Forums | NoesisGUI

    
<Grid>
        <ListBox SelectedItem="{Binding Item}" ItemsSource="{Binding Items}">
            
        </ListBox>
    </Grid>

    [UserControlSource("Assets/View.xaml")]
    public class MyUserControlControl : UserControl
    {
        public void OnPostInit()
        {
            DataContext = new ViewModel();
        }
    }

public class ViewModel : INotifyPropertyChanged
    {
        private List<string> _items;
        private string _selectedItem;

        public ViewModel()
        {
            Items = new List<string>{"One","Two","Three"};
        }

        public string Item
        {
            get 
            { 
                //This code is getting called constantly.
                return _selectedItem; 
            }
            set
            {
                //This code is never being hit.
                _selectedItem = value; 
                OnPropertyChanged("Item");
            }
        }

        public List<string> Items
        {
            get { return _items; }
            set
            {
                _items = value; 
                OnPropertyChanged("Items");
            }
        }

        public event PropertyChangedEventHandler PropertyChanged;

        protected virtual void OnPropertyChanged(string propertyName)
        {
            PropertyChangedEventHandler handler = PropertyChanged;
            if (handler != null) handler(this, new PropertyChangedEventArgs(propertyName));
        }
    }

// Base class for all property change notification classes
public class NotifyPropertyChangedBase  : INotifyPropertyChanged
{
    public event PropertyChangedEventHandler PropertyChanged;

    protected virtual void OnPropertyChanged(string propertyName)
    {
        PropertyChangedEventHandler handler = PropertyChanged;
        if (handler != null)
            handler(this, new PropertyChangedEventArgs(propertyName));
    }
}

// I made this wrapper class using generics so it can be used for any basic type
public class Val<T> : NotifyPropertyChangedBase
{
    public Val(T t) { Value = t; }

    public static implicit operator T(Val<T> v) { return v.Value; }
    public static implicit operator Val<T>(T t) { return new Val<T>(t); }

    public override string ToString() { return Value.ToString(); }

    T _value;
    public T Value
    {
        get { return _value; }
        set { _value = value; OnPropertyChanged("Value"); }
    }
}

// Your ViewModel
public class ViewModel : NotifyPropertyChangedBase
{
    private Val<string> _selectedItem;

    public ViewModel()
    {
        Items = new List<Val<string>> { "One", "Two", "Three" };
    }

    public Val<string> Item
    {
        get { return _selectedItem; }
        set
        {
            _selectedItem = value;
            OnPropertyChanged("Item");
        }
    }

    public List<Val<string>> Items { get; private set; }
}

<ListBox SelectedItem="{Binding Item}" ItemsSource="{Binding Items}">
    <ListBox.ItemTemplate>
        <DataTemplate>
            <TextBlock Text="{Binding Value}"/>
        </DataTemplate>
    </ListBox.ItemTemplate>
</ListBox>

<ListBox ItemsSource="{Binding Names}"
         SelectedItem="{Binding SelectedName}" />

public string SelectedName { get; set; }
public ObservableCollection<string> Names { get; set; }

public class ViewModel
{
    private string _selectedName;
    public string SelectedName
    {
        get { return _selectedName; }
        set
        {
            if (_selectedName != value)
            {
                _selectedName = value;
                UnityEngine.Debug.Log("Selected=" + _selectedName);
            }
        }
    }

    public ObservableCollection<string> Names { get; set; }
}

public class TestBehavior : MonoBehaviour
{
    private void Start()
    {
        NoesisView view = GetComponent<NoesisView>();

        ViewModel vm = new ViewModel();
        vm.Names = new ObservableCollection<string>()
        {
            "First", "Second", "Third", "Fouth"
        };

        view.Content.DataContext = vm;
    }
}

<Grid
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <ListBox Width="300" Height="300"
        ItemsSource="{Binding Names}"
        SelectedItem="{Binding SelectedName}" />
</Grid>

if (Names.Contains(SelectedName))
{
	Names.Remove(SelectedName);
}