Add signals for dynamic ports to the data flow classes

Author: paceholder

include/QtNodes/internal/NodeDelegateModel.hpp

@@ -149,6 +149,34 @@ public Q_SLOTS:
   void
   embeddedWidgetSizeUpdated();
 
+  /// Call this function before deleting the data associated with ports.
+  /**
+   * The function notifies the Graph Model and makes it remove and recompute the
+   * affected connection addresses.
+   */
+  void
+  portsAboutToBeDeleted(PortType const  portType,
+                        PortIndex const first,
+                        PortIndex const last);
+
+  /// Call this function when data and port moditications are finished.
+  void
+  portsDeleted();
+
+  /// Call this function before inserting the data associated with ports.
+  /**
+   * The function notifies the Graph Model and makes it recompute the affected
+   * connection addresses.
+   */
+  void
+  portsAboutToBeInserted(PortType const  portType,
+                         PortIndex const first,
+                         PortIndex const last);
+
+  /// Call this function when data and port moditications are finished.
+  void
+  portsInserted();
+
 private:
   NodeStyle _nodeStyle;
 };

src/DataFlowGraphModel.cpp

@@ -92,6 +92,33 @@ addNode(QString const nodeType)
             [newId, this](PortIndex const portIndex)
             { onOutPortDataUpdated(newId, portIndex); });
 
+    connect(model.get(),
+            &NodeDelegateModel::portsAboutToBeDeleted,
+            this,
+            [newId, this](PortType const portType,
+                          PortIndex const first,
+                          PortIndex const last)
+            { portsAboutToBeDeleted(newId, portType, first, last);});
+
+    connect(model.get(),
+            &NodeDelegateModel::portsDeleted,
+            this,
+            &DataFlowGraphModel::portsDeleted);
+
+    connect(model.get(),
+            &NodeDelegateModel::portsAboutToBeInserted,
+            this,
+            [newId, this](PortType const portType,
+                          PortIndex const first,
+                          PortIndex const last)
+            { portsAboutToBeInserted(newId, portType, first, last);});
+
+    connect(model.get(),
+            &NodeDelegateModel::portsInserted,
+            this,
+            &DataFlowGraphModel::portsInserted);
+
+
     _models[newId] = std::move(model);
 
     Q_EMIT nodeCreated(newId);