Use changed spinbox-value in another void-function

vcsala

I beleive you wanted to write the following (the assigment was wrong in your original):

@void Tab::setVal(int value) {
k = value;
}@

And the parameter type of setVal is missing in your connect call.

newe1

Thanks so far.

I changed:
@
void Tab::setVal(int value)
{
k = value;
}
@

and:
@
....
connect(intSpinBox, SIGNAL(valueChanged(int)), this, SLOT(setVal(int)));
}
@

but the "void Tab::calculate()" function still does not get the value of "k"...

goetz

Additionally, your connect statement is wrong. This is the correct version:

@
connect(intSpinBox, SIGNAL(valueChanged(int)), this, SLOT(setVal(int)));
@

Spot the int parameter in SLOT (setVal(int)).

vcsala

[quote author="newe1" date="1305371816"]but the "void Tab::calculate()" function still does not get the value of "k"... [/quote]

What does happen? Does it raise division by zero exception? Have you tried to debug it and check if the setVal function is called? And check what is the value of k in the calculate function?

goetz

Nothing bad happens. The connect just fails (connect returns false) and Qt prints a warning to the console indicating that there is no slot with that signature (setVal without parameters). Just try and watch :)

newe1

Hi again!

Thanks Volker, I changed it. We were posting at the same time :-)

VCsala: Well it happens nothing. The divison by zero exception is not made, because of my range 2 to 20.

This are the private Slots:
@
private slots:
void calculate();
void setVal(int);
@

I´m using "k" like this:
@
void Tab::calculate()
{
double result, result1, result2, a, ....;

if(radio1->isChecked())
{
   result = a/k;
}
if(k==2)
{
   if(radio2->isChecked())
    {
        result = a/k;               //1. 
        result1 = a/k*2;          //2.
        QString result1String = "";
        re1->setText(result1String.setNum(result));
        QString result2String = "";
        re2->setText(result2String.setNum(result1));
    }
    else
    {
       QString result1String = "";
       re1->setText(result1String.setNum(result));
       re2->setText(result1String.setNum(result));
    }
 if(k==3)
     if(radio2->isChecked())
    {
        result = a/k;         //1.
        result1 = a/k*2;    //2.
        result2 = a/k*3;    //3.

.....
@

When I debug, I don´t get any error... but it does not get "k"...

VCsala: How do I check if the setval function is called?

Thanks in advance!

vcsala

Just set a breakpoint in the function, run the app in debugger and see if it stops there or not.

What does happen if you declare the slot to public?

goetz

From where is your calculate function called?

newe1

Hi!

Thank you VCsala and Volker for your ideas. It took me quite some time to solve the problem but now everything runs fine.

Finally I rebuilt everything without the GroupBox and it got the value of "k". I´m not 100% sure, why it could not get it before (maybe because of other interferring problems) but now it works. :-)

But I didn´t declare the slots to public. Just private slots, with the code above and it gets the value of "k".

Thanks anyway!

vcsala

Your welcome. I am glad that you solved the problem finally!