Merge branch 'feature/imgui-debug' into develop

external/imgui-backend-qt

@@ -1 +1 @@
-Subproject commit 6944775887e61d4d8185568e0205af5b3b483801
+Subproject commit a914f1811185f5959d50f2a199420dee4d15ae74

scwx-qt/scwx-qt.cmake

@@ -93,12 +93,14 @@ set(SRC_MAP source/scwx/qt/map/alert_layer.cpp
             source/scwx/qt/map/radar_range_layer.cpp)
 set(HDR_MODEL source/scwx/qt/model/alert_model.hpp
               source/scwx/qt/model/alert_proxy_model.hpp
+              source/scwx/qt/model/imgui_context_model.hpp
               source/scwx/qt/model/radar_product_model.hpp
               source/scwx/qt/model/radar_site_model.hpp
               source/scwx/qt/model/tree_item.hpp
               source/scwx/qt/model/tree_model.hpp)
 set(SRC_MODEL source/scwx/qt/model/alert_model.cpp
               source/scwx/qt/model/alert_proxy_model.cpp
+              source/scwx/qt/model/imgui_context_model.cpp
               source/scwx/qt/model/radar_product_model.cpp
               source/scwx/qt/model/radar_site_model.cpp
               source/scwx/qt/model/tree_item.cpp
@@ -119,6 +121,8 @@ set(SRC_TYPES source/scwx/qt/types/radar_product_record.cpp
 set(HDR_UI source/scwx/qt/ui/alert_dialog.hpp
            source/scwx/qt/ui/alert_dock_widget.hpp
            source/scwx/qt/ui/flow_layout.hpp
+           source/scwx/qt/ui/imgui_debug_dialog.hpp
+           source/scwx/qt/ui/imgui_debug_widget.hpp
            source/scwx/qt/ui/level2_products_widget.hpp
            source/scwx/qt/ui/level2_settings_widget.hpp
            source/scwx/qt/ui/level3_products_widget.hpp
@@ -126,12 +130,15 @@ set(HDR_UI source/scwx/qt/ui/alert_dialog.hpp
 set(SRC_UI source/scwx/qt/ui/alert_dialog.cpp
            source/scwx/qt/ui/alert_dock_widget.cpp
            source/scwx/qt/ui/flow_layout.cpp
+           source/scwx/qt/ui/imgui_debug_dialog.cpp
+           source/scwx/qt/ui/imgui_debug_widget.cpp
            source/scwx/qt/ui/level2_products_widget.cpp
            source/scwx/qt/ui/level2_settings_widget.cpp
            source/scwx/qt/ui/level3_products_widget.cpp
            source/scwx/qt/ui/radar_site_dialog.cpp)
 set(UI_UI  source/scwx/qt/ui/alert_dialog.ui
            source/scwx/qt/ui/alert_dock_widget.ui
+           source/scwx/qt/ui/imgui_debug_dialog.ui
            source/scwx/qt/ui/radar_site_dialog.ui)
 set(HDR_UTIL source/scwx/qt/util/font.hpp
              source/scwx/qt/util/font_buffer.hpp

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

@@ -11,6 +11,7 @@
 #include <scwx/qt/model/radar_product_model.hpp>
 #include <scwx/qt/ui/alert_dock_widget.hpp>
 #include <scwx/qt/ui/flow_layout.hpp>
+#include <scwx/qt/ui/imgui_debug_dialog.hpp>
 #include <scwx/qt/ui/level2_products_widget.hpp>
 #include <scwx/qt/ui/level2_settings_widget.hpp>
 #include <scwx/qt/ui/level3_products_widget.hpp>
@@ -49,6 +50,7 @@ public:
        level2SettingsWidget_ {nullptr},
        level3ProductsWidget_ {nullptr},
        alertDockWidget_ {nullptr},
+       imGuiDebugDialog_ {nullptr},
        radarSiteDialog_ {nullptr},
        radarProductModel_ {nullptr},
        textEventManager_ {manager::TextEventManager::Instance()},
@@ -110,6 +112,7 @@ public:
    ui::Level3ProductsWidget* level3ProductsWidget_;
 
    ui::AlertDockWidget*  alertDockWidget_;
+   ui::ImGuiDebugDialog* imGuiDebugDialog_;
    ui::RadarSiteDialog*  radarSiteDialog_;
 
    std::unique_ptr<model::RadarProductModel>  radarProductModel_;
@@ -196,6 +199,9 @@ MainWindow::MainWindow(QWidget* parent) :
    ui->settingsFrame->layout()->addWidget(p->level2SettingsWidget_);
    p->level2SettingsWidget_->setVisible(false);
 
