UI Components

A UI in Unreal is composed of three primary components: the UIScene, a collection of widgets, and some series of Kismet sequences. Knowing the purpose and function of each of these components is necessary to create your user interfaces.

The basic foundation of a user interface is a UIScene. When designing a UI, the very first step is to create your initial UIScene and construct the UI upon it. A UIScene is simply a collection of various functional parts, known as widgets. Widgets include such things as buttons, sliders, progress bars, and other components that create the finalized UI. It may help to think of the relationship of UIScenes to widgets as being the same as the relationship of a level to its included actors (see FIGURE 6.1).