/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the examples of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#include <QtGui>+
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#include <QtNetwork>+
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+
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#include "ftpwindow.h"+
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+
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#ifdef Q_OS_SYMBIAN+
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#include "sym_iap_util.h"+
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#endif+
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+
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FtpWindow::FtpWindow(QWidget *parent)+
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    : QDialog(parent), ftp(0)+
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{+
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    ftpServerLabel = new QLabel(tr("Ftp &server:"));+
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    ftpServerLineEdit = new QLineEdit("ftp.qt.nokia.com");+
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    ftpServerLabel->setBuddy(ftpServerLineEdit);+
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+
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    statusLabel = new QLabel(tr("Please enter the name of an FTP server."));+
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#ifdef Q_OS_SYMBIAN+
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    // Use word wrapping to fit the text on screen+
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    statusLabel->setWordWrap( true );+
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#endif+
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+
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    fileList = new QTreeWidget;+
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    fileList->setEnabled(false);+
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    fileList->setRootIsDecorated(false);+
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    fileList->setHeaderLabels(QStringList() << tr("Name") << tr("Size") << tr("Owner") << tr("Group") << tr("Time"));+
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    fileList->header()->setStretchLastSection(false);+
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+
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    connectButton = new QPushButton(tr("Connect"));+
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    connectButton->setDefault(true);+
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+
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    cdToParentButton = new QPushButton;+
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    cdToParentButton->setIcon(QPixmap(":/images/cdtoparent.png"));+
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    cdToParentButton->setEnabled(false);+
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+
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    downloadButton = new QPushButton(tr("Download"));+
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    downloadButton->setEnabled(false);+
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+
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    quitButton = new QPushButton(tr("Quit"));+
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+
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    buttonBox = new QDialogButtonBox;+
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    buttonBox->addButton(downloadButton, QDialogButtonBox::ActionRole);+
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    buttonBox->addButton(quitButton, QDialogButtonBox::RejectRole);+
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+
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    progressDialog = new QProgressDialog(this);+
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+
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    connect(fileList, SIGNAL(itemActivated(QTreeWidgetItem*,int)),+
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            this, SLOT(processItem(QTreeWidgetItem*,int)));+
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    connect(fileList, SIGNAL(currentItemChanged(QTreeWidgetItem*,QTreeWidgetItem*)),+
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            this, SLOT(enableDownloadButton()));+
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    connect(progressDialog, SIGNAL(canceled()), this, SLOT(cancelDownload()));+
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    connect(connectButton, SIGNAL(clicked()), this, SLOT(connectOrDisconnect()));+
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    connect(cdToParentButton, SIGNAL(clicked()), this, SLOT(cdToParent()));+
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    connect(downloadButton, SIGNAL(clicked()), this, SLOT(downloadFile()));+
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    connect(quitButton, SIGNAL(clicked()), this, SLOT(close()));+
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+
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    QHBoxLayout *topLayout = new QHBoxLayout;+
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    topLayout->addWidget(ftpServerLabel);+
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    topLayout->addWidget(ftpServerLineEdit);+
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#ifndef Q_OS_SYMBIAN+
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    topLayout->addWidget(cdToParentButton);+
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    topLayout->addWidget(connectButton);+
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#else+
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    // Make app better lookin on small screen+
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    QHBoxLayout *topLayout2 = new QHBoxLayout;+
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    topLayout2->addWidget(cdToParentButton);+
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    topLayout2->addWidget(connectButton);+
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#endif+
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+
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    QVBoxLayout *mainLayout = new QVBoxLayout;+
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    mainLayout->addLayout(topLayout);+
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#ifdef Q_OS_SYMBIAN+
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    // Make app better lookin on small screen+
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    mainLayout->addLayout(topLayout2);+
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#endif+
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    mainLayout->addWidget(fileList);+
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    mainLayout->addWidget(statusLabel);+
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    mainLayout->addWidget(buttonBox);+
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    setLayout(mainLayout);+
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+
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#ifdef Q_OS_SYMBIAN+
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    bDefaultIapSet = false;+
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#endif+
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+
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    setWindowTitle(tr("FTP"));+
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}+
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+
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QSize FtpWindow::sizeHint() const+
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{+
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    return QSize(500, 300);+
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}+
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+
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//![0]+
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void FtpWindow::connectOrDisconnect()+
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{+
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#ifdef Q_OS_SYMBIAN+
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   if(!bDefaultIapSet) {+
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       qt_SetDefaultIap();+
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       bDefaultIapSet = true;+
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   }+
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#endif+
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    if (ftp) {+
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        ftp->abort();+
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        ftp->deleteLater();+
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        ftp = 0;+
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//![0]+
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        fileList->setEnabled(false);+
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        cdToParentButton->setEnabled(false);+
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        downloadButton->setEnabled(false);+
