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#!/usr/bin/env python
"""PyQt4 port of the network/ftp example from Qt v4.x"""
import sys
from PyQt4 import QtCore, QtGui, QtNetwork
import ftp_rc
class FtpWindow(QtGui.QDialog):
def __init__(self, parent=None):
QtGui.QDialog.__init__(self, parent)
self.ftpServerLabel = QtGui.QLabel(self.tr("Ftp &server:"))
self.ftpServerLineEdit = QtGui.QLineEdit("ftp.trolltech.com")
self.ftpServerLabel.setBuddy(self.ftpServerLineEdit)
self.statusLabel = QtGui.QLabel(self.tr("Please enter the name of an FTP server."))
self.fileList = QtGui.QListWidget()
self.connectButton = QtGui.QPushButton(self.tr("Connect"))
self.connectButton.setDefault(True)
self.downloadButton = QtGui.QPushButton(self.tr("Download"))
self.downloadButton.setEnabled(False)
self.cdToParentButton = QtGui.QPushButton()
self.cdToParentButton.setIcon(QtGui.QIcon(":/images/cdtoparent.png"))
self.cdToParentButton.setEnabled(False)
self.quitButton = QtGui.QPushButton(self.tr("Quit"))
self.isDirectory = {}
self.currentPath = QtCore.QString()
self.ftp = QtNetwork.QFtp(self)
self.outFile = None
self.progressDialog = QtGui.QProgressDialog(self)
self.connect(self.ftpServerLineEdit, QtCore.SIGNAL("textChanged(QString &)"),
self.enableConnectButton)
self.connect(self.fileList, QtCore.SIGNAL("itemDoubleClicked(QListWidgetItem *)"),
self.processItem)
self.connect(self.fileList, QtCore.SIGNAL("itemEntered(QListWidgetItem *)"),
self.processItem)
self.connect(self.fileList, QtCore.SIGNAL("itemSelectionChanged()"), self.enableDownloadButton)
self.connect(self.ftp, QtCore.SIGNAL("commandFinished(int, bool)"), self.ftpCommandFinished)
self.connect(self.ftp, QtCore.SIGNAL("listInfo(const QUrlInfo &)"), self.addToList)
self.connect(self.ftp, QtCore.SIGNAL("dataTransferProgress(qint64, qint64)"),
self.updateDataTransferProgress)
self.connect(self.progressDialog, QtCore.SIGNAL("canceled()"), self.cancelDownload)
self.connect(self.connectButton, QtCore.SIGNAL("clicked()"), self.connectToFtpServer)
self.connect(self.cdToParentButton, QtCore.SIGNAL("clicked()"), self.cdToParent)
self.connect(self.downloadButton, QtCore.SIGNAL("clicked()"), self.downloadFile)
self.connect(self.quitButton, QtCore.SIGNAL("clicked()"), self, QtCore.SLOT("close()"))
topLayout = QtGui.QHBoxLayout()
topLayout.addWidget(self.ftpServerLabel)
topLayout.addWidget(self.ftpServerLineEdit)
topLayout.addWidget(self.cdToParentButton)
buttonLayout = QtGui.QHBoxLayout()
buttonLayout.addStretch(1)
buttonLayout.addWidget(self.downloadButton)
buttonLayout.addWidget(self.connectButton)
buttonLayout.addWidget(self.quitButton)
mainLayout = QtGui.QVBoxLayout()
mainLayout.addLayout(topLayout)
mainLayout.addWidget(self.fileList)
mainLayout.addWidget(self.statusLabel)
mainLayout.addLayout(buttonLayout)
self.setLayout(mainLayout)
self.setWindowTitle(self.tr("FTP"))
def connectToFtpServer(self):
QtGui.QApplication.setOverrideCursor(QtCore.Qt.WaitCursor)
self.ftp.connectToHost(self.ftpServerLineEdit.text())
self.ftp.login()
self.ftp.list()
self.statusLabel.setText(self.tr("Connecting to FTP server %1...")
