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#ifndef FOREIGN_KEY_DELEGATE_HPP_
#define FOREIGN_KEY_DELEGATE_HPP_
#include <QStyledItemDelegate>
#include <QScopedPointer>
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 const * 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 const * 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 ();
private:
QWidget * createEditor (QWidget * parent, QStyleOptionViewItem const&, QModelIndex const&) const override;
QSize sizeHint (QStyleOptionViewItem const&, QModelIndex const&) const override;
QScopedPointer<CandidateKeyFilter> candidate_key_filter_;
};
#endif
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