RosettaUI

November 8, 2025 · View on GitHub

Code-based UI library for development menu for Unity

public class ExampleSimple : MonoBehaviour
{
    public string stringValue;
    public float floatValue;
    public int intValue;
    public Color colorValue;

    
    void Start()
    {
        var root = GetComponent<RosettaUIRoot>();
        root.Build(CreateElement());
    }

    Element CreateElement()
    {
        return UI.Window(nameof(ExampleSimple),
            UI.Page(
                UI.Field(() => stringValue),
                UI.Slider(() => floatValue),
                UI.Row(
                    UI.Field(() => intValue),
                    UI.Button("+", () => intValue++),
                    UI.Button("-", () => intValue--)
                ),
                UI.Field(() => colorValue)
            )
        );
    }
}

✨ Features

Undo/Redo surpport (runtime only)
Inspector-like visual editor for Gradient and AnimationCurve at runtime

Inspector-compatible Copy and Paste

🔄 Ver1 → Ver2 Migration

Please remove the RosettaUI.UIToolkit package from the Package Manager.
In Ver2, the RosettaUI.UIToolkit package is now included in the RosettaUI package.

`Keyboard.current.onTextInput`

If you are using Keyboard.current.onTextInput, be aware that it now also fires during UI operations..
Consider using KeyControl (e.g., Keyboard.current[Key.A].wasPressedThisFrame) as an alternative.

⬇️ Installation

This package uses the scoped registry feature to resolve package dependencies.

Edit > ProjectSettings... > Package Manager > Scoped Registries

Enter the following and click the Save button.

"name": "fuqunaga",
"url": "https://registry.npmjs.com",
"scopes": [ "ga.fuquna" ]

Window > Package Manager

Select MyRegistries> fuqunaga > RosettaUI and click the Install button

Input System (optional)

RosettaUI recommends using Input System.
See Tips.

Install according to the official documentation.
https://docs.unity3d.com/Packages/com.unity.inputsystem@1.5/manual/Installation.html

🚀How to use

Add Packages/RosettaUI/UIToolkit/Runtime/RosettaUIRootUIToolkit.prefab to the Hierarchy.
Write code to generate an Element instance.
Call RosettaUIRoot.Build(Element) to generate the actual UI (see ExampleSimple).

👉 Examples are available in this repository.
We recommend downloading and checking it out.

💻 Environment

Platform	Support
Windows	✔
Mac	Maybe (not tested)
Linux	Maybe (not tested)
IL2CPP	Not supported

💡️ Tips

Disable input when UI focused

During UI operations, input to the application is suppressed by replacing the keyboard, pointer, and mouse devices with dummies.

// false while RosettaUI focused
if ( Keyboard.current[Key.A].wasPressedThisFrame )
{
    // do something
}

Warning

the Keyboard.current.onTextInput event will still be called.

For LegacyInputSystem, refer to RosettaUIRoot.IsFocused().

if ( !RosettaUIRoot.IsFocused() && Input.GetKeyDown(KeyCode.A) )
{
    // do something
}

Custom Undo/Redo

Users can register custom Undo/Redo actions.
For details, try running ExampleUndo.

PrefsGUI - Accessors and GUIs for persistent preference values using a JSON file