Calculate distance to each radar site from current location

scwx-qt/source/scwx/qt/main/main_window.cpp

@@ -77,6 +77,7 @@ public:
 
    void ConfigureMapLayout();
    void ConnectMapSignals();
+   void ConnectOtherSignals();
    void HandleFocusChange(QWidget* focused);
    void SelectElevation(map::MapWidget* mapWidget, float elevation);
    void SelectRadarProduct(map::MapWidget*           mapWidget,
@@ -180,35 +181,7 @@ MainWindow::MainWindow(QWidget* parent) :
    }
 
    p->ConnectMapSignals();
-
+   p->ConnectOtherSignals();
-   connect(qApp,
-           &QApplication::focusChanged,
-           this,
-           [=](QWidget* /*old*/, QWidget* now) { p->HandleFocusChange(now); });
-   connect(p->level2ProductsWidget_,
-           &ui::Level2ProductsWidget::RadarProductSelected,
-           this,
-           [&](common::RadarProductGroup group,
-               const std::string&        productName,
-               int16_t                   productCode) {
-              p->SelectRadarProduct(
-                 p->activeMap_, group, productName, productCode);
-           });
-   connect(p->level3ProductsWidget_,
-           &ui::Level3ProductsWidget::RadarProductSelected,
-           this,
-           [&](common::RadarProductGroup group,
-               const std::string&        productName,
-               int16_t                   productCode) {
-              p->SelectRadarProduct(
-                 p->activeMap_, group, productName, productCode);
-           });
-   connect(p->level2SettingsWidget_,
-           &ui::Level2SettingsWidget::ElevationSelected,
-           this,
-           [&](float elevation)
-           { p->SelectElevation(p->activeMap_, elevation); });
-
    p->HandleFocusChange(p->activeMap_);
 }
 
@@ -361,14 +334,24 @@ void MainWindowImpl::ConfigureMapLayout()
 
 void MainWindowImpl::ConnectMapSignals()
 {
-   std::for_each(maps_.cbegin(),
+   for (const auto& mapWidget : maps_)
-                 maps_.cend(),
-                 [&](auto& mapWidget)
    {
       connect(mapWidget,
               &map::MapWidget::MapParametersChanged,
               this,
               &MainWindowImpl::UpdateMapParameters);
+      connect(
+         mapWidget,
+         &map::MapWidget::MapParametersChanged,
+         this,
+         [&](double latitude, double longitude)
+         {
+            if (mapWidget == activeMap_)
+            {
+               emit mainWindow_->ActiveMapMoved(latitude, longitude);
+            }
+         },
+         Qt::QueuedConnection);
 
       connect(
          mapWidget,
@@ -378,8 +361,7 @@ void MainWindowImpl::ConnectMapSignals()
          {
             if (mapWidget == activeMap_)
             {
-                             UpdateRadarProductSelection(
+               UpdateRadarProductSelection(mapWidget->GetRadarProductGroup(),
-                                mapWidget->GetRadarProductGroup(),
                                            mapWidget->GetRadarProductName());
                UpdateRadarProductSettings();
                UpdateRadarSite();
@@ -400,7 +382,39 @@ void MainWindowImpl::ConnectMapSignals()
             }
          },
          Qt::QueuedConnection);
+   }
+}
+
+void MainWindowImpl::ConnectOtherSignals()
+{
+   connect(qApp,
+           &QApplication::focusChanged,
+           mainWindow_,
+           [=](QWidget* /*old*/, QWidget* now) { HandleFocusChange(now); });
+   connect(level2ProductsWidget_,
+           &ui::Level2ProductsWidget::RadarProductSelected,
+           mainWindow_,
+           [&](common::RadarProductGroup group,
+               const std::string&        productName,
+               int16_t                   productCode) {
+              SelectRadarProduct(activeMap_, group, productName, productCode);
            });
+   connect(level3ProductsWidget_,
+           &ui::Level3ProductsWidget::RadarProductSelected,
+           mainWindow_,
+           [&](common::RadarProductGroup group,
+               const std::string&        productName,
+               int16_t                   productCode) {
+              SelectRadarProduct(activeMap_, group, productName, productCode);
+           });
+   connect(level2SettingsWidget_,
+           &ui::Level2SettingsWidget::ElevationSelected,
+           mainWindow_,
+           [&](float elevation) { SelectElevation(activeMap_, elevation); });
+   connect(mainWindow_,
+           &MainWindow::ActiveMapMoved,
+           radarSiteDialog_,
+           &ui::RadarSiteDialog::HandleMapUpdate);
 }
 
 void MainWindowImpl::HandleFocusChange(QWidget* focused)

scwx-qt/source/scwx/qt/main/main_window.hpp

@@ -28,6 +28,9 @@ public:
 
    void showEvent(QShowEvent* event) override;
 
