Qt使用QPainter自绘温度计源代码

#include "mainwindow.h" #include "ui_mainwindow.h" extern UseData m_UseInfo; MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) , ui(new Ui::MainWindow) { ui->setupUi(this); m_tcpClient = new tcpClient(this); m_tcpClient->start(); QTimer *lineT = new QTimer(this); initLineChart(); initPersonalInfo(); initTable(ui->useLoginTable, 0, 0,{"Name","Level","dateTime"}); initTable(ui->userManTable, 0, 0, {"Name", "PassWord", "Level", "Classes"}); ui->tabWidget->setCurrentIndex(0); ui->tabWidget->tabBar()->setEnabled(false); lineT->start(1000); connect(m_tcpClient->tcpSocket,&QTcpSocket::connected, this, &MainWindow::connectOk); connect(m_tcpClient->tcpSocket,&QTcpSocket::disconnected,this,&MainWindow::disConnectOk); connect(m_tcpClient, &tcpClient::sendTcpMsg, this,&MainWindow::updateData); connect(this, &MainWindow::connectServer, m_tcpClient, &tcpClient::connectServer); connect(this, &MainWindow::disConnectServer, m_tcpClient, &tcpClient::disConnectServer); connect(lineT, SIGNAL(timeout()), this, SLOT(updateLine())); } MainWindow::~MainWindow() { emit disConnectServer(); m_tcpClient->setRun(); m_tcpClient->wait(); delete ui; } void MainWindow::initLineChart() { maxXTickCount = 5; m_chart = new QChart; ui->widget_2->setChart(m_chart); ui->widget_2->setRubberBand(QChartView::HorizontalRubberBand); ui->widget_2->setRenderHint(QPainter::Antialiasing); m_series = new QSplineSeries; m_series->setUseOpenGL(true); axisX = new QValueAxis; // axisX->setLabelFormat("%g"); axisX->setLabelsVisible(false); curSec = QTime::currentTime().second(); axisX->setTickCount(maxXTickCount); // axisX->setTitleText("axisX"); axisX->setRange(curSec, curSec+maxXTickCount*2);//设置显示范围 axisY = new QValueAxis; axisY->setRange(-30, 30); axisY->setTickCount(7); m_x = curSec; m_y = -25; m_series->append(m_x, m_y); m_chart->createDefaultAxes(); m_chart->addSeries(m_series); m_chart->setAxisX(axisX, m_series); m_chart->setAxisY(axisY, m_series); m_chart->legend()->hide(); m_chart->setTheme(QChart::ChartThemeDark); } void MainWindow::initPersonalInfo() { ui->nameLab->setText(m_UseInfo.name); ui->levelLab->setText(QString("%1").arg(m_UseInfo.level)); ui->timeLab->setText(QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm")); // if(m_UseInfo.level < UseLevel) // ui->sortLab->setText("普通用户"); // else // ui->sortLab->setText("管理员"); ui->sortLab->setText(m_UseInfo.classes); } void MainWindow::initTable(QTableWidget *table, int row, int col, QStringList strList) { //设置单选 table->setSelectionMode(QAbstractItemView::SingleSelection); //设置选中时默认选择一行 table->setSelectionBehavior(QAbstractItemView::SelectRows); //禁止编辑 table->setEditTriggers(QAbstractItemView::NoEditTriggers); table->verticalHeader()->setDefaultSectionSize(10); //设置一行默认高度 //设置水平表头的标题 table->setHorizontalHeaderLabels(strList); //设置垂直表头不可见 table->verticalHeader()->setHidden(true); } //修改用户密码 void MainWindow::on_alterPwdBtn_clicked() { QString oldPwd = ui->oldPwdEdit->text().trimmed(); QString newPwd = ui->newPwdEdit->text().trimmed(); if(oldPwd.isEmpty() || newPwd.isEmpty()) { QMessageBox::warning(this,"warn",QString("密码不能为空,请重新输入")); return; } if(oldPwd == m_UseInfo.pwd) { bool m_ok = false; //普通用户 if(m_UseInfo.classes == QString("普通用户")) m_ok = My_SQL::changeData(QString("update meanTable