feat: QFileSystemModel

QFileSystemModel（文件系统的模型）的介绍和使用

QtQFileSystemModelEx/ExQFileSystemModel.cpp

@@ -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));
+}

QtQFileSystemModelEx/ExQFileSystemModel.h

@@ -0,0 +1,37 @@
+#ifndef EXQFILESYSTEMMODEL_H
+#define EXQFILESYSTEMMODEL_H
+
+#include <QMainWindow>
+#include <QLabel>
+#include <QCheckBox>
+#include <QFileSystemModel>
+
+namespace Ui {
+class ExQFileSystemModel;
+}
+
+class ExQFileSystemModel : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    explicit ExQFileSystemModel(QWidget *parent = nullptr);
+    ~ExQFileSystemModel();
+
+    void init();                //初始化，以及初始化状态栏
+
+private slots:
+    void on_treeView_clicked(const QModelIndex &index);  //单击treeView，会在状态栏显示当前节点的信息
+
+private:
+    Ui::ExQFileSystemModel *ui;
+
+    QLabel* m_labFileName;       //文件名
+    QLabel* m_labFileSize;       //文件大小
+    QLabel* m_labFileType;       //文件类型
+    QLabel* m_labPath;           //路径
+    QCheckBox* m_chkBoxIsFile;   //当前是否为文件或文件夹
+    QFileSystemModel* m_model;   //设置文件系统的模型
+};
+
+#endif // EXQFILESYSTEMMODEL_H

QtQFileSystemModelEx/ExQFileSystemModel.ui

@@ -0,0 +1,85 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>ExQFileSystemModel</class>
+ <widget class="QMainWindow" name="ExQFileSystemModel">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>1414</width>
+    <height>786</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>ExQFileSystemModel</string>
+  </property>
+  <widget class="QWidget" name="centralWidget">
+   <layout class="QHBoxLayout" name="horizontalLayout_6">
+    <item>
+     <widget class="QSplitter" name="splitter_2">
+      <property name="orientation">
+       <enum>Qt::Horizontal</enum>
+      </property>
+      <widget class="QGroupBox" name="groupBox">
+       <property name="title">
+        <string>Tree View:</string>
+       </property>
+       <layout class="QHBoxLayout" name="horizontalLayout">
+        <item>
+         <widget class="QTreeView" name="treeView"/>
+        </item>
+       </layout>
+      </widget>
+      <widget class="QSplitter" name="splitter">
+       <property name="orientation">
+        <enum>Qt::Vertical</enum>
+       </property>
+       <widget class="QWidget" name="">
+        <layout class="QHBoxLayout" name="horizontalLayout_5">
+         <item>
+          <widget class="QGroupBox" name="groupBox_2">
+           <property name="title">
+            <string>List View:</string>
+           </property>
+           <layout class="QHBoxLayout" name="horizontalLayout_2">
+            <item>
+             <widget class="QListView" name="listView"/>
+            </item>
+           </layout>
+          </widget>
+         </item>
+         <item>
+          <widget class="QGroupBox" name="groupBox_3">
+           <property name="title">
+            <string>Table View:</string>
+           </property>
+           <layout class="QHBoxLayout" name="horizontalLayout_3">
+            <item>
+             <widget class="QTableView" name="tableView"/>
+            </item>
+           </layout>
+          </widget>
+         </item>
+        </layout>
+       </widget>
+       <widget class="QGroupBox" name="groupBox_4">
+        <property name="title">
+         <string>Column View:</string>
+        </property>
+        <layout class="QHBoxLayout" name="horizontalLayout_4">
+         <item>
+          <widget class="QColumnView" name="columnView"/>
+         </item>
+        </layout>
+       </widget>
+      </widget>
+     </widget>
+    </item>
+   </layout>
+  </widget>
+  <widget class="QStatusBar" name="statusBar"/>
+ </widget>
+ <layoutdefault spacing="6" margin="11"/>
+ <resources/>
+ <connections/>
+</ui>

