Class Description AbstractProgressBar Abstract base class for the ProgressBar. AlignmentUtils Static class containing utility methods for aligning visual elements. AttachToPanelEvent Event sent after an element is added to an element that is a descendant of a panel. BackgroundPropertyHelper Helper to convert between background properties and ScaleMode. BaseBoolField A BaseBoolField is a clickable element that represents a boolean value. BaseCompositeField<T0,T1,T2> This is the base class for the composite fields. BaseField<T0> Abstract base class for controls.A BaseField is a base class for field elements like TextField and IntegerField. To align a BaseField element automatically with other fields in an Inspector window, use the .unity-base-field__aligned USS class. This style class is designed for use with Inspector elements like PropertyField, which has the style class by default. However, if you manually add a child BaseField element to a PropertyField, you must add the style class manually.When the style class is present, the field automatically calculates the label width to align with other fields in the Inspector window. If there are IMGUI fields present, UI Toolkit fields are aligned with them for consistency and compatibility. BaseFieldMouseDragger Provides the base class for field mouse draggers. BaseListView Base class for a list view, a vertically scrollable area that links to, and displays, a list of items. BaseListViewController Base collection list view controller. View controllers of this type are meant to take care of data virtualized by any BaseListView inheritor. BasePopupField<T0,T1> This is the base class for all the popup field elements. TValue and TChoice can be different, see MaskField, or the same, see PopupField BaseSlider<T0> This is a base class for the Slider fields. BaseTreeView Base class for a tree view, a vertically scrollable area that links to, and displays, a list of items organized in a tree. BaseTreeViewController Base collection tree view controller. View controllers of this type are meant to take care of data virtualized by any BaseTreeView inheritor. BaseVerticalCollectionView Base class for controls that display virtualized vertical content inside a scroll view. BindableElement Element that can be bound to a property. For more information, refer to UXML element BindableElement. Binding Base class for defining a binding. BlurEvent Event sent immediately after an element has lost focus. This event trickles down and does not bubbles up. BoundsField A Bounds editor field. For more information, refer to UXML element BoundsField. BoundsIntField A BoundsInt field. For more information, refer to UXML element BoundsIntField. Box Styled visual element to match the IMGUI Box Style. For more information, refer to UXML element Box. Button Represents an interactive UI button element. CallbackEventHandler Interface for classes capable of having callbacks to handle events. ChangeEvent<T0> Sends an event when a value in a field changes. Clickable Manipulator that tracks pointer events on an element and callbacks when the elements is clicked. ClickEvent This event is sent when the left mouse button is clicked. CollectionViewController Base collection view controller. View controllers are meant to take care of data virtualized by any BaseVerticalCollectionView inheritor. Column Represents a column in multi-column views such as multi-column list view or multi-column tree view. Provides the properties to define how user interacts with a column in a multi-column view, how its data and the data of each cell in this column are represented. Columns Represents a collection of columns. CommandEventBase<T0> Base class for command events. ContextClickEvent The event sent when clicking the right mouse button. ContextualMenuManager Use this class to display a contextual menu. ContextualMenuManipulator Manipulator that displays a contextual menu when the user clicks the right mouse button or presses the menu key on the keyboard. ContextualMenuPopulateEvent The event sent when a contextual menu requires menu items. The event trickles down and bubbles up. ConverterGroup A type to hold information about a conversion registry used locally on bindings. ConverterGroups Provides a set of static methods to register and use converter groups and registers a set of global converters. ConverterGroup. DataBinding. CustomBinding Base class for general purpose binding extensibility. CustomStyleResolvedEvent Event sent after the custom style properties of a VisualElement have been resolved. DataBinding Binding type that enables data synchronization between a property of a data source and a property of a VisualElement. DefaultMultiColumnTreeViewController<T0> Default implementation of a MultiColumnTreeViewController. DefaultTreeViewController<T0> Default implementation of a TreeViewController. DetachFromPanelEvent Event sent just before an element is detached from its parent, if the parent is the descendant of a panel. DoubleField Makes a text field for entering doubles. DragAndDropData Data stored during drag-and-drop operations, enabling information