source: trunk/examples/network/ftp/ftpwindow.cpp@ 314

Last change on this file since 314 was 2, checked in by Dmitry A. Kuminov, 17 years ago

Initially imported qt-all-opensource-src-4.5.1 from Trolltech.
File size: 10.7 KB
Line 
1/****************************************************************************
2**
3** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
4** Contact: Qt Software Information ([email protected])
5**
6** This file is part of the examples of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** Commercial Usage
10** Licensees holding valid Qt Commercial licenses may use this file in
11** accordance with the Qt Commercial License Agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and Nokia.
14**
15** GNU Lesser General Public License Usage
16** Alternatively, this file may be used under the terms of the GNU Lesser
17** General Public License version 2.1 as published by the Free Software
18** Foundation and appearing in the file LICENSE.LGPL included in the
19** packaging of this file. Please review the following information to
20** ensure the GNU Lesser General Public License version 2.1 requirements
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22**
23** In addition, as a special exception, Nokia gives you certain
24** additional rights. These rights are described in the Nokia Qt LGPL
25** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
26** package.
27**
28** GNU General Public License Usage
29** Alternatively, this file may be used under the terms of the GNU
30** General Public License version 3.0 as published by the Free Software
31** Foundation and appearing in the file LICENSE.GPL included in the
32** packaging of this file. Please review the following information to
33** ensure the GNU General Public License version 3.0 requirements will be
34** met: http://www.gnu.org/copyleft/gpl.html.
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36** If you are unsure which license is appropriate for your use, please
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40****************************************************************************/
41
42#include <QtGui>
43#include <QtNetwork>
44
45#include "ftpwindow.h"
46
47FtpWindow::FtpWindow(QWidget *parent)
48 : QDialog(parent), ftp(0)
49{
50 ftpServerLabel = new QLabel(tr("Ftp &server:"));
51 ftpServerLineEdit = new QLineEdit("ftp.trolltech.com");
52 ftpServerLabel->setBuddy(ftpServerLineEdit);
53
54 statusLabel = new QLabel(tr("Please enter the name of an FTP server."));
55
56 fileList = new QTreeWidget;
57 fileList->setEnabled(false);
58 fileList->setRootIsDecorated(false);
59 fileList->setHeaderLabels(QStringList() << tr("Name") << tr("Size") << tr("Owner") << tr("Group") << tr("Time"));
60 fileList->header()->setStretchLastSection(false);
61
62 connectButton = new QPushButton(tr("Connect"));
63 connectButton->setDefault(true);
64
65 cdToParentButton = new QPushButton;
66 cdToParentButton->setIcon(QPixmap(":/images/cdtoparent.png"));
67 cdToParentButton->setEnabled(false);
68
69 downloadButton = new QPushButton(tr("Download"));
70 downloadButton->setEnabled(false);
71
72 quitButton = new QPushButton(tr("Quit"));
73
74 buttonBox = new QDialogButtonBox;
75 buttonBox->addButton(downloadButton, QDialogButtonBox::ActionRole);
76 buttonBox->addButton(quitButton, QDialogButtonBox::RejectRole);
77
78 progressDialog = new QProgressDialog(this);
79
80 connect(fileList, SIGNAL(itemActivated(QTreeWidgetItem *, int)),
81 this, SLOT(processItem(QTreeWidgetItem *, int)));
82 connect(fileList, SIGNAL(currentItemChanged(QTreeWidgetItem *, QTreeWidgetItem *)),
83 this, SLOT(enableDownloadButton()));
84 connect(progressDialog, SIGNAL(canceled()), this, SLOT(cancelDownload()));
