QT 视图（view）模型（model）汇总

QStringListModel和QListView

UI界面

widget头文件

#ifndef WIDGET_H
#define WIDGET_H

#include <QStringList>
#include <QStringListModel>
#include <QWidget>

QT_BEGIN_NAMESPACE
namespace Ui {
class Widget;
}
QT_END_NAMESPACE

class Widget : public QWidget {
    Q_OBJECT

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

private slots:
    void on_pushButton_clicked();

    void on_pushButton_2_clicked();

    void on_checkBox_clicked(bool checked);

    void on_pushButton_3_clicked();

    void on_pushButton_4_clicked();

    void on_pushButton_5_clicked();

    void on_pushButton_6_clicked();

    void on_pushButton_8_clicked(bool checked);

    void on_pushButton_9_clicked();

    void on_pushButton_10_clicked();

    void on_listView_clicked(const QModelIndex& index);

private:
    Ui::Widget* ui;
    QStringList m_strList;
    QStringListModel* m_model;
};
#endif // WIDGET_H

widget.cpp

#include "widget.h"
#include "ui_widget.h"
#include <QStandardItemModel>>
Widget::Widget(QWidget* parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);
    m_strList << "北京"
              << "上海"
              << "山西"
              << "南京";
    m_model = new QStringListModel(this);
    m_model->setStringList(m_strList);
    ui->listView->setModel(m_model);
    ui->listView->setEditTriggers(QAbstractItemView::EditTrigger::DoubleClicked | QAbstractItemView::EditTrigger::SelectedClicked);
}

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

void Widget::on_pushButton_clicked()
{
    m_model->setStringList(m_strList);
}

void Widget::on_pushButton_2_clicked()
{
    m_model->removeRows(0, m_model->rowCount()); //删除行
}

void Widget::on_checkBox_clicked(bool checked)
{
    if (checked) {
        ui->listView->setEditTriggers(QAbstractItemView::EditTrigger::DoubleClicked | QAbstractItemView::EditTrigger::SelectedClicked);

    } else {
        ui->listView->setEditTriggers(QAbstractItemView::EditTrigger::NoEditTriggers);
    }
}

void Widget::on_pushButton_3_clicked()
{
    qDebug() << "行数" << m_model->rowCount();
    m_model->insertRow(m_model->rowCount()); //插入了行
    qDebug() << "插入后,行数" << m_model->rowCount();

    QModelIndex index = m_model->index(m_model->rowCount() - 1);

    m_model->setData(index, "new item", Qt::DisplayRole);

    ui->listView->setCurrentIndex(index);
}

void Widget::on_pushButton_4_clicked()
{
    QModelIndex index = ui->listView->currentIndex();
    m_model->insertRow(index.row()); //可以插入行
    //    m_model->insertRows(index.row(), 0); //会把行给换掉

    m_model->setData(index, "insert item", Qt::DisplayRole);
}

void Widget::on_pushButton_5_clicked()
{
    QModelIndex index;
    int curRow = ui->listView->currentIndex().row();
    m_model->moveRow(index, curRow, index, curRow - 1);
}

void Widget::on_pushButton_6_clicked()
{
    QModelIndex index;
    int curRow = ui->listView->currentIndex().row();
    m_model->moveRow(index, curRow, index, curRow + 2); //下移需要加2 ,因为两个行号的号,程序会进行自动调整
}

void Widget::on_pushButton_8_clicked(bool checked)
{
    if (checked) {
        m_model->sort(0, Qt::SortOrder::AscendingOrder); //升序
    } else {
        m_model->sort(0, Qt::SortOrder::DescendingOrder); //降序
    }
}

void Widget::on_pushButton_9_clicked()
{
    ui->plainTextEdit->clear();
}

void Widget::on_pushButton_10_clicked()
{
    ui->plainTextEdit->clear();
    QStringList tempList = m_model->stringList();
    for (int i = 0; i < tempList.count(); i++) {
        ui->plainTextEdit->appendPlainText(tempList.at(i));
    }
}

void Widget::on_listView_clicked(const QModelIndex& index)
{
    QString str = QString::asprintf("模型索引: row %d,column = %d", index.row(), index.column());
    qDebug() << str;
    qDebug() << m_model->data(index, Qt::DisplayRole);
}

 ui_widget.h

/********************************************************************************
** Form generated from reading UI file 'widget.ui'
**
** Created by: Qt User Interface Compiler version 6.3.1
**
** WARNING! All changes made in this file will be lost when recompiling UI file!
********************************************************************************/

