﻿// Copyright (c) 2014 AlphaSierraPapa for the SharpDevelop Team
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this
// software and associated documentation files (the "Software"), to deal in the Software
// without restriction, including without limitation the rights to use, copy, modify, merge,
// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
// to whom the Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or
// substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
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// DEALINGS IN THE SOFTWARE.

#nullable enable
using System;
using System.Windows.Input;

namespace Altaxo.AddInItems
{
  public interface ICheckableMenuCommand : ICommand
  {
    bool IsChecked(object parameter);

    /// <summary>
    /// Event that occurs when the checked state of the command changes.
    /// Warning: this is a weak event like <c>ICommand.CanExecuteChanged</c>!
    /// Subscribers need to ensure they keep a reference to the delegate alive.
    /// Implementers need to ensure they use a weak reference to the delegate.
    /// </summary>
    event EventHandler? IsCheckedChanged;
  }
}
