A quick and dirty timer example. If you need to execute after a period of time use Thread.Timer(). This example uses simple thread and event to start and stop a clock in a Gtk 3 window counting up time in a label.
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk,Pango,GObject
import threading
import datetime
import time
class MyWindow(Gtk.Window):
def __init__(self):
self.timer = None
self.event = None
self.clock = '00:00:00'
Gtk.Window.__init__(self, title="Timer")
self.set_default_size(800, 450)
self.button_start = Gtk.Button(label="Start")
self.button_start.connect("clicked",self.start_timer)
self.button_stop = Gtk.Button(label="Stop")
self.button_stop.connect("clicked",self.stop_timer)
self.status = Gtk.Label()
self.status.set_text(self.clock)
# override_font is deprecated but good enough for a preview.
font = Pango.FontDescription("Tahoma 48")
self.status.override_font(font)
self.vbox = Gtk.VBox()
self.vbox.pack_start(self.button_start,False,False,5)
self.vbox.pack_start(self.button_stop,False,False,5)
self.vbox.pack_end(self.status,True,True,5)
self.add(self.vbox)
def get_time(self):
seconds = 0
while not self.event.is_set():
seconds += 1
self.clock = str(datetime.timedelta(seconds = seconds))
self.status.set_text(self.clock)
time.sleep(1)
def start_timer(self,button):
print('start')
self.timer = threading.Thread(target=self.get_time)
self.event = threading.Event()
self.timer.daemon=True
self.timer.start()
def stop_timer(self,button):
print('stop')
self.event.set()
self.timer = None
win = MyWindow()
win.connect("destroy", Gtk.main_quit)
win.show_all()
Gtk.main()