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// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include <QtWidgets>
#include <QtNetwork>
#include "client.h"
//! [0]
Client::Client(QWidget *parent)
: QDialog(parent)
, hostCombo(new QComboBox)
, portLineEdit(new QLineEdit)
, getFortuneButton(new QPushButton(tr("Get Fortune")))
, tcpSocket(new QTcpSocket(this))
{
//! [0]
hostCombo->setEditable(true);
// find out name of this machine
QString name = QHostInfo::localHostName();
if (!name.isEmpty()) {
hostCombo->addItem(name);
QString domain = QHostInfo::localDomainName();
if (!domain.isEmpty())
hostCombo->addItem(name + QChar('.') + domain);
}
if (name != QLatin1String("localhost"))
hostCombo->addItem(QString("localhost"));
// find out IP addresses of this machine
const QList<QHostAddress> ipAddressesList = QNetworkInterface::allAddresses();
// add non-localhost addresses
for (const QHostAddress &entry : ipAddressesList) {
if (!entry.isLoopback())
hostCombo->addItem(entry.toString());
}
// add localhost addresses
for (const QHostAddress &entry : ipAddressesList) {
if (entry.isLoopback())
hostCombo->addItem(entry.toString());
}
portLineEdit->setValidator(new QIntValidator(1, 65535, this));
auto hostLabel = new QLabel(tr("&Server name:"));
hostLabel->setBuddy(hostCombo);
auto portLabel = new QLabel(tr("S&erver port:"));
portLabel->setBuddy(portLineEdit);
statusLabel = new QLabel(tr("This examples requires that you run the "
"Fortune Server example as well."));
getFortuneButton->setDefault(true);
getFortuneButton->setEnabled(false);
auto quitButton = new QPushButton(tr("Quit"));
auto buttonBox = new QDialogButtonBox;
buttonBox->addButton(getFortuneButton, QDialogButtonBox::ActionRole);
buttonBox->addButton(quitButton, QDialogButtonBox::RejectRole);
//! [1]
in.setDevice(tcpSocket);
in.setVersion(QDataStream::Qt_6_5);
//! [1]
connect(hostCombo, &QComboBox::editTextChanged,
this, &Client::enableGetFortuneButton);
connect(portLineEdit, &QLineEdit::textChanged,
this, &Client::enableGetFortuneButton);
connect(getFortuneButton, &QAbstractButton::clicked,
this, &Client::requestNewFortune);
connect(quitButton, &QAbstractButton::clicked, this, &QWidget::close);
//! [2] //! [3]
connect(tcpSocket, &QIODevice::readyRead, this, &Client::readFortune);
//! [2] //! [4]
connect(tcpSocket, &QAbstractSocket::errorOccurred,
//! [3]
this, &Client::displayError);
//! [4]
QGridLayout *mainLayout = nullptr;
if (QGuiApplication::styleHints()->showIsFullScreen() || QGuiApplication::styleHints()->showIsMaximized()) {
auto outerVerticalLayout = new QVBoxLayout(this);
outerVerticalLayout->addItem(new QSpacerItem(0, 0, QSizePolicy::Ignored, QSizePolicy::MinimumExpanding));
auto outerHorizontalLayout = new QHBoxLayout;
outerHorizontalLayout->addItem(new QSpacerItem(0, 0, QSizePolicy::MinimumExpanding, QSizePolicy::Ignored));
auto groupBox = new QGroupBox(QGuiApplication::applicationDisplayName());
mainLayout = new QGridLayout(groupBox);
outerHorizontalLayout->addWidget(groupBox);
outerHorizontalLayout->addItem(new QSpacerItem(0, 0, QSizePolicy::MinimumExpanding, QSizePolicy::Ignored));
outerVerticalLayout->addLayout(outerHorizontalLayout);
outerVerticalLayout->addItem(new QSpacerItem(0, 0, QSizePolicy::Ignored, QSizePolicy::MinimumExpanding));
} else {
mainLayout = new QGridLayout(this);
}
mainLayout->addWidget(hostLabel, 0, 0);
mainLayout->addWidget(hostCombo, 0, 1);
mainLayout->addWidget(portLabel, 1, 0);
mainLayout->addWidget(portLineEdit, 1, 1);
mainLayout->addWidget(statusLabel, 2, 0, 1, 2);
mainLayout->addWidget(buttonBox, 3, 0, 1, 2);
setWindowTitle(QGuiApplication::applicationDisplayName());
portLineEdit->setFocus();
//! [5]
}
//! [5]
//! [6]
void Client::requestNewFortune()
{
getFortuneButton->setEnabled(false);
tcpSocket->abort();
//! [7]
tcpSocket->connectToHost(hostCombo->currentText(),
portLineEdit->text().toInt());
//! [7]
}
//! [6]
//! [8]
void Client::readFortune()
{
in.startTransaction();
QString nextFortune;
in >> nextFortune;
if (!in.commitTransaction())
return;
if (nextFortune == currentFortune) {
QTimer::singleShot(0, this, &Client::requestNewFortune);
return;
}
currentFortune = nextFortune;
statusLabel->setText(currentFortune);
getFortuneButton->setEnabled(true);
}
//! [8]
//! [13]
void Client::displayError(QAbstractSocket::SocketError socketError)
{
switch (socketError) {
case QAbstractSocket::RemoteHostClosedError:
break;
case QAbstractSocket::HostNotFoundError:
QMessageBox::information(this, tr("Fortune Client"),
tr("The host was not found. Please check the "
"host name and port settings."));
break;
case QAbstractSocket::ConnectionRefusedError:
QMessageBox::information(this, tr("Fortune Client"),
tr("The connection was refused by the peer. "
"Make sure the fortune server is running, "
"and check that the host name and port "
"settings are correct."));
break;
default:
QMessageBox::information(this, tr("Fortune Client"),
tr("The following error occurred: %1.")
.arg(tcpSocket->errorString()));
}
getFortuneButton->setEnabled(true);
}
//! [13]
void Client::enableGetFortuneButton()
{
getFortuneButton->setEnabled(!hostCombo->currentText().isEmpty() &&
!portLineEdit->text().isEmpty());
}
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