QSqlRelationalDelegate 類

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

頭：	#include <QSqlRelationalDelegate>
qmake:	QT += sql
繼承：	QItemDelegate

公共函數

	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 關係錶模型 example (shown below) illustrates how to use QSqlRelationalDelegate in conjunction with QSqlRelationalTableModel to provide tables with foreign key support.

另請參閱 QSqlRelationalTableModel and 模型/視圖編程 .

構造 QSqlRelationalDelegate 對象采用給定 parent .

銷毀 QSqlRelationalDelegate 對象並釋放任何分配資源。