#ifndef UI_WIDGET_H
#define UI_WIDGET_H

#include <QtCore/QVariant>
#include <QtWidgets/QApplication>
#include <QtWidgets/QCheckBox>
#include <QtWidgets/QGridLayout>
#include <QtWidgets/QGroupBox>
#include <QtWidgets/QListView>
#include <QtWidgets/QPlainTextEdit>
#include <QtWidgets/QPushButton>
#include <QtWidgets/QSplitter>
#include <QtWidgets/QVBoxLayout>
#include <QtWidgets/QWidget>

QT_BEGIN_NAMESPACE

class Ui_Widget
{
public:
    QVBoxLayout *verticalLayout_2;
    QSplitter *splitter;
    QGroupBox *groupBox;
    QGridLayout *gridLayout;
    QCheckBox *checkBox;
    QPushButton *pushButton_4;
    QPushButton *pushButton_3;
    QListView *listView;
    QPushButton *pushButton;
    QPushButton *pushButton_5;
    QPushButton *pushButton_2;
    QPushButton *pushButton_8;
    QPushButton *pushButton_7;
    QPushButton *pushButton_6;
    QGroupBox *groupBox_2;
    QVBoxLayout *verticalLayout;
    QPushButton *pushButton_9;
    QPushButton *pushButton_10;
    QPlainTextEdit *plainTextEdit;

    void setupUi(QWidget *Widget)
    {
        if (Widget->objectName().isEmpty())
            Widget->setObjectName(QString::fromUtf8("Widget"));
        Widget->resize(800, 600);
        verticalLayout_2 = new QVBoxLayout(Widget);
        verticalLayout_2->setObjectName(QString::fromUtf8("verticalLayout_2"));
        splitter = new QSplitter(Widget);
        splitter->setObjectName(QString::fromUtf8("splitter"));
        splitter->setOrientation(Qt::Horizontal);
        groupBox = new QGroupBox(splitter);
        groupBox->setObjectName(QString::fromUtf8("groupBox"));
        gridLayout = new QGridLayout(groupBox);
        gridLayout->setObjectName(QString::fromUtf8("gridLayout"));
        checkBox = new QCheckBox(groupBox);
        checkBox->setObjectName(QString::fromUtf8("checkBox"));
        checkBox->setChecked(true);
        checkBox->setTristate(false);

        gridLayout->addWidget(checkBox, 0, 2, 1, 1);

        pushButton_4 = new QPushButton(groupBox);
        pushButton_4->setObjectName(QString::fromUtf8("pushButton_4"));

        gridLayout->addWidget(pushButton_4, 1, 1, 1, 1);

        pushButton_3 = new QPushButton(groupBox);
        pushButton_3->setObjectName(QString::fromUtf8("pushButton_3"));

        gridLayout->addWidget(pushButton_3, 1, 0, 1, 1);

        listView = new QListView(groupBox);
        listView->setObjectName(QString::fromUtf8("listView"));

        gridLayout->addWidget(listView, 3, 0, 1, 3);

        pushButton = new QPushButton(groupBox);
        pushButton->setObjectName(QString::fromUtf8("pushButton"));

        gridLayout->addWidget(pushButton, 0, 0, 1, 1);

        pushButton_5 = new QPushButton(groupBox);
        pushButton_5->setObjectName(QString::fromUtf8("pushButton_5"));

