),shell=False,stdout=subprocess.PIPE)
process.wait()
returncode=process.poll()
if(returncode==0):
self.builder.get_object("entry_output_folder").set_text(entries[1])
self.builder.get_object("button_show_out_folder").props.sensitive=True
self.show_info("Capture+Transformation of traffic data ended successfully!")
self.set_page_complete()
else:
self.my_log+=returncode
self.handle_program_error(my_log)
self.builder.get_object("spinner1").stop()
self.builder.get_object("spinner1").props.visible=False
logging.debug("Done.")
completed_tstat是回调，但我的应用程序从未调用过。我尝试多线程时应用程序的输出如下：`
Start of main GUI
#Online
device_entry= 'wlan0'
time_spinbutton= '10'
tstat_conf_entry= './codicePippo/tstat-2.3/tstat-conf/net.private'
capture_entry= './capture/'
output_entry= './output'
Running <MyThread(Tsat_thread, started 140689548355328)>
Capturing on wlan0
File: -
Packets: 6
Packets: 7
Packets: 10
Packets: 13
Packets: 14
Packets: 15
Packets: 20
Packets: 23
Packets: 24
Packets captured: 24
Packets received/dropped on interface wlan0: 24/0 (100.0%)
WARN: This udp flow is neither incoming nor outgoing: src - 192.168.1.27; dst - 192.168.1.255!
[DEBUG] (Tsat_thread) Emiting signal...
[DEBUG] (Tsat_thread) Thread ending...
[DEBUG] (Tsat_thread) Done.
答案 0 :(得分：2)
我建议避免使用线程和子进程，我前面发布的这个答案使用的是异步调用，它是为pygobject（内省）编写的，但它应该很容易移植到pygtk