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::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 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);
}
bool Scrollbar::gestureEvent(const PlatformGestureEvent& evt)
{
switch (evt.type()) {
case PlatformEvent::GestureTapDown:
// FIXME(sky): Is setting the pressed part needed since we only have overlay scrollbars?
setPressedPart(NoPart);
m_pressedPos = orientation() == HorizontalScrollbar ? convertFromContainingView(evt.position()).x() : convertFromContainingView(evt.position()).y();
return true;
case PlatformEvent::GestureTapDownCancel:
case PlatformEvent::GestureScrollBegin:
if (m_pressedPart != ThumbPart)
return false;
m_scrollPos = m_pressedPos;
return true;
case PlatformEvent::GestureScrollUpdate:
case PlatformEvent::GestureScrollUpdateWithoutPropagation:
if (m_pressedPart != ThumbPart)
return false;
m_scrollPos += orientation() == HorizontalScrollbar ? evt.deltaX() : evt.deltaY();
moveThumb(m_scrollPos);
return true;
case PlatformEvent::GestureScrollEnd:
case PlatformEvent::GestureLongPress:
case PlatformEvent::GestureFlingStart:
m_scrollPos = 0;
m_pressedPos = 0;
setPressedPart(NoPart);
return false;
case PlatformEvent::GestureTap: {
if (m_pressedPart != ThumbPart && m_pressedPart != NoPart && m_scrollableArea
&& m_scrollableArea->scroll(pressedPartScrollDirection(), pressedPartScrollGranularity())) {
return true;
}
m_scrollPos = 0;
m_pressedPos = 0;
setPressedPart(NoPart);
return false;
}
default:
// By default, we assume that gestures don't deselect the scrollbar.
return true;
}
}
bool Scrollbar::gestureEvent(const PlatformGestureEvent& evt)
{
switch (evt.type()) {
case PlatformEvent::GestureTapDown:
setPressedPart(theme()->hitTest(this, evt.position()));
m_pressedPos = orientation() == HorizontalScrollbar ? convertFromContainingWindow(evt.position()).x() : convertFromContainingWindow(evt.position()).y();
return true;
case PlatformEvent::GestureTapDownCancel:
case PlatformEvent::GestureScrollBegin:
if (m_pressedPart != ThumbPart)
return false;
m_scrollPos = m_pressedPos;
return true;
case PlatformEvent::GestureScrollUpdate:
if (m_pressedPart != ThumbPart)
return false;
m_scrollPos += orientation() == HorizontalScrollbar ? evt.deltaX() : evt.deltaY();
moveThumb(m_scrollPos, false);
return true;
case PlatformEvent::GestureScrollEnd:
case PlatformEvent::GestureLongPress:
case PlatformEvent::GestureFlingStart:
m_scrollPos = 0;
m_pressedPos = 0;
setPressedPart(NoPart);
return false;
case PlatformEvent::GestureTap: {
if (m_pressedPart != ThumbPart && m_pressedPart != NoPart && m_scrollableArea
&& m_scrollableArea->scroll(pressedPartScrollDirection(), pressedPartScrollGranularity())) {
return true;
}
m_scrollPos = 0;
m_pressedPos = 0;
setPressedPart(NoPart);
return false;
}
default:
// By default, we assume that gestures don't deselect the scrollbar.
return true;
}
}
bool Scrollbar::gestureEvent(const PlatformGestureEvent& evt)
{
bool handled = false;
switch (evt.type()) {
case PlatformEvent::GestureTapDown:
setPressedPart(theme()->hitTest(this, evt.position()));
m_pressedPos = (orientation() == HorizontalScrollbar ? convertFromContainingWindow(evt.position()).x() : convertFromContainingWindow(evt.position()).y());
return true;
case PlatformEvent::GestureTapDownCancel:
case PlatformEvent::GestureScrollBegin:
if (m_pressedPart == ThumbPart) {
m_scrollPos = m_pressedPos;
return true;
}
break;
case PlatformEvent::GestureScrollUpdate:
case PlatformEvent::GestureScrollUpdateWithoutPropagation:
if (m_pressedPart == ThumbPart) {
m_scrollPos += HorizontalScrollbar ? evt.deltaX() : evt.deltaY();
moveThumb(m_scrollPos, false);
return true;
}
break;
case PlatformEvent::GestureScrollEnd:
m_scrollPos = 0;
break;
case PlatformEvent::GestureTap:
if (m_pressedPart != ThumbPart && m_pressedPart != NoPart)
handled = m_scrollableArea && m_scrollableArea->scroll(pressedPartScrollDirection(), pressedPartScrollGranularity());
break;
default:
break;
}
setPressedPart(NoPart);
m_pressedPos = 0;
return handled;
}
