void Scrollbar::startTimerIfNeeded(double delay) {
// Don't do anything for the thumb.
if (m_pressedPart == ThumbPart)
return;
// Handle the track. We halt track scrolling once the thumb is level
// with us.
if ((m_pressedPart == BackTrackPart || m_pressedPart == ForwardTrackPart) &&
thumbWillBeUnderMouse()) {
setHoveredPart(ThumbPart);
return;
}
// We can't scroll if we've hit the beginning or end.
ScrollDirectionPhysical dir = pressedPartScrollDirectionPhysical();
if (dir == ScrollUp || dir == ScrollLeft) {
if (m_currentPos == 0)
return;
} else {
if (m_currentPos == maximum())
return;
}
m_scrollTimer.startOneShot(delay, BLINK_FROM_HERE);
}
void Scrollbar::autoscrollPressedPart(double delay)
{
// Don't do anything for the thumb or if nothing was pressed.
if (m_pressedPart == ThumbPart || m_pressedPart == NoPart)
return;
// Handle the track.
if ((m_pressedPart == BackTrackPart || m_pressedPart == ForwardTrackPart) && thumbWillBeUnderMouse()) {
setHoveredPart(ThumbPart);
return;
}
// Handle the arrows and track.
if (m_scrollableArea && m_scrollableArea->userScroll(pressedPartScrollGranularity(), toScrollDelta(pressedPartScrollDirectionPhysical(), 1)).didScroll())
startTimerIfNeeded(delay);
}