.arg(self.ftpServerLineEdit.text()))
def downloadFile(self):
fileName = QtCore.QString(self.fileList.currentItem().text())
if QtCore.QFile.exists(fileName):
QtGui.QMessageBox.information(self, self.tr("FTP"), self.tr(
"There already exists a file called %1 "
"in the current directory.").arg(fileName))
return
self.outFile = QtCore.QFile(fileName)
if not self.outFile.open(QtCore.QIODevice.WriteOnly):
QtGui.QMessageBox.information(self, self.tr("FTP"),
self.tr("Unable to save the file %1: %2.")
.arg(fileName).arg(self.outFile.errorString()))
self.outFile = None
return
self.ftp.get(self.fileList.currentItem().text(), self.outFile)
self.progressDialog.setLabelText(self.tr("Downloading %1...").arg(fileName))
self.progressDialog.show()
self.downloadButton.setEnabled(False)
def cancelDownload(self):
self.ftp.abort()
def ftpCommandFinished(self, int, error):
if self.ftp.currentCommand() == QtNetwork.QFtp.ConnectToHost:
if error:
QtGui.QApplication.restoreOverrideCursor()
QtGui.QMessageBox.information(self, self.tr("FTP"), self.tr(
"Unable to connect to the FTP server "
"at %1. Please check that the host "
"name is correct.")
.arg(self.ftpServerLineEdit.text()))
return
self.statusLabel.setText(self.tr("Logged onto %1.")
.arg(self.ftpServerLineEdit.text()))
self.fileList.setFocus()
self.connectButton.setEnabled(False)
self.downloadButton.setDefault(True)
return
if self.ftp.currentCommand() == QtNetwork.QFtp.Get:
QtGui.QApplication.restoreOverrideCursor()
if error:
self.statusLabel.setText(self.tr("Canceled download of %1.")
.arg(self.outFile.fileName()))
self.outFile.close()
self.outFile.remove()
else:
self.statusLabel.setText(self.tr("Downloaded %1 to current directory.")
.arg(self.outFile.fileName()))
self.outFile.close()
self.outFile = None
self.enableDownloadButton()
elif self.ftp.currentCommand() == QtNetwork.QFtp.List:
QtGui.QApplication.restoreOverrideCursor()
if not self.isDirectory:
self.fileList.addItem(self.tr("<empty>"))
self.fileList.setEnabled(False)
def addToList(self, urlInfo):
item = QtGui.QListWidgetItem()
item.setText(urlInfo.name())
if urlInfo.isDir():
icon = QtGui.QIcon(":/images/dir.png")
else:
icon = QtGui.QIcon(":/images/file.png")
item.setIcon(icon)
self.isDirectory[unicode(urlInfo.name())] = urlInfo.isDir()
self.fileList.addItem(item)
if not self.fileList.currentItem():
self.fileList.setCurrentItem(self.fileList.item(0))
self.fileList.setEnabled(True)
def processItem(self, item):
name = unicode(item.text())
if self.isDirectory.get(name):
self.fileList.clear()
self.isDirectory.clear()
self.currentPath += "/" + name
self.ftp.cd(name)
self.ftp.list()
self.cdToParentButton.setEnabled(True)
QtGui.QApplication.setOverrideCursor(QtCore.Qt.WaitCursor)
return
def cdToParent(self):
QtGui.QApplication.setOverrideCursor(QtCore.Qt.WaitCursor)
self.fileList.clear()
self.isDirectory.clear()
self.currentPath = self.currentPath.left(self.currentPath.lastIndexOf('/'))
if self.currentPath.isEmpty():
self.cdToParentButton.setEnabled(False)
self.ftp.cd("/")
else:
self.ftp.cd(self.currentPath)
self.ftp.list()
def updateDataTransferProgress(self, readBytes, totalBytes):
self.progressDialog.setMaximum(totalBytes)
self.progressDialog.setValue(readBytes)
def enableConnectButton(self):
self.connectButton.setEnabled(not self.ftpServerLineEdit.text().isEmpty())
def enableDownloadButton(self):
current = self.fileList.currentItem()
if current:
currentFile = QtCore.QString(current.text())
self.downloadButton.setEnabled(not self.isDirectory.get(currentFile))
else:
self.downloadButton.setEnabled(False)
if __name__ == '__main__':
app = QtGui.QApplication(sys.argv)
ftpWin = FtpWindow()
sys.exit(ftpWin.exec_())
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