Qt对QTreeView和QFileSystemModel的使用，文件路径返回各种值

相关资料：

https://stackoverflow.com/questions/14962902/qt-adding-own-column-to-qfilesystemmodel     自定义增加列的类

.pro

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

CONFIG += c++11

# The following define makes your compiler emit warnings if you use
# any Qt feature that has been marked deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS

# You can also make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES += 
    main.cpp 
    mainwindow.cpp

HEADERS += 
    mainwindow.h

FORMS += 
    mainwindow.ui

TARGET = ../../QtTreeView/bin/QtTreeView

# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QStandardItemModel>
#include <QDebug>
#include <QMessageBox>
#include <QFileSystemModel>

QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = nullptr);
    ~MainWindow();

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

private:
    Ui::MainWindow *ui;
    QStandardItemModel *m_pModel;
    QFileSystemModel *m_pFileModel;
};
#endif // MAINWINDOW_H

mainwindow.cpp

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

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    setWindowTitle(QStringLiteral("QTreeView和QFileSystemModel的使用"));

    // 隐藏树的头显示用
    ui->treeView->header()->hide();
    // 设置为不可编辑
    ui->treeView->setEditTriggers(QAbstractItemView::NoEditTriggers);
    // 建立一个文件系统模型
    m_pFileModel = new QFileSystemModel(this);
    m_pFileModel->setRootPath(QCoreApplication::applicationDirPath() + "/XML");
    QStringList sNameFilter;
    sNameFilter << "*.txt";
    m_pFileModel->setNameFilterDisables(false);
    m_pFileModel->setNameFilters(sNameFilter);
    ui->treeView->setModel(m_pFileModel);
    ui->treeView->setRootIndex(m_pFileModel->index(QCoreApplication::applicationDirPath() + "/XML"));
    // 隐藏后面三列
    ui->treeView->setColumnHidden(1, true);
    ui->treeView->setColumnHidden(2, true);
    ui->treeView->setColumnHidden(3, true);
}

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

void MainWindow::on_treeView_clicked(const QModelIndex &index)
{
    QString sData;
    QString sDir;
    QString sfilePath;
    QString stype;
    QString sfileName;
    QString sFromatStr = QStringLiteral("data:%1 
isDir:%2 
filePath:%3 
type:%4 
fileName:%5");
    sData = index.data().toString();
    sDir = QString::number(m_pFileModel->isDir(index));
    sfilePath = m_pFileModel->filePath(index);
    stype = m_pFileModel->type(index);
    sfileName = m_pFileModel->fileName(index);

    ui->textEdit->setText("");
    ui->textEdit->append(sFromatStr.arg(sData).arg(sDir).arg(sfilePath).arg(stype).arg(sfileName));
}

PS：自定义文件管理类，增加一列

class yourSystemModel : public QFileSystemModel
{
    Q_OBJECT

    int columnCount(const QModelIndex& parent = QModelIndex()) const
    {
        return QFileSystemModel::columnCount()+1;
    }

    QVariant data(const QModelIndex& index,int role) const
    {
       if(!index.isValid()){return QFileSystemModel::data(index,role);}
       if(index.column()==columnCount()-1)
       {
           switch(role)
           {
              case(Qt::DisplayRole):
                  {return fileInfo(index).fileName();}
              case(Qt::TextAlignmentRole):
                  {return Qt::AlignHCenter;}
              default:{}
           }
       }
       return QFileSystemModel::data(index,role);
   }
};

PS：修改表头名称显示

QStringList headers;
    headers << QString::fromLocal8Bit("文件") << QString::fromLocal8Bit("创建日期")
            << QString::fromLocal8Bit("修改日期") << QString::fromLocal8Bit("文件版本")
            << QString::fromLocal8Bit("战场名称");;

    QStandardItemModel *itemModel =new QStandardItemModel();
        itemModel->setHorizontalHeaderLabels(headers);
        ui->treeView->header()->setModel(itemModel);

PS:更多文件路径操作

    QString file_full;

    QFileInfo fi;

    file_full = QFileDialog::getOpenFileName(this);

    fi = QFileInfo(file_full);

    qDebug() << fi.filePath();

    qDebug() << fi.absoluteFilePath();

    qDebug() << fi.canonicalFilePath();

    qDebug() << fi.fileName();

    qDebug() << fi.baseName();

    qDebug() << fi.completeBaseName();

    qDebug() << fi.suffix();

    qDebug() << fi.bundleName();

    qDebug() << fi.completeSuffix();

    qDebug() << fi.path();

    qDebug() << fi.absolutePath();

    qDebug() << fi.canonicalPath();

    qDebug() << fi.symLinkTarget();

    qDebug() << fi.owner();

    qDebug() << fi.group();

    qDebug() << "----------------";

    qDebug() << fi.dir().path();

    qDebug() << fi.dir().absolutePath();

    qDebug() << fi.dir().canonicalPath();

    qDebug() << fi.dir().dirName();

    qDebug() << fi.dir().dirName();

    qDebug() << fi.dir().currentPath();

    qDebug() << fi.dir().homePath();

    qDebug() << fi.dir().rootPath();

    qDebug() << fi.dir().tempPath();