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