Focus and Controller Navigation

LUI uses UI Toolkit focus and navigation events.

Focusable by default:

• Button
• Input
• Toggle
• Slider
• any element with .OnClick(...)

Use .Focusable(false) to opt out.

Lui.Button("Decorative", "...", OnClick).Focusable(false)

Use .TabIndex(...) to set order:

Lui.Button("First", "...", OnFirst).TabIndex(1)
Lui.Button("Second", "...", OnSecond).TabIndex(2)

Submit activation works for:

• buttons and native controls through UI Toolkit
• clickable divs/images through LUI’s NavigationSubmitEvent bridge

Focusable elements show a themeable focus ring. Customize with ring-* classes or use focus: variants:

Lui.Button("Delete", "bg-slate-800 ring-danger ring-4", Delete)
Lui.Button("Selected", "bg-slate-800 focus:bg-primary focus:scale-105 transition", Select)

Focus in Scroll Views

When an element receives focus, the renderer asks ancestor ScrollViews to scroll that element into view. This makes keyboard/gamepad navigation usable in long lists.

Scene Setup for Focus

Navigation input comes from the scene EventSystem, not from LuiDocumentHost.

Make sure:

• there is an EventSystem in the scene
• Unity Input System UI actions are available
• Active Input Handling includes the Input System if the project uses it