+   // ImGui Debug Dialog
+   p->imGuiDebugDialog_ = new ui::ImGuiDebugDialog(this);
+
    auto mapSettings = manager::SettingsManager::map_settings();
    for (size_t i = 0; i < p->maps_.size(); i++)
    {
@@ -323,6 +329,11 @@ void MainWindow::on_actionExit_triggered()
    close();
 }
 
+void MainWindow::on_actionImGuiDebug_triggered()
+{
+   p->imGuiDebugDialog_->show();
+}
+
 void MainWindow::on_radarSiteSelectButton_clicked()
 {
    p->radarSiteDialog_->show();

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

@@ -35,6 +35,7 @@ private slots:
    void on_actionOpenNexrad_triggered();
    void on_actionOpenTextEvent_triggered();
    void on_actionExit_triggered();
+   void on_actionImGuiDebug_triggered();
    void on_radarSiteSelectButton_clicked();
    void on_resourceTreeCollapseAllButton_clicked();
    void on_resourceTreeExpandAllButton_clicked();

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

@@ -35,7 +35,7 @@
      <x>0</x>
      <y>0</y>
      <width>1024</width>
-     <height>22</height>
+     <height>21</height>
     </rect>
    </property>
    <widget class="QMenu" name="menuFile">
@@ -67,8 +67,15 @@
     <addaction name="actionResourceExplorer"/>
     <addaction name="actionAlerts"/>
    </widget>
+   <widget class="QMenu" name="menuDebug">
+    <property name="title">
+     <string>&amp;Debug</string>
+    </property>
+    <addaction name="actionImGuiDebug"/>
+   </widget>
    <addaction name="menuFile"/>
    <addaction name="menuView"/>
+   <addaction name="menuDebug"/>
    <addaction name="menuHelp"/>
   </widget>
   <widget class="QStatusBar" name="statusbar"/>
@@ -342,6 +349,11 @@
     <string>&amp;Alerts</string>
    </property>
   </action>
+  <action name="actionImGuiDebug">
+   <property name="text">
+    <string>&amp;ImGui Debug</string>
+   </property>
+  </action>
  </widget>
  <resources>
   <include location="../../../../scwx-qt.qrc"/>

scwx-qt/source/scwx/qt/manager/resource_manager.cpp

@@ -4,11 +4,6 @@
 #include <scwx/qt/util/texture_atlas.hpp>
 #include <scwx/util/logger.hpp>
 
-#include <backends/imgui_impl_opengl3.h>
-#include <imgui.h>
-#include <QOffscreenSurface>
-#include <QOpenGLContext>
-
 namespace scwx
 {
 namespace qt
@@ -17,45 +12,21 @@ namespace manager
 {
 namespace ResourceManager
 {
-static const std::string logPrefix_ = "scwx::qt::manager::ResourceManager";
+static const std::string logPrefix_ = "scwx::qt::manager::resource_manager";
 static const auto        logger_    = scwx::util::Logger::Create(logPrefix_);
 
-static void InitializeImGui();
 static void LoadFonts();
 static void LoadTextures();
-static void ShutdownImGui();
-
-static std::unique_ptr<QOffscreenSurface> surface_ {};
 
 void Initialize()
 {
    config::CountyDatabase::Initialize();
 
