yavsc/BookAStar/BookAStar/ViewModels/ViewModelBase.cs

using BookAStar.Helpers;
using BookAStar.Interfaces;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Linq.Expressions;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading.Tasks;

namespace BookAStar.ViewModels
{
    [Obsolete("Use legacy XLabs ViewModel")]
    public class ViewModelBase : IModelViewModel
    {
        public string Title { get; set; }

        public event PropertyChangedEventHandler PropertyChanged;

        public void SetState<T>(Action<T> action) where T : class, IModelViewModel
        {
            action(this as T);
        }

        protected virtual bool SetProperty<T>(ref T storage, T value, [CallerMemberName] string propertyName = null)
        {
            if (object.Equals(storage, value)) return false;

            storage = value;
            OnPropertyChanged(propertyName);

            return true;
        }

        protected void OnPropertyChanged([CallerMemberName] string propertyName = null)
        {
            PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
        }

        protected void OnPropertyChanged<T>(Expression<Func<T>> propertyExpression)
        {
            OnPropertyChanged( PropertySupport.ExtractPropertyName<T>( propertyExpression)); 
        }
    }
}