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<?xml version="1.0" encoding="utf-8"?>
<page xmlns="http://projectmallard.org/1.0/" xmlns:its="http://www.w3.org/2005/11/its" xmlns:xi="http://www.w3.org/2001/XInclude" type="guide" style="task" id="radiobutton.py" xml:lang="sv">
<info>
<title type="text">RadioButton (Python)</title>
<link type="guide" xref="beginner.py#buttons"/>
<link type="seealso" xref="grid.py"/>
<link type="next" xref="buttonbox.py"/>
<revision version="0.1" date="2012-05-09" status="draft"/>
<credit type="author copyright">
<name>Marta Maria Casetti</name>
<email its:translate="no">mmcasetti@gmail.com</email>
<years>2012</years>
</credit>
<desc>Ömsesidigt uteslutande knappar.</desc>
<mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
<mal:name>Sebastian Rasmussen</mal:name>
<mal:email>sebras@gmail.com</mal:email>
<mal:years>2019</mal:years>
</mal:credit>
<mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
<mal:name>Anders Jonsson</mal:name>
<mal:email>anders.jonsson@norsjovallen.se</mal:email>
<mal:years>2021</mal:years>
</mal:credit>
</info>
<title>RadioButton</title>
<media type="image" mime="image/png" src="media/radiobutton.png"/>
<p>Three RadioButtons. You can see in the terminal if they are turned off or on.</p>
<links type="section"/>
<section id="code">
<title>Kod som använts för att generera detta exempel</title>
<code mime="text/x-python" style="numbered">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)
</code>
</section>
<section id="methods">
<title>Användbara metoder för en RadioButton-komponent</title>
<p>På rad 16 ansluts signalen <code>"toggled"</code> till återanropsfunktionen <code>toggled_cb()</code> med <code><var>komponent</var>.connect(<var>signal</var>, <var>återanropsfunktion</var>)</code>. Se <link xref="signals-callbacks.py"/> för en utförligare förklaring.</p>
<p>Som kan ses i <link xref="properties.py"/>, skulle vi istället för <code>button1 = Gtk.RadioButton(label="Knapp 1")</code> kunna skapa knappen och etikettera den med</p>
<code>
button1 = Gtk.RadioButton()
button1.set_label("Knapp 1").</code>
<p>Ännu ett annat sätt att skapa en ny RadioButton med en etikett är <code>button1 = Gtk.RadioButton.new_with_label(None, "Knapp 1")</code> (det första argumentet är radioknapparnas grupp, vilken vi kan få med <code>get_group()</code>, det andra argumentet är etiketten).</p>
</section>
<section id="references">
<title>API-referenser</title>
<p>I detta exempel använde vi följande:</p>
<list>
<item><p><link href="http://developer.gnome.org/gtk3/unstable/GtkWindow.html">GtkWindow</link></p></item>
<item><p><link href="http://developer.gnome.org/gtk3/unstable/GtkGrid.html">GtkGrid</link></p></item>
<item><p><link href="http://developer.gnome.org/gtk3/unstable/GtkRadioButton.html">GtkRadioButton</link></p></item>
</list>
</section>
</page>
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