void MainWindow::openAboutDialog()
{
AboutDialog *dialog = new AboutDialog(this);
dialog->show();
dialog->raise();
dialog->activateWindow();
}
bool AboutDialog::showDlg( QWidget * parent )
{
AboutDialog * dlg = new AboutDialog( parent );
//dlg->setModal( true );
dlg->setWindowTitle("About CoolReader");
dlg->show();
dlg->raise();
dlg->activateWindow();
return true;
}