use correct method for getting row count from the DB; use signals/slots to inform the CabrilloLogWindow the qso_count has changed

models/CabrilloLog.cpp

@@ -73,7 +73,9 @@ public:
   Configuration const * configuration_;
   QSqlQuery mutable dupe_query_;
   QSqlQuery mutable export_query_;
+  QSqlQuery mutable qso_count_query_;
   bool adding_row_;
+  int n_qso();
 };
 
 CabrilloLog::impl::impl (CabrilloLog * self, Configuration const * configuration)
@@ -109,6 +111,7 @@ CabrilloLog::impl::impl (CabrilloLog * self, Configuration const * configuration
         {
           Q_EMIT self_->data_changed ();
         }
+      Q_EMIT self_->qso_count_changed(self_->n_qso());
     });
 
   SQL_error_check (*this, &QSqlTableModel::select);
@@ -132,6 +135,10 @@ CabrilloLog::impl::impl (CabrilloLog * self, Configuration const * configuration
                    "    cabrillo_log_v2 "
                    "  ORDER BY "
                    "    \"when\"");
+
+  SQL_error_check (qso_count_query_, &QSqlQuery::prepare,
+                   "SELECT COUNT(*) FROM cabrillo_log_v2");
+
 }
 
 void CabrilloLog::impl::create_table ()
@@ -237,7 +244,7 @@ bool CabrilloLog::add_QSO (Frequency frequency, QString const& mode, QDateTime c
 
   m_->adding_row_ = false;
   m_->setEditStrategy (QSqlTableModel::OnFieldChange);
-
+  Q_EMIT this->qso_count_changed(this->n_qso());
   return ok;
 }
 
@@ -260,7 +267,9 @@ bool CabrilloLog::dupe (Frequency frequency, QString const& call) const
 
 int CabrilloLog::n_qso()
 {
-  return m_->rowCount();
+  SQL_error_check (m_->qso_count_query_, static_cast<bool (QSqlQuery::*) ()> (&QSqlQuery::exec));
+  m_->qso_count_query_.first();
+  return m_->qso_count_query_.value(0).toInt();
 }
 
 void CabrilloLog::reset ()

models/CabrilloLog.hpp

@@ -39,6 +39,7 @@ public:
   worked_set unique_DXCC_entities (AD1CCty const *) const;
 
   Q_SIGNAL void data_changed () const;
+  Q_SIGNAL void qso_count_changed (int) const;
 
 private:
   class impl;

widgets/CabrilloLogWindow.cpp

@@ -72,6 +72,7 @@ CabrilloLogWindow::CabrilloLogWindow (QSettings * settings, Configuration const
   auto h_header = m_->ui_.log_table_view->horizontalHeader ();
   m_->ui_.log_table_view->verticalHeader()->setVisible(false); // turn off line numbers for the table view
   h_header->moveSection (7, 1); // band to first column
+
 }
 
 CabrilloLogWindow::~CabrilloLogWindow ()
@@ -88,7 +89,6 @@ void CabrilloLogWindow::log_model_changed (int row)
     {
       m_->log_model_->select ();
     }
-  this->set_nQSO(m_->log_model_->rowCount());
 }
 
 void CabrilloLogWindow::set_nQSO(int n)

widgets/CabrilloLogWindow.hpp

@@ -16,7 +16,7 @@ public:
   explicit CabrilloLogWindow (QSettings *, Configuration const *, QSqlTableModel * cabrillo_log_model
                               , QWidget * parent = nullptr);
   ~CabrilloLogWindow ();
-  void set_nQSO(int n);
+  Q_SLOT void set_nQSO(int n);
 
 private:
   void log_model_changed (int row) override;

widgets/CabrilloLogWindow.ui

@@ -28,19 +28,15 @@
     </widget>
    </item>
    <item>
-    <widget class="QLabel" name="nQSO_lineEdit">
+    <widget class="QLineEdit" name="nQSO_lineEdit">
      <property name="maximumSize">
       <size>
        <width>100</width>
        <height>16777215</height>
       </size>
      </property>
-     <property name="styleSheet">
-      <string notr="true">* {
-       font-family: Courier;
-       font-size: 10pt;
-       font-weight: bold;
-       }</string>
+     <property name="readOnly">
+      <bool>true</bool>
      </property>
      <property name="text">
       <string>0  QSOs</string>

widgets/mainwindow.cpp

@@ -2779,7 +2779,9 @@ void MainWindow::on_contest_log_action_triggered()
   m_contestLogWindow->showNormal ();
   m_contestLogWindow->raise ();
   m_contestLogWindow->activateWindow ();
-  //m_contestLogWindow->set_nQSO(m_logBook.contest_log()->n_qso());
+  // connect signal from m_logBook.contest_log to m_contestLogWindow
+  connect(m_logBook.contest_log(), &CabrilloLog::qso_count_changed, m_contestLogWindow.data (), &CabrilloLogWindow::set_nQSO);
+  m_contestLogWindow->set_nQSO(m_logBook.contest_log()->n_qso());
 }
 
 void MainWindow::on_actionColors_triggered()