ftpwindow.cpp Example File
network/qftp/ftpwindow.cpp
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#include <QtGui>
#include <QtNetwork>
#include "ftpwindow.h"
FtpWindow::FtpWindow(QWidget *parent)
: QDialog(parent), ftp(0), networkSession(0)
{
ftpServerLabel = new QLabel(tr("Ftp &server:"));
ftpServerLineEdit = new QLineEdit("ftp.qt.nokia.com");
ftpServerLabel->setBuddy(ftpServerLineEdit);
statusLabel = new QLabel(tr("Please enter the name of an FTP server."));
#if defined(Q_OS_SYMBIAN) || defined(Q_WS_MAEMO_5) || defined(Q_WS_SIMULATOR)
// Use word wrapping to fit the text on screen
statusLabel->setWordWrap( true );
#endif
fileList = new QTreeWidget;
fileList->setEnabled(false);
fileList->setRootIsDecorated(false);
fileList->setHeaderLabels(QStringList() << tr("Name") << tr("Size") << tr("Owner") << tr("Group") << tr("Time"));
fileList->header()->setStretchLastSection(false);
connectButton = new QPushButton(tr("Connect"));
connectButton->setDefault(true);
cdToParentButton = new QPushButton;
cdToParentButton->setIcon(QPixmap(":/images/cdtoparent.png"));
cdToParentButton->setEnabled(false);
downloadButton = new QPushButton(tr("Download"));
downloadButton->setEnabled(false);
quitButton = new QPushButton(tr("Quit"));
buttonBox = new QDialogButtonBox;
buttonBox->addButton(downloadButton, QDialogButtonBox::ActionRole);
buttonBox->addButton(quitButton, QDialogButtonBox::RejectRole);
progressDialog = new QProgressDialog(this);
connect(fileList, SIGNAL(itemActivated(QTreeWidgetItem*,int)),
this, SLOT(processItem(QTreeWidgetItem*,int)));
connect(fileList, SIGNAL(currentItemChanged(QTreeWidgetItem*,QTreeWidgetItem*)),
this, SLOT(enableDownloadButton()));
connect(progressDialog, SIGNAL(canceled()), this, SLOT(cancelDownload()));
connect(connectButton, SIGNAL(clicked()), this, SLOT(connectOrDisconnect()));
connect(cdToParentButton, SIGNAL(clicked()), this, SLOT(cdToParent()));
connect(downloadButton, SIGNAL(clicked()), this, SLOT(downloadFile()));
connect(quitButton, SIGNAL(clicked()), this, SLOT(close()));
QHBoxLayout *topLayout = new QHBoxLayout;
topLayout->addWidget(ftpServerLabel);
topLayout->addWidget(ftpServerLineEdit);
#ifndef Q_OS_SYMBIAN
topLayout->addWidget(cdToParentButton);
topLayout->addWidget(connectButton);
#else
// Make app better lookin on small screen
QHBoxLayout *topLayout2 = new QHBoxLayout;
topLayout2->addWidget(cdToParentButton);
topLayout2->addWidget(connectButton);
#endif
QVBoxLayout *mainLayout = new QVBoxLayout;
mainLayout->addLayout(topLayout);
#ifdef Q_OS_SYMBIAN
// Make app better lookin on small screen
mainLayout->addLayout(topLayout2);
#endif
mainLayout->addWidget(fileList);
mainLayout->addWidget(statusLabel);
mainLayout->addWidget(buttonBox);
setLayout(mainLayout);
setWindowTitle(tr("FTP"));
}
QSize FtpWindow::sizeHint() const
{
return QSize(500, 300);
}
void FtpWindow::connectOrDisconnect()
{
if (ftp) {
ftp->abort();
ftp->deleteLater();
ftp = 0;
fileList->setEnabled(false);
cdToParentButton->setEnabled(false);
downloadButton->setEnabled(false);
connectButton->setEnabled(true);
connectButton->setText(tr("Connect"));
#ifndef QT_NO_CURSOR
setCursor(Qt::ArrowCursor);
#endif
statusLabel->setText(tr("Please enter the name of an FTP server."));
return;
}
