public override void OnInspectorGUI()
{
base.OnInspectorGUI();
ItemComponent targ = target as ItemComponent;
EItemState newValue = (EItemState)EditorGUILayout.EnumPopup(targ.state);
if (newValue != targ.state)
{
targ.state = newValue;
targ.SetObjectProperties();
// do stuff, call functions, etc.
}
}