Display System Drives in Specific Order in QTreeView

I have a treeview where I am displaying all system drives using QFileSystemModel. I am looking for much better approach where a tree view can display Local Drives in one section, Removable Drive in another and so on.

Here is the code:

Code:

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pSystemPrimaryModel = new QFileSystemModel(this); 
    /* Sets the directory that is being watched by the model to currentPath by installing
       a file system watcher on it. */
    pSystemPrimaryModel->setRootPath(QDir::currentPath());
    pSystemPrimaryModel->setFilter( QDir::AllDirs | QDir::NoDotAndDotDot );   
    // Sets the model for the view to present.
    ui->PrimTreeView->setModel(pSystemPrimaryModel);    
    // Regard less how many columns you can do this using for:
    for(int nCount = nColCount; nCount < pSystemPrimaryModel->columnCount(); nCount++)
       ui->PrimTreeView->hideColumn(nCount);

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It gives me the following:
Attachment 8476
I want to display it like the second picture shown above. How can that be achieved?

Use a proxy model for sorting.

Quote:

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Originally Posted by wysota

Use a proxy model for sorting.

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How do we do that? It will be helpful if you can guide me :)

Quote:

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Originally Posted by owais_blore

How do we do that? It will be helpful if you can guide me :)

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QSortFilterProxyModel

Basically using this, i tried to play around and did something like this:

Code:

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QSortFilterProxyModel *proxyModel = new QSortFilterProxyModel(this);
 proxyModel->setSourceModel(pSystemPrimaryModel);
 
 // Set the QStandardItemModel model of QTreeView to display audio and video files with details
 ui->PrimTreeView->setModel(proxyModel);

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it didnt work..... Looks like I have to use some functions

Since you want to change the order of the drives only, obviously just using a proxy that sorts *everything* will not work. You need to subclass it and reimplement the comparision method taking into consideration *what* you are sorting. And I have no idea why you used QStandardItemModel instead of QFileSystemModel in the last snippet. Maybe that's why it "didn't work" (whatever that means) :)

Well That was a typo from my side. I have used QFileSystemModel only. Looks like I have to re-implement the comparison method.

Quote:

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Originally Posted by wysota

Since you want to change the order of the drives only, obviously just using a proxy that sorts *everything* will not work. You need to subclass it and reimplement the comparision method taking into consideration *what* you are sorting. And I have no idea why you used QStandardItemModel instead of QFileSystemModel in the last snippet. Maybe that's why it "didn't work" (whatever that means) :)

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