GroupBox

A GroupBox is a container element for a logical group of multiple visual elementsA node of a visual tree that instantiates or derives from the C# VisualElement class. You can style the look, define the behaviour, and display it on screen as part of the UI. More info
See in Glossary. You can use a combination of GroupBox and RadioButton if you want to have multiple groups of options in the same panel.

If you want to treat your group of radio buttons as a single field, use RadioButtonGroup. In most cases, it’s better to use RadioButtonGroup because you must register every single radio button when you use the GroupBox and RadioButton combo. However, use the combo if you want to add additional visual elements in the group.

A group box with two radio buttons, an input text field, and a button.

Create a GroupBox with C# script

The following C# code snippets create a GroupBox and add three radio buttons to it so that they’re logically grouped.

var group = new GroupBox("Group Example");
// Must register change events on each radio button.
var choice1 = new RadioButton("First Choice");
choice1.RegisterValueChangedCallback(v => Debug.Log("Choice 1 is : " + v.newValue));
var choice2 = new RadioButton("Second Choice");
choice2.RegisterValueChangedCallback(v => Debug.Log("Choice 2 is : " + v.newValue));
var choice3 = new RadioButton("Third Choice");
choice3.RegisterValueChangedCallback(v => Debug.Log("Choice 3 is : " + v.newValue));
group.Add(choice1);
group.Add(choice2);
group.Add(choice3);
rootVisualElement.Add(group);

C# class and namespace

C# class: GroupBox
Namespace: UnityEngine.UIElements
Base class: BindableElement

Member UXML attributes

This element has the following member attributes:

Name	Type	Description
`text`	`string`	The title text of the box.

Inherited UXML attributes

This element inherits the following attributes from its base class:

Name	Type	Description
`binding-path`	`string`	Path of the target property to be bound.
`focusable`	`boolean`	True if the element can be focused.
`tabindex`	`int`	An integer used to sort focusables in the focus ring. Must be greater than or equal to zero.

This element also inherits the following attributes from VisualElement:

Name	Type	Description
`content-container`	`string`	Child elements are added to it, usually this is the same as the element itself.
`data-source`	`Object`	Assigns a data source to this VisualElement which overrides any inherited data source. This data source is inherited by all children.
`data-source-path`	`string`	Path from the data source to the value.
`data-source-type`	`System.Type`	The possible type of data source assignable to this VisualElement. This information is only used by the UI Builder as a hint to provide some completion to the data source path field when the effective data source cannot be specified at design time.
`language-direction`	`UIElements.LanguageDirection`	Indicates the directionality of the element’s text. The value will propagate to the element’s children. Setting the languageDirection to RTL adds basic support for right-to-left (RTL) by reversing the text and handling linebreaking and word wrapping appropriately. However, it does not provide comprehensive RTL support, as this would require text shaping, which includes the reordering of characters, and OpenType font feature support. Comprehensive RTL support is planned for future updates, which will involve additional APIs to handle language, script, and font feature specifications. To enhance the RTL functionality of this property, users can explore available third-party plugins in the Unity Asset Store and make use of `ITextElementExperimentalFeatures.renderedText`
`name`	`string`	The name of this VisualElement. Use this property to write USS selectors that target a specific element. The standard practice is to give an element a unique name.
`picking-mode`	`UIElements.PickingMode`	Determines if this element can be pick during mouseEvents or `IPanel.Pick` queries.
`style`	`string`	Sets the `VisualElement` style values.
`tooltip`	`string`	Text to display inside an information box after the user hovers the element for a small amount of time. This is only supported in the Editor UI(User Interface) Allows a user to interact with your application. Unity currently supports three UI systems. More info See in Glossary.
`usage-hints`	`UIElements.UsageHints`	A combination of hint values that specify high-level intended usage patterns for the `VisualElement`. This property can only be set when the `VisualElement` is not yet part of a `Panel`. Once part of a `Panel`, this property becomes effectively read-only, and attempts to change it will throw an exception. The specification of proper `UsageHints` drives the system to make better decisions on how to process or accelerate certain operations based on the anticipated usage pattern. Note that those hints do not affect behavioral or visual results, but only affect the overall performance of the panel and the elements within. It’s advised to always consider specifying the proper `UsageHints`, but keep in mind that some `UsageHints` might be internally ignored under certain conditions (e.g. due to hardware limitations on the target platform).
`view-data-key`	`string`	Used for view data persistence, such as tree expanded states, scroll position, or zoom level. This key is used to save and load the view data from the view data store. If you don’t set this key, the persistence is disabled for the associated `VisualElement`. For more information, refer to View data persistence.

USS classes

The following table lists all the C# public property names and their related USS selector.

C# property	USS selector	Description
`ussClassName`	`.unity-group-box`	USS class name for GroupBox elements. Unity adds this USS class to every instance of the GroupBox element. Any styling applied to this class affects every GroupBox located beside, or below the stylesheet in the visual tree.
`labelUssClassName`	`.unity-group-box__label`	USS class name for Labels in GroupBox elements. Unity adds this USS class to the `Label` sub-element of the `GroupBox` if the GroupBox has a Label.
`disabledUssClassName`	`.unity-disabled`	USS class name of local disabled elements.

You can also use the Matching Selectors section in the Inspector or the UI Toolkit Debugger to see which USS selectors affect the components of the VisualElement at every level of its hierarchy.

Additional resources

GradientField

Hash128Field

Unity Manual