Merge branch 'node-rework' into track-redux

app/node/audio/pan/pan.cpp

@@ -38,7 +38,7 @@ PanNode::PanNode()
   SetInputProperty(kPanningInput, QStringLiteral("max"), 1.0);
   SetInputProperty(kPanningInput, QStringLiteral("view"), FloatSlider::kPercentage);
 
-  SetFlags(kAudioEffect);
+  SetFlag(kAudioEffect);
   SetEffectInput(kSamplesInput);
 }
 

app/node/audio/volume/volume.cpp

@@ -37,7 +37,7 @@ VolumeNode::VolumeNode()
   SetInputProperty(kVolumeInput, QStringLiteral("min"), 0.0);
   SetInputProperty(kVolumeInput, QStringLiteral("view"), FloatSlider::kDecibel);
 
-  SetFlags(kAudioEffect);
+  SetFlag(kAudioEffect);
   SetEffectInput(kSamplesInput);
 }
 

app/node/block/block.cpp

@@ -46,7 +46,7 @@ Block::Block() :
 
   SetInputFlags(kEnabledInput, InputFlags(GetInputFlags(kEnabledInput) | kInputFlagNotConnectable | kInputFlagNotKeyframable));
 
-  SetFlags(kDontShowInParamView);
+  SetFlag(kDontShowInParamView);
 }
 
 QVector<Node::CategoryID> Block::Category() const

app/node/block/subtitle/subtitle.cpp

@@ -38,7 +38,7 @@ SubtitleBlock::SubtitleBlock()
   SetInputFlags(kMaintainAudioPitchInput, InputFlags(GetInputFlags(kMaintainAudioPitchInput) | kInputFlagHidden));
 
   // Undo block flag that hides in param view
-  SetFlags(GetFlags() & ~kDontShowInParamView);
+  SetFlag(kDontShowInParamView, false);
 }
 
 QString SubtitleBlock::Name() const

app/node/block/transition/transition.cpp

@@ -47,7 +47,7 @@ TransitionBlock::TransitionBlock() :
   SetInputProperty(kCenterInput, QStringLiteral("view"), RationalSlider::kTime);
   SetInputProperty(kCenterInput, QStringLiteral("viewlock"), true);
 
-  SetFlags(GetFlags() & ~kDontShowInParamView);
+  SetFlag(kDontShowInParamView, false);
 }
 
 void TransitionBlock::Retranslate()

app/node/color/ociobase/ociobase.cpp

@@ -38,7 +38,7 @@ OCIOBaseNode::OCIOBaseNode() :
   connect(this, &Node::AddedToGraph, this, &OCIOBaseNode::AddedToGraph);
   connect(this, &Node::RemovedFromGraph, this, &OCIOBaseNode::RemovedFromGraph);
 
-  SetFlags(kVideoEffect);
+  SetFlag(kVideoEffect);
 }
 
 void OCIOBaseNode::AddedToGraph(Project *p)

app/node/distort/cornerpin/cornerpindistortnode.cpp

@@ -51,7 +51,7 @@ CornerPinDistortNode::CornerPinDistortNode()
   gizmo_resize_handle_[2] = AddDraggableGizmo<PointGizmo>({NodeKeyframeTrackReference(NodeInput(this, kBottomRightInput), 0), NodeKeyframeTrackReference(NodeInput(this, kBottomRightInput), 1)});
   gizmo_resize_handle_[3] = AddDraggableGizmo<PointGizmo>({NodeKeyframeTrackReference(NodeInput(this, kBottomLeftInput), 0), NodeKeyframeTrackReference(NodeInput(this, kBottomLeftInput), 1)});
 
-  SetFlags(kVideoEffect);
+  SetFlag(kVideoEffect);
   SetEffectInput(kTextureInput);
 }
 

app/node/distort/crop/cropdistortnode.cpp

@@ -59,7 +59,7 @@ CropDistortNode::CropDistortNode()
   point_gizmo_[kGizmoScaleCenterLeft] = AddDraggableGizmo<PointGizmo>({kLeftInput});
   point_gizmo_[kGizmoScaleCenterRight] = AddDraggableGizmo<PointGizmo>({kRightInput});
 
-  SetFlags(kVideoEffect);
+  SetFlag(kVideoEffect);
   SetEffectInput(kTextureInput);
 }
 

app/node/distort/flip/flipdistortnode.cpp

@@ -36,7 +36,7 @@ FlipDistortNode::FlipDistortNode()
 
