protected override void OnLayout(bool changed, int left, int top, int right, int bottom)
{
base.OnLayout(changed, left, top, right, bottom);
if (!changed)
{
return;
}
var startPos = _layoutManager.FindFirstCompletelyVisibleItemPosition();
var endPos = _layoutManager.FindLastCompletelyVisibleItemPosition();
int totalH = 0;
for (var i = startPos; i <= endPos; i++)
{
var child = _layoutManager.GetChildAt(i);
if (child == null)
{
return;
}
totalH += _layoutManager.GetChildAt(i).Height;
}
Element.VisibleContentHeight = Context.FromPixels(Math.Min(totalH, Control.Height));
}