        gridLayout->addWidget(pushButton_5, 2, 0, 1, 1);

        pushButton_2 = new QPushButton(groupBox);
        pushButton_2->setObjectName(QString::fromUtf8("pushButton_2"));

        gridLayout->addWidget(pushButton_2, 0, 1, 1, 1);

        pushButton_8 = new QPushButton(groupBox);
        pushButton_8->setObjectName(QString::fromUtf8("pushButton_8"));
        pushButton_8->setCheckable(true);
        pushButton_8->setChecked(false);

        gridLayout->addWidget(pushButton_8, 2, 2, 1, 1);

        pushButton_7 = new QPushButton(groupBox);
        pushButton_7->setObjectName(QString::fromUtf8("pushButton_7"));

        gridLayout->addWidget(pushButton_7, 1, 2, 1, 1);

        pushButton_6 = new QPushButton(groupBox);
        pushButton_6->setObjectName(QString::fromUtf8("pushButton_6"));

        gridLayout->addWidget(pushButton_6, 2, 1, 1, 1);

        splitter->addWidget(groupBox);
        groupBox_2 = new QGroupBox(splitter);
        groupBox_2->setObjectName(QString::fromUtf8("groupBox_2"));
        verticalLayout = new QVBoxLayout(groupBox_2);
        verticalLayout->setObjectName(QString::fromUtf8("verticalLayout"));
        pushButton_9 = new QPushButton(groupBox_2);
        pushButton_9->setObjectName(QString::fromUtf8("pushButton_9"));

        verticalLayout->addWidget(pushButton_9);

        pushButton_10 = new QPushButton(groupBox_2);
        pushButton_10->setObjectName(QString::fromUtf8("pushButton_10"));

        verticalLayout->addWidget(pushButton_10);

        plainTextEdit = new QPlainTextEdit(groupBox_2);
        plainTextEdit->setObjectName(QString::fromUtf8("plainTextEdit"));

        verticalLayout->addWidget(plainTextEdit);

        splitter->addWidget(groupBox_2);

        verticalLayout_2->addWidget(splitter);


        retranslateUi(Widget);

        QMetaObject::connectSlotsByName(Widget);
    } // setupUi

    void retranslateUi(QWidget *Widget)
    {
        Widget->setWindowTitle(QCoreApplication::translate("Widget", "Widget", nullptr));
        groupBox->setTitle(QCoreApplication::translate("Widget", "1", nullptr));
        checkBox->setText(QCoreApplication::translate("Widget", "\345\205\201\350\256\270\347\274\226\350\276\221", nullptr));
        pushButton_4->setText(QCoreApplication::translate("Widget", "\346\217\222\345\205\245\351\241\271", nullptr));
        pushButton_3->setText(QCoreApplication::translate("Widget", "\346\267\273\345\212\240\351\241\271", nullptr));
        pushButton->setText(QCoreApplication::translate("Widget", "\346\201\242\345\244\215\345\210\227\350\241\250", nullptr));
        pushButton_5->setText(QCoreApplication::translate("Widget", "\344\270\212\347\247\273", nullptr));
        pushButton_2->setText(QCoreApplication::translate("Widget", "\346\270\205\351\231\244\345\210\227\350\241\250", nullptr));
        pushButton_8->setText(QCoreApplication::translate("Widget", "\346\216\222\345\272\217", nullptr));
        pushButton_7->setText(QCoreApplication::translate("Widget", "\345\210\240\351\231\244\351\241\271", nullptr));
        pushButton_6->setText(QCoreApplication::translate("Widget", "\344\270\213\347\247\273", nullptr));
        groupBox_2->setTitle(QCoreApplication::translate("Widget", "2", nullptr));
        pushButton_9->setText(QCoreApplication::translate("Widget", "\346\270\205\347\251\272\346\226\207\346\234\254", nullptr));
        pushButton_10->setText(QCoreApplication::translate("Widget", "\346\230\276\347\244\272\346\225\260\346\215\256\346\250\241\345\236\213", nullptr));
    } // retranslateUi

