Usage of Wt::WAbstractItemModel::match(...)
Added by Fabian V over 4 years ago
Hi, I'm trying to search an item in a model. For example, I've created a model with some numbers in the first column and now I'd like to find the right row/item where number "9" is set.
My problem is, I don't know how to use the Wt::WModelIndex-argument.
Wt::WModelIndex idx;
auto hits = sut->getModel()->match(idx, Wt::ItemDataRole::Display, "9", -1, Wt::MatchFlag::Wrap);
So I would expect that:
REQUIRE(hits.size() == 1);
...but it's zero.
I guess I'm using Wt::WModelIndex wrong so it would be great if someone can tell me how to initialize it.
Thanks!
Replies (3)
RE: Usage of Wt::WAbstractItemModel::match(...) - Added by Roel Standaert over 4 years ago
With that line:
Wt::WModelIndex idx;
you're just creating an invalid index.
You can get a valid model index to the first cell in column n with:
Wt::WModelIndex idx = sut->getModel->index(0, n);
RE: Usage of Wt::WAbstractItemModel::match(...) - Added by Fabian V over 4 years ago
Ok thank you - that's better. Unfortunately the result is still not what I expect.
When I set the flags this way:
auto hits = sut->getModel()->match(sut->getModel()->index(0, 0), Wt::ItemDataRole::Display, std::any("9"), -1, Wt::MatchFlag::StartsWith | Wt::MatchFlag::Wrap);
...the number of results is the same as the row-count in the model. Although the other entries are completely different.
When I set the flags this way:
auto hits = sut->getModel()->match(sut->getModel()->index(0, 0), Wt::ItemDataRole::Display, std::any("9"), -1, Wt::MatchFlag::StringExactly);
...the number of results is zero.
So it looks like I'm still doing something wrong.
The goal is to get the item or row-number where "9" is written in.
RE: Usage of Wt::WAbstractItemModel::match(...) - Added by Fabian V over 4 years ago
[SOLVED]
Ok, looks like this works for me:
auto hits = sut->getModel()->match(sut->getModel()->index(0, 0), Wt::ItemDataRole::Display, 9);
And I can change an item in the same row by:
sut->getModel()->item(hits[0].row(), 2)->setText("22");