Maximum Characters in Qtablewidgetitem

[Nexus6]

Hi,

I want to fix the maximum characters that a user can input in a qtablewidgetitem.

I was thinking of validators, but I'm not sure how to do it.

Any hints?

Thanks

[shentian]

QTableWidget uses a QLineEdit to edit the contents of an item. The QLineEdit is provided by the QItemDelegate installed for every column. You can use QLineEdit::setMaxLength to fix the maximum number of characters.

Do the following:

1. Create a subclass of QItemDelegate.
2. Override QItemDelegate::createEditor (see code below).
3. Install your ItemDelegate in the QTableWidget using setItemDelegate , setItemDelegateForColumn, or setItemDelegateForRow as appropriate.

virtual QWidget* MyItemDelegate::createEditor(QWidget* parent, const QStyleOptionViewItem& option, const QModelIndex& index ) const
{
  QLineEdit* lineEdit = new QLineEdit(parent);
  lineEdit->setMaxLength(80); // or whatever...
  return lineEdit;
}

virtual QWidget* MyItemDelegate::createEditor(QWidget* parent, const QStyleOptionViewItem& option, const QModelIndex& index ) const
{
  QLineEdit* lineEdit = new QLineEdit(parent);
  lineEdit->setMaxLength(80); // or whatever...
  return lineEdit;
}

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