Qt set a custom widget inside a QTableView

Question

I need to put a custom widget inside a QTableView cell from a subclassed QAbstractTableModel.

I searched for already given solutions but no one catch my needs. The custom widget must stay here all the time and not only in editing mode like with the QItemDelegate::createEditor. The custom widget may be everything, i'm searching for a general solutions for all the widget not only QPushButtons or QCheckBox.

Sorry for my english.

Answer 1

You can use QAbstractItemView::setIndexWidget and overriding QAbstractItemView::dataChanged to achieve what you want as follows:

class MyTableView : public QTableView
{
protected:
  void dataChanged(const QModelIndex &topLeft, const QModelIndex & bottomRight, const QVector<int> & roles)
  {
    QPushButton *pPushButton = qobject_cast<QPushButton*>(indexWidget(topLeft));
    if (pPushButton)
        pPushButton->setText(model()->data(topLeft, Qt::DisplayRole).toString());
    else
        QTableView::dataChanged(topLeft, bottomRight, roles);
  }
};

void main ()
{
    MyTableView table;
    table.setIndexWidget(table.model()->index(0, 0, QModelIndex()),new QPushButton());
}

Note that it is an incomplete implementation, but it should show you how you can solve your problem. A real implementation should update all QPushButton between topLeft and bottomRight.