QSlider mouse direct jump

Question

Instead of stepping when the user clicks somewhere on the qslider I want to make the slider jump to that position. How can this be implemented ?

Answer 1

The answer of Massimo Callegari is almost right, but the calculation of newVal ignores the slider handle width. This problem comes up when you try to click near the end of the slider.

The following code fixes this for horizontal sliders

double halfHandleWidth = (0.5 * sr.width()) + 0.5; // Correct rounding
int adaptedPosX = event->x();
if ( adaptedPosX < halfHandleWidth )
        adaptedPosX = halfHandleWidth;
if ( adaptedPosX > width() - halfHandleWidth )
        adaptedPosX = width() - halfHandleWidth;
// get new dimensions accounting for slider handle width
double newWidth = (width() - halfHandleWidth) - halfHandleWidth;
double normalizedPosition = (adaptedPosX - halfHandleWidth)  / newWidth ;

newVal = minimum() + ((maximum()-minimum()) * normalizedPosition);