cb26a4da69
[ChangeLog][Deprecation Notice] QAbstractSocket::error() (the signal) is deprecated; superseded by errorOccurred() Change-Id: I11e9c774d7c6096d1e9b37c451cf0b99188b6aad Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>
225 lines
8.4 KiB
C++
225 lines
8.4 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2017 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** BSD License Usage
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** Alternatively, you may use this file under the terms of the BSD license
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** as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <QtWidgets>
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#include <QtNetwork>
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#include "client.h"
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//! [0]
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Client::Client(QWidget *parent)
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: QDialog(parent)
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, hostCombo(new QComboBox)
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, portLineEdit(new QLineEdit)
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, getFortuneButton(new QPushButton(tr("Get Fortune")))
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, tcpSocket(new QTcpSocket(this))
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{
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setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);
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//! [0]
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hostCombo->setEditable(true);
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// find out name of this machine
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QString name = QHostInfo::localHostName();
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if (!name.isEmpty()) {
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hostCombo->addItem(name);
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QString domain = QHostInfo::localDomainName();
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if (!domain.isEmpty())
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hostCombo->addItem(name + QChar('.') + domain);
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}
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if (name != QLatin1String("localhost"))
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hostCombo->addItem(QString("localhost"));
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// find out IP addresses of this machine
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QList<QHostAddress> ipAddressesList = QNetworkInterface::allAddresses();
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// add non-localhost addresses
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for (int i = 0; i < ipAddressesList.size(); ++i) {
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if (!ipAddressesList.at(i).isLoopback())
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hostCombo->addItem(ipAddressesList.at(i).toString());
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}
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// add localhost addresses
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for (int i = 0; i < ipAddressesList.size(); ++i) {
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if (ipAddressesList.at(i).isLoopback())
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hostCombo->addItem(ipAddressesList.at(i).toString());
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}
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portLineEdit->setValidator(new QIntValidator(1, 65535, this));
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auto hostLabel = new QLabel(tr("&Server name:"));
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hostLabel->setBuddy(hostCombo);
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auto portLabel = new QLabel(tr("S&erver port:"));
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portLabel->setBuddy(portLineEdit);
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statusLabel = new QLabel(tr("This examples requires that you run the "
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"Fortune Server example as well."));
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getFortuneButton->setDefault(true);
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getFortuneButton->setEnabled(false);
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auto quitButton = new QPushButton(tr("Quit"));
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auto buttonBox = new QDialogButtonBox;
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buttonBox->addButton(getFortuneButton, QDialogButtonBox::ActionRole);
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buttonBox->addButton(quitButton, QDialogButtonBox::RejectRole);
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//! [1]
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in.setDevice(tcpSocket);
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in.setVersion(QDataStream::Qt_4_0);
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//! [1]
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connect(hostCombo, &QComboBox::editTextChanged,
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this, &Client::enableGetFortuneButton);
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connect(portLineEdit, &QLineEdit::textChanged,
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this, &Client::enableGetFortuneButton);
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connect(getFortuneButton, &QAbstractButton::clicked,
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this, &Client::requestNewFortune);
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connect(quitButton, &QAbstractButton::clicked, this, &QWidget::close);
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//! [2] //! [3]
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connect(tcpSocket, &QIODevice::readyRead, this, &Client::readFortune);
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//! [2] //! [4]
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connect(tcpSocket, &QAbstractSocket::errorOccurred,
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//! [3]
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this, &Client::displayError);
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//! [4]
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QGridLayout *mainLayout = nullptr;
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if (QGuiApplication::styleHints()->showIsFullScreen() || QGuiApplication::styleHints()->showIsMaximized()) {
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auto outerVerticalLayout = new QVBoxLayout(this);
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outerVerticalLayout->addItem(new QSpacerItem(0, 0, QSizePolicy::Ignored, QSizePolicy::MinimumExpanding));
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auto outerHorizontalLayout = new QHBoxLayout;
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outerHorizontalLayout->addItem(new QSpacerItem(0, 0, QSizePolicy::MinimumExpanding, QSizePolicy::Ignored));
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auto groupBox = new QGroupBox(QGuiApplication::applicationDisplayName());
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mainLayout = new QGridLayout(groupBox);
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outerHorizontalLayout->addWidget(groupBox);
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outerHorizontalLayout->addItem(new QSpacerItem(0, 0, QSizePolicy::MinimumExpanding, QSizePolicy::Ignored));
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outerVerticalLayout->addLayout(outerHorizontalLayout);
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outerVerticalLayout->addItem(new QSpacerItem(0, 0, QSizePolicy::Ignored, QSizePolicy::MinimumExpanding));
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} else {
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mainLayout = new QGridLayout(this);
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}
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mainLayout->addWidget(hostLabel, 0, 0);
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mainLayout->addWidget(hostCombo, 0, 1);
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mainLayout->addWidget(portLabel, 1, 0);
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mainLayout->addWidget(portLineEdit, 1, 1);
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mainLayout->addWidget(statusLabel, 2, 0, 1, 2);
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mainLayout->addWidget(buttonBox, 3, 0, 1, 2);
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setWindowTitle(QGuiApplication::applicationDisplayName());
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portLineEdit->setFocus();
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//! [5]
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}
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//! [5]
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//! [6]
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void Client::requestNewFortune()
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{
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getFortuneButton->setEnabled(false);
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tcpSocket->abort();
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//! [7]
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tcpSocket->connectToHost(hostCombo->currentText(),
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portLineEdit->text().toInt());
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//! [7]
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}
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//! [6]
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//! [8]
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void Client::readFortune()
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{
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in.startTransaction();
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QString nextFortune;
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in >> nextFortune;
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if (!in.commitTransaction())
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return;
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if (nextFortune == currentFortune) {
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QTimer::singleShot(0, this, &Client::requestNewFortune);
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return;
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}
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currentFortune = nextFortune;
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statusLabel->setText(currentFortune);
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getFortuneButton->setEnabled(true);
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}
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//! [8]
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//! [13]
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void Client::displayError(QAbstractSocket::SocketError socketError)
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{
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switch (socketError) {
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case QAbstractSocket::RemoteHostClosedError:
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break;
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case QAbstractSocket::HostNotFoundError:
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QMessageBox::information(this, tr("Fortune Client"),
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tr("The host was not found. Please check the "
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"host name and port settings."));
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break;
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case QAbstractSocket::ConnectionRefusedError:
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QMessageBox::information(this, tr("Fortune Client"),
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tr("The connection was refused by the peer. "
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"Make sure the fortune server is running, "
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"and check that the host name and port "
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"settings are correct."));
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break;
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default:
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QMessageBox::information(this, tr("Fortune Client"),
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tr("The following error occurred: %1.")
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.arg(tcpSocket->errorString()));
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}
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getFortuneButton->setEnabled(true);
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}
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//! [13]
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void Client::enableGetFortuneButton()
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{
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getFortuneButton->setEnabled(!hostCombo->currentText().isEmpty() &&
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!portLineEdit->text().isEmpty());
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}
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