Stats: Added a confirmation dialog for displaying over 50k QSOs on the map

Author: foldynl

Changelog

@@ -8,6 +8,7 @@ TBC - 0.39.0
 - [CHANGED] - Awards - Bands are displayed based on the Settings (issue #452)
 - [CHANGED] - WSJTX - More reliable detection of CQ stations (PR #471 @aa5sh)
 - [CHANGED] - WSJTX - SOTA/POTA/WWFF/SIG are being added to the logged QSO (PR #463 @aa5sh)
+- [CHANGED] - Stats - Add a confirmation dialog for displaying over 50k QSOs on the map
 - Fixed WSJT-X does not emit band change if rig is disconnected (issue #447)
 - Fixed Wrong import of ADIF file of another log program (issue #455)
 - Fixed WSJTX log record is stored incorrectly if it contains non-ASCII chars(issue #458)

ui/StatisticsWidget.cpp

@@ -575,12 +575,15 @@ void StatisticsWidget::drawPointsOnMap(QSqlQuery &query)
 
     QList<QString> stations;
 
+    qulonglong count = 0;
+
     while ( query.next() )
     {
         const Gridsquare stationGrid(query.value(1).toString());
 
         if ( stationGrid.isValid() )
         {
+            count++;
             double lat = stationGrid.getLatitude();
             double lon = stationGrid.getLongitude();
             stations.append(QString("[\"%1\", %2, %3, %4]").arg(query.value(0).toString())
@@ -590,6 +593,16 @@ void StatisticsWidget::drawPointsOnMap(QSqlQuery &query)
         }
     }
 
+    if ( count > 50000 )
+    {
+        QMessageBox::StandardButton reply;
+        reply = QMessageBox::question(this, tr("Statistics"), tr("Over 50000 QSOs. Display them?"),
+                                      QMessageBox::Yes|QMessageBox::No);
+
+        if ( reply != QMessageBox::Yes )
+            stations.clear();
+    }
+
     QString javaScript = QString("grids_confirmed = [];"
                                  "grids_worked = [];"
                                  "drawPoints([%1]);"