diff --git a/gui/include/Visualization/operations/MenuBuilder.h b/gui/include/Visualization/operations/MenuBuilder.h
new file mode 100644
index 0000000..d5ee390
--- /dev/null
+++ b/gui/include/Visualization/operations/MenuBuilder.h
@@ -0,0 +1,59 @@
+#ifndef SCIQLOP_MENUBUILDER_H
+#define SCIQLOP_MENUBUILDER_H
+
+#include <QLoggingCategory>
+#include <QMenu>
+#include <QStack>
+
+Q_DECLARE_LOGGING_CATEGORY(LOG_MenuBuilder)
+
+/// Helper assigned to build a hierarchical menu
+class MenuBuilder {
+public:
+    /**
+     * Ctor
+     * @param menu the parent menu
+     */
+    explicit MenuBuilder(QMenu *menu);
+
+    /**
+     * Adds action to the current menu
+     * @param actionName the name of the action
+     * @param actionFunction the function that will be executed when the action is triggered
+     */
+    template <typename ActionFun>
+    void addAction(const QString &actionName, ActionFun actionFunction);
+
+    /**
+     * Adds a new menu to the current menu
+     * @param name the name of the menu
+     */
+    void addMenu(const QString &name);
+
+    /// Adds a separator to the current menu. The separator is added only if the menu already
+    /// contains entries
+    void addSeparator();
+
+    /// Closes the current menu
+    void closeMenu();
+
+private:
+    /// @return the current menu (i.e. the top menu of the stack), nullptr if there is no menu
+    QMenu *currentMenu() const;
+
+    /// Stack of all menus currently opened
+    QStack<QMenu *> m_Menus{};
+};
+
+template <typename ActionFun>
+void MenuBuilder::addAction(const QString &actionName, ActionFun actionFunction)
+{
+    if (auto currMenu = currentMenu()) {
+        currMenu->addAction(actionName, actionFunction);
+    }
+    else {
+        qCCritical(LOG_MenuBuilder()) << QObject::tr("No current menu to attach the action");
+    }
+}
+
+#endif // SCIQLOP_MENUBUILDER_H
diff --git a/gui/src/Visualization/operations/GenerateVariableMenuOperation.cpp b/gui/src/Visualization/operations/GenerateVariableMenuOperation.cpp
index 6842a59..2bd5ae2 100644
--- a/gui/src/Visualization/operations/GenerateVariableMenuOperation.cpp
+++ b/gui/src/Visualization/operations/GenerateVariableMenuOperation.cpp
@@ -1,4 +1,5 @@
 #include "Visualization/operations/GenerateVariableMenuOperation.h"
+#include "Visualization/operations/MenuBuilder.h"
 
 #include "Visualization/VisualizationGraphWidget.h"
 #include "Visualization/VisualizationTabWidget.h"
@@ -11,97 +12,6 @@
 
 Q_LOGGING_CATEGORY(LOG_GenerateVariableMenuOperation, "GenerateVariableMenuOperation")
 
