added new node auto-positioning for items

app/project/item/folder/folder.cpp

@@ -115,10 +115,16 @@ void Folder::InputDisconnectedEvent(const QString &input, int element, const Nod
 FolderAddChild::FolderAddChild(Folder *folder, Node *child, bool autoposition) :
   folder_(folder),
   child_(child),
-  autoposition_(autoposition)
+  autoposition_(autoposition),
+  position_command_(nullptr)
 {
 }
 
+FolderAddChild::~FolderAddChild()
+{
+  delete position_command_;
+}
+
 Project *FolderAddChild::GetRelevantProject() const
 {
   return folder_->project();
@@ -129,10 +135,22 @@ void FolderAddChild::redo()
   int array_index = folder_->InputArraySize(Folder::kChildInput);
   folder_->InputArrayAppend(Folder::kChildInput, false);
   Node::ConnectEdge(child_, NodeInput(folder_, Folder::kChildInput, array_index));
+
+  if (autoposition_) {
+    old_position_ = child_->GetPosition();
+    if (!position_command_) {
+      position_command_ = new NodeSetPositionAsChildCommand(child_, folder_, array_index, array_index+1, true);
+    }
+    position_command_->redo();
+  }
 }
 
 void FolderAddChild::undo()
 {
+  if (position_command_) {
+    position_command_->undo();
+  }
+
   Node::DisconnectEdge(child_, NodeInput(folder_, Folder::kChildInput, folder_->InputArraySize(Folder::kChildInput)-1));
   folder_->InputArrayRemoveLast(Folder::kChildInput);
 }

app/project/item/folder/folder.h

@@ -160,6 +160,8 @@ class FolderAddChild : public UndoCommand
 public:
   FolderAddChild(Folder* folder, Node* child, bool autoposition = true);
 
+  virtual ~FolderAddChild() override;
+
   virtual Project * GetRelevantProject() const override;
 
   virtual void redo() override;
@@ -175,6 +177,8 @@ private:
 
   QPointF old_position_;
 
+  NodeSetPositionAsChildCommand* position_command_;
+
 };
 
 }

app/project/project.cpp

@@ -39,16 +39,20 @@ Project::Project() :
   // Adds a color manager "node" to this project so that it synchronizes
   color_manager_ = new ColorManager();
   color_manager_->setParent(this);
+  color_manager_->SetPosition(QPointF(1, 0));
   AddDefaultNode(color_manager_);
 
   // Same with project settings
   settings_ = new ProjectSettingsNode();
   settings_->setParent(this);
+  settings_->SetPosition(QPointF(2, 0));
   AddDefaultNode(settings_);
 
   // Viewer node for connecting with the footage viewer
   footage_viewer_ = new ViewerOutput();
   footage_viewer_->setParent(this);
+  footage_viewer_->SetLabel(tr("Footage Viewer"));
+  footage_viewer_->SetPosition(QPointF(3, 0));
   AddDefaultNode(footage_viewer_);
 
   // Folder root for project