[Qt-interest] Is there a better way to code this to prevent recursive calling?

[Knapp]

This code can be entered at ether point by changing a spinBox for each
value, HT or FP. I am still at the learning stages of both C++ and QT.
I was hoping that someone could suggest a more concise or readable bit
of code. The best way would be if label_HT could change the FP spin
box without causing it to call itself. It seems that setValue is just
like clicking the spinBox.

void MainWindow::label_HT_Cost_Set(int Num)
{
    dHT = Num - old_HT;
    old_HT = Num;
    ui->label_HT_Cost_2->setNum((Num-10)*10);
    adjust_FP(-99);
    adjust_Unspent_Points();
}

void MainWindow::adjust_FP(int Num)
{
    if (Num==-99) { // entered by HT
        count_FP += 1;
        ui->spinBox_FP_2->setValue(old_FP+dHT);
        old_FP += dHT;
    }
    else if (count_FP == 0 ) { // entered by changing spinBox
        count_FP += 1;
        dFP = Num - old_FP;
        cost_FP += dFP * 3;
        ui->label_FP_Cost_2->setNum(cost_FP);
        ui->spinBox_FP_2->setValue(old_FP+dFP);
        old_FP = Num;
        count_FP = 0;
        adjust_Unspent_Points();
    }
    else count_FP = 0; //entered by a looping repeat
}

-- 
Douglas E Knapp

Why do we live?