From def2a99ed8bcbaafa12b406462370950b8928a97 Mon Sep 17 00:00:00 2001
From: Dominik Demuth <dominik.demuth@pkm.tu-darmstadt.de>
Date: Thu, 27 Apr 2023 12:13:20 +0200
Subject: [PATCH] datawidget.py: raise AttributeError manually if item is
 graph, was not always raised; maybe problem of #52

---
 src/gui_qt/data/datawidget/datawidget.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/gui_qt/data/datawidget/datawidget.py b/src/gui_qt/data/datawidget/datawidget.py
index 515506e..1051bb8 100644
--- a/src/gui_qt/data/datawidget/datawidget.py
+++ b/src/gui_qt/data/datawidget/datawidget.py
@@ -350,6 +350,9 @@ class DataTree(QtWidgets.QTreeWidget):
             _id = item.data(0, QtCore.Qt.UserRole)
             if _id in ids:
                 try:
+                    if item.parent() is None:
+                        raise AttributeError
+
                     idx = item.parent().indexOfChild(item)
                     item.parent().takeChild(idx)
                     if _id in self._checked_sets: