Add signals to flowscene

Author: russelltg

src/FlowScene.cpp

@@ -57,6 +57,7 @@ createConnection(PortType connectedPort,
 
   _connections[connection->id()] = connection;
 
+  connectionCreated(*connection);
   return connection;
 }
 
@@ -100,6 +101,7 @@ restoreConnection(Properties const &p)
 
   _connections[connection->id()] = connection;
 
+  connectionCreated(*connection);
   return connection;
 }
 
@@ -108,6 +110,7 @@ void
 FlowScene::
 deleteConnection(std::shared_ptr<Connection> connection)
 {
+  connectionDeleted(*connection);
   connection->removeFromNodes();
   _connections.erase(connection->id());
 }
@@ -124,6 +127,7 @@ createNode(std::unique_ptr<NodeDataModel> && dataModel)
 
   _nodes[node->id()] = node;
 
+  nodeCreated(*node);
   return node;
 }
 
@@ -149,6 +153,8 @@ restoreNode(Properties const &p)
   node->restore(p);
 
   _nodes[node->id()] = node;
+  
+  nodeCreated(*node);
   return node;
 }
 
@@ -158,7 +164,8 @@ FlowScene::
 removeNode(NodeGraphicsObject* ngo)
 {
   std::shared_ptr<Node> const node = ngo->node().lock();
-
+  nodeDeleted(*node);
+  
   auto deleteConnections = [&node, this] (PortType portType)
   {
     auto nodeState = node->nodeState();
@@ -183,7 +190,8 @@ FlowScene::
 removeConnection(ConnectionGraphicsObject* cgo)
 {
   std::shared_ptr<Connection> const conn = cgo->connection().lock();
-
+  connectionDeleted(*conn);
+  
   deleteConnection(conn);
 }
 

src/FlowScene.hpp

@@ -22,6 +22,7 @@ class NodeStyle;
 class NODE_EDITOR_PUBLIC FlowScene
   : public QGraphicsScene
 {
+  Q_OBJECT
 public:
 
   FlowScene(std::shared_ptr<DataModelRegistry> registry =
@@ -68,6 +69,13 @@ class NODE_EDITOR_PUBLIC FlowScene
   void
   load();
 
+signals:
+  void nodeCreated(Node& n);
+  void nodeDeleted(Node& n);
+  
+  void connectionCreated(Connection& c);
+  void connectionDeleted(Connection& c);
+  
 private:
 
   using SharedConnection = std::shared_ptr<Connection>;