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# gtk4

> **Not recommended on v0.0.27.** This version is a macOS / AppKit release. Other platforms exist in the tree; do not ship on them yet. See the [manual overview](/docs).

Generated bindings for **GTK 4**, produced by `cpc-bindgen --gobject` from GIR. The package name is `gtk4`. There is no hand-written `gtk` package.

```cplus
import "gtk4/gtk4" as gtk;

let app: gtk::Application = gtk::Application::new("org.example.Hello", 0 as u32);
let win: gtk::ApplicationWindow = gtk::ApplicationWindow::new(app);
let btn: gtk::Button = gtk::Button::new();
```

Strings are `str` (the GObject bridge allocates the C string). Handles are non-owning `{ _raw }` wrappers. Lifetime and signals live in [`gobject`](/docs/packages/gobject). The generated `gio` binding skips `g_application_run`; [`facet_gtk`](/docs/packages/facet_gtk) hand-binds the run loop.

Peers generated the same way, listed on [Packages](/docs/packages): `glib`, `gobject`, `gio`, `cairo`, `pango`, `gdk`. For GNOME widgets on top of GTK 4, see [adwaita](/docs/packages/adwaita).