-   InitializeImGui();
    LoadFonts();
    LoadTextures();
 }
 
-void Shutdown()
-{
-   ShutdownImGui();
-}
-
-static void InitializeImGui()
-{
-   // Create OpenGL Offscreen Surface
-   surface_ = std::make_unique<QOffscreenSurface>();
-   surface_->create();
-   if (!QOpenGLContext::globalShareContext()->makeCurrent(surface_.get()))
-   {
-      logger_->warn("Failed to initialize offscreen surface");
-   }
-
-   // Initialize ImGui
-   ImGui::CreateContext();
-   ImGui_ImplOpenGL3_Init();
-   QOpenGLContext::globalShareContext()->doneCurrent();
-}
+void Shutdown() {}
 
 static void LoadFonts()
 {
@@ -73,14 +44,6 @@ static void LoadTextures()
    textureAtlas.BuildAtlas(8, 8);
 }
 
-static void ShutdownImGui()
-{
-   QOpenGLContext::globalShareContext()->makeCurrent(surface_.get());
-   ImGui_ImplOpenGL3_Shutdown();
-   ImGui::DestroyContext();
-   QOpenGLContext::globalShareContext()->doneCurrent();
-}
-
 } // namespace ResourceManager
 } // namespace manager
 } // namespace qt

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

@@ -8,12 +8,14 @@
 #include <scwx/qt/map/overlay_layer.hpp>
 #include <scwx/qt/map/radar_product_layer.hpp>
 #include <scwx/qt/map/radar_range_layer.hpp>
+#include <scwx/qt/model/imgui_context_model.hpp>
 #include <scwx/qt/view/radar_product_view_factory.hpp>
 #include <scwx/util/logger.hpp>
 #include <scwx/util/threads.hpp>
 #include <scwx/util/time.hpp>
 
 #include <backends/imgui_impl_opengl3.h>
+#include <backends/imgui_impl_qt.hpp>
 #include <imgui.h>
 #include <QApplication>
 #include <QColor>
@@ -60,6 +62,7 @@ public:
        settings_(settings),
        map_(),
        layerList_ {},
+       imGuiRendererInitialized_ {false},
        radarProductManager_ {nullptr},
        radarProductLayer_ {nullptr},
        alertLayer_ {std::make_shared<AlertLayer>(context_)},
@@ -79,8 +82,33 @@ public:
    {
       SetRadarSite(scwx::qt::manager::SettingsManager::general_settings()
                       ->default_radar_site());
+
+      // Create ImGui Context
+      static size_t currentMapId_ {0u};
+      imGuiContextName_ = std::format("Map {}", ++currentMapId_);
+      imGuiContext_ =
+         model::ImGuiContextModel::Instance().CreateContext(imGuiContextName_);
+
+      // Initialize ImGui Qt backend
+      ImGui_ImplQt_Init();
+      ImGui_ImplQt_RegisterWidget(widget_);
+   }
+
+   ~MapWidgetImpl()
+   {
+      // Set ImGui Context
+      ImGui::SetCurrentContext(imGuiContext_);
+
+      // Shutdown ImGui Context
+      if (imGuiRendererInitialized_)
+      {
+         ImGui_ImplOpenGL3_Shutdown();
+      }
+      ImGui_ImplQt_Shutdown();
+
+      // Destroy ImGui Context
+      model::ImGuiContextModel::Instance().DestroyContext(imGuiContextName_);
    }
-   ~MapWidgetImpl() = default;
 
    void AddLayer(const std::string&            id,
                  std::shared_ptr<GenericLayer> layer,
@@ -103,6 +131,10 @@ public:
    std::shared_ptr<QMapLibreGL::Map> map_;
    std::list<std::string>            layerList_;
 
+   ImGuiContext* imGuiContext_;
+   std::string   imGuiContextName_;
+   bool          imGuiRendererInitialized_;
+
    std::shared_ptr<manager::RadarProductManager> radarProductManager_;
 
    std::shared_ptr<common::ColorTable> colorTable_;
@@ -136,6 +168,8 @@ MapWidget::MapWidget(const QMapLibreGL::Settings& settings) :
     p(std::make_unique<MapWidgetImpl>(this, settings))
 {
    setFocusPolicy(Qt::StrongFocus);
+
+   ImGui_ImplQt_RegisterWidget(this);
 }
 