85 connect(connectButton, SIGNAL(clicked()), this, SLOT(connectOrDisconnect()));
86 connect(cdToParentButton, SIGNAL(clicked()), this, SLOT(cdToParent()));
87 connect(downloadButton, SIGNAL(clicked()), this, SLOT(downloadFile()));
88 connect(quitButton, SIGNAL(clicked()), this, SLOT(close()));
89
90 QHBoxLayout *topLayout = new QHBoxLayout;
91 topLayout->addWidget(ftpServerLabel);
92 topLayout->addWidget(ftpServerLineEdit);
93 topLayout->addWidget(cdToParentButton);
94 topLayout->addWidget(connectButton);
95
96 QVBoxLayout *mainLayout = new QVBoxLayout;
97 mainLayout->addLayout(topLayout);
98 mainLayout->addWidget(fileList);
99 mainLayout->addWidget(statusLabel);
100 mainLayout->addWidget(buttonBox);
101 setLayout(mainLayout);
102
103 setWindowTitle(tr("FTP"));
104}
105
106QSize FtpWindow::sizeHint() const
107{
108 return QSize(500, 300);
109}
110
111//![0]
112void FtpWindow::connectOrDisconnect()
113{
114 if (ftp) {
115 ftp->abort();
116 ftp->deleteLater();
117 ftp = 0;
118//![0]
119 fileList->setEnabled(false);
120 cdToParentButton->setEnabled(false);
121 downloadButton->setEnabled(false);
122 connectButton->setEnabled(true);
123 connectButton->setText(tr("Connect"));
124#ifndef QT_NO_CURSOR
125 setCursor(Qt::ArrowCursor);
126#endif
127 return;
128 }
129
130#ifndef QT_NO_CURSOR
131 setCursor(Qt::WaitCursor);
132#endif
133
134//![1]
135 ftp = new QFtp(this);
136 connect(ftp, SIGNAL(commandFinished(int, bool)),
137 this, SLOT(ftpCommandFinished(int, bool)));
138 connect(ftp, SIGNAL(listInfo(const QUrlInfo &)),
139 this, SLOT(addToList(const QUrlInfo &)));
140 connect(ftp, SIGNAL(dataTransferProgress(qint64, qint64)),
141 this, SLOT(updateDataTransferProgress(qint64, qint64)));
142
143 fileList->clear();
144 currentPath.clear();
145 isDirectory.clear();
146//![1]
147
148//![2]
149 QUrl url(ftpServerLineEdit->text());
150 if (!url.isValid() || url.scheme().toLower() != QLatin1String("ftp")) {
151 ftp->connectToHost(ftpServerLineEdit->text(), 21);
152 ftp->login();
153 } else {
154 ftp->connectToHost(url.host(), url.port(21));
155
156 if (!url.userName().isEmpty())
157 ftp->login(QUrl::fromPercentEncoding(url.userName().toLatin1()), url.password());
158 else
159 ftp->login();
160 if (!url.path().isEmpty())
161 ftp->cd(url.path());
162 }
163//![2]
164
165 fileList->setEnabled(true);
166 connectButton->setEnabled(false);
167 connectButton->setText(tr("Disconnect"));
168 statusLabel->setText(tr("Connecting to FTP server %1...")
169 .arg(ftpServerLineEdit->text()));
170}
171
172//![3]
173void FtpWindow::downloadFile()
174{
175 QString fileName = fileList->currentItem()->text(0);
176//![3]
177//
178 if (QFile::exists(fileName)) {
179 QMessageBox::information(this, tr("FTP"),
180 tr("There already exists a file called %1 in "
181 "the current directory.")
182 .arg(fileName));
183 return;
184 }
185
186//![4]
187 file = new QFile(fileName);
188 if (!file->open(QIODevice::WriteOnly)) {
189 QMessageBox::information(this, tr("FTP"),
190 tr("Unable to save the file %1: %2.")
191 .arg(fileName).arg(file->errorString()));
192 delete file;
193 return;
194 }
195
196 ftp->get(fileList->currentItem()->text(0), file);
197
198 progressDialog->setLabelText(tr("Downloading %1...").arg(fileName));
199 downloadButton->setEnabled(false);
200 progressDialog->exec();
201}
202//![4]
203
204//![5]
205void FtpWindow::cancelDownload()
206{
207 ftp->abort();
208}
209//![5]
210
211//![6]
212void FtpWindow::ftpCommandFinished(int, bool error)
213{
214#ifndef QT_NO_CURSOR
215 setCursor(Qt::ArrowCursor);
216#endif
217
218 if (ftp->currentCommand() == QFtp::ConnectToHost) {
219 if (error) {
220 QMessageBox::information(this, tr("FTP"),
221 tr("Unable to connect to the FTP server "
222 "at %1. Please check that the host "
223 "name is correct.")