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        connectButton->setEnabled(true);+
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        connectButton->setText(tr("Connect"));+
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#ifndef QT_NO_CURSOR+
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        setCursor(Qt::ArrowCursor);+
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#endif+
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        statusLabel->setText(tr("Please enter the name of an FTP server."));+
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        return;+
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    }+
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+
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#ifndef QT_NO_CURSOR+
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    setCursor(Qt::WaitCursor);+
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#endif+
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+
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//![1]+
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    ftp = new QFtp(this);+
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    connect(ftp, SIGNAL(commandFinished(int,bool)),+
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            this, SLOT(ftpCommandFinished(int,bool)));+
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    connect(ftp, SIGNAL(listInfo(QUrlInfo)),+
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            this, SLOT(addToList(QUrlInfo)));+
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    connect(ftp, SIGNAL(dataTransferProgress(qint64,qint64)),+
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            this, SLOT(updateDataTransferProgress(qint64,qint64)));+
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+
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    fileList->clear();+
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    currentPath.clear();+
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    isDirectory.clear();+
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//![1]+
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+
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//![2]+
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    QUrl url(ftpServerLineEdit->text());+
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    if (!url.isValid() || url.scheme().toLower() != QLatin1String("ftp")) {+
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        ftp->connectToHost(ftpServerLineEdit->text(), 21);+
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        ftp->login();+
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    } else {+
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        ftp->connectToHost(url.host(), url.port(21));+
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+
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        if (!url.userName().isEmpty())+
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            ftp->login(QUrl::fromPercentEncoding(url.userName().toLatin1()), url.password());+
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        else+
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            ftp->login();+
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        if (!url.path().isEmpty())+
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            ftp->cd(url.path());+
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    }+
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//![2]+
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+
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    fileList->setEnabled(true);+
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    connectButton->setEnabled(false);+
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    connectButton->setText(tr("Disconnect"));+
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    statusLabel->setText(tr("Connecting to FTP server %1...")+
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                         .arg(ftpServerLineEdit->text()));+
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}+
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+
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//![3]+
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void FtpWindow::downloadFile()+
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{+
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    QString fileName = fileList->currentItem()->text(0);+
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//![3]+
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//+
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    if (QFile::exists(fileName)) {+
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        QMessageBox::information(this, tr("FTP"),+
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                                 tr("There already exists a file called %1 in "+
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                                    "the current directory.")+
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                                 .arg(fileName));+
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        return;+
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    }+
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+
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//![4]+
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    file = new QFile(fileName);+
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    if (!file->open(QIODevice::WriteOnly)) {+
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        QMessageBox::information(this, tr("FTP"),+
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                                 tr("Unable to save the file %1: %2.")+
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                                 .arg(fileName).arg(file->errorString()));+
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        delete file;+
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        return;+
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    }+
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+
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    ftp->get(fileList->currentItem()->text(0), file);+
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+
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    progressDialog->setLabelText(tr("Downloading %1...").arg(fileName));+
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    downloadButton->setEnabled(false);+
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    progressDialog->exec();+
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}+
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//![4]+
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+
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//![5]+
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void FtpWindow::cancelDownload()+
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{+
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    ftp->abort();+
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}+
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//![5]+
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+
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//![6]+
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void FtpWindow::ftpCommandFinished(int, bool error)+
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{+
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#ifndef QT_NO_CURSOR+
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    setCursor(Qt::ArrowCursor);+
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#endif+
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+
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    if (ftp->currentCommand() == QFtp::ConnectToHost) {+
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        if (error) {+
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            QMessageBox::information(this, tr("FTP"),+
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                                     tr("Unable to connect to the FTP server "+
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                                        "at %1. Please check that the host "+
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                                        "name is correct.")+
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                                     .arg(ftpServerLineEdit->text()));+
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            connectOrDisconnect();+
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            return;+
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        }+
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        statusLabel->setText(tr("Logged onto %1.")+
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                             .arg(ftpServerLineEdit->text()));+
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        fileList->setFocus();+
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        downloadButton->setDefault(true);+
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        connectButton->setEnabled(true);+
