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src/ui/Application.h

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+#pragma once
+
+#include "ImGuiContext.h"
+#include "IconManager.h"
+#include "LayerPanel.h"
+#include "SceneHierarchyPanel.h"
+#include "ViewportPanel.h"
+#include "PropertyPanel.h"
+#include "../core/UsdStageManager.h"
+#include "../core/LayerManager.h"
+#include "../core/PropertyManager.h"
+#include "../core/CommandHistory.h"
+#include <memory>
+#include <string>
+
+namespace UsdLayerManager {
+
+class Application {
+public:
+    Application();
+    ~Application();
+    
+    bool Initialize(const std::string& windowTitle = "USD Layer Manager", int width = 1280, int height = 720);
+    void Run();
+    void Shutdown();
+    
+private:
+    void Update();
+    void RenderUI();
+    void RenderMenuBar();
+    void RenderStageInfo();
+    void RefreshManagers();
+    
+    // File operations
+    void OpenUsdFile();
+    void CreateNewUsdFile();       // creates fresh in-memory stage
+    void SaveUsdFile();
+    void SaveUsdFileAs();
+    void CloseUsdFile();           // closes file-backed stage, falls back to default stage
+
+    // Stage editing operations (also exposed via Stage menu)
+    void AddReferenceToStage();
+    void CreatePrimOnStage(const std::string& typeName);
+    
+    std::unique_ptr<ImGuiContext> m_imguiContext;
+    std::unique_ptr<IconManager> m_iconManager;
+    std::unique_ptr<UsdStageManager> m_stageManager;
+    std::unique_ptr<LayerManager> m_layerManager;
+    std::unique_ptr<PropertyManager> m_propertyManager;
+    CommandHistory m_commandHistory;
+    std::unique_ptr<LayerPanel> m_layerPanel;
+    std::unique_ptr<SceneHierarchyPanel> m_sceneHierarchyPanel;
+    std::unique_ptr<ViewportPanel> m_viewportPanel;
+    std::unique_ptr<PropertyPanel> m_propertyPanel;
+    bool m_showDemoWindow;
+    bool m_showStageInfo;
+    bool m_running;
+};
+
+} // namespace UsdLayerManager