};

namespace Ui {
    class Widget: public Ui_Widget {};
} // namespace Ui

QT_END_NAMESPACE

#endif // UI_WIDGET_H

QTableview和QStandItemModel

UI界面

 mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QFile>
#include <QFileDialog>
#include <QItemSelectionModel>
#include <QRegularExpression>
#include <QStringList>
MainWindow::MainWindow(QWidget* parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    labCurFile = new QLabel("当前文件", this);
    labCurFile->setMinimumWidth(200);
    labCellPos = new QLabel("当前单元格", this);
    labCellPos->setMinimumWidth(200);

    labCellText = new QLabel("单元格内容", this);
    labCellText->setMinimumWidth(200);

    ui->statusbar->addWidget(labCurFile);
    ui->statusbar->addWidget(labCellPos);
    ui->statusbar->addWidget(labCellText);

    m_model = new QStandardItemModel(2, FixedColumnCount, this);

    m_selection = new QItemSelectionModel(m_model, this);
    ui->tableView->setModel(m_model); //设置模型
    ui->tableView->setSelectionModel(m_selection); //设置选择的模型
    ui->tableView->setSelectionMode(QAbstractItemView::ExtendedSelection); //设置选择的方式
    ui->tableView->setSelectionBehavior(QAbstractItemView::SelectItems); //设置选择行为
    connect(m_selection, &QItemSelectionModel::currentChanged, this, &MainWindow::do_currentChanged);
}

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

void MainWindow::initModelData(QStringList& list)
{
    int rowCount = list.size();
    qDebug() << "行数" << rowCount;
    m_model->setRowCount(rowCount - 1); //设置行数减一
    QString header = list.at(0);
    //通过正则表达式将数据分开
    QStringList headList = header.split(QRegularExpression(R"(\s+)"), Qt::SkipEmptyParts); // \s+匹配空字符
    m_model->setHorizontalHeaderLabels(headList);
    qDebug() << headList;
    QStandardItem* item;
    int j;
    for (int i = 1; i < rowCount; i++) {
        QString alineText = list.at(i);
        QStringList tempList = header.split(QRegularExpression(R"(\s+)"), Qt::SkipEmptyParts); // \s+匹配空字符
        for (j = 0; j < FixedColumnCount - 1; j++) {
            item = new QStandardItem(headList.at(j));
            m_model->setItem(i - 1, j, item);
        }
        item = new QStandardItem(list.at(j));
        item->setCheckable(true);
        item->setBackground(QBrush(Qt::yellow));
        if (tempList.at(j) == "0") {
            item->setCheckState(Qt::CheckState::Unchecked);
        } else {
            item->setCheckState(Qt::CheckState::Checked);
        }
    }
}

void MainWindow::do_currentChanged(const QModelIndex& current, const QModelIndex& previous)
{
    Q_UNUSED(previous); //消除没有使用过的警告
    //当前改变触发
    qDebug() << "改变:" << previous.row() << previous.column(); //上次的位置
    if (current.isValid()) {
        labCellPos->setText(QString::fromStdString("当前单元格:%1行,%2列").arg(current.row()).arg(current.column()));
        QStandardItem* item = m_model->itemFromIndex(current);
        labCellText->setText("单元格内容: " + item->text());
        ui->pushButton_9->setChecked(item->font().bold());
    }
}

void MainWindow::on_pushButton_clicked()
{
    QString curPath = QCoreApplication::applicationDirPath(); //获取当前应用程序的路径
    QString fileName = QFileDialog::getOpenFileName(this, "打开文件", "./", "数据文件(*.txt);;所有文件(*.*)");

    if (fileName.isEmpty())
        return;
    //不为空
    qDebug() << fileName;
    QFile f = QFile(fileName);
    if (!f.open(QIODevice::ReadOnly | QIODevice::Text))
        return;
    QStringList list;
    ui->plainTextEdit->clear();
    QTextStream astream(&f); //设置文件数据流,传入的是文本流
    while (!astream.atEnd()) {
        QString str = astream.readLine();
        ui->plainTextEdit->appendPlainText(str);
        list.append(str);
    }
    f.close();