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        return;+
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    }+
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//![6]+
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+
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//![7]+
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    if (ftp->currentCommand() == QFtp::Login)+
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        ftp->list();+
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//![7]+
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+
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//![8]+
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    if (ftp->currentCommand() == QFtp::Get) {+
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        if (error) {+
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            statusLabel->setText(tr("Canceled download of %1.")+
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                                 .arg(file->fileName()));+
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            file->close();+
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            file->remove();+
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        } else {+
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            statusLabel->setText(tr("Downloaded %1 to current directory.")+
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                                 .arg(file->fileName()));+
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            file->close();+
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        }+
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        delete file;+
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        enableDownloadButton();+
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        progressDialog->hide();+
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//![8]+
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//![9]+
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    } else if (ftp->currentCommand() == QFtp::List) {+
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        if (isDirectory.isEmpty()) {+
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            fileList->addTopLevelItem(new QTreeWidgetItem(QStringList() << tr("<empty>")));+
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            fileList->setEnabled(false);+
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        }+
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    }+
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//![9]+
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}+
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+
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//![10]+
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void FtpWindow::addToList(const QUrlInfo &urlInfo)+
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{+
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    QTreeWidgetItem *item = new QTreeWidgetItem;+
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    item->setText(0, urlInfo.name());+
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    item->setText(1, QString::number(urlInfo.size()));+
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    item->setText(2, urlInfo.owner());+
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    item->setText(3, urlInfo.group());+
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    item->setText(4, urlInfo.lastModified().toString("MMM dd yyyy"));+
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+
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    QPixmap pixmap(urlInfo.isDir() ? ":/images/dir.png" : ":/images/file.png");+
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    item->setIcon(0, pixmap);+
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+
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    isDirectory[urlInfo.name()] = urlInfo.isDir();+
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    fileList->addTopLevelItem(item);+
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    if (!fileList->currentItem()) {+
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        fileList->setCurrentItem(fileList->topLevelItem(0));+
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        fileList->setEnabled(true);+
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    }+
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}+
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//![10]+
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+
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//![11]+
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void FtpWindow::processItem(QTreeWidgetItem *item, int /*column*/)+
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{+
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    QString name = item->text(0);+
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    if (isDirectory.value(name)) {+
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        fileList->clear();+
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        isDirectory.clear();+
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        currentPath += "/" + name;+
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        ftp->cd(name);+
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        ftp->list();+
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        cdToParentButton->setEnabled(true);+
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#ifndef QT_NO_CURSOR+
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        setCursor(Qt::WaitCursor);+
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#endif+
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        return;+
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    }+
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}+
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//![11]+
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+
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//![12]+
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void FtpWindow::cdToParent()+
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{+
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#ifndef QT_NO_CURSOR+
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    setCursor(Qt::WaitCursor);+
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#endif+
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    fileList->clear();+
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    isDirectory.clear();+
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    currentPath = currentPath.left(currentPath.lastIndexOf('/'));+
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    if (currentPath.isEmpty()) {+
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        cdToParentButton->setEnabled(false);+
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        ftp->cd("/");+
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    } else {+
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        ftp->cd(currentPath);+
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    }+
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    ftp->list();+
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}+
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//![12]+
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+
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//![13]+
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void FtpWindow::updateDataTransferProgress(qint64 readBytes,+
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                                           qint64 totalBytes)+
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{+
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    progressDialog->setMaximum(totalBytes);+
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    progressDialog->setValue(readBytes);+
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}+
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//![13]+
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+
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//![14]+
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void FtpWindow::enableDownloadButton()+
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{+
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    QTreeWidgetItem *current = fileList->currentItem();+
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    if (current) {+
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        QString currentFile = current->text(0);+
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        downloadButton->setEnabled(!isDirectory.value(currentFile));+
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    } else {+
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        downloadButton->setEnabled(false);+
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    }+
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}+
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//![14]+
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+
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