Displays an icon-size spinning animation.

It is often used as an alternative to a [class@Gtk.ProgressBar] for displaying indefinite activity, instead of actual progress.

<picture> <source srcset="spinner-dark.png" media="(prefers-color-scheme: dark)"> <img alt="An example GtkSpinner" src="spinner.png"> </picture>

To start the animation, use [method@Gtk.Spinner.start], to stop it use [method@Gtk.Spinner.stop].

CSS nodes

`GtkSpinner` has a single CSS node with the name spinner. When the animation is active, the GtkSpinner:checked pseudoclass is added to this node.

Accessibility

`GtkSpinner` uses the [enum@Gtk.AccessibleRole.progress_bar] role.