[Qt-interest] QTcpSocket receives a string

[Stefanos Antaris]

Hello.I have tried to make an app using the fortune client example but 
it doesn't work.I don't know if i am connected or not due to the fact 
that the errorstring that i have made don't display in a sensorLineEdit 
that i have in my ui file.Can anyone check if it is allright?I just want 
to receive a string of a non qt application.Thanks in advance.
Sensor.h
[code]
#ifndef SENSORS_H
#define SENSORS_H

#include <QtGui/QDialog>
#include <QtNetwork>
#include "ui_sensors.h"
class QDialogButtonBox;
class QLabel;
class QLineEdit;
class QPushButton;
class QTcpSocket;


class Sensors : public QDialog ,public Ui::SensorsClass
{
    Q_OBJECT

public:
    Sensors(QWidget *parent = 0);
    ~Sensors();
    void requestSensors();
    void readSensors();
    void displayError(QAbstractSocket::SocketError socketError);
    void enableGetSensorButton();



private:

    QTcpSocket* tcpSocket;
    Ui::SensorsClass *ui;
    QString currentSensor;
    quint16 blockSize;
};

#endif // SENSORS_H

[/code]

sensor.cpp
[code]
#include "sensors.h"
#include <QtGui>
#include <QtNetwork>

Sensors::Sensors(QWidget *parent)
    : QDialog(parent)
{
    setupUi(this);
    tcpSocket=new QTcpSocket(this);

    connect(connectButton,SIGNAL(clicked()),this,SLOT(requestSensors()));
    connect(disconnectButton,SIGNAL(clicked()),this,SLOT(close()));
    connect(tcpSocket,SIGNAL(readyRead()),this,SLOT(readSensors()));
    
connect(tcpSocket,SIGNAL(error(QAbstractSocket::SocketError)),this,SLOT(displayError(QAbstractSocket::SocketError)));

}

Sensors::~Sensors()
{
    delete ui;
}

void Sensors::requestSensors()
{
    sensorLineEdit->setText("request test");
    blockSize=0;
    tcpSocket->abort();
    tcpSocket->connectToHost("192.168.1.150",5444);
}

void Sensors::readSensors()
{
    QDataStream in(tcpSocket);
    in.setVersion(QDataStream::Qt_4_0);
    if(blockSize==0){
        if(tcpSocket->bytesAvailable()<(int)sizeof(quint16))
            return;
        in>>blockSize;
    }
    if(tcpSocket->bytesAvailable()<blockSize)
        return;
    QString nextSensor;
    in>>nextSensor;
    if(nextSensor==currentSensor){
        QTimer::singleShot(0,this,SLOT(requestSensors()));
        return;
    }
    currentSensor=nextSensor;
    sensorLineEdit->setText(currentSensor);
}

void Sensors::displayError(QAbstractSocket::SocketError socketError)
{
    switch(socketError)
    {
        case QAbstractSocket::RemoteHostClosedError:{
                sensorLineEdit->setText("Remote Host Closed Error");
                break;
            }
        case QAbstractSocket::HostNotFoundError:
            sensorLineEdit->setText("Host not found Error");
       // QMessageBox::information(this,tr("Sensor Client"),
         //                        tr("The host was not found."));
        case QAbstractSocket::ConnectionRefusedError:
            sensorLineEdit->setText("Connection Refused Error");
        //QMessageBox::information(this,tr("Fortune Client"),tr("The 
connection was refused by the peer.Make sure the Sensor Server is 
runnung"));
        default:
            sensorLineEdit->setText("unknown error");\
        //QMessageBox::information(this,tr("Sensor Client"),
          //                       tr("The following error 
occured:%1.").arg(tcpSocket->errorString()));
    }

}
[/code]
Thanks in advance