diff --git a/src/application.rs b/src/application.rs
index 1895315..a2f1509 100644
--- a/src/application.rs
+++ b/src/application.rs
@@ -1,36 +1,49 @@
-use gtk::{glib, gio};
+mod imp {
+    use crate::ui;
+    use adw::prelude::*;
+    use adw::subclass::prelude::*;
+    use gtk::glib;
 
-pub mod ffi {
-    #[repr(C)]
-    pub struct AudreyApplication {
-        pub parent_instance: adw::ffi::AdwApplication,
+    #[derive(Default)]
+    pub struct Application;
+
+    #[glib::object_subclass]
+    impl ObjectSubclass for Application {
+        const NAME: &'static str = "AudreyApplication";
+        type Type = super::Application;
+        type ParentType = adw::Application;
     }
 
-    #[repr(C)]
-    pub struct AudreyApplicationClass {
-        pub parent_class: adw::ffi::AdwApplicationClass,
+    impl ObjectImpl for Application {}
+
+    impl ApplicationImpl for Application {
+        fn activate(&self) {
+            self.parent_activate();
+            match self.obj().active_window() {
+                None => ui::Window::new(self.obj().as_ref()).present(),
+                Some(win) => win.present(),
+            }
+        }
     }
+
+    impl GtkApplicationImpl for Application {}
+
+    impl AdwApplicationImpl for Application {}
 }
 
-extern "C" {
-    fn audrey_application_get_type() -> glib::ffi::GType;
-    fn audrey_application_new() -> *mut ffi::AudreyApplication;
-}
+use gtk::{gio, glib};
 
 glib::wrapper! {
-    pub struct Application(Object<ffi::AudreyApplication, ffi::AudreyApplicationClass>)
+    pub struct Application(ObjectSubclass<imp::Application>)
         @extends adw::Application, gtk::Application, gio::Application,
         @implements gio::ActionGroup, gio::ActionMap;
-
-    match fn {
-        type_ => || audrey_application_get_type(),
-    }
 }
 
 impl Application {
     pub fn new() -> Self {
-        unsafe {
-            glib::translate::from_glib_full(audrey_application_new())
-        }
+        glib::Object::builder()
+            .property("application-id", "eu.callcc.audrey")
+            .property("flags", gio::ApplicationFlags::default())
+            .build()
     }
 }
diff --git a/src/main.rs b/src/main.rs
index 300c310..56f15c4 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,8 +1,10 @@
 mod application;
-use application::{Application};
+pub use application::Application;
+
+pub mod ui;
 
 use gtk::prelude::*;
-use gtk::{glib, gio};
+use gtk::{gio, glib};
 
 extern crate libsecret;
 
@@ -11,8 +13,7 @@ extern crate libsecret;
 #[link(name = "json-glib-1.0")]
 #[link(name = "mpv")]
 #[link(name = "soup-3.0")]
-extern "C" {
-}
+extern "C" {}
 
 fn main() -> glib::ExitCode {
     gio::resources_register_include!("audrey.gresource").expect("could not register resources");
diff --git a/src/ui.rs b/src/ui.rs
new file mode 100644
index 0000000..1a5b32a
--- /dev/null
+++ b/src/ui.rs
@@ -0,0 +1,2 @@
+mod window;
+pub use window::Window;
diff --git a/src/ui/window.rs b/src/ui/window.rs
new file mode 100644
index 0000000..12eb3d5
--- /dev/null
+++ b/src/ui/window.rs
@@ -0,0 +1,39 @@
+mod ffi {
+    use gtk::glib;
+
+    #[repr(C)]
+    pub struct UiWindow {
+        parent_instance: adw::ffi::AdwApplicationWindow,
+    }
+
+    #[repr(C)]
+    pub struct UiWindowClass {
+        parent_class: adw::ffi::AdwApplicationWindowClass,
+    }
+
+    extern "C" {
+        pub fn ui_window_get_type() -> glib::ffi::GType;
+        pub fn ui_window_new(app: *mut gtk::ffi::GtkApplication) -> *mut UiWindow;
+    }
+}
+
+use adw::prelude::*;
+use gtk::{gio, glib};
+
+glib::wrapper! {
+    pub struct Window(Object<ffi::UiWindow, ffi::UiWindowClass>)
+        @extends adw::ApplicationWindow, gtk::ApplicationWindow, gtk::Window, gtk::Widget,
+        @implements gio::ActionGroup, gio::ActionMap, gtk::Accessible, gtk::Buildable, gtk::ConstraintTarget, gtk::Native, gtk::Root, gtk::ShortcutManager;
+
+    match fn {
+        type_ => || ffi::ui_window_get_type(),
+    }
+}
+
+impl Window {
+    pub fn new(app: &impl IsA<gtk::Application>) -> Self {
+        use glib::translate::*;
+
+        unsafe { from_glib_none(ffi::ui_window_new(app.as_ref().to_glib_none().0)) }
+    }
+}