src/modeleditcontext.h

#pragma once
#include "model.h"
#include "objecttypes/modelobject.h"

class Model::EditContext
{
public:
	template<typename T, typename... Args>
	T* append(Args&&... args);
	template<typename T, typename... Args>
	T* insert(int position, Args&&... args);
	void setObjectProperty(
		modelobjects::BaseObject* object,
		modelobjects::Property property,
		const QVariant &value);
private:
	EditContext(Model& model);
	friend class Model;
	Model& model;
};

template<typename T, typename... Args>
T* Model::EditContext::append(Args&&... args)
{
	return this->model.append<T>(args...);
}

template<typename T, typename... Args>
T* Model::EditContext::insert(int position, Args&&... args)
{
	return this->model.insert<T>(position, args...);
}