 MapWidget::~MapWidget()
@@ -644,6 +678,11 @@ void MapWidget::initializeGL()
    makeCurrent();
    p->context_->gl().initializeOpenGLFunctions();
 
+   // Initialize ImGui OpenGL3 backend
+   ImGui::SetCurrentContext(p->imGuiContext_);
+   ImGui_ImplOpenGL3_Init();
+   p->imGuiRendererInitialized_ = true;
+
    p->map_.reset(
       new QMapLibreGL::Map(nullptr, p->settings_, size(), pixelRatio()));
    p->context_->set_map(p->map_);
@@ -686,10 +725,10 @@ void MapWidget::paintGL()
    p->frameDraws_++;
 
    // Setup ImGui Frame
-   ImGui::GetIO().DisplaySize = {static_cast<float>(size().width()),
-                                 static_cast<float>(size().height())};
+   ImGui::SetCurrentContext(p->imGuiContext_);
 
    // Start ImGui Frame
+   ImGui_ImplQt_NewFrame(this);
    ImGui_ImplOpenGL3_NewFrame();
    ImGui::NewFrame();
 

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

@@ -0,0 +1,143 @@
+#include <scwx/qt/model/imgui_context_model.hpp>
+#include <scwx/qt/types/qt_types.hpp>
+#include <scwx/util/logger.hpp>
+
+#include <imgui.h>
+
+namespace scwx
+{
+namespace qt
+{
+namespace model
+{
+
+static const std::string logPrefix_ = "scwx::qt::model::imgui_context_model";
+static const auto        logger_    = scwx::util::Logger::Create(logPrefix_);
+
+class ImGuiContextModelImpl
+{
+public:
+   explicit ImGuiContextModelImpl() {}
+
+   ~ImGuiContextModelImpl() = default;
+
+   std::vector<ImGuiContextInfo> contexts_ {};
+};
+
+ImGuiContextModel::ImGuiContextModel() :
+    QAbstractListModel(nullptr), p {std::make_unique<ImGuiContextModelImpl>()}
+{
+}
+
+ImGuiContextModel::~ImGuiContextModel() {}
+
+int ImGuiContextModel::rowCount(const QModelIndex& parent) const
+{
+   return parent.isValid() ? 0 : static_cast<int>(p->contexts_.size());
+}
+
+QVariant ImGuiContextModel::data(const QModelIndex& index, int role) const
+{
+   if (!index.isValid())
+   {
+      return {};
+   }
+
+   const int row = index.row();
+   if (row >= p->contexts_.size() || row < 0)
+   {
+      return {};
+   }
+
+   switch (role)
+   {
+   case Qt::ItemDataRole::DisplayRole:
+      return QString("%1: %2")
+         .arg(p->contexts_[row].id_)
+         .arg(p->contexts_[row].name_.c_str());
+
+   case qt::types::ItemDataRole::RawDataRole:
+      QVariant variant {};
+      variant.setValue(p->contexts_[row]);
+      return variant;
+   }
+
+   return {};
+}
+
+QModelIndex ImGuiContextModel::IndexOf(const std::string& contextName) const
+{
+   // Find context from registry
+   auto it =
+      std::find_if(p->contexts_.begin(),
+                   p->contexts_.end(),
+                   [&](auto& info) { return info.name_ == contextName; });
+
+   if (it != p->contexts_.end())
+   {
+      const int row = it - p->contexts_.begin();
+      return createIndex(row, 0, nullptr);
+   }
+
+   return {};
+}
+
+ImGuiContext* ImGuiContextModel::CreateContext(const std::string& name)
+{
+   static size_t nextId_ {0};
+
+   ImGuiContext* context = ImGui::CreateContext();
+   ImGui::SetCurrentContext(context);
+
+   // ImGui Configuration
+   auto& io = ImGui::GetIO();
+
+   // Disable automatic configuration loading/saving
+   io.IniFilename = nullptr;
+
+   // Style
+   auto& style         = ImGui::GetStyle();
+   style.WindowMinSize = {10.0f, 10.0f};
+
+   // Register context
+   const int nextPosition = static_cast<int>(p->contexts_.size());
+   beginInsertRows(QModelIndex(), nextPosition, nextPosition);
+   p->contexts_.emplace_back(ImGuiContextInfo {nextId_++, name, context});
+   endInsertRows();
+
+   return context;
+}
+
+void ImGuiContextModel::DestroyContext(const std::string& name)
+{
+   // Find context from registry
+   auto it = std::find_if(p->contexts_.begin(),
+                          p->contexts_.end(),
+                          [&](auto& info) { return info.name_ == name; });
+
+   if (it != p->contexts_.end())
+   {
+      const int position = it - p->contexts_.begin();
+
+      // Destroy context
+      ImGui::SetCurrentContext(it->context_);
+      ImGui::DestroyContext();
+
+      // Erase context from index
+      beginRemoveRows(QModelIndex(), position, position);
+      p->contexts_.erase(it);
+      endRemoveRows();
+   }
+}
+
+ImGuiContextModel& ImGuiContextModel::Instance()
+{
+   static ImGuiContextModel instance_ {};
+   return instance_;
+}
+
+bool ImGuiContextInfo::operator==(const ImGuiContextInfo& o) const = default;
+
+} // namespace model
+} // namespace qt
+} // namespace scwx

