void RenderListBox::autoscroll()
{
IntPoint pos = document()->frame()->view()->windowToContents(document()->frame()->eventHandler()->currentMousePosition());
int rx = 0;
int ry = 0;
absolutePosition(rx, ry);
int offsetX = pos.x() - rx;
int offsetY = pos.y() - ry;
int endIndex = -1;
int rows = numVisibleItems();
int offset = m_indexOffset;
if (offsetY < borderTop() + paddingTop() && scrollToRevealElementAtListIndex(offset - 1))
endIndex = offset - 1;
else if (offsetY > height() - paddingBottom() - borderBottom() && scrollToRevealElementAtListIndex(offset + rows))
endIndex = offset + rows - 1;
else
endIndex = listIndexAtOffset(offsetX, offsetY);
if (endIndex >= 0) {
HTMLSelectElement* select = static_cast<HTMLSelectElement*>(node());
m_inAutoscroll = true;
if (!select->multiple())
select->setActiveSelectionAnchorIndex(endIndex);
select->setActiveSelectionEndIndex(endIndex);
select->updateListBoxSelection(!select->multiple());
m_inAutoscroll = false;
}
}
void RenderListBox::autoscroll()
{
IntPoint pos = frame()->view()->windowToContents(frame()->eventHandler()->currentMousePosition());
int endIndex = scrollToward(pos);
if (endIndex >= 0) {
HTMLSelectElement* select = toHTMLSelectElement(node());
m_inAutoscroll = true;
if (!select->multiple())
select->setActiveSelectionAnchorIndex(endIndex);
select->setActiveSelectionEndIndex(endIndex);
select->updateListBoxSelection(!select->multiple());
m_inAutoscroll = false;
}
}
void RenderListBox::panScroll(const IntPoint& panStartMousePosition)
{
const int maxSpeed = 20;
const int iconRadius = 7;
const int speedReducer = 4;
// FIXME: This doesn't work correctly with transforms.
FloatPoint absOffset = localToAbsolute();
IntPoint currentMousePosition = roundedIntPoint(frame()->eventHandler()->currentMousePosition());
// We need to check if the current mouse position is out of the window. When the mouse is out of the window, the position is incoherent
static IntPoint previousMousePosition;
if (currentMousePosition.y() < 0)
currentMousePosition = previousMousePosition;
else
previousMousePosition = currentMousePosition;
int yDelta = currentMousePosition.y() - panStartMousePosition.y();
// If the point is too far from the center we limit the speed
yDelta = max<int>(min<int>(yDelta, maxSpeed), -maxSpeed);
if (abs(yDelta) < iconRadius) // at the center we let the space for the icon
return;
if (yDelta > 0)
//offsetY = view()->viewHeight();
absOffset.move(0, listHeight());
else if (yDelta < 0)
yDelta--;
// Let's attenuate the speed
yDelta /= speedReducer;
IntPoint scrollPoint(0, 0);
scrollPoint.setY(absOffset.y() + yDelta);
int newOffset = scrollToward(scrollPoint);
if (newOffset < 0)
return;
m_inAutoscroll = true;
HTMLSelectElement* select = toHTMLSelectElement(node());
select->updateListBoxSelection(!select->multiple());
m_inAutoscroll = false;
}