protected virtual void Update()
{
if (!Application.isPlaying)
{
return;
}
if (markForRefresh)
{
RefreshContent();
markForRefresh = false;
}
// Calculate any smooth scrolling that needs to happen
if (listInfo != null && listInfo.scrollToIndex != -1)
{
float itemSize = 0;
listInfo.scrollTo = GetItemPosition(listInfo.scrollToIndex, out itemSize) + listInfo.scrollOffset;
switch (listInfo.scrollAnchor)
{
case ListAnchor.Middle:
listInfo.scrollTo -= (isVertical ? ViewportSize / 2f - itemSize / 2f : -ViewportSize / 2f + itemSize / 2f);
break;
case ListAnchor.End:
listInfo.scrollTo -= (isVertical ? ViewportSize - itemSize : -ViewportSize + itemSize);
break;
}
// Calculate the lerp using an ease out function
double timePassed = SystemTimeInMilliseconds - listInfo.scrollingStart;
float delta = (float)(timePassed / listInfo.scrollDelta);
float distanceLeft = Mathf.Abs(listInfo.scrollTo - ViewportPosition);
if (distanceLeft <= 0.5)
{
listInfo.ResetScroll();
}
else
{
ContentPosition = ContentPosition - Mathf.Lerp(0, distanceLeft, delta) * (listInfo.scrollTo < ViewportPosition ? -1 : 1);
UpdateListItems();
// Check if we have scrolled past the end of the content
if (SpaceBelow < 0 || SpaceAbove < 0)
{
// Update the content position so its at the end
ContentPosition = ContentPosition - (SpaceBelow < 0 ? SpaceBelow : -SpaceAbove);
// Stop scrolling
listInfo.ResetScroll();
// Do one last update
UpdateListItems();
}
}
}
}
