QT Realization LAN Chat tool

Three years ago just learned to write a QT LAN chat tool small project.

Because it is a beginner qt writing, the code is relatively simple, there is no time to tidy up the project, only for everyone to refer to the relevant TCP and UDP connection and transmission functions and related controls basic use method.

Need to learn the source of e-mail ~

1. Client program Function description

       Connection server:        tcpsocket = new Qtcpsocket (this);        Tcpsocket->connecttohost (serverip,8000);      Disconnect server:        tcpsocket->disconnectfromhost ();

2. Server-Side Program description

            if (Tcpserver->listen (Qhostaddress::any, i)) {              ui->textedit->append ("Listen ok!");             } else{              ui->textedit->append ("Listen error!");             }

3. File Transfer Module

     Send side: Udpsocket = new Qudpsocket (this);   Udpsocket->bind (Qhostaddress::any, 7758);    Connect (Udpsocket, SIGNAL (Readyread ()), This,slot (Readpendingdatagrams ()));    Receive side: Connect (Udpsocket, SIGNAL (Readyread ()), this, SLOT (Readpendingdatagrams ()));    File.setfilename (Filee);    if (!file.open (qiodevice::writeonly | Qiodevice::append | qiodevice::unbuffered))          return;

4 Program Interface

5. Main functions


5.1 Get the native IP address

  QString Feiq_3::getip ()  //Get IP Address {    qlist<qhostaddress> list =  qnetworkinterface::alladdresses ();    foreach (qhostaddress address, list) {       if (address.protocol () = = Qabstractsocket::ipv4protocol) {           if ( Address.tostring (). Contains ("127.0.")) {               continue;}           return address.tostring ();       }    }    return 0;}

5.2 Getting a list of online users

void feiq_3::on_pushbutton_in_clicked ()//connection server key {    QString ServerIP = Ui->lineedit_server->text ();    Connecttoserver (ServerIP);    Ipname.append ("%");    Ipname.append (IP);    Ipname.append ("%");    Ipname.append (Ui->lineedit_name->text ());    Tcpsocket->write (ipname);    Connect (tcpsocket,signal (Readyread ()), this, SLOT (Readmessage ()));} if (Tmp.contains ("   @")) {        ui->listwidget->clear ();        TM = Tmp.split ("   @");        for (int i = 0; i < tm.count (); i + +) {                Ui->listwidget->additem (tm.at (i));        } ｝

5.3 Private Chat Module

else if (Tmp.startswith ("&&")) {        sm = tmp.split ("&&");        if (sm.at (3) = = IP) {            bbb->chuanmessage ("<font color=blue>[self]</font>" + sm.at (3) + ":<br>" + SM . at (2));            if (sm.at (1) = = IP) {                bbb->chuanmessage ("<font color=red>[each other]</font>" + sm.at (3) + ":<br>" + sm.at (2));            }        }        if (sm.at (1) = = IP) {            if (sm.at (3)! = IP) {                bbb->show ();                Bbb->chuanip (sm.at (3), Ui->lineedit_server->text ());                Bbb->chuanmessage ("<font color=red>[]</font>" + sm.at (3) + ":<br>" + sm.at (2));}            }    

5.4 Select File Features

Fdialog = new Qfiledialog (this);    Fdialog->setfilemode (qfiledialog::existingfiles);    Connect (fdialog,signal (fileselected (const QString &)), This,slot (FS (const QString &));    Fdialog->hide (); void Dialog::fs (const QString & FS) {    //Select File Click Open to start the signal until a single file is opened    Qdebug () < < "FS" <<fs;    Files.clear ();    Files.append (fs);}

5.5 File transfer send-side

void Dialog::senddata () {if (!file.atend ()) {Qbytearray line = File.read (8000);        Udpsocket->writedatagram (Line,qhostaddress (Iprec), 7755);        i++; Qdebug () << "Send over!"        << i << line.size ();            if (Line.size () <8000) {Qbytearray yes; Yes.append ("*^* File receive complete!            ");            Tcpsocket->write (yes); Qmessagebox::warning (THIS,TR ("Notification"), TR ("Send success!")        "), Qmessagebox::yes);        }}}void Dialog::readpendingdatagrams () {while (Udpsocket->haspendingdatagrams ()) {Qbytearray datagram;        Datagram.resize (Udpsocket->pendingdatagramsize ());        Qhostaddress Sender;        Quint16 Senderport;        Udpsocket->readdatagram (Datagram.data (), Datagram.size (), &sender, &senderport);        Qdebug () << datagram;            if (datagram = = "1") {Qdebug () << "Send ok!";        SendData (); }    }}

5.6 File Transfer Receive end

void Dialogrec::initsocket () {    connect (udpsocket, SIGNAL (Readyread ()), this            , SLOT (Readpendingdatagrams ())) ;    File.setfilename (Filee);    if (!file.open (qiodevice::writeonly | Qiodevice::append | qiodevice::unbuffered))        return;    Filee.clear ();} void Dialogrec::readpendingdatagrams () {    int i = 0;        Receive    while (Udpsocket->haspendingdatagrams ()) {        Qbytearray datagram;        Datagram.resize (Udpsocket->pendingdatagramsize ());        Qhostaddress Sender;        Quint16 Senderport;        Udpsocket->readdatagram (Datagram.data (), Datagram.size (), &sender, &senderport);        File.write (Datagram.data (), datagram.size ());        i++;        Udpsocket->writedatagram ("1", 1, sender, 7758);        Qdebug () << i << datagram.size ();    }}

5.7 Window beautification (in the Private Chat window, add "Spring", "Summer", "Autumn", "winter" four kinds of skin.)

void dialog::on_combobox_currentindexchanged (int index) {    if (index==0) {        map.load ("./icon/1.jpg");        Map = map.scaled (qsize (390,330));        Ui->label_back->setpixmap (map);}    if (index==1) {        map.load ("./icon/2.jpg");        Map = map.scaled (qsize (390,330));        Ui->label_back->setpixmap (map);}    if (index==2) {        map.load ("./icon/3.jpg");        Map = map.scaled (qsize (390,330));        Ui->label_back->setpixmap (map);}    if (index==3) {        map.load ("./icon/4.jpg");        Map = map.scaled (qsize (390,330));        Ui->label_back->setpixmap (map);}}

QT Realization LAN Chat tool