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

@@ -0,0 +1,60 @@
+#pragma once
+
+#include <memory>
+#include <string>
+
+#include <QAbstractListModel>
+
+struct ImGuiContext;
+
+namespace scwx
+{
+namespace qt
+{
+namespace model
+{
+
+class ImGuiContextModelImpl;
+
+struct ImGuiContextInfo
+{
+   size_t        id_ {};
+   std::string   name_ {};
+   ImGuiContext* context_ {};
+
+   bool operator==(const ImGuiContextInfo& o) const;
+};
+
+class ImGuiContextModel : public QAbstractListModel
+{
+private:
+   Q_OBJECT
+   Q_DISABLE_COPY(ImGuiContextModel)
+
+public:
+   explicit ImGuiContextModel();
+   ~ImGuiContextModel();
+
+   int rowCount(const QModelIndex& parent = QModelIndex()) const override;
+
+   QVariant data(const QModelIndex& index,
+                 int                role = Qt::DisplayRole) const override;
+
+   QModelIndex IndexOf(const std::string& contextName) const;
+
+   ImGuiContext* CreateContext(const std::string& name);
+   void          DestroyContext(const std::string& name);
+
+   static ImGuiContextModel& Instance();
+
+signals:
+   void ContextsUpdated();
+
+private:
+   friend class ImGuiContextModelImpl;
+   std::unique_ptr<ImGuiContextModelImpl> p;
+};
+
+} // namespace model
+} // namespace qt
+} // namespace scwx

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

@@ -12,7 +12,8 @@ namespace types
 enum ItemDataRole
 {
    SortRole = Qt::UserRole,
-   TimePointRole
+   TimePointRole,
+   RawDataRole
 };
 