    //    qDebug() << "加载完成" << list;
    labCurFile->setText("当前文件:" + fileName);
    ui->btn_add->setEnabled(true);
    ui->btn_insert->setEnabled(true);
    ui->btn_remove->setEnabled(true);
    initModelData(list);
}

void MainWindow::on_pushButton_2_clicked()
{
    ui->plainTextEdit->clear();
    //处理表头
    QStandardItem* aitem;
    QString str;
    for (int i = 0; i < m_model->columnCount(); ++i) {
        aitem = m_model->horizontalHeaderItem(i);
        str += aitem->text();
        str += '\t';
    }
    ui->plainTextEdit->appendPlainText(str);

    //处理内容
}

void MainWindow::on_btn_add_clicked()
{
    QList<QStandardItem*> list;
    QStandardItem* aitem;
    for (int i = 0; i < m_model->columnCount() - 1; ++i) {
        aitem = new QStandardItem("0");
        list << aitem;
    }
    QString str = m_model->headerData(m_model->columnCount() - 1, Qt::Horizontal).toString();
    aitem = new QStandardItem(str);
    aitem->setCheckable(true);
    aitem->setBackground(QBrush(Qt::yellow));

    list << aitem;
    m_model->insertRow(m_model->rowCount(), list);

    m_selection->clearSelection();
    m_selection->setCurrentIndex(m_model->index(m_model->rowCount() - 1, 0), QItemSelectionModel::Select); //选中
}

void MainWindow::on_btn_insert_clicked()
{
    QList<QStandardItem*> list;
    QModelIndex index;
    QStandardItem* aitem;
    for (int i = 0; i < m_model->columnCount() - 1; ++i) {
        aitem = new QStandardItem("1");
        list << aitem;
    }
    QString str = m_model->headerData(m_model->columnCount() - 1, Qt::Horizontal).toString();
    aitem = new QStandardItem(str);
    aitem->setCheckable(true);
    aitem->setBackground(QBrush(Qt::yellow));

    list << aitem;
    index = m_selection->currentIndex();
    m_model->insertRow(index.row(), list);

    m_selection->clearSelection();
    m_selection->setCurrentIndex(index, QItemSelectionModel::Select); //选中
}

void MainWindow::on_btn_remove_clicked()
{
    QModelIndex index = m_selection->currentIndex();
    //    m_model->setRowCount(m_model->rowCount());
    qDebug() << "当前行" << index.row();
    qDebug() << "行总数" << m_model->rowCount() - 1;

    if (index.row() != m_model->rowCount() - 1) {
        m_model->removeRow(index.row());

        m_selection->setCurrentIndex(index, QItemSelectionModel::Select);
    } else {
        m_model->removeRow(index.row());
    }
}

void MainWindow::on_pushButton_6_clicked()
{
    if (!m_selection->hasSelection())
        return;
    QModelIndexList indexList = m_selection->selectedIndexes();
    for (auto index : indexList) {
        m_model->itemFromIndex(index)->setTextAlignment(Qt::AlignLeft | Qt::AlignVCenter);
    }
}

void MainWindow::on_pushButton_8_clicked()
{
    if (!m_selection->hasSelection())
        return;
    QModelIndexList indexList = m_selection->selectedIndexes();
    for (auto index : indexList) {
        m_model->itemFromIndex(index)->setTextAlignment(Qt::AlignCenter | Qt::AlignVCenter);
    }
}

void MainWindow::on_pushButton_7_clicked()
{
    if (!m_selection->hasSelection())
        return;
    QModelIndexList indexList = m_selection->selectedIndexes();
    for (auto index : indexList) {
        m_model->itemFromIndex(index)->setTextAlignment(Qt::AlignRight | Qt::AlignVCenter);
    }
}