to be carried throughout the process. DragAndDropEventBase<T0> Base class for drag and drop events. DragEnterEvent Use the DragEnterEvent class to manage events that occur when dragging enters an element or one of its descendants. The DragEnterEvent does not trickle down and does not bubble up. DragExitedEvent The event sent to a dragged element when the drag and drop process ends. DragLeaveEvent Use the DragLeaveEvent class to manage events sent when dragging leaves an element or one of its descendants. The DragLeaveEvent does not trickle down and does not bubble up. DragPerformEvent The event sent to an element when another element is dragged and dropped on the element. DragUpdatedEvent The event sent when the element being dragged enters a possible drop target. DropdownField A control that allows the user to pick a choice from a list of options. For more information, refer to UXML element DropdownField. DropdownMenu Represents a dropdown menu, similar to the menus seen in most Operating Systems (OS) and across the Unity Editor. DropdownMenuAction Represents a menu action item. DropdownMenuEventInfo Provides information about the event that caused the dropdown menu to display. DropdownMenuItem Represents an item in a dropdown menu. DropdownMenuSeparator Provides a separator menu item. DynamicAtlasSettings Contains the settings used by the dynamic atlas system. Easing A collection of easing curves to be used with ValueAnimations. EnumField Makes a dropdown for switching between enum values. For more information, refer to UXML element EnumField. EventBase The base class for all UIElements events. The class implements IDisposable to ensure proper release of the event from the pool and of any unmanaged resources, when necessary. EventBase<T0> Generic base class for events, implementing event pooling and automatic registration to the event type system. EventDispatcher Dispatches events to a IPanel. EventInterestAttribute Optional attribute on overrides of CallbackEventHandler.HandleEventBubbleUp and CallbackEventHandler.HandleEventTrickleDown. Use this attribute to specify all the event types used by the method override. The event dispatcher can then safely skip events not needed for this method if they are identified internally as valid candidates for performance optimizations. ExecuteCommandEvent This event is sent by the Editor when an element in the panel should execute a command. FieldMouseDragger<T0> Provides dragging on a visual element to change a value field. FloatField Makes a text field for entering a float. For more information, refer to UXML element FloatField. Focusable Base class for objects that can get the focus. FocusChangeDirection Base class for defining in which direction the focus moves in a focus ring. FocusController Class in charge of managing the focus inside a Panel. FocusEvent Event sent immediately after an element has gained focus. This event trickles down and does not bubbles up. FocusEventBase<T0> Base class for focus related events. FocusInEvent Event sent immediately before an element gains focus. This event trickles down and bubbles up. FocusOutEvent Event sent immediately before an element loses focus. This event trickles down and bubbles up. Foldout A Foldout control is a collapsible section of a user interface. When toggled, it expands or collapses, which hides or reveals the elements it contains. GenericDropdownMenu GenericDropdownMenu allows you to display contextual menus with default textual options or any VisualElement. GeometryChangedEvent This event is sent after layout calculations, when the position or the dimension of an element changes. GroupBox This is an enclosing container for a group of IGroupBoxOption. All group options within this container will interact together to allow a single selection, using the DefaultGroupManager. Default options are RadioButton, but users can provide other implementations. If no IGroupBox is found in the hierarchy, the default container will be the panel. Hash128Field Makes a field for editing an Hash128. For more information, refer to UXML element Hash128Field. HelpBox Makes a help box with a message to the user. For more information, refer to UXML element HelpBox. IBindingExtensions Extensions methods to provide additional IBindable functionality. Image A VisualElement representing a source texture. IMGUIContainer Element that draws IMGUI content. For more information, refer to UXML element IMGUIContainer. IMGUIEvent Class used to send a IMGUI event that has no equivalent UIElements event. ImmediateModeElement VisualElement that can implement custom immediate mode rendering. INotifyValueChangedExtensions INotifyValueChangedExtensions is a set of extension methods useful for objects implementing INotifyValueChanged_1. InputEvent Sends an event when text from a TextField changes. InputSystemEventSystem Handles input and sending events to UIElements Panel through use of Unity's Input System package. IntegerField Makes a text field for entering an integer. For more information, refer to UXML element LongField. KeyboardEventBase<T0> This is the base class for