#ifndef DIALOG_H#define DIALOG_H#include <QDialog>#include <QTcpSocket>class QFile;class QDialogButtonBox;class QLabel;class QProgressBar;class QPushButton;class QTcpSocket;class Dialog : public QDialog{    Q_OBJECTpublic:    Dialog(QWidget *parent = 0);public slots:    void start();    void startTransfer();    void updateClientProgress(qint64 numBytes);    void displayError(QAbstractSocket::SocketError socketError);    void openFile();private:    QProgressBar *clientProgressBar;    QLabel *clientStatusLabel;    QPushButton *startButton;    QPushButton *quitButton;    QPushButton *openButton;    QDialogButtonBox *buttonBox;    QTcpSocket tcpClient;    qint64  TotalBytes;    qint64  bytesWritten;    qint64  bytesToWrite;    qint64  loadSize;    QString fileName;    QFile *localFile;    QByteArray outBlock;};#endif