|
Packit |
1470ea |
|
|
Packit |
1470ea |
<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="combobox.py" xml:lang="es">
|
|
Packit |
1470ea |
<info>
|
|
Packit |
1470ea |
<title type="text">ComboBox (Python)</title>
|
|
Packit |
1470ea |
<link type="guide" xref="beginner.py#menu-combo-toolbar"/>
|
|
Packit |
1470ea |
<link type="seealso" xref="model-view-controller.py"/>
|
|
Packit |
1470ea |
<link type="next" xref="treeview_simple_liststore.py"/>
|
|
Packit |
1470ea |
<revision version="0.1" date="2012-06-02" status="draft"/>
|
|
Packit |
1470ea |
|
|
Packit |
1470ea |
<credit type="author copyright">
|
|
Packit |
1470ea |
<name>Marta Maria Casetti</name>
|
|
Packit |
1470ea |
<email its:translate="no">mmcasetti@gmail.com</email>
|
|
Packit |
1470ea |
<years>2012</years>
|
|
Packit |
1470ea |
</credit>
|
|
Packit |
1470ea |
|
|
Packit |
1470ea |
<desc>Un widget usado para elegir de una lista de elementos</desc>
|
|
Packit |
1470ea |
|
|
Packit |
1470ea |
<mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
|
|
Packit |
1470ea |
<mal:name>Daniel Mustieles</mal:name>
|
|
Packit |
1470ea |
<mal:email>daniel.mustieles@gmail.com</mal:email>
|
|
Packit |
1470ea |
<mal:years>2011 - 2017</mal:years>
|
|
Packit |
1470ea |
</mal:credit>
|
|
Packit |
1470ea |
|
|
Packit |
1470ea |
<mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
|
|
Packit |
1470ea |
<mal:name>Nicolás Satragno</mal:name>
|
|
Packit |
1470ea |
<mal:email>nsatragno@gmail.com</mal:email>
|
|
Packit |
1470ea |
<mal:years>2012 - 2013</mal:years>
|
|
Packit |
1470ea |
</mal:credit>
|
|
Packit |
1470ea |
|
|
Packit |
1470ea |
<mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
|
|
Packit |
1470ea |
<mal:name>Jorge González</mal:name>
|
|
Packit |
1470ea |
<mal:email>jorgegonz@svn.gnome.org</mal:email>
|
|
Packit |
1470ea |
<mal:years>2011</mal:years>
|
|
Packit |
1470ea |
</mal:credit>
|
|
Packit |
1470ea |
</info>
|
|
Packit |
1470ea |
|
|
Packit |
1470ea |
<title>ComboBox (una columna)</title>
|
|
Packit |
1470ea |
<media type="image" mime="image/png" src="media/combobox.png"/>
|
|
Packit |
1470ea |
Esta ComboBox imprime su selección en la terminal cuando cambia la cambia.
|
|
Packit |
1470ea |
|
|
Packit |
1470ea |
<links type="section"/>
|
|
Packit |
1470ea |
|
|
Packit |
1470ea |
<section id="code">
|
|
Packit |
1470ea |
<title>Código usado para generar este ejemplo</title>
|
|
Packit |
1470ea |
from gi.repository import Gtk
|
|
Packit |
1470ea |
import sys
|
|
Packit |
1470ea |
|
|
Packit |
1470ea |
distros = [["Select distribution"], ["Fedora"], ["Mint"], ["Suse"]]
|
|
Packit |
1470ea |
|
|
Packit |
1470ea |
|
|
Packit |
1470ea |
class MyWindow(Gtk.ApplicationWindow):
|
|
Packit |
1470ea |
|
|
Packit |
1470ea |
def __init__(self, app):
|
|
Packit |
1470ea |
Gtk.Window.__init__(self, title="Welcome to GNOME", application=app)
|
|
Packit |
1470ea |
self.set_default_size(200, -1)
|
|
Packit |
1470ea |
self.set_border_width(10)
|
|
Packit |
1470ea |
|
|
Packit |
1470ea |
# the data in the model, of type string
|
|
Packit |
1470ea |
listmodel = Gtk.ListStore(str)
|
|
Packit |
1470ea |
# append the data in the model
|
|
Packit |
1470ea |
for i in range(len(distros)):
|
|
Packit |
1470ea |
listmodel.append(distros[i])
|
|
Packit |
1470ea |
|
|
Packit |
1470ea |
# a combobox to see the data stored in the model
|
|
Packit |
1470ea |
combobox = Gtk.ComboBox(model=listmodel)
|
|
Packit |
1470ea |
|
|
Packit |
1470ea |
# a cellrenderer to render the text
|
|
Packit |
1470ea |
cell = Gtk.CellRendererText()
|
|
Packit |
1470ea |
|
|
Packit |
1470ea |
# pack the cell into the beginning of the combobox, allocating
|
|
Packit |
1470ea |
# no more space than needed
|
|
Packit |
1470ea |
combobox.pack_start(cell, False)
|
|
Packit |
1470ea |
# associate a property ("text") of the cellrenderer (cell) to a column (column 0)
|
|
Packit |
1470ea |
# in the model used by the combobox
|
|
Packit |
1470ea |
combobox.add_attribute(cell, "text", 0)
|
|
Packit |
1470ea |
|
|
Packit |
1470ea |
# the first row is the active one by default at the beginning
|
|
Packit |
1470ea |
combobox.set_active(0)
|
|
Packit |
1470ea |
|
|
Packit |
1470ea |
# connect the signal emitted when a row is selected to the callback
|
|
Packit |
1470ea |
# function
|
|
Packit |
1470ea |
combobox.connect("changed", self.on_changed)
|
|
Packit |
1470ea |
|
|
Packit |
1470ea |
# add the combobox to the window
|
|
Packit |
1470ea |
self.add(combobox)
|
|
Packit |
1470ea |
|
|
Packit |
1470ea |
def on_changed(self, combo):
|
|
Packit |
1470ea |
# if the row selected is not the first one, write its value on the
|
|
Packit |
1470ea |
# terminal
|
|
Packit |
1470ea |
if combo.get_active() != 0:
|
|
Packit |
1470ea |
print("You chose " + str(distros[combo.get_active()][0]) + ".")
