Qt:Tcp服务器与客户端程序

#include "tcpclient.h" TcpClient::TcpClient( QWidget *parent, Qt::WindowFlags f ) : QDialog( parent, f ) { QFont font("ZYSong18030",12); setFont(font); setWindowTitle(tr("TCP Client")); QVBoxLayout *vbMain = new QVBoxLayout( this ); ListWidgetContent = new QListWidget( this); vbMain->addWidget( ListWidgetContent ); QHBoxLayout *hb1 = new QHBoxLayout( ); LineEditSend = new QLineEdit(this); hb1->addWidget( LineEditSend ); PushButtonSend = new QPushButton( this); PushButtonSend->setText( tr( "Send" ) ); hb1->addWidget( PushButtonSend ); vbMain->addLayout( hb1 ); QHBoxLayout *hb2 = new QHBoxLayout( ); LabelUser = new QLabel( this ); LabelUser->setText(tr("User Name:")); hb2->addWidget( LabelUser ); LineEditUser = new QLineEdit(this); hb2->addWidget( LineEditUser ); QHBoxLayout *hb3 = new QHBoxLayout( ); LabelServerIP = new QLabel( this ); LabelServerIP->setText(tr("Server:")); hb3->addWidget( LabelServerIP ); LineEditServerIP = new QLineEdit(this); hb3->addWidget( LineEditServerIP ); QHBoxLayout *hb4 = new QHBoxLayout( ); LabelPort = new QLabel( this ); LabelPort->setText(tr("Port:")); hb4->addWidget( LabelPort ); LineEditPort = new QLineEdit(this); hb4->addWidget( LineEditPort ); vbMain->addLayout(hb2); vbMain->addLayout(hb3); vbMain->addLayout(hb4); PushButtonEnter = new QPushButton( this); PushButtonEnter->setText( tr( "Enter" ) ); vbMain->addWidget( PushButtonEnter ); connect(PushButtonEnter,SIGNAL(clicked()),this,SLOT(slotEnter())); connect(PushButtonSend,SIGNAL(clicked()),this,SLOT(slotSend())); serverIP = new QHostAddress(); port = 8010; LineEditPort->setText(QString::number(port)); status=false; PushButtonSend->setEnabled( false ); } TcpClient::~TcpClient() { } 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 ; } userName=LineEditUser->text(); tcpSocket = new QTcpSocket(this); connect(tcpSocket,SIGNAL(connected()),this,SLOT(slotConnected())); connect(tcpSocket,SIGNAL(disconnected()),this,SLOT(slotDisconnected())); connect(tcpSocket, SIGNAL(readyRead()),this, SLOT(dataReceived())); tcpSocket->connectToHost ( *serverIP, port); status=true; } else { int length = 0; QString msg=userName+tr(":Leave Chat Room"); if((length=tcpSocket->write(msg.toLatin1(),msg.length()))!=msg.length()) { return ; } tcpSocket->disconnectFromHost(); status=false; } } void TcpClient::slotConnected() { int length = 0; PushButtonSend->setEnabled( true ); PushButtonEnter->setText(tr("Leave")); QString msg=userName+tr(":Enter Chat Room"); if((length=tcpSocket->write(msg.toLatin1(),msg.length()))!=msg.length()) { return ; } } void TcpClient::slotDisconnected() { PushButtonSend->setEnabled( false ); PushButtonEnter->setText(tr("Enter")); } void TcpClient::slotSend() { if(LineEditSend->text()=="") { return ; } 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())); } }