keyboard events. KeyboardNavigationManipulator Provides a default implementation for translating input device specific events to higher level navigation operations as commonly possible with a keyboard. KeyDownEvent This event is sent when a key is pressed. KeyUpEvent This event is sent when a pressed key is released. Label Provides an Element displaying text. For more information, refer to UXML element Label. ListView A ListView is a vertically scrollable area that links to, and displays, a list of items. ListViewController List view controller. View controllers of this type are meant to take care of data virtualized by any ListView inheritor. LongField Makes a text field for entering long integers. For more information, refer to UXML element LongField. Manipulator Base class for all Manipulator implementations. MeshGenerationContext Provides methods for generating a visual element's visual content during the VisualElement.generateVisualContent callback. MeshWriteData Represents the vertex and index data allocated for drawing the content of a VisualElement. MinMaxSlider A min/max slider containing a representation of a range. For more information, refer to UXML element MinMaxSlider. MouseCaptureController Class that manages capturing mouse events. MouseCaptureEvent Event sent after a handler starts capturing the mouse. MouseCaptureEventBase<T0> Event sent when the handler capturing the mouse changes. MouseCaptureOutEvent Event sent before a handler stops capturing the mouse. MouseDownEvent This event is sent when a mouse button is pressed. MouseEnterEvent Event sent when the mouse pointer enters an element or one of its descendent elements. The event trickles down but does not bubble up. MouseEnterWindowEvent Event sent when the mouse pointer enters a window. The event bubbles up but does not trickle down. MouseEventBase<T0> The base class for mouse events. MouseLeaveEvent Event sent when the mouse pointer exits an element and all its descendent elements. The event trickles down but does not bubble up. MouseLeaveWindowEvent Event sent when the mouse pointer exits a window. The event bubbles up but does not trickle down. MouseManipulator MouseManipulators have a list of activation filters. MouseMoveEvent This event is sent when the mouse moves. MouseOutEvent Event sent when the mouse pointer exits an element. The event trickles down and bubbles up. MouseOverEvent Event sent when the mouse pointer enters an element. The event trickles down and bubbles up. MouseUpEvent This event is sent when a mouse button is released. MultiColumnController The default controller for a multi column view. Takes care of adding the MultiColumnCollectionHeader and reacting to the various callbacks. MultiColumnListView A list view with multi column support. For more information, refer to MultiColumnListView. MultiColumnListViewController Multi-column list view controller. View controllers of this type are meant to take care of data virtualized by any MultiColumnListView inheritor. MultiColumnTreeView A tree view with multi column support. For more information, refer to MultiColumnTreeView. MultiColumnTreeViewController Multi-column tree view controller. View controllers of this type are meant to take care of data virtualized by any MultiColumnTreeView inheritor. NavigationCancelEvent Event sent when the user presses the cancel button. NavigationEventBase<T0> Navigation events abstract base class. By default, navigation events trickle down and bubble up. Disabled elements won't receive these events. NavigationMoveEvent Event typically sent when the user presses the D-pad, moves a joystick or presses the arrow keys. NavigationSubmitEvent Event sent when the user presses the submit button. Painter2D Object to draw 2D vector graphics. PanelChangedEventBase<T0> Abstract base class for events notifying of a panel change. PanelSettings Defines a Panel Settings asset that instantiates a panel at runtime. The panel makes it possible for Unity to display UXML-file based UI in the Game view. PanelTextSettings Represents text rendering settings for a specific UI panel. PanelSettings.textSettings PointerCancelEvent This event is sent when pointer interaction is cancelled. PointerCaptureEvent Event sent when a pointer is captured by a VisualElement. PointerCaptureEventBase<T0> Base class for pointer capture events and mouse capture events. PointerCaptureHelper A static class to capture and release pointers. PointerCaptureOutEvent Event sent when a VisualElement releases a pointer. PointerDownEvent Sends when a pointer is pressed inside a visual element. PointerDownLinkTagEvent This event is sent when a pointer is pressed on a Link tag. PointerEnterEvent This event is sent when a pointer enters a VisualElement or one of its descendants. The event does not trickle down and does not bubble up. PointerEventBase<T0> Base class for all pointer-related events. PointerId A static class that holds pointer ID values. PointerLeaveEvent This event is sent when a pointer exits an element and all of its descendants. The event does not trickle down and does not bubble up. PointerManipulator