224 .arg(ftpServerLineEdit->text()));
225 connectOrDisconnect();
226 return;
227 }
228 statusLabel->setText(tr("Logged onto %1.")
229 .arg(ftpServerLineEdit->text()));
230 fileList->setFocus();
231 downloadButton->setDefault(true);
232 connectButton->setEnabled(true);
233 return;
234 }
235//![6]
236
237//![7]
238 if (ftp->currentCommand() == QFtp::Login)
239 ftp->list();
240//![7]
241
242//![8]
243 if (ftp->currentCommand() == QFtp::Get) {
244 if (error) {
245 statusLabel->setText(tr("Canceled download of %1.")
246 .arg(file->fileName()));
247 file->close();
248 file->remove();
249 } else {
250 statusLabel->setText(tr("Downloaded %1 to current directory.")
251 .arg(file->fileName()));
252 file->close();
253 }
254 delete file;
255 enableDownloadButton();
256 progressDialog->hide();
257//![8]
258//![9]
259 } else if (ftp->currentCommand() == QFtp::List) {
260 if (isDirectory.isEmpty()) {
261 fileList->addTopLevelItem(new QTreeWidgetItem(QStringList() << tr("<empty>")));
262 fileList->setEnabled(false);
263 }
264 }
265//![9]
266}
267
268//![10]
269void FtpWindow::addToList(const QUrlInfo &urlInfo)
270{
271 QTreeWidgetItem *item = new QTreeWidgetItem;
272 item->setText(0, urlInfo.name());
273 item->setText(1, QString::number(urlInfo.size()));
274 item->setText(2, urlInfo.owner());
275 item->setText(3, urlInfo.group());
276 item->setText(4, urlInfo.lastModified().toString("MMM dd yyyy"));
277
278 QPixmap pixmap(urlInfo.isDir() ? ":/images/dir.png" : ":/images/file.png");
279 item->setIcon(0, pixmap);
280
281 isDirectory[urlInfo.name()] = urlInfo.isDir();
282 fileList->addTopLevelItem(item);
283 if (!fileList->currentItem()) {
284 fileList->setCurrentItem(fileList->topLevelItem(0));
285 fileList->setEnabled(true);
286 }
287}
288//![10]
289
290//![11]
291void FtpWindow::processItem(QTreeWidgetItem *item, int /*column*/)
292{
293 QString name = item->text(0);
294 if (isDirectory.value(name)) {
295 fileList->clear();
296 isDirectory.clear();
297 currentPath += "/" + name;
298 ftp->cd(name);
299 ftp->list();
300 cdToParentButton->setEnabled(true);
301#ifndef QT_NO_CURSOR
302 setCursor(Qt::WaitCursor);
303#endif
304 return;
305 }
306}
307//![11]
308
309//![12]
310void FtpWindow::cdToParent()
311{
312#ifndef QT_NO_CURSOR
313 setCursor(Qt::WaitCursor);
314#endif
315 fileList->clear();
316 isDirectory.clear();
317 currentPath = currentPath.left(currentPath.lastIndexOf('/'));
318 if (currentPath.isEmpty()) {
319 cdToParentButton->setEnabled(false);
320 ftp->cd("/");
321 } else {
322 ftp->cd(currentPath);
323 }
324 ftp->list();
325}
326//![12]
327
328//![13]
329void FtpWindow::updateDataTransferProgress(qint64 readBytes,
330 qint64 totalBytes)
331{
332 progressDialog->setMaximum(totalBytes);
333 progressDialog->setValue(readBytes);
334}
335//![13]
336
337//![14]
338void FtpWindow::enableDownloadButton()
339{
340 QTreeWidgetItem *current = fileList->currentItem();
341 if (current) {
342 QString currentFile = current->text(0);
343 downloadButton->setEnabled(!isDirectory.value(currentFile));
344 } else {
345 downloadButton->setEnabled(false);
346 }
347}
348//![14]
349
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