protected override void OnLayout(bool changed, int l, int t, int r, int b)
{
int width = r - l;
int height = b - t;
if (width > 0 && height > 0)
{
var context = Context;
_rootLayout.Measure(MeasureSpecFactory.MakeMeasureSpec(width, MeasureSpecMode.AtMost), MeasureSpecFactory.MakeMeasureSpec(height, MeasureSpecMode.AtMost));
_rootLayout.Layout(0, 0, _rootLayout.MeasuredWidth, _rootLayout.MeasuredHeight);
_bottomBar.Measure(MeasureSpecFactory.MakeMeasureSpec(width, MeasureSpecMode.Exactly), MeasureSpecFactory.MakeMeasureSpec(height, MeasureSpecMode.AtMost));
int tabsHeight = BottomBarHeight.HasValue ? (int)Context.ToPixels(BottomBarHeight.Value) : Math.Min(height, Math.Max(_bottomBar.MeasuredHeight, _bottomBar.MinimumHeight));
_frameLayout.Layout(0, 0, width, height - tabsHeight);
_pageController.ContainerArea = new Rectangle(0, 0, context.FromPixels(width), context.FromPixels(_frameLayout.Height));
_bottomBar.Layout(0, height - tabsHeight, width, height);
}
base.OnLayout(changed, l, t, r, b);
}