set pwd = '%1' where name = '%2'").arg(newPwd).arg(m_UseInfo.name)); //管理员 else if(m_UseInfo.classes == QString("管理员")) m_ok = My_SQL::changeData(QString("update rootTable set pwd = '%1' where name = '%2'").arg(newPwd).arg(m_UseInfo.name)); QMessageBox::information(this,"info",m_ok?QString("修改成功"):QString("修改失败")); } else { QMessageBox::warning(this,"warn",QString("密码错误,请重新输入")); return; } } //注销 void MainWindow::on_exitBtn_clicked() { QMessageBox::StandardButton m_ok = QMessageBox::information(nullptr, "info", "是否需要重新登录", QMessageBox::Ok, QMessageBox::Cancel); if(m_ok == QMessageBox::Ok) { //重新启动登录界面 QProcess *p = new QProcess(); p->startDetached("D:/build-MES_user-Desktop_Qt_5_15_0_MSVC2019_64bit-Debug/debug/MES_user.exe"); } //关闭当前登录 this->close(); } //主页 void MainWindow::on_toolButton_5_clicked() { ui->tabWidget->setCurrentIndex(0); } //个人中心 void MainWindow::on_toolButton_clicked() { ui->tabWidget->setCurrentIndex(1); } //用户管理 void MainWindow::on_toolButton_2_clicked() { ui->tabWidget->setCurrentIndex(2); } //信息查询 void MainWindow::on_toolButton_3_clicked() { ui->tabWidget->setCurrentIndex(3); } //设置 void MainWindow::on_toolButton_4_clicked() { ui->tabWidget->setCurrentIndex(4); } //用户登录信息查询 void MainWindow::on_pushButton_4_clicked() { int rowNum = ui->useLoginTable->rowCount(); for (int i=0; i<rowNum; ++i) { ui->useLoginTable->removeRow(0); } QDateTime _time = QDateTime::currentDateTime(); QMap<QString, int> block; int total = 0; for (int i=0; i<ui->comboBox->currentIndex()*3+1; ++i) { QString _day = _time.addDays(-1*i).toString("yyyyMMdd"); QVector<UseLoginInfo> v; My_SQL::selectData(QString("select * from loginTable t where t.date like '%1%'").arg(_day), v); int count = v.count(); total += count; if(count != 0) block.insert(_day, count); for (int i=0; i<count; ++i) { ui->useLoginTable->insertRow(i); ui->useLoginTable->setItem(i, 0, new QTableWidgetItem(QString("%1").arg(v.at(i).name))); ui->useLoginTable->setItem(i, 1, new QTableWidgetItem(QString("%1").arg(v.at(i).level))); ui->useLoginTable->setItem(i, 2, new QTableWidgetItem(QString("%1").arg(v.at(i).date))); } } if(total == 0) return; //创建饼图并显示 QPieSeries *series = new QPieSeries(); for(auto it=block.begin();it!=block.end(); ++it){ QString percentage = QString::number(float(it.value())/total*100, 'f', 1); //设置比例 series->append(it.key().right(2)+ " "+percentage, it.value()*100/total); } series->setLabelsVisible(); QChart *chart = new QChart(); chart->addSeries(series); // chart->setTitle("PieChart Example"); chart->legend()->hide(); ui->pieChart->setChart(chart); ui->pieChart->setRenderHint(QPainter::Antialiasing); // ui->pieChart->chart()->legend()->setAlignment(Qt::AlignBottom); ui->pieChart->chart()->setTheme(QChart::ChartThemeDark); } //用户管理 搜索功能 void MainWindow::on_serachToolBtn_clicked() { int rowNum = ui->userManTable->rowCount(); for (int i=0; i<rowNum; ++i) { ui->userManTable->removeRow(0); } m_userData.clear(); ui->curUserLE->clear(); ui->curPwdLE->clear(); ui->levelSpinBox->setValue(0); ui->useClassLab->setText("---"); //数据库表名 QString _t = "meanTable"; if(ui->userComBox->currentIndex() == 1) _t = "rootTable"; if(ui->serachUNLineEdit->text().isEmpty()) My_SQL::selectData(QString("select * from %1").arg(_t), m_userData); else My_SQL::selectData(QString("sel