Providing _sortFlag allows the user to choose for themselves whether to use Models loading order or automatic sorting.

Author: zmoth

include/QtNodes/internal/DataFlowGraphicsScene.hpp

@@ -33,6 +33,8 @@ class NODE_EDITOR_PUBLIC DataFlowGraphicsScene
   QMenu *
   createSceneMenu(QPointF const scenePos) override;
 
+  void
+  sortSceneMenu(bool sort);
 
 public Q_SLOTS:
   void
@@ -47,6 +49,8 @@ public Q_SLOTS:
 
 private:
   DataFlowGraphModel &_graphModel;
+
+  bool _sortFlag;
 };
 
 }

include/QtNodes/internal/NodeDelegateModelRegistry.hpp

@@ -9,7 +9,6 @@
 
 #include <functional>
 #include <memory>
-#include <set>
 #include <type_traits>
 #include <unordered_map>
 #include <utility>
@@ -29,7 +28,7 @@ class NODE_EDITOR_PUBLIC NodeDelegateModelRegistry
   using RegistryItemPtr = std::unique_ptr<NodeDelegateModel>;
   using RegistryItemCreator = std::function<RegistryItemPtr ()>;
   using RegisteredModelCreatorsMap = std::unordered_map<QString, RegistryItemCreator>;
-  using RegisteredModelsCategoryMap = std::unordered_map<QString, QString>;
+  using RegisteredModelsCategoryMap = std::vector<std::pair<QString, QString>>;
 
   //using RegisteredTypeConvertersMap = std::map<TypeConverterId, TypeConverter>;
 
@@ -56,7 +55,7 @@ class NODE_EDITOR_PUBLIC NodeDelegateModelRegistry
     if (!_registeredItemCreators.count(name))
     {
       _registeredItemCreators[name] = std::move(creator);
-      _registeredModelsCategory[name] = category;
+      _registeredModelsCategory.push_back(std::pair(name, category));
     }
   }
 

src/DataFlowGraphicsScene.cpp

@@ -36,6 +36,7 @@ DataFlowGraphicsScene(DataFlowGraphModel& graphModel,
                       QObject*            parent)
   : BasicGraphicsScene(graphModel, parent)
   , _graphModel(graphModel)
+  , _sortFlag(true)
 {
   connect(&_graphModel, &DataFlowGraphModel::inPortDataWasSet,
           [this](NodeId const nodeId, PortType const, PortIndex const)
@@ -120,9 +121,11 @@ createSceneMenu(QPointF const scenePos)
     childItem->setText(0, assoc.first);
   }
 
-  treeView->sortByColumn(0, Qt::AscendingOrder);
   treeView->expandAll();
 
+  if (_sortFlag)
+    treeView->sortByColumn(0, Qt::AscendingOrder);
+
   connect(treeView, &QTreeWidget::itemClicked,
           [this,
            modelMenu,
@@ -148,6 +151,10 @@ createSceneMenu(QPointF const scenePos)
               auto modelName = (*it)->text(0);
               const bool match = (modelName.contains(text, Qt::CaseInsensitive));
               (*it)->setHidden(!match);
+              // if (match)
+              // {
+              //   treeView->scrollToItem(*it);
+              // }
 
               ++it;
             }
@@ -162,6 +169,13 @@ createSceneMenu(QPointF const scenePos)
   return modelMenu;
 }
 
+void
+DataFlowGraphicsScene::
+sortSceneMenu(bool sort)
+{
+  _sortFlag = sort;
+}
+
 
 void
 DataFlowGraphicsScene::