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#include "CandidateKeyFilter.hpp"
#include <QModelIndex>
#include <QAbstractItemModel>
#include "pimpl_impl.hpp"
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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