error: no matching function for call to ‘QTimer:

[saman_artorious]

I need to set a timer in my serial class, so when the timer triggers, it calls
a slot. I get the following error when I build the program:

error: no matching function for call to ‘QTimer::singleShot(int, rsxxx* const, bool)’

Here's the code segment:

void rsxxx::DieselSwitchOff()
{
    if(!DieselSwitchOff_1())
    {
        qDebug() << "Diesel failed to switch off..";
    }
 
    QTimer::singleShot(3000, this, DieselSwitchOff_2());
}

void rsxxx::DieselSwitchOff()
{
    if(!DieselSwitchOff_1())
    {
        qDebug() << "Diesel failed to switch off..";
    }

    QTimer::singleShot(3000, this, DieselSwitchOff_2());
}

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how should DieselSwitchOff be declared? as a public slot or a class member suffices?
also note that the DieselSwitchOff_2 return bool.
I pass the this pointer, as I want to call the singleShot in my rs485 class.

[mvuori]

When you look at QTimer class reference, you may notice that the last parameter is int the function call is in the examples wrapped inside a SLOT() makro, so do that and make it a public slot. I guess there may be another problem of rsxxx not being based on QObject, which is needed for that argument.

[StrikeByte]

If the class is not an QObject it is not possible to send the class as an argument to singleShot

The slot may be a private slot thats not a problem but maybe try:
QTimer::singleShot(3000, this, SLOT(DieselSwitchOff_2()));

What version of Qt are you using
Qt3 doesn't have the singleShot function (it uses timer->start(int,bool) the bool is for singleshot)
Qt4 does have it