Quand ce ToggleButton est activé, l'indicateur d'activité tourne.
from gi.repository import Gtk
import sys
class MyWindow(Gtk.ApplicationWindow):
# a window
def __init__(self, app):
Gtk.Window.__init__(
self, title="ToggleButton Example", application=app)
self.set_default_size(300, 300)
self.set_border_width(30)
# a spinner animation
self.spinner = Gtk.Spinner()
# with extra horizontal space
self.spinner.set_hexpand(True)
# with extra vertical space
self.spinner.set_vexpand(True)
# a togglebutton
button = Gtk.ToggleButton.new_with_label("Start/Stop")
# connect the signal "toggled" emitted by the togglebutton
# when its state is changed to the callback function toggled_cb
button.connect("toggled", self.toggled_cb)
# a grid to allocate the widgets
grid = Gtk.Grid()
grid.set_row_homogeneous(False)
grid.set_row_spacing(15)
grid.attach(self.spinner, 0, 0, 1, 1)
grid.attach(button, 0, 1, 1, 1)
# add the grid to the window
self.add(grid)
# callback function for the signal "toggled"
def toggled_cb(self, button):
# if the togglebutton is active, start the spinner
if button.get_active():
self.spinner.start()
# else, stop it
else:
self.spinner.stop()
class MyApplication(Gtk.Application):
def __init__(self):
Gtk.Application.__init__(self)
def do_activate(self):
win = MyWindow(self)
win.show_all()
def do_startup(self):
Gtk.Application.do_startup(self)
app = MyApplication()
exit_status = app.run(sys.argv)
sys.exit(exit_status)
In line 22 the signal "toggled" is connected to the callback function toggled_cb() using widget.connect(signal, callback function). See for a more detailed explanation.
Dans cet exemple, les éléments suivants sont utilisés :
GtkToggleButton
GtkWidget
GtkSpinner