Ensure all model proxy caches are flushed before access

This fixes a defect where station detail changes are not saved.

The Qt sort and filter proxy models utilize an item cache that must be
flushed by  callig submit() before  accessing the underlying  model if
the proxy model has been used for updates.

Also  separated  the   item  model  candidate  key   filter  from  the
implementation  internals of  the foreign  key item  delegate so  that
candidate key filtered models can be used directly as view models.

Make the insert new station details band combo box use a candidate key
filtered item model to avoid constraint violations. Constraint is zero
or one station records per band.

git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@5161 ab8295b8-cf94-4d9e-aec4-7959e3be5d79

CMakeLists.txt

@@ -184,6 +184,7 @@ set (wsjt_qt_CXXSRCS
   StationList.cpp
   FrequencyLineEdit.cpp
   FrequencyItemDelegate.cpp
+  CandidateKeyFilter.cpp
   ForeignKeyDelegate.cpp
   LiveFrequencyValidator.cpp
   GetUserId.cpp

CandidateKeyFilter.cpp

@@ -0,0 +1,70 @@
+#include "CandidateKeyFilter.hpp"
+
+#include <QModelIndex>
+#include <QAbstractItemModel>
+
+#include "pimpl_impl.hpp"
+
+class CandidateKeyFilter::impl final
+{
+public:
+  explicit impl (QAbstractItemModel const * referencing_model
+                 , int referencing_key_column
+                 , int referenced_key_column
+                 , int referencing_key_role
+                 , int referenced_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 * referencing_model
+                                        , QAbstractItemModel * referenced_model
+                                        , int referencing_key_column
+                                        , int referenced_key_column
+                                        , int referencing_key_role
+                                        , int referenced_key_role)
+  : QSortFilterProxyModel {nullptr} // ForeignKeyDelegate owns us
+  , m_ {referencing_model, referencing_key_column, referenced_key_column, referencing_key_role, referenced_key_role}
+{
+  setSourceModel (referenced_model);
+}
+
+CandidateKeyFilter::~CandidateKeyFilter ()
+{
+}
+
+void CandidateKeyFilter::set_active_key (QModelIndex const& index)
+{
+  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
+{
+  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 ();
+}

CandidateKeyFilter.hpp

@@ -0,0 +1,36 @@
+#ifndef CANDIDATE_KEY_FILTER_HPP_
+#define CANDIDATE_KEY_FILTER_HPP_
+
+#include <QSortFilterProxyModel>
+#include <QModelIndex>
+
+#include "pimpl_h.hpp"
+
+class QAbstractItemModel;
+
+class CandidateKeyFilter final
+  : public QSortFilterProxyModel
+{
+public:
+  explicit CandidateKeyFilter (QAbstractItemModel const * referencing_model
+                               , QAbstractItemModel * referenced_model
+                               , int referencing_key_column = 0
+                               , int referenced_key_column = 0
+                               , int referencing_key_role = Qt::EditRole
+                               , int referenced_key_role = Qt::EditRole);
+  ~CandidateKeyFilter ();
+
+  // this key is not to be filtered, usually because we want to allow
+  // it since we are editing the row that contains it this it is valid
+  // even though it is in use
+  void set_active_key (QModelIndex const& index = QModelIndex {});
+
+protected:
+  bool filterAcceptsRow (int candidate_row, QModelIndex const& candidate_parent) const override;
+
+private:
+  class impl;
+  pimpl<impl> m_;
+};
+
+#endif

Configuration.cpp

@@ -155,12 +155,14 @@
 #include <QFontDialog>
 #include <QColorDialog>
 #include <QSerialPortInfo>
+#include <QScopedPointer>
 #include <QDebug>
 
 #include "qt_helpers.hpp"
 #include "SettingsGroup.hpp"
 #include "FrequencyLineEdit.hpp"
 #include "FrequencyItemDelegate.hpp"
+#include "CandidateKeyFilter.hpp"
 #include "ForeignKeyDelegate.hpp"
 #include "TransceiverFactory.hpp"
 #include "Transceiver.hpp"
@@ -240,13 +242,13 @@ class StationDialog final
   : public QDialog
 {
 public:
-  explicit StationDialog (Bands * bands, QWidget * parent = nullptr)
+  explicit StationDialog (StationList const * stations, Bands * bands, QWidget * parent = nullptr)
     : QDialog {parent}
-    , bands_ {bands}
+    , filtered_bands_ {new CandidateKeyFilter {stations, bands}}
   {
     setWindowTitle (QApplication::applicationName () + " - " + tr ("Add Station"));
 
-    band_.setModel (bands_);
+    band_.setModel (filtered_bands_.data ());
       
     auto form_layout = new QFormLayout ();
     form_layout->addRow (tr ("&Band:"), &band_);
@@ -273,8 +275,14 @@ public:
     return {band_.currentText (), delta_.frequency_delta (), description_.text ()};
   }
 
+  int exec () override
+  {
+    filtered_bands_->set_active_key ();
+    return QDialog::exec ();
+  }
+
 private:
-  Bands * bands_;
+  QScopedPointer<CandidateKeyFilter> filtered_bands_;
 
