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) && thumbUnderMouse(this)) {
theme()->invalidatePart(this, m_pressedPart);
setHoveredPart(ThumbPart);
return;
}
// We can't scroll if we've hit the beginning or end.
ScrollDirection dir = pressedPartScrollDirection();
if (dir == ScrollUp || dir == ScrollLeft) {
if (m_currentPos == 0)
return;
} else {
if (m_currentPos == maximum())
return;
}
m_scrollTimer.startOneShot(delay);
}
void PlatformScrollbar::startTimerIfNeeded(double delay)
{
// Don't do anything for the thumb.
if (m_pressedPart == QStyle::SC_ScrollBarSlider)
return;
// Handle the track. We halt track scrolling once the thumb is level
// with us.
if (m_pressedPart == QStyle::SC_ScrollBarGroove && thumbUnderMouse()) {
invalidate();
m_hoveredPart = QStyle::SC_ScrollBarSlider;
return;
}
// We can't scroll if we've hit the beginning or end.
ScrollDirection dir = pressedPartScrollDirection();
if (dir == ScrollUp || dir == ScrollLeft) {
if (m_currentPos == 0)
return;
} else {
if (m_currentPos == m_totalSize - m_visibleSize)
return;
}
m_scrollTimer.startOneShot(delay);
}
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) && thumbUnderMouse(this)) {
theme()->invalidatePart(this, m_pressedPart);
setHoveredPart(ThumbPart);
return;
}
// Handle the arrows and track.
if (m_scrollableArea && m_scrollableArea->scroll(pressedPartScrollDirection(), pressedPartScrollGranularity()))
startTimerIfNeeded(delay);
}
void PlatformScrollbar::autoscrollPressedPart(double delay)
{
// Don't do anything for the thumb or if nothing was pressed.
if (m_pressedPart == QStyle::SC_ScrollBarSlider || m_pressedPart == QStyle::SC_None)
return;
// Handle the track.
if (m_pressedPart == QStyle::SC_ScrollBarGroove && thumbUnderMouse()) {
invalidate();
m_hoveredPart = QStyle::SC_ScrollBarSlider;
return;
}
// Handle the arrows and track.
if (scroll(pressedPartScrollDirection(), pressedPartScrollGranularity()))
startTimerIfNeeded(delay);
}
