iFactory.Godot/BITKit/Scripts/UX/UXLineEdit.cs

using Godot;
using System;
using BITKit;

namespace BITFactory;

public partial class UXLineEdit : LineEdit
{
	[Export] private TextValidationResource textValidation;
	[Export] private RichTextLabel hints;

	public override void _Ready()
	{
		TextChanged += OnTextChanged;
	}

	private void OnTextChanged(string newText)
	{
		if (hints is null) return;
		if (textValidation is not null && textValidation.IsTextValid(newText,out var errorReason) is false)
		{
			hints.Text = $"[color=red]{errorReason}[/color]";
		}
		else
		{
			hints.Text = string.Empty;
		}
	}
}