Method OnInvalidateData

src/group_gui.cpp:531–554

* Some data on this window has become invalid. * @param data Information about the changed data. * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details. */

	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
	 */
	void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
	{
		if (data == 0) {
			/* This needs to be done in command-scope to enforce rebuilding before resorting invalid data */
			this->vehgroups.ForceRebuild();
			this->groups.ForceRebuild();
		} else {
			this->vehgroups.ForceResort();
			this->groups.ForceResort();
		}

		/* Process ID-invalidation in command-scope as well */
		if (this->group_rename != GroupID::Invalid() && !Group::IsValidID(this->group_rename)) {
			CloseWindowByClass(WC_QUERY_STRING);
			this->group_rename = GroupID::Invalid();
		}

		GroupID group = this->vli.ToGroupID();
		if (!(IsAllGroupID(group) || IsDefaultGroupID(group) || Group::IsValidID(group))) {
			this->vli.SetIndex(ALL_GROUP);
			this->CloseChildWindows(WC_DROPDOWN_MENU);
		}
		this->SetDirty();
	}

	std::string GetWidgetString(WidgetID widget, StringID stringid) const override
	{