void OnGUI()

in Editor/Scripts/NewEnumWindow.cs [65:99]
33 lines of code
7 McCabe index (conditional complexity)

        void OnGUI()
        {
            EditorGUI.BeginChangeCheck();
            m_Info.name = EditorGUILayout.TextField("Enum name", m_Info.name);
            if (m_EnumList == null) RebuildList();
            m_EnumList.DoLayoutList();
            if (EditorGUI.EndChangeCheck())
            {
                MakeChecks();
            }

            GUILayout.Space(5);
            if (!string.IsNullOrEmpty(m_ErrorMessage))
            {
                GUILayout.Space(5);
                EditorGUILayout.HelpBox(m_ErrorMessage, MessageType.Error);
            }
            else if (m_EnumExist)
            {
                EditorGUILayout.HelpBox("An enum with this name already exists", MessageType.Warning);
            }

            GUILayout.Space(5);
            using (new EditorGUI.DisabledScope(!string.IsNullOrEmpty(m_ErrorMessage)))
            using (new GUILayout.HorizontalScope())
            {
                GUILayout.FlexibleSpace();
                if (GUILayout.Button(
                    m_EnumExist ? "Update Enum" : "Add New Enum", Styles.button, GUILayout.ExpandWidth(false)))
                {
                    m_ProtoFile.AddEnum(m_Info);
                    this.Close();
                }
            }
        }