Enable ImGui context selection

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

@@ -1,4 +1,5 @@
 #include <scwx/qt/model/imgui_context_model.hpp>
+#include <scwx/qt/types/qt_types.hpp>
 #include <scwx/util/logger.hpp>
 
 #include <imgui.h>
@@ -54,6 +55,28 @@ QVariant ImGuiContextModel::data(const QModelIndex& index, int role) const
       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 {};
@@ -107,11 +130,6 @@ void ImGuiContextModel::DestroyContext(const std::string& name)
    }
 }
 
-std::vector<ImGuiContextInfo> ImGuiContextModel::contexts() const
-{
-   return p->contexts_;
-}
-
 ImGuiContextModel& ImGuiContextModel::Instance()
 {
    static ImGuiContextModel instance_ {};

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

@@ -40,11 +40,11 @@ public:
    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);
 
-   std::vector<ImGuiContextInfo> contexts() const;
-
    static ImGuiContextModel& Instance();
 
 signals:

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

@@ -2,6 +2,7 @@
 #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
@@ -36,7 +37,26 @@ ImGuiDebugDialog::ImGuiDebugDialog(QWidget* parent) :
    ui->verticalLayout->insertWidget(0, p->imGuiDebugWidget_);
 
    // Context Combo Box
-   ui->contextComboBox->setModel(&model::ImGuiContextModel::Instance());
+   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()

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

@@ -1,6 +1,8 @@
 #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>
@@ -24,6 +26,7 @@ public:
       contextName_ = std::format("ImGui Debug {}", ++currentIndex_);
       context_ =
          model::ImGuiContextModel::Instance().CreateContext(contextName_);
+      currentContext_ = context_;
 
       // Initialize ImGui Qt backend
       ImGui_ImplQt_Init();
@@ -50,7 +53,9 @@ public:
    ImGuiContext*     context_;
    std::string       contextName_;
 
-   bool firstRender_ {true};
+   ImGuiContext* currentContext_;
+
+   std::set<ImGuiContext*> renderedSet_ {};
    bool                    imGuiRendererInitialized_ {false};
 };
 
@@ -63,6 +68,17 @@ ImGuiDebugWidget::ImGuiDebugWidget(QWidget* parent) :
 
 ImGuiDebugWidget::~ImGuiDebugWidget() {}
 
+std::string ImGuiDebugWidget::context_name() const
+{
+   return p->contextName_;
+}
+
+void ImGuiDebugWidget::set_current_context(ImGuiContext* context)
+{
+   p->currentContext_ = context;
+   update();
+}
+
 void ImGuiDebugWidget::initializeGL()
 {
    makeCurrent();
@@ -75,14 +91,14 @@ void ImGuiDebugWidget::initializeGL()
 
 void ImGuiDebugWidget::paintGL()
 {
-   ImGui::SetCurrentContext(p->context_);
+   ImGui::SetCurrentContext(p->currentContext_);
 
    ImGui_ImplQt_NewFrame(this);
    ImGui_ImplOpenGL3_NewFrame();
 
    ImGui::NewFrame();
 
-   if (p->firstRender_)
+   if (!p->renderedSet_.contains(p->currentContext_))
    {
       // Set initial position of demo window
       ImGui::SetNextWindowPos(ImVec2 {width() / 2.0f, height() / 2.0f},
@@ -91,7 +107,8 @@ void ImGuiDebugWidget::paintGL()
       ImGui::Begin("Dear ImGui Demo");
       ImGui::End();
 
-      p->firstRender_ = false;
+      p->renderedSet_.insert(p->currentContext_);
+      update();
    }
 
    ImGui::ShowDemoWindow();

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

@@ -2,6 +2,8 @@
 
 #include <QOpenGLWidget>
 
+struct ImGuiContext;
+
 namespace Ui
 {
 class ImGuiDebugWidget;
@@ -25,6 +27,10 @@ public:
    explicit ImGuiDebugWidget(QWidget* parent = nullptr);
    ~ImGuiDebugWidget();
 
+   std::string context_name() const;
+
+   void set_current_context(ImGuiContext* context);
+
    void initializeGL() override;
    void paintGL() override;