Pill Button

Primary CTA button in a rounded pill shape with press flash animation.

Primitives primitives button pill cta animation

Summary

PillButton is a rounded, gradient-filled call-to-action button with a flash feedback animation on press. The gradient is generated from two colors (inner and outer) into a 256 × 1 Texture2D that is set as the background image. A white overlay fades in briefly on tap to provide tactile feedback. The gradient texture is destroyed when the element detaches from the panel.

Typical use cases:

Primary call-to-action buttons (Continue, Submit, Get Started)
Form submission buttons
Prominent single-action navigation controls

Properties

Name	Description	Options
`Text`	Gets or sets the button label text.	`string`

USS Classes

Class	Description
`pillButton`	Root element.
`pillButton__background`	Gradient background layer. `border-radius: 999px`, `overflow: hidden`. Holds the gradient texture.
`pillButton__flash`	White overlay element used for the press flash effect.
`pillButton__flash--active`	Modifier that triggers a 100 ms opacity transition on the flash overlay.
`pillButton__label`	Text label element centered over the button.

Events

Name	Description	Arguments
`Clicked`	Fired when the button is tapped or clicked. The flash animation plays before this event is dispatched.	none

Public Methods

Signature	Description
`SetInnerColor(string hex)`	Sets the inner (left-edge) gradient color using a hex string (e.g. `"#e94560"`). Rebuilds the gradient texture.
`SetOuterColor(string hex)`	Sets the outer (right-edge) gradient color using a hex string. Rebuilds the gradient texture.
`SetTextColor(Color color)`	Sets the label text color.
`SetFontSize(float size)`	Sets the label font size in pixels.

Using the Control

Primary CTA

using UnityEngine;
using UnityEngine.UIElements;
using UnityUIToolkit.Extensions;

public class OnboardingFooterController : MonoBehaviour
{
    [SerializeField] private UIDocument _document;

    private PillButton _continueButton;

    private void OnEnable()
    {
        var root = _document.rootVisualElement;

        _continueButton = new PillButton();
        _continueButton.Text = "Continue";
        _continueButton.SetInnerColor("#e94560");
        _continueButton.SetOuterColor("#9b1d35");
        _continueButton.SetTextColor(Color.white);
        _continueButton.SetFontSize(16f);

        _continueButton.Clicked += OnContinueTapped;

        root.Q<VisualElement>("footer").Add(_continueButton);
    }

    private void OnContinueTapped()
    {
        Debug.Log("Continue tapped");
    }
}

Dynamic Color Update

// Reflect form validity through button color
private void UpdateButtonState(bool isValid)
{
    if (isValid)
    {
        _continueButton.SetInnerColor("#18cc6e");
        _continueButton.SetOuterColor("#0d7a42");
        _continueButton.Text = "Submit";
    }
    else
    {
        _continueButton.SetInnerColor("#555555");
        _continueButton.SetOuterColor("#333333");
        _continueButton.Text = "Fill all fields";
    }
}