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using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Linq;
using System.Runtime.CompilerServices;
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, 1763, "First item of grouped ListView not firing .ItemTapped", PlatformAffected.WinPhone, NavigationBehavior.PushAsync)]
public class Issue1763 : TabbedPage
{
public Issue1763 ()
{
Title = "Contacts";
Children.Add (new ContactsPage ());
}
}
public class ContactsPage : ContentPage
{
public ContactsPage ()
{
var listView = new ListView {
ItemTemplate = new DataTemplate (() => {
var cell = new TextCell ();
cell.SetBinding (TextCell.TextProperty, new Binding ("Name"));
cell.SetBinding (TextCell.DetailProperty, new Binding ("Number"));
return cell;
}),
IsGroupingEnabled = true,
GroupDisplayBinding = new Binding ("Name")
};
var groupedContacts = new ObservableCollection<Group<ContactViewModel>> {
new Group<ContactViewModel> ("E", new[] {
new ContactViewModel { Name = "Egor1", Number = "'Tap' on this item won't fire the event" },
new ContactViewModel { Name = "Egor2", Number = "123" },
new ContactViewModel { Name = "Egor3", Number = "123" },
})
};
listView.ItemsSource = groupedContacts;
listView.ItemTapped += ListViewOnItemTapped;
Content = listView;
}
void ListViewOnItemTapped (object sender, ItemTappedEventArgs itemTappedEventArgs)
{
DisplayActionSheet ("Tapped a List item", "Cancel", "Destruction");
}
}
public class ContactViewModel : ViewModelBase2
{
string _name;
string _number;
public string Name
{
get { return _name; }
set { SetProperty (ref _name, value); }
}
public string Number
{
get { return _number; }
set { SetProperty (ref _number, value); }
}
}
public class Group<TItem> : ObservableCollection<TItem>
{
public Group (string name, IEnumerable<TItem> items)
{
Name = name;
foreach (var item in items)
Add (item);
}
public string Name { get; set; }
}
public class ViewModelBase2 : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
protected virtual ViewModelBase2 SetProperty<T> (ref T field, T value, [CallerMemberName] string propertyName = null)
{
field = value;
PropertyChangedEventHandler handler = PropertyChanged;
if (handler != null)
handler (this, new PropertyChangedEventArgs (propertyName));
return this;
}
}
}
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