From c2fa3695261a02691b48c4c11794b52cacbe11bc Mon Sep 17 00:00:00 2001
From: mc_doge_ <wangyaocing@outlook.com>
Date: Fri, 7 Aug 2026 16:16:15 +0800
Subject: [PATCH] Statistics: Add QSO histogram by operator callsign

---
 ui/StatisticsWidget.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/ui/StatisticsWidget.cpp b/ui/StatisticsWidget.cpp
index 8282e448..add40e74 100644
--- a/ui/StatisticsWidget.cpp
+++ b/ui/StatisticsWidget.cpp
@@ -282,6 +282,7 @@ void StatisticsWidget::refreshGraph()
          switch ( ui->statTypeSecCombo->currentIndex() )
          {
          case 0:  // Distance
+         {
              QString distCoef = QString::number(Gridsquare::localeDistanceCoef(locale));
              stmt = QString("WITH hist AS ( "
                     " SELECT CAST((distance * %1)/500.00 AS INTEGER) * 500 as dist_floor, "
@@ -297,6 +298,12 @@ void StatisticsWidget::refreshGraph()
                     " ORDER BY 1").arg(distCoef);
              break;
          }
+         case 1:  // Operator callsigns
+             stmt = "SELECT COALESCE(NULLIF(TRIM(operator), ''), '" + tr("Not specified") + "'), COUNT(1) "
+                    "FROM contacts WHERE " + genericFilter.join(" AND ") + " "
+                    "GROUP BY 1 ORDER BY 2 DESC, 1";
+             break;
+         }
 
          qCDebug(runtime) << stmt;
 
@@ -723,6 +730,7 @@ void StatisticsWidget::setSubTypesCombo(int mainTypeIdx)
         QString unit;
         Gridsquare::distance2localeUnitDistance(0, unit, locale);
         ui->statTypeSecCombo->addItem(tr("Distance") + QString(" [%1]").arg(unit));
+        ui->statTypeSecCombo->addItem(tr("Operator Callsign"));
     }
     break;