Sort System Drives via QSortFilterProxyModel

[Stoned Jesus]

I just want to know which function of QSortFilterProxyModel class is used to sort the local and removable drives in system. Basically I am working on a app where I am using treeview and I need to sort them in a order.

Here is the code:
@pSystemPrimaryModel = new QFileSystemModel(this);
pSystemPrimaryModel->setRootPath(QDir::currentPath());
pSystemPrimaryModel->setFilter( QDir::AllDirs | QDir::NoDotAndDotDot );

// Sets the model for the view to present.
ui->PrimTreeView->setModel(pSystemPrimaryModel);

// Just Display NAME and hide other Columns
for(int nCount = 1; nCount < pSystemPrimaryModel->columnCount(); nCount++)
ui->PrimTreeView->hideColumn(nCount);@

This displays drives in a regular manner as follows:
@Name:

• C:
• New Volume(D:)
• New Volume(E:)
• SD_Card(F:)
• Transcend Drive(G:)@
  Basically I want to display it like follows:
  @+ Local Folder
  • C:
  • New Volume(D:)
  • New Volume(E:)
• Removable Drives
  • SD_Card(F:)
  • Transcend Drive(G:)@