Display the selected speed units for level 2 data

scwx-qt/source/scwx/qt/map/radar_product_layer.cpp

@@ -395,15 +395,25 @@ bool RadarProductLayer::RunMousePicking(
             std::string suffix {};
             std::string hoverText;
 
+            // Determine units from radar product view
+            units = radarProductView->units();
+            if (!units.empty())
+            {
+               f = f * radarProductView->unit_scale();
+            }
+            else
+            {
                std::shared_ptr<common::ColorTable> colorTable =
                   radarProductView->color_table();
 
                if (colorTable != nullptr)
                {
-               // Scale data value according to the color table, and get units
+                  // Scale data value according to the color table, and get
+                  // units
                   f     = f * colorTable->scale() + colorTable->offset();
                   units = colorTable->units();
                }
+            }
 
             if (code.has_value() &&
                 code.value() == wsr88d::DataLevelCode::Topped)

scwx-qt/source/scwx/qt/types/unit_types.cpp

@@ -4,6 +4,7 @@
 #include <unordered_map>
 
 #include <boost/algorithm/string.hpp>
+#include <units/velocity.h>
 
 namespace scwx
 {
@@ -15,8 +16,8 @@ namespace types
 static const std::unordered_map<AccumulationUnits, std::string>
    accumulationUnitsAbbreviation_ {{AccumulationUnits::Inches, "in"},
                                    {AccumulationUnits::Millimeters, "mm"},
-                                   {AccumulationUnits::User, "?"},
+                                   {AccumulationUnits::User, ""},
-                                   {AccumulationUnits::Unknown, "?"}};
+                                   {AccumulationUnits::Unknown, ""}};
 
 static const std::unordered_map<AccumulationUnits, std::string>
    accumulationUnitsName_ {{AccumulationUnits::Inches, "Inches"},
@@ -27,8 +28,8 @@ static const std::unordered_map<AccumulationUnits, std::string>
 static const std::unordered_map<EchoTopsUnits, std::string>
    echoTopsUnitsAbbreviation_ {{EchoTopsUnits::Kilofeet, "kft"},
                                {EchoTopsUnits::Kilometers, "km"},
-                               {EchoTopsUnits::User, "?"},
+                               {EchoTopsUnits::User, ""},
-                               {EchoTopsUnits::Unknown, "?"}};
+                               {EchoTopsUnits::Unknown, ""}};
 
 static const std::unordered_map<EchoTopsUnits, std::string> echoTopsUnitsName_ {
    {EchoTopsUnits::Kilofeet, "Kilofeet"},
@@ -41,8 +42,8 @@ static const std::unordered_map<SpeedUnits, std::string>
                             {SpeedUnits::Knots, "kts"},
                             {SpeedUnits::MilesPerHour, "mph"},
                             {SpeedUnits::MetersPerSecond, "m/s"},
-                            {SpeedUnits::User, "?"},
+                            {SpeedUnits::User, ""},
-                            {SpeedUnits::Unknown, "?"}};
+                            {SpeedUnits::Unknown, ""}};
 
 static const std::unordered_map<SpeedUnits, std::string> speedUnitsName_ {
    {SpeedUnits::KilometersPerHour, "Kilometers per hour"},
@@ -52,6 +53,18 @@ static const std::unordered_map<SpeedUnits, std::string> speedUnitsName_ {
    {SpeedUnits::User, "User-defined"},
    {SpeedUnits::Unknown, "?"}};
 
+static constexpr auto speedUnitsBase_ = units::meters_per_second<float> {1.0f};
+static const std::unordered_map<SpeedUnits, float> speedUnitsScale_ {
+   {SpeedUnits::KilometersPerHour,
+    (speedUnitsBase_ / units::kilometers_per_hour<float> {1.0f})},
+   {SpeedUnits::Knots, (speedUnitsBase_ / units::knots<float> {1.0f})},
+   {SpeedUnits::MilesPerHour,
+    (speedUnitsBase_ / units::miles_per_hour<float> {1.0f})},
+   {SpeedUnits::MetersPerSecond,
+    (speedUnitsBase_ / units::meters_per_second<float> {1.0f})},
+   {SpeedUnits::User, 1.0f},
+   {SpeedUnits::Unknown, 1.0f}};
+
 SCWX_GET_ENUM(AccumulationUnits,
               GetAccumulationUnitsFromName,
               accumulationUnitsName_)
@@ -88,6 +101,11 @@ const std::string& GetSpeedUnitsName(SpeedUnits units)
    return speedUnitsName_.at(units);
 }
 
+float GetSpeedUnitsScale(SpeedUnits units)
+{
+   return speedUnitsScale_.at(units);
+}
+
 } // namespace types
 } // namespace qt
 } // namespace scwx

scwx-qt/source/scwx/qt/types/unit_types.hpp

@@ -58,6 +58,7 @@ EchoTopsUnits      GetEchoTopsUnitsFromName(const std::string& name);
 const std::string& GetSpeedUnitsAbbreviation(SpeedUnits units);
 const std::string& GetSpeedUnitsName(SpeedUnits units);
 SpeedUnits         GetSpeedUnitsFromName(const std::string& name);
+float              GetSpeedUnitsScale(SpeedUnits units);
 
