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/*************************************************************************************
Extended WPF Toolkit
Copyright (C) 2007-2013 Xceed Software Inc.
This program is provided to you under the terms of the Microsoft Public
License (Ms-PL) as published at http://wpftoolkit.codeplex.com/license
For more features, controls, and fast professional support,
pick up the Plus Edition at http://xceed.com/wpf_toolkit
Stay informed: follow @datagrid on Twitter or Like http://facebook.com/datagrids
***********************************************************************************/
using System;
using System.Windows.Input;
namespace Xceed.Wpf.AvalonDock.Commands
{
internal class RelayCommand : ICommand
{
#region Fields
private readonly Action<object> _execute;
private readonly Predicate<object> _canExecute;
#endregion // Fields
#region Constructors
public RelayCommand( Action<object> execute )
: this( execute, null )
{
}
public RelayCommand( Action<object> execute, Predicate<object> canExecute )
{
if( execute == null )
throw new ArgumentNullException( "execute" );
_execute = execute;
_canExecute = canExecute;
}
#endregion // Constructors
#region ICommand Members
public bool CanExecute( object parameter )
{
return _canExecute == null ? true : _canExecute( parameter );
}
public event EventHandler CanExecuteChanged
{
add
{
CommandManager.RequerySuggested += value;
}
remove
{
CommandManager.RequerySuggested -= value;
}
}
public void Execute( object parameter )
{
_execute( parameter );
}
#endregion // ICommand Members
}
}
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