#ifndef QT_NO_CURSOR
setCursor(Qt::WaitCursor);
#endif
if (!networkSession || !networkSession->isOpen()) {
if (manager.capabilities() & QNetworkConfigurationManager::NetworkSessionRequired) {
if (!networkSession) {
// Get saved network configuration
QSettings settings(QSettings::UserScope, QLatin1String("Trolltech"));
settings.beginGroup(QLatin1String("QtNetwork"));
const QString id = settings.value(QLatin1String("DefaultNetworkConfiguration")).toString();
settings.endGroup();
// If the saved network configuration is not currently discovered use the system default
QNetworkConfiguration config = manager.configurationFromIdentifier(id);
if ((config.state() & QNetworkConfiguration::Discovered) !=
QNetworkConfiguration::Discovered) {
config = manager.defaultConfiguration();
}
networkSession = new QNetworkSession(config, this);
connect(networkSession, SIGNAL(opened()), this, SLOT(connectToFtp()));
connect(networkSession, SIGNAL(error(QNetworkSession::SessionError)), this, SLOT(enableConnectButton()));
}
connectButton->setEnabled(false);
statusLabel->setText(tr("Opening network session."));
networkSession->open();
return;
}
}
connectToFtp();
}
void FtpWindow::connectToFtp()
{
ftp = new QFtp(this);
connect(ftp, SIGNAL(commandFinished(int,bool)),
this, SLOT(ftpCommandFinished(int,bool)));
connect(ftp, SIGNAL(listInfo(QUrlInfo)),
this, SLOT(addToList(QUrlInfo)));
connect(ftp, SIGNAL(dataTransferProgress(qint64,qint64)),
this, SLOT(updateDataTransferProgress(qint64,qint64)));
fileList->clear();
currentPath.clear();
isDirectory.clear();
QUrl url(ftpServerLineEdit->text());
if (!url.isValid() || url.scheme().toLower() != QLatin1String("ftp")) {
ftp->connectToHost(ftpServerLineEdit->text(), 21);
ftp->login();
} else {
ftp->connectToHost(url.host(), url.port(21));
if (!url.userName().isEmpty())
ftp->login(QUrl::fromPercentEncoding(url.userName().toLatin1()), url.password());
else
ftp->login();
if (!url.path().isEmpty())
ftp->cd(url.path());
}
fileList->setEnabled(true);
connectButton->setEnabled(false);
connectButton->setText(tr("Disconnect"));
statusLabel->setText(tr("Connecting to FTP server %1...")
.arg(ftpServerLineEdit->text()));
}
void FtpWindow::downloadFile()
{
QString fileName = fileList->currentItem()->text(0);
//
if (QFile::exists(fileName)) {
QMessageBox::information(this, tr("FTP"),
tr("There already exists a file called %1 in "
"the current directory.")
.arg(fileName));
return;
}
file = new QFile(fileName);
if (!file->open(QIODevice::WriteOnly)) {
QMessageBox::information(this, tr("FTP"),
tr("Unable to save the file %1: %2.")
.arg(fileName).arg(file->errorString()));
delete file;
return;
}
ftp->get(fileList->currentItem()->text(0), file);
progressDialog->setLabelText(tr("Downloading %1...").arg(fileName));
downloadButton->setEnabled(false);
progressDialog->exec();
}
void FtpWindow::cancelDownload()
{
ftp->abort();
if (file->exists()) {
file->close();
file->remove();
}
delete file;
}
void FtpWindow::ftpCommandFinished(int, bool error)
{
#ifndef QT_NO_CURSOR
setCursor(Qt::ArrowCursor);
#endif
if (ftp->currentCommand() == QFtp::ConnectToHost) {
if (error) {
QMessageBox::information(this, tr("FTP"),
tr("Unable to connect to the FTP server "
"at %1. Please check that the host "
"name is correct.")