 } // namespace types

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

@@ -0,0 +1,69 @@
+#include "imgui_debug_dialog.hpp"
+#include "ui_imgui_debug_dialog.h"
+
+#include <scwx/qt/model/imgui_context_model.hpp>
+#include <scwx/qt/types/qt_types.hpp>
+#include <scwx/qt/ui/imgui_debug_widget.hpp>
+
+namespace scwx
+{
+namespace qt
+{
+namespace ui
+{
+
+static const std::string logPrefix_ = "scwx::qt::ui::imgui_debug_dialog";
+
+class ImGuiDebugDialogImpl
+{
+public:
+   explicit ImGuiDebugDialogImpl() : imGuiDebugWidget_ {nullptr} {}
+   ~ImGuiDebugDialogImpl() = default;
+
+   ImGuiDebugWidget* imGuiDebugWidget_;
+};
+
+ImGuiDebugDialog::ImGuiDebugDialog(QWidget* parent) :
+    QDialog(parent),
+    p {std::make_unique<ImGuiDebugDialogImpl>()},
+    ui(new Ui::ImGuiDebugDialog)
+{
+   ui->setupUi(this);
+
+   // ImGui Debug Widget
+   p->imGuiDebugWidget_ = new ImGuiDebugWidget(this);
+   p->imGuiDebugWidget_->setSizePolicy(QSizePolicy::Policy::Expanding,
+                                       QSizePolicy::Policy::Expanding);
+   ui->verticalLayout->insertWidget(0, p->imGuiDebugWidget_);
+
+   // Context Combo Box
+   auto& contextModel = model::ImGuiContextModel::Instance();
+   auto  index = contextModel.IndexOf(p->imGuiDebugWidget_->context_name());
+   ui->contextComboBox->setModel(&contextModel);
+   ui->contextComboBox->setCurrentIndex(index.row());
+
+   connect(
+      ui->contextComboBox,
+      &QComboBox::currentIndexChanged,
+      [=](int row)
+      {
+         auto& contextModel = model::ImGuiContextModel::Instance();
+         auto  index        = contextModel.index(row, 0);
+         if (index.isValid())
+         {
+            QVariant data = contextModel.data(index, qt::types::RawDataRole);
+            auto     contextInfo = data.value<model::ImGuiContextInfo>();
+
+            p->imGuiDebugWidget_->set_current_context(contextInfo.context_);
+         }
+      });
+}
+
+ImGuiDebugDialog::~ImGuiDebugDialog()
+{
+   delete ui;
+}
+
+} // namespace ui
+} // namespace qt
+} // namespace scwx

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

@@ -0,0 +1,36 @@
+#pragma once
+
+#include <QDialog>
+
+namespace Ui
+{
+class ImGuiDebugDialog;
+}
+
+namespace scwx
+{
+namespace qt
+{
+namespace ui
+{
+
+class ImGuiDebugDialogImpl;
+
+class ImGuiDebugDialog : public QDialog
+{
+private:
+   Q_DISABLE_COPY(ImGuiDebugDialog)
+
+public:
+   explicit ImGuiDebugDialog(QWidget* parent = nullptr);
+   ~ImGuiDebugDialog();
+
+private:
+   friend class ImGuiDebugDialogImpl;
+   std::unique_ptr<ImGuiDebugDialogImpl> p;
+   Ui::ImGuiDebugDialog*                 ui;
+};
+
+} // namespace ui
+} // namespace qt
+} // namespace scwx

scwx-qt/source/scwx/qt/ui/imgui_debug_dialog.ui

@@ -0,0 +1,104 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>ImGuiDebugDialog</class>
+ <widget class="QDialog" name="ImGuiDebugDialog">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>592</width>
+    <height>754</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>ImGui Debug</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
+    <widget class="QFrame" name="bottomFrame">
+     <property name="frameShape">
+      <enum>QFrame::StyledPanel</enum>
+     </property>
+     <property name="frameShadow">
+      <enum>QFrame::Raised</enum>
+     </property>
+     <layout class="QHBoxLayout" name="horizontalLayout">
+      <property name="leftMargin">
+       <number>0</number>
+      </property>
+      <property name="topMargin">
+       <number>0</number>
+      </property>
+      <property name="rightMargin">
+       <number>0</number>
+      </property>
+      <property name="bottomMargin">
+       <number>0</number>
+      </property>
+      <item>
+       <widget class="QLabel" name="contextLabel">
+        <property name="text">
+         <string>Context</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QComboBox" name="contextComboBox"/>
+      </item>
+      <item>
+       <widget class="QDialogButtonBox" name="buttonBox">
+        <property name="sizePolicy">
+         <sizepolicy hsizetype="Expanding" vsizetype="Fixed">
+          <horstretch>0</horstretch>
+          <verstretch>0</verstretch>
+         </sizepolicy>
+        </property>
+        <property name="orientation">
+         <enum>Qt::Horizontal</enum>
+        </property>
+        <property name="standardButtons">
+         <set>QDialogButtonBox::Close</set>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>accepted()</signal>
+   <receiver>ImGuiDebugDialog</receiver>
+   <slot>accept()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>248</x>
+     <y>254</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>157</x>
+     <y>274</y>
+    </hint>
+   </hints>
+  </connection>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>rejected()</signal>
+   <receiver>ImGuiDebugDialog</receiver>
+   <slot>reject()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>316</x>
+     <y>260</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>286</x>
+     <y>274</y>
+    </hint>
+   </hints>
+  </connection>
+ </connections>
+</ui>

