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