QT下TCP協議通信的Client端

 

/**********************
 *Write to 5 July 2012*
 *By Mr Rao           *
 **********************/
#ifndef _CLIENT_H_
#define _CLIENT_H_

#include <QDialog>
#include <QPushButton>
#include <QTextEdit>
#include <QLineEdit>
#include <QLabel>
#include <QVBoxLayout>
#include <QHBoxLayout>
#include <QTcpSocket>

class Dialog:public QDialog
{
    Q_OBJECT
public:
    Dialog();
    ~Dialog();

public slots:
    void send_slot();
    void connect_slot();
private:
    QLabel *lab;
    QLabel *lab1;
    QLineEdit *lineEdit;
    QLineEdit *lineEditPort;
    QPushButton *connectButton;
    QPushButton *sendButton;
    QPushButton *exitButton;
    QTextEdit *textEdit;
    QTcpSocket *tcpSocket;
    QString strIP;
    QString strPort;
};
#endif

 

#include "client.h"

Dialog::Dialog()
{
    connectButton = new QPushButton("connect");
    sendButton = new QPushButton("send");
    exitButton = new QPushButton("exit");
    lab = new QLabel(tr("To:"));
    lab1 = new QLabel(tr("Port:"));
    lineEdit = new QLineEdit;
    lineEditPort = new QLineEdit;
    textEdit = new QTextEdit;

    QHBoxLayout *topLayout = new QHBoxLayout;
    topLayout->addWidget(lab);
    topLayout->addWidget(lineEdit);
    topLayout->addWidget(lab1);
    topLayout->addWidget(lineEditPort);

    QHBoxLayout *centLayout = new QHBoxLayout;
    centLayout->addWidget(textEdit);

    QHBoxLayout *lastLayout = new QHBoxLayout;
    lastLayout->addWidget(connectButton);
    lastLayout->addWidget(sendButton);
    lastLayout->addWidget(exitButton);

    QVBoxLayout *mainLayout = new QVBoxLayout;
    mainLayout->addLayout(topLayout);
    mainLayout->addLayout(centLayout);
    mainLayout->addLayout(lastLayout);

    setLayout(mainLayout);

    sendButton->setDisabled(false);
    tcpSocket = new QTcpSocket;

    connect(connectButton,SIGNAL(clicked()),this,SLOT(connect_slot()));
    connect(sendButton,SIGNAL(clicked()),this,SLOT(send_slot()));
    connect(exitButton,SIGNAL(clicked()),this,SLOT(close()));
}
Dialog::~Dialog()
{
    delete lab;
    delete lineEdit;
    delete connectButton;
    delete sendButton;
    delete exitButton;
    delete textEdit;
    delete tcpSocket;
}
void Dialog::connect_slot()
{
    this->strIP = this->lineEdit->text();
    this->strPort = this->lineEditPort->text();
    tcpSocket->connectToHost(strIP , this->strPort.toInt(0 , 10));
}
void Dialog::send_slot()
{
    QString catstr = textEdit->toPlainText();
    tcpSocket->write(qPrintable(catstr));
}

#include <QApplication>
#include "client.h"

int main(int argc,char **argv)
{
    QApplication app(argc,argv);
    Dialog dlg;
    dlg.show();
    return app.exec();
}