为什么 Gio.Notification 没有显示在 Python 中?

Why is Gio.Notification not showing in Python?

我想使用我的 Gtk 应用程序显示通知,但是当我 运行 下面的代码时,我一切正常但通知不显示,即使我单击按钮也是如此。我尝试 运行 使用类似于 this answer 中建议的桌面文件对其进行设置,但它仍然无法正常工作。这是我的代码:

import gi
import sys

gi.require_version("Gtk", "3.0")
from gi.repository import Gio, Gtk

class App(Gtk.Application):
    
    def __init__(self, *args, **kwargs):
        Gtk.Application.__init__(self, *args, application_id="org.example.myapp", **kwargs)
        self.window = None

    def do_startup(self):
        Gtk.Application.do_startup(self)

    def do_activate(self):
        if not self.window:
            self.button = Gtk.Button(label="send notification")
            self.button.connect("clicked", self.notnotnot)
            self.window = Gtk.ApplicationWindow(application=self)
            self.window.add(self.button)
            self.window.show_all()
            self.window.present()

    def notnotnot(self, *args):
        notification = Gio.Notification()
        notification.set_body("Hello!")
        self.send_notification(None, notification)

if __name__ == "__main__":
    app = App()
    app.run(sys.argv)

这是桌面文件 org.example.myapp.desktop:

[Desktop Entry]
Type=Application
Name=My Application
Exec=python3 /home/user/programs/python/testing/SO/problem_why_is_gtk....py
Terminal=true
X-GNOME-UsesNotifications=true

我发现只要将优先级设置为高就可以显示通知。请注意 Gio.Notification.set_urgent() 已弃用。您需要使用 Gio.Notification.set_priority()。这是带有相应标记的添加行的代码:

import gi
import sys

gi.require_version("Gtk", "3.0")
from gi.repository import Gio, Gtk

class App(Gtk.Application):
    
    def __init__(self, *args, **kwargs):
        Gtk.Application.__init__(self, *args, application_id="org.example.myapp", **kwargs)
        self.window = None

    def do_startup(self):
        Gtk.Application.do_startup(self)

    def do_activate(self):
        if not self.window:
            self.button = Gtk.Button(label="send notification")
            self.button.connect("clicked", self.notnotnot)
            self.window = Gtk.ApplicationWindow(application=self)
            self.window.add(self.button)
            self.window.show_all()
            self.window.present()

    def notnotnot(self, *args):
        notification = Gio.Notification()
        notification.set_body("Hello!")
        notification.set_priority(Gio.NotificationPriority.HIGH) ### ADDED LINE
        self.send_notification(None, notification)

if __name__ == "__main__":
    app = App()
    app.run(sys.argv)

如果您在发送通知时指定字符串 ID 而不是 None (self.send_notification("my_notif_id", notification)),您稍后可以使用 self.withdraw_notification("my_notif_id").

撤回通知