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#ifndef FOREIGN_KEY_DELEGATE_HPP_
#define FOREIGN_KEY_DELEGATE_HPP_
#include <QScopedPointer>
#include <QStyledItemDelegate>
class CandidateKeyFilter;
//
// Class ForeignKeyDelegate
//
// Item delegate for editing a foreign key item in a one or many
// to one relationship. A QComboBox is used as an item delegate
// for the edit role.
//
class ForeignKeyDelegate final : public QStyledItemDelegate {
public:
// many to many relationship
explicit ForeignKeyDelegate(QAbstractItemModel *referenced_model,
int referenced_key_column,
QObject *parent = nullptr,
int referenced_key_role = Qt::EditRole);
// one to many (referenced to referencing) relationship
explicit ForeignKeyDelegate(QAbstractItemModel *referenced_model,
QAbstractItemModel const *referencing_model,
int referenced_key_column,
int referencing_key_column,
QObject *parent = nullptr,
int referenced_key_role = Qt::EditRole,
int referencing_key_role = Qt::EditRole);
~ForeignKeyDelegate();
QWidget *createEditor(QWidget *parent, QStyleOptionViewItem const &,
QModelIndex const &) const override;
private:
QScopedPointer<CandidateKeyFilter> candidate_key_filter_;
};
#endif
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