/****************************************************************************

**

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

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

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

**

** $QT_BEGIN_LICENSE:LGPL$

** No Commercial Usage

** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

**

** GNU Lesser General Public License Usage

** Alternatively, this file may be used under the terms of the GNU Lesser

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

** Foundation and appearing in the file LICENSE.LGPL included in the

** packaging of this file.  Please review the following information to

** ensure the GNU Lesser General Public License version 2.1 requirements

** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at qt-info@nokia.com.

**

**

**

**

**

**

**

**

** $QT_END_LICENSE$

**

****************************************************************************/

#include <QtGui>

#include "chatdialog.h"

ChatDialog::ChatDialog(QWidget *parent)

    : QDialog(parent)

{

    setupUi(this);

    lineEdit->setFocusPolicy(Qt::StrongFocus);

    textEdit->setFocusPolicy(Qt::NoFocus);

    textEdit->setReadOnly(true);

    listWidget->setFocusPolicy(Qt::NoFocus);

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

#ifdef Q_OS_SYMBIAN

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

#endif

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

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

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

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

            this, SLOT(newParticipant(QString)));

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

            this, SLOT(participantLeft(QString)));

    myNickName = client.nickName();

    newParticipant(myNickName);

    tableFormat.setBorder(0);

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

}

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

{

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

        return;

    QTextCursor cursor(textEdit->textCursor());

    cursor.movePosition(QTextCursor::End);

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

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

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

    QScrollBar *bar = textEdit->verticalScrollBar();

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

}

void ChatDialog::returnPressed()

{

    QString text = lineEdit->text();

    if (text.isEmpty())

        return;

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

        QColor color = textEdit->textColor();

        textEdit->setTextColor(Qt::red);

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

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

        textEdit->setTextColor(color);

    } else {

        client.sendMessage(text);

        appendMessage(myNickName, text);

    }

    lineEdit->clear();

}

void ChatDialog::newParticipant(const QString &nick)

{

    if (nick.isEmpty())

        return;

    QColor color = textEdit->textColor();

    textEdit->setTextColor(Qt::gray);

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

    textEdit->setTextColor(color);

    listWidget->addItem(nick);

}

void ChatDialog::participantLeft(const QString &nick)

{

    if (nick.isEmpty())

        return;

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

                                                           Qt::MatchExactly);

    if (items.isEmpty())

        return;

    delete items.at(0);

    QColor color = textEdit->textColor();

    textEdit->setTextColor(Qt::gray);

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

    textEdit->setTextColor(color);

}

void ChatDialog::showInformation()

{

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

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

                                 tr("Launch several instances of this "

                                    "program on your local network and "

                                    "start chatting!"));

    }

}