Une boîte de dialogue qui affiche les messages sur le terminal en fonction de vos choix.
from gi.repository import Gtk
from gi.repository import Gio
import sys
class MyWindow(Gtk.ApplicationWindow):
# constructor for a window (the parent window) with a label
def __init__(self, app):
Gtk.Window.__init__(self, title="GMenu Example", application=app)
self.set_default_size(400, 200)
label = Gtk.Label()
label.set_text("This application goes boom!")
self.add(label)
# create the message_action (a Gio.SimpleAction) - for the window
message_action = Gio.SimpleAction.new("message", None)
# connect the signal from the action to the function message_cb()
message_action.connect("activate", self.message_cb)
# add the action to the application
app.add_action(message_action)
# callback function for the signal "activate" from the message_action
# in the menu of the parent window
def message_cb(self, action, parameter):
# a Gtk.MessageDialog
messagedialog = Gtk.MessageDialog(parent=self,
flags=Gtk.DialogFlags.MODAL,
type=Gtk.MessageType.WARNING,
buttons=Gtk.ButtonsType.OK_CANCEL,
message_format="This action will cause the universe to stop existing.")
# connect the response (of the button clicked) to the function
# dialog_response()
messagedialog.connect("response", self.dialog_response)
# show the messagedialog
messagedialog.show()
def dialog_response(self, widget, response_id):
# if the button clicked gives response OK (-5)
if response_id == Gtk.ResponseType.OK:
print("*boom*")
# if the button clicked gives response CANCEL (-6)
elif response_id == Gtk.ResponseType.CANCEL:
print("good choice")
# if the messagedialog is destroyed (by pressing ESC)
elif response_id == Gtk.ResponseType.DELETE_EVENT:
print("dialog closed or cancelled")
# finally, destroy the messagedialog
widget.destroy()
class MyApplication(Gtk.Application):
def __init__(self):
Gtk.Application.__init__(self)
def do_activate(self):
win = MyWindow(self)
win.show_all()
def quit_cb(self, action, parameter):
self.quit()
def do_startup(self):
Gtk.Application.do_startup(self)
# create a menu (a Gio.Menu)
menu = Gio.Menu()
# append a menu item with label "Message" and action "app.message"
menu.append("Message", "app.message")
# append a menu item with label "Quit" and action "app.quit"
menu.append("Quit", "app.quit")
# set menu as the menu for the application
self.set_app_menu(menu)
# a new simpleaction - for the application
quit_action = Gio.SimpleAction.new("quit", None)
quit_action.connect("activate", self.quit_cb)
self.add_action(quit_action)
app = MyApplication()
exit_status = app.run(sys.argv)
sys.exit(exit_status)
In line 18 the signal "activate" is connected to the callback function message_cb() using widget.connect(signal, callback function). See for a more detailed explanation.
Dans le constructeur de BoiteDeDialogueDemessage, nous pouvons définir les drapeaux à Gtk.DialogFlags.DESTROY_WITH_PARENT (pour la détruire si sa fenêtre parente est détruite), ou à Gtk.DialogFlags.MODAL (aucune interaction avec les autres fenêtres de l'application).
Dans le constructeur de BoiteDeDialogueDemessage, nous pouvons définir le type à Gtk.MessageType.INFO, Gtk.MessageType.WARNING, Gtk.MessageType.QUESTION, Gtk.MessageType.ERROR, Gtk.MessageType.OTHER en fonction du type de message voulu.
Dans le constructeur de BoiteDeDialogueDemessage, nous pouvons définir les boutons à Gtk.ButtonsType.NONE, Gtk.ButtonsType.OK, Gtk.ButtonsType.CLOSE, Gtk.ButtonsType.CANCEL, Gtk.ButtonsType.YES_NO, Gtk.ButtonsType.OK_CANCEL, ou n'importe quel bouton utilisant add_button() comme dans Gtk.Dialog.
Nous pouvons substituer l'image par défaut de la BoiteDeDialogueDemessage par une autre avec
image = Gtk.Image()
image.set_from_stock(Gtk.STOCK_CAPS_LOCK_WARNING, Gtk.IconSize.DIALOG)
image.show()
messagedialog.set_image(image)
where Gtk.STOCK_CAPS_LOCK_WARNING is any image from Stock Items. We could also set any image as in the Image widget, as image.set_from_file("filename.png").
La méthode format_secondary_text(« messagesecondaire ») définit un message secondaire. Le texte principal se met en gras.
Dans cet exemple, les éléments suivants sont utilisés :
GtkMessageDialog
GtkDialog
GtkWindow
GSimpleAction
GActionMap
GMenu
GtkApplication