attach vtk context to gcompose

src/Core/CMakeLists.txt

@@ -10,6 +10,7 @@ set(HEADERS
     Macros.h 
     Mpl.h 
     Object.h 
+    ObjectFactory.h
     ObjectsContext.h
     Options.h 
     Serializable.h 
@@ -27,6 +28,7 @@ set(SOURCES
     Archives.cpp 
     Debug.cpp 
     Object.cpp 
+    ObjectFactory.cpp
     ObjectsContext.cpp
     Options.cpp 
     Serializable.cpp 

src/Core/Object.cpp

@@ -56,7 +56,8 @@ public:
     GenericMFPtr sloptr;
     std::string slostr;
   };
-
+  
+  std::string m_InstanceName;
   Vector<Signal> sigv;
   Vector<Slot> slov;
 };
@@ -147,6 +148,15 @@ GenericMFPtr *Object::findSlotImpl(const char *name) const {
 
 void Object::Updated() { ULIB_SIGNAL_EMIT(Object::Updated); }
 
+const std::string& Object::GetInstanceName() const {
+  return d->m_InstanceName;
+}
+
+void Object::SetInstanceName(const std::string& name) {
+  d->m_InstanceName = name;
+  this->Updated();
+}
+
 // std::ostream &
 // operator << (std::ostream &os, uLib::Object &ob)
 // {

src/Core/Object.h

@@ -27,6 +27,7 @@
 #define U_CORE_OBJECT_H
 
 #include <iostream>
+#include <string>
 
 // WARNING: COPILE ERROR if this goes after mpl/vector //
 // #include "Core/Vector.h"
@@ -74,6 +75,10 @@ public:
   Object(const Object &copy);
   ~Object();
 
+  virtual const char * GetClassName() const { return "Object"; }
+
+  const std::string& GetInstanceName() const;
+  void SetInstanceName(const std::string& name);
   ////////////////////////////////////////////////////////////////////////////
   // PARAMETERS //
 

src/Core/ObjectFactory.cpp

@@ -0,0 +1,32 @@
+#include "ObjectFactory.h"
+
+namespace uLib {
+
+ObjectFactory& ObjectFactory::Instance() {
+    static ObjectFactory instance;
+    return instance;
+}
+
+void ObjectFactory::Register(const std::string& className, FactoryFunction func) {
+    if (m_factoryMap.find(className) == m_factoryMap.end()) {
+        m_factoryMap[className] = func;
+    }
+}
+
+Object* ObjectFactory::Create(const std::string& className) {
+    auto it = m_factoryMap.find(className);
+    if (it != m_factoryMap.end()) {
+        return (it->second)();
+    }
+    return nullptr;
+}
+
+std::vector<std::string> ObjectFactory::GetRegisteredClasses() const {
+    std::vector<std::string> classes;
+    for (auto const& [name, func] : m_factoryMap) {
+        classes.push_back(name);
+    }
+    return classes;
+}
+
+} // namespace uLib

src/Core/ObjectFactory.h

@@ -0,0 +1,68 @@
+#ifndef U_CORE_OBJECTFACTORY_H
+#define U_CORE_OBJECTFACTORY_H
+
+#include <string>
+#include <map>
+#include <vector>
+#include <functional>
+#include "Core/Object.h"
+
+namespace uLib {
+
+/**
+ * @brief Singleton factory for dynamic Object instantiation based on class name.
+ */
+class ObjectFactory {
+public:
+    typedef std::function<Object*()> FactoryFunction;
+
+    /** @brief Get the singleton instance. */
+    static ObjectFactory& Instance();
+
+    /** @brief Register a factory function for a given class name. */
+    void Register(const std::string& className, FactoryFunction func);
+
+    /** @brief Create a new instance of the specified class. */
+    Object* Create(const std::string& className);
+
+    /** @brief Get the names of all registered classes. */
+    std::vector<std::string> GetRegisteredClasses() const;
+
+private:
+    ObjectFactory() = default;
+    ~ObjectFactory() = default;
+
+    // Prevent copy and assignment
+    ObjectFactory(const ObjectFactory&) = delete;
+    ObjectFactory& operator=(const ObjectFactory&) = delete;
+
+    std::map<std::string, FactoryFunction> m_factoryMap;
+};
+
+/**
+ * @brief Helper class to statically register a factory function.
+ */
+template <typename T>
+class ObjectRegistrar {
+public:
+    ObjectRegistrar(const std::string& className) {
+        ObjectFactory::Instance().Register(className, []() -> Object* { return new T(); });
+    }
+};
+
+#define ULIB_REG_CONCAT_IMPL(a, b) a##b
+#define ULIB_REG_CONCAT(a, b) ULIB_REG_CONCAT_IMPL(a, b)
+
+/**
+ * @brief Macro to register a class to the factory.
+ * Put this in the .cpp file of the class.
+ */
+#define ULIB_REGISTER_OBJECT(className) \
+    static uLib::ObjectRegistrar<className> ULIB_REG_CONCAT(g_ObjectRegistrar_, __LINE__)(#className);
+
+#define ULIB_REGISTER_OBJECT_NAME(className, registeredName) \
+    static uLib::ObjectRegistrar<className> ULIB_REG_CONCAT(g_ObjectRegistrar_, __LINE__)(registeredName);
+
+} // namespace uLib
+
+#endif // U_CORE_OBJECTFACTORY_H

