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gui: do not crash when deleting selected hierarchical dataset and its parents

This commit is contained in:
Sebastien Bourdeauducq 2016-02-13 23:22:59 +01:00
parent 6b6393ff56
commit e68d0d1ec7
1 changed files with 11 additions and 1 deletions
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12
artiq/gui/models.py
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@ -193,6 +193,15 @@ class _DictSyncTreeSepItem:
self.children_by_row = [] self.children_by_row = []
self.children_nodes_by_name = dict() self.children_nodes_by_name = dict()
self.children_leaves_by_name = dict() self.children_leaves_by_name = dict()
# is_node is permanently set when a child is added.
# This must be done instead of checking for the emptiness of
# children_by_row: in the middle of deletion operations, we remove
# items from children_by_row, and briefly turn nodes into leaves
# before they are removed.
# Of course, Qt sometimes happily calls data() on those invalid leaves,
# resulting in convert() being called for an invalid key if we hadn't
# permanently marked those items as nodes.
self.is_node = False
def __repr__(self): def __repr__(self):
return ("<DictSyncTreeSepItem {}, row={}, nchildren={}>" return ("<DictSyncTreeSepItem {}, row={}, nchildren={}>"
@ -275,6 +284,7 @@ class DictSyncTreeSepModel(QtCore.QAbstractItemModel):
item = _DictSyncTreeSepItem(parent, row, name) item = _DictSyncTreeSepItem(parent, row, name)
self.beginInsertRows(self._index_item(parent), row, row) self.beginInsertRows(self._index_item(parent), row, row)
parent.is_node = True
parent.children_by_row.insert(row, item) parent.children_by_row.insert(row, item)
for next_item in parent.children_by_row[row+1:]: for next_item in parent.children_by_row[row+1:]:
next_item.row += 1 next_item.row += 1
@ -338,7 +348,7 @@ class DictSyncTreeSepModel(QtCore.QAbstractItemModel):
def index_to_key(self, index): def index_to_key(self, index):
item = index.internalPointer() item = index.internalPointer()
if item.children_by_row: if item.is_node:
return None return None
key = item.name key = item.name
item = item.parent item = item.parent