Qt项目demo：数据在ui界面上显示，鼠标双击可弹窗显示具体信息

1、RecData.pro

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#-------------------------------------------------
#
# Project created by QtCreator 2022-07-23T15:24:27
#
#-------------------------------------------------

QT       += core gui sql

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = RecData
TEMPLATE = app

#TEMPLATE = lib

#DEFINES += RECDATA_LIBRARY

# 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 \
        RecData.cpp \
        showdata.cpp

HEADERS += \
        RecData.h \
        showdata.h

FORMS += \
        RecData.ui \
        showdata.ui

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

2、RecData.h

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#ifndef RECDATA_H
#define RECDATA_H

#include <QWidget>
#include <QStandardItemModel>
#include <QAbstractItemView>
#include <QPushButton>
#include <QTime>
#include <QSqlRecord>
#include <QDebug>
#include <QMessageBox>
#include <QMouseEvent>
#include <QJsonArray>
#include <QJsonObject>
#include <QJsonDocument>

namespace Ui {
class RecData;
}

class RecData : public QWidget
{
    Q_OBJECT

public:
    explicit RecData(QWidget *parent = nullptr);
    ~RecData();

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

    void on_tableView_clicked(const QModelIndex &index);

private:
    Ui::RecData *ui;

    QModelIndex pindex;
    QString pstr;

//    QStandardItemModel *model;
};

#endif // RECDATA_H

3、RecData.cpp

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#pragma execution_character_set("utf-8")
#include "RecData.h"
#include "ui_RecData.h"
#include "showdata.h"
#include "ui_showdata.h"

QStandardItemModel *model = nullptr;

RecData::RecData(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::RecData)
{
    ui->setupUi(this);

    //QStandardItemModel *model = new QStandardItemModel();
    model = new QStandardItemModel;

    model->setHorizontalHeaderItem(0,new QStandardItem(QObject::tr("No")));
    model->setHorizontalHeaderItem(1,new QStandardItem(QObject::tr("时间")));
    model->setHorizontalHeaderItem(2,new QStandardItem(QObject::tr("实现方式")));
    model->setHorizontalHeaderItem(3,new QStandardItem(QObject::tr("使用方式")));
    model->setHorizontalHeaderItem(4,new QStandardItem(QObject::tr("频率")));
    model->setHorizontalHeaderItem(5,new QStandardItem(QObject::tr("主题")));
    model->setHorizontalHeaderItem(6,new QStandardItem(QObject::tr("描述")));

    ui->tableView->setModel(model);
    ui->tableView->horizontalHeader()->setDefaultAlignment(Qt::AlignCenter);
    ui->tableView->setColumnWidth(6,300);
    ui->tableView->verticalHeader()->hide();
    // 行选择,选中整行
    ui->tableView->setSelectionBehavior(QAbstractItemView::SelectRows);
    ui->tableView->setEditTriggers(QAbstractItemView::NoEditTriggers);
    // 选择模式,单选
    ui->tableView->setSelectionMode(QAbstractItemView::SingleSelection);
    //ui->tableView->setSelectionMode(QAbstractItemView::MultiSelection);
    //隔行变色
    ui->tableView->setAlternatingRowColors(true);
    //根据内容自动调整列宽
    ui->tableView->horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch);
    //最后一行是否铺满剩余空间
    ui->tableView->horizontalHeader()->setStretchLastSection(true);

    //QString framedata = QString("[%1]:RX").arg(QTime::currentTime().toString("HH:mm:ss.zzz"));
    //model->setHorizontalHeaderItem(1,QStandardItem(framedata));