src/Core/ObjectsContext.cpp

@@ -10,6 +10,7 @@ ObjectsContext::~ObjectsContext() {}
 void ObjectsContext::AddObject(Object* obj) {
     if (obj && std::find(m_objects.begin(), m_objects.end(), obj) == m_objects.end()) {
         m_objects.push_back(obj);
+        ULIB_SIGNAL_EMIT(ObjectsContext::ObjectAdded, obj);
         this->Updated(); // Signal that the context has been updated
     }
 }
@@ -17,13 +18,18 @@ void ObjectsContext::AddObject(Object* obj) {
 void ObjectsContext::RemoveObject(Object* obj) {
     auto it = std::find(m_objects.begin(), m_objects.end(), obj);
     if (it != m_objects.end()) {
+        Object* removedObj = *it;
         m_objects.erase(it);
+        ULIB_SIGNAL_EMIT(ObjectsContext::ObjectRemoved, removedObj);
         this->Updated(); // Signal that the context has been updated
     }
 }
 
 void ObjectsContext::Clear() {
     if (!m_objects.empty()) {
+        for (auto obj : m_objects) {
+            ULIB_SIGNAL_EMIT(ObjectsContext::ObjectRemoved, obj);
+        }
         m_objects.clear();
         this->Updated();
     }
@@ -44,4 +50,12 @@ Object* ObjectsContext::GetObject(size_t index) const {
     return nullptr;
 }
 
+void ObjectsContext::ObjectAdded(Object* obj) {
+    ULIB_SIGNAL_EMIT(ObjectsContext::ObjectAdded, obj);
+}
+
+void ObjectsContext::ObjectRemoved(Object* obj) {
+    ULIB_SIGNAL_EMIT(ObjectsContext::ObjectRemoved, obj);
+}
+
 } // namespace uLib

src/Core/ObjectsContext.h

@@ -14,6 +14,8 @@ public:
     ObjectsContext();
     virtual ~ObjectsContext();
 
+    virtual const char * GetClassName() const { return "ObjectsContext"; }
+
     /**
      * @brief Adds an object to the context.
      * @param obj Pointer to the object to add.
@@ -36,6 +38,12 @@ public:
      * @return Const reference to the vector of object pointers.
      */
     const std::vector<Object*>& GetObjects() const;
+    
+    signals:
+    /** @brief Signal emitted when an object is added. */
+    virtual void ObjectAdded(Object* obj);
+    /** @brief Signal emitted when an object is removed. */
+    virtual void ObjectRemoved(Object* obj);
 
     /**
      * @brief Returns the number of objects in the context.

src/Core/Signal.h

@@ -43,11 +43,23 @@ using namespace boost::placeholders;
 // Signals macro //
 
 #define default(vlaue)
-#define slots
+#ifndef Q_MOC_RUN
+#ifndef signals
 #define signals /*virtual void init_signals();*/ public
+#endif
+#ifndef slots
+#define slots
+#endif
+#ifndef emit
 #define emit
+#endif
+#endif
+#ifndef SLOT
 #define SLOT(a) BOOST_STRINGIZE(a)
+#endif
+#ifndef SIGNAL
 #define SIGNAL(a) BOOST_STRINGIZE(a)
+#endif
 
 #define _ULIB_DETAIL_SIGNAL_EMIT(_name, ...)                                   \
   do {                                                                         \