ShowWhenAttribute.cs

using System;
using UnityEngine;

// source: https://gist.github.com/deebrol/02f61b7611fd4eca923776077b92dfc2
/// <summary>
/// Attribute used to show or hide the Field depending on certain conditions
/// </summary>
[AttributeUsage(AttributeTargets.Field, AllowMultiple = false, Inherited = true)]
public class ShowWhenAttribute : PropertyAttribute {

	public readonly string conditionFieldName;
	public readonly object comparationValue;
	public readonly object[] comparationValueArray;

	/// <summary>
	/// Attribute used to show or hide the Field depending on certain conditions
	/// </summary>
	/// <param name="conditionFieldName">Name of the bool condition Field</param>
	public ShowWhenAttribute(string conditionFieldName) {
		this.conditionFieldName = conditionFieldName;
	}

	/// <summary>
	/// Attribute used to show or hide the Field depending on certain conditions
	/// </summary>
	/// <param name="conditionFieldName">Name of the Field to compare (bool, enum, int or float)</param>
	/// <param name="comparationValue">Value to compare</param>
	public ShowWhenAttribute(string conditionFieldName, object comparationValue = null) {
		this.conditionFieldName = conditionFieldName;
		this.comparationValue = comparationValue;
	}

	/// <summary>
	/// Attribute used to show or hide the Field depending on certain conditions
	/// </summary>
	/// <param name="conditionFieldName">Name of the Field to compare (bool, enum, int or float)</param>
	/// <param name="comparationValueArray">Array of values to compare (only for enums)</param>
	public ShowWhenAttribute(string conditionFieldName, object[] comparationValueArray = null) {
		this.conditionFieldName = conditionFieldName;
		this.comparationValueArray = comparationValueArray;
	}
}