Adds initial intermediate qt6 porting state

qt6-after/qt6-migrated-legatus/Lts/Services/AreaEffectSimulation/handler_trajectory.h

@@ -0,0 +1,49 @@
+/**
+  * Handler for all trajectories
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  * Created by Norbert Thoden, ESVG, 2026-01-28
+  */
+#pragma once
+
+#include "object_trajectory.h"
+#include "logger.h"
+
+namespace AreaEffectSimulation
+{
+
+/*!
+ * \brief The HandlerTrajectory class
+ */
+class HandlerTrajectory final
+{
+//  Q_OBJECT
+public:
+  explicit HandlerTrajectory(MainHandler *mainHandler);
+  ~HandlerTrajectory();
+
+  int create(const TrajectoryData& providedData);
+  bool update(const TrajectoryData& providedData);
+  bool remove(const int trajId);
+
+  /*!
+   * \brief createUpdate
+   * \param providedData
+   * \return -1 on error, otherwise provided id;
+   */
+  int createUpdate(const TrajectoryData& providedData);
+
+private:
+  int count() const;
+
+  class Private;
+  /**
+      * The private d->pointer to not break BC when changing internals of this class
+     */
+  Private *d = nullptr;
+
+  LOGGER_T m_logger;
+};
+
+} // Namespace AreaEffectSimulation