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using System;
using System.Diagnostics;
using Xamarin.Forms.CustomAttributes;
using Xamarin.Forms.Internals;
#if UITEST
using Xamarin.UITest;
using NUnit.Framework;
#endif
namespace Xamarin.Forms.Controls
{
[Preserve(AllMembers = true)]
[Issue(IssueTracker.Bugzilla, 40005, "Navigation Bar back button does not show when using InsertPageBefore")]
public class Bugzilla40005 : TestContentPage // or TestMasterDetailPage, etc ...
{
public Bugzilla40005()
{
Application.Current.MainPage = new NavigationPage(new Page1());
}
protected override void Init()
{
}
public class Page1 : ContentPage
{
bool pageInserted;
public Page1()
{
Button btn = new Button() {
Text = "Go to Page 2"
};
btn.Clicked += async (sender, e) => {
await Navigation.PushAsync(new Page2());
};
Content = new StackLayout {
VerticalOptions = LayoutOptions.Center,
Children = {
new Label {
HorizontalTextAlignment = TextAlignment.Center,
Text = "Page 1"
},
btn
}
};
}
protected override void OnAppearing()
{
base.OnAppearing();
if(!pageInserted) {
Navigation.InsertPageBefore(new InsertedPage(), this);
pageInserted = true;
}
}
protected override bool OnBackButtonPressed()
{
Debug.WriteLine("Hardware BackButton Pressed on Page1");
return base.OnBackButtonPressed();
}
}
public class InsertedPage : ContentPage
{
public InsertedPage()
{
Content = new StackLayout {
VerticalOptions = LayoutOptions.Center,
Children = {
new Label {
HorizontalTextAlignment = TextAlignment.Center,
Text = "Inserted page"
}
}
};
}
protected override bool OnBackButtonPressed()
{
Debug.WriteLine("Hardware BackButton Pressed on InsertedPage");
return base.OnBackButtonPressed();
}
}
public class Page2 : ContentPage
{
public Page2()
{
Content = new StackLayout {
VerticalOptions = LayoutOptions.Center,
Children = {
new Label {
HorizontalTextAlignment = TextAlignment.Center,
Text = "Page 2"
}
}
};
}
protected override bool OnBackButtonPressed()
{
Debug.WriteLine("Hardware BackButton Pressed on Page2");
return base.OnBackButtonPressed();
}
}
}
}
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