chat.cpp 范例文件

chat/chat.cpp
/**************************************************************************** ** ** Copyright (C) 2016 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see https://www.qt.io/terms-conditions. For further ** information use the contact form at https://www.qt.io/contact-us. ** ** BSD License Usage ** Alternatively, you may use this file under the terms of the BSD license ** as follows: ** ** "Redistribution and use in source and binary forms, with or without ** modification, are permitted provided that the following conditions are ** met: ** * Redistributions of source code must retain the above copyright ** notice, this list of conditions and the following disclaimer. ** * Redistributions in binary form must reproduce the above copyright ** notice, this list of conditions and the following disclaimer in ** the documentation and/or other materials provided with the ** distribution. ** * Neither the name of The Qt Company Ltd nor the names of its ** contributors may be used to endorse or promote products derived ** from this software without specific prior written permission. ** ** ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." ** ** $QT_END_LICENSE$ ** ****************************************************************************/
#include <QApplication> #include <QMessageBox> #include "chat.h" #include "chat_adaptor.h" #include "chat_interface.h" ChatMainWindow::ChatMainWindow() : m_nickname(QLatin1String("nickname")) { setupUi(this); sendButton->setEnabled(false); connect(messageLineEdit, SIGNAL(textChanged(QString)), this, SLOT(textChangedSlot(QString))); connect(sendButton, SIGNAL(clicked(bool)), this, SLOT(sendClickedSlot())); connect(actionChangeNickname, SIGNAL(triggered(bool)), this, SLOT(changeNickname())); connect(actionAboutQt, SIGNAL(triggered(bool)), this, SLOT(aboutQt())); connect(qApp, SIGNAL(lastWindowClosed()), this, SLOT(exiting())); // add our D-Bus interface and connect to D-Bus new ChatAdaptor(this); QDBusConnection::sessionBus().registerObject("/", this); org::example::chat *iface; iface = new org::example::chat(QString(), QString(), QDBusConnection::sessionBus(), this); //connect(iface, SIGNAL(message(QString,QString)), this, SLOT(messageSlot(QString,QString))); QDBusConnection::sessionBus().connect(QString(), QString(), "org.example.chat", "message", this, SLOT(messageSlot(QString,QString))); connect(iface, SIGNAL(action(QString,QString)), this, SLOT(actionSlot(QString,QString))); NicknameDialog dialog; dialog.cancelButton->setVisible(false); dialog.exec(); m_nickname = dialog.nickname->text().trimmed(); emit action(m_nickname, QLatin1String("joins the chat")); } ChatMainWindow::~ChatMainWindow() { } void ChatMainWindow::rebuildHistory() { QString history = m_messages.join( QLatin1String("\n" ) ); chatHistory->setPlainText(history); } void ChatMainWindow::messageSlot(const QString &nickname, const QString &text) { QString msg( QLatin1String("<%1> %2") ); msg = msg.arg(nickname, text); m_messages.append(msg); if (m_messages.count() > 100) m_messages.removeFirst(); rebuildHistory(); } void ChatMainWindow::actionSlot(const QString &nickname, const QString &text) { QString msg( QLatin1String("* %1 %2") ); msg = msg.arg(nickname, text); m_messages.append(msg); if (m_messages.count() > 100) m_messages.removeFirst(); rebuildHistory(); } void ChatMainWindow::textChangedSlot(const QString &newText) { sendButton->setEnabled(!newText.isEmpty()); } void ChatMainWindow::sendClickedSlot() { //emit message(m_nickname, messageLineEdit->text()); QDBusMessage msg = QDBusMessage::createSignal("/", "org.example.chat", "message"); msg << m_nickname << messageLineEdit->text(); QDBusConnection::sessionBus().send(msg); messageLineEdit->setText(QString()); } void ChatMainWindow::changeNickname() { NicknameDialog dialog(this); if (dialog.exec() == QDialog::Accepted) { QString old = m_nickname; m_nickname = dialog.nickname->text().trimmed(); emit action(old, QString("is now known as %1").arg(m_nickname)); } } void ChatMainWindow::aboutQt() { QMessageBox::aboutQt(this); } void ChatMainWindow::exiting() { emit action(m_nickname, QLatin1String("leaves the chat")); } NicknameDialog::NicknameDialog(QWidget *parent) : QDialog(parent) { setupUi(this); } int main(int argc, char **argv) { QApplication app(argc, argv); if (!QDBusConnection::sessionBus().isConnected()) { qWarning("Cannot connect to the D-Bus session bus.\n" "Please check your system settings and try again.\n"); return 1; } ChatMainWindow chat; chat.show(); return app.exec(); }