Interact with editor widgets' data in QTableView

Question

I'm using an editable QTableView + QStandardItemModel.

While editing a cell in a table view, I'd like to do something according to the new input data in this specific cell when committing the new data into the table view.

To do this, I need the new input data and the current model index (or column & row number). I tried some slots such as

virtual void closeEditor (QWidget * editor, QAbstractItemDelegate::EndEditHint hint)

and

virtual void commitData ( QWidget * editor ).

commitData seems to be what I need, however, the parameter is only the editor and I cannot figure out how to obtain the text in this editor widget. I looked QTextEdit but it's not a inherited class of QWidget.

I wonder if there's any way to obtain the data (text) and axis (column, row) of an editor widget?

Answer 1

I suggest to implement your own item delegate, inheriting QStandardItemDelegate (or QAbstractItemDelegate). There you can override

void setModelData ( QWidget * editor, QAbstractItemModel * model, const QModelIndex & index ) const

Simply do you your custom processing and then call QStandardItemDelegate::setModelData(...) to make sure that your model is updated with the newly edited data.

Answer 2

The itemChanged(QStandardItem*) signal is emitted by a QStandardItemModel whenever an item's data changes.

From the given QStandardItem, you can retrieve the row and column directly. To get the displayed text, pass Qt::DisplayRole to the item's data() method.