   AddInput(kVerticalInput, NodeValue::kBoolean, false);
 
-  SetFlags(kVideoEffect);
+  SetFlag(kVideoEffect);
   SetEffectInput(kTextureInput);
 }
 

app/node/distort/ripple/rippledistortnode.cpp

@@ -44,7 +44,7 @@ RippleDistortNode::RippleDistortNode()
   AddInput(kPositionInput, NodeValue::kVec2, QVector2D(0, 0));
   AddInput(kStretchInput, NodeValue::kBoolean, false);
 
-  SetFlags(kVideoEffect);
+  SetFlag(kVideoEffect);
   SetEffectInput(kTextureInput);
 
   gizmo_ = AddDraggableGizmo<PointGizmo>({

app/node/distort/swirl/swirldistortnode.cpp

@@ -41,7 +41,7 @@ SwirlDistortNode::SwirlDistortNode()
 
   AddInput(kPositionInput, NodeValue::kVec2, QVector2D(0, 0));
 
-  SetFlags(kVideoEffect);
+  SetFlag(kVideoEffect);
   SetEffectInput(kTextureInput);
 
   gizmo_ = AddDraggableGizmo<PointGizmo>({

app/node/distort/tile/tiledistortnode.cpp

@@ -48,7 +48,7 @@ TileDistortNode::TileDistortNode()
   AddInput(kMirrorXInput, NodeValue::kBoolean, false);
   AddInput(kMirrorYInput, NodeValue::kBoolean, false);
 
-  SetFlags(kVideoEffect);
+  SetFlag(kVideoEffect);
   SetEffectInput(kTextureInput);
 
   gizmo_ = AddDraggableGizmo<PointGizmo>({

app/node/distort/transform/transformdistortnode.cpp

@@ -64,7 +64,7 @@ TransformDistortNode::TransformDistortNode()
     point_gizmo_[i]->SetDragValueBehavior(PointGizmo::kAbsolute);
   }
 
-  SetFlags(kVideoEffect);
+  SetFlag(kVideoEffect);
   SetEffectInput(kTextureInput);
 }
 

app/node/distort/wave/wavedistortnode.cpp

@@ -40,7 +40,7 @@ WaveDistortNode::WaveDistortNode()
 
   AddInput(kVerticalInput, NodeValue::kCombo, false);
 
-  SetFlags(kVideoEffect);
+  SetFlag(kVideoEffect);
   SetEffectInput(kTextureInput);
 }
 

app/node/effect/opacity/opacityeffect.cpp

@@ -25,7 +25,7 @@ OpacityEffect::OpacityEffect()
   SetInputProperty(kValueInput, QStringLiteral("min"), 0.0);
   SetInputProperty(kValueInput, QStringLiteral("max"), 1.0);
 
-  SetFlags(kVideoEffect);
+  SetFlag(kVideoEffect);
   SetEffectInput(kTextureInput);
 }
 

app/node/filter/blur/blur.cpp

@@ -66,7 +66,7 @@ BlurFilterNode::BlurFilterNode()
 
   AddInput(kRepeatEdgePixelsInput, NodeValue::kBoolean, true);
 
-  SetFlags(kVideoEffect);
+  SetFlag(kVideoEffect);
   SetEffectInput(kTextureInput);
 
   radial_center_gizmo_ = AddDraggableGizmo<PointGizmo>();

app/node/filter/dropshadow/dropshadowfilter.cpp

@@ -54,7 +54,7 @@ DropShadowFilter::DropShadowFilter()
   AddInput(kFastInput, NodeValue::kBoolean, false);
 
   SetEffectInput(kTextureInput);
-  SetFlags(kVideoEffect);
+  SetFlag(kVideoEffect);
 }
 
 void DropShadowFilter::Retranslate()

app/node/filter/mosaic/mosaicfilternode.cpp

@@ -38,7 +38,7 @@ MosaicFilterNode::MosaicFilterNode()
   AddInput(kVertInput, NodeValue::kFloat, 18.0);
   SetInputProperty(kVertInput, QStringLiteral("min"), 1.0);
 
-  SetFlags(kVideoEffect);
+  SetFlag(kVideoEffect);
   SetEffectInput(kTextureInput);
 }
 

app/node/filter/stroke/stroke.cpp

@@ -48,7 +48,7 @@ StrokeFilterNode::StrokeFilterNode()
 
