This Spinner is stopped and started by pressing the spacebar.
from gi.repository import Gtk
from gi.repository import Gdk
import sys
class MyWindow(Gtk.ApplicationWindow):
# a window
def __init__(self, app):
Gtk.Window.__init__(self, title="Spinner Example", application=app)
self.set_default_size(200, 200)
self.set_border_width(30)
# a spinner
self.spinner = Gtk.Spinner()
# that by default spins
self.spinner.start()
# add the spinner to the window
self.add(self.spinner)
# event handler
# a signal from the keyboard (space) controls if the spinner stops/starts
def do_key_press_event(self, event):
# keyname is the symbolic name of the key value given by the event
keyname = Gdk.keyval_name(event.keyval)
# if it is "space"
if keyname == "space":
# and the spinner is active
if self.spinner.get_property("active"):
# stop the spinner
self.spinner.stop()
# if the spinner is not active
else:
# start it again
self.spinner.start()
# stop the signal emission
return True
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)
Gdk.keyval_name(event.keyval)
converts the key value event.keyval
into a symbolic name. The names and corresponding key values can be found here,but for instance GDK_KEY_BackSpace
becomes the string "BackSpace"
.
In this sample we used the following:
GtkSpinner
Key Values