UIFocus

UIFocus is a system designed to manage which user interface element currently has the user's attention or is eligible to receive input. In many graphical user interfaces, only one element can be actively focused at a time. This focus dictates where keyboard events, controller inputs, or other directional navigation will be directed. For example, when a button is focused, pressing the "Enter" key will typically activate that button. Similarly, using arrow keys on a remote control or gamepad will move the focus to an adjacent interactive element.

The concept of focus is crucial for accessibility, allowing users who cannot use a mouse to navigate and interact with an application using only a keyboard or other input devices. Different platforms and operating systems have their own implementations of focus management, often with subtle variations in how focus is visually indicated and how it transitions between elements. Developers must consider focus management when building applications to ensure a consistent and usable experience for all users. Common UI elements that can receive focus include buttons, text fields, links, and menu items. The absence of focus on any interactive element means that direct input will not be received by any specific UI component.