Fixed some stuff

src/bedit_gui/views/models/document_tree_model.py

@@ -131,6 +131,12 @@ class DocumentTreeModel(QAbstractItemModel):
         node = index.internalPointer()
         return node.value if isinstance(node, DocumentTreeNode) else None
 
+    def component_index(self, component_id: ComponentID) -> QModelIndex:
+        node = self._component_nodes.get(component_id)
+        if node is None or node.parent is None:
+            return QModelIndex()
+        return self.createIndex(node.parent.children.index(node), 0, node)
+
     def flags(self, index: QModelIndex) -> Qt.ItemFlag:
         flags = super().flags(index)