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| |
| #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()); |
| } |