static void MenuPerform_TriangulateObject()
        {
            var instance = EditorToolbarLoader.GetInstance <TriangulateObject>();

            if (instance != null && instance.enabled)
            {
                EditorUtility.ShowNotification(instance.PerformAction().notification);
                ProBuilderAnalytics.SendActionEvent(instance, ProBuilderAnalytics.TriggerType.MenuOrShortcut);
            }
        }
        /// <summary>
        /// Draw a menu button.  Returns true if the button is active and settings are enabled, false if settings are not enabled.
        /// </summary>
        /// <param name="isHorizontal"></param>
        /// <param name="showOptions"></param>
        /// <param name="optionsRect"></param>
        /// <param name="layoutOptions"></param>
        /// <returns></returns>
        internal virtual bool DoButton(bool isHorizontal, bool showOptions, ref Rect optionsRect, params GUILayoutOption[] layoutOptions)
        {
            bool wasEnabled    = GUI.enabled;
            bool buttonEnabled = (menuActionState & MenuActionState.Enabled) == MenuActionState.Enabled;

            GUI.enabled = buttonEnabled;

            GUI.backgroundColor = Color.white;

            if (iconMode)
            {
                if (GUILayout.Button(buttonEnabled || !disabledIcon ? icon : disabledIcon, ToolbarGroupUtility.GetStyle(group, isHorizontal), layoutOptions))
                {
                    if (showOptions && (optionsMenuState & MenuActionState.VisibleAndEnabled) == MenuActionState.VisibleAndEnabled)
                    {
                        DoAlternateAction();
                    }
                    else
                    {
                        ActionResult result = PerformAction();
                        EditorUtility.ShowNotification(result.notification);
                        ProBuilderAnalytics.SendActionEvent(this, ProBuilderAnalytics.TriggerType.ProBuilderUI);
                    }
                }

                if ((optionsMenuState & MenuActionState.VisibleAndEnabled) == MenuActionState.VisibleAndEnabled)
                {
                    Rect r = GUILayoutUtility.GetLastRect();
                    r.x      = r.x + r.width - 16;
                    r.y     += 0;
                    r.width  = 14;
                    r.height = 14;
                    GUI.Label(r, IconUtility.GetIcon("Toolbar/Options", IconSkin.Pro), GUIStyle.none);
                    optionsRect = r;
                    GUI.enabled = wasEnabled;
                    return(buttonEnabled);
                }
                else
                {
                    GUI.enabled = wasEnabled;
                    return(false);
                }
            }
            else
            {
                // in text mode always use the vertical layout.
                isHorizontal = false;
                GUILayout.BeginHorizontal(MenuActionStyles.rowStyleVertical, layoutOptions);

                GUI.backgroundColor = ToolbarGroupUtility.GetColor(group);

                if (GUILayout.Button(menuTitle, MenuActionStyles.buttonStyleVertical))
                {
                    ActionResult res = PerformAction();
                    EditorUtility.ShowNotification(res.notification);
                    ProBuilderAnalytics.SendActionEvent(this, ProBuilderAnalytics.TriggerType.ProBuilderUI);
                }
                MenuActionState altState = optionsMenuState;

                if ((altState & MenuActionState.Visible) == MenuActionState.Visible)
                {
                    GUI.enabled = GUI.enabled && (altState & MenuActionState.Enabled) == MenuActionState.Enabled;

                    if (DoAltButton(GUILayout.MaxWidth(21), GUILayout.MaxHeight(16)))
                    {
                        DoAlternateAction();
                    }
                }
                GUILayout.EndHorizontal();

                GUI.backgroundColor = Color.white;

                GUI.enabled = wasEnabled;

                return(false);
            }
        }