Qt Documentation

Qt 5.10
Qt SQL
C++ Classes
QSqlRelationalDelegate

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
Inherits:	QItemDelegate

List of all members, including inherited members

Public Functions

	QSqlRelationalDelegate(QObject *parent = nullptr)
	~QSqlRelationalDelegate()

Reimplemented Public Functions

virtual QWidget *	createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const override
virtual void	setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const override

10 public functions inherited from QItemDelegate
9 public functions inherited from QAbstractItemDelegate
32 public functions inherited from QObject

Additional Inherited Members

1 property inherited from QItemDelegate
1 property inherited from QObject
1 public slot inherited from QObject
3 signals inherited from QAbstractItemDelegate
2 signals inherited from QObject
11 static public members inherited from QObject
7 protected functions inherited from QItemDelegate
9 protected functions inherited from QObject

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.

Member Function Documentation

QSqlRelationalDelegate::QSqlRelationalDelegate(QObject **parent* = nullptr)

Constructs a QSqlRelationalDelegate object with the given parent.

QSqlRelationalDelegate::~QSqlRelationalDelegate()

Destroys the QSqlRelationalDelegate object and frees any allocated resources.

`[override virtual]` QWidget *QSqlRelationalDelegate::createEditor(QWidget **parent, const QStyleOptionViewItem &option, const QModelIndex &index*) const

Reimplemented from QAbstractItemDelegate::createEditor().

`[override virtual]` void QSqlRelationalDelegate::setModelData(QWidget **editor*, QAbstractItemModel **model, const QModelIndex &index*) const

Reimplemented from QAbstractItemDelegate::setModelData().

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