private void UpdateCache()
{
if (thisRectTransform != null)
{
thisRectTransform.GetWorldCorners(corners);
rect.Set(corners[1].x, corners[1].y, Mathf.Abs(corners[2].x - corners[1].x),
Mathf.Abs(corners[0].y - corners[1].y));
center.Set((corners[2].x + corners[1].x) / 2.0f, (corners[1].y + corners[0].y) / 2.0f, corners[0].z);
}
if (thisTransform.childCount != childCount)
{
contentChilds.Clear();
for (int i = 0; i < thisTransform.childCount; i++)
{
contentChilds.Add(new ScrollViewItem(thisTransform.GetChild(i)));
if (i == 0)
{
closestChild = contentChilds[i];
}
}
Reposition();
childCount = thisTransform.childCount;
}
}
protected virtual void SetContentAnchoredPosition(Vector2 deltaPosition, Vector2 moveDelta)
{
for (int i = 0; i < contentChilds.Count; i++)
{
if (Direction != CircularScrollViewDirection.Horizontal)
{
deltaPosition.x = 0;
}
if (Direction != CircularScrollViewDirection.Vertical)
{
deltaPosition.y = 0;
}
if (deltaPosition != contentChilds[i].RectTransform.anchoredPosition)
{
contentChilds[i].RectTransform.anchoredPosition += deltaPosition;
}
contentChilds[i].UpdateDistance(center, Direction);
ScrollViewItem aux = null;
if (closestChild == null)
{
aux = closestChild;
closestChild = contentChilds[i];
onChange(closestChild.GameObject, aux != null ? aux.GameObject : null);
}
else
{
if (Mathf.Abs(contentChilds[i].DistanceFromCenter) < Mathf.Abs(closestChild.DistanceFromCenter))
{
aux = closestChild;
closestChild = contentChilds[i];
onChange(closestChild.GameObject, aux != null ? aux.GameObject : null);
}
}
}
}
private void MoveAllInvisibleTo(bool toStart)
{
if (contentChilds.TrueForAll(item => item.IsVisible == false))
{
return;
}
if (contentChilds.Count > 0)
{
ScrollViewItem target = toStart ? contentChilds.Last() : contentChilds.FirstOrDefault();
ScrollViewItem destination = toStart ? contentChilds.FirstOrDefault() : contentChilds.Last();
while (!target.IsVisible)
{
if (toStart)
{
target.Transform.SetAsFirstSibling();
}
else
{
target.Transform.SetAsLastSibling();
}
if (Direction == CircularScrollViewDirection.Horizontal)
{
target.RectTransform.anchoredPosition = new Vector2(
toStart
? destination.RectTransform.anchoredPosition.x - destination.RectTransform.rect.width -
Spacing
: destination.RectTransform.anchoredPosition.x + destination.RectTransform.rect.width +
Spacing,
destination.RectTransform.anchoredPosition.y);
}
if (Direction == CircularScrollViewDirection.Vertical)
{
target.RectTransform.anchoredPosition = new Vector2(
destination.RectTransform.anchoredPosition.x,
toStart
? destination.RectTransform.anchoredPosition.y - destination.RectTransform.rect.height -
Spacing
: destination.RectTransform.anchoredPosition.y + destination.RectTransform.rect.height +
Spacing);
}
target.UpdateVisibility(rect);
target.UpdateDistance(center, Direction);
if (toStart)
{
contentChilds.MoveBackwards();
}
else
{
contentChilds.MoveForward();
}
target = toStart ? contentChilds.Last() : contentChilds.FirstOrDefault();
destination = toStart ? contentChilds.FirstOrDefault() : contentChilds.Last();
}
}
}