timeline import interaction progress

app/node/output/timeline/timeline.h

@@ -57,6 +57,8 @@ private:
 
   void DetachTrack(TrackOutput* track);
 
+  void AddTrack();
+
   TimelinePanel* attached_timeline_;
 
   NodeInput* track_input_;
@@ -97,6 +99,11 @@ private slots:
    */
   void TrackEdgeRemoved(NodeEdgePtr edge);
 
+  /**
+   * @brief Forwards a PlaceBlock signal to the requested track
+   */
+  void PlaceBlock(Block* block, rational start, int track);
+
 };
 
 #endif // TIMELINEOUTPUT_H