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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="spinner.py" xml:lang="es">
<info>
<title type="text">Spinner (Python)</title>
<link type="guide" xref="beginner.py#display-widgets"/>
<link type="next" xref="progressbar.py"/>
<revision version="0.2" date="2012-06-12" status="draft"/>
<credit type="author copyright">
<name>Marta Maria Casetti</name>
<email its:translate="no">mmcasetti@gmail.com</email>
<years>2012</years>
</credit>
<desc>Una animación giratoria</desc>
<mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
<mal:name>Daniel Mustieles</mal:name>
<mal:email>daniel.mustieles@gmail.com</mal:email>
<mal:years>2011 - 2017</mal:years>
</mal:credit>
<mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
<mal:name>Nicolás Satragno</mal:name>
<mal:email>nsatragno@gmail.com</mal:email>
<mal:years>2012 - 2013</mal:years>
</mal:credit>
<mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
<mal:name>Jorge González</mal:name>
<mal:email>jorgegonz@svn.gnome.org</mal:email>
<mal:years>2011</mal:years>
</mal:credit>
</info>
<title>Spinner</title>
<media type="image" mime="image/png" src="media/spinner.png"/>
<p>Este indicador de progreso está detenido y se inicia al pulsar la barra espaciadora.</p>
<links type="section"/>
<section id="code">
<title>Código usado para generar este ejemplo</title>
<code mime="text/x-python" style="numbered">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)
</code>
<note><p><code>Gdk.keyval_name(event.keyval)</code> convierte el valor de tecla <code>event.keyval</code> en un nombre simbólico. Los nombres y los valores de tecla correspondientes pueden encontrarse <link href="http://git.gnome.org/browse/gtk+/tree/gdk/gdkkeysyms.h">aquí</link>, pero por ejemplo <code>GDK_KEY_BackSpace</code> se convierte en la cadena <code>"BackSpace"</code>.</p></note>
</section>
<section id="references">
<title>Referencias de la API</title>
<p>En este ejemplo se usa lo siguiente:</p>
<list>
<item><p><link href="http://developer.gnome.org/gtk3/unstable/GtkSpinner.html">GtkSpinner</link></p></item>
<item><p><link href="http://developer.gnome.org/gdk/stable/gdk-Keyboard-Handling.html">Valores de teclas</link></p></item>
</list>
</section>
</page>
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