void RemoveTabBarHeightListener(BottomNavigationView bottomNavView)
{
if (null != tabBarLayoutChangeListener)
{
bottomNavView?.RemoveOnLayoutChangeListener(tabBarLayoutChangeListener);
tabBarLayoutChangeListener.HeightChanged -= HandleTabBarHeightChanged;
tabBarLayoutChangeListener.Dispose();
tabBarLayoutChangeListener = null;
}
}
int CaculateTabHeight(BottomNavigationView bottomNavView)
{
var xfView = renderer.Element;
var tabHeight = TabEffect.GetCustomTabHeight(Element);
int viewHeight = 0;
var formViewHeight = xfView.HeightRequest;
if (null == tabHeight)
{
viewHeight = (int)Container.Context.ToPixels(xfView.HeightRequest);
}
else if (tabHeight.Mode == TabHeightMode.Absolute)
{
viewHeight = (int)Container.Context.ToPixels(tabHeight.Value);
formViewHeight = tabHeight.Value;
}
else if (bottomNavView != null)
{
if (tabHeight.Mode == TabHeightMode.RelativeToNativeTabBar)
{
viewHeight = (int)Math.Round((double)bottomNavView.Height + Container.Context.ToPixels(tabHeight.Value));
formViewHeight = Container.Context.FromPixels(bottomNavView.Height) + tabHeight.Value;
}
else
{
viewHeight = (int)Math.Round((double)bottomNavView.Height * tabHeight.Value);
formViewHeight = Container.Context.FromPixels((double)bottomNavView.Height * tabHeight.Value);
}
tabBarLayoutChangeListener = new TabBarLayoutChangeListener();
tabBarLayoutChangeListener.HeightChanged += HandleTabBarHeightChanged;
bottomNavView.AddOnLayoutChangeListener(tabBarLayoutChangeListener);
}
if (bottomNavView != null)
{
renderer.Layout(0, 0, bottomNavView.Width, viewHeight);
xfView.Layout(new Rectangle(0, 0, Container.Context.FromPixels(bottomNavView.Width), formViewHeight));
}
return(viewHeight);
}