+signals:
+   void ActiveMapMoved(double latitude, double longitude);
+
 private slots:
    void on_actionOpen_triggered();
    void on_actionExit_triggered();

scwx-qt/source/scwx/qt/model/radar_site_model.cpp

@@ -4,6 +4,10 @@
 #include <scwx/common/geographic.hpp>
 #include <scwx/util/logger.hpp>
 
+#include <format>
+
+#include <GeographicLib/Geodesic.hpp>
+
 namespace scwx
 {
 namespace qt
@@ -14,7 +18,7 @@ namespace model
 static const std::string logPrefix_ = "scwx::qt::model::radar_site_model";
 static const auto        logger_    = scwx::util::Logger::Create(logPrefix_);
 
-static constexpr size_t kNumColumns = 7u;
+static constexpr size_t kNumColumns = 8u;
 
 class RadarSiteModelImpl
 {
@@ -23,6 +27,12 @@ public:
    ~RadarSiteModelImpl() = default;
 
    QList<std::shared_ptr<config::RadarSite>> radarSites_;
+
+   GeographicLib::Geodesic geodesic_;
+
+   std::unordered_map<std::string, double> distanceMap_;
+   scwx::common::DistanceType              distanceDisplay_;
+   scwx::common::Coordinate                previousPosition_;
 };
 
 RadarSiteModel::RadarSiteModel(QObject* parent) :
@@ -81,6 +91,26 @@ QVariant RadarSiteModel::data(const QModelIndex& index, int role) const
          }
       case 6:
          return QString::fromStdString(site->type_name());
+      case 7:
+         if (role == Qt::DisplayRole)
+         {
+            if (p->distanceDisplay_ == scwx::common::DistanceType::Miles)
+            {
+               return QString("%1 mi").arg(
+                  static_cast<uint32_t>(p->distanceMap_.at(site->id()) *
+                                        scwx::common::kMilesPerMeter));
+            }
+            else
+            {
+               return QString("%1 km").arg(
+                  static_cast<uint32_t>(p->distanceMap_.at(site->id()) *
+                                        scwx::common::kKilometersPerMeter));
+            }
+         }
+         else
+         {
+            return p->distanceMap_.at(site->id());
+         }
       default:
          break;
       }
@@ -113,6 +143,8 @@ QVariant RadarSiteModel::headerData(int             section,
             return tr("Longitude");
          case 6:
             return tr("Type");
+         case 7:
+            return tr("Distance");
          default:
             break;
          }
@@ -122,7 +154,30 @@ QVariant RadarSiteModel::headerData(int             section,
    return QVariant();
 }
 
-RadarSiteModelImpl::RadarSiteModelImpl() : radarSites_ {}
+void RadarSiteModel::HandleMapUpdate(double latitude, double longitude)
+{
+   logger_->trace("Handle map update: {}, {}", latitude, longitude);
+
+   double distanceInMeters;
+
+   for (const auto& site : p->radarSites_)
+   {
+      p->geodesic_.Inverse(latitude,
+                           longitude,
+                           site->latitude(),
+                           site->longitude(),
+                           distanceInMeters);
+      p->distanceMap_[site->id()] = distanceInMeters;
+   }
+}
+
+RadarSiteModelImpl::RadarSiteModelImpl() :
+    radarSites_ {},
+    geodesic_(GeographicLib::Constants::WGS84_a(),
+              GeographicLib::Constants::WGS84_f()),
+    distanceMap_ {},
+    distanceDisplay_ {scwx::common::DistanceType::Miles},
+    previousPosition_ {}
 {
    // Get all loaded radar sites
    std::vector<std::shared_ptr<config::RadarSite>> radarSites =
@@ -131,6 +186,7 @@ RadarSiteModelImpl::RadarSiteModelImpl() : radarSites_ {}
    // Setup radar site list
    for (auto& site : radarSites)
    {
+      distanceMap_[site->id()] = 0.0;
       radarSites_.emplace_back(std::move(site));
    }
 }

scwx-qt/source/scwx/qt/model/radar_site_model.hpp

@@ -28,6 +28,8 @@ public:
                        Qt::Orientation orientation,
                        int             role = Qt::DisplayRole) const override;
 