PointerManipulators have a list of activation filters. PointerMoveEvent This event is sent when a pointer changes state. PointerMoveLinkTagEvent This event is sent when a pointer changes state on a link tag. PointerOutEvent This event is sent when a pointer exits an element. The event trickles down and bubbles up. PointerOutLinkTagEvent This event is sent when a pointer exits a link tag. PointerOverEvent This event is sent when a pointer enters an element. The event trickles down and bubbles up. PointerOverLinkTagEvent This event is sent when a pointer enters a link tag. PointerType A static class that holds pointer type values. PointerUpEvent This event is sent when a pointer's last pressed button is released. PointerUpLinkTagEvent This event is sent when a pointer's last pressed button is released on a link tag. PopupField<T0> Generic popup selection field. PopupWindow Styled visual text element. This element doesn't have any functionality. It's just a container with a border and a title, rather than a window or popup. For more information, refer to UXML element PopupWindow. ProgressBar A control that displays the progress between a lower and upper bound value. For more information, refer to UXML element ProgressBar. RadioButton A control that allows users to select a single option inside a RadioButtonGroup. For more information, refer to UXML element RadioButton. RadioButtonGroup A control that allows single selection out of a logical group of RadioButton elements. Selecting one will deselect the others. For more information, refer to UXML element RadioButtonGroup. RectField A Rect field. For more information, refer to UXML element RectField. RectIntField A RectInt field. For more information, refer to UXML element RectIntField. RegisterUxmlCacheAttribute Attribute allowing the UXML registry to more efficiently retrieve the UXML description data. RepeatButton A button that executes an action repeatedly while it is pressed. For more information, refer to UXML element RepeatButton. RuntimePanelUtils A collection of static methods that provide simple World, Screen, and Panel coordinate transformations. Scroller A vertical or horizontal scrollbar. For more information, refer to UXML element Scroller. ScrollView Displays its contents inside a scrollable frame. For more information, refer to the ScrollView user manual page. Slider A slider containing floating point values. SliderInt A slider containing Integer discrete values. For more information, refer to UXML element SliderInt. SortColumnDescription This represents a description on what column to sort and in which order. SortColumnDescriptions This represents a collection or SortColumnDescriptions in multi SortColumnDescription views. StyleSheet Style sheets are applied to visual elements in order to control the layout and visual appearance of the user interface. Tab Creates a tab to organize content on different screens. TabView Creates a tab view that groups a one or more Tab elements. TemplateContainer Represents the root VisualElement of UXML file. TextElement Use this as the super class if you are declaring a custom VisualElement that displays text. For example, Button or Label use this as their base class. For more information, refer to UXML element TextElement. TextField A TextField accepts and displays text input. For more information, refer to UXML element TextField. TextInputBaseField<T0> Abstract base class used for all text-based fields. TextValueField<T0> Base class for text fields. ThemeStyleSheet Represents a style sheet that's assembled from other style sheets. Toggle A Toggle is a clickable element that represents a boolean value. ToggleButtonGroup A control that allows single or multiple selection out of a logical group of Button elements. ToggleButtonGroupStatePropertiesAttribute Defines how a serialized ToggleButtonGroupState will be initialized in the inspector. TooltipEvent Event sent to find the first VisualElement that displays a tooltip. TransitionCancelEvent Event sent when a transition is canceled. TransitionEndEvent Event sent at the completion of the transition. In the case where a transition is removed before completion then the event will not fire. TransitionEventBase<T0> Transition events abstract base class. TransitionRunEvent Event sent when a transition is created (i.e. added to the set of running transitions). TransitionStartEvent Event sent when a transition's delay phase ends. TreeView A TreeView is a vertically scrollable area that links to, and displays, a list of items organized in a tree. TreeViewController Tree view controller. View controllers of this type are meant to take care of data virtualized by any TreeView inheritor. TreeViewExpansionChangedArgs A data structure for the tree view item expansion event. TwoPaneSplitView A SplitView that contains two resizable panes. One pane is fixed-size while the other pane has flex-grow style set to 1 to take all remaining space. The border between the panes is draggable to resize both panes. Both horizontal and vertical modes are supported. Requires exactly two child elements to operate. TypedUxmlAttributeDescription<T0> Base