feat: QFileSystemModel

QFileSystemModel（文件系统的模型）的介绍和使用
2026-10-20 07:21:58 +08:00 · 2019-09-15 00:35:08 +08:00
parent f070d975d5
commit deff6bad43
11 changed files with 350 additions and 0 deletions
@@ -0,0 +1,68 @@
+#include "ExQFileSystemModel.h"
+#include "ui_ExQFileSystemModel.h"
+
+ExQFileSystemModel::ExQFileSystemModel(QWidget *parent) :
+    QMainWindow(parent),
+    ui(new Ui::ExQFileSystemModel)
+{
+    ui->setupUi(this);
+    setWindowTitle(QObject::tr("文件系统模型QFileSystemModel的介绍和使用"));
+
+    init();
+    connect(ui->treeView, &QTreeView::clicked, ui->listView, &QListView::setRootIndex);
+    connect(ui->treeView, &QTreeView::clicked, ui->tableView, &QTableView::setRootIndex);
+}
+
+ExQFileSystemModel::~ExQFileSystemModel()
+{
+    delete ui;
+}
+
+//初始化，以及初始化状态栏
+void ExQFileSystemModel::init()
+{
+    //设置数据模型，且加载到各个视图上面
+    m_model = new QFileSystemModel(this);
+    QString currPath = QDir::currentPath();  //获取当前路径
+    m_model->setRootPath(currPath);          //设置根目录
+    ui->treeView->setModel(m_model);         //设置数据模型
+    ui->listView->setModel(m_model);
+    ui->tableView->setModel(m_model);
+    ui->columnView->setModel(m_model);
+
+    //初始化状态栏
+    m_labFileName = new QLabel("名称：", ui->statusBar);
+    m_labFileName->setMinimumWidth(180);
+    m_labFileSize = new QLabel("大小：", ui->statusBar);
+    m_labFileSize->setFixedWidth(130);
+    m_labFileType = new QLabel("类型：", ui->statusBar);
+    m_labFileType->setFixedWidth(130);
+    m_labPath = new QLabel("路径：" + currPath, ui->statusBar);
+    m_chkBoxIsFile = new QCheckBox("当前为文件夹", ui->statusBar);
+    m_chkBoxIsFile->setFixedWidth(130);
+
+    //各种QLable添加到状态栏
+    ui->statusBar->addWidget(m_labFileName);
+    ui->statusBar->addWidget(m_labFileSize);
+    ui->statusBar->addWidget(m_labFileType);
+    ui->statusBar->addWidget(m_chkBoxIsFile);
+    ui->statusBar->addWidget(m_labPath);
+}
+
+//单击treeView，会在状态栏显示当前节点的信息
+void ExQFileSystemModel::on_treeView_clicked(const QModelIndex &index)
+{
+    m_chkBoxIsFile->setChecked(m_model->isDir(index));                //是否是目录
+    m_labFileName->setText("名称：" + m_model->fileName(index));      //文件名称
+    double size = m_model->size(index) / 1024.0;
+
+    if (size < 1024)
+        m_labFileSize->setText("类型：" + QString::number(size, 'f', 2) + "KB");
+    else if (1024 <= size && size < 1024 * 1024)
+        m_labFileSize->setText("类型：" + QString::number(size / 1024, 'f', 2) + "MB");
+    else
+        m_labFileSize->setText("类型：" + QString::number(size / (1024 * 1024), 'f', 2) + "GB");
+
+    m_labFileType->setText(m_model->type(index));
+    m_labPath->setText(m_model->filePath(index));
+}