gistfile1.cs

public class EditorFieldBase {
    protected static uint uid_ = 0;
    protected string name_;
    protected string name { get { return name_; } }
    protected EditorFieldBase() {
        name_ = (uid_++).ToString();
    }
}
public class EditorIntField : EditorFieldBase {
    private GUIStyle style_;
    private int value_;
    private bool changed_;
    public bool changed { get { return changed_; } }
    public EditorIntField(int iniv) : base() {
        changed_ = false;
        value_ = iniv;
    }
    public int OnGUI(string label, int v) {
        if (style_ == null) {
            style_ = new GUIStyle(EditorStyles.numberField);
        }

        changed_ = false;
        GUILayout.BeginHorizontal();
        GUILayout.Label(label);
        GUI.SetNextControlName(this.name);
        value_ = EditorGUILayout.IntField(value_, style_, GUILayout.Width(50));
        GUILayout.EndHorizontal();
        if (v != value_)
            style_.normal.textColor = Color.yellow;
        else
            style_.normal.textColor = Color.white;
        Event e = Event.current;
        if (e.type != EventType.KeyUp) return v;
        e.Use();
        if (v != value_ &&
            e.keyCode == KeyCode.Return &&
            GUI.GetNameOfFocusedControl() != this.name) {
            changed_ = true;
            return value_;
        } else {
            return v;
        }
    }
}