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using System;
using Xamarin.Forms.CustomAttributes;
#if UITEST
using Xamarin.UITest;
using NUnit.Framework;
#endif
namespace Xamarin.Forms.Controls
{
public interface ICacheService
{
void ClearImageCache ();
}
[Preserve (AllMembers = true)]
[Issue (IssueTracker.Bugzilla, 32691, "Clearing an image by setting Image.Source to null, while Image.IsLoading is true, doesn't work.")]
public class Bugzilla32691 : TestContentPage
{
const string KSetImageSource = "SET IMAGE SOURCE";
const string KClearImageSource = "CLEAR IMAGE SOURCE";
protected override void Init ()
{
#pragma warning disable 618
var label = new Label () { XAlign = TextAlignment.Center };
#pragma warning restore 618
var image = new Image ();
image.PropertyChanged += (sender, e) => {
if (e.PropertyName == "IsLoading")
label.Text = image.IsLoading ? "Loading" : "Done";
};
var btnSetOrClear = new Button () { Text = KSetImageSource, AutomationId = "btnLoad" };
btnSetOrClear.Clicked += delegate {
if (btnSetOrClear.Text == KSetImageSource) {
ClearImageCache ();
image.Source =
"http://www.public-domain-image.com/free-images/miscellaneous/big-high-border-fence.jpg";
btnSetOrClear.Text = KClearImageSource;
} else {
image.Source = null;
btnSetOrClear.Text = KSetImageSource;
}
};
Content = new StackLayout {
Orientation = StackOrientation.Vertical,
Padding = new Thickness (10),
Children = { btnSetOrClear, image, label }
};
}
void ClearImageCache ()
{
var cacheService = DependencyService.Get<ICacheService> ();
cacheService?.ClearImageCache ();
}
}
}
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