Russian Qt Forum

#include <QWidget>
#include <QStyledItemDelegate>
#include <QComboBox>
#include <QModelIndex>
#include <QObject>
#include <QtSql>
#include <QItemDelegate>

class ComboBoxDelegate : public QItemDelegate
{
    Q_OBJECT
public:
    ComboBoxDelegate(QObject *parent);

    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 updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &index) const;

};

#include "comboboxdelegate.h"
#include <QComboBox>
#include <QSqlQuery>
#include <QDebug>

ComboBoxDelegate::ComboBoxDelegate(QObject *parent)
    :QItemDelegate(parent)
{

}

QWidget *ComboBoxDelegate ::createEditor(QWidget *parent, const QStyleOptionViewItem &/* option */, const QModelIndex &/* index */) const
{

  QComboBox* editor = new QComboBox(parent);
  QSqlQuery q;
  QStringList list;
  q.exec("select typname from pg_type");
//  while(q.next()){
//      QString name = q.value(1).toString();
//      list<<name;
//}
//  editor->addItems(list);

  QSqlRecord rec = q.record();
      while (q.next()) {
          editor->addItem(q.value(0).toString(), q.value(0));
      }

  return editor;
}

void ComboBoxDelegate::setEditorData(QWidget *editor, const QModelIndex &index) const
{
  QComboBox *comboBox = static_cast<QComboBox*>(editor);
  QString value = index.model()->data(index, Qt::EditRole).toString();
  comboBox->setCurrentIndex(comboBox->findText(value));
  qDebug() << value;
}

void ComboBoxDelegate::setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const
{
  QComboBox *comboBox = static_cast<QComboBox*>(editor);
  model->setData(index, comboBox->currentIndex(), Qt::EditRole);
}

void ComboBoxDelegate::updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &/* index */) const
{
  editor->setGeometry(option.rect);
}

void Dialog::on_pushButton_clicked()
{
    int lastRow = model->rowCount();
    model->insertRow(lastRow);
    model->setData(model->index(lastRow,1),"");
    tableNameColumn->selectRow(lastRow);
    tableNameColumn->setFocus();
    ComboBoxDelegate* delegate = new ComboBoxDelegate(this);
    tableNameColumn->setItemDelegateForColumn(1, delegate);
    for ( int i = 0; i < model->insertRow(lastRow); ++i )
         {
         tableNameColumn->openPersistentEditor(model->index(i, 1) );
         }
    model->submit();
}

void ComboBoxDelegate::setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const
{
  QComboBox *comboBox = static_cast<QComboBox*>(editor);
  model->setData(index, comboBox->currentIndex(), Qt::EditRole);
}