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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include <QtWidgets>
#include <QtNetwork>
#include "client.h"
Client::Client(QWidget *parent)
: QDialog(parent),
hostLineEdit(new QLineEdit("fortune")),
getFortuneButton(new QPushButton(tr("Get Fortune"))),
statusLabel(new QLabel(tr("This examples requires that you run the "
"Local Fortune Server example as well."))),
socket(new QLocalSocket(this))
{
setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);
QLabel *hostLabel = new QLabel(tr("&Server name:"));
hostLabel->setBuddy(hostLineEdit);
statusLabel->setWordWrap(true);
getFortuneButton->setDefault(true);
QPushButton *quitButton = new QPushButton(tr("Quit"));
QDialogButtonBox *buttonBox = new QDialogButtonBox;
buttonBox->addButton(getFortuneButton, QDialogButtonBox::ActionRole);
buttonBox->addButton(quitButton, QDialogButtonBox::RejectRole);
in.setDevice(socket);
in.setVersion(QDataStream::Qt_5_10);
connect(hostLineEdit, &QLineEdit::textChanged,
this, &Client::enableGetFortuneButton);
connect(getFortuneButton, &QPushButton::clicked,
this, &Client::requestNewFortune);
connect(quitButton, &QPushButton::clicked, this, &Client::close);
connect(socket, &QLocalSocket::readyRead, this, &Client::readFortune);
connect(socket, &QLocalSocket::errorOccurred, this, &Client::displayError);
QGridLayout *mainLayout = new QGridLayout(this);
mainLayout->addWidget(hostLabel, 0, 0);
mainLayout->addWidget(hostLineEdit, 0, 1);
mainLayout->addWidget(statusLabel, 2, 0, 1, 2);
mainLayout->addWidget(buttonBox, 3, 0, 1, 2);
setWindowTitle(QGuiApplication::applicationDisplayName());
hostLineEdit->setFocus();
}
void Client::requestNewFortune()
{
getFortuneButton->setEnabled(false);
blockSize = 0;
socket->abort();
socket->connectToServer(hostLineEdit->text());
}
void Client::readFortune()
{
if (blockSize == 0) {
// Relies on the fact that QDataStream serializes a quint32 into
// sizeof(quint32) bytes
if (socket->bytesAvailable() < (int)sizeof(quint32))
return;
in >> blockSize;
}
if (socket->bytesAvailable() < blockSize || in.atEnd())
return;
QString nextFortune;
in >> nextFortune;
if (nextFortune == currentFortune) {
QTimer::singleShot(0, this, &Client::requestNewFortune);
return;
}
currentFortune = nextFortune;
statusLabel->setText(currentFortune);
getFortuneButton->setEnabled(true);
}
void Client::displayError(QLocalSocket::LocalSocketError socketError)
{
switch (socketError) {
case QLocalSocket::ServerNotFoundError:
QMessageBox::information(this, tr("Local Fortune Client"),
tr("The host was not found. Please make sure "
"that the server is running and that the "
"server name is correct."));
break;
case QLocalSocket::ConnectionRefusedError:
QMessageBox::information(this, tr("Local Fortune Client"),
tr("The connection was refused by the peer. "
"Make sure the fortune server is running, "
"and check that the server name "
"is correct."));
break;
case QLocalSocket::PeerClosedError:
break;
default:
QMessageBox::information(this, tr("Local Fortune Client"),
tr("The following error occurred: %1.")
.arg(socket->errorString()));
}
getFortuneButton->setEnabled(true);
}
void Client::enableGetFortuneButton()
{
getFortuneButton->setEnabled(!hostLineEdit->text().isEmpty());
}
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