mainwindow.cpp

#include "mainwindow.h"
#include "./ui_mainwindow.h"

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

    QString sPath = "C:/";

    dirModel = new QFileSystemModel(this);
    dirModel->setFilter(QDir::NoDotAndDotDot | QDir::AllDirs);
    dirModel->setRootPath(sPath);

    ui->treeView->setModel(dirModel);
    ui->treeView->setColumnHidden(0, false);
    ui->treeView->setColumnHidden(1, true);
    ui->treeView->setColumnHidden(2, true);
    ui->treeView->setColumnHidden(3, true);

    fileModel = new QFileSystemModel(this);
    fileModel->setFilter(QDir::NoDotAndDotDot | QDir::Files);
    fileModel->setRootPath(sPath);
    ui->listView->setModel(fileModel);
}

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


void MainWindow::on_treeView_clicked(const QModelIndex &index)
{
    QString sPath = dirModel->fileInfo(index).absoluteFilePath();
    ui->listView->setRootIndex(fileModel->setRootPath(sPath));
}