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using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Threading.Tasks;
using Xamarin.Forms.CustomAttributes;
#if UITEST
using Xamarin.UITest;
using NUnit.Framework;
#endif
namespace Xamarin.Forms.Controls.Issues
{
[Preserve(AllMembers = true)]
[Issue(IssueTracker.Bugzilla, 39821, "ViewExtension.TranslateTo cannot be invoked on Main thread")]
public class Bugzilla39821 : TestContentPage
{
protected override void Init()
{
var box = new BoxView { BackgroundColor = Color.Blue, WidthRequest = 50, HeightRequest = 50, HorizontalOptions = LayoutOptions.Center };
var instructions = new Label { Text = "Click the 'Animate' button to run animation on the box. If the animations complete without crashing, this test has passed." };
var success = new Label { Text = "Success", IsVisible = false };
var button = new Button() { Text = "Animate" };
Content = new StackLayout
{
VerticalOptions = LayoutOptions.Fill,
HorizontalOptions = LayoutOptions.Fill,
Children =
{
instructions,
success,
button,
new AbsoluteLayout
{
Children = { box },
HorizontalOptions = LayoutOptions.Fill,
VerticalOptions = LayoutOptions.Fill
}
}
};
button.Clicked += async (sender, args) => {
// Run a bunch of animations from the thread pool
await Task.WhenAll(
Task.Run(async () => await Translate(box)),
Task.Run(async () => await CheckTranslateRunning(box)),
Task.Run(async () => await AnimateScale(box)),
Task.Run(async () => await Rotate(box)),
Task.Run(async () => await Animate(box)),
Task.Run(async () => await Kinetic(box)),
Task.Run(async () => await Cancel(box))
);
success.IsVisible = true;
};
}
#pragma warning disable 1998 // considered for removal
async Task CheckTranslateRunning(BoxView box)
#pragma warning restore 1998
{
Debug.WriteLine(box.AnimationIsRunning("TranslateTo") ? "Translate is running" : "Translate is not running");
}
static async Task Translate(BoxView box)
{
var currentX = box.X;
var currentY = box.Y;
await box.TranslateTo(currentX, currentY + 100);
await box.TranslateTo(currentX, currentY);
}
static async Task AnimateScale(BoxView box)
{
await box.ScaleTo(2);
await box.ScaleTo(0.5);
}
static async Task Rotate(BoxView box)
{
await box.RelRotateTo(360);
}
#pragma warning disable 1998 // considered for removal
async Task Cancel(BoxView box)
#pragma warning restore 1998
{
box.AbortAnimation("animate");
box.AbortAnimation("kinetic");
}
#pragma warning disable 1998 // considered for removal
async Task Animate(BoxView box)
#pragma warning restore 1998
{
box.Animate("animate", d => d, d => { }, 100, 1);
}
#pragma warning disable 1998 // considered for removal
async Task Kinetic(BoxView box)
#pragma warning restore 1998
{
var resultList = new List<Tuple<double, double>>();
box.AnimateKinetic("kinetic", (distance, velocity) =>
{
resultList.Add(new Tuple<double, double>(distance, velocity));
return true;
}, 100, 1);
}
#if UITEST
[Test]
public void DoesNotCrash()
{
RunningApp.Tap(q => q.Marked("Animate"));
RunningApp.WaitForElement(q => q.Marked("Success"));
}
#endif
}
}
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