基于QT的距离传输上位机

#include "widget.h" #include "ui_widget.h" #include <QDebug> #include <QScrollArea> #include <QScrollBar> Widget::Widget(QWidget *parent) : QWidget(parent) , ui(new Ui::Widget) { ui->setupUi(this); comboBox_config(); this->setWindowTitle("毫米雷达波测距"); } //基本配置 void Widget::comboBox_config() { /*第一部分：网络配置*/ //1.1配置协议 ui->comboBox_protocol->addItem("TCP Server"); //1.2获取并配置本地IP地址 QList<QHostAddress> list = QNetworkInterface::allAddresses(); for(int i=0;i<list.count();i++) { QHostAddress addr=list.at(i); if(addr.protocol() == QAbstractSocket::IPv4Protocol) { ui->comboBox_address->addItem(addr.toString()); } } //1.3设置可编辑性 ui->comboBox_address->setEditable(true); //1.4设置默认端口号 ui->lineEdit_port->setText("8080"); } Widget::~Widget() { delete ui; } /*日志显示*/ void Widget::ss_log(QString text) { qDebug()<<text; QPlainTextEdit *plainTextEdit_log=ui->plainTextEdit_log; //设置只读 if(!plainTextEdit_log->isReadOnly()) { plainTextEdit_log->setReadOnly(true); } //设置光标到文本末尾 plainTextEdit_log->moveCursor(QTextCursor::End, QTextCursor::MoveAnchor); plainTextEdit_log->insertPlainText(text); //移动滚动条到底部 QScrollBar *scrollbar = plainTextEdit_log->verticalScrollBar(); if(scrollbar) { scrollbar->setSliderPosition(scrollbar->maximum()); } } void Widget::on_pushButton_connect_clicked() { if(ui->pushButton_connect->text()=="打开服务器") { NewServer(); ss_log("已开启服务器\n"); } else { ui->pushButton_connect->setText("打开服务器"); for(int i=0;i<TcpFarClientList.count();i++) { TcpFarClientList.at(i)->close(); TcpFarClientList.removeAt(i); } LocalTcpServer->close();//关闭服务器 ss_log("已关闭服务器\n"); ui->comboBox_address->setEditable(true); ui->comboBox_protocol->setEditable(true); ui->lineEdit_port->setEnabled(true); } } //服务器模式：创建服务器 void Widget::NewServer() { /*1.实例化服务器*/ LocalTcpServer = new QTcpServer; /*2.设置监听的端口和IP地址*/ quint16 port = QString(ui->lineEdit_port->text()).toInt(); if(ui->comboBox_address->currentText()=="QHostAddress::Any") { LocalTcpServer->listen(QHostAddress::Any,port); }else { QHostAddress addr(ui->comboBox_address->currentText()); LocalTcpServer->listen(addr,port); } /*3.关联连接信号，检测是否有新的客户端连接*/ connect(LocalTcpServer,SIGNAL(newConnection()),this,SLOT(NewTcpConnection())); ui->pushButton_connect->setText("断开连接"); //创建服务器之后设置控件不可用 ui->comboBox_address->setEditable(false); ui->comboBox_protocol->setEnabled(false); ui->lineEdit_port->setEnabled(false); } void Widget::on_comboBox_protocol_activated(int index) { switch(index) { case 0: //服务器模式 ui->label_address->setText("（2）本地IP地址"); ui->label_port->setText("（3）本地端口号"); ui->comboBox_address->clear(); ui->comboBox_address->addItem("QHostAddress::Any"); break; } QList<QHostAddress> list = QNetworkInterface::allAddresses(); for(int i=0;i<list.count();i++) { QHostAddress addr=list.at(i); if(addr.protocol() == QAbstractSocket::IPv4Protocol) { ui->comboBox_address->addItem(addr.toString()); } } } //服务器模式：响应新连接的客户端 void Widget::NewTcpConnection() { /*创建本地服务器套接字*/ QTcpSocket *ServerSocket=LocalTcpServer->nextPendingConnection(); /*关联可读信号*/ connect(ServerSocket,SIGNAL(readyRead()),this,SLOT(ReadTcpClientData())); /*关联断开信号*/ connect(ServerSocket,SIGNAL(disconnected()),this,SLOT(TcpClientDisconnected())); ss_log("设备已连接\n"); } //服务器模式：响应断开的客户端 void Widget::TcpClientDisconnected() { ss_log("设备已断开\n"); for(int i=0;i<TcpFarClientList.count();i++) { //取出地址列表中的一个客户端地址 QTcpSocket *item = TcpFarClientList.at(i); //判断该客户端是否已经断开 if(item->socketDescriptor()==-1) { TcpFarClientList.removeAt(i); } } } //服务器模式：读数据 void Widget::ReadTcpClientData() { ss_log("接收到新的测量数据\n"); for(int i=0;i<TcpFarClientList.count();i++) { if(!TcpFarClientList.at(i)->atEnd()) { QByteArray array=TcpFarClientList.at(i)->readAll(); //记录接收的字节数并显示 QString text; text+=QString("").fromLocal8Bit(array); ui->plainTextEdit_ShowData->appendPlainText(QString("测量结果为：%1cm").arg(text)); ss_log(QString("当前测量距离为：%1cm\n").arg(text)); } } }