improved connector UI in node view

app/node/output/track/track.cpp

@@ -41,7 +41,8 @@ const QString Track::kMutedInput = QStringLiteral("muted_in");
 Track::Track() :
   track_type_(Track::kNone),
   index_(-1),
-  locked_(false)
+  locked_(false),
+  sequence_(nullptr)
 {
   AddInput(kBlockInput, NodeValue::kNone, InputFlags(kInputFlagArray | kInputFlagNotKeyframable));
 

app/node/output/track/track.h

@@ -26,6 +26,8 @@
 
 namespace olive {
 
+class Sequence;
+
 /**
  * @brief A time traversal Node for sorting through one channel/track of Blocks
  */
@@ -388,9 +390,18 @@ public:
 
   bool IsLocked() const;
 
-
   int GetArrayIndexFromBlock(Block* block) const;
 
+  Sequence *sequence() const
+  {
+    return sequence_;
+  }
+
+  void set_sequence(Sequence *sequence)
+  {
+    sequence_ = sequence;
+  }
+
   static const double kTrackHeightDefault;
   static const double kTrackHeightMinimum;
   static const double kTrackHeightInterval;
@@ -472,6 +483,8 @@ private:
 
   bool locked_;
 
+  Sequence *sequence_;
+
 private slots:
   void BlockLengthChanged();
 

app/node/output/track/tracklist.cpp

@@ -83,6 +83,7 @@ void TrackList::TrackConnected(Node *node, int element)
   connect(track, &Track::TrackLengthChanged, this, &TrackList::UpdateTotalLength);
 
   track->set_type(type_);
+  track->set_sequence(parent());
 
   emit TrackListChanged();
 
@@ -121,6 +122,7 @@ void TrackList::TrackDisconnected(Node *node, int element)
 
   track->SetIndex(-1);
   track->set_type(Track::kNone);
+  track->set_sequence(nullptr);
 
   disconnect(track, &Track::TrackLengthChanged, this, &TrackList::UpdateTotalLength);