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

@@ -0,0 +1,137 @@
+#include <scwx/qt/ui/imgui_debug_widget.hpp>
+#include <scwx/qt/model/imgui_context_model.hpp>
+
+#include <set>
+
+#include <imgui.h>
+#include <backends/imgui_impl_opengl3.h>
+#include <backends/imgui_impl_qt.hpp>
+
+namespace scwx
+{
+namespace qt
+{
+namespace ui
+{
+
+static const std::string logPrefix_ = "scwx::qt::ui::imgui_debug_widget";
+
+class ImGuiDebugWidgetImpl
+{
+public:
+   explicit ImGuiDebugWidgetImpl(ImGuiDebugWidget* self) : self_ {self}
+   {
+      // Create ImGui Context
+      static size_t currentIndex_ {0u};
+      contextName_ = std::format("ImGui Debug {}", ++currentIndex_);
+      context_ =
+         model::ImGuiContextModel::Instance().CreateContext(contextName_);
+      currentContext_ = context_;
+
+      // Initialize ImGui Qt backend
+      ImGui_ImplQt_Init();
+      ImGui_ImplQt_RegisterWidget(self_);
+   }
+
+   ~ImGuiDebugWidgetImpl()
+   {
+      // Set ImGui Context
+      ImGui::SetCurrentContext(context_);
+
+      // Shutdown ImGui Context
+      if (imGuiRendererInitialized_)
+      {
+         ImGui_ImplOpenGL3_Shutdown();
+      }
+      ImGui_ImplQt_Shutdown();
+
+      // Destroy ImGui Context
+      model::ImGuiContextModel::Instance().DestroyContext(contextName_);
+   }
+
+   ImGuiDebugWidget* self_;
+   ImGuiContext*     context_;
+   std::string       contextName_;
+
+   ImGuiContext* currentContext_;
+
+   std::set<ImGuiContext*> renderedSet_ {};
+   bool                    imGuiRendererInitialized_ {false};
+};
+
+ImGuiDebugWidget::ImGuiDebugWidget(QWidget* parent) :
+    QOpenGLWidget(parent), p {std::make_unique<ImGuiDebugWidgetImpl>(this)}
+{
+   // Accept focus for keyboard events
+   setFocusPolicy(Qt::StrongFocus);
+}
+
+ImGuiDebugWidget::~ImGuiDebugWidget() {}
+
+std::string ImGuiDebugWidget::context_name() const
+{
+   return p->contextName_;
+}
+
+void ImGuiDebugWidget::set_current_context(ImGuiContext* context)
+{
+   if (context == p->currentContext_)
+   {
+      return;
+   }
+
+   // Unregister widget with current context
+   ImGui::SetCurrentContext(p->currentContext_);
+   ImGui_ImplQt_UnregisterWidget(this);
+
+   p->currentContext_ = context;
+
+   // Register widget with new context
+   ImGui::SetCurrentContext(context);
+   ImGui_ImplQt_RegisterWidget(this);
+
+   // Queue an update
+   update();
+}
+
+void ImGuiDebugWidget::initializeGL()
+{
+   makeCurrent();
+
+   // Initialize ImGui OpenGL3 backend
+   ImGui::SetCurrentContext(p->context_);
+   ImGui_ImplOpenGL3_Init();
+   p->imGuiRendererInitialized_ = true;
+}
+
+void ImGuiDebugWidget::paintGL()
+{
+   ImGui::SetCurrentContext(p->currentContext_);
+
+   ImGui_ImplQt_NewFrame(this);
+   ImGui_ImplOpenGL3_NewFrame();
+
+   ImGui::NewFrame();
+
+   if (!p->renderedSet_.contains(p->currentContext_))
+   {
+      // Set initial position of demo window
+      ImGui::SetNextWindowPos(ImVec2 {width() / 2.0f, height() / 2.0f},
+                              ImGuiCond_FirstUseEver,
+                              ImVec2 {0.5f, 0.5f});
+      ImGui::Begin("Dear ImGui Demo");
+      ImGui::End();
+
+      p->renderedSet_.insert(p->currentContext_);
+      update();
+   }
+
+   ImGui::ShowDemoWindow();
+
+   ImGui::Render();
+   ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
+}
+
+} // namespace ui
+} // namespace qt
+} // namespace scwx