void MainWindow::on_pushButton_9_clicked(bool checked)
{
    if (!m_selection->hasSelection())
        return;
    QModelIndexList indexList = m_selection->selectedIndexes();
    for (auto index : indexList) {
        //        QFont font = m_model->itemFromIndex(index)->font();
        //        font.setBold(checked);
        //        m_model->itemFromIndex(index)->setFont(font);
        QFont f;
        f.setBold(checked);
        m_model->itemFromIndex(index)->setFont(f);
    }
}

mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QItemSelectionModel>
#include <QLabel>
#include <QMainWindow>
#include <QModelIndex>
#include <QStandardItem>
#include <QStandardItemModel>
QT_BEGIN_NAMESPACE
namespace Ui {
class MainWindow;
}
QT_END_NAMESPACE

class MainWindow : public QMainWindow {
    Q_OBJECT

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

private:
    Ui::MainWindow* ui;
    QLabel* labCurFile;
    QLabel* labCellPos;
    QLabel* labCellText;
    const int FixedColumnCount = 6;
    QStandardItemModel* m_model;
    QItemSelectionModel* m_selection;
    void initModelData(QStringList& lsit);
private slots:
    void do_currentChanged(const QModelIndex& current, const QModelIndex& previous);
    void on_pushButton_clicked();
    void on_pushButton_2_clicked();
    void on_btn_add_clicked();
    void on_btn_insert_clicked();
    void on_btn_remove_clicked();
    void on_pushButton_6_clicked();
    void on_pushButton_8_clicked();
    void on_pushButton_7_clicked();
    void on_pushButton_9_clicked(bool checked);
};
#endif // MAINWINDOW_H

QFileSystemModel模型

UI界面

 mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QFileDialog>
#include <QListView>
#include <QTableView>
#include <QTreeView>
MainWindow::MainWindow(QWidget* parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    model = new QFileSystemModel(this);
    ui->treeView->setModel(model);
    ui->listView->setModel(model);
    ui->tableView->setModel(model);
    model->setRootPath("./"); //需要设置结构目录 并不会改他自己的结构 QDir::currentPath() 不可以没有这行,作用是激活
    ui->treeView->setRootIndex(model->index(QDir::currentPath())); //需要这样设置才会改变真正的位置
    connect(ui->treeView, &QTreeView::clicked, ui->listView, &QListView::setRootIndex); //树结构点击,设置数结构点
    connect(ui->treeView, &QTreeView::clicked, ui->tableView, &QTableView::setRootIndex);
}

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

void MainWindow::on_action_root_triggered()
{
    //设置根目录
    QString dir = QFileDialog::getExistingDirectory(this, "获取目录", "./");
    qDebug() << dir;
    if (dir.isEmpty())
        return;

    ui->listView->setRootIndex(model->index(dir)); //设置目录
    ui->tableView->setRootIndex(model->index(dir));
    ui->treeView->setRootIndex(model->index(dir));
}

void MainWindow::on_radioButton_clicked()
{
    //显示目录和文件
    model->setFilter(QDir::Filter::Files | QDir::Filter::AllDirs | QDir::NoDotAndDotDot);
    ui->frame_2->setEnabled(true);
}

void MainWindow::on_radioButton_2_clicked()
{
    //只显示目录
    model->setFilter(QDir::Filter::AllDirs | QDir::NoDotAndDotDot);
    ui->frame_2->setEnabled(false);
}

void MainWindow::on_checkBox_clicked(bool checked)
{

    ui->comboBox_1->setEnabled(checked);
    ui->pushButton->setEnabled(checked);
    model->setNameFilterDisables(!checked);
}

void MainWindow::on_pushButton_clicked()
{
    QStringList strlist = ui->comboBox_1->currentText().trimmed().split(";", Qt::SkipEmptyParts); //去掉两边空格,在按照;进行分割,不要空字符
    qDebug() << strlist;
    model->setNameFilters(strlist);
}

void MainWindow::on_treeView_clicked(const QModelIndex& index)
{
    ui->label_file->setText(model->fileName(index));
    ui->label_path->setText(model->filePath(index));
    ui->label_type->setText(model->type(index));
    ui->checkBox_check->setChecked(model->isDir(index));
    int sz = model->size(index);
    if (sz < 1024) {
        ui->label_size->setText(QString("%1 KB").arg(sz));

