using System;

using System.Windows.Input;

namespace CADSnoop.Model

{

public class RelayCommand : ICommand

{

readonly Action _execute;

readonly Func<bool> _canExecute;

public RelayCommand(Action execute, Func<bool> canExecute)

{

if (execute == null)

throw new NullReferenceException("execute");

_execute = execute;

_canExecute = canExecute;

}

public RelayCommand(Action execute) : this(execute, null)

{

}

public event EventHandler CanExecuteChanged

{

add => CommandManager.RequerySuggested += value;

remove => CommandManager.RequerySuggested -= value;

}

public bool CanExecute(object parameter)

{

return _canExecute == null ? true : _canExecute();

}

public void Execute(object parameter)

{

_execute.Invoke();

}

}

}