TAB BEGIN void MainWindow tab4_read_polinom QRegExp rx 0-9 0-9 0-9 0-9

// ************ TAB 4 BEGIN *******************
void MainWindow::tab4_read_polinom()
{
    QRegExp rx("([-+]?)([0-9]*)\\*?([x])?\\^?([0-9])?\\*?([y])?\\^?([0-9])?\\*?([z])?\\^?([0-9])?");
    //QRegExp rx("([-+]?)((?:[0-9]*))\\*?([a-z]?)\\^?((?:[0-9]*))");
    QString str = ui.lineEdit->text();
    QString sym, coef, var, exp;
    int pos = 0;
    P.clear();
    while ( pos < str.length() -1 )
    {
        rx.indexIn(str,pos);
        pos += rx.matchedLength();
        sym = rx.cap(1);
        int coef = rx.cap(2).toInt(0,0);
        int x,y,z;
        z=0; y=0; x=0;
        if (rx.cap(3)=="x")
        {
            x = rx.cap(4).toInt(0,0);
        }
        if (rx.cap(5)=="y")
        {
            y = rx.cap(6).toInt(0,0);
        }
        if (rx.cap(7)=="z")
        {
            z = rx.cap(8).toInt(0,0);
        }
        if ((coef==0) && ( (x!=0) || (y!=0) || (z!=0) ) )
        {
            if (coef == 0)
            {
                coef=1;
            }
        }
        if (sym == "-")
        {
            P.put(-1*coef,x,y,z);
        }
        else
        {
            P.put(coef,x,y,z);
        }
    }
}

void MainWindow::tab4_simplify()
{
    tab4_read_polinom();
    P.simplify();
    QString s = P.get();
    ui.lineEdit->setText(s);
}

void MainWindow::tab4_clear()
{
    P.clear();
    ui.lineEdit->clear();
}

void MainWindow::tab4_save()
{
    tab4_read_polinom();
    QString fname = QFileDialog::getSaveFileName(this,"",QString::null,QString::null);
    if (fname.length()>0) P.save_to_file(fname.toUtf8().data());
}
void MainWindow::tab4_load()
{
    QString fname = QFileDialog::getOpenFileName(this,"",QString::null,QString::null);
    if (fname.length()>0)
    {
        P.read_from_file(fname.toUtf8().data());
        QString s = P.get();
        ui.lineEdit->setText(s);
    }
}

// ************ TAB 4 END   *******************