QSqlRelationalDelegate Class

The QSqlRelationalDelegate class provides a delegate that is used to display and edit data from a QSqlRelationalTableModel. More...

Header: #include <QSqlRelationalDelegate>
qmake: QT += sql

Public Functions

QSqlRelationalDelegate(QObject * parent = 0)
~QSqlRelationalDelegate()
QWidget * createEditor(QWidget * parent, const QStyleOptionViewItem & option, const QModelIndex & index) const
void setModelData(QWidget * editor, QAbstractItemModel * model, const QModelIndex & index) const

Detailed Description

The QSqlRelationalDelegate class provides a delegate that is used to display and edit data from a QSqlRelationalTableModel.

Unlike the default delegate, QSqlRelationalDelegate provides a combobox for fields that are foreign keys into other tables. To use the class, simply call QAbstractItemView::setItemDelegate() on the view with an instance of QSqlRelationalDelegate:

    QTableView *view = new QTableView;
    view->setModel(model);
    view->setItemDelegate(new QSqlRelationalDelegate(view));

The Relational Table Model example (shown below) illustrates how to use QSqlRelationalDelegate in conjunction with QSqlRelationalTableModel to provide tables with foreign key support.

See also QSqlRelationalTableModel and Model/View Programming.

Member Function Documentation

QSqlRelationalDelegate::QSqlRelationalDelegate(QObject * parent = 0)

Constructs a QSqlRelationalDelegate object with the given parent.

QSqlRelationalDelegate::~QSqlRelationalDelegate()

Destroys the QSqlRelationalDelegate object and frees any allocated resources.

QWidget * QSqlRelationalDelegate::createEditor(QWidget * parent, const QStyleOptionViewItem & option, const QModelIndex & index) const

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