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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Xamarin.Forms.CustomAttributes;
using Xamarin.Forms.Internals;
namespace Xamarin.Forms.Controls
{
[Preserve (AllMembers=true)]
[Issue (IssueTracker.Github, 1769, "PushAsync with Switch produces NRE", PlatformAffected.Android)]
public class Issue1769
: ContentPage
{
public Issue1769()
{
var button = new Button()
{
Text = "Go To Page 2"
};
var switchDemo = new SwitchDemoPage();
button.Clicked += async (sender, args) => {
await ((Button)sender).Navigation.PushAsync(switchDemo);
};
Content = button;
}
class SwitchDemoPage : ContentPage
{
Label _label;
public SwitchDemoPage()
{
Label header = new Label
{
Text = "Switch",
#pragma warning disable 618
Font = Font.BoldSystemFontOfSize(50),
#pragma warning restore 618
HorizontalOptions = LayoutOptions.Center
};
Switch switcher = new Switch
{
HorizontalOptions = LayoutOptions.Center,
VerticalOptions = LayoutOptions.CenterAndExpand
};
switcher.Toggled += switcher_Toggled;
_label = new Label
{
Text = "Switch is now False",
#pragma warning disable 618
Font = Font.SystemFontOfSize(NamedSize.Large),
#pragma warning restore 618
HorizontalOptions = LayoutOptions.Center,
VerticalOptions = LayoutOptions.CenterAndExpand
};
// Accomodate iPhone status bar.
Padding = new Thickness(10, Device.OnPlatform(20, 0, 0), 10, 5);
// Build the page.
Content = new StackLayout
{
Children =
{
header,
switcher,
_label
}
};
}
void switcher_Toggled(object sender, ToggledEventArgs e)
{
_label.Text = string.Format("Switch is now {0}", e.Value);
}
}
}
}
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