blockingclient.cpp Example File
network/blockingfortuneclient/blockingclient.cpp
#include <QtGui>
#include <QtNetwork>
#include "blockingclient.h"
BlockingClient::BlockingClient(QWidget *parent)
: QDialog(parent)
{
hostLabel = new QLabel(tr("&Server name:"), this);
portLabel = new QLabel(tr("S&erver port:"), this);
hostLineEdit = new QLineEdit("Localhost", this);
portLineEdit = new QLineEdit(this);
portLineEdit->setValidator(new QIntValidator(1, 65535, this));
hostLabel->setBuddy(hostLineEdit);
portLabel->setBuddy(portLineEdit);
statusLabel = new QLabel(tr("This examples requires that you run the "
"Fortune Server example as well."), this);
getFortuneButton = new QPushButton(tr("Get Fortune"), this);
getFortuneButton->setDefault(true);
getFortuneButton->setEnabled(false);
quitButton = new QPushButton(tr("Quit"), this);
connect(hostLineEdit, SIGNAL(textChanged(const QString &)),
this, SLOT(enableGetFortuneButton()));
connect(portLineEdit, SIGNAL(textChanged(const QString &)),
this, SLOT(enableGetFortuneButton()));
connect(getFortuneButton, SIGNAL(clicked()),
this, SLOT(requestNewFortune()));
connect(quitButton, SIGNAL(clicked()), this, SLOT(close()));
connect(&thread, SIGNAL(newFortune(const QString &)),
this, SLOT(showFortune(const QString &)));
connect(&thread, SIGNAL(error(int, const QString &)),
this, SLOT(displayError(int, const QString &)));
QHBoxLayout *buttonLayout = new QHBoxLayout;
buttonLayout->addStretch(1);
buttonLayout->addWidget(getFortuneButton);
buttonLayout->addWidget(quitButton);
QGridLayout *mainLayout = new QGridLayout(this);
mainLayout->addWidget(hostLabel, 0, 0);
mainLayout->addWidget(hostLineEdit, 0, 1);
mainLayout->addWidget(portLabel, 1, 0);
mainLayout->addWidget(portLineEdit, 1, 1);
mainLayout->addWidget(statusLabel, 2, 0, 1, 2);
mainLayout->addLayout(buttonLayout, 3, 0, 1, 2);
setWindowTitle(tr("Blocking Fortune Client"));
portLineEdit->setFocus();
}
void BlockingClient::requestNewFortune()
{
getFortuneButton->setEnabled(false);
thread.requestNewFortune(hostLineEdit->text(),
portLineEdit->text().toInt());
}
void BlockingClient::showFortune(const QString &nextFortune)
{
if (nextFortune == currentFortune) {
requestNewFortune();
return;
}
currentFortune = nextFortune;
statusLabel->setText(currentFortune);
getFortuneButton->setEnabled(true);
}
void BlockingClient::displayError(int socketError, const QString &message)
{
switch (socketError) {
case Qt::HostNotFoundError:
QMessageBox::information(this, tr("Blocking Fortune Client"),
tr("The host was not found. Please check the "
"host and port settings."));
break;
case Qt::ConnectionRefusedError:
QMessageBox::information(this, tr("Blocking 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("Blocking Fortune Client"),
tr("The following error occurred: %1.")
.arg(message));
}
getFortuneButton->setEnabled(true);
}
void BlockingClient::enableGetFortuneButton()
{
getFortuneButton->setEnabled(!hostLineEdit->text().isEmpty()
&& !portLineEdit->text().isEmpty());
}