QtQFileSystemModelEx/QtQFileSystemModelEx.pro

@@ -0,0 +1,42 @@
+#-------------------------------------------------
+#
+# Project created by QtCreator 2019-09-14T16:56:30
+#
+#-------------------------------------------------
+
+QT       += core gui
+
+greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+
+TARGET = QtQFileSystemModelEx
+TEMPLATE = app
+
+# The following define makes your compiler emit warnings if you use
+# any feature of Qt which has been marked as 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 you use 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
+
+CONFIG += c++11
+
+SOURCES += \
+        main.cpp \
+        ExQFileSystemModel.cpp
+
+HEADERS += \
+        ExQFileSystemModel.h
+
+FORMS += \
+        ExQFileSystemModel.ui
+
+RC_ICONS += qt.ico
+
+# Default rules for deployment.
+qnx: target.path = /tmp/$${TARGET}/bin
+else: unix:!android: target.path = /opt/$${TARGET}/bin
+!isEmpty(target.path): INSTALLS += target

QtQFileSystemModelEx/main.cpp

@@ -0,0 +1,11 @@
+#include "ExQFileSystemModel.h"
+#include <QApplication>
+
+int main(int argc, char *argv[])
+{
+    QApplication a(argc, argv);
+    ExQFileSystemModel w;
+    w.show();
+
+    return a.exec();
+}

QtQStringListModelEx/ExQStringListModel.cpp

@@ -0,0 +1,14 @@
+#include "ExQStringListModel.h"
+#include "ui_ExQStringListModel.h"
+
+ExQStringListModel::ExQStringListModel(QWidget *parent) :
+    QWidget(parent),
+    ui(new Ui::ExQStringListModel)
+{
+    ui->setupUi(this);
+}
+
+ExQStringListModel::~ExQStringListModel()
+{
+    delete ui;
+}

QtQStringListModelEx/ExQStringListModel.h

@@ -0,0 +1,22 @@
+#ifndef EXQSTRINGLISTMODEL_H
+#define EXQSTRINGLISTMODEL_H
+
+#include <QWidget>
+
+namespace Ui {
+class ExQStringListModel;
+}
+
+class ExQStringListModel : public QWidget
+{
+    Q_OBJECT
+
+public:
+    explicit ExQStringListModel(QWidget *parent = nullptr);
+    ~ExQStringListModel();
+
+private:
+    Ui::ExQStringListModel *ui;
+};
+
+#endif // EXQSTRINGLISTMODEL_H

QtQStringListModelEx/ExQStringListModel.ui

@@ -0,0 +1,20 @@
+<ui version="4.0">
+ <class>ExQStringListModel</class>
+ <widget class="QWidget" name="ExQStringListModel" >
+  <property name="geometry" >
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>400</width>
+    <height>300</height>
+   </rect>
+  </property>
+  <property name="windowTitle" >
+   <string>ExQStringListModel</string>
+  </property>
+ </widget>
+ <layoutDefault spacing="6" margin="11" />
+ <pixmapfunction></pixmapfunction>
+ <resources/>
+ <connections/>
+</ui>

QtQStringListModelEx/QtQStringListModelEx.pro

@@ -0,0 +1,40 @@
+#-------------------------------------------------
+#
+# Project created by QtCreator 2019-09-14T21:36:41
+#
+#-------------------------------------------------
+
+QT       += core gui
+
+greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+
+TARGET = QtQStringListModelEx
+TEMPLATE = app
+
+# The following define makes your compiler emit warnings if you use
+# any feature of Qt which has been marked as 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 you use 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
+
+CONFIG += c++11
+
+SOURCES += \
+        main.cpp \
+        ExQStringListModel.cpp
+
+HEADERS += \
+        ExQStringListModel.h
+
+FORMS += \
+        ExQStringListModel.ui
+
+# Default rules for deployment.
+qnx: target.path = /tmp/$${TARGET}/bin
+else: unix:!android: target.path = /opt/$${TARGET}/bin
+!isEmpty(target.path): INSTALLS += target

QtQStringListModelEx/main.cpp

@@ -0,0 +1,11 @@
+#include "ExQStringListModel.h"
+#include <QApplication>
+
+int main(int argc, char *argv[])
+{
+    QApplication a(argc, argv);
+    ExQStringListModel w;
+    w.show();
+
+    return a.exec();
+}