 } // namespace types
 } // namespace qt

scwx-qt/source/scwx/qt/view/level2_product_view.cpp

@@ -1,4 +1,6 @@
 #include <scwx/qt/view/level2_product_view.hpp>
+#include <scwx/qt/settings/unit_settings.hpp>
+#include <scwx/qt/types/unit_types.hpp>
 #include <scwx/qt/util/geographic_lib.hpp>
 #include <scwx/common/constants.hpp>
 #include <scwx/util/logger.hpp>
@@ -68,17 +70,33 @@ public:
        savedScale_ {0.0f},
        savedOffset_ {0.0f}
    {
+      auto& unitSettings = settings::UnitSettings::Instance();
+
       coordinates_.resize(kMaxCoordinates_);
 
       SetProduct(product);
+
+      speedUnitsCallbackUuid_ =
+         unitSettings.speed_units().RegisterValueChangedCallback(
+            [this](const std::string& value) { UpdateSpeedUnits(value); });
+
+      UpdateSpeedUnits(unitSettings.speed_units().GetValue());
    }
-   ~Level2ProductViewImpl() { threadPool_.join(); };
+   ~Level2ProductViewImpl()
+   {
+      auto& unitSettings = settings::UnitSettings::Instance();
+      unitSettings.speed_units().UnregisterValueChangedCallback(
+         speedUnitsCallbackUuid_);
+
+      threadPool_.join();
+   };
 
    void
    ComputeCoordinates(std::shared_ptr<wsr88d::rda::ElevationScan> radarData);
 
    void SetProduct(const std::string& productName);
    void SetProduct(common::Level2Product product);
+   void UpdateSpeedUnits(const std::string& name);
 
    Level2ProductView* self_;
 
@@ -116,6 +134,9 @@ public:
    std::shared_ptr<common::ColorTable> savedColorTable_;
    float                               savedScale_;
    float                               savedOffset_;
+
+   boost::uuids::uuid speedUnitsCallbackUuid_ {};
+   types::SpeedUnits  speedUnits_ {types::SpeedUnits::Unknown};
 };
 
 Level2ProductView::Level2ProductView(
@@ -221,6 +242,36 @@ std::chrono::system_clock::time_point Level2ProductView::sweep_time() const
    return p->sweepTime_;
 }
 
+float Level2ProductView::unit_scale() const
+{
+   switch (p->dataBlockType_)
+   {
+   case wsr88d::rda::DataBlockType::MomentVel:
+   case wsr88d::rda::DataBlockType::MomentSw:
+      return types::GetSpeedUnitsScale(p->speedUnits_);
+
+   default:
+      break;
+   }
+
+   return 1.0f;
+}
+
+std::string Level2ProductView::units() const
+{
+   switch (p->dataBlockType_)
+   {
+   case wsr88d::rda::DataBlockType::MomentVel:
+   case wsr88d::rda::DataBlockType::MomentSw:
+      return types::GetSpeedUnitsAbbreviation(p->speedUnits_);
+
+   default:
+      break;
+   }
+
+   return {};
+}
+
 uint16_t Level2ProductView::vcp() const
 {
    return p->vcp_;
@@ -323,6 +374,11 @@ void Level2ProductViewImpl::SetProduct(common::Level2Product product)
    }
 }
 
+void Level2ProductViewImpl::UpdateSpeedUnits(const std::string& name)
+{
+   speedUnits_ = types::GetSpeedUnitsFromName(name);
+}
+
 void Level2ProductView::UpdateColorTableLut()
 {
    if (p->momentDataBlock0_ == nullptr || //

scwx-qt/source/scwx/qt/view/level2_product_view.hpp

@@ -35,6 +35,8 @@ public:
    float                                 elevation() const override;
    float                                 range() const override;
    std::chrono::system_clock::time_point sweep_time() const override;
+   float                                 unit_scale() const override;
+   std::string                           units() const override;
    std::uint16_t                         vcp() const override;
    const std::vector<float>&             vertices() const override;
 

scwx-qt/source/scwx/qt/view/level3_product_view.cpp

@@ -143,6 +143,16 @@ uint16_t Level3ProductView::color_table_max() const
    }
 }
 
+float Level3ProductView::unit_scale() const
+{
+   return 1.0f;
+}
+
+std::string Level3ProductView::units() const
+{
+   return {};
+}
+
 std::shared_ptr<wsr88d::rpg::GraphicProductMessage>
 Level3ProductView::graphic_product_message() const
 {

scwx-qt/source/scwx/qt/view/level3_product_view.hpp

@@ -30,6 +30,8 @@ public:
                  color_table_lut() const override;
    std::uint16_t color_table_min() const override;
    std::uint16_t color_table_max() const override;
+   float         unit_scale() const override;
+   std::string   units() const override;
 
    void LoadColorTable(std::shared_ptr<common::ColorTable> colorTable) override;
 

scwx-qt/source/scwx/qt/view/radar_product_view.hpp

@@ -42,6 +42,8 @@ public:
    virtual float                                 elevation() const;
    virtual float                                 range() const;
    virtual std::chrono::system_clock::time_point sweep_time() const;
+   virtual float                                 unit_scale() const = 0;
+   virtual std::string                           units() const      = 0;
    virtual std::uint16_t                         vcp() const        = 0;
    virtual const std::vector<float>&             vertices() const   = 0;