Unity SerializableDecimalDrawer

using UnityEngine;
using UnityEditor;

[CustomPropertyDrawer (typeof (SerializableDecimal))]
public class SerializableDecimalDrawer : PropertyDrawer {
    public override void OnGUI (Rect position, SerializedProperty property, GUIContent label) {
        var obj = property.serializedObject.targetObject;
        var inst = (SerializableDecimal) this.fieldInfo.GetValue (obj);
        var fieldRect = EditorGUI.PrefixLabel (position, label);
        string text = GUI.TextField (fieldRect, inst.value.ToString ());
        if (GUI.changed) {
            decimal val;
            if (decimal.TryParse (text, out val)) {
                inst.value = val;
                property.serializedObject.ApplyModifiedProperties ();
            }
        }
    }
}