Presentation Patterns for XAML based Applications

// -- FILE ------------------------------------------------------------------
// name       : ExpandCommand.cs
// project    : Itenso Community
// created    : Jani Giannoudis - 2012.05.05
// language   : c#
// environment: .NET 4.0
// copyright  : (c) 2004-2012 by Itenso GmbH, Switzerland
// --------------------------------------------------------------------------
using System;
using Itenso.Community.XamlPatterns.Actions.Navigation;
using Itenso.Community.XamlPatterns.Windows.Input;

namespace Itenso.Community.XamlPatterns.Commands.Navigation
{

	// ------------------------------------------------------------------------
	public class ExpandCommand : Command
	{

		// ----------------------------------------------------------------------
		public ExpandCommand( IExpandable expandable )
		{
			if ( expandable == null )
			{
				throw new ArgumentNullException( "expandable" );
			}
			this.expandable = expandable;
		} // ExpandCommand

		// ----------------------------------------------------------------------
		public IExpandable Expandable
		{
			get { return expandable; }
		} // Expandable

		// ----------------------------------------------------------------------
		protected override bool IsAvailable( object parameter )
		{
			return Expandable.IsExpandable;
		} // IsAvailable

		// ----------------------------------------------------------------------
		protected override bool DoExecute( object parameter )
		{
			Expandable.Expand();
			return true;
		} // DoExecute

		// ----------------------------------------------------------------------
		// members
		private readonly IExpandable expandable;

	} // class ExpandCommand

} // namespace Itenso.Community.XamlPatterns.Commands.Navigation
// -- EOF -------------------------------------------------------------------