QStandardItemModel::removeRows() does not work in my use case
-
24-06-2021 - |
Domanda
Basically I want to delete all rows in my model. I'd prefer to use removeRows(..)
instead of clear()
, because I want to keep my headers.
I guess I have missed something (docu here), my code is pretty simple:
int c = MainWindow::_viewDataModel->rowCount();
bool r = MainWindow::_viewDataModel->removeRows(0, c);
c
e.g. is 4, but r
is always false. I have tried 0 and 1 as first index. Using clear()
works. The above code has no impact at all.
Soluzione
It is working now. After some testing my findings:
RemoveRows
is very sensitive when there are less rows in the model as I do specify for deletion.- In my particular case it did happen that I wanted to delete 5 rows when only 4 rows were still in the model. So
_viewDataModel->removeRows(0, 4);
does not remove anything at all if there are just 3 rows in the model. - Unlike expected in such as case no deletion took place at all.
- My solution right now is to thoroughly get the model size before deleting.
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