|
|
Packit |
1470ea |
return True
|
|
Packit |
1470ea |
|
|
Packit |
1470ea |
|
|
Packit |
1470ea |
class MyApplication(Gtk.Application):
|
|
Packit |
1470ea |
|
|
Packit |
1470ea |
def __init__(self):
|
|
Packit |
1470ea |
Gtk.Application.__init__(self)
|
|
Packit |
1470ea |
|
|
Packit |
1470ea |
def do_activate(self):
|
|
Packit |
1470ea |
win = MyWindow(self)
|
|
Packit |
1470ea |
win.show_all()
|
|
Packit |
1470ea |
|
|
Packit |
1470ea |
def do_startup(self):
|
|
Packit |
1470ea |
Gtk.Application.do_startup(self)
|
|
Packit |
1470ea |
|
|
Packit |
1470ea |
app = MyApplication()
|
|
Packit |
1470ea |
exit_status = app.run(sys.argv)
|
|
Packit |
1470ea |
sys.exit(exit_status)
|
|
Packit |
1470ea |
|
|
Packit |
1470ea |
</section>
|
|
Packit |
1470ea |
|
|
Packit |
1470ea |
<section id="methods">
|
|
Packit |
1470ea |
<title>Métodos útiles para un widget «ComboBox»</title>
|
|
Packit |
1470ea |
El widget «ComboBox» está desarrollado sobre el diseño Modelo/Vista/Controlador: el Modelo almacena los datos, la Vista obtiene las notificaciones de cambio y muestra el contenido del modelo; el Controlador, finalmente, cambia el estado del modelo y le notifica a la vista los cambios. Para más información, y una lista de métodos útiles de «ComboBox» y «TreeModel», consulte la <link xref="model-view-controller.py"/>.
|
|
Packit |
1470ea |
En la línea 35 la señal «changed» se conecta a la función de retorno de llamada on_changed() usando widget.connect(señal, función de retorno de llamada) . Consulte la <link xref="signals-callbacks.py"/> para obtener una explicación más detallada.
|
|
Packit |
1470ea |
|
|
Packit |
1470ea |
</section>
|
|
Packit |
1470ea |
|
|
Packit |
1470ea |
<section id="references">
|
|
Packit |
1470ea |
<title>Referencias de la API</title>
|
|
Packit |
1470ea |
En este ejemplo se usa lo siguiente:
|
|
Packit |
1470ea |
<list>
|
|
Packit |
1470ea |
<item><link href="http://developer.gnome.org/gtk3/unstable/GtkComboBox.html">GtkComboBox</link> </item>
|
|
Packit |
1470ea |
<item><link href="http://developer.gnome.org/gtk3/unstable/GtkListStore.html">GtkListStore</link> </item>
|
|
Packit |
1470ea |
<item><link href="http://developer.gnome.org/gtk3/unstable/GtkCellRendererText.html">GtkCellRendererText</link> </item>
|
|
Packit |
1470ea |
<item><link href="http://developer.gnome.org/gtk3/unstable/GtkCellLayout.html">GtkCellLayout</link> </item>
|
|
Packit |
1470ea |
<item><link href="http://git.gnome.org/browse/pygobject/tree/gi/overrides/Gtk.py">pygobject: vinculaciones de Python para introspección de GObject</link> </item>
|
|
Packit |
1470ea |
</list>
|
|
Packit |
1470ea |
</section>
|
|
Packit |
1470ea |
</page>
|