minor code enhancements

app/node/node.h

@@ -473,7 +473,7 @@ signals:
    */
   void LabelChanged(const QString& s);
 
-protected slots:
+public slots:
   void InputChanged(const olive::TimeRange &range, int element);
 
   void InputConnectionChanged(Node* source, int element);

app/node/output/track/track.cpp

@@ -596,6 +596,8 @@ void Track::BlockDisconnected(Node* node, int element)
     return;
   }
 
+  emit BlockRemoved(b);
+
   TimeRange invalidate_range(b->in(), track_length());
 
   // Get cache index
@@ -605,8 +607,6 @@ void Track::BlockDisconnected(Node* node, int element)
   blocks_.removeAt(cache_index);
   block_array_indexes_.removeAt(cache_index);
 
-  emit BlockRemoved(b);
-
   // Update previous/nexts
   Block* previous = b->previous();
   Block* next = b->next();

app/node/output/track/tracklist.h

@@ -66,6 +66,8 @@ public:
     return track_input_;
   }
 
+  ViewerOutput* parent() const;
+
 signals:
   void TrackListChanged();
 
@@ -82,6 +84,17 @@ private:
    * @brief A cache of connected Tracks
    */
   QVector<Track*> track_cache_;
+  QVector<int> track_array_indexes_;
+
+  int GetArrayIndexFromCacheIndex(int index) const
+  {
+    return track_array_indexes_.at(index);
+  }
+
+  int GetCacheIndexFromArrayIndex(int index) const
+  {
+    return track_array_indexes_.indexOf(index);
+  }
 
   NodeInput* track_input_;