QFileSystemModel with filter QDir::Files shows not only files, but also opened subfolders

[Maxxii]

Hello. I'm new with Qt and I'm following video tutorial about QFileSystemModel. So, I'm making file explorer with two views - one is displaying only folders (with treeView), the other one shows only files from the folder, selected in first view.
Everything works fine, but if I choose folder with subfolder, click on subfolder, and then click on parent folder - it will show previously selected subfolder in the list, that is supposed to show files only. Not sure if it's bug or I did something wrong.
BTW, I am on Mac, but somebody already asked about same problem in comments (without answer), not sure about his OS.
Here is the code:
Dialog.h

class Dialog : public QDialog
{
    Q_OBJECT

public:
    explicit Dialog(QWidget *parent = 0);
    ~Dialog();

private slots:
    void on_treeView_clicked(const QModelIndex &index);

private:
    Ui::Dialog *ui;
    QFileSystemModel *dirmodel;
    QFileSystemModel *filemodel;
};

Dialog.cpp

Dialog::Dialog(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::Dialog)
{
    ui->setupUi(this);

    QString sPath = "/users/Max/";

    dirmodel = new QFileSystemModel(this);
    dirmodel->setFilter(QDir::NoDotAndDotDot | QDir::AllDirs);
    dirmodel->setRootPath(sPath);
    ui->treeView->setModel(dirmodel);
    QModelIndex index = dirmodel->index(sPath, 0); 
    ui->treeView->setRootIndex(index);

    filemodel = new QFileSystemModel(this);
    filemodel->setFilter(QDir::NoDotAndDotDot | QDir::Files);
    filemodel->setRootPath(sPath);
    ui->listView->setModel(filemodel);
    index = filemodel->index(sPath, 0); 
    ui->listView->setRootIndex(index); 

}

Dialog::~Dialog()
{
    delete ui;
}

void Dialog::on_treeView_clicked(const QModelIndex &index)
{
    QString sPath = dirmodel->fileInfo(index).absoluteFilePath(); 
    ui->listView->setRootIndex(filemodel->setRootPath(sPath)); 

}

[SGaist]

Hi and welcome to devnet,

What version of Qt are you using ?
On what version of macOS ?

[Maxxii]

Hello. I'm using Mac OS 10.13.1 and version of Qt is 5.9.2
I also just tested it on Windows 10 x64 (with Qt 5.9.2) and it has the same issue.

[JonB]

@Maxxii

    QString sPath = dirmodel->fileInfo(index).absoluteFilePath(); 
    ui->listView->setRootIndex(filemodel->setRootPath(sPath));

I don't actually see where http://doc.qt.io/qt-5/qfilesystemmodel.html#setRootPath states what the QModelIndex it returns is. Did you take this code from somewhere?**

** EDIT: Hmm, I see it at http://www.bogotobogo.com/Qt/Qt5_QTreeView_QFileSystemModel_ModelView_MVC.php. And someone said on your youtube that it has same problem. Perhaps an expert can say there is a problem in that code?

[SGaist]

@Maxxii Can you also provide the .ui file for your example ?

[Maxxii]

Sure. But there is nothing more than 1 treeView and 1 listView.

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>Dialog</class>
 <widget class="QDialog" name="Dialog">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>597</width>
    <height>303</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>Dialog</string>
  </property>
  <layout class="QHBoxLayout" name="horizontalLayout">
   <item>
    <widget class="QTreeView" name="treeView"/>
   </item>
   <item>
    <widget class="QListView" name="listView"/>
   </item>
  </layout>
 </widget>
 <layoutdefault spacing="6" margin="11"/>
 <resources/>
 <connections/>
</ui>

[SGaist]

Even if simple, it avoids people trying to help you to have to rewrite it and guess what's in it and thus lose time to re-create a functional application.

So there might be bug here with QFileSystemModel. I'd recommend taking a look at the bug report system to see if it's something known. If not please consider opening a new report providing the complete code sample.

[JonB]

@Maxxii
If this does indeed turn out to be a bug, as @SGaist suggests, and is something to do with changing the root path not quite respecting the filter and showing sub-driectories under some circumstances, to work around for now try something like refreshing or even recreating the filemodel in your on_treeView_clicked(), till it's fixed.

[Maxxii]

@SGaist
Ok. I thought I have to paste minimum amount code on forum, so thank you for clarification.
I wanted to report this as bug, but decided to post it here first, just to be sure it's not about my misunderstanding.

@JNBarchan
Ok, I will try this, thank you.