Qt绘制动态罗盘

介绍：罗盘指针以30°角旋转巡逻，扫描航海范围内的点位，并绘制点云。字段信息在表格中显示，该数据都存储在数据库中。选择不同的范围，显示该范围内的点位。

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

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

    initSystem();

    initQTableView();

    initQCheckBox();

    initDataBase();
}

MainWindow::~MainWindow()
{
    delete ui;

    m_myDatabase.close();
}

void MainWindow::initSystem()
{
    sourceDataList.clear();
    m_RefreshBtn    = new QPushButton("刷新",this);
    m_EscalationBtn = new QPushButton("上报",this);
    m_ResettingBtn  = new QPushButton("重置",this);

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

    ui->statusbar->addPermanentWidget(m_RefreshBtn);
    ui->statusbar->addPermanentWidget(m_EscalationBtn);
    ui->statusbar->addPermanentWidget(m_ResettingBtn);
    ui->statusbar->setSizeGripEnabled(false);//去掉状态栏右下角的三角


    ui->tableViewTarget->setModel(m_model);
    ui->tableViewTarget->setSelectionModel(m_selectModel);
    ui->tableViewTarget->setSelectionMode(QAbstractItemView::ExtendedSelection);
    ui->tableViewTarget->setSelectionBehavior(QAbstractItemView::SelectItems);
    ui->tableViewTarget->verticalHeader()->hide();
    ui->tableViewTarget->setEditTriggers(QAbstractItemView::NoEditTriggers);


    // 设置行表头自适应调整大小
    ui->tableViewTarget->horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch);
}

void MainWindow::initQTableView()
{
    QStringList headerList;
    headerList<<"批号"
              <<"目标方位"
              <<"目标距离"
              <<"目标属性"
              <<"目标种类"
              <<"目标航向";
    m_model->setHorizontalHeaderLabels(headerList);
}

void MainWindow::initQCheckBox()
{
    m_InTheAir       = new QCheckBox(INDEXAIRSTR);
    m_SurfaceOfWater = new QCheckBox(INDEXSURFACEWATER);
    m_underwater     = new QCheckBox(INDEXUNDEXWATER);
    m_Shore          = new QCheckBox(INDEXSHORE);

    //开启三态选择
    m_InTheAir->setTristate(true);
    m_SurfaceOfWater->setTristate(true);
    m_underwater->setTristate(true);
    m_Shore->setTristate(true);

    //设置初始状态
    m_InTheAir->setCheckState(Qt::Checked);
    m_SurfaceOfWater->setCheckState(Qt::Checked);
    m_underwater->setCheckState(Qt::Checked);
    m_Shore->setCheckState(Qt::Checked);

    QString styleSheet =
         "QCheckBox::indicator:indeterminate {"
         "border-image: url(:/checkbox_dark_normal.png);"  // 半选中状态的图片
         "}"
         "QCheckBox::indicator:unchecked {"
         "border-image: url(:/checkbox_dark_hover.png);"  // 未选中状态的图片
         "}"
         "QCheckBox::indicator:checked {"
         "    background-image: url(:/checkbox_dark_pressed.png);"  // 选中状态的图片
         "}"
         "QCheckBox::indicator {"
         "    width: 20px;"  // 设置复选框宽度
         "    height: 20px;"  // 设置复选框高度
         "}";

    // 设置样式表，使用本地图片作为背景
    m_InTheAir->setStyleSheet(styleSheet);
    m_SurfaceOfWater->setStyleSheet(styleSheet);
    m_underwater->setStyleSheet(styleSheet);
    m_Shore->setStyleSheet(styleSheet);

    QHBoxLayout *alayout = new QHBoxLayout;
    alayout->addWidget(m_InTheAir);
    alayout->addWidget(m_SurfaceOfWater);
    alayout->addWidget(m_underwater);
    alayout->addWidget(m_Shore);

    ui->widgetInsertCheckBox-> setLayout(alayout);

    connect(m_InTheAir,&QCheckBox:: stateChanged,this, &MainWindow::do_checkBoxAirSlot);
    connect(m_SurfaceOfWater,&QCheckBox:: stateChanged,this, &MainWindow::do_checkBoxSurfaceWaterSlot);
    connect(m_underwater,&QCheckBox:: stateChanged,this, &MainWindow::do_checkBoxUnderWaterSlot);
    connect(m_Shore,&QCheckBox:: stateChanged,this, &MainWindow::do_checkBoxShoreSlot);
}

void MainWindow::setQtableViewIndex(QString indexName, int &state)
{
   if(state == Qt::Checked){//选中
          int rowTotal = sourceDataList.size();
          for (int row = 0; row < rowTotal ; row++) {
              QString aLineText = sourceDataList.at(row);//获取一行数据
              QStringList tempList = aLineText.split(" ");//把一行数据，用空格隔开
              if(aLineText.contains(indexName) == true){
                   m_model->insertRow(m_model->rowCount(), QList<QStandardItem*>()
                                             << new QStandardItem(tempList.at(0))
                                             << new QStandardItem(tempList.at(1))
                                             << new QStandardItem(tempList.at(2))
                                             << new QStandardItem(tempList.at(3))
                                             << new QStandardItem(tempList.at(4))
                                             << new QStandardItem(tempList.at(5)));
              }

