{
// Wheel rotation by one notch results in a delta() of 120 (see
// documentation of QWheelEvent)
- int const delta = ev->delta() / 120;
+ double const delta = ev->delta() / 120.0;
if (ev->modifiers() & Qt::ControlModifier) {
- docstring arg = convert<docstring>(5 * delta);
+ docstring arg = convert<docstring>(int(5 * delta));
lyx::dispatch(FuncRequest(LFUN_BUFFER_ZOOM_IN, arg));
return;
}
int scroll_value = lines > page_step
? page_step : lines * verticalScrollBar()->singleStep();
- // Take into account the rotation.
- scroll_value *= delta;
-
- // Take into account user preference.
- scroll_value = int(scroll_value * lyxrc.mouse_wheel_speed);
+ // Take into account the rotation and the user preferences.
+ scroll_value = int(scroll_value * delta * lyxrc.mouse_wheel_speed);
LYXERR(Debug::SCROLLING, "wheelScrollLines = " << lines
<< " delta = " << delta << " scroll_value = " << scroll_value
<< " page_step = " << page_step);