Function focusable 

pub fn focusable(theme: &Theme, handle: &FocusHandle, el: Div) -> Div

Put a stateless control into the tab order, show when it holds focus, and let enter/space press it.

The ring is the same one crate::input::TextField paints — the border in Theme::ring — so a focused button and a focused field read alike.

Keyboard focus only, like CSS :focus-visible. A control also takes focus when clicked, and a ring that landed on it there would outline a slider for the whole drag — the pointer already says which control is being used.

It lands on the control’s own border, which is why every control in crate::widgets carries one even where it paints nothing: gpui sizes border-box, so a border that only appeared on focus would move the content under it by a pixel. A ring wrapped around the control instead would cost every one of them a radius parameter, and would prise a focused tab off the hairline its underline has to overlap.

Pressing dispatches Activate. Use pressable to route it and a click through one callback, or handle it separately for custom interaction.