          }

          //创建排序和过滤代理
          QSortFilterProxyModel*   proxyModel = new QSortFilterProxyModel(this);
          // 创建过滤器
          proxyModel->setSourceModel(m_model);
          proxyModel->setFilterKeyColumn(0);

          proxyModel->sort(0, Qt::AscendingOrder);
          // 设置表格视图的模型为过滤器
          ui->tableViewTarget->setModel(proxyModel);

   }else if(state == Qt::Unchecked){//未选择
       // 删除满足条件的行
       for (int row = 0; row < m_model->rowCount(); ++row) {
           if (m_model->item(row, 4)->text() == indexName) {
               m_model->removeRow(row);
               // 因为删除了一行，所以需要重新检查当前行
               --row;
           }
       }
   }else if(state == Qt::PartiallyChecked){//半选中
       //no deal with
   }
   undatePointClouds();
}

void MainWindow::do_checkBoxAirSlot(int state)
{
    setQtableViewIndex(INDEXAIRSTR,state);
}

void MainWindow::do_checkBoxSurfaceWaterSlot(int state)
{
    setQtableViewIndex(INDEXSURFACEWATER,state);
}

void MainWindow::do_checkBoxUnderWaterSlot(int state)
{
    setQtableViewIndex(INDEXUNDEXWATER,state);
}

void MainWindow::do_checkBoxShoreSlot(int state)
{
    setQtableViewIndex(INDEXSHORE,state);
}


void MainWindow::initDataBase()
{
    //安装驱动
    m_myDatabase = QSqlDatabase::addDatabase("QSQLITE");

    //给数据库取名字
    m_myDatabase.setDatabaseName("situation.db");

    //打开数据库
    if(!m_myDatabase.open())
    {
        qDebug() << "Error to open database" << m_myDatabase.lastError();
        return;
    }

    createDataBase();
}

//创建数据库
void MainWindow::createDataBase()
{
    QSqlQuery query;

    if(!query.exec("create table if not exists situation(batchNumber int, targetBeare double ,"
                   "targetDistance double, targetProperties text, targetType text, targetCourse int);"))
    {
        qDebug() << "Create Table is error" << m_myDatabase.lastError();
        return;
    }
    serchDataBase();
}

//插入数据库数据  【如果后期需要插入数据，可以调用此接口】
void MainWindow::insertDataBase(int &batchNum,double &targetBear,double &targetDist,QString &targetPro,QString &targetType,int & targetCourse)
{
    QSqlQuery query = QSqlQuery(m_myDatabase);
     QString cmd = QString("insert into situation values(\"%1\",\"%2\",\"%3\",\"%4\",\"%5\",\"%6\");")
             .arg(batchNum).arg(targetBear).arg(targetDist).arg(targetPro).arg(targetType).arg(targetCourse);
     if(!query.exec(cmd))
     {
         qDebug() << "Error to Insert Into Database " << m_myDatabase.lastError();
         return;
     }
}

void MainWindow::undatePointClouds()
{
    m_X.clear();
    m_Y.clear();

    for (int row = 0; row < m_model->rowCount(); ++row) {
        QModelIndex index1 = m_model->index(row, 1, QModelIndex()); // 第2列
        QModelIndex index2 = m_model->index(row, 2, QModelIndex()); // 第3列
        QVariant data1 = m_model->data(index1, Qt::DisplayRole);
        QVariant data2 = m_model->data(index2, Qt::DisplayRole);
        m_X.push_back(data1.toDouble());
        m_Y.push_back(data2.toDouble());
    }
    ui->widget->initQCustomPlot(ui->widget,m_X,m_Y);
}

//查询数据库成员
void MainWindow::serchDataBase()
{
    QSqlQuery query = QSqlQuery(m_myDatabase);
    QString cmd = QString("select * from situation");//查询数据库
    if(!query.exec(cmd))//判断数据库是否为空
    {
       qDebug() << "Error Select to Database" << m_myDatabase.lastError();
       return;
    }

    QSqlRecord record = query.record();//获取当前记录

    QStandardItem *aItem;
    int i = 0;
      //在表格中显示信息
    while (query.next()){
        QString aLine = "";
        aLine.clear();
        for (int j = 0; j < record.count(); ++j) {
             aItem = new QStandardItem(query.value(j).toString());
             m_model->setItem(i,j,aItem);

             aLine.append(query.value(j).toString());
             aLine.append(" ");
        }
        sourceDataList.append(aLine);
        i++;
    }
    undatePointClouds();
}

原文地址：https://blog.csdn.net/weixin_44585751/article/details/136446119

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