nodeview can connect and disconnect nodes

app/node/param.cpp

@@ -87,7 +87,7 @@ bool NodeParam::AreDataTypesCompatible(const DataType &output_type, const QList<
   return false;
 }
 
-void NodeParam::ConnectEdge(NodeOutput *output, NodeInput *input)
+NodeEdgePtr NodeParam::ConnectEdge(NodeOutput *output, NodeInput *input)
 {
   // If the input can only accept one input (the default) and has one already, disconnect it
   if (!input->edges_.isEmpty() && !input->can_accept_multiple_inputs()) {
@@ -98,6 +98,8 @@ void NodeParam::ConnectEdge(NodeOutput *output, NodeInput *input)
 
   output->edges_.append(edge);
   input->edges_.append(edge);
+
+  return edge;
 }
 
 void NodeParam::DisconnectEdge(NodeEdgePtr edge)

app/node/param.h

@@ -34,8 +34,7 @@ class NodeParam : public QObject
 public:
   enum Type {
     kInput,
-    kOutput,
-    kBidirectional
+    kOutput
   };
 
   enum DataType {
@@ -69,7 +68,7 @@ public:
   static bool AreDataTypesCompatible(const DataType& output_type, const DataType& input_type);
   static bool AreDataTypesCompatible(const DataType& output_type, const QList<DataType>& input_types);
 
-  static void ConnectEdge(NodeOutput *output, NodeInput *input);
+  static NodeEdgePtr ConnectEdge(NodeOutput *output, NodeInput *input);
   static void DisconnectEdge(NodeEdgePtr edge);
 
   static QString GetDefaultDataTypeName(const DataType &type);