![]() You can install it from the Package Manager window in the Unity Editor under Window > Package Manager. The UI Builder package is currently in preview. UI Builder (package): The UI Builder lets you visually create and edit UI Toolkit assets such as UXML and USS files.You can find it in the Editor under Window > UI Toolkit > Debugger. Use it to explore a hierarchy of elements and get information about its underlying UXML structure and USS styles. UI Debugger: The UI debugger is a diagnostic tool that resembles a web browser’s debugging view.The UI toolkit also includes the following tools and resources to help you create UI: Although you can apply styles directly in C# files, Unity recommends using USS files. They’re similar to Cascading Style Sheets (CSS) used on the web, and support a subset of standard CSS properties. Unity Style Sheets (USS): Style sheets allow you to apply visual styles and behaviors to user interfaces.Although you can build interfaces directly in C# files, Unity recommends using UXML documents in most cases. UXML documents: Unity eXtensible Markup Language (UXML) is an HTML and XML inspired markup language that you use to define the structure of user interfaces and reusable UI templates. ![]() The UI Toolkit provides the following Asset types that you can use to build user interfaces in a way that’s similar to how you develop web applications: The UI Toolkit package is currently in preview. UI Toolkit Runtime Support (via the UI Toolkit package): Contains the components required to create runtime UI.More info See in Glossary system built directly on top of Unity’s graphics device layer. By default, the main camera in Unity renders its view to the screen. UI Renderer: A rendering The process of drawing graphics to the screen (or to a render texture).The system includes a dispatcher, a handler, a synthesizer, and a library of event types. More info See in Glossary: Communicates user interactions to elements for example, input, touch and pointer interactions, drag and drop operations, and other event types. The Event System consists of a few components that work together to send events. Event System A way of sending events to objects in the application based on input, be it keyboard, mouse, touch, or custom input. ![]() It positions elements based on layout and styling properties. Layout Engine: A layout system based on the CSS Flexbox model.Data binding system: Links properties to the controls that modify their values.You can use them as-is, customize them, or create your own controls. Controls: A library of standard UI controls such as buttons, popups, list views, and color pickers.A visual tree is an object graph, made of lightweight nodes, that holds all the elements in a window or panel. Visual tree: Defines every user interface you build with the UI Toolkit.The UI system includes the following features: It supports stylesheets, and dynamic and contextual event handling. ![]() The core of UI Toolkit is a retained-mode UI system based on recognized web technologies.
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