   AddInput(kInnerInput, NodeValue::kBoolean, false);
 
-  SetFlags(kVideoEffect);
+  SetFlag(kVideoEffect);
   SetEffectInput(kTextureInput);
 }
 

app/node/generator/noise/noise.cpp

@@ -41,7 +41,7 @@ NoiseGeneratorNode::NoiseGeneratorNode()
   AddInput(kColorInput, NodeValue::kBoolean, false);
 
   SetEffectInput(kBaseIn);
-  SetFlags(kVideoEffect);
+  SetFlag(kVideoEffect);
 }
 
 QString NoiseGeneratorNode::Name() const

app/node/generator/shape/generatorwithmerge.cpp

@@ -32,7 +32,7 @@ GeneratorWithMerge::GeneratorWithMerge()
 {
   AddInput(kBaseInput, NodeValue::kTexture, InputFlags(kInputFlagNotKeyframable));
   SetEffectInput(kBaseInput);
-  SetFlags(kVideoEffect);
+  SetFlag(kVideoEffect);
 }
 
 void GeneratorWithMerge::Retranslate()

app/node/generator/text/textv1.cpp

@@ -54,7 +54,7 @@ TextGeneratorV1::TextGeneratorV1()
 
   AddInput(kFontSizeInput, NodeValue::kFloat, 72.0f);
 
-  SetFlags(kDontShowInCreateMenu);
+  SetFlag(kDontShowInCreateMenu);
 }
 
 QString TextGeneratorV1::Name() const

app/node/generator/text/textv2.cpp

@@ -56,7 +56,7 @@ TextGeneratorV2::TextGeneratorV2()
   SetStandardValue(kColorInput, QVariant::fromValue(Color(1.0f, 1.0f, 1.0)));
   SetStandardValue(kSizeInput, QVector2D(400, 300));
 
-  SetFlags(kDontShowInCreateMenu);
+  SetFlag(kDontShowInCreateMenu);
 }
 
 QString TextGeneratorV2::Name() const

app/node/group/group.cpp

@@ -29,7 +29,7 @@ namespace olive {
 NodeGroup::NodeGroup() :
   output_passthrough_(nullptr)
 {
-  SetFlags(kDontShowInCreateMenu);
+  SetFlag(kDontShowInCreateMenu);
 }
 
 QString NodeGroup::Name() const

app/node/keying/colordifferencekey/colordifferencekey.cpp

@@ -47,7 +47,7 @@ ColorDifferenceKeyNode::ColorDifferenceKeyNode()
 
   AddInput(kMaskOnlyInput, NodeValue::kBoolean, false);
 
-  SetFlags(kVideoEffect);
+  SetFlag(kVideoEffect);
   SetEffectInput(kTextureInput);
 }
 

app/node/keying/despill/despill.cpp

@@ -36,7 +36,7 @@ DespillNode::DespillNode()
 
   AddInput(kPreserveLuminanceInput, NodeValue::kBoolean, false);
 
-  SetFlags(kVideoEffect);
+  SetFlag(kVideoEffect);
   SetEffectInput(kTextureInput);
 }
 

app/node/math/merge/merge.cpp

@@ -35,7 +35,7 @@ MergeNode::MergeNode()
 
   AddInput(kBlendIn, NodeValue::kTexture, InputFlags(kInputFlagNotKeyframable));
 
-  SetFlags(kDontShowInParamView);
+  SetFlag(kDontShowInParamView);
 }
 
 QString MergeNode::Name() const

app/node/node.cpp

@@ -103,10 +103,14 @@ void Node::Retranslate()
   SetInputName(kEnabledInput, tr("Enabled"));
 }
 
-QIcon Node::icon() const
+QVariant Node::data(const DataType &d) const
 {
-  // Just a meaningless default icon to be used where necessary
-  return icon::New;
+  if (d == ICON) {
+    // Just a meaningless default icon to be used where necessary
+    return icon::New;
+  }
+
+  return QVariant();
 }
 
 bool Node::SetNodePositionInContext(Node *node, const QPointF &pos)

app/node/node.h

@@ -100,7 +100,8 @@ public:
     kDontShowInParamView = 0x1,
     kVideoEffect = 0x2,
     kAudioEffect = 0x4,
-    kDontShowInCreateMenu = 0x8
+    kDontShowInCreateMenu = 0x8,
+    kIsItem = 0x10
   };
 
   struct ContextPair {
@@ -184,24 +185,23 @@ public:
     return folder_;
   }
 
-  virtual bool IsItem() const
-  {
-    return false;
-  }
+  bool IsItem() const { return flags_ & kIsItem; }
 
