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using Xamarin.Forms.CustomAttributes;
using Xamarin.Forms.Internals;
using System;
using System.Threading.Tasks;
#if UITEST
using Xamarin.UITest;
using NUnit.Framework;
#endif
namespace Xamarin.Forms.Controls.Issues
{
[Preserve(AllMembers = true)]
[Issue(IssueTracker.Bugzilla, 28953, "Device.StartTimer (still) behaves differently on different platforms", PlatformAffected.All)]
public class Bugzilla28953 : TestContentPage // or TestMasterDetailPage, etc ...
{
int count = 0, count2 = 0;
Label label2, label3;
bool shouldStop, shouldStop2;
protected override void Init()
{
var stackLayout = new StackLayout
{
Orientation = StackOrientation.Vertical,
VerticalOptions = LayoutOptions.Center,
Spacing = 20
};
var label1 = new Label
{
Text = "Click Start to start counting with a timer. Click Stop to reset. Both timers update text in UI thread."
};
stackLayout.Children.Add(label1);
label2 = new Label
{
Text = count.ToString(),
HorizontalTextAlignment = TextAlignment.Center,
};
stackLayout.Children.Add(label2);
label3 = new Label
{
Text = count2.ToString(),
HorizontalTextAlignment = TextAlignment.Center,
};
stackLayout.Children.Add(label3);
var button = new Button
{
Text = "Start"
};
button.Clicked += Button_Clicked;
stackLayout.Children.Add(button);
var button2 = new Button
{
Text = "Start (in background thread)"
};
button2.Clicked += Button_Clicked2;
stackLayout.Children.Add(button2);
Content = stackLayout;
}
private void Button_Clicked(object sender, EventArgs e)
{
var button = sender as Button;
if (button.Text == "Start")
{
(sender as Button).Text = "Stop";
shouldStop = false;
Device.StartTimer(TimeSpan.FromMilliseconds(100), () =>
{
label2.Text = count.ToString();
count++;
return !shouldStop;
});
}
else
{
button.Text = "Start";
shouldStop = true;
count = 0;
}
}
private void Button_Clicked2(object sender, EventArgs e)
{
var button = sender as Button;
if (button.Text == "Start (in background thread)")
{
(sender as Button).Text = "Stop (in background thread)";
shouldStop2 = false;
Task.Run(() =>
{
Device.StartTimer(TimeSpan.FromMilliseconds(100), () =>
{
label3.Text = count2.ToString();
count2++;
return !shouldStop2;
});
});
}
else
{
button.Text = "Start (in background thread)";
shouldStop2 = true;
count2 = 0;
}
}
}
}
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