How to load a map in QT GUI application using text file

[jerkymotion]

I again tried to display my text file in ...but now in textbrowser...this time my program ran succcessfully and I and i browsed to my text file and it did displayed the content of my textfile but..ERROR:nly single line is diplayed....please suggest me ...to improve my code

void MainWindow::on_pushButton_clicked()
{
    QString filename = QFileDialog::getOpenFileName(this, tr("wew"),"",tr("allfiles(*.txt)"));
    QFile file(filename);
    if(file.open(QIODevice::ReadOnly | QIODevice::Text));
    {
    QTextStream in(&file);
    QString line;
 
       while (!in.atEnd())
    {
            line = in.readLine();
 
        ui->textBrowser->setText(line);
        //ui->textEdit->setPlainText(line);
       }
 
      file.close();
  }
 
}

void MainWindow::on_pushButton_clicked()
{
    QString filename = QFileDialog::getOpenFileName(this, tr("wew"),"",tr("allfiles(*.txt)"));
    QFile file(filename);
    if(file.open(QIODevice::ReadOnly | QIODevice::Text));
    {
    QTextStream in(&file);
    QString line;

       while (!in.atEnd())
    {
            line = in.readLine();

        ui->textBrowser->setText(line);
        //ui->textEdit->setPlainText(line);
       }

      file.close();
  }

}

To copy to clipboard, switch view to plain text mode