using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
 
using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Views;
using Android.Widget;
 
namespace Microsoft.Maui.Controls.Compatibility.Platform.Android
{
	internal static class ScrollViewExtensions
	{
		internal static void HandleScrollBarVisibilityChange(this IScrollView scrollView)
		{
			// According to the Android Documentation
			// * <p>AwakenScrollBars method should be invoked every time a subclass directly updates
			// *the scroll parameters.</ p >
 
			// If AwakenScrollBars is never called there are cases where the ScrollDrawable is never called
			// which causes a crash during draw
 
			if (scrollView.ScrollBarsInitialized)
				scrollView.AwakenScrollBars();
 
			// The scrollbar drawable won't initialize if ScrollbarFadingEnabled == false
			if (!scrollView.ScrollbarFadingEnabled)
			{
				scrollView.ScrollbarFadingEnabled = true;
				scrollView.AwakenScrollBars();
				scrollView.ScrollbarFadingEnabled = false;
			}
			else
			{
				scrollView.AwakenScrollBars();
			}
 
			scrollView.ScrollBarsInitialized = true;
		}
	}
}