Develop an Chat Application as use QT

Hello, every one. I am a new member of QT. I am writing a Chat Application( as Pigin). But I have a trouble, I have displayed list nick chat. In my Project, I use thread extend QThread and QTcpSocket to receive response from server for update other GUI form, ex: add a new Nick or message from other friend. But
my socket read data very bad (data usually lose). Here is my MyThread.h code

Code:

---

#ifndef MYTHREAD_H
#define MYTHREAD_H
 
#include <QThread>
#include <QString>
using namespace std;
class MyThread : public QThread
{
    Q_OBJECT
public:
    explicit MyThread(QObject *parent = 0);
protected:
    virtual void run();
 
signals:
    void updateChat(QString);// Signal to update form chat!
// and another signal....
 
public slots:
    void Process();// function to process response from server
};
 
#endif // MYTHREAD_H

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and here is file MyThread.cpp

Code:

---

#include "mythread.h"
#include <QDebug>
#include "login.h"
#include <QObject>
MyThread::MyThread(QObject *parent) :
    QThread(parent)
{
 
}
 void MyThread::run()
 {
    Process();
 
 }
void MyThread::Process()
{
    QString comnand;
 
   qDebug()<<"Running....";
    int re;
  while(true) {
     newSocket->socket->waitForReadyRead(9000000);
     command = QString::fromUtf8( newSocket->socket->readAll());
 
    if(!comand.isEmpty()) {
        qDebug()<<"Command :"<<command;
        QStringList list = comand.split("@|@", QString::SkipEmptyParts);
         if(list.at(0).compare("CHAT")==0) {
              emit updateChat(comand);
          }
     // ..... and many other commands 
    else {
    }
 
    }
}

---

and here is file chat.cpp to update content for box chat

Code:

---

#include "chat.h"
#include "ui_chat.h"
#include "login.h"
#include <QDebug>
#include "global2.h"
#include "list.h"
Chat::Chat(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::Chat)
{
    ui->setupUi(this);
    connect(mThread,SIGNAL(updateChat(QString)),this,SLOT(updateBoxChat(QString)));// connect to thread to update box chat
}
 
Chat::~Chat()
{
    delete ui;
}
QString Chat::getID()
{
    return id;
}
 void  Chat::setID(QString s)
 {
     this->id=s;
 }
 QString Chat::getName()
 {
     return this->name;
 }
 
 void Chat::setName(QString s)
 {
     name = s;
 }
 
void Chat::updateBoxChat(QString s)
 {
    qDebug()<<"Content :"<<s;
         QStringList temp=s.split("@|@");
         QString nickname=temp.at(1);
         nickname=nickname.trimmed();
         QString key = List::getIntance()->persons.key(nickname);
         QString id = this->getID();
         qDebug()<<"Key:"<<key;
         QString content=temp.at(2);
         bool hidden = this->isHidden();
         if(key.compare(id)==0) {
             this->setWindowTitle(nickname);
             ui->noidung->append(nickname+" " + content);
             if(hidden==false)
                 this->show();
         }
 }
 void Chat::closeEvent(QCloseEvent *event)
 {
         QString s = this->getID();
         qDebug()<<this->isHidden();
         this->setHidden(true);
         qDebug()<<this->isHidden();
}
void Chat::on_Send_clicked()
{
 
    int row = List::getIntance()->listWidget->currentRow();
    QString userName =  List::getIntance()->t[row];
    //qDebug()<<"ID :"<<userName;
    QString text="CHAT@|@"+userName+"@|@"+this->ui->textEdit->toPlainText();
   // qDebug()<<text;
    QByteArray textTemp(text.toUtf8());
   //qDebug()<<"Send Message to server!";
    QString s = "Me: "+ ui->textEdit->toPlainText();
     newSocket->socket->write(textTemp);
    this->ui->textEdit->clear();
    this->ui->noidung->append(s);
    this->ui->textEdit->setFocus();
}

---

Please help me solve this problem! Thank you!

Hi,
remember that receiving from a TCP socket you must check how many bytes you received.

Here

Code:

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command = QString::fromUtf8( newSocket->socket->readAll());

---

you think that all data are received.

I don't understand your idea? I had this code:

Code:

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command = QString::fromUtf8( newSocket->socket->readAll());

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in my program . In class MyThread, Socket receive data from server so bad. Data usually lose. Do you have idea to solution-problem?