<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="fr">

  <info>

    <title type="text">ComboBox (Python)</title>

    <link type="guide" xref="beginner.py#menu-combo-toolbar"/>

    <link type="seealso" xref="model-view-controller.py"/>

    <link type="next" xref="treeview_simple_liststore.py"/>

    <revision version="0.1" date="2012-06-02" status="draft"/>

    <credit type="author copyright">

      <name>Marta Maria Casetti</name>

      <email its:translate="no">mmcasetti@gmail.com</email>

      <years>2012</years>

    </credit>

    <desc>Un composant graphique utilisé pour effectuer un choix dans une liste d'éléments</desc>

    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">

      <mal:name>Luc Rebert,</mal:name>

      <mal:email>traduc@rebert.name</mal:email>

      <mal:years>2011</mal:years>

    </mal:credit>

    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">

      <mal:name>Alain Lojewski,</mal:name>

      <mal:email>allomervan@gmail.com</mal:email>

      <mal:years>2011-2012</mal:years>

    </mal:credit>

    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">

      <mal:name>Luc Pionchon</mal:name>

      <mal:email>pionchon.luc@gmail.com</mal:email>

      <mal:years>2011</mal:years>

    </mal:credit>

    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">

      <mal:name>Bruno Brouard</mal:name>

      <mal:email>annoa.b@gmail.com</mal:email>

      <mal:years>2011-12</mal:years>

    </mal:credit>

    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">

      <mal:name>Luis Menina</mal:name>

      <mal:email>liberforce@freeside.fr</mal:email>

      <mal:years>2014</mal:years>

    </mal:credit>

  </info>

  <title>ComboBox (one column)</title>

  <media type="image" mime="image/png" src="media/combobox.png"/>

  
Cette BoiteCombinee affiche votre sélection dans le terminal quand vous la modifiez.

  <links type="section"/>

  <section id="code">

    <title>Code utilisé pour générer cet exemple</title>

    from gi.repository import Gtk

import sys

distros = [["Select distribution"], ["Fedora"], ["Mint"], ["Suse"]]

class MyWindow(Gtk.ApplicationWindow):

    def __init__(self, app):

        Gtk.Window.__init__(self, title="Welcome to GNOME", application=app)

        self.set_default_size(200, -1)

        self.set_border_width(10)

        # the data in the model, of type string

        listmodel = Gtk.ListStore(str)

        # append the data in the model

        for i in range(len(distros)):

            listmodel.append(distros[i])

        # a combobox to see the data stored in the model

        combobox = Gtk.ComboBox(model=listmodel)

        # a cellrenderer to render the text

        cell = Gtk.CellRendererText()

        # pack the cell into the beginning of the combobox, allocating

        # no more space than needed

        combobox.pack_start(cell, False)

        # associate a property ("text") of the cellrenderer (cell) to a column (column 0)

        # in the model used by the combobox

        combobox.add_attribute(cell, "text", 0)

        # the first row is the active one by default at the beginning

        combobox.set_active(0)

        # connect the signal emitted when a row is selected to the callback

        # function

        combobox.connect("changed", self.on_changed)

        # add the combobox to the window

        self.add(combobox)

    def on_changed(self, combo):

        # if the row selected is not the first one, write its value on the

        # terminal

        if combo.get_active() != 0:

            print("You chose " + str(distros[combo.get_active()][0]) + ".")

        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)

  </section>

  <section id="methods">

    <title>Méthode utiles pour un élément graphique BoiteCombinee</title>

    
The ComboBox widget is designed around a Model/View/Controller design: the Model stores the data; the View gets change notifications and displays the content of the model; the Controller, finally, changes the state of the model and notifies the view of these changes. For more information and for a list of useful methods for ComboBox see <link xref="model-view-controller.py"/>.

    
In line 35 the "changed" signal is connected to the callback function on_changed() using widget.connect(signal, callback function). See <link xref="signals-callbacks.py"/> for a more detailed explanation.

  </section>

  <section id="references">

    <title>Références API</title>

    
Dans cet exemple, les éléments suivants sont utilisés :

    <list>

      <item>
<link href="http://developer.gnome.org/gtk3/unstable/GtkComboBox.html">GtkComboBox</link>
</item>

      <item>
<link href="http://developer.gnome.org/gtk3/unstable/GtkListStore.html">GtkListStore</link>
</item>

      <item>
<link href="http://developer.gnome.org/gtk3/unstable/GtkCellRendererText.html">GtkCellRendererText</link>
</item>

      <item>
<link href="http://developer.gnome.org/gtk3/unstable/GtkCellLayout.html">GtkCellLayout</link>
</item>

      <item>
<link href="http://git.gnome.org/browse/pygobject/tree/gi/overrides/Gtk.py">pygobject - Python bindings for GObject Introspection</link>
</item>

    </list>

  </section>

</page>