protected override void OnLayout(bool changed, int l, int t, int r, int b)
{
base.OnLayout(changed, l, t, r, b);
BottomTabbedPage formsPage = (BottomTabbedPage)Element;
if (!_bottomBarInit && !formsPage.Labels)
{
var childViews = ViewGroup.GetViewsByType(typeof(BottomNavigationItemView));
int dpAsPixels = 0;
foreach (var childView in childViews)
{
if (dpAsPixels == 0)
{
var imageIcon = childView.FindViewById(Resource.Id.icon);
var parentHeightHalf = ((ViewGroup)childView.Parent).MeasuredHeight / 2;
var iconHeightHalf = imageIcon.MeasuredHeight / 2;
var iconTop = imageIcon.Top;
dpAsPixels = parentHeightHalf - iconHeightHalf - iconTop;
}
childView.SetPadding(childView.PaddingLeft, dpAsPixels, childView.PaddingRight, childView.PaddingBottom);
}
_bottomBarInit = true;
}
}
protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
{
base.OnElementPropertyChanged(sender, e);
if (e.PropertyName.Equals(CustomTabbedPage.IsHiddenProperty.PropertyName) && Element is CustomTabbedPage customTabbed)
{
var views = ViewGroup.GetViewsByType(typeof(BottomNavigationView));
if (views != null && views.Any())
{
var bottomView = views.FirstOrDefault() as BottomNavigationView;
//bottomView.Visibility = customTabbed.IsHidden ? ViewStates.Invisible : ViewStates.Visible;
//bottomView.TranslationY = customTabbed.IsHidden ? bottomView.TranslationY + bottomView.Height : bottomView.TranslationY - bottomView.Height;
//TODO: Glenn - Hmm hiding bottom tabbar leaves empty space in Android
if (customTabbed.IsHidden)
{
bottomView.Animate().TranslationY(bottomView.Height);
}
else
{
bottomView.Animate().TranslationY(0);
}
}
}
}
protected override void OnElementChanged(ElementChangedEventArgs <TabbedPage> e)
{
base.OnElementChanged(e);
BottomTabbedPage formsPage = (BottomTabbedPage)Element;
if (!formsPage.Labels)
{
var childViews = ViewGroup.GetViewsByType(typeof(BottomNavigationItemView));
foreach (var childView in childViews)
{
childView.FindAndRemoveById(Resource.Id.largeLabel);
childView.FindAndRemoveById(Resource.Id.smallLabel);
}
}
if (e.NewElement != null)
{
var relativeLayout = this.GetChildAt(0) as Android.Widget.RelativeLayout;
if (relativeLayout != null)
{
var bottomNavigationView = relativeLayout.GetChildAt(1) as BottomNavigationView;
bottomNavigationView.SetShiftMode(false, false);
BottomNavigationMenuView bottomNavigationMenuView = (BottomNavigationMenuView)bottomNavigationView.GetChildAt(0);
int tabCount = formsPage.Tabs.Count;
for (int i = 0; i < tabCount; i++)
{
var tabData = formsPage.Tabs[0];
BottomNavigationItemView tabItemView = (BottomNavigationItemView)bottomNavigationMenuView.GetChildAt(i);
if (tabData.BadgeCaption > 0)
{
if (_badgeId == 0)
{
_badgeId = Android.Views.View.GenerateViewId();
}
TextView badgeTextView = new BadgeView(Context)
{
Id = _badgeId, BadgeCaption = tabData.BadgeCaption.ToString(), BadgeColor = tabData.BadgeColor.ToAndroid()
};
tabData.PropertyChanged += (sender, args) =>
{
TabData currentTabData = (TabData)sender;
BottomNavigationItemView currentTabItemView = _tabViews[currentTabData];
BadgeView currentBadgeTextView = currentTabItemView.FindViewById(_badgeId) as BadgeView;
if (currentBadgeTextView != null)
{
currentBadgeTextView.BadgeColor = currentTabData.BadgeColor.ToAndroid();
currentBadgeTextView.BadgeCaption = currentTabData.BadgeCaption > 0 ? currentTabData.BadgeCaption.ToString() : string.Empty;
}
};
tabItemView.AddView(badgeTextView);
_tabViews.Add(tabData, tabItemView);
}
}
}
}
}