   /**
    * @brief Function called to retranslate parameter names (should be overridden in derivatives)
    */
   virtual void Retranslate();
 
-  virtual QIcon icon() const;
+  enum DataType
+  {
+    ICON,
+    DURATION,
+    CREATED_TIME,
+    MODIFIED_TIME,
+    FREQUENCY_RATE
+  };
 
-  virtual QString duration() const {return QString();}
-
-  virtual qint64 creation_time() const {return 0;}
-  virtual qint64 mod_time() const {return 0;}
-
-  virtual QString rate() const {return QString();}
+  virtual QVariant data(const DataType &d) const;
 
   const QVector<QString>& inputs() const
   {
@@ -1196,9 +1196,13 @@ protected:
     tooltip_ = s;
   }
 
-  void SetFlags(const uint64_t &f)
+  void SetFlag(Flag f, bool on = true)
   {
-    flags_ = f;
+    if (on) {
+      flags_ |= f;
+    } else {
+      flags_ &= ~f;
+    }
   }
 
   template<typename T>

app/node/output/viewer/viewer.cpp

@@ -61,7 +61,7 @@ ViewerOutput::ViewerOutput(bool create_buffer_inputs, bool create_default_stream
     set_default_parameters();
   }
 
-  SetFlags(kDontShowInParamView);
+  SetFlag(kDontShowInParamView);
 
   workarea_ = new TimelineWorkArea(this);
   markers_ = new TimelineMarkerList(this);
@@ -87,56 +87,61 @@ QString ViewerOutput::Description() const
   return tr("Interface between a Viewer panel and the node system.");
 }
 
-QString ViewerOutput::duration() const
+QVariant ViewerOutput::data(const DataType &d) const
 {
-  rational using_timebase;
-  Timecode::Display using_display = Core::instance()->GetTimecodeDisplay();
+  switch (d) {
+  case DURATION:
+  {
+    rational using_timebase;
+    Timecode::Display using_display = Core::instance()->GetTimecodeDisplay();
 
-  // Get first enabled streams
-  VideoParams video = GetFirstEnabledVideoStream();
-  AudioParams audio = GetFirstEnabledAudioStream();
-  SubtitleParams sub = GetFirstEnabledSubtitleStream();
+    // Get first enabled streams
+    VideoParams video = GetFirstEnabledVideoStream();
+    AudioParams audio = GetFirstEnabledAudioStream();
+    SubtitleParams sub = GetFirstEnabledSubtitleStream();
 
-  if (video.is_valid() && video.video_type() != VideoParams::kVideoTypeStill) {
-    // Prioritize video
-    using_timebase = video.frame_rate_as_time_base();
-  } else if (audio.is_valid()) {
-    // Use audio as a backup
-    // If we're showing in a timecode, we prefer showing audio in seconds instead
-    if (using_display == Timecode::kTimecodeDropFrame
-        || using_display == Timecode::kTimecodeNonDropFrame) {
-      using_display = Timecode::kTimecodeSeconds;
+    if (video.is_valid() && video.video_type() != VideoParams::kVideoTypeStill) {
+      // Prioritize video
+      using_timebase = video.frame_rate_as_time_base();
+    } else if (audio.is_valid()) {
+      // Use audio as a backup
+      // If we're showing in a timecode, we prefer showing audio in seconds instead
+      if (using_display == Timecode::kTimecodeDropFrame
+          || using_display == Timecode::kTimecodeNonDropFrame) {
+        using_display = Timecode::kTimecodeSeconds;
+      }
+
+      using_timebase = audio.sample_rate_as_time_base();
+    } else if (sub.is_valid()) {
+      using_timebase = OLIVE_CONFIG("DefaultSequenceFrameRate").value<rational>();
     }
 
