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#include "CandidateKeyFilter.h"
#include <QAbstractItemModel>
#include <QModelIndex>
#include "JS8_Include/pimpl_impl.h"
class CandidateKeyFilter::impl final {
public:
explicit impl(int referenced_key_column, int referenced_key_role,
QAbstractItemModel const *referencing_model,
int referencing_key_column, int referencing_key_role)
: referencing_{referencing_model},
referencing_key_column_{referencing_key_column},
referencing_key_role_{referencing_key_role},
referenced_key_column_{referenced_key_column},
referenced_key_role_{referenced_key_role} {}
QAbstractItemModel const *referencing_;
int referencing_key_column_;
int referencing_key_role_;
int referenced_key_column_;
int referenced_key_role_;
QModelIndex active_key_;
};
CandidateKeyFilter::CandidateKeyFilter(QAbstractItemModel *referenced_model,
int referenced_key_column,
QObject *parent, int referenced_key_role)
: QSortFilterProxyModel{parent},
m_{referenced_key_column, referenced_key_role, nullptr, 0, Qt::EditRole} {
setSourceModel(referenced_model);
}
CandidateKeyFilter::CandidateKeyFilter(
QAbstractItemModel *referenced_model,
QAbstractItemModel const *referencing_model, int referenced_key_column,
int referencing_key_column, QObject *parent, int referenced_key_role,
int referencing_key_role)
: QSortFilterProxyModel{parent},
m_{referenced_key_column, referenced_key_role, referencing_model,
referencing_key_column, referencing_key_role} {
setSourceModel(referenced_model);
}
CandidateKeyFilter::~CandidateKeyFilter() {}
void CandidateKeyFilter::set_active_key(QModelIndex const &index) {
if (m_->referencing_) {
if (index.isValid()) {
Q_ASSERT(index.column() == m_->referencing_key_column_);
m_->active_key_ = index;
}
invalidateFilter();
}
}
bool CandidateKeyFilter::filterAcceptsRow(
int candidate_row, QModelIndex const &candidate_parent) const {
if (!m_->referencing_) // many to many passes all
{
return true;
}
auto candidate_key =
sourceModel()
->index(candidate_row, m_->referenced_key_column_, candidate_parent)
.data(m_->referenced_key_role_);
// Include the current key.
if (m_->active_key_.isValid() &&
candidate_key == m_->active_key_.data(m_->referencing_key_role_)) {
return true;
}
// Filter out any candidates already in the referencing key rows.
return m_->referencing_
->match(m_->referencing_->index(0, m_->referencing_key_column_),
m_->referencing_key_role_, candidate_key, 1, Qt::MatchExactly)
.isEmpty();
}
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