internal event Action onUseDefaultChanged;

internal static void AddSharedDefaultSettingsFooter(VisualElement root,
    IReadOnlyList<CustomOrDefaultSetting> settings)
{
    if (settings == null || settings.Count == 0)
        return;

    var footerContainer = new VisualElement();
    var helpBox = new HelpBox("", HelpBoxMessageType.None);
    var buttonContainer = new VisualElement { style = { flexDirection = FlexDirection.RowReverse } };
    var openInputSettingsButton = new Button(InputSettingsProvider.Open)
    {
        text = EditorGUIUtility.TrTextContent("Open Input Settings").text
    };
    openInputSettingsButton.AddToClassList("open-settings-button");
    buttonContainer.Add(openInputSettingsButton);
    footerContainer.Add(helpBox);
    footerContainer.Add(buttonContainer);

    void RefreshFooter()
    {
        var namesInUse = new List<string>();
        foreach (var s in settings)
        {
            if (s.UseDefaultValue && s.DefaultComesFromInputSettings)
                namesInUse.Add(s.DefaultName);
        }
        if (namesInUse.Count > 0)
        {
            var quotedNames = new List<string>(namesInUse.Count);
            foreach (var n in namesInUse)
                quotedNames.Add($"\"{n}\"");
            var combinedNames = string.Join(", ", quotedNames);
            helpBox.text = EditorGUIUtility.TrTextContent(
                $"Uses {combinedNames} set in project-wide input settings.").text;
            footerContainer.style.display = DisplayStyle.Flex;
        }
        else
        {
            footerContainer.style.display = DisplayStyle.None;
        }
    }

    foreach (var s in settings)
        s.onUseDefaultChanged += RefreshFooter;

    RefreshFooter();
    root.Add(footerContainer);

private void ToggleUseDefaultValue(ChangeEvent<bool> evt, Action onChangedCallback)
{
    if (evt.newValue != m_UseDefaultValue)
    {
        m_SetValue(!evt.newValue ? m_GetDefaultValue() : m_DefaultInitializedValue);
        onChangedCallback.Invoke();
    }

    m_UseDefaultValue = evt.newValue;
    m_FloatField?.SetEnabled(!m_UseDefaultValue);
    onUseDefaultChanged?.Invoke();
}