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void ImageArea::saveConf(bool def)
{
    static bool fp = true;
    static QString filename = QString("default.conf");
    if(!def){
        filename = QFileDialog::getSaveFileName(this, tr("Save config"), "", tr("Config files (*.conf)"));
        if(fp){
            QFile file(filename);
            if(file.open(QFile::WriteOnly)){
                QTextStream str(&file);
                str << crop[0].x() << " " << crop[0].y() << "\n";
                str << crop[1].x() << " " << crop[1].y() << "\n";
                str << square[0].x() << " " << square[0].y() << "\n";
                str << square[1].x() << " " << square[1].y() << "\n";
                str << square[2].x() << " " << square[2].y() << "\n";
                QMessageBox::information(this, tr("Next step"), tr("Put 3 points then press Save again"));
            }else{
                QMessageBox::warning(this, tr("Error"), tr("Can not open a file"));
            }
            fp = false;
        }else{
            QFile file(filename);
            if(file.open(QFile::Append)){
                QTextStream str(&file);
                str << square[0].x() << " " << square[0].y() << "\n";
                str << square[1].x() << " " << square[1].y() << "\n";
                str << square[2].x() << " " << square[2].y() << "\n";
            }else{
                QMessageBox::warning(this, tr("Error"), tr("Can not open a file"));
            }
            fp = true;
        }
    }else{
        QFile file(filename);
        if(file.open(QFile::WriteOnly)){
            QTextStream str(&file);
            str << conf.crop[0].x() << " " << conf.crop[0].y() << "\n";
            str << conf.crop[1].x() << " " << conf.crop[1].y() << "\n";
            str << conf.square[0].x() << " " << conf.square[0].y() << "\n";
            str << conf.square[1].x() << " " << conf.square[1].y() << "\n";
            str << conf.square[2].x() << " " << conf.square[2].y() << "\n";
            str << conf.square0[0].x() << " " << conf.square0[0].y() << "\n";
            str << conf.square0[1].x() << " " << conf.square0[1].y() << "\n";
            str << conf.square0[2].x() << " " << conf.square0[2].y() << "\n";
        }
    }
}