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using System;
using Xamarin.Forms.CustomAttributes;
using Xamarin.Forms.Internals;
using System.Linq;
using System.Threading.Tasks;
namespace Xamarin.Forms.Controls
{
[Preserve(AllMembers = true)]
[Issue(IssueTracker.Bugzilla, 33561, "ListView Pull-to-Refresh ActivityIndicator animation stuck when navigating away and then back again")]
public class Bugzilla33561 : TestTabbedPage
{
public class ListPage : ContentPage
{
ListView _listView;
bool _isRefreshing;
public ListPage()
{
var template = new DataTemplate(typeof(TextCell));
template.SetBinding(TextCell.TextProperty, ".");
_listView = new ListView()
{
IsPullToRefreshEnabled = true,
ItemsSource = Enumerable.Range(0, 10).Select(no => $"FAIL {no}"),
ItemTemplate = template,
IsRefreshing = true
};
_listView.Refreshing += async (object sender, EventArgs e) =>
{
if (_isRefreshing)
return;
_isRefreshing = true;
await Task.Delay(10000);
_listView.EndRefresh();
_listView.ItemsSource = Enumerable.Range(0, 10).Select(no => $"SUCCESS {no}");
_isRefreshing = false;
};
Content = _listView;
Device.StartTimer(TimeSpan.FromSeconds(5), () => { _listView.IsRefreshing = false; return false; });
}
}
protected override void Init()
{
Children.Add(new NavigationPage(new ListPage()) { Title = "page 1" });
Children.Add(new ContentPage() { Title = "page 2" });
Children.Add(new ContentPage() { Title = "page 3" });
}
}
}
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