    QDateTime current_date_time = QDateTime::currentDateTime();    //获取当前系统时间
    QString current_date = current_date_time.toString("yyyy/MM/dd hh:mm:ss"); //时间格式
    qDebug() << current_date;

    model->setItem(0,0,new QStandardItem("1"));
    model->setItem(0,1, new QStandardItem("2022/07/23"));
    model->setItem(0,2, new QStandardItem("publish"));
    model->setItem(0,3, new QStandardItem("subscribe"));
    model->setItem(0,4, new QStandardItem("1HZ"));
    model->setItem(0,5, new QStandardItem("/10001901/2/1"));
    model->setItem(0,6, new QStandardItem("系统开机状态报文"));

    model->setItem(1,0,new QStandardItem("2"));
    model->setItem(1,1, new QStandardItem("2022/07/23"));
    model->setItem(1,2, new QStandardItem("publish"));
    model->setItem(1,3, new QStandardItem("subscribe"));
    model->setItem(1,4, new QStandardItem("1HZ"));
    model->setItem(1,5, new QStandardItem("/10001901/2/2"));
    model->setItem(1,6, new QStandardItem("点迹/航迹信息内容"));

    model->setItem(2,0,new QStandardItem("3"));
    model->setItem(2,1, new QStandardItem("2022/07/25"));
    model->setItem(2,2, new QStandardItem("publish"));
    model->setItem(2,3, new QStandardItem("subscribe"));
    model->setItem(2,4, new QStandardItem("1HZ"));
    model->setItem(2,5, new QStandardItem("/10001901/2/3"));
    model->setItem(2,6, new QStandardItem("BIT状态信息消息"));

    model->setItem(3,0,new QStandardItem("4"));
    model->setItem(3,1, new QStandardItem("2022/07/26"));
    model->setItem(3,2, new QStandardItem("publish"));
    model->setItem(3,3, new QStandardItem("subscribe"));
    model->setItem(3,4, new QStandardItem("2HZ"));
    model->setItem(3,5, new QStandardItem("/10001801/3/1"));
    model->setItem(3,6, new QStandardItem("声波信息消息"));

    model->setItem(4,0,new QStandardItem("5"));
    model->setItem(4,1, new QStandardItem("2022/08/01"));
    model->setItem(4,2, new QStandardItem("publish"));
    model->setItem(4,3, new QStandardItem("subscribe"));
    model->setItem(4,4, new QStandardItem("5HZ"));
    model->setItem(4,5, new QStandardItem("/10002201/4/2"));
    model->setItem(4,6, new QStandardItem("测量艇底层控制箱反馈数据"));


    //connect(ui->tableView, SIGNAL(doubleClicked(const QModelIndex &)), this, SLOT(on_tableView_doubleClicked(const QModelIndex &)));

    //connect(ui->tableView, SIGNAL(clicked(const QModelIndex &)), this, SLOT(on_tableView_doubleClicked(const QModelIndex &)));

}

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

void RecData::on_tableView_doubleClicked(const QModelIndex &index)
{
    showData *dataWindow = new showData;
    dataWindow->setWindowTitle("showData");
    dataWindow->show();

    QModelIndex row = ui->tableView->currentIndex();
    qDebug() << row;

    QStringList list;

    for(int i = 0; i < model->columnCount(); i++)
    {
        pindex = model->index(index.row(),i);
        pstr = model->data(pindex).toString();
        list << pstr;
        qDebug() << "data is: +" << pstr;
    }

    dataWindow->setData(list);

}

void RecData::on_tableView_clicked(const QModelIndex &index)
{
    ui->plainTextEdit->clear();

    for(int i = 0; i < model->columnCount(); i++)
    {
        pindex = model->index(index.row(),i);
        pstr = model->data(pindex).toString();
        ui->plainTextEdit->appendPlainText(pstr);
        qDebug() << "data is: +" << pstr;
    }

}

4、showdata.h

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#ifndef SHOWDATA_H
#define SHOWDATA_H

#include <QWidget>

namespace Ui {
class showData;
}

class showData : public QWidget
{
    Q_OBJECT

public:
    explicit showData(QWidget *parent = nullptr);
    ~showData();

    void setData(QStringList &list);

private:
    Ui::showData *ui;
};

#endif // SHOWDATA_H

5、showdata.cpp

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#include "showdata.h"
#include "RecData.h"
#include "ui_showdata.h"

extern RecData *model;

showData::showData(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::showData)
{
    ui->setupUi(this);

}

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

void showData::setData(QStringList &list)
{
    for(const auto &iter : list)
    {
        ui->plainTextEdit->appendPlainText(iter);
    }

}

6、main.cpp

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#include "RecData.h"
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    RecData w;
    w.show();

    return a.exec();
}