QFileSystemModel setRootPath

Question

I am attempting to create a Qt application which shows the contents of a folder (“Users” folder in Mac OS). Here is the code:

QFileSystemModel *dirModel = new QFileSystemModel;
dirModel->setRootPath("/Users");

ui->listView->setModel(dirModel);

I also attempted using this code

When i run the application, instead of showing the content of the “/Users” Folder, it shows the root drive (note: not the content of the drive). The folder does exist and i also tried using other folders.

Opine

Did you attempt the code from the question you linked or from its answer ? (I just edited it to make it a little clearer). – Kalagher

I atteempted the code from the Question. I will attempt the answer now – Opine

setRootPath installs a file system watcher on a path to reflect changes. One needs setRootIndex as said in answers below. doc.qt.io/qt-5/qfilesystemmodel.html#setRootPath – Abrams

Answer 1

This code has worked for me as well:

QFileSystemModel *dirModel = new QFileSystemModel(this);
dirModel->setRootPath("/Users");

ui->listView->setModel(dirModel);
ui->listView->setRootIndex(dirModel->setRootPath("/Users"));

Opine

note, dirModel->setRootPath(...) returns a QModelIndex. You can call this once and pass the index into the setRootIndex – Dropsy

Answer 2

Did you try forcing the index to show the directory ?

listView->setRootIndex(dirModel->index("/Users"));

This works fine for me:

#include <QtGui>

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    QFileSystemModel model;
    model.setRootPath("/Users");
    QListView view;
    view.setModel(&model);
    view.setRootIndex(model.index("/Users/"));
    view.show();
    return app.exec();
}

Lucubration

I get an error : QAbstractItemView::setRootIndex failed : index must be from the currently set model – Opine