    } else {
        //        ui->label_size->setText(QString("%1 mb").arg(sz / 1024.0)); //不能设置小数点位数显示
        ui->label_size->setText(QString::asprintf("%.1f mb", sz / 1024.0)); //可以设置打印自定义格式
    }
}

mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QFileSystemModel>
#include <QMainWindow>

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_action_root_triggered();

    void on_radioButton_clicked();

    void on_radioButton_2_clicked();

    void on_checkBox_clicked(bool checked);

    void on_pushButton_clicked();

    void on_treeView_clicked(const QModelIndex& index);

private:
    Ui::MainWindow* ui;
    QFileSystemModel* model;
};
#endif // MAINWINDOW_H

总结

一般来说，设置视图模型的对应关系时，会给QTableView设置两个模型，一个是

QStandardItemModel 用于设置一些基本的数据信息，另一个是选择的模型

QItemSelectionModel 用于判断选中单元格的具体位置，几行几列，根据这个模型可以获取到数据。

定制窗口

ui文件

 mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include "tdialoglocate.h"

#include "tdialogheader.h"
#include "tdialogsize.h"
#include <QItemSelectionModel>
#include <QLabel>
#include <QMainWindow>
#include <QStandardItemModel>
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_action_row_column_triggered();

    void on_action_title_triggered();

    void on_action_cell_triggered();
    void do_setCellText(int row, int col, QString& text);

    void on_tableView_clicked(const QModelIndex& index);
    void do_model_currentchanged(QModelIndex current, QModelIndex previous);

signals:
    void cellIndexChanged(int row, int column);

private:
    Ui::MainWindow* ui;
    TDialogSize* tdialogsize;
    QStandardItemModel* m_model;
    QItemSelectionModel* m_selection;
    TDialogHeader* tdialogheader = nullptr;
    TDialogLocate* tdialoglocate;
    QLabel* labelcellpos;
    QLabel* labeltext;
};
#endif // MAINWINDOW_H

mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QItemSelectionModel>
MainWindow::MainWindow(QWidget* parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    m_model = new QStandardItemModel(4, 4, this);
    QStringList headers;
    headers << "姓名"
            << "性别"
            << "学号"
            << "部门";
    m_model->setHorizontalHeaderLabels(headers);
    m_selection = new QItemSelectionModel(m_model);

    ui->tableView->setModel(m_model);
    ui->tableView->setSelectionModel(m_selection);

    this->setCentralWidget(ui->tableView);
    labelcellpos = new QLabel("当前单元格:", this);
    labelcellpos->setMinimumWidth(200);
    labeltext = new QLabel("当前文本:", this);
    labeltext->setMinimumWidth(200);
    ui->statusbar->addWidget(labelcellpos);
    ui->statusbar->addWidget(labeltext);
    connect(m_selection, &QItemSelectionModel::currentChanged, this, &MainWindow::do_model_currentchanged);
}

