Refactoring map and ImGui functions from hover text

scwx-qt/source/scwx/qt/util/imgui.cpp

@@ -0,0 +1,105 @@
+#include <scwx/qt/util/imgui.hpp>
+#include <scwx/qt/manager/resource_manager.hpp>
+#include <scwx/qt/manager/settings_manager.hpp>
+#include <scwx/util/logger.hpp>
+
+#include <mutex>
+
+#include <imgui.h>
+
+namespace scwx
+{
+namespace qt
+{
+namespace util
+{
+
+static const std::string logPrefix_ = "scwx::qt::util::imgui";
+static const auto        logger_    = scwx::util::Logger::Create(logPrefix_);
+
+class ImGui::Impl
+{
+public:
+   explicit Impl() {}
+   ~Impl() {}
+
+   void Initialize();
+   void UpdateMonospaceFont();
+
+   bool initialized_ {false};
+
+   ImFont* monospaceFont_ {nullptr};
+};
+
+ImGui::ImGui() : p(std::make_unique<Impl>()) {}
+ImGui::~ImGui() = default;
+
+ImGui::ImGui(ImGui&&) noexcept            = default;
+ImGui& ImGui::operator=(ImGui&&) noexcept = default;
+
+void ImGui::Impl::Initialize()
+{
+   if (initialized_)
+   {
+      return;
+   }
+
+   logger_->debug("Initialize");
+
+   // Configure monospace font
+   UpdateMonospaceFont();
+   manager::SettingsManager::general_settings()
+      .font_sizes()
+      .RegisterValueChangedCallback([this](const std::vector<std::int64_t>&)
+                                    { UpdateMonospaceFont(); });
+
+   initialized_ = true;
+}
+
+void ImGui::Impl::UpdateMonospaceFont()
+{
+   // Get monospace font size
+   std::size_t fontSize = 16;
+   auto        fontSizes =
+      manager::SettingsManager::general_settings().font_sizes().GetValue();
+   if (fontSizes.size() > 1)
+   {
+      fontSize = fontSizes[1];
+   }
+   else if (fontSizes.size() > 0)
+   {
+      fontSize = fontSizes[0];
+   }
+
+   // Get monospace font pointer
+   auto monospace =
+      manager::ResourceManager::Font(types::Font::Inconsolata_Regular);
+   auto monospaceFont = monospace->ImGuiFont(fontSize);
+
+   // Store monospace font pointer if not null
+   if (monospaceFont != nullptr)
+   {
+      monospaceFont_ = monospace->ImGuiFont(fontSize);
+   }
+}
+
+void ImGui::DrawTooltip(const std::string& hoverText)
+{
+   p->Initialize();
+
+   ::ImGui::BeginTooltip();
+   ::ImGui::PushFont(p->monospaceFont_);
+   ::ImGui::TextUnformatted(hoverText.c_str());
+   ::ImGui::PopFont();
+   ::ImGui::EndTooltip();
+}
+
+ImGui& ImGui::Instance()
+{
+   static ImGui instance_ {};
+   return instance_;
+}
+
+} // namespace util
+} // namespace qt
+} // namespace scwx

scwx-qt/source/scwx/qt/util/imgui.hpp

@@ -0,0 +1,37 @@
+#pragma once
+
+#include <memory>
+#include <string>
+
+namespace scwx
+{
+namespace qt
+{
+namespace util
+{
+
+class ImGui
+{
+public:
+   explicit ImGui();
+   ~ImGui();
+
+   ImGui(const ImGui&)            = delete;
+   ImGui& operator=(const ImGui&) = delete;
+
+   ImGui(ImGui&&) noexcept;
+   ImGui& operator=(ImGui&&) noexcept;
+
+   void DrawTooltip(const std::string& hoverText);
+
+   static ImGui& Instance();
+
+private:
+   class Impl;
+
+   std::unique_ptr<Impl> p;
+};
+
+} // namespace util
+} // namespace qt
+} // namespace scwx

scwx-qt/source/scwx/qt/util/maplibre.cpp

@@ -43,6 +43,36 @@ glm::vec2 GetMapScale(const QMapLibreGL::CustomLayerRenderParameters& params)
    return glm::vec2 {xScale, yScale};
 }
 
+bool IsPointInPolygon(const std::vector<glm::vec2>& vertices,
+                      const glm::vec2&              point)
+{
+   bool inPolygon = true;
+
+   // For each vertex, assume counterclockwise order
+   for (std::size_t i = 0; i < vertices.size(); ++i)
+   {
+      const auto& p1 = vertices[i];
+      const auto& p2 =
+         (i == vertices.size() - 1) ? vertices[0] : vertices[i + 1];
+
+      // Test which side of edge point lies on
+      const float a = -(p2.y - p1.y);
+      const float b = p2.x - p1.x;
+      const float c = -(a * p1.x + b * p1.y);
+      const float d = a * point.x + b * point.y + c;
+
+      // If d < 0, the point is on the right-hand side, and outside of the
+      // polygon
+      if (d < 0)
+      {
+         inPolygon = false;
+         break;
+      }
+   }
+
+   return inPolygon;
+}
+
 glm::vec2 LatLongToScreenCoordinate(const QMapLibreGL::Coordinate& coordinate)
 {
    static constexpr double RAD2DEG_D = 180.0 / M_PI;

scwx-qt/source/scwx/qt/util/maplibre.hpp

@@ -17,6 +17,18 @@ units::length::meters<double>
 GetMapDistance(const QMapLibreGL::CustomLayerRenderParameters& params);
 glm::mat4 GetMapMatrix(const QMapLibreGL::CustomLayerRenderParameters& params);
 glm::vec2 GetMapScale(const QMapLibreGL::CustomLayerRenderParameters& params);
+
+/**
+ * @brief Determine whether a point lies within a polygon
+ *
+ * @param [in] vertices Counterclockwise vertices
+ * @param [in] point Point to test
+ *
+ * @return Whether the point lies within the polygon
+ */
+bool IsPointInPolygon(const std::vector<glm::vec2>& vertices,
+                      const glm::vec2&              point);
+
 glm::vec2 LatLongToScreenCoordinate(const QMapLibreGL::Coordinate& coordinate);
 
 } // namespace maplibre