class for all the UXML specific attributes. UIDocument Defines a Component that connects VisualElements to GameObjects. UIRenderer A renderer Component that should be added next to a UIDocument Component to allow world-space rendering. This Component is added automatically by the UIDocument when the PanelSettings asset is configured in world-space. UIToolkitInputConfiguration Global configuration options for UI Toolkit input. UnsignedIntegerField Makes a text field for entering an unsigned integer. For more information, refer to UXML element UnsignedIntegerField. UnsignedLongField Makes a text field for entering unsigned long integers. For more information, refer to UXML element UnsignedLongField. UQuery UQuery is a set of extension methods allowing you to select individual or collection of visualElements inside a complex hierarchy. See UQuery manual page for further information. UQueryExtensions UQuery is a set of extension methods allowing you to select individual or collection of visualElements inside a complex hierarchy. For more information, refer to Find visual elements with UQuery. UxmlAssetAttributeDescription<T0> Describes a UXML Object attribute referencing an asset in the project. In UXML, this is referenced as a string URI. UxmlAttributeAttribute Declares that a field or property is associated with a UXML attribute. Convenience overload, shorthand for Query<T>.Build().First(). UxmlAttributeDescription Base class for describing an XML attribute. UxmlBoolAttributeDescription Describes a UXML bool attribute. UxmlChildElementDescription Describe an allowed child element for an element. UxmlColorAttributeDescription Describes a UXML attribute representing a Color as a string. UxmlDescriptionCache Contains pre-processed information about UXML attribute descriptions to avoid relying on reflection. UxmlDoubleAttributeDescription Describes a UXML double attribute. UxmlElementAttribute Declares a custom control. UxmlEnumAttributeDescription<T0> Describes a UXML attribute representing an enum as a string. UxmlEnumeration Restricts the value of an attribute to be taken from a list of values. UxmlFloatAttributeDescription Describes a UXML float attribute. UxmlHash128AttributeDescription Describes a UXML Hash128 attribute. UxmlIgnoreAttribute Used for fields that are serialized but do not come from UXML data, such as UxmlSerializedData.uxmlAssetId. UxmlIntAttributeDescription Describes a UXML int attribute. UxmlLongAttributeDescription Describes a UXML long attribute. UxmlObjectAttribute Declares that a class can be instantiated from UXML and contain UXML attributes. UxmlObjectReferenceAttribute Declares that a field or property is associated with nested UXML objects. UxmlSerializedData Generates an instance of the declaring element when the UxmlElementAttribute is used in a custom control. UxmlSerializedDataUtility This is used by the code generator when a custom control is using the UxmlElementAttribute. UxmlStringAttributeDescription Describes a UXML string attribute. UxmlTypeAttributeDescription<T0> Describes an XML System.Type attribute. UxmlTypeReferenceAttribute Provides information about the expected type when applied to a Type field or property that has the UxmlAttributeAttribute attribute. UxmlTypeRestriction Base class to restricts the value of an attribute. UxmlUnsignedIntAttributeDescription Describes a UXML uint attribute. UxmlUnsignedLongAttributeDescription Describes a UXML ulong attribute. UxmlValueBounds Restricts the value of an attribute to be within the specified bounds. UxmlValueMatches Restricts the value of an attribute to match a regular expression. ValidateCommandEvent This event is sent by the Editor while it determines whether the command will be handled by an element in the panel. ValueAnimation<T0> Implementation object for transition animations. Vector2Field A Vector2 field. For more information, refer to UXML element Vector2Field. Vector2IntField A Vector2Int field. For more information, refer to UXML element Vector2IntField. Vector3Field A Vector3 field. For more information, refer to UXML element Vector3Field. Vector3IntField A Vector3Int field. For more information, refer to UXML element Vector3IntField. Vector4Field A Vector4 field. For more information, refer to UXML element Vector4Field. VectorImage An asset that represents a vector image. VisualElement Base class for objects that are part of the UIElements visual tree. VisualElementExtensions VisualElementExtensions is a set of extension methods useful for VisualElement. VisualElementFocusChangeDirection Define focus change directions for the VisualElementFocusRing. VisualElementFocusRing Implementation of a linear focus ring. Elements are sorted according to their focusIndex. VisualTreeAsset An instance of this class holds a tree of VisualElementAsset's, created from a UXML file. Each node in the file corresponds to a VisualElementAsset. You can clone a VisualTreeAsset to create a tree of VisualElement's. Note: You can't generate a VisualTreeAsset from raw UXML at runtime. WheelEvent This event is sent when the mouse wheel moves.