Using QSlider to change the value of a variable

Question

I\'m trying to use QSlider to change the value of a variable,

 #include 

class MainThread : public QWidget{
Q_OBJECT
public:
MainTh         


        

Answer 1

slider is already a pointer, e.g. remove the '&'

connect( slider, SIGNAL((slider->valueChanged())), this, SLOT(setValue(double)) );

Edit: This won't work, since the signal has no argument. Rename the setValue(double) to setValue() and get the value from the slider with slider->value().