Detecting sort completed on QTableWidget

james b-s

I need to do something after a user sorts a QTableWidget. I need to be able to detect when the table has been resorted. I tried detecting a click on the header, but that occurs before the sort. I need to do something after the sort is completed.

Someone suggested overriding QTableWidget::sortItems, but since that is not virtual, my method doesn't override anything and doesn't get called.

Another suggestion that I found was to replace the QSortFilterProxyModel that is used by the QTableWidget, but the methods to do so are private.

I presumably could stop using QTableWidget and use QTableView instead, but that seems like a lot of work to get something that should be fairly simple. There must be a better way.

I also tried catching the rowsMoved signal of the default model for QTableWidget (another suggestion I found). I was unable to catch the signal. Not sure why.

Here is the code that I used to try to catch the signal.

QAbstractItemModel * qModel = m_qUI.calendarTableWidget->model();
  connect(qModel,   SIGNAL(rowsMoved(const QModelIndex &, int, int, const QModelIndex, int)), this, SLOT(onCalendarRowsMoved(const QModelIndex &, int, int, const QModelIndex &, int)));

To reiterate, I need to call a particular method of mine whenever a sort completes after someone clicks on the header of a QTableWidget.

SGaist

Hi,

Can you explain what you need to do after the sorting applied ?

VRonin

@james-b-s said in Detecting sort completed on QTableWidget:

I need to call a particular method of mine whenever a sort completes

connect(tableWidget->model(),&QAbstractItemModel::layoutChanged,this,&MyClass::onCalendarRowsMoved);

You will need to change the signature of the slot though

james b-s

My code had a typo in it. It really looks like this

 QAbstractItemModel * qModel = m_qUI.calendarTableWidget->model();
  connect(qModel,   SIGNAL(rowsMoved(const QModelIndex &, int, int, const QModelIndex &, int)), this, SLOT(onCalendarRowsMoved(const QModelIndex &, int, int, const QModelIndex &, int)));

Still didn't work

mrjj

@james-b-s

Works fine as @VRonin says

for test i used

connect(ui->tableWidget->model(), &QAbstractItemModel::layoutChanged,
    this, [](const QList<QPersistentModelIndex> &parents, QAbstractItemModel::LayoutChangeHint hint) {
    qDebug() << "sorted";
    });

and it seems to work.

Note he uses other signal than your code.

james b-s

I am making related cells span together and I need to recalculate that when someone changes the sorting.

james b-s

Thanks that worked