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ftpwindow.h Example File
network/ftp/ftpwindow.h

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 #ifndef FTPWINDOW_H
 #define FTPWINDOW_H

 #include <QDialog>
 #include <QHash>

 class QDialogButtonBox;
 class QFile;
 class QFtp;
 class QLabel;
 class QLineEdit;
 class QTreeWidget;
 class QTreeWidgetItem;
 class QProgressDialog;
 class QPushButton;
 class QUrlInfo;

 class FtpWindow : public QDialog
 {
     Q_OBJECT

 public:
     FtpWindow(QWidget *parent = 0);
     QSize sizeHint() const;

 private slots:
     void connectOrDisconnect();
     void downloadFile();
     void cancelDownload();

     void ftpCommandFinished(int commandId, bool error);
     void addToList(const QUrlInfo &urlInfo);
     void processItem(QTreeWidgetItem *item, int column);
     void cdToParent();
     void updateDataTransferProgress(qint64 readBytes,
                                     qint64 totalBytes);
     void enableDownloadButton();

 private:
     QLabel *ftpServerLabel;
     QLineEdit *ftpServerLineEdit;
     QLabel *statusLabel;
     QTreeWidget *fileList;
     QPushButton *cdToParentButton;
     QPushButton *connectButton;
     QPushButton *downloadButton;
     QPushButton *quitButton;
     QDialogButtonBox *buttonBox;
     QProgressDialog *progressDialog;

     QHash<QString, bool> isDirectory;
     QString currentPath;
     QFtp *ftp;
     QFile *file;
 };

 #endif