Qtimer singleshot not working

IknowQT

wBIT w;
w.setGeometry(0, 0, defineSize.width(), defineSize.height());
w.show();
QTimer::singleShot(1500, &w, SLOT(w.StopTest(false)));

void wBIT::StopTest(bool bStop)
{
   this->ui.wBitItem_Device->ProcessCheck(bStop);
   this->ui.wBitItem_WMotor->ProcessCheck(bStop);
   this->ui.wBitItem_CMotor->ProcessCheck(bStop);
   this->ui.wBitItem_FMotor->ProcessCheck(bStop);
   this->ui.wBitItem_LMotor->ProcessCheck(bStop);
   this->ui.wBitItem_TLamp	->ProcessCheck(bStop);
   this->ui.wBitItem_DLamp	->ProcessCheck(bStop);
   this->ui.wBitItem_DPeak	->ProcessCheck(bStop);
}

I want to send a stop signal after 1,500 milliseconds, but it doesn't work.

Christian Ehrlicher

@IknowQT said in Qtimer singleshot not working:

SLOT(w.StopTest(false)));

This is wrong and you will also get a runtime warning on your console about this. If you want to pass a variable use the new signal/slot syntax with a lambda or call another slot which then calls the real function with your parameter.

jsulm

@IknowQT said in Qtimer singleshot not working:

wBIT w;

This again...
You are declaring a local variable, which gets out of scope and is deleted.
Either allocate it on the heap or make it class member...

Christian Ehrlicher

@IknowQT said in Qtimer singleshot not working:

SLOT(w.StopTest(false)));

This is wrong and you will also get a runtime warning on your console about this. If you want to pass a variable use the new signal/slot syntax with a lambda or call another slot which then calls the real function with your parameter.

J.Hilk

@IknowQT said in Qtimer singleshot not working:

SLOT(w.StopTest(false))

this

SLOT(w.StopTest(false))

is 100% wrong, you can't set arguments in SLOT macro