   QComboBox band_;
   FrequencyDeltaLineEdit delta_;
@@ -724,7 +732,7 @@ Configuration::impl::impl (Configuration * self, QSettings * settings, QWidget *
   , stations_ {&bands_}
   , next_stations_ {&bands_}
   , frequency_dialog_ {new FrequencyDialog {this}}
-  , station_dialog_ {new StationDialog {&bands_, this}}
+  , station_dialog_ {new StationDialog {&next_stations_, &bands_, this}}
   , rig_active_ {false}
   , have_rig_ {false}
   , rig_changed_ {false}
@@ -922,7 +930,7 @@ Configuration::impl::impl (Configuration * self, QSettings * settings, QWidget *
   ui_->stations_table_view->setModel (&next_stations_);
   ui_->stations_table_view->sortByColumn (0, Qt::AscendingOrder);
   ui_->stations_table_view->setColumnWidth (1, 150);
-  ui_->stations_table_view->setItemDelegateForColumn (0, new ForeignKeyDelegate {&next_stations_, &bands_, 0, this});
+  ui_->stations_table_view->setItemDelegateForColumn (0, new ForeignKeyDelegate {&next_stations_, &bands_, 0, 0, this});
   ui_->stations_table_view->setItemDelegateForColumn (1, new FrequencyDeltaItemDelegate {this});
 
   station_delete_action_ = new QAction {tr ("&Delete"), ui_->stations_table_view};

ForeignKeyDelegate.cpp

@@ -1,63 +1,18 @@
 #include "ForeignKeyDelegate.hpp"
 
 #include <QComboBox>
-#include <QSortFilterProxyModel>
 
-class CandidateKeyFilter final
-  : public QSortFilterProxyModel
-{
-public:
-  explicit CandidateKeyFilter (QAbstractItemModel const * referencing_model
-                               , QAbstractItemModel * referenced_model
-                               , int referenced_key_column
-                               , int referencing_key_role
-                               , int referenced_key_role)
-    : QSortFilterProxyModel {nullptr} // ForeignKeyDelegate owns us
-    , referencing_ {referencing_model}
-    , referencing_key_role_ {referencing_key_role}
-    , referenced_key_column_ {referenced_key_column}
-    , referenced_key_role_ {referenced_key_role}
-  {
-    setSourceModel (referenced_model);
-  }
-
-  void set_active_key (QModelIndex const& index)
-  {
-    active_key_ = index;
-    invalidateFilter ();
-  }
-
-protected:
-  bool filterAcceptsRow (int candidate_row, QModelIndex const& candidate_parent) const override
-  {
-    auto candidate_key = sourceModel ()->index (candidate_row, referenced_key_column_, candidate_parent).data (referenced_key_role_);
-
-    // Include the current key.
-    if (candidate_key == active_key_.data (referencing_key_role_))
-      {
-        return true;
-      }
-
-    // Filter out any candidates already in the referencing key rows.
-    return referencing_->match (referencing_->index (0, active_key_.column ()), referencing_key_role_, candidate_key, 1, Qt::MatchExactly).isEmpty ();
-  }
-
-private:
-  QAbstractItemModel const * referencing_;
-  int referencing_key_role_;
-  int referenced_key_column_;
-  int referenced_key_role_;
-  QModelIndex active_key_;
-};
+#include "CandidateKeyFilter.hpp"
 
 ForeignKeyDelegate::ForeignKeyDelegate (QAbstractItemModel const * referencing_model
                                         , QAbstractItemModel * referenced_model
+                                        , int referencing_key_column
                                         , int referenced_key_column
                                         , QObject * parent
                                         , int referencing_key_role
                                         , int referenced_key_role)
   : QStyledItemDelegate {parent}
-  , candidate_key_filter_ {new CandidateKeyFilter {referencing_model, referenced_model, referenced_key_column, referencing_key_role, referenced_key_role}}
+  , candidate_key_filter_ {new CandidateKeyFilter {referencing_model, referenced_model, referencing_key_column, referenced_key_column, referencing_key_role, referenced_key_role}}
 {
 }
 

ForeignKeyDelegate.hpp

@@ -19,6 +19,7 @@ class ForeignKeyDelegate final
 public:
   explicit ForeignKeyDelegate (QAbstractItemModel const * referencing_model
                                , QAbstractItemModel * referenced_model
+                               , int referencing_key_column = 0
                                , int referenced_key_column = 0
                                , QObject * parent = nullptr
                                , int referencing_key_role = Qt::EditRole

FrequencyList.cpp

@@ -73,8 +73,9 @@ FrequencyList& FrequencyList::operator = (Frequencies frequencies)
   return *this;
 }
 
-auto FrequencyList::frequencies () const -> Frequencies
+auto FrequencyList::frequencies () -> Frequencies
 {
+  submit ();
   return m_->frequencies ();
 }
 

FrequencyList.hpp

@@ -41,7 +41,7 @@ public:
 
   // Load and store contents
   FrequencyList& operator = (Frequencies);
-  Frequencies frequencies () const;
+  Frequencies frequencies ();
 
   // Model API
   QModelIndex add (Frequency);

StationList.cpp

@@ -134,8 +134,9 @@ StationList& StationList::operator = (Stations stations)
   return *this;
 }
 
-auto StationList::stations () const -> Stations
+auto StationList::stations () -> Stations
 {
+  submit ();
   return m_->stations ();
 }
 

StationList.hpp

@@ -65,7 +65,7 @@ public:
 
   // Load and store contents.
   StationList& operator = (Stations);
-  Stations stations () const;
+  Stations stations ();
 
   //
   // Model API
@@ -83,14 +83,20 @@ private:
   pimpl<impl> m_;
 };
 
-// Station equivalence is based on band name alone.
+// Station equivalence
 inline
 bool operator == (StationList::Station const& lhs, StationList::Station const& rhs)
 {
-  return lhs.band_name_ == rhs.band_name_;
+  return lhs.band_name_ == rhs.band_name_
+    && lhs.offset_ == rhs.offset_
+    && lhs.antenna_description_ == rhs.antenna_description_;
 }
 
 Q_DECLARE_METATYPE (StationList::Station);
 Q_DECLARE_METATYPE (StationList::Stations);
 
+#if !defined (QT_NO_DEBUG_STREAM)
+QDebug operator << (QDebug debug, StationList::Station const&);
+#endif
+
 #endif