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);
}
}
}
}
}
private void UpgradeTabbedItemsAppereance()
{
if (bottomTabBarItemsStateList == null)
{
InitializeBottomTabBarItemsStateList();
}
if (ViewGroup != null && ViewGroup.ChildCount > 0)
{
BottomNavigationView bottomNavigationView = FindChildOfType <BottomNavigationView>(ViewGroup);
bottomNavigationView.SetShiftMode(false, false);
BottomNavigationMenuView bottomNavigationMenuView = FindChildOfType <BottomNavigationMenuView>(ViewGroup);
for (int i = 0; i < bottomNavigationMenuView.ChildCount; i++)
{
BottomNavigationItemView item = (BottomNavigationItemView)bottomNavigationMenuView.GetChildAt(i);
item.SetTextColor(bottomTabBarItemsStateList);
item.SetShifting(false);
item.SetLabelVisibilityMode(LabelVisibilityMode.LabelVisibilityLabeled);
item.SetChecked(item.ItemData.IsChecked);
Android.Views.View activeLabel = item.FindViewById(Resource.Id.largeLabel);
if (activeLabel is TextView)
{
var font = Typeface.CreateFromAsset(_context.Assets, "Montserrat-SemiBold.ttf");
(activeLabel as TextView).Typeface = font;
}
Android.Views.View inActiveLabel = item.FindViewById(Resource.Id.smallLabel);
if (activeLabel is TextView)
{
var font = Typeface.CreateFromAsset(_context.Assets, "Montserrat-SemiBold.ttf");
(inActiveLabel as TextView).Typeface = font;
}
}
}
T FindChildOfType <T>(ViewGroup viewGroup) where T : Android.Views.View
{
if (viewGroup == null || viewGroup.ChildCount == 0)
{
return(null);
}
for (var i = 0; i < viewGroup.ChildCount; i++)
{
var child = viewGroup.GetChildAt(i);
var typedChild = child as T;
if (typedChild != null)
{
return(typedChild);
}
if (!(child is ViewGroup))
{
continue;
}
var result = FindChildOfType <T>(child as ViewGroup);
if (result != null)
{
return(result);
}
}
return(null);
}
}
