# Dialog (Python)

Marta Maria Casetti
mmcasetti@gmail.com 2012
Une fenêtre surgissante
Luc Rebert,
traduc@rebert.name 2011
Alain Lojewski,
allomervan@gmail.com 2011-2012
Luc Pionchon
pionchon.luc@gmail.com 2011
Bruno Brouard
annoa.b@gmail.com 2011-12
Luis Menina
liberforce@freeside.fr 2014

# Boîte de dialogue

Une boîte de dialogue avec le signal de réponse connecté à une fonction de rappel.

# Code utilisé pour générer cet exemple

from gi.repository import Gtk import sys

class MyWindow(Gtk.ApplicationWindow): # construct a window (the parent window)

def __init__(self, app): Gtk.Window.__init__(self, title="GNOME Button", application=app) self.set_default_size(250, 50)

# a button on the parent window button = Gtk.Button("Click me") # connect the signal "clicked" of the button with the function # on_button_click() button.connect("clicked", self.on_button_click) # add the button to the window self.add(button)

# callback function for the signal "clicked" of the button in the parent # window def on_button_click(self, widget): # create a Gtk.Dialog dialog = Gtk.Dialog() dialog.set_title("A Gtk+ Dialog") # The window defined in the constructor (self) is the parent of the dialog. # Furthermore, the dialog is on top of the parent window dialog.set_transient_for(self) # set modal true: no interaction with other windows of the application dialog.set_modal(True) # add a button to the dialog window dialog.add_button(button_text="OK", response_id=Gtk.ResponseType.OK) # connect the "response" signal (the button has been clicked) to the # function on_response() dialog.connect("response", self.on_response)

# get the content area of the dialog, add a label to it content_area = dialog.get_content_area() label = Gtk.Label("This demonstrates a dialog with a label") content_area.add(label) # show the dialog dialog.show_all()

def on_response(self, widget, response_id): print("response_id is", response_id) # destroy the widget (the dialog) when the function on_response() is called # (that is, when the button of the dialog has been clicked) widget.destroy()

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)

# Méthodes utiles pour un élément graphique BoiteDeDialogue

In line 16 the signal `"clicked"` is connected to the callback function `on_button_click()` using `widget.connect(signal, callback function)`. See for a more detailed explanation.

Au lieu de `set_modal(True)`, nous pouvons avoir `set_modal(False)` suivi de la méthode `set_destroy_with_parent(True)`, qui détruit la boîte de dialogue quand on ferme la fenêtre principale.

La méthode `add_button(button_text="The Answer", response_id=42)`, où `42` est un nombre entier, est une alternative à la fonction `add_button(button_text="text", response_id=Gtk.ResponseType.RESPONSE)`, où `RESPONSE` peut être l'une des valeurs `OK, CANCEL, CLOSE, YES, NO, APPLY, HELP` qui correspondent aux nombres entiers `-5, -6,..., -11`.

# Références API

Dans cet exemple, les éléments suivants sont utilisés :

GtkDialog

GtkWindow