QSqlRelationalDelegate Class

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

头文件:	#include <QSqlRelationalDelegate>
qmake:	QT += sql
基类:	QItemDelegate

公有函数

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

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

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.

Constructs a QSqlRelationalDelegate object with the given parent.

Destroys the QSqlRelationalDelegate object and frees any allocated resources.