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     3 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

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     7 ** This file is part of the examples of the Qt Toolkit.

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    16 ** GNU Lesser General Public License Usage

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    18 ** General Public License version 2.1 as published by the Free Software

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    40 ****************************************************************************/

    41 

    42 #include <QtGui>

    43 

    44 #include "chatdialog.h"

    45 

    46 ChatDialog::ChatDialog(QWidget *parent)

    47     : QDialog(parent)

    48 {

    49     setupUi(this);

    50 

    51     lineEdit->setFocusPolicy(Qt::StrongFocus);

    52     textEdit->setFocusPolicy(Qt::NoFocus);

    53     textEdit->setReadOnly(true);

    54     listWidget->setFocusPolicy(Qt::NoFocus);

    55 

    56     connect(lineEdit, SIGNAL(returnPressed()), this, SLOT(returnPressed()));

    57 #ifdef Q_OS_SYMBIAN

    58     connect(sendButton, SIGNAL(clicked()), this, SLOT(returnPressed()));

    59 #endif

    60     connect(lineEdit, SIGNAL(returnPressed()), this, SLOT(returnPressed()));

    61     connect(&client, SIGNAL(newMessage(QString,QString)),

    62             this, SLOT(appendMessage(QString,QString)));

    63     connect(&client, SIGNAL(newParticipant(QString)),

    64             this, SLOT(newParticipant(QString)));

    65     connect(&client, SIGNAL(participantLeft(QString)),

    66             this, SLOT(participantLeft(QString)));

    67 

    68     myNickName = client.nickName();

    69     newParticipant(myNickName);

    70     tableFormat.setBorder(0);

    71     QTimer::singleShot(10 * 1000, this, SLOT(showInformation()));

    72 }

    73 

    74 void ChatDialog::appendMessage(const QString &from, const QString &message)

    75 {

    76     if (from.isEmpty() || message.isEmpty())

    77         return;

    78 

    79     QTextCursor cursor(textEdit->textCursor());

    80     cursor.movePosition(QTextCursor::End);

    81     QTextTable *table = cursor.insertTable(1, 2, tableFormat);

    82     table->cellAt(0, 0).firstCursorPosition().insertText('<' + from + "> ");

    83     table->cellAt(0, 1).firstCursorPosition().insertText(message);

    84     QScrollBar *bar = textEdit->verticalScrollBar();

    85     bar->setValue(bar->maximum());

    86 }

    87 

    88 void ChatDialog::returnPressed()

    89 {

    90     QString text = lineEdit->text();

    91     if (text.isEmpty())

    92         return;

    93 

    94     if (text.startsWith(QChar('/'))) {

    95         QColor color = textEdit->textColor();

    96         textEdit->setTextColor(Qt::red);

    97         textEdit->append(tr("! Unknown command: %1")

    98                          .arg(text.left(text.indexOf(' '))));

    99         textEdit->setTextColor(color);

   100     } else {

   101         client.sendMessage(text);

   102         appendMessage(myNickName, text);

   103     }

   104 

   105     lineEdit->clear();

   106 }

   107 

   108 void ChatDialog::newParticipant(const QString &nick)

   109 {

   110     if (nick.isEmpty())

   111         return;

   112 

   113     QColor color = textEdit->textColor();

   114     textEdit->setTextColor(Qt::gray);

   115     textEdit->append(tr("* %1 has joined").arg(nick));

   116     textEdit->setTextColor(color);

   117     listWidget->addItem(nick);

   118 }

   119 

   120 void ChatDialog::participantLeft(const QString &nick)

   121 {

   122     if (nick.isEmpty())

   123         return;

   124 

   125     QList<QListWidgetItem *> items = listWidget->findItems(nick,

   126                                                            Qt::MatchExactly);

   127     if (items.isEmpty())

   128         return;

   129 

   130     delete items.at(0);

   131     QColor color = textEdit->textColor();

   132     textEdit->setTextColor(Qt::gray);

   133     textEdit->append(tr("* %1 has left").arg(nick));

   134     textEdit->setTextColor(color);

   135 }

   136 

   137 void ChatDialog::showInformation()

   138 {

   139     if (listWidget->count() == 1) {

   140         QMessageBox::information(this, tr("Chat"),

   141                                  tr("Launch several instances of this "

   142                                     "program on your local network and "

   143                                     "start chatting!"));

   144     }

   145 }