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

@@ -0,0 +1,44 @@
+#pragma once
+
+#include <QOpenGLWidget>
+
+struct ImGuiContext;
+
+namespace Ui
+{
+class ImGuiDebugWidget;
+}
+
+namespace scwx
+{
+namespace qt
+{
+namespace ui
+{
+
+class ImGuiDebugWidgetImpl;
+
+class ImGuiDebugWidget : public QOpenGLWidget
+{
+private:
+   Q_DISABLE_COPY(ImGuiDebugWidget)
+
+public:
+   explicit ImGuiDebugWidget(QWidget* parent = nullptr);
+   ~ImGuiDebugWidget();
+
+   std::string context_name() const;
+
+   void set_current_context(ImGuiContext* context);
+
+   void initializeGL() override;
+   void paintGL() override;
+
+private:
+   friend class ImGuiDebugWidgetImpl;
+   std::unique_ptr<ImGuiDebugWidgetImpl> p;
+};
+
+} // namespace ui
+} // namespace qt
+} // namespace scwx

test/source/scwx/qt/manager/imgui_manager.test.cpp

@@ -0,0 +1,44 @@
+#include <scwx/qt/manager/imgui_manager.hpp>
+
+#include <gtest/gtest.h>
+
+namespace scwx
+{
+namespace qt
+{
+namespace manager
+{
+
+TEST(ImGuiManagerTest, State)
+{
+   auto& ImGuiManager = ImGuiManager::Instance();
+
+   ImGuiManager.CreateContext("Context One");
+   ImGuiManager.CreateContext("Context Two");
+   ImGuiManager.CreateContext("Context Three");
+   
+   auto contexts = ImGuiManager.contexts();
+
+   ASSERT_EQ(contexts.size(), 3u);
+   EXPECT_EQ(contexts.at(0).id_, 0u);
+   EXPECT_EQ(contexts.at(1).id_, 1u);
+   EXPECT_EQ(contexts.at(2).id_, 2u);
+   EXPECT_EQ(contexts.at(0).name_, "Context One");
+   EXPECT_EQ(contexts.at(1).name_, "Context Two");
+   EXPECT_EQ(contexts.at(2).name_, "Context Three");
+   EXPECT_NE(contexts.at(0).context_, nullptr);
+   EXPECT_NE(contexts.at(1).context_, nullptr);
+   EXPECT_NE(contexts.at(2).context_, nullptr);
+
+   ImGuiManager.DestroyContext("Context Two");
+
+   auto contexts2 = ImGuiManager.contexts();
+
+   ASSERT_EQ(contexts2.size(), 2u);
+   EXPECT_EQ(contexts2.at(0), contexts.at(0));
+   EXPECT_EQ(contexts2.at(1), contexts.at(2));
+}
+
+} // namespace manager
+} // namespace qt
+} // namespace scwx

test/test.cmake

@@ -21,7 +21,8 @@ set(SRC_PROVIDER_TESTS source/scwx/provider/aws_level2_data_provider.test.cpp
                        source/scwx/provider/warnings_provider.test.cpp)
 set(SRC_QT_CONFIG_TESTS source/scwx/qt/config/county_database.test.cpp
                         source/scwx/qt/config/radar_site.test.cpp)
-set(SRC_QT_MANAGER_TESTS source/scwx/qt/manager/settings_manager.test.cpp)
+set(SRC_QT_MANAGER_TESTS source/scwx/qt/manager/imgui_manager.test.cpp
+                         source/scwx/qt/manager/settings_manager.test.cpp)
 set(SRC_UTIL_TESTS source/scwx/util/float.test.cpp
                    source/scwx/util/rangebuf.test.cpp
                    source/scwx/util/streams.test.cpp