Tres «RadioButton». Puede ver en la terminal si están activados o no.
from gi.repository import Gtk
import sys
class MyWindow(Gtk.ApplicationWindow):
def __init__(self, app):
Gtk.Window.__init__(self, title="RadioButton Example", application=app)
self.set_default_size(250, 100)
self.set_border_width(20)
# a new radiobutton with a label
button1 = Gtk.RadioButton(label="Button 1")
# connect the signal "toggled" emitted by the radiobutton
# with the callback function toggled_cb
button1.connect("toggled", self.toggled_cb)
# another radiobutton, in the same group as button1
button2 = Gtk.RadioButton.new_from_widget(button1)
# with label "Button 2"
button2.set_label("Button 2")
# connect the signal "toggled" emitted by the radiobutton
# with the callback function toggled_cb
button2.connect("toggled", self.toggled_cb)
# set button2 not active by default
button2.set_active(False)
# another radiobutton, in the same group as button1,
# with label "Button 3"
button3 = Gtk.RadioButton.new_with_label_from_widget(
button1, "Button 3")
# connect the signal "toggled" emitted by the radiobutton
# with the callback function toggled_cb
button3.connect("toggled", self.toggled_cb)
# set button3 not active by default
button3.set_active(False)
# a grid to place the buttons
grid = Gtk.Grid.new()
grid.attach(button1, 0, 0, 1, 1)
grid.attach(button2, 0, 1, 1, 1)
grid.attach(button3, 0, 2, 1, 1)
# add the grid to the window
self.add(grid)
# callback function
def toggled_cb(self, button):
# a string to describe the state of the button
state = "unknown"
# whenever the button is turned on, state is on
if button.get_active():
state = "on"
# else state is off
else:
state = "off"
# whenever the function is called (a button is turned on or off)
# print on the terminal which button was turned on/off
print(button.get_label() + " was turned " + state)
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)
En la línea 16, la señal «toggled»
se conecta a la función de retorno de llamada toggled_cb()
usando widget.connect(señal, función de retorno de llamada)
. Consulte la para una explicación más detallada.
Como se vio en la , en lugar de button1 = Gtk.RadioButton(label="Button 1")
se podría crear el botón y su etiqueta con
button1 = Gtk.RadioButton()
button1.set_label("Button 1").
Otra manera de crear un «RadioButton» nuevo con una etiqueta es button1 = Gtk.RadioButton.new_with_label(None, "Button 1")
(El primer argumento es el grupo de botones de radio, que puede obtener con get_group()
, el segundo argumento es la etiqueta).
En este ejemplo se usa lo siguiente:
GtkWindow
GtkGrid
GtkRadioButton