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using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Runtime.CompilerServices;
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, 37841, "TableView EntryCells and TextCells cease to update after focus change", PlatformAffected.Android)]
public class Bugzilla37841 : TestContentPage
{
_37841ViewModel _viewModel;
protected override void Init ()
{
_viewModel = new _37841ViewModel ();
var instructions = new Label { FontSize = 16, Text = @"Click on the Generate button.
The EntryCell should display '12345' and the TextCell should display '6789'.
Click on the Generate button a second time.
The EntryCell should display '112358' and the TextCell should display '48151623'." };
var button = new Button { Text = "Generate" };
button.SetBinding (Button.CommandProperty, nameof (_37841ViewModel.GetNextNumbersCommand));
var random1 = new EntryCell { IsEnabled = false, Label = "Entry Cell" };
random1.SetBinding (EntryCell.TextProperty, nameof (_37841ViewModel.Value1));
var textCell = new TextCell { IsEnabled = false, Detail = "TextCell" };
textCell.SetBinding (TextCell.TextProperty, nameof (_37841ViewModel.Value2));
var buttonViewCell = new ViewCell { View = button };
var section = new TableSection ("") {
random1,
textCell,
buttonViewCell
};
var root = new TableRoot { section };
var tv = new TableView { Root = root };
Content = new StackLayout {
Children = { instructions, tv }
};
BindingContext = _viewModel;
}
[Preserve (AllMembers = true)]
public class _37841ViewModel : INotifyPropertyChanged
{
public int Value1
{
get { return _value1; }
set
{
if (value != _value1) {
_value1 = value;
RaisePropertyChanged ();
}
}
}
public int Value2
{
get { return _value2; }
set
{
if (value != _value2) {
_value2 = value;
RaisePropertyChanged ();
}
}
}
public Command GetNextNumbersCommand
=> _getNextNumbersCommand ?? (_getNextNumbersCommand = new Command (ExecuteGenerateRandomCommand));
class SomeNumbers : IEnumerable<int>
{
public IEnumerator<int> GetEnumerator ()
{
while (true) {
yield return 12345;
yield return 6789;
yield return 112358;
yield return 48151623;
}
}
IEnumerator IEnumerable.GetEnumerator ()
{
return GetEnumerator ();
}
}
readonly IEnumerator<int> _numberList = new SomeNumbers ().GetEnumerator ();
void ExecuteGenerateRandomCommand ()
{
_numberList.MoveNext ();
Value1 = _numberList.Current;
_numberList.MoveNext ();
Value2 = _numberList.Current;
}
void RaisePropertyChanged ([CallerMemberName] string propertyName = null)
{
PropertyChangedEventHandler handler = PropertyChanged;
handler?.Invoke (this, new PropertyChangedEventArgs (propertyName));
}
#region INotifyPropertyChanged implementation
public event PropertyChangedEventHandler PropertyChanged;
#endregion
Command _getNextNumbersCommand;
int _value1;
int _value2;
}
#if UITEST
[Test]
public void TextAndEntryCellsDataBindInTableView()
{
RunningApp.WaitForElement ("Generate");
RunningApp.Tap("Generate");
RunningApp.Screenshot ("First Generate Tap");
RunningApp.WaitForElement("12345");
RunningApp.WaitForElement("6789");
RunningApp.Tap("Generate");
RunningApp.Screenshot("Second Generate Tap");
RunningApp.WaitForElement("112358");
RunningApp.WaitForElement("48151623");
}
#endif
}
}
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