heuristic to import into selected folder

app/project/project.cpp

@@ -23,6 +23,24 @@
 Project::Project()
 {
   name_ = tr("(untitled)");
+
+  // FIXME: Test code
+  Folder* f1 = new Folder();
+  f1->set_name("F1");
+  f1->set_parent(&root_);
+  Folder* f2 = new Folder();
+  f2->set_name("F2");
+  f2->set_parent(f1);
+  Folder* f3 = new Folder();
+  f3->set_name("F3");
+  f3->set_parent(&root_);
+  Folder* f4 = new Folder();
+  f4->set_name("F4");
+  f4->set_parent(f1);
+  Folder* f5 = new Folder();
+  f5->set_name("F5");
+  f5->set_parent(f3);
+  // End Test code
 }
 
 Folder *Project::root()

app/project/projectviewmodel.cpp

@@ -207,6 +207,24 @@ bool ProjectViewModel::setData(const QModelIndex &index, const QVariant &value,
   return false;
 }
 
+bool ProjectViewModel::canFetchMore(const QModelIndex &parent) const
+{
+  // Check if this is a valid index
+  if (parent.isValid()) {
+    Item* item = GetItemObjectFromIndex(parent);
+
+    // Check if this item is a kFolder type
+    // If it's a folder, we always return TRUE in order to always show the "expand triangle" icon,
+    // even when there are no "physical" children
+    if (item->type() == Item::kFolder) {
+      return true;
+    }
+  }
+
+  // Otherwise, return default behavior
+  return QAbstractItemModel::canFetchMore(parent);
+}
+
 Qt::ItemFlags ProjectViewModel::flags(const QModelIndex &index) const
 {
   if (!index.isValid()) {

app/project/projectviewmodel.h

@@ -84,6 +84,7 @@ public:
   virtual QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const override;
   virtual bool hasChildren(const QModelIndex &parent = QModelIndex()) const override;
   virtual bool setData(const QModelIndex &index, const QVariant &value, int role = Qt::EditRole) override;
+  virtual bool canFetchMore(const QModelIndex &parent) const override;
 
   /** Drag and drop support */
   virtual Qt::ItemFlags flags(const QModelIndex &index) const override;