Start implememntation of database based Fox log model and a new Fox log window widget

This change incorporates a reorganization of the GUI code with widgets, validators, models, and item delegates being moved to sub-directories. Relax the requirements of the ForeignKeyDelegate and related CandidateKeyFilter classes to allow them to work with constant model pointers for both referenced and referencing models.
2026-06-01 21:45:00 -04:00 · 2018-11-07 17:49:45 +00:00
parent 48017c5827
commit 947b429723
106 changed files with 1231 additions and 722 deletions
@@ -0,0 +1,89 @@
+#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 const * 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 (const_cast<QAbstractItemModel *> (referenced_model));
+}
+
+CandidateKeyFilter::CandidateKeyFilter (QAbstractItemModel const * 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 (const_cast<QAbstractItemModel *> (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 ();
+}