protected override void OnElementChanged(ElementChangedEventArgs <TabbedPage> e)
{
base.OnElementChanged(e);
if (e.NewElement == null || e.OldElement != null)
{
return;
}
TabLayout tablayout = (TabLayout)ViewGroup.GetChildAt(1);
Android.Views.ViewGroup vgroup = (Android.Views.ViewGroup)tablayout.GetChildAt(0);
for (int i = 0; i < vgroup.ChildCount; i++)
{
Android.Views.ViewGroup vvgroup = (Android.Views.ViewGroup)vgroup.GetChildAt(i);
Typeface fontFace = Typeface.CreateFromAsset(this.Context.Assets, "IranSans.ttf");
for (int j = 0; j < vvgroup.ChildCount; j++)
{
Android.Views.View vView = (Android.Views.View)vvgroup.GetChildAt(j);
if (vView.GetType() == typeof(Android.Support.V7.Widget.AppCompatTextView) || vView.GetType() == typeof(Android.Widget.TextView))
{
//here change textview style
TextView txtView = (TextView)vView;
txtView.TextSize = 14f;
txtView.SetTypeface(fontFace, TypefaceStyle.Normal);
}
}
}
}
internal static IEnumerable <T> GetChildrenOfType <T>(this AViewGroup self)
where T : AView
{
for (int i = 0; i < self.ChildCount; i++)
{
AView?child = self.GetChildAt(i);
if (child == null)
{
continue;
}
if (child is T typedChild)
{
yield return(typedChild);
}
if (child is AViewGroup childAsViewGroup)
{
IEnumerable <T> myChildren = childAsViewGroup.GetChildrenOfType <T>();
foreach (T nextChild in myChildren)
{
yield return(nextChild);
}
}
}
}
/// <summary>
/// Traverses document tree to attach listeners to view items marked with "Number" or "Operation" tags.
/// </summary>
/// <param name="view"></param>
private void AttachListeners(Android.Views.View view)
{
Android.Views.ViewGroup group = view as Android.Views.ViewGroup;
if (group != null)
{
for (int i = 0; i < group.ChildCount; i++)
{
var child = group.GetChildAt(i);
var childGroup = child as Android.Views.ViewGroup;
if (childGroup != null)
{
AttachListeners(childGroup);
}
else
{
if (child.Tag != null)
{
string tag = child.Tag.ToString();
if (tag.CompareTo(Globals.CALC_NUMBER) == 0)
{
child.Click += Number_Click;
}
else if (tag.CompareTo(Globals.CALC_OPERATION) == 0)
{
child.Click += Operation_Click;
}
}
}
}
}
}
internal static IEnumerable <T> GetChildrenOfType <T>(this AViewGroup self) where T : AView
{
for (var i = 0; i < self.ChildCount; i++)
{
AView child = self.GetChildAt(i);
var typedChild = child as T;
if (typedChild != null)
{
yield return(typedChild);
}
if (child is AViewGroup)
{
IEnumerable <T> myChildren = (child as AViewGroup).GetChildrenOfType <T>();
foreach (T nextChild in myChildren)
{
yield return(nextChild);
}
}
}
}
internal static IEnumerable <T> GetChildrenOfType <T>(this AViewGroup self) where T : AView
{
for (var i = 0; i < self.ChildCount; i++)
{
var child = self.GetChildAt(i);
if (child is T typedChild)
{
yield return(typedChild);
}
if (!(child is AViewGroup))
{
continue;
}
var myChildren = (child as AViewGroup).GetChildrenOfType <T>();
foreach (var nextChild in myChildren)
{
yield return(nextChild);
}
}
}
public static T?GetFirstChildOfType <T>(this AViewGroup viewGroup) where T : AView
{
for (var i = 0; i < viewGroup.ChildCount; i++)
{
AView?child = viewGroup.GetChildAt(i);
if (child is T typedChild)
{
return(typedChild);
}
if (child is AViewGroup vg)
{
var descendant = vg.GetFirstChildOfType <T>();
if (descendant != null)
{
return(descendant);
}
}
}
return(null);
}
public static IEnumerable <T> GetChildrenOfType <T>(this AViewGroup viewGroup) where T : AView
{
for (var i = 0; i < viewGroup.ChildCount; i++)
{
AView?child = viewGroup.GetChildAt(i);
if (child is T typedChild)
{
yield return(typedChild);
}
if (child is AViewGroup)
{
IEnumerable <T>?myChildren = (child as AViewGroup)?.GetChildrenOfType <T>();
if (myChildren != null)
{
foreach (T nextChild in myChildren)
{
yield return(nextChild);
}
}
}
}
}