+   void HandleMapUpdate(double latitude, double longitude);
+
 private:
    std::unique_ptr<RadarSiteModelImpl> p;
 

scwx-qt/source/scwx/qt/ui/radar_site_dialog.cpp

@@ -3,6 +3,7 @@
 
 #include <scwx/qt/common/types.hpp>
 #include <scwx/qt/model/radar_site_model.hpp>
+#include <scwx/common/geographic.hpp>
 #include <scwx/util/logger.hpp>
 
 #include <QSortFilterProxyModel>
@@ -23,7 +24,9 @@ public:
    explicit RadarSiteDialogImpl(RadarSiteDialog* self) :
        self_ {self},
        radarSiteModel_ {new model::RadarSiteModel(self_)},
-       proxyModel_ {new QSortFilterProxyModel(self_)}
+       proxyModel_ {new QSortFilterProxyModel(self_)},
+       mapPosition_ {},
+       mapUpdateDeferred_ {false}
    {
       proxyModel_->setSourceModel(radarSiteModel_);
       proxyModel_->setSortRole(common::SortRole);
@@ -35,6 +38,9 @@ public:
    RadarSiteDialog*       self_;
    model::RadarSiteModel* radarSiteModel_;
    QSortFilterProxyModel* proxyModel_;
+
+   scwx::common::Coordinate mapPosition_;
+   bool                     mapUpdateDeferred_;
 };
 
 RadarSiteDialog::RadarSiteDialog(QWidget* parent) :
@@ -63,6 +69,32 @@ RadarSiteDialog::~RadarSiteDialog()
    delete ui;
 }
 
+void RadarSiteDialog::showEvent(QShowEvent* event)
+{
+   if (p->mapUpdateDeferred_)
+   {
+      p->radarSiteModel_->HandleMapUpdate(p->mapPosition_.latitude_,
+                                          p->mapPosition_.longitude_);
+      p->mapUpdateDeferred_ = false;
+   }
+
+   QDialog::showEvent(event);
+}
+
+void RadarSiteDialog::HandleMapUpdate(double latitude, double longitude)
+{
+   p->mapPosition_ = {latitude, longitude};
+
+   if (isVisible())
+   {
+      p->radarSiteModel_->HandleMapUpdate(latitude, longitude);
+   }
+   else
+   {
+      p->mapUpdateDeferred_ = true;
+   }
+}
+
 } // namespace ui
 } // namespace qt
 } // namespace scwx

scwx-qt/source/scwx/qt/ui/radar_site_dialog.hpp

@@ -24,6 +24,12 @@ public:
    explicit RadarSiteDialog(QWidget* parent = nullptr);
    ~RadarSiteDialog();
 
+protected:
+   void showEvent(QShowEvent*) override;
+
+public slots:
+   void HandleMapUpdate(double latitude, double longitude);
+
 private:
    std::unique_ptr<RadarSiteDialogImpl> p;
    Ui::RadarSiteDialog*                 ui;

wxdata/include/scwx/common/geographic.hpp

@@ -7,6 +7,9 @@ namespace scwx
 namespace common
 {
 
+constexpr double kMilesPerMeter      = 0.00062137119;
+constexpr double kKilometersPerMeter = 0.001;
+
 /**
  * @brief Coordinate type to hold latitude and longitude of a location.
  */
@@ -34,6 +37,12 @@ enum class DegreeStringType
    DegreesMinutesSeconds
 };
 
+enum class DistanceType
+{
+   Kilometers,
+   Miles
+};
+
 std::string
 GetLatitudeString(double           latitude,
                   DegreeStringType type = DegreeStringType::Decimal);