pla-01/Life/ViewModel/AutomatonViewModel.cs

using System;
using System.Windows.Input;
using Life.Automaton;
using Life.Misc;

namespace Life.ViewModel
{
    public class AutomatonViewModel : BaseViewModel
    {

        private int _size;
        private int _separation;
        private IAutomaton _automaton;

        public int Size
        {
            get => _size;
            set
            {
                _size = value;
                OnPropertyChanged(nameof(Size));
            }
        }

        public int Separation
        {
            get => _separation;
            set
            {
                _separation = value;
                OnPropertyChanged(nameof(Separation));
            }
        }
        
        public IAutomaton Automaton
        {
            get => _automaton;
            set
            {
                _automaton = value;
                OnPropertyChanged(nameof(Field));
                OnPropertyChanged(nameof(Iteration));
            }
        }

        public IField Field => Automaton.Field;
        public int Iteration => Automaton.Iteration;

        public ICommand CellClicked => new DelegateCommand<Position>
        {
            Action = HandleCellClick
        };

        public ICommand StepCommand => new DelegateCommand<object>
         {
             Action = Step
         };

        private void Step(object param)
        {
            Automaton.Advance();
        }

        private void HandleCellClick(Position position)
        {
            Field[position.X, position.Y].IsAlive = !Field[position.X, position.Y].IsAlive;
            Field.Notify();
        }
    }
}