.arg(ftpServerLineEdit->text()));
connectOrDisconnect();
return;
}
statusLabel->setText(tr("Logged onto %1.")
.arg(ftpServerLineEdit->text()));
fileList->setFocus();
downloadButton->setDefault(true);
connectButton->setEnabled(true);
return;
}
if (ftp->currentCommand() == QFtp::Login)
ftp->list();
if (ftp->currentCommand() == QFtp::Get) {
if (error) {
statusLabel->setText(tr("Canceled download of %1.")
.arg(file->fileName()));
file->close();
file->remove();
} else {
statusLabel->setText(tr("Downloaded %1 to current directory.")
.arg(file->fileName()));
file->close();
}
delete file;
enableDownloadButton();
progressDialog->hide();
} else if (ftp->currentCommand() == QFtp::List) {
if (isDirectory.isEmpty()) {
fileList->addTopLevelItem(new QTreeWidgetItem(QStringList() << tr("<empty>")));
fileList->setEnabled(false);
}
}
}
void FtpWindow::addToList(const QUrlInfo &urlInfo)
{
QTreeWidgetItem *item = new QTreeWidgetItem;
item->setText(0, urlInfo.name());
item->setText(1, QString::number(urlInfo.size()));
item->setText(2, urlInfo.owner());
item->setText(3, urlInfo.group());
item->setText(4, urlInfo.lastModified().toString("MMM dd yyyy"));
QPixmap pixmap(urlInfo.isDir() ? ":/images/dir.png" : ":/images/file.png");
item->setIcon(0, pixmap);
isDirectory[urlInfo.name()] = urlInfo.isDir();
fileList->addTopLevelItem(item);
if (!fileList->currentItem()) {
fileList->setCurrentItem(fileList->topLevelItem(0));
fileList->setEnabled(true);
}
}
void FtpWindow::processItem(QTreeWidgetItem *item, int /*column*/)
{
QString name = item->text(0);
if (isDirectory.value(name)) {
fileList->clear();
isDirectory.clear();
currentPath += '/';
currentPath += name;
ftp->cd(name);
ftp->list();
cdToParentButton->setEnabled(true);
#ifndef QT_NO_CURSOR
setCursor(Qt::WaitCursor);
#endif
return;
}
}
void FtpWindow::cdToParent()
{
#ifndef QT_NO_CURSOR
setCursor(Qt::WaitCursor);
#endif
fileList->clear();
isDirectory.clear();
currentPath = currentPath.left(currentPath.lastIndexOf('/'));
if (currentPath.isEmpty()) {
cdToParentButton->setEnabled(false);
ftp->cd("/");
} else {
ftp->cd(currentPath);
}
ftp->list();
}
void FtpWindow::updateDataTransferProgress(qint64 readBytes,
qint64 totalBytes)
{
progressDialog->setMaximum(totalBytes);
progressDialog->setValue(readBytes);
}
void FtpWindow::enableDownloadButton()
{
QTreeWidgetItem *current = fileList->currentItem();
if (current) {
QString currentFile = current->text(0);
downloadButton->setEnabled(!isDirectory.value(currentFile));
} else {
downloadButton->setEnabled(false);
}
}
void FtpWindow::enableConnectButton()
{
// Save the used configuration
QNetworkConfiguration config = networkSession->configuration();
QString id;
if (config.type() == QNetworkConfiguration::UserChoice)
id = networkSession->sessionProperty(QLatin1String("UserChoiceConfiguration")).toString();
else
id = config.identifier();
QSettings settings(QSettings::UserScope, QLatin1String("Trolltech"));
settings.beginGroup(QLatin1String("QtNetwork"));
settings.setValue(QLatin1String("DefaultNetworkConfiguration"), id);
settings.endGroup();
connectButton->setEnabled(true);
statusLabel->setText(tr("Please enter the name of an FTP server."));
}
