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src/core/PropertyManager.h

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+#pragma once
+
+#include <pxr/usd/usd/stage.h>
+#include <pxr/usd/usd/attribute.h>
+#include <pxr/usd/usd/editContext.h>
+#include <pxr/usd/sdf/layer.h>
+#include <string>
+#include <vector>
+#include <memory>
+#include <variant>
+
+PXR_NAMESPACE_USING_DIRECTIVE
+
+namespace UsdLayerManager {
+
+using PropertyValue = std::variant<
+    bool, int, float, double, std::string,
+    pxr::GfVec3f, pxr::GfVec3d
+>;
+
+struct PropertyInfo {
+    std::string name;
+    std::string displayName;
+    std::string typeName;
+    pxr::UsdAttribute attribute;
+    bool hasValue;
+    PropertyValue value;
+    std::string layerStack;
+};
+
+class PropertyManager {
+public:
+    PropertyManager();
+    ~PropertyManager();
+    
+    void SetStage(UsdStageRefPtr stage);
+    void SetCurrentLayer(const SdfLayerHandle& layer);
+    SdfLayerHandle GetCurrentLayer() const { return m_currentLayer; }
+    
+    // Prim properties
+    std::vector<PropertyInfo> GetPrimProperties(const std::string& primPath);
+    std::vector<PropertyInfo> GetPrimProperties(const UsdPrim& prim);
+    
+    // Property editing
+    bool SetPropertyValue(const std::string& primPath, const std::string& propName, 
+                          const PropertyValue& value);
+    bool SetPropertyValueInLayer(const std::string& primPath, const std::string& propName,
+                                 const PropertyValue& value, const SdfLayerHandle& layer);
+    
+    // Property info
+    std::string GetPropertyLayerStack(const UsdAttribute& attr);
+    
+    // Prim hierarchy
+    std::vector<std::string> GetPrimPaths();
+    UsdPrim GetPrim(const std::string& path);
+    
+private:
+    void CollectProperties(const UsdPrim& prim, std::vector<PropertyInfo>& props);
+    PropertyValue ExtractValue(const UsdAttribute& attr);
+    bool ApplyValue(const UsdAttribute& attr, const PropertyValue& value);
+    
+    UsdStageRefPtr m_stage;
+    SdfLayerHandle m_currentLayer;
+};
+
+} // namespace UsdLayerManager