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<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="checkbutton.py" xml:lang="gl">
<info>
<title type="text">CheckButton (Python)</title>
<link type="guide" xref="beginner.py#buttons"/>
<link type="next" xref="togglebutton.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>A toggle button in a window</desc>
<mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
<mal:name>Fran Dieguez</mal:name>
<mal:email>frandieguez@gnome.org</mal:email>
<mal:years>2012-2013.</mal:years>
</mal:credit>
</info>
<title>CheckButton</title>
<media type="image" mime="image/png" src="media/checkbutton.png"/>
<p>Este CheckButton troca o título.</p>
<links type="section"/>
<section id="code">
<title>Código usado para xerar este exemplo</title>
<code mime="text/x-python" style="numbered">from gi.repository import Gtk
import sys
class MyWindow(Gtk.ApplicationWindow):
# a window
def __init__(self, app):
Gtk.Window.__init__(self, title="CheckButton Example", application=app)
self.set_default_size(300, 100)
self.set_border_width(10)
# a new checkbutton
button = Gtk.CheckButton()
# with a label
button.set_label("Show Title")
# connect the signal "toggled" emitted by the checkbutton
# with the callback function toggled_cb
button.connect("toggled", self.toggled_cb)
# by default, the checkbutton is active
button.set_active(True)
# add the checkbutton to the window
self.add(button)
# callback function
def toggled_cb(self, button):
# if the togglebutton is active, set the title of the window
# as "Checkbutton Example"
if button.get_active():
self.set_title("CheckButton Example")
# else, set it as "" (empty string)
else:
self.set_title("")
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>Métodos útiles para o widget CheckButton</title>
<p>In line 17 the <code>"toggled"</code> signal is connected to the callback function <code>toggled_cb()</code> using <code><var>widget</var>.connect(<var>signal</var>, <var>callback function</var>)</code>. See <link xref="signals-callbacks.py"/> for a more detailed explanation.</p>
</section>
<section id="references">
<title>API References</title>
<p>Neste exemplo empregaremos o seguinte:</p>
<list>
<item><p><link href="http://developer.gnome.org/gtk3/unstable/GtkApplication.html">GtkApplication</link></p></item>
<item><p><link href="http://developer.gnome.org/gtk3/unstable/GtkApplicationWindow.html">GtkApplicationWindow</link></p></item>
<item><p><link href="http://developer.gnome.org/gtk3/unstable/GtkToggleButton.html">GtkToggleButton</link></p></item>
<item><p><link href="http://developer.gnome.org/gtk3/unstable/GtkCheckButton.html">GtkCheckButton</link></p></item>
</list>
</section>
</page>
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