基于Qt的屏幕共享系统

#include "mainwindow.h" #include "ui_mainwindow.h" MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) , ui(new Ui::MainWindow) { ui->setupUi(this); TcpServer = new QTcpServer(this); clientSocket = new QTcpSocket(this); serverSocket= new QTcpSocket(this); desktop = QApplication::desktop(); //提示信息 ui->ipAddr->setPlaceholderText("Please enter an IP address :"); screenShare.setWindowTitle("server"); acceptScreen.setWindowTitle("client"); //当点击file后点击create server时程序为服务端模式 connect(ui->new_Connection, &QAction::triggered, this, &MainWindow::setTcpServer); //当输入ip后，程序为客户端模式 connect(ui->signIp, &QPushButton::clicked, this, &MainWindow::setTcpClient); } MainWindow::~MainWindow() { delete ui; } //定时器，实现服务端发送屏幕主功能 void MainWindow::timeTimer() { //调用screenshow的函数 screenShare.startShow(); screenShare.closeShow(); //当点击开始分享按钮时，执行以下if，服务端发送数据 if(flag == true) { ba = setDatagram(ba);//设置数据报 for(int i = 0; i < allSocket.size(); i++) { allSocket[i]->write(ba); } ba.clear(); } //当关闭客户端窗口时，断开tcp连接 if(connectFlag == false) serverSocket->disconnectFromHost(); } //当点击new Connection时，调用此函数，设置为服务端模式 void MainWindow::setTcpServer() { qDebug() << "设置服务端连接成功"; //设置为服务端模式 tcpServerSetting(TcpServer); connect(TcpServer, &QTcpServer::newConnection, this, &MainWindow::connectToClient);//新连接接入信号槽 //this->hide(); screenShare.show(); timer = Timerstrat(200); connect(timer, &QTimer::timeout, this, &MainWindow::timeTimer); } //当点击sign in时，调用此函数，设置为客户端模式 void MainWindow::setTcpClient() { //设置为客户端模式 tcpClientSetting(clientSocket,ui->ipAddr->text()); if(clientSocket->state() == QAbstractSocket::UnconnectedState) { qDebug() << "error"; } qDebug() << "设置客户端连接成功"; acceptScreen.show(); //若套接字连接上，则触发connectedToServer函数 connect(clientSocket, &QTcpSocket::connected, this, &MainWindow::connectedToServer); } //当服务端连接上客户端时，调用此函数 void MainWindow::connectToClient() { //取出建立好连接的套接字 QObject *object = QObject::sender();//获取信号发送者 QTcpServer *server = qobject_cast<QTcpServer *>(object);//将object对象转换为QTcpServer对象/ serverSocket = server->nextPendingConnection();//建立新的套接字 allSocket.append(serverSocket); qDebug()<< allSocket; screenShare.showNum(QString("%1").arg(allSocket.size())); //获取对方的IP和端口 QString ip = serverSocket->peerAddress().toString(); qint16 port = serverSocket->peerPort(); screenShare.showClientList(QString("[%1:%2]").arg(ip).arg(port)); qDebug() << "连接客户端成功"; } //当客户端连接上服务端时，调用此函数 void MainWindow::connectedToServer() { qDebug() << "连接服务器成功"; //若套接字接收到，则触发readsocket函数 connect(clientSocket, &QIODevice::readyRead, this, &MainWindow::readSocket); } //当客户端连接上服务端且接收到服务端信息时，调用此函数 void MainWindow::readSocket() { QPixmap map; QByteArray headdata; headdata[0]='#'; headdata[1]='#'; headdata[2]='@'; headdata[3]='$'; headdata[4]=':'; headdata[5]=':'; QByteArray lastdata; lastdata[0]=':'; lastdata[1]=':'; lastdata[2]='*'; lastdata[3]='*'; lastdata[4]='$'; lastdata[5]='#'; myData.append(clientSocket->readAll()); int lastindex=myData.indexOf(lastdata,0);//寻找包尾位置 if(lastindex!=-1){ int headindex=myData.indexOf(headdata,0);//寻找包头位置 myData.remove(0,headindex);//移除多余内容 if(headindex!=-1){ realData = myData.mid(6,myData.size()-12);//取出真实数据 map.loadFromData(realData); acceptScreen.clientShow(map); myData.remove(0,realData.size()+12); } } } //获取屏幕截图 QPixmap MainWindow::getScreen(QPixmap pixmap) { QScreen *screen = QGuiApplication::primaryScreen(); pixmap = screen->grabWindow(desktop->winId(), 0, 0, -1, -1); //快速缩放(FastTransformation)、平滑缩放(SmoothTransformation) pixmap = pixmap.scaled(desktop->width()*0.8, desktop->height()*0.8, Qt::KeepAspectRatio, Qt::FastTransformation) .scaled(desktop->width()*0.6, desktop->height()*0.6, Qt::KeepAspectRatio, Qt::SmoothTransformation); return pixmap; } //设置数据报函数，设置数据报首尾 QByteArray MainWindow::setDatagram(QByteArray data) { newpixmap = getScreen(newpixmap); screenShare.serverShow(newpixmap); //图片变化时则发送，否则不发送 if(oldpixmap.toImage()!=newpixmap.toImage()) { QByteArray ByteArray; image=newpixmap.toImage(); QBuffer buffer(&ByteArray); ByteArray.resize(0); buffer.open(QIODevice::ReadWrite); image.save(&buffer ,"jpg"); char t_header[7] = "##@$::"; char t_tail[7] = "::**$#"; data.append(t_header); data.append(ByteArray); data.append(t_tail); } return data; }