-namespace {
-
-/// Helper assigned to build the hierarchical menu associated with a variable
-struct MenuBuilder {
-    /**
-     * Ctor
-     * @param menu the parent menu
-     */
-    explicit MenuBuilder(QMenu *menu)
-    {
-        if (menu) {
-            m_Menus.push(menu);
-        }
-        else {
-            qCCritical(LOG_GenerateVariableMenuOperation())
-                << QObject::tr("No parent menu has been defined");
-        }
-    }
-
-    /**
-     * Adds action to the current menu
-     * @param actionName the name of the action
-     * @param actionFunction the function that will be executed when the action is triggered
-     */
-    template <typename ActionFun>
-    void addAction(const QString &actionName, ActionFun actionFunction)
-    {
-        if (auto currMenu = currentMenu()) {
-            currMenu->addAction(actionName, actionFunction);
-        }
-        else {
-            qCCritical(LOG_GenerateVariableMenuOperation())
-                << QObject::tr("No current menu to attach the action");
-        }
-    }
-
-    /**
-     * Adds a new menu to the current menu
-     * @param name the name of the menu
-     */
-    void addMenu(const QString &name)
-    {
-        if (auto currMenu = currentMenu()) {
-            m_Menus.push(currMenu->addMenu(name));
-        }
-        else {
-            qCCritical(LOG_GenerateVariableMenuOperation())
-                << QObject::tr("No current menu to attach the new menu");
-        }
-    }
-
-    /// Adds a separator to the current menu. The separator is added only if the menu already
-    /// contains entries
-    void addSeparator()
-    {
-        if (auto currMenu = currentMenu()) {
-            if (!currMenu->isEmpty()) {
-                currMenu->addSeparator();
-            }
-        }
-        else {
-            qCCritical(LOG_GenerateVariableMenuOperation())
-                << QObject::tr("No current menu to attach the separator");
-        }
-    }
-
-    /// Closes the current menu
-    void closeMenu()
-    {
-        if (!m_Menus.isEmpty()) {
-            if (auto closedMenu = m_Menus.pop()) {
-                // Purge menu : if the closed menu has no entries, we remove it from its parent (the
-                // current menu)
-                if (auto currMenu = currentMenu()) {
-                    if (closedMenu->isEmpty()) {
-                        currMenu->removeAction(closedMenu->menuAction());
-                    }
-                }
-            }
-        }
-    }
-
-    /// @return the current menu (i.e. the top menu of the stack), nullptr if there is no menu
-    QMenu *currentMenu() const { return !m_Menus.isEmpty() ? m_Menus.top() : nullptr; }
-
-    /// Stack of all menus currently opened
-    QStack<QMenu *> m_Menus{};
-};
-
-} // namespace
-
 struct GenerateVariableMenuOperation::GenerateVariableMenuOperationPrivate {
     explicit GenerateVariableMenuOperationPrivate(QMenu *menu, std::shared_ptr<Variable> variable)
             : m_Variable{variable}, m_MenuBuilder{menu}
diff --git a/gui/src/Visualization/operations/MenuBuilder.cpp b/gui/src/Visualization/operations/MenuBuilder.cpp
new file mode 100644
index 0000000..23b8e01
--- /dev/null
+++ b/gui/src/Visualization/operations/MenuBuilder.cpp
@@ -0,0 +1,55 @@
+#include "Visualization/operations/MenuBuilder.h"
+
+Q_LOGGING_CATEGORY(LOG_MenuBuilder, "MenuBuilder")
+
+MenuBuilder::MenuBuilder(QMenu *menu)
+{
+    if (menu) {
+        m_Menus.push(menu);
+    }
+    else {
+        qCCritical(LOG_MenuBuilder()) << QObject::tr("No parent menu has been defined");
+    }
+}
+
+void MenuBuilder::addMenu(const QString &name)
+{
+    if (auto currMenu = currentMenu()) {
+        m_Menus.push(currMenu->addMenu(name));
+    }
+    else {
+        qCCritical(LOG_MenuBuilder()) << QObject::tr("No current menu to attach the new menu");
+    }
+}
+
+void MenuBuilder::addSeparator()
+{
+    if (auto currMenu = currentMenu()) {
+        if (!currMenu->isEmpty()) {
+            currMenu->addSeparator();
+        }
+    }
+    else {
+        qCCritical(LOG_MenuBuilder()) << QObject::tr("No current menu to attach the separator");
+    }
+}
+
+void MenuBuilder::closeMenu()
+{
+    if (!m_Menus.isEmpty()) {
+        if (auto closedMenu = m_Menus.pop()) {
+            // Purge menu : if the closed menu has no entries, we remove it from its parent (the
+            // current menu)
+            if (auto currMenu = currentMenu()) {
+                if (closedMenu->isEmpty()) {
+                    currMenu->removeAction(closedMenu->menuAction());
+                }
+            }
+        }
+    }
+}
+
+QMenu *MenuBuilder::currentMenu() const
+{
+    return !m_Menus.isEmpty() ? m_Menus.top() : nullptr;
+}