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

void MainWindow::on_action_row_column_triggered()
{
    tdialogsize = new TDialogSize(this);
    tdialogsize->setWindowFlag(Qt::MSWindowsFixedSizeDialogHint); //设置固定的大小

    tdialogsize->setRowColumn(m_model->rowCount(), m_model->columnCount());
    int ret = tdialogsize->exec(); // 1是接收 0是拒绝
    if (ret == QDialog::Accepted) {
        m_model->setColumnCount(tdialogsize->columnCount());
        m_model->setRowCount(tdialogsize->rowCount());
    }

    delete tdialogsize;
}

void MainWindow::on_action_title_triggered()
{
    if (tdialogheader == nullptr) {
        tdialogheader = new TDialogHeader(this);
    }
    QStringList strlist;
    for (int i = 0; i < m_model->columnCount(); i++) {
        strlist.append(m_model->headerData(i, Qt::Orientation::Horizontal, Qt::DisplayRole).toString()); //添加头部数据,在水平
    }
    tdialogheader->setHeaderList(strlist);

    int ret = tdialogheader->exec();
    if (ret == QDialog::Accepted) {
        strlist = tdialogheader->headerList();
        m_model->setHorizontalHeaderLabels(strlist);
    }
}

void MainWindow::on_action_cell_triggered()
{
    tdialoglocate = new TDialogLocate(this);
    tdialoglocate->setAttribute(Qt::WA_DeleteOnClose, true); //关闭时,自动删除
    tdialoglocate->setWindowFlag(Qt::WindowType::WindowStaysOnTopHint); //窗口始终在上面显示
    //初始化对话框
    tdialoglocate->setSpinRange(m_model->rowCount(), m_model->columnCount());
    QModelIndex index = m_selection->currentIndex();
    if (index.isValid()) {
        qDebug() << "index = " << index.row() << " " << index.column();
        tdialoglocate->setSpinValue(index.row(), index.column());
    }
    connect(tdialoglocate, &TDialogLocate::changeCellText, this, &MainWindow::do_setCellText);
    connect(tdialoglocate, &TDialogLocate::changeActionEnable, ui->action_cell, &QAction::setEnabled);

    connect(this, &MainWindow::cellIndexChanged, tdialoglocate, &TDialogLocate::setSpinValue);

    tdialoglocate->show();
}

void MainWindow::do_setCellText(int row, int col, QString& text)
{
    QModelIndex index = m_model->index(row, col);
    m_selection->clearSelection();
    m_selection->setCurrentIndex(index, QItemSelectionModel::SelectionFlag::Select);
    m_model->setData(index, text);
}

void MainWindow::on_tableView_clicked(const QModelIndex& index)
{
    qDebug() << "点击了" << index.row() << " " << index.column();
    emit cellIndexChanged(index.row(), index.column());
}

void MainWindow::do_model_currentchanged(QModelIndex current, QModelIndex previous)
{
    if (current.isValid()) {
        labelcellpos->setText(QString::asprintf("当前单元格是:%d行 %d列", current.row(), current.column()));
    }
    QStandardItem* model = m_model->itemFromIndex(current); //根据索引取item
    labeltext->setText("单元格内容: " + model->text());
}

tdialogheader.h

#ifndef TDIALOGHEADER_H
#define TDIALOGHEADER_H

#include <QDialog>
#include <QStringList>
#include <QStringListModel>

namespace Ui {
class TDialogHeader;
}

class TDialogHeader : public QDialog {
    Q_OBJECT

public:
    explicit TDialogHeader(QWidget* parent = nullptr);
    ~TDialogHeader();
    void setHeaderList(QStringList& headers);
    QStringList headerList();

private:
    Ui::TDialogHeader* ui;
    QStringListModel* m_model;
};

#endif // TDIALOGHEADER_H

tdialogheader.cpp

#include "tdialogheader.h"
#include "ui_tdialogheader.h"

TDialogHeader::TDialogHeader(QWidget* parent)
    : QDialog(parent)
    , ui(new Ui::TDialogHeader)
{
    ui->setupUi(this);
    m_model = new QStringListModel(this);
    ui->listView->setModel(m_model);
}

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

void TDialogHeader::setHeaderList(QStringList& headers)
{
    m_model->setStringList(headers); // QStringList模型设置标头
}

QStringList TDialogHeader::headerList()
{
    return m_model->stringList();
}

后续代码就不贴了，需要联系 文章来源地址https://www.toymoban.com/news/detail-611685.html

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