Class: FtpWindow

Inherits:
Qt::Dialog show all
Defined in:
ext/ruby/qtruby/examples/network/ftp/ftpwindow.rb

Instance Method Summary collapse

Methods inherited from Qt::Dialog

#exec

Methods inherited from Qt::Base

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Constructor Details

#initialize(parent = nil) ⇒ FtpWindow

Returns a new instance of FtpWindow.



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# File 'ext/ruby/qtruby/examples/network/ftp/ftpwindow.rb', line 37

def initialize(parent = nil)
    super(parent)
    @ftp = nil
    @isDirectory = {}
    @ftpServerLabel = Qt::Label.new(tr("Ftp &server:"))
    @ftpServerLineEdit = Qt::LineEdit.new("ftp.trolltech.com")
    @ftpServerLabel.buddy = @ftpServerLineEdit

    @statusLabel = Qt::Label.new(tr("Please enter the name of an FTP server."))

    @fileList = Qt::ListWidget.new
    @fileList.enabled = false

    @connectButton = Qt::PushButton.new(tr("Connect"))
    @connectButton.default = true
    
    @downloadButton = Qt::PushButton.new(tr("Download"))
    @downloadButton.enabled = false

    @cdToParentButton = Qt::PushButton.new
    @cdToParentButton.icon = Qt::Icon.new("images/cdtoparent.png")
    @cdToParentButton.enabled = false

    @quitButton = Qt::PushButton.new(tr("Quit"))

    @progressDialog = Qt::ProgressDialog.new(self)

    connect(@fileList, SIGNAL('itemDoubleClicked(QListWidgetItem *)'),
            self, SLOT('processItem(QListWidgetItem *)'))
    connect(@fileList, SIGNAL(:itemSelectionChanged),
            self, SLOT(:enableDownloadButton))
    connect(@progressDialog, SIGNAL(:canceled), self, SLOT(:cancelDownload))
    connect(@connectButton, SIGNAL(:clicked), self, SLOT(:connectOrDisconnect))
    connect(@cdToParentButton, SIGNAL(:clicked), self, SLOT(:cdToParent))
    connect(@downloadButton, SIGNAL(:clicked), self, SLOT(:downloadFile))
    connect(@quitButton, SIGNAL(:clicked), self, SLOT(:close))

    topLayout = Qt::HBoxLayout.new do |t|
        t.addWidget(@ftpServerLabel)
        t.addWidget(@ftpServerLineEdit)
        t.addWidget(@cdToParentButton)
        t.addWidget(@connectButton)
    end
    
    buttonLayout = Qt::HBoxLayout.new do |b|
        b.addStretch(1)
        b.addWidget(@downloadButton)
        b.addWidget(@quitButton)
    end

    self.layout = Qt::VBoxLayout.new do |m|
        m.addLayout(topLayout)
        m.addWidget(@fileList)
        m.addWidget(@statusLabel)
        m.addLayout(buttonLayout)
    end

    setWindowTitle(tr("FTP"))
end

Instance Method Details

#addToList(urlInfo) ⇒ Object 



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# File 'ext/ruby/qtruby/examples/network/ftp/ftpwindow.rb', line 198

def addToList(urlInfo)
    item = Qt::ListWidgetItem.new
    item.text = urlInfo.name()
    pixmap = Qt::Pixmap.new(urlInfo.dir? ? "images/dir.png" : "images/file.png")
    item.icon = pixmap

    @isDirectory[urlInfo.name()] = urlInfo.isDir()
    @fileList.addItem(item)
    if @fileList.currentItem.nil?
        @fileList.currentItem = @fileList.item(0)
        @fileList.enabled = true
    end
end

#cancelDownload ⇒ Object 



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# File 'ext/ruby/qtruby/examples/network/ftp/ftpwindow.rb', line 153

def cancelDownload()
    @ftp.abort()
end

#cdToParent ⇒ Object 



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# File 'ext/ruby/qtruby/examples/network/ftp/ftpwindow.rb', line 226

def cdToParent()
    Qt::Application.overrideCursor = Qt::WaitCursor
    @fileList.clear()
    @isDirectory.clear()
    @currentPath = @currentPath.slice(@currentPath.rindex('/'), @currentPath.length)
    if @currentPath.empty?
        @cdToParentButton.enabled = false
        @ftp.cd("/")
    else
        @ftp.cd(@currentPath)
    end
    @ftp.list()
end

#connectOrDisconnect ⇒ Object 



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# File 'ext/ruby/qtruby/examples/network/ftp/ftpwindow.rb', line 97

def connectOrDisconnect()
    if !@ftp.nil?
        @ftp.abort
        @ftp.deleteLater
        @fileList.enabled = false
        @downloadButton.enabled = false
        @connectButton.text = tr("Connect")
        return
    end
    
