Version: 2023.1
UXML element Foldout
UXML element GroupBox

UXML element GradientField

The GradientField is an Editor-only control that allows you to set a color gradient from a Gradient Editor.

A GradientField control example
A GradientField control example

Create a GradientField

You can create a GradientField with UI Builder, UXML, or C#. The following C# example creates a GradientField with a default value:

var gradient = new GradientField();
gradient.value = new Gradient();
gradient.value.colorKeys = new GradientColorKey[]
{
    new GradientColorKey(Color.red, 0),
    new GradientColorKey(Color.blue, 10),
    new GradientColorKey(Color.green, 20)
};

示例

The following UXML example creates a GradientField:

[!code-xml[(External/Resources/editor_resources/Assets/Editor Default Resources/UIPackageResources/Snippets/UXML/GradientFieldSnippet.uxml)]

The following C# example illustrates some of the customizable functionalities of the GradientField:

[!code-cs[(Modules/UIElementsSamplesEditor/Snippets/GradientFieldSnippet.cs#sample)]

To try this example live in Unity, go to Window > UI Toolkit > Samples.

C# base class and namespace

C# class: GradientField
Namespace: UnityEditor.UIElements
Base class: BaseField_1

Inherited UXML attributes

This element inherits the following attributes from its base class:

名称 类型 描述
binding-path string Path of the target property to be bound.
focusable boolean True if the element can be focused.
label string The string representing the label that will appear beside the field.
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:

名称 类型 描述
content-container string Child elements are added to it, usually this is the same as the element itself.
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 Reference to the style object of this element.

Contains data computed from USS files or inline styles written to this object in C#.
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.
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 (ie. tree expanded states, scroll position, zoom level).

This is the key used to save/load the view data from the view data store. Not setting this key will disable persistence for this VisualElement.

USS classes

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

C# property USS selector 描述
ussClassName .unity-gradient-field USS class name for elements of this type.
labelUssClassName .unity-gradient-field__label USS class name for labels in elements of this type.
inputUssClassName .unity-gradient-field__input USS class name for input elements in elements of this type.
contentUssClassName .unity-gradient-field__content USS class name for the content for the gradient visual in the GradientField element.
borderUssClassName .unity-gradient-field__border USS class name for border elements in elements of this type.
ussClassName .unity-base-field USS class name of elements of this type.
labelUssClassName .unity-base-field__label USS class name of labels in elements of this type.
inputUssClassName .unity-base-field__input USS class name of input elements in elements of this type.
noLabelVariantUssClassName .unity-base-field--no-label USS class name of elements of this type, when there is no label.
labelDraggerVariantUssClassName .unity-base-field__label--with-dragger USS class name of labels in elements of this type, when there is a dragger attached on them.
mixedValueLabelUssClassName .unity-base-field__label--mixed-value USS class name of elements that show mixed values
alignedFieldUssClassName .unity-base-field__aligned USS class name of elements that are aligned in a inspector element
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.

其他资源

UXML element Foldout
UXML element GroupBox