Adds initial intermediate qt6 porting state

qt6-after/qt6-migrated-legatus/Lts/Common/LtsScriptTimeline/track_select_handler.h

@@ -0,0 +1,39 @@
+#pragma once
+
+#include <QObject>
+
+#include <LtsScriptTimeline/ltsscripttimeline_export.h>
+
+
+class QMouseEvent;
+class QKeyEvent;
+
+
+namespace LtsScriptTimeline
+{
+class TrackContentWidget;
+class TrackEntry;
+
+class LTSSCRIPTTIMELINE_EXPORT SelectHandler : public QObject
+{
+  Q_OBJECT
+
+public:
+  explicit SelectHandler(TrackContentWidget *_tcw)
+    : QObject(nullptr)
+    , tcw(_tcw)
+    , m_pressedEntry(nullptr)
+  {}
+
+  void mouseDoubleClick(QMouseEvent *event);
+  void mousePressEvent(QMouseEvent *event);
+  void mouseReleaseEvent(QMouseEvent *event);
+  void keyPressEvent(QKeyEvent *event);
+
+  TrackContentWidget *tcw;
+  TrackEntry *m_pressedEntry;
+
+public slots:
+  void slotSetDescription();
+};
+}