Add item auto-highlighting to `MenuBar`

scene/gui/menu_bar.cpp

@@ -60,7 +60,7 @@ void MenuBar::gui_input(const Ref<InputEvent> &p_event) {
 			if (active_menu >= 0) {
 				get_menu_popup(active_menu)->hide();
 			}
-			_open_popup(selected_menu);
+			_open_popup(selected_menu, true);
 		}
 		return;
 	} else if (p_event->is_action("ui_right") && p_event->is_pressed()) {
@@ -82,7 +82,7 @@ void MenuBar::gui_input(const Ref<InputEvent> &p_event) {
 			if (active_menu >= 0) {
 				get_menu_popup(active_menu)->hide();
 			}
-			_open_popup(selected_menu);
+			_open_popup(selected_menu, true);
 		}
 		return;
 	}
@@ -110,7 +110,7 @@ void MenuBar::gui_input(const Ref<InputEvent> &p_event) {
 	}
 }
 
-void MenuBar::_open_popup(int p_index) {
+void MenuBar::_open_popup(int p_index, bool p_focus_item) {
 	ERR_FAIL_INDEX(p_index, menu_cache.size());
 
 	PopupMenu *pm = get_menu_popup(p_index);
@@ -134,6 +134,15 @@ void MenuBar::_open_popup(int p_index) {
 	pm->set_parent_rect(Rect2(Point2(screen_pos - pm->get_position()), Size2(screen_size.x, screen_pos.y)));
 	pm->popup();
 
+	if (p_focus_item) {
+		for (int i = 0; i < pm->get_item_count(); i++) {
+			if (!pm->is_item_disabled(i)) {
+				pm->set_current_index(i);
+				break;
+			}
+		}
+	}
+
 	update();
 }
 

scene/gui/menu_bar.h

@@ -84,7 +84,7 @@ class MenuBar : public Control {
 	Vector<PopupMenu *> _get_popups() const;
 	int get_menu_idx_from_control(PopupMenu *p_child) const;
 
-	void _open_popup(int p_index);
+	void _open_popup(int p_index, bool p_focus_item = false);
 	void _popup_visibility_changed(bool p_visible);
 	void _update_submenu(const String &p_menu_name, PopupMenu *p_child);
 	void _clear_menu();