QChart动态曲线(支持缩放)

#include "mainwindow.h" #include "ui_mainwindow.h" #include <QDebug> #include <QIODevice> #include <QtSerialPort/QSerialPortInfo> #include <QMessageBox> #include <QFileDialog> #include <fstream> #include <QFile> MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) { ui->setupUi(this); initForm(); initChart(); } MainWindow::~MainWindow() { delete ui; } //初始化界面 void MainWindow::initForm() { setWindowTitle(tr("串口调试 A1105")); //将QRadioButton分组 group1 = new QButtonGroup(this); group2 = new QButtonGroup(this); group1->addButton(ui->sendTextMode,1); group1->addButton(ui->sendHexMode,2); group2->addButton(ui->recTextMode,1); group2->addButton(ui->recHexMode,2); ui->lineEdit_offset1->setEnabled(false); ui->lineEdit_offset2->setEnabled(false); ui->botelv->setCurrentIndex(4); ui->shujuwei->setCurrentIndex(3); connect(ui->sendTextMode,SIGNAL(clicked()),this,SLOT(group1_clicked())); connect(ui->sendHexMode,SIGNAL(clicked()),this,SLOT(group1_clicked())); connect(ui->recTextMode,SIGNAL(clicked()),this,SLOT(group2_clicked())); connect(ui->recHexMode,SIGNAL(clicked()),this,SLOT(group2_clicked())); //改变串口的各种选项时，重新启动串口 connect(ui->chuankou,SIGNAL(currentIndexChanged(int)),this,SLOT(saveConfig())); connect(ui->botelv,SIGNAL(currentIndexChanged(int)),this,SLOT(saveConfig())); connect(ui->shujuwei,SIGNAL(currentIndexChanged(int)),this,SLOT(saveConfig())); connect(ui->jiaoyanwei,SIGNAL(currentIndexChanged(int)),this,SLOT(saveConfig())); connect(ui->tingzhiwei,SIGNAL(currentIndexChanged(int)),this,SLOT(saveConfig())); //初始化串口信息(在.PRO文件中加入QT+=serialport) foreach (const QSerialPortInfo &info, QSerialPortInfo::availablePorts()) { QSerialPort serial; serial.setPort(info); if(serial.open(QIODevice::ReadWrite)) { ui->chuankou->addItem(info.portName()); serial.close(); } } //选中自动发送，每隔一段时间就发送一次 timer = new QTimer(); connect(timer,SIGNAL(timeout()),this,SLOT(selectAutoSend())); } //每次选项改变的时候重新启动串口,各种参数好像能使用枚举类型搞定 void MainWindow::saveConfig() { MainWindow::portname = ui->chuankou->currentText(); MainWindow::baudrate = ui->botelv->currentText().toInt(); MainWindow::databit = ui->shujuwei->currentText().toInt(); MainWindow::parity = ui->jiaoyanwei->currentText(); MainWindow::stopbit = ui->tingzhiwei->currentText().toDouble(); qDebug() <<"串口参数改变,串口号/波特率/数据位/检验位/停止位:" <<portname <<baudrate <<databit <<parity <<stopbit; } void MainWindow::on_openBtn_clicked() { if(ui->openBtn->text() == "打开串口") { myPort = new QSerialPort(this); myPort->setPortName(portname); if(myPort->open(QIODevice::ReadWrite)) { myPort->setBaudRate(ui->botelv->currentText().toInt()); myPort->setDataBits(QSerialPort::DataBits(ui->shujuwei->currentText().toInt())); myPort->setParity(QSerialPort::Parity(ui->jiaoyanwei->currentIndex())); myPort->setStopBits(QSerialPort::StopBits(ui->tingzhiwei->currentIndex())); statusBar()->showMessage(tr("串口已经打开"));//状态栏显示的内容 connect(myPort, SIGNAL(readyRead()), this, SLOT(readCom())); } else { QMessageBox::information(this,tr("提示框"),tr("串口打开失败！")); return; } ui->openBtn->setText(tr("关闭串口")); } else { myPort->close(); //初始化控件不可用 statusBar()->showMessage(tr("串口已经关闭")); //状态栏显示的内容 ui->openBtn->setText(tr("打开串口")); if(timer->isActive()) timer->stop(); return; } } //是一个槽函数，不断读取从机器返回来的数据 void MainWindow::readCom() { QByteArray byte_data = myPort->readAll(); //读取串口数据 STRUCT_SERIAL_DATA receiveData; static QString strDisplay, strData; static int dataCount = 0; static bool dataFlag = false; bool ok; if (currentCount >= maxCount) //当前显示行数 { ui->receiveText->clear(); //清屏 currentCount = 0; } if (byte_data.isEmpty()) { qDebug() << "Error:: Receive Empty Message!!!!!!!!!!!!!"; return; } //将读取到的数据进行转化,是否是按16进制显示 if(isHexDisplay) { QString str = byte_data.toHex(); //返回16进制编码的副本 str = str.toUpper (); qDebug() << "ReceiveData" << str; strData += str; int tempCount = 0; QString strTemp; while(!strData.isEmpty()) { strTemp = strData.mid(tempCount,2); if(!dataFlag) { if((strData.length() - tempCount) >= 2*RECEIVE_DATA_NUMBER) { if((0 == dataCount) && strTemp == "FA") { dataFlag = true; strData = strData.mid(tempCount,strData.length()-tempCount); tempCount= 0; continue; } } else { strData = strData.mid(tempCount,strData.length()-tempCount); break; } } else { m_receiveData[dataCount] = strTemp.toShort(&ok,16); strDisplay += strTemp; strDisplay += " "; dataCount++; if(8 == dataCount) { strDisplay +="\n"; ui->receiveText->insertPlainText(strDisplay); strDisplay.clear(); currentCount++; if(0xFB == m_receiveData[7]) { if(m_receiveData[1] || m_receiveData[2] || m_receiveData[3] || m_receiveData[4]) { receiveData.chlData[0] = m_receiveData[2] + (((uint16_t)m_receiveData[1]) << 8); receiveData.chlData[1] = m_receiveData[4] + (((uint16_t)m_receiveData[3]) << 8); receiveData.offset[0] = m_receiveData[5] & 0x3F; receiveData.offset[1] = m_receiveData[6] & 0x3F; emit serialDataUpdate(receiveData); } } dataCount= 0; dataFlag = false; strData = strData.mid(2*RECEIVE_DATA_NUMBER, strData.length()-2*RECEIVE_DATA_NUMBER); tempCount= 0; } } tempCount += 2; } } else { ui->receiveText->insertPlainText(byte_data); } byte_data.clear(); } //清空接收框 void MainWindow::on_receiveCleanBtn_clicked() { ui->receiveText->clear(); } //保存接收数据 void MainWindow::on_saveReceiveBtn_clicked() { QString text = ui->receiveText->toPlainText(); if(text == "") { QMessageBox::warning(this,tr("警告框"),tr("文本框没有信息，无法保存")); return; } QString fileName = QFileDialog::getSaveFileName(this, tr("Save File"),"./receieve.txt",tr("Text files (*.txt)")); QFile file(fileName); if(file.open((QIODevice::