Russian Qt Forum

void IPinput::setModelData(QWidget *editor, QAbstractItemModel *model,
                  const QModelIndex &index) const
{
    QLineEdit *edit = static_cast <QLineEdit*> (editor);
    QString strEdit = edit->text();
    if (!correctIP(strEdit)){
       model->setData(index,Qt::red,Qt::TextColorRole);//пока просто крашу некорректные данные
    }
    model->setData(index,strEdit,Qt::EditRole);
}

...

bool IPinput::eventFilter(QObject *obj, QEvent *event)
{
    QLineEdit *edit = static_cast<QLineEdit *> (obj);
    if (event->type() == QEvent::KeyPress) {
          QKeyEvent *keyPress = static_cast<QKeyEvent *>(event);
          if(keyPress->key() == Qt::Key_Escape){
               edit->setText(oldInputIP);
               return true;
            }else return QItemDelegate::eventFilter(obj, event);
    
    if (event->type()== QEvent::FocusOut){
 //тут можно вставить проверку, но ,      
 //что при true, что при false вызывается диструктор  
        return false;
    }
    }else{
     return QItemDelegate::eventFilter(obj, event);
  }
}

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

class closeDelegate: public QAbstractItemDelegate{

     void closeEditor ( QWidget * editor, QAbstractItemDelegate::EndEditHint hint);
};
....

closeDelegate *Item =  new closeDelegate();

class IPinput : public QItemDelegate//редактирование IP таблиц
{
    Q_OBJECT
public:
    IPinput(QObject *parent = 0);
    QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const;
    void setEditorData(QWidget *editor, const QModelIndex &index) const;
    void setModelData(QWidget *editor, QAbstractItemModel *model,
                      const QModelIndex &index) const;
   // void closeEditor(QWidget *editor, EndEditHint hint);
public slots:
    bool eventFilter(QObject *obj, QEvent *event);
    // bool eventFilter(QObject *obj, QEvent *event);
protected :
   virtual void closeEditor(QWidget *editor, QAbstractItemDelegate::EndEditHint hint);//сюда не попадаем
};
...

void IPinput::closeEditor(QWidget *editor, QAbstractItemDelegate::EndEditHint hint){
   
    return;
}
....

   ui->tableSpisok->setItemDelegateForColumn(2,new IPinput());
}

virtual void destroyEditor(QWidget * editor, const QModelIndex & index) const

class closeDelegate: public QAbstractItemView{

 protected:
   void closeEditor(QWidget *editor, QAbstractItemDelegate::EndEditHint hint);
};

...

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

    return;

}

class IPinput : public QItemDelegate//редактирование IP таблиц
{
    Q_OBJECT
public:
    IPinput(QObject *parent = 0);
    QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const;
    void setEditorData(QWidget *editor, const QModelIndex &index) const;
    void setModelData(QWidget *editor, QAbstractItemModel *model,
                      const QModelIndex &index) const;
   // void closeEditor(QWidget *editor, EndEditHint hint);
public slots:
    bool eventFilter(QObject *obj, QEvent *event);
    // bool eventFilter(QObject *obj, QEvent *event);
protected :
  // virtual void closeEditor(QWidget *editor, QAbstractItemDelegate::EndEditHint hint);
};

....

ui->tableSpisok->setItemDelegateForColumn(2,new IPinput());
ui->tableSpisok->setItemDelegateForColumn(1,new IPinput());