1.相关描述

QFileSystemModel与QTreeView、QTableView、QListView的组合，当QTreeView点击发生改变，QTableView和QListView也会发生变化

2.相关界面 

3.相关代码

mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QFileSystemModel>
#include <QFileDialog>
#include <QHeaderView>
#include <QStandardItemModel>
MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    m_model = new QFileSystemModel(this);
    ui->treeView->setModel(m_model);
    ui->listView->setModel(m_model);
    ui->tableView->setModel(m_model);
    m_model->setRootPath(QDir::currentPath());
    // 树形视图与列表视图的信息联动
    connect(ui->treeView, &QTreeView::clicked, ui->listView, &QListView::setRootIndex);
    // 树形视图与表格视图的信息联动
    connect(ui->treeView, &QTreeView::clicked, ui->tableView, &QTableView::setRootIndex);
    this->initHeader();

}

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

void MainWindow::initHeader()
{
    QStringList heardList;//表头
    heardList << "名称" << "大小" << "文件类型" << "修改时间";
    QHeaderView *hearviewTable = new QHeaderView(Qt::Horizontal, this);
    QHeaderView *hearviewTree = new QHeaderView(Qt::Horizontal, this);
    QStandardItemModel* model = new QStandardItemModel(this);
    model->setHorizontalHeaderLabels(heardList);
    hearviewTable->setModel(model);
    hearviewTree->setModel(model);
    hearviewTable->setSectionResizeMode(QHeaderView::Stretch);    //先自适应宽度
    hearviewTable->setSectionResizeMode(0, QHeaderView::ResizeToContents);     //然后设置要根据内容使用宽度的列
    hearviewTree->setSectionResizeMode(QHeaderView::Stretch);    //先自适应宽度
    hearviewTree->setSectionResizeMode(0, QHeaderView::ResizeToContents);     //然后设置要根据内容使用宽度的列
    ui->tableView->setHorizontalHeader(hearviewTable);
    ui->treeView->setHeader(hearviewTree);
}
// 设置根目录
void MainWindow::on_actionSetRootDir_triggered()
{
    QString dir = QFileDialog::getExistingDirectory(this, "选择目录", QDir::currentPath());
    if(dir.isEmpty()){
        return;
    }
    ui->treeView->setRootIndex(m_model->index(dir));
    ui->listView->setRootIndex(m_model->index(dir));
    ui->tableView->setRootIndex(m_model->index(dir));
}
// 显示目录和文件
void MainWindow::on_rBtnShowDirAndFile_clicked()
{
    ui->groupBoxFilter->setEnabled(true);
    m_model->setFilter(QDir::AllDirs | QDir::Files | QDir::NoDotAndDotDot);
}
// 只显示目录
void MainWindow::on_rBtnShowOnlyDir_clicked()
{
    ui->groupBoxFilter->setEnabled(false);
    m_model->setFilter(QDir::AllDirs | QDir::NoDotAndDotDot);
}
// 文件名过滤
void MainWindow::on_chkFileFilter_clicked(bool checked)
{
    ui->comboBox->setEnabled(checked);
    ui->btnApply->setEnabled(checked);
    m_model->setNameFilterDisables(!checked);
}
// 应用
void MainWindow::on_btnApply_clicked()
{
    QStringList filter = ui->comboBox->currentText().trimmed().split(";", Qt::SkipEmptyParts);
    m_model->setNameFilters(filter);
}
// 显示底部状态
void MainWindow::on_treeView_clicked(const QModelIndex &index)
{
    ui->labFileDir->setText(m_model->fileName(index));
    ui->labFilePath->setText(m_model->filePath(index));
    ui->labFileType->setText(m_model->type(index));
    ui->chkNodeDir->setEnabled(m_model->isDir(index));
    ui->chkNodeDir->setChecked(m_model->isDir(index));
    int sz = m_model->size(index)/1024;
    if(sz < 1024){
        ui->labFileSize->setText(QString("%1 Kb").arg(sz));
    } else {
        ui->labFileSize->setText(QString::asprintf("%.1f MB", sz/1024.0));
    }
}