SetFocusOnClickedBehavior.cs

using System.ComponentModel;
 
namespace NeuroAccessMaui.UI.Behaviors
{
    public class SetFocusOnClickedBehavior : Behavior<View>
    {
        [TypeConverter(typeof(ReferenceTypeConverter))]
        public View? SetFocusTo { get; set; }
 
        protected override void OnAttachedTo(View View)
        {
            if (View is Controls.ImageButton ImageButton)
                ImageButton.Clicked += this.Button_Clicked;
            else if (View is Button Button)
                Button.Clicked += this.Button_Clicked;
 
            base.OnAttachedTo(View);
        }
 
        protected override void OnDetachingFrom(View View)
        {
            if (View is Controls.ImageButton ImageButton)
                ImageButton.Clicked -= this.Button_Clicked;
            else if (View is Button Button)
                Button.Clicked -= this.Button_Clicked;
 
            base.OnDetachingFrom(View);
        }
 
        private void Button_Clicked(object? Sender, EventArgs e)
        {
            FocusOn(this.SetFocusTo!);
        }
 
        public static void FocusOn(View Element)
        {
            if (Element is not null && Element.IsVisible)
            {
                Element.Focus();
 
                if (Element is Entry Entry && Entry.Text is not null)
                    Entry.CursorPosition = Entry.Text.Length;
            }
        }
    }
}