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authoraxis <qt-info@nokia.com>2009-04-24 11:34:15 (GMT)
committeraxis <qt-info@nokia.com>2009-04-24 11:34:15 (GMT)
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treea17e1a767a89542ab59907462206d7dcf2e504b2 /examples/network/network-chat/chatdialog.cpp
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Long live Qt for S60!
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@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()));
+ connect(&client, SIGNAL(newMessage(const QString &, const QString &)),
+ this, SLOT(appendMessage(const QString &, const QString &)));
+ connect(&client, SIGNAL(newParticipant(const QString &)),
+ this, SLOT(newParticipant(const QString &)));
+ connect(&client, SIGNAL(participantLeft(const QString &)),
+ this, SLOT(participantLeft(const 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!"));
+ }
+}