    Qt::Application.overrideCursor = Qt::Cursor.new(Qt::WaitCursor)
    
    @ftp = Qt::Ftp.new(self)
    connect(@ftp, SIGNAL('commandFinished(int, bool)'),
            self, SLOT('ftpCommandFinished(int, bool)'))
    connect(@ftp, SIGNAL('listInfo(const QUrlInfo &)'),
            self, SLOT('addToList(const QUrlInfo &)'))
    connect(@ftp, SIGNAL('dataTransferProgress(qint64, qint64)'),
            self, SLOT('updateDataTransferProgress(qint64, qint64)'))

    @ftp.connectToHost(@ftpServerLineEdit.text())
    @ftp.()
    @ftp.list()

    @fileList.enabled = true
    @connectButton.text = tr("Disconnect")
    @statusLabel.text = tr("Connecting to FTP server %s..." % @ftpServerLineEdit.text)
end

#downloadFile ⇒ Object 



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# File 'ext/ruby/qtruby/examples/network/ftp/ftpwindow.rb', line 126

def downloadFile()
    @fileName = @fileList.currentItem().text()

    if Qt::File.exists(@fileName)
        Qt::MessageBox.information(self, tr("FTP"),
                                 tr("There already exists a @file called %s in " \
                                    "the current directory." %
                                 @fileName) )
        return
    end

    @file = Qt::File.new(fileName)
    if !@file.open(Qt::IODevice::WriteOnly)
        Qt::MessageBox.information(self, tr("FTP"),
                                 tr("Unable to save the @file %s: %s." %
                                 [@fileName, file.errorString] ) )
        @file.dispose
        return
    end

    @ftp.get(@fileList.currentItem.text, file)

    @progressDialog.labelText = tr("Downloading %s..." % @fileName)
    @progressDialog.show()
    @downloadButton.enabled = false
end

#enableDownloadButton ⇒ Object 



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# File 'ext/ruby/qtruby/examples/network/ftp/ftpwindow.rb', line 245

def enableDownloadButton()
    current = @fileList.currentItem()
    if !current.nil?
        currentFile = current.text()
        @downloadButton.enabled = !@isDirectory[currentFile]
    else
        @downloadButton.enabled = false
    end
end

#ftpCommandFinished(count, error) ⇒ Object 



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# File 'ext/ruby/qtruby/examples/network/ftp/ftpwindow.rb', line 157

def ftpCommandFinished(count, error)
    if @ftp.currentCommand == Qt::Ftp::ConnectToHost
        if error
            Qt::Application.restoreOverrideCursor
            Qt::MessageBox.information(self, tr("FTP"),
                                     tr("Unable to connect to the FTP server " \
                                        "at %s. Please check that the host " \
                                        "name is correct." %
                                     @ftpServerLineEdit.text) )
            return
        end

        @statusLabel.text = tr("Logged onto %s." % @ftpServerLineEdit.text)
        @fileList.setFocus()
        @downloadButton.default = true
        return
    end

    if @ftp.currentCommand == Qt::Ftp::Get
        Qt::Application.restoreOverrideCursor
        if error
            @statusLabel.text = tr("Canceled download of %s." %
                                 @file.fileName)
            @file.close
            @file.remove
        else
            @statusLabel.text = tr("Downloaded %s to current directory." %
                                 @file.fileName)
            @file.close
        end
        @file.dispose
        enableDownloadButton()
    elsif @ftp.currentCommand == Qt::Ftp::List
        Qt::Application.restoreOverrideCursor
        if @isDirectory.empty?
            @fileList.addItem(tr("<empty>"))
            @fileList.enabled = false
        end
    end
end

#processItem(item) ⇒ Object 



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# File 'ext/ruby/qtruby/examples/network/ftp/ftpwindow.rb', line 212

def processItem(item)
    name = item.text
    if @isDirectory[name]
        @fileList.clear()
        @isDirectory.clear()
        @currentPath += "/" + name
        @ftp.cd(name)
        @ftp.list
        @cdToParentButton.enabled = true
        Qt::Application.overrideCursor = Qt::WaitCursor
        return
    end
end

#updateDataTransferProgress(readBytes, totalBytes) ⇒ Object 



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# File 'ext/ruby/qtruby/examples/network/ftp/ftpwindow.rb', line 240

def updateDataTransferProgress(readBytes, totalBytes)
    @progressDialog.maximum = totalBytes
    @progressDialog.value = readBytes
end