qt基于Socket的实时网络聊天

#include "tcpclient.h" #include <QGridLayout> #include <QMessageBox> #include <QTextCodec> TcpClient::TcpClient(QWidget *parent) : QDialog(parent) { QFont font("GB1302",12); setFont(font); setWindowTitle(tr("Tcp Client:A")); setStyleSheet("background-color:rgb(180,180,180"); QTextCodec::setCodecForTr(QTextCodec::codecForLocale()); QHBoxLayout *vbMain=new QHBoxLayout(this); ListWidgetContent=new QListWidget(this); vbMain->addWidget(ListWidgetContent); QVBoxLayout *vb1=new QVBoxLayout(); QVBoxLayout *vb2=new QVBoxLayout(); QVBoxLayout *vb3=new QVBoxLayout(); QHBoxLayout *hb4=new QHBoxLayout(); QHBoxLayout *hb5=new QHBoxLayout(); QHBoxLayout *hb6=new QHBoxLayout(); LineEditSend=new QLineEdit(this); vb3->addWidget(LineEditSend); PushButtonSend=new QPushButton(this); PushButtonSend->setText(tr("发送")); vb3->addWidget(PushButtonSend); LabelUser=new QLabel(tr("用户名:")); vb1->addWidget(LabelUser); LineEditUser=new QLineEdit(this); vb1->addWidget(LineEditUser); LineEditUser->setText(tr("Jack")); userName=LineEditUser->text(); LabelServerIP=new QLabel(tr("服务器 IP:")); vb2->addWidget(LabelServerIP); LineEditServerIP=new QLineEdit(this); vb2->addWidget(LineEditServerIP); LineEditServerIP->setText(tr("58.154.232.97")); LabelPort=new QLabel(tr("端口号:")); hb4->addWidget(LabelPort); LineEditPort=new QLineEdit(this); port=8010; LineEditPort->setText(QString::number(port)); hb4->addWidget(LineEditPort); status=false; f=false; PushButtonEnter=new QPushButton(tr("登录")); hb5->addWidget(PushButtonEnter); connect(PushButtonEnter,SIGNAL(clicked()),this,SLOT(slotEnter())); connect(PushButtonSend,SIGNAL(clicked()),this,SLOT(slotSend())); serverIP=new QHostAddress(); PushButtonSend->setEnabled(false); PushButtonQuit=new QPushButton(tr("退出")); hb5->addWidget(PushButtonQuit); connect(PushButtonQuit,SIGNAL(clicked()),this,SLOT(close())); PushButtonClear=new QPushButton(this); PushButtonClear->setText(tr("清除")); vb3->addWidget(PushButtonClear); connect(PushButtonClear,SIGNAL(clicked()),this,SLOT(slotClear())); vb1->addLayout(hb6); vb1->addLayout(hb4); vb1->addLayout(vb2); vb1->addLayout(vb3); vb1->addLayout(hb5); vbMain->addLayout(vb1); tcpSocket=new QTcpSocket(this); connect(tcpSocket,SIGNAL(error(QAbstractSocket::SocketError)),this,SLOT(displayError(QAbstractSocket::SocketError))); } TcpClient::~TcpClient() { } void TcpClient::slotClear() { ListWidgetContent->clear(); } void TcpClient::slotEnter() { if(!status) { QString ip=LineEditServerIP->text(); if(!serverIP->setAddress(ip)) { QMessageBox::information(this,tr("Error"),tr("Server IP address error")); return; } if(LineEditUser->text()=="") { QMessageBox::information(this,tr("Error"),tr("User name error")); return; } connect(tcpSocket,SIGNAL(connected()),this,SLOT(slotConnected())); connect(tcpSocket,SIGNAL(disconnected()),this,SLOT(slotDisconnected())); connect(tcpSocket,SIGNAL(readyRead()),this,SLOT(dataReceived())); connect(tcpSocket,SIGNAL(error(QAbstractSocket::SocketError)),this,SLOT(displayError(QAbstractSocket::SocketError))); status=true; f=true; tcpSocket->connectToHost(*serverIP,port); } else { int length=0; userName=LineEditUser->text(); QString msg=userName+tr(":Leave Chat Room"); if((length=tcpSocket->write(msg.toLatin1(),msg.length()))!=msg.length()) { return; } tcpSocket->disconnectFromHost(); status=false; PushButtonSend->setEnabled(false); PushButtonEnter->setText(tr("登录")); } } void TcpClient::displayError(QAbstractSocket::SocketError) { QMessageBox::information(this,NULL,tr("Error:%1").arg(tcpSocket->errorString())); tcpSocket->disconnectFromHost(); status=false; PushButtonSend->setEnabled(false); } void TcpClient::slotSend() { if(LineEditSend->text()=="") { return; } userName=LineEditUser->text(); QString msg=userName+":"+LineEditSend->text(); tcpSocket->write(msg.toLatin1(),msg.length()); LineEditSend->clear(); } void TcpClient::dataReceived() { while(tcpSocket->bytesAvailable()>0) { QByteArray datagram; datagram.resize(tcpSocket->bytesAvailable()); QHostAddress sender; tcpSocket->read(datagram.data(),datagram.size()); QString msg=datagram.data(); ListWidgetContent->addItem(msg.left(datagram.size())); } } void TcpClient::slotConnected() { if(f) { int length=0; PushButtonSend->setEnabled(false); PushButtonEnter->setText(tr("离开")); userName=LineEditUser->text(); QString msg=userName+tr(":Enter Chat Room"); if((length=tcpSocket->write(msg.toLatin1(),msg.length()))!=msg.length()) { return; } f=false; } PushButtonSend->setEnabled(true); }