QTableWidget - get cell index from cell widget ?

Dariusz

Hey

I have a QLineEdit in my cell that when conencted to return pressed emits self to my function.

In my function I try doing indexAt(mapToGlobal(mySender->pos())); and then somehow get the index location of where my widget is at. But that does not work... I tried converting from global coordinate to local and even mapTo(xx) but no luck. How can I properly map the coordinate ? Or maybe there is a better way of doing it ?

Regards
Dariusz

mrjj

Hi
If you know what cell index is when you call
setWidget to apply the QLineEdit, you could store it
in a property
thelineedit->setProperty("index", xxx)
and then read it in your function.

Dariusz

Except that when I drag drop etc I will lose that data. I have also partly custom drag drop system as well.... So if I could get it from indexAt that would help a lot...

Christian Ehrlicher

indexAt() is working correct - when you pass the correct (viewport) coordinates to it...

mrjj

Hi
Did a fast test.
alt text
QLineEdits at

    ui->tableWidget->setCellWidget(1, 1, AddEdit());
    ui->tableWidget->setCellWidget(2, 2, AddEdit());
    ui->tableWidget->setCellWidget(3, 4, AddEdit());

Then in slot

void MainWindow::OnEnter()
{
    QLineEdit *line = qobject_cast<QLineEdit *> ( sender() );
    if (!line) return;
    qDebug() << line->pos();
    qDebug() <<  ui->tableWidget->indexAt( line->pos() );
}

and output is

QPoint(100,30)
QModelIndex(1,1,0x0,QTableModel(0x1f1d13ea7d0))
QPoint(200,60)
QModelIndex(2,2,0x0,QTableModel(0x1f1d13ea7d0))
QPoint(400,90)
QModelIndex(3,4,0x0,QTableModel(0x1f1d13ea7d0))

Which seems pretty ok to me ?

Dariusz

Hmmmmmmmmm that got me to think a bit more....

Since my lineEdit was inside a QWidget layouts as child... I tried qDebug() << indexAt(dynamic_cast<QWidget *>(sender->parent())->pos()); and wuaila it worked!

Hmmmmmm strange that I could not get it directly from QLineEdit but I had to go to top parent widget... ?

Still works, thanks so much for help!

mrjj

@Dariusz
Just a note
qobject_cast is preferable to dynamic_cast.

If the QLineEdit is inside a widget, it means its pos() will be the offset from
the QWidget (parent) which would be like just a few pixels. ( like 9,9 )
However, taking Pos() on the parent widget get you the position relative to the TableWidget which is needed for indexAt()