-    using_timebase = audio.sample_rate_as_time_base();
-  } else if (sub.is_valid()) {
-    using_timebase = OLIVE_CONFIG("DefaultSequenceFrameRate").value<rational>();
+    if (!using_timebase.isNull()) {
+      // Return time transformed to timecode
+      return QString::fromStdString(Timecode::time_to_timecode(GetLength(), using_timebase, using_display));
+    }
+    break;
+  }
+  case FREQUENCY_RATE:
+  {
+    VideoParams video_stream;
+
+    if (HasEnabledVideoStreams()
+        && (video_stream = GetFirstEnabledVideoStream()).video_type() != VideoParams::kVideoTypeStill) {
+      // This is a video editor, prioritize video streams
+      return tr("%1 FPS").arg(video_stream.frame_rate().toDouble());
+    } else if (HasEnabledAudioStreams()) {
+      // No video streams, return audio
+      AudioParams audio_stream = GetFirstEnabledAudioStream();
+      return tr("%1 Hz").arg(audio_stream.sample_rate());
+    }
+    break;
+  }
+  default:
+    break;
   }
 
-  if (using_timebase.isNull()) {
-    // No timebase, return null
-    return QString();
-  } else {
-    // Return time transformed to timecode
-    return QString::fromStdString(Timecode::time_to_timecode(GetLength(), using_timebase, using_display));
-  }
-}
-
-QString ViewerOutput::rate() const
-{
-  VideoParams video_stream;
-
-  if (HasEnabledVideoStreams()
-      && (video_stream = GetFirstEnabledVideoStream()).video_type() != VideoParams::kVideoTypeStill) {
-    // This is a video editor, prioritize video streams
-    return tr("%1 FPS").arg(video_stream.frame_rate().toDouble());
-  } else if (HasEnabledAudioStreams()) {
-    // No video streams, return audio
-    AudioParams audio_stream = GetFirstEnabledAudioStream();
-    return tr("%1 Hz").arg(audio_stream.sample_rate());
-  }
-
-  return QString();
+  return super::data(d);
 }
 
 bool ViewerOutput::HasEnabledVideoStreams() const

app/node/output/viewer/viewer.h

@@ -53,8 +53,7 @@ public:
   virtual QVector<CategoryID> Category() const override;
   virtual QString Description() const override;
 
-  virtual QString duration() const override;
-  virtual QString rate() const override;
+  virtual QVariant data(const DataType &d) const override;
 
   void set_default_parameters();
 

app/node/project/folder/folder.cpp

@@ -34,12 +34,18 @@ const QString Folder::kChildInput = QStringLiteral("child_in");
 
 Folder::Folder()
 {
+  SetFlag(kIsItem);
+
   AddInput(kChildInput, NodeValue::kNone, InputFlags(kInputFlagArray | kInputFlagNotKeyframable));
 }
 
-QIcon Folder::icon() const
+QVariant Folder::data(const DataType &d) const
 {
-  return icon::Folder;
+  if (d == ICON) {
+    return icon::Folder;
+  }
+
+  return super::data(d);
 }
 
 void Folder::Retranslate()

app/node/project/folder/folder.h

@@ -59,7 +59,7 @@ public:
     return tr("Organize several items into a single collection.");
   }
 
-  virtual QIcon icon() const override;
+  virtual QVariant data(const DataType &d) const override;
 
   virtual void Retranslate() override;
 
@@ -86,11 +86,6 @@ public:
     return item_children_;
   }
 
-  virtual bool IsItem() const override
-  {
-    return true;
-  }
-
   int index_of_child(Node* item) const
   {
     return item_children_.indexOf(item);

app/node/project/footage/footage.cpp

@@ -46,6 +46,8 @@ Footage::Footage(const QString &filename) :
   cancelled_(nullptr),
   total_stream_count_(0)
 {
+  SetFlag(kIsItem);
+
   PrependInput(kFilenameInput, NodeValue::kFile, InputFlags(kInputFlagNotConnectable | kInputFlagNotKeyframable));
 
   Clear();
@@ -203,26 +205,6 @@ const QString &Footage::decoder() const
   return decoder_;
 }
 
