main.cpp Example File

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 #include <QApplication>
 #include <QDesktopWidget>
 #include <QFileSystemModel>
 #include <QFileIconProvider>
 #include <QTreeView>
 #include <QCommandLineParser>
 #include <QCommandLineOption>

 int main(int argc, char *argv[])
 {
     QApplication app(argc, argv);

     QCoreApplication::setApplicationVersion(QT_VERSION_STR);
     QCommandLineParser parser;
     parser.setApplicationDescription("Qt Dir View Example");
     parser.addHelpOption();
     parser.addVersionOption();
     QCommandLineOption dontUseCustomDirectoryIconsOption("c", "Set QFileIconProvider::DontUseCustomDirectoryIcons");
     parser.addOption(dontUseCustomDirectoryIconsOption);
     parser.addPositionalArgument("directory", "The directory to start in.");
     parser.process(app);
     const QString rootPath = parser.positionalArguments().isEmpty()
         ? QString() : parser.positionalArguments().first();

     QFileSystemModel model;
     model.setRootPath("");
     if (parser.isSet(dontUseCustomDirectoryIconsOption))
         model.iconProvider()->setOptions(QFileIconProvider::DontUseCustomDirectoryIcons);
     QTreeView tree;
     tree.setModel(&model);
     if (!rootPath.isEmpty()) {
         const QModelIndex rootIndex = model.index(QDir::cleanPath(rootPath));
         if (rootIndex.isValid())
             tree.setRootIndex(rootIndex);
     }

     // Demonstrating look and feel features
     tree.setAnimated(false);
     tree.setIndentation(20);
     tree.setSortingEnabled(true);
     const QSize availableSize = QApplication::desktop()->availableGeometry(&tree).size();
     tree.resize(availableSize / 2);
     tree.setColumnWidth(0, tree.width() / 3);

     tree.setWindowTitle(QObject::tr("Dir View"));
     tree.show();

     return app.exec();
 }