nodeview: fixed crash when expanding a NodeViewItem with a NodeInputArray

app/widget/nodeview/nodeviewedge.cpp

@@ -56,10 +56,10 @@ NodeEdgePtr NodeViewEdge::edge()
   return edge_;
 }
 
-qreal CalculateEdgeYPoint(NodeViewItem *item, int param_index, NodeViewItem *opposing)
+qreal CalculateEdgeYPoint(NodeViewItem *item, NodeParam* param, NodeViewItem *opposing)
 {
   if (item->IsExpanded()) {
-    return item->pos().y() + item->GetParameterConnectorRect(param_index).center().y();
+    return item->pos().y() + item->GetParameterConnectorRect(param).center().y();
   } else {
     qreal max_height = qMax(opposing->rect().height(), item->rect().height());
 
@@ -89,8 +89,8 @@ void NodeViewEdge::Adjust()
   QPointF input_point = QPointF(input->pos().x() + output->rect().left(), 0);
 
   // Calculate output/input points
-  output_point.setY(CalculateEdgeYPoint(output, edge_->output()->index(), input));
-  input_point.setY(CalculateEdgeYPoint(input, edge_->input()->index(), output));
+  output_point.setY(CalculateEdgeYPoint(output, edge_->output(), input));
+  input_point.setY(CalculateEdgeYPoint(input, edge_->input(), output));
 
   // Draw a line between the two
   setLine(QLineF(

app/widget/nodeview/nodeviewitem.cpp

@@ -154,6 +154,18 @@ QRectF NodeViewItem::GetParameterConnectorRect(int index)
   return connector_rect;
 }
 
+QRectF NodeViewItem::GetParameterConnectorRect(NodeParam *param)
+{
+  NodeParam* root_param = param;
+  Node* parent_node = param->parentNode();
+
+  while (root_param->parent() != parent_node) {
+    root_param = static_cast<NodeParam*>(root_param->parent());
+  }
+
+  return GetParameterConnectorRect(root_param->index());
+}
+
 QPointF NodeViewItem::GetParameterTextPoint(int index)
 {
   if (node_ == nullptr) {

app/widget/nodeview/nodeviewitem.h

@@ -75,6 +75,7 @@ public:
    * Index of the parameter of this node (see NodeParam::index()).
    */
   QRectF GetParameterConnectorRect(int index);
+  QRectF GetParameterConnectorRect(NodeParam* index);
 
 protected:
   virtual void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = nullptr) override;