-QIcon Footage::icon() const
-{
-  if (valid_ && GetTotalStreamCount()) {
-    // Prioritize video > audio > image
-    VideoParams s = GetFirstEnabledVideoStream();
-
-    if (s.is_valid() && s.video_type() != VideoParams::kVideoTypeStill) {
-      return icon::Video;
-    } else if (HasEnabledAudioStreams()) {
-      return icon::Audio;
-    } else if (s.is_valid() && s.video_type() == VideoParams::kVideoTypeStill) {
-      return icon::Image;
-    } else if (HasEnabledSubtitleStreams()) {
-      return icon::Subtitles;
-    }
-  }
-
-  return icon::Error;
-}
-
 QString Footage::DescribeVideoStream(const VideoParams &params)
 {
   if (params.video_type() == VideoParams::kVideoTypeStill) {
@@ -375,26 +357,51 @@ void Footage::LoadFinishedEvent()
   }
 }
 
-qint64 Footage::creation_time() const
+QVariant Footage::data(const DataType &d) const
 {
-  QFileInfo info(filename());
+  switch (d) {
+  case CREATED_TIME:
+  {
+    QFileInfo info(filename());
 
-  if (info.exists()) {
-    return QtUtils::GetCreationDate(info).toSecsSinceEpoch();
+    if (info.exists()) {
+      return QtUtils::GetCreationDate(info).toSecsSinceEpoch();
+    }
+    break;
+  }
+  case MODIFIED_TIME:
+  {
+    QFileInfo info(filename());
+
+    if (info.exists()) {
+      return info.lastModified().toSecsSinceEpoch();
+    }
+    break;
+  }
+  case ICON:
+  {
+    if (valid_ && GetTotalStreamCount()) {
+      // Prioritize video > audio > image
+      VideoParams s = GetFirstEnabledVideoStream();
+
+      if (s.is_valid() && s.video_type() != VideoParams::kVideoTypeStill) {
+        return icon::Video;
+      } else if (HasEnabledAudioStreams()) {
+        return icon::Audio;
+      } else if (s.is_valid() && s.video_type() == VideoParams::kVideoTypeStill) {
+        return icon::Image;
+      } else if (HasEnabledSubtitleStreams()) {
+        return icon::Subtitles;
+      }
+    }
+
+    return icon::Error;
+  }
+  default:
+    break;
   }
 
-  return 0;
-}
-
-qint64 Footage::mod_time() const
-{
-  QFileInfo info(filename());
-
-  if (info.exists()) {
-    return info.lastModified().toSecsSinceEpoch();
-  }
-
-  return 0;
+  return super::data(d);
 }
 
 void Footage::UpdateTooltip()

app/node/project/footage/footage.h

@@ -153,13 +153,6 @@ public:
    */
   const QString& decoder() const;
 
-  virtual QIcon icon() const override;
-
-  virtual bool IsItem() const override
-  {
-    return true;
-  }
-
   static QString DescribeVideoStream(const VideoParams& params);
   static QString DescribeAudioStream(const AudioParams& params);
   static QString DescribeSubtitleStream(const SubtitleParams& params);
@@ -176,8 +169,7 @@ public:
 
   virtual void LoadFinishedEvent() override;
 
-  virtual qint64 creation_time() const override;
-  virtual qint64 mod_time() const override;
+  virtual QVariant data(const DataType &d) const override;
 
   virtual int GetTotalStreamCount() const override { return total_stream_count_; }
 

app/node/project/sequence/sequence.cpp

@@ -34,6 +34,8 @@ const QString Sequence::kTrackInputFormat = QStringLiteral("track_in_%1");
 
 Sequence::Sequence()
 {
+  SetFlag(kIsItem);
+
   // Create TrackList instances
   track_lists_.resize(Track::kCount);
 
@@ -71,9 +73,13 @@ void Sequence::add_default_nodes(MultiUndoCommand* command)
   }
 }
 
-QIcon Sequence::icon() const
+QVariant Sequence::data(const DataType &d) const
 {
-  return icon::Sequence;
+  if (d == ICON) {
+    return icon::Sequence;
+  }
+
+  return super::data(d);
 }
 
 QVector<Track *> Sequence::GetUnlockedTracks() const

app/node/project/sequence/sequence.h

@@ -59,7 +59,7 @@ public:
 
   void add_default_nodes(MultiUndoCommand *command = nullptr);
 
-  virtual QIcon icon() const override;
+  virtual QVariant data(const DataType &d) const override;
 
   const QVector<Track *> &GetTracks() const
   {
@@ -87,11 +87,6 @@ public:
 
   static const QString kTrackInputFormat;
 
-  virtual bool IsItem() const override
-  {
-    return true;
-  }
-
 protected:
   